KR20210057231A - Grid participant charging system for easy management of multiple chargers - Google Patents

Abstract

The present invention relates to an electric vehicle charging system with easy management of multiple chargers. More specifically, when a charger is used for charging an electric vehicle in a charging station having the multiple chargers, a necessary charging amount of the electric vehicle is considered to determine use priority of the multiple chargers and displayed, and the electric vehicle is controlled to be charged by determining the charging priority by considering the charging amount of the charger. Therefore, the multiple charges are efficiently used and charged.

Description

Grid participant charging system for easy management of multiple chargers

The present invention relates to an electric vehicle charging system that is easy to manage a plurality of chargers, and more specifically, when using the charger for charging an electric vehicle at a charging station including a plurality of chargers, the required amount of charge of the electric vehicle is considered. By determining and displaying the use priority of a plurality of chargers, and controlling the charging priority by determining the charging priority in consideration of the charging amount of the charger, the management of a number of chargers to efficiently use and charge a plurality of chargers is possible. It is a technical field related to an easy grid participation type electric vehicle charging system.

In addition, the present invention is configured to include an integrated connector capable of charging any electric vehicle by changing only the connector according to the charging standard of the electric vehicle, and by grasping the information on the battery capacity of the electric vehicle using the integrated connector, This is a technical field related to a grid-participating electric vehicle charging system that facilitates the management of multiple chargers so that the same charger can be managed more efficiently.

Electricity goes through the stages of generation, transmission, and distribution due to the difference in the physical distance between the source of supply and the source of demand. Pumped hydro has emerged as an early major technology for storing power produced mainly through nuclear power generation.This technology still plays an important role in the entire power system, but the construction of power plants is restricted due to geographical features. , High construction and maintenance costs, difficulty in securing an appropriate amount of power reserve according to the time period, and a power outage caused by it is a situation in which an alternative model is needed. Distributed power technology has been proposed as a solution to the problem of the centralized power system, and the ESS (Energy Storage System) has attracted attention.

However, when using a charging station operated by multiple chargers, that is, a charger of a charging station, a charger capable of supplying the required amount of charge for the electric vehicle must be used, and the charger discharged according to the charging of the electric vehicle can be recharged and used. Although it must be maintained, there is a problem in that it is difficult to find a charger that can supply the required amount of charge for an electric vehicle, and the discharged charger is used again, so that proper charging cannot be achieved.

On the other hand, the Korean registered patent [10-1489226] discloses a control system and a control method for an electric vehicle charger including an integrated slow charger for an electric vehicle, an electric vehicle with a charging function, and a slow charger. Due to the different charging connector standards and various charging methods, it is difficult to find a charging station compatible with the electric vehicle.

Korean Patent Registration No. 10-1489226 (2015.01.28)

The present invention is a technology conceived to solve the problems according to the prior art described above. When a conventional charging station operates a plurality of chargers, it is difficult to grasp a charger capable of supplying a charge required for an electric vehicle, and a discharged charger is There is a problem that it is difficult to use the charger because it is used again;

Since electric vehicle charging connector specifications are different for each electric vehicle and charging methods are various, a problem arises in which it is difficult to find a charging station compatible with the electric vehicle, and its main purpose is to provide a solution.

The present invention is connected to a power storage unit including a plurality of battery cells and a power storage unit in order to realize the desired object as described above, and diagnoses the safety state and the presence of a fault by measuring voltage, current, and temperature, and temperature and battery It is connected to the battery management unit that controls cell balancing and the power generation source or system, the load, and the power storage unit, receives power from the power generation source or system, charges the power storage unit, and sends the charged power to the load side. Energy including a power conversion unit and an energy management unit connected to the battery management unit and the power conversion unit, monitoring and analyzing the battery management unit and the power conversion unit, controlling the battery management unit and power conversion unit, and providing charge/discharge information It is connected to the storage system and the power conversion unit and the energy management unit, and includes a power supply unit that supplies power to the electric vehicle, and the energy management unit determines and displays the available power storage unit according to the required amount of charge of the electric vehicle among the power storage units. However, depending on the current charge amount of the power storage unit, the use priority is displayed from the power storage unit with a large amount of charge, and the battery management unit is controlled by determining the charging priority so that charging is performed from the power storage unit with a small required amount of charge. A grid-participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that the charging priority of the power storage unit corresponding to the first priority among the priorities, is controlled to be the lowest priority.

In addition, the energy management unit of the present invention is characterized in that it determines the priority of use and the priority of charging except for the power storage unit currently being used.

In addition, the energy management unit of the present invention displays the use priority from the power storage unit with a large amount of charge according to the current charging amount of the power storage unit, but determines the use priority by determining the power storage unit closest to the current location of the electric vehicle. It is characterized by displaying.

In addition, the power supply unit of the present invention includes a charging socket provided with a plurality of electrical contacts and a socket fastening part formed so that one side is connected to the charging socket, and a connector formed with a charging fastening part so that the other side is connected to the electric vehicle charging port. , The socket fastening part is formed to be electrically connected to the electrical contact of the charging socket according to the standard of the electric vehicle charging connector of the charging port fastening part.

In addition, the electric vehicle charging port of the present invention is configured to include an information providing unit that provides information on the battery capacity of the electric vehicle, and the charging connection unit is connected to the electric vehicle charging unit to receive information on the electric vehicle battery capacity from the information providing unit. And an information transmission unit that receives and transmits the information to the energy management unit, wherein the energy management unit acquires information on a required charge amount of the electric vehicle among information on the electric vehicle battery capacity received from the information transmission unit.

In addition, the charging socket of the present invention includes 3 AC, 2 DC, 1 ground (GND), 1 neutral, 1 communication (CP), 1 proximity detection (PD), and start/stop ( Start/stop) 2, ENABLE 1 and CAN communication 2 electrical contacts are included, and the charging port connection part 222 is Type 1 (AC single phase), Type 2 (AC 3 phase), DC CHAdeMO, It is characterized in that any one or a plurality of CCS Type1 (Combined Charging System / DC combo), CCS Type2, Tesla, and GB/T (Guobiao Tuijian).

In addition, the energy management unit of the present invention is characterized in that it detects an electrical contact connected to the socket fastening part of the charging socket, and charges the electric vehicle with a charging standard according to the detected result.

In addition, the socket connection part of the connector of the present invention is provided with an RFID chip in which charging standard information is stored, the charging socket is provided with an RFID reader, and the energy management unit is provided with the charging standard information of the RFID chip detected by the RFID reader. It is characterized in that the electric vehicle is charged according to the charging standard.

In addition, the charging socket and the socket fastening part of the connector of the present invention are each provided with a magnet, and the charging socket and the socket fastening part are electrically contacted by magnetic attraction between the magnet of the charging socket and the magnet of the socket fastening part. And the energy management unit detects an electrical contact connected to the socket fastening portion of the charging socket, and charges the electric vehicle according to a charging standard according to the detected result.

In addition, the charging socket of the present invention is formed with a protrusion or a groove, and the socket fastening part of the connector is formed with a groove or a protrusion corresponding to the protrusion or groove formed in the charging socket, and the charging socket or socket fastening part is formed on the side of the charging socket or the socket fastening part. A contact sensing unit is installed that detects a contact point between the protrusion or groove of the charging socket and the groove or protrusion of the socket fastening unit, and the energy management unit charges the electric vehicle with a charging standard according to the result detected by the contact sensing unit. It is characterized.

In addition, the power storage unit of the present invention is characterized in that a charging line is formed in each of a plurality of battery cells, and the power storage unit is provided between electrode terminals of the battery cell and on each charging line of the battery cell to control electrical connection. And a plurality of switches are provided, and the battery management unit senses the voltage of each of the battery cells, and when a voltage imbalance occurs between cells, the battery cell with the lowest voltage is charged more during charging to perform cell balancing. It characterized in that the switching control of the switch so as to be.

In addition, the power storage unit of the present invention is characterized in that a discharge line is formed in each of a plurality of battery cells, and the power storage unit is provided with a plurality of switches that are provided on each discharge line of the battery cell to control electrical connection. The battery management unit is characterized in that when power is supplied to the discharge line, switching the switch so that power required for charging the electric vehicle is supplied.

In addition, the energy storage system of the present invention is characterized in that discharge lines are formed in each of a plurality of battery power storage units, and the energy storage system is provided on each of the discharge lines of the power storage unit to control electrical connection. A switch is provided, and when power is supplied to the discharge line, the energy management unit switches and controls the switch so that power required for charging the electric vehicle is supplied.

In the grid-participating electric vehicle charging system for easy management of a plurality of chargers according to the present invention presented as above, the available chargers are determined and displayed according to the required amount of charge of the electric vehicle that needs to be charged. By displaying, the effect of making it easy to grasp an available charger;

The charging priority is determined so that charging is performed from the charger with a small amount of charge required, but by controlling the charging priority of the charger that corresponds to the first priority among the use priorities to be the lowest, charging of electric vehicles and charging of the charger is efficient. And the effect to be made of;

By replacing and using a connector that meets the charging standard of the electric vehicle, any electric vehicle can be charged;

When the socket fastening part is coupled to the charging socket, the charging standard is automatically checked and the electric vehicle is controlled to be charged accordingly, so that charging the electric vehicle is easier;

By performing the battery cell balancing by the switching control of the battery management unit, the effect of performing the cell balancing more elaborately and quickly;

An effect of reducing energy loss due to power conversion of the power conversion unit by supplying power required for charging the electric vehicle by the switching control of the battery management unit;

The effect of minimizing facility capacity by supplying power required for charging the electric vehicle by switching control of the energy management unit; And

Electric vehicle charging demand prediction system, monitoring interface provided, and a profit model that satisfies various situations and conditions due to interworking with existing communication networks (SK, LG, KT) can provide users with an easy and powerful environment as a power prosumer. You can get a good effect.

1 is a conceptual diagram of a grid participation electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention.
2 is a schematic algorithm of a charging system according to an embodiment of the present invention.
3 is a conceptual diagram showing an example of electrical contact of a charging socket and a socket fastening part of a grid-participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention.
4 is a conceptual diagram showing an example in which electrical contacts of a charging socket and a socket fastening part of a grid-participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention are in contact with each other by magnetic force.
FIG. 5 is a conceptual diagram showing an example of checking a charging standard by providing a protrusion, a groove, and a contact sensing part in a charging socket and a socket fastening part of a grid-participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention.
6 is a conceptual diagram showing an example of a configuration in which a power storage unit of a grid-participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is controlled by switching control of a battery management unit.
7 is a conceptual diagram showing another example of a configuration in which a power storage unit of a grid participation electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is controlled by a switching control of a battery management unit.
8 is a conceptual diagram showing an example of a configuration in which an energy storage system of a grid participation electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is controlled by switching control of an energy management unit.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be.

On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, processes, operations, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the possibility of addition or presence of elements or numbers, processes, operations, components, parts, or combinations thereof is not preliminarily excluded.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Does not.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention. In addition, unless otherwise defined in the technical terms and scientific terms used, they have the meanings commonly understood by those of ordinary skill in the art to which this invention belongs, and the gist of the present invention in the following description and accompanying drawings. Descriptions of known functions and configurations that may be unnecessarily obscure will be omitted. The drawings introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms. In addition, the same reference numbers throughout the specification indicate the same elements. It should be noted that the same components in the drawings are denoted by the same reference numerals wherever possible.

Hereinafter, the present invention will be described in detail with reference to the drawings 1 to 8 showing an embodiment of the present invention.

As shown in Fig. 1, a grid-participating electric vehicle charging system (hereinafter, referred to as a'charging system') for easy management of a plurality of chargers according to an embodiment of the present invention is a charging station, that is, an energy storage system in a charging station. It includes 100 and a power supply unit 200.

The energy storage system 100 includes a plurality of power storage units 110, a battery management unit 120, and a power conversion unit 130; And an energy management unit 140.

The power storage unit 110 includes a plurality of battery cells 111.

The power storage unit 110 can use a secondary battery, and as a type of secondary battery, LiB (lithium ion battery) is attracting the most attention, RFB (Redox flow battery), NaS (sodium sulfur battery), and Super Capacitor, etc.

The power storage unit 110 may be composed of a cell, a module, and a pack. Cells must have a high capacity per unit volume to express maximum performance in a limited space, and require a much longer life than batteries for general mobile devices. In addition, it must have high reliability and stability at low and high temperatures.

Several cells are grouped together and put into a frame in order to be more protected from external shocks such as heat and vibration, and this is called a module.

In addition, a battery pack is formed by adding several of these modules to a battery management system (BMS) and a cooling device.

As for electric vehicle batteries (capacity), 40㎾h, which can run in the mid- to late-200km range, is the main trend. This trend is due to the fact that the weight is about 20% lower than that of an electric vehicle equipped with a large-capacity (60 ㎾h or more) battery, and accordingly, the overall inefficiency and weight reduction of various parts and the ease of performance improvement such as output with a high-efficiency motor and power train. In addition to this trend, it is possible to determine the total capacity and specifications of the battery rack by algorithmizing its own electric vehicle demand forecast.

That is, the power storage unit 110 is a core component constituting a charger, and in the following, any one power storage unit 110 is described in the same manner as one charger, and the charging station referred to in the present invention is within a certain range or at a certain interval. It includes a plurality of power storage units 110, that is, a plurality of chargers.

In addition, the power storage unit 110 is discharged when power is supplied to the electric vehicle, and is controlled by the battery management unit 120 to be charged again by receiving power from the power generation source or the system by the power conversion unit 130. .

The battery management unit 120 is connected to the power storage unit 110 and measures voltage, current, and temperature to diagnose a safety state and a failure, and controls temperature and battery cell balancing.

The battery management unit 120 may monitor the power storage unit 110 and control charging and discharging.

The battery management unit 120 is connected to the power storage unit 110, is connected to a sensor that senses various states, and the voltage of the power storage unit 110 is set to a constant voltage (discharge stop voltage) based on the information sensed from the sensor. Etc.) to keep it from falling below a certain voltage and to prevent charging over a certain voltage, and monitor and control the state of charge (SOC), voltage, current, temperature, etc. of the power storage unit 110. Overall management of the storage unit 110.

Since the characteristics of each battery cell 111 are not the same due to the manufacturing characteristics of the battery cells 111, a voltage difference may occur between batteries connected in parallel due to continuous charging and discharging. Battery balancing is very important to battery life. For example, if a lithium-ion battery is overcharged, the active material of the lithium-ion battery will most likely react with other materials and electrolytes, which could potentially damage the battery itself or even cause an explosion. Also, when the battery is deep-discharged, or continues to be discharged, despite the terminal voltage below a certain threshold called the cutoff voltage, the battery will be short-circuited. There is a risk of changing the battery to an irreversible condition.

In this case, when the voltage of the battery cell 111 does not fall within the balance determination range, the battery management unit 120 may determine that the battery has a voltage imbalance.

For example, the average or deviation of the voltage or state of charge of each battery cell 111 is used as a judgment reference value, and a value between the judgment reference value and a predetermined error tolerance is added or subtracted as a balance judgment range, A battery outside the balance determination range may be determined as the battery cell 111 in which a voltage imbalance occurs.

In addition, the cell balancing of the battery management unit 120 may be characterized in determining a balancing target battery including some or all of the battery cells 111 in which the voltage imbalance is detected.

In other words, not all of the battery cells 111 in which the voltage imbalance is detected are targets for balancing, and when there are battery cells 111 in which the voltage imbalance is detected, a battery to be balanced may be determined. In this case, the balancing target battery may be divided into a battery to be charged and a battery to be discharged. For example, if the average value of each battery voltage is the judgment reference value, 5 batteries are connected in parallel, each battery voltage is 210V, 220V, 220V, 225V, 225V, and the predetermined error tolerance is 6V. , The balance judgment range is 214~226V, and one battery that does not belong to the balance judgment range is 210V. At this time, if one 210V battery and two 225V batteries are connected in parallel, and assuming that there is no current consumed by the resistance, all the batteries become 220V, and all the batteries are included within the balance determination range. Here, the battery to be charged becomes a battery of 210V, and the battery to be discharged becomes a battery of 225V.

The power conversion unit 130 is connected to a power generation source or system, a load, and the power storage unit 110, receives power from a power generation source or system, charges the power storage unit 110, and transfers the charged power to the load side. Send it to you.

The system can be power produced from power generation facilities such as thermal power, hydropower, nuclear power, solar power, solar power, wind power, tidal power, etc., power supplied from transmission/distribution facilities, household power (220V) and industrial power (380V), etc. have.

The power conversion unit 130 is also referred to as including PMS (Power Management System) software.

The power conversion unit 130 serves to convert DC power generated from various power generation sources such as sunlight into AC and control it to a usable state. In addition, both charging and discharging can be controlled, and voltage and frequency can be adjusted according to the purpose.

The power conversion unit 130 can use AC-DC conversion for system power to charge the battery, DC-DC conversion can be used for power conversion of renewable energy such as solar light, and DC-AC conversion to power the system. Can be used when transmitting.

The power conversion unit 130 may enable BMS status monitoring for each unit, control the quality of active power, reactive power, etc., measure and connect voltage, monitor operation status, and Etc. It can control the maximum point of new and renewable power.

The power conversion unit 130 may perform system protection in case of a power outage, control quality according to new renewable power, perform independent power generation using a battery when the system is cut off, and log recording in case of a problem. Can be saved.

It is preferable that organic communication is possible with the battery management unit 120 and the energy management unit 140 to be described later in order to perform this function within the energy storage system 100.

In addition, it is desirable to be designed to allow the user to monitor through HMI (Human Machine Interface).

The energy management unit 140 is connected to the battery management unit 120 and the power conversion unit 300, monitors and analyzes the battery management unit 120 and the power conversion unit 300, and monitors and analyzes the battery management unit 120 and power. Controls the conversion unit 300 and provides charge/discharge information.

The energy management unit 140 is an energy management solution that controls and monitors the operation method of the energy storage system 100 as a control tower of the energy storage system 100, and the energy storage system 100 including the battery management unit 120 It is possible to provide a system capable of monitoring and analyzing the energy storage system 100 in real time through sensors and measurement equipment of, and simultaneously monitoring and controlling through a communication network.

The energy management unit 140 predicts the amount of demand and supply by algorithmizing power consumption pattern information and power price information provided through a power demand prediction element and a deep learning model from simple functions such as charging and discharging time control, etc. It can be responsible for the function of generating, operating and managing the operation plan of the energy storage system.

In addition, the energy management unit 140 determines and displays the available power storage unit 110 according to the required charge amount of the electric vehicle among the plurality of power storage units 110, but according to the current charge amount of the power storage unit 110 The use priority is displayed from the power storage unit 110 with a large amount of charge.

At this time, the electric vehicle wirelessly transmits battery capacity information, that is, charge amount information, and required charge amount, that is, discharge amount information, to one or more of the user terminal or the energy management unit 140.

It will be apparent that the energy management unit 140 may receive battery capacity information of an electric vehicle through a user terminal.

That is, the energy management unit 140 receives battery capacity information of the electric vehicle through the electric vehicle or the user's single unit, and the usable power storage unit 110 according to the required amount of charge of the electric vehicle, that is, can sufficiently charge the electric vehicle. Determining and displaying the power storage unit 110 holding the amount of charge that is present, but prioritizing the use of the user terminal or electric vehicle by determining the priority of use from the power storage unit 110 with a large amount of charge in consideration of the current charge amount. By transmitting and displaying the ranking information, the user can easily use the power storage unit 110.

For example, when an electric vehicle requiring a charge of 50 enters a charging station, the energy management unit 140 stores a power storage unit 110 having a charge amount of 50 or more, which is a charge amount required for the electric vehicle, and the power storage unit 110 with a large amount of charge. ), the user can easily use the charger, that is, the power storage unit 110, by being displayed on the electric vehicle or the user terminal so that the use priority can be determined and confirmed.

At this time, the energy management unit 140 displays the priority of use on the electric vehicle or the user terminal from the power storage unit 110 with a large amount of charge according to the current charge amount of the power storage unit 110, but the current position and the most By determining the power storage unit 110 at a nearby location and determining the priority of use so that the user can use the charger, that is, the power storage unit 110 more easily.

In addition, the energy management unit 140 controls the power conversion unit 130 so that the power storage unit 110 can be continuously charged, and at the same time, the energy management unit 140 is charged so that charging is performed from the power storage unit 110 with a small amount of required charge. The battery management unit 120 is controlled by determining the priority, but the charging priority of the power storage unit 110 corresponding to the first priority among the use priorities is controlled to be the lowest.

That is, the energy management unit 140 may control the battery control unit 120 so that a part of the battery cell 111 of the power storage unit 110 is discharged and partially charged, as will be described later. By distributing the power more efficiently based on the charging priority, it is possible to hold more chargers, that is, the power storage unit 110 that has been charged.

As an example, when the completed charge amount of the power storage unit 110 is 100, the power storage unit 110 charged with 90, the power storage unit 110 charged with 80, and the power storage unit 110 charged with 70 In the case of a charging station that includes, the energy management unit 140 charges the power storage unit 110 charged with 90 at a low speed so that it can be used for charging the first electric vehicle, and stores the electric power charged with the lowest charge amount 70. Since the unit 110 is charged at a slower rate than the power storage unit 110 charged with 80, it is rapidly charged from the power storage unit 110 charged with 80. It is possible to have more rechargeable chargers, that is, the power storage unit 110 so that two cars can be charged.

The energy management unit 140 continuously manages the electric vehicle with a large required amount of charge to be charged through the maximum number of chargers, that is, the power storage unit 110.

In addition, the energy management unit 140 determines the priority of use and the priority of charging except for the power storage unit 110 that is currently being used, that is, the power storage unit 110 that is being discharged for charging the electric vehicle.

This is to minimize the user's misunderstanding and confusion according to the use priority by excluding the power storage unit 110 being used from the use priority and the charging priority, and to determine a more efficient charging priority.

The energy storage system 100 may easily monitor charge/discharge information provided through the energy management unit 140 and control a charging station.

In addition, since it is compatible with a solar power source, it is possible to consider linking the energy storage system 100 with a renewable energy provider.

It goes without saying that the energy storage system 100 can be designed in consideration of an AC low voltage board, a DC distribution board, a reverse power meter battery, a maximum watt hour meter, a meter, and various protection equipment.

The power supply unit 200 is connected to the power conversion unit 300 and the energy management unit 140 and supplies power to the electric vehicle.

The power supply unit 200 is a part connected to the electric vehicle to charge the electric vehicle, and the power supply unit 200 includes a charging socket 210 and a connector 220, and the connector 220 is connected to a socket. Including a part 221 and a charging port fastening part 222, the socket fastening part 221 is electrically connected to the electrical contact of the charging socket 210 according to the electric vehicle charging connector standard of the charging port fastening part 222. It is characterized in that it is formed to be connected.

The charging socket 210 is provided with a plurality of electrical contacts.

The connector 220 has a socket fastening part 221 formed so that one side is connected to the charging socket 210, and a charging port fastening part 222 is formed so that the other side is connected to the electric vehicle charging port.

The connector 220 may be provided with various types of different electrical connection structures of the socket fastening part 221 according to the electric vehicle charging connector standard, and various types of connectors 220 are replaced in one charging socket 210 Can be used.

That is, among the plurality of electrical contacts of the charging socket 210, there are various socket fastening portions 221 that are electrically coupled only to required electrical contacts.

In other words, the electric vehicle may be charged by coupling the connector 220 compatible with the electric vehicle charging port to the charging socket 210.

At this time, it is preferable that the electrical coupling form of the socket fastening part 221 is formed differently according to the type of the charging sphere fastening part 222.

In FIG. 1, the socket fastening part 221 and the charging port fastening part 222 are shown to be connected by a cable, but the present invention is not limited thereto, and the socket fastening part 221 and the charging hole fastening part 222 are formed as one body. Of course, various implementations, such as being combined, are possible.

In addition, in FIG. 1, the connector 220 is shown to be connected to the outside of the energy storage system 100 by a cable, but the present invention is not limited thereto, and the connector 220 is provided outside the energy storage system 100. Of course, various implementations are possible.

In connection with the above, in the present invention, the electric vehicle charging port includes an information providing unit (not shown) that provides information on the battery capacity of the electric vehicle, and the charging connection unit 222 is coupled to the charging port of the electric vehicle. ) Is connected to the electric vehicle charging port and configured to include an information transmission unit 222a for receiving information on the electric vehicle battery capacity from the information providing unit and transmitting the information to the energy management unit 140, the energy management unit 140 Is characterized in that the information on the required charge amount of the electric vehicle is obtained from among the information on the battery capacity of the electric vehicle received from the information transmission unit 222a.

That is, the energy management unit 140 continuously acquires information on the required amount of charge of the electric vehicle among the information on the battery capacity of the electric vehicle being charged, and accordingly, the charging priority of the power storage unit 110 connected to the electric vehicle being charged. When determining the ranking, the charging priority is determined in advance based on the required amount of charge after the power storage unit 110 is discharged, so that the charging of the plurality of power storage units 110 is performed more efficiently and quickly.

At this time, the power storage unit 110 connected to the electric vehicle being charged will be described in detail later, but it is possible to charge part of the battery serie 11 and discharge part of it, so that the charge can be performed simultaneously with discharging, so that the energy The management unit 140 may determine the charging priority in advance in consideration of the amount of discharge, which is the amount of charge required for the electric vehicle of the electric vehicle connected to the electric vehicle being charged, and the amount of charge controlled by the power conversion unit 130. have.

On the other hand, the charging socket 210 of the grid participation electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention includes 3 AC, 2 DC, 1 ground (GND), 1 neutral, It may be characterized by including 1 communication (CP), 1 proximity detection (PD), 2 start/stop, 1 ENABLE, and 2 can communication electrical contacts.

When charging Type 1 (AC single phase), electrical connection of 2 AC, 1 ground (GND), 1 communication (CP) and 1 proximity sensing (PD) is required.

For Type2 (AC 3-phase) charging, electrical connection of 3 AC, 1 Neutral, 1 Ground (GND), 1 Communication (CP) and 1 Proximity Detection (PD) is required.

When charging CCS Type1 (Combined Charging System / DC Combo), electrical connection of 2 AC, 1 ground (GND), 1 communication (CP), 1 proximity sensing (PD) and 2 DC is required.

When charging CCS Type2, electrical connection of 3 AC, 1 neutral, 1 ground (GND), 1 communication (CP), 1 proximity sensing (PD) and 2 DC is required.

When charging DC CHAdeMO, electrical connection of 1 ground (GND), 2 start/stop, 2 DC, 1 ENABLE, 2 CAN communication and 1 PD As you need

It is preferable that the charging socket 210 has various electrical contacts to enable electrical connection to any type of electric vehicle charging standard.

The charging port fastening part 222 of the grid participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is Type 1 (AC single phase), Type 2 (AC 3 phase), DC CHAdeMO, CCS Type 1 (Combined Charging System / DC combo), CCS Type2, Tesla, GB/T (Guobiao Tuijian) may be characterized in that any one or a plurality of

Among the charging methods of electric vehicles, there are largely slow charging and rapid charging.

Slow charging is a method of charging the battery by converting it to DC through an OBC (On Board Charger) using 220V AC power, and the charging time is usually about 4 to 5 hours (based on Ionic electric vehicles).

Quick charging is a method of directly charging a high voltage battery using a DC high voltage without going through an OBC, and the charging time is usually around 25 minutes (based on an Ionic electric vehicle, a 100kW charger).

Slow charging can be largely divided into Type 1 (single-phase) and Type 2 (3-phase) methods.

The fast charging method can be divided into DC Chademo method, CCS Type1 (Combined Charging System / DC combo), and CCS Type2 method.

As shown in Figure 3, the energy management unit 140 of the grid participation electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is connected to the socket fastening portion 221 of the charging socket 210. It may be characterized by detecting a contact point and charging the electric vehicle with a charging standard according to the detected result.

That is, the energy management unit 140 detects the electrical contact of the charging socket 210 electrically connected to the socket fastening unit 221 among the plurality of electrical contacts of the charging socket 210, and a charging standard matching the detected result. It can be controlled to charge the electric vehicle.

In other words, the energy management unit 140 may automatically detect the connector 220 connected to the charging socket 210 by checking whether the charging socket 210 has electrical contact, and automatically control charging accordingly. .

At this time, as a method of checking the electrical contact, the electrical contact of the charging socket 210, such as a method of using a mechanical switch, a method of using various sensors such as a magnetic sensor, a proximity sensor, and a method of measuring electrical characteristics such as resistance measurement. Of course, if you can check, you can use various methods.

The socket fastening part 221 side of the connector 220 of the grid-participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is provided with an RFID chip storing charging standard information, and the charging socket 210 An RFID reader may be provided, and the energy management unit 140 may charge the electric vehicle with a charging standard according to charging standard information of an RFID chip sensed by the RFID reader.

That is, the energy management unit 140 may control to charge the electric vehicle with a charging standard matching the charging standard information checked through the RFID reader of the charging socket 210.

In other words, the energy management unit 140 may wirelessly detect the charging standard information of the RFID chip detected by the RFID reader of the charging socket 210 and automatically control charging accordingly.

As shown in Fig. 4, the charging socket 210 and the socket fastening part 221 of the connector 220 of the grid participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention are respectively magnets. Is provided, and the charging socket 210 and the socket fastening part 221 are electrically contacted by the magnet of the charging socket 210 and the magnet of the socket fastening part 221 contacted by magnetic attraction, The energy management unit 140 may detect an electrical contact connected to the socket fastening portion 221 of the charging socket 210 and charge the electric vehicle according to a charging standard according to the detected result.

That is, a magnet is provided for each of the plurality of electrical contacts of the charging socket 210, a magnet is provided for each electrical contact of the socket fastening part 221, and the charging socket 210 and the connector 220 are fastened. At this time, the electrical contact of the charging socket 210 and the electrical contact of the socket fastening part 221 are electrically contacted by magnetic attraction.

At this time, the energy management unit 140 detects the electrical contact of the charging socket 210 electrically connected to the socket fastening unit 221 among the plurality of electrical contacts of the charging socket 210, and a charging standard matching the detected result. It can be controlled to charge the electric vehicle.

In other words, the energy management unit 140 may automatically detect the connector 220 connected to the charging socket 210 by checking whether the charging socket 210 has electrical contact, and automatically control charging accordingly. .

At this time, as a method of checking the electrical contact, the electrical contact of the charging socket 210, such as a method of using a mechanical switch, a method of using various sensors such as a magnetic sensor, a proximity sensor, and a method of measuring electrical characteristics such as resistance measurement. Of course, if you can check, you can use various methods.

As shown in FIG. 5, the charging socket 210 of the grid-participating electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention has a protrusion or a groove, and the socket of the connector 220 is fastened. The portion 221 is formed with a protrusion or a protrusion corresponding to the protrusion or groove formed in the charging socket 210, the protrusion of the charging socket 210 or the charging socket 210 or the socket fastening part 221 side. A contact sensing unit is installed to detect a point where the groove or the protrusion of the socket fastening unit 221 is in contact with the groove, and the energy management unit 140 charges the electric vehicle according to the charging standard according to the result detected by the contact sensing unit. It can be characterized by that.

That is, the energy management unit 140 may control to charge the electric vehicle with a charging standard matching the result detected by the contact detection unit.

For example, when three grooves are provided in the charging socket 210 and a protrusion is provided in the socket fastening part 221, the socket fastening part 221 provided with a protrusion (one protrusion) that is coupled only to the first groove. ) Is recognized as Type 1, and the socket fastening portion 221 provided with a protrusion (1 protrusion) that is coupled only to the No. 2 groove is recognized as Type 2, and a protrusion (1 protrusion) that is coupled only to the No. Recognizes the socket fastening part 221 as a DC chademo, and recognizes the socket fastening part 221 provided with a protrusion (1 protrusion) that is coupled only to the 1st and 3rd grooves as CCS Type 1, and 2 and 3 It can be applied by recognizing the socket fastening portion 221 provided with a protrusion (one protrusion) that is coupled only to the groove portion as CCS Type2.

In other words, the energy management unit 140 may automatically detect the connector 220 connected to the charging socket 210 as a result of detection from the contact detection unit, and automatically control charging accordingly.

In FIG. 5, an example in which a groove portion is formed in the charging socket 210, a protrusion portion is formed in the socket fastening portion 221, and a contact sensing portion is installed on the charging socket 210 side is illustrated, but the present invention is not limited thereto. , As a matter of course, various implementations such as a protrusion formed in the charging socket 210 and a groove formed in the socket fastening part 221 are of course possible.

As shown in FIG. 6, the power storage unit 110 of the electric vehicle charging system including an integrated connector according to an embodiment of the present invention is characterized in that a charging line is formed in each of a plurality of battery cells 111. The power storage unit 110 is provided with a plurality of switches 112 provided between electrode terminals of the battery cell 111 and each of the charging lines of the battery cell 111 to control electrical connection. When a voltage imbalance occurs between cells by sensing the voltage of each of the battery cells 111, the battery management unit 120 performs more charging in the battery cell 111 having the lowest voltage during charging, so that cell balancing is performed. It may be characterized in that switching control of the switch 112 to be achieved.

In the power storage unit 110, a plurality of battery cells 111 are connected in series, and respective conductors are connected between the battery cells 111 and the battery cells 111, and the battery cells 111 and the battery cells A switch 112 may be provided between 111 and between the terminals of the battery cell 111 and the power storage unit 110.

This is to control the electrical connection so that the battery cell 111 to be charged can be selectively charged with charging power supplied to the terminal of the power storage unit 110.

In this case, the charging power supplied to the terminal is preferably that charging power capable of charging one battery cell 111 is supplied, and the battery cell 111 to be charged can be charged by being connected in parallel with the terminal.

In the above example, each of the battery cells 111 was individually charged, but the present invention is not limited thereto, and a certain number of battery cells 111 are connected in series, and a plurality of groups of battery cells 111 connected in series are It goes without saying that various charging is possible, such as charging in parallel, allowing a certain number of battery cells 111 to be connected in series, and charging the battery cells 111 connected in series in series.

That is, the battery management unit 120 may switch and control the switch 112 to individually charge each of the battery cells 111, and may charge a predetermined number at once.

For example, when cell 1 has the lowest voltage, cell 1 is charged first, and when the voltage of other cells becomes the same as cell 1, other cells with the same voltage as cell 1 are also charged to all cells. You can adjust the cell balancing.

In more detail, when cell 1 is 1.1V, cell 2 is 1.2V, and cell 3 is 1.3V, cell 1 is charged first, and when cell 1 becomes 1.2V, cell 2 is also Charging starts, and when cells 1 and 2 become 1.3V, cell 3 can also start charging.

The example of charging the battery cell 111 having the lowest voltage above was given first, but the present invention is not limited thereto, and various methods such as stopping charging from the fully charged battery cell 111 while charging all cells at the same time. It goes without saying that it is possible to control the switch 112 to perform cell balancing.

When the switch 112 provided between the electrode terminals of the battery cell 111 is cut off (OFF), each battery cell 111 can be individually charged, and a switch provided between the electrode terminals of the battery cell 111 When (112) is short-circuited (ON), the battery cells 111 electrically connected to each other can be integrally charged.

The electrical connection of the power storage unit 110 may include a plurality of battery cells 111 connected to terminals (+ terminals,-terminals) of the power storage unit 110 in a series, parallel, or series-parallel mixed structure.

As shown in Figure 7, the power storage unit 110 of the grid participation electric vehicle charging system equipped with an integrated connector according to an embodiment of the present invention is characterized in that a discharge line is formed in each of a plurality of battery cells 111 The power storage unit 110 is characterized in that a plurality of switches 112 are provided on each discharge line of the battery cell 111 to control electrical connection, and the battery management unit 120 When power is supplied to the discharge line, switching control of the switch 112 is performed so that power required for charging the electric vehicle is supplied.

That is, the battery management unit 120 can switch and control the switch 112 to individually discharge each of the battery cells 111, and it is possible to discharge a certain number at once, and some are charged. And it is also possible to discharge some.

For example, when cell 1 has the highest voltage, cell 1 is discharged first, and when the voltage of other cells becomes the same as cell 1, other cells with the same voltage as cell 1 are also discharged to all cells. You can adjust the cell balancing.

In more detail, when cell 1 is 2.2V, cell 2 is 2.1V, and cell 3 is 2.0V, cell 1 is discharged first, and when cell 1 becomes 2.1V, cell 2 is also Discharge starts, and when cell 1 and cell 2 become 2.0V, cell 3 can also start discharging.

Although the example of discharging the battery cell 111 having the highest voltage first was exemplified, the present invention is not limited thereto. It goes without saying that it is possible to control the switching of the switch 112 so that cell balancing is performed by the method.

When the switch 112 provided between the electrode terminals of the battery cell 111 is cut off (OFF), each battery cell 111 can be discharged individually, and a switch provided between the electrode terminals of the battery cell 111 When (112) is short-circuited (ON), the battery cells 111 electrically connected to each other can be integrally charged.

In addition, some battery cells 111 may be charged and some other battery cells 111 may be discharged.

If charging and discharging are performed at the same time, cell balancing can be performed faster.

When the power storage unit 110 supplies power to a load, the switch 112 may be controlled to be switched to supply discharge power.

In this case, the charging power (eg, 2V) and the discharge power (eg, 12V) may be different from each other. For example, charging power can be switched so that cells requiring charging are connected in parallel, and discharging power can be switched so that cells to supply power to a load are connected in series.

Charging may be performed by selectively selecting a cell, and discharging may be performed at a predetermined voltage.

The power storage unit 110 may be provided with a heater coil, and the battery management unit 120 stores surplus power bypassed due to an overcharge state of the power storage unit 110 to the heater coil. When this power is required (when the temperature inside the battery management unit 120 falls below an appropriate temperature (eg 13°C)), the electrical connection may be controlled to supply power to the heater coil.

The energy storage system 100 may be provided by connecting a plurality of power storage units 110 in a series, parallel, or series-parallel mixed structure.

In this case, the energy storage system 100 is characterized in that a discharge line is formed in each of a plurality of battery power storage units 110, as shown in FIG. 8, the energy storage system 100 is the power storage unit A plurality of switches 112 are provided on each of the discharge lines of 110 to control electrical connection, and the energy management unit 140 is used to charge the electric vehicle when power is supplied to the discharge line. It may be characterized in that switching control of the switch 112 so that necessary power is supplied.

This is to control the electrical connection between the power storage unit 110 according to charging requirements such as slow charging, slow charging, and fast charging.

For rapid charging, it is preferable that the power storage unit 110 or a combination of the power storage unit 110 suitable for the charging voltage of the electric vehicle are connected in parallel and used. However, it is not always necessary to quickly charge, and various charging requirements may arise. Rather than increasing the capacity of the facility to satisfy all these requirements, it can be varied to meet the requirements, but it is desirable to minimize the capacity of the facility. That is, it is desirable to control the serial connection and parallel connection of the power storage unit 110.

The above has been described with reference to a preferred embodiment of the present invention, and is not limited to the above embodiment, and through the above embodiment, a person of ordinary skill in the art to which the present invention belongs does not depart from the gist of the present invention This can be done with various changes in.

100: energy storage system
110: power storage unit
111: battery cell 112: switch
120: battery management unit
130: power conversion unit
140: Energy Management Department
200: power supply
210: charging socket 220: connector
221: socket fastening part 222: charging port fastening part
222a: Information Transmission Department

Claims (14)

A power storage unit 110 including a plurality of battery cells 111;
A battery management unit 120 connected to the power storage unit 110 and measuring voltage, current, and temperature to diagnose a safety state and a failure, and to control temperature and battery cell balancing;
A power conversion unit that is connected to a power generation source or system, a load, and the power storage unit 110, receives power from the power generation source or system, charges the power storage unit 110, and sends the charged power to the load side ( 130); And
It is connected to the battery management unit 120 and the power conversion unit 300, and monitors and analyzes the battery management unit 120 and the power conversion unit 130, and the battery management unit 120 and the power conversion unit 130 An energy management unit 140 that controls and provides charge/discharge information;
Energy storage system 100 comprising a; And
Includes; a power supply unit 200 connected to the power conversion unit 130 and the energy management unit 140 and supplying power to an electric vehicle,
The energy management unit 140
Among the power storage units 110, the available power storage unit 110 is determined and displayed according to the required charging amount of the electric vehicle, but is used from the power storage unit 110 with a large amount of charge according to the current charging amount of the power storage unit 110 Display priority,
Controls the battery management unit 120 by determining a charging priority so that charging is performed from the power storage unit 110 with a small required amount of charge, but charging the power storage unit 110 corresponding to the first priority among the use priorities. Grid participation type electric vehicle charging system for easy management of a number of chargers, characterized in that the control so that the priority is the lowest priority.
The method of claim 1,
The energy management unit 140
A grid-participating electric vehicle charging system for easy management of a number of chargers, characterized in that the use priority and charging priority are determined excluding the power storage unit 110 that is currently being used.
The method of claim 1,
The energy management unit 140
According to the current charging amount of the power storage unit 110, the use priority is displayed from the power storage unit 110 with a large amount of charge,
A grid participation type electric vehicle charging system for easy management of a plurality of chargers, characterized in that determining and displaying the priority of use by determining the power storage unit 110 at the location closest to the current location of the electric vehicle.
The method of claim 1,
The power supply 200 is
A charging socket 210 provided with a plurality of electrical contacts;
Including; a socket fastening part 221 is formed so that one side is connected to the charging socket 210, and a charging fastening part 222 is formed so that the other side is connected to an electric vehicle charging port;
The socket fastening part 221 is
A grid-participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that it is formed to be electrically connected to the electrical contact of the charging socket 210 according to the electric vehicle charging connector standard of the charging port fastening part 222.
The method of claim 4,
The electric vehicle charging port
It is configured to include; an information providing unit that provides information on the battery capacity of the electric vehicle,
The charging fastening part 222 is
And an information transmission unit (222a) connected to the electric vehicle charging port to receive information on the electric vehicle battery capacity from the information providing unit and transmit the information to the energy management unit 140,
The energy management unit 140
A grid-participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that acquiring information on the required amount of charge of the electric vehicle among the information on the electric vehicle battery capacity received from the information transmission unit (222a).
The method of claim 4,
The charging socket 210 is
AC 3, DC 2, Ground (GND) 1, Neutral 1, Communication (CP) 1, Proximity Detection (PD) 1, Start/stop 2, ENABLE 1 A grid-participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that it includes two electrical contacts for dog and can communication.
The method of claim 4,
The charging sphere fastening part 222 is
Type 1 (AC single-phase), Type2 (AC 3-phase), DC CHAdeMO, CCS Type1 (Combined Charging System / DC combo), CCS Type2, Tesla, GB/T (Guobiao Tuijian) one or more A grid-participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that.
The method of claim 4,
The energy management unit 140
A grid-participating electric vehicle charging for easy management of multiple chargers, characterized in that the electric contact connected to the socket fastening part 221 of the charging socket 210 is sensed, and the electric vehicle is charged according to the charging standard according to the detected result. system.
The method of claim 4,
The socket fastening part 221 side of the connector 220 is provided with an RFID chip storing charging standard information,
The charging socket 210 is provided with an RFID reader,
The energy management unit 140
A grid participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that charging an electric vehicle with a charging standard according to the charging standard information of the RFID chip detected by the RFID reader.
The method of claim 4,
Each of the charging socket 210 and the socket fastening portion 221 of the connector 220 is provided with a magnet,
When the magnet of the charging socket 210 and the magnet of the socket fastening part 221 are brought into contact with each other by magnetic attraction, the charging socket 210 and the socket fastening part 221 are in electrical contact,
The energy management unit 140
A grid-participating electric vehicle charging for easy management of multiple chargers, characterized in that the electric contact connected to the socket fastening part 221 of the charging socket 210 is sensed, and the electric vehicle is charged according to the charging standard according to the detected result. system.
The method of claim 4,
The charging socket 210 is formed with a protrusion or a groove, and the socket fastening portion 221 of the connector 220 is formed with a groove or protrusion corresponding to the protrusion or groove formed in the charging socket 210,
A contact sensing part is installed on the charging socket 210 or the socket fastening part 221 side to detect a point where the protruding part or groove of the charging socket 210 and the groove or protruding part of the socket fastening part 221 are in contact,
The energy management unit 140
A grid participation type electric vehicle charging system for easy management of a plurality of chargers, characterized in that charging an electric vehicle according to a charging standard according to a result sensed by the contact sensing unit.
The method of claim 1,
The power storage unit 110
Characterized in that the charging line is formed in each of the plurality of battery cells 111,
The power storage unit 110
A plurality of switches 112 are provided between the electrode terminals of the battery cell 111 and each of the charging lines of the battery cell 111 to control electrical connection,
The battery management unit 120
When the voltage imbalance between cells occurs by sensing the voltage of each of the battery cells 111, the switch 112 is switched to control the switch 112 so that the battery cell 111 with the lowest voltage is charged more during charging to perform cell balancing. A grid-participating electric vehicle charging system for easy management of a plurality of chargers, characterized in that.
The method of claim 12,
The power storage unit 110
A discharge line is formed in each of the plurality of battery cells 111,
The power storage unit 110
A plurality of switches 112 are provided on each discharge line of the battery cell 111 to control electrical connection, and
The battery management unit 120
When supplying power to a discharge line, a grid participation type electric vehicle charging system for easy management of a plurality of chargers, characterized in that switching and controlling the switch 112 so that power required for charging the electric vehicle is supplied.
The method of claim 1,
The energy storage system 100
A discharge line is formed in each of the plurality of battery power storage units 110,
The energy storage system 100
A plurality of switches 112 are provided on each of the discharge lines of the power storage unit 110 to control electrical connection, and
The energy management unit 140
When supplying power to a discharge line, a grid participation type electric vehicle charging system for easy management of a plurality of chargers, characterized in that switching and controlling the switch 112 so that power required for charging the electric vehicle is supplied.

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