CN108667107A - A kind of storage battery equalizing circuit and control method including auxiliary battery - Google Patents
A kind of storage battery equalizing circuit and control method including auxiliary battery Download PDFInfo
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- CN108667107A CN108667107A CN201810780473.6A CN201810780473A CN108667107A CN 108667107 A CN108667107 A CN 108667107A CN 201810780473 A CN201810780473 A CN 201810780473A CN 108667107 A CN108667107 A CN 108667107A
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- 230000005611 electricity Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H02J7/0077—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of storage battery equalizing circuit and control method including auxiliary battery, equalizing circuit includes connection cables, transition terminal box and balance module；Balance module is composed of polylith equilibrium packet, and relay group, DC/DC converter circuits, balanced packet MCU and auxiliary battery are contained in equilibrium packet；Equilibrium packet MCU control relay groups and DC/DC converter circuits carry out charge and discharge to reach balanced purpose with auxiliary battery to the circuit of associated batteries monomer in battery pack.Energy conversion loss of the present invention is small, and can realize that the online high current of accumulator group is balanced, ensure that the safe and stable operation of accumulator group.
Description
Technical field
The present invention relates to accumulator group management of charging and discharging technical fields, more particularly to a kind of accumulator including auxiliary battery
Group equalizing circuit and control method.
Background technology
Chargeable battery plays an important role in modern society's life.Large capacity chargeable battery, especially with lithium member
Element is the lithium system chargeable battery of main material, as the representative of novel chargeable battery technology, in addition in various application scenarios not
Disconnected expansion has also caused all types of researches of technique and wound around its safety in utilization, reliability, capacity utilization etc.
Newly.
In the application of new-energy automobile and large-scale energy-storage system, need up to thousands of up to ten thousand single small-sized lithium electricity
Pond carries out connection in series-parallel use；It also needs large number of chargeable battery being cascaded as voltage class in industrial DC screen, UPS
Higher battery pack.In the fabrication process, inevitably there is consistent sexual deviation in battery.Capacity, internal resistance, ageing rate etc. are respectively joined
Several inconsistencies will make battery pack during charge and discharge use, and each series connection monomer battery voltage occurs and relatively large deviation occurs
The phenomenon that, and since chargeable battery is to the sensibility of overvoltage and under-voltage, it is necessary to often to each battery cell in battery pack into
The equilibrium treatment of row voltage.
Equalization processing schemes common at present are substantially premised on one property of each battery cell in battery pack causes well
, and most of equalization methods efficiency are low, and energy loss is big, and based on offline equilibrium.If certain battery list in battery pack
Body performance is especially better than or is inferior to other battery cells, and existing equalization scheme cannot be satisfied actual needs mostly, will cause to fill
Capacitance does not reach the upper limit, and discharge capacity does not reach the severe situation of lower limit.
Secondly, existing equalization scheme does not consider each battery cell capacity, internal resistance in battery pack all based on balanced voltage
Inconsistency.Voltage is caused to reach lower limit when capacity of the battery pack because of certain battery cell in discharge process is less than normal, internal resistance is bigger than normal
When value, existing equalization scheme is without a kind of timely and effectively energy supplement means, as a result, being embodied in new-energy automobile application
In, the malignant event flame-out in midway by automobile occurs causes certain safety accident and secondary disaster.
It is necessary to provide a kind of new equalization schemes and circuit to solve the above problems as a result,.
Invention content
The technical problem to be solved by the present invention is to：In order to overcome deficiency in the prior art, the present invention to provide a kind of packet
Storage battery equalizing circuit containing auxiliary battery and control method, by relay group, with each battery cell electricity in balancing battery group
For the purpose of pressure, the electric energy in battery pack in associated batteries monomer circuit is absorbed or discharges in real time, so that storage is more when charging
Electric energy, when electric discharge, release more electric energy, reach the maximization of battery utilization rate, and keep in battery pack all battery cells not
It overcharges, Bu Guofang.
Specifically, on the basis of existing battery technology, by certain technological transformation or extension, institute of the present invention is reached
The result stated.Existing battery technology includes substantially two large divisions, is battery pack and battery management system BMS respectively.In general, electric
Pond group is connected in series by a certain number of battery packs, and battery cell series connection series is generally between 6 to 12 in each battery pack, real
When applying the present invention program, it is basic with each battery pack, draws a connection cables, by a transition terminal box, reaches one
A balanced packet.In equilibrium packet, includes balanced packet MCU, communicated with battery management system BMS, to make balance policy.
The present invention solves its technical problem technical solution to be taken：A kind of accumulator group comprising auxiliary battery is balanced
Circuit, including battery management system BMS, battery pack, connection cables, transition terminal box and balance module, the battery management system
It is connected by battery pack port between system BMS and battery pack, to realize communication between the two.
The battery pack includes multiple concatenated battery packs, and the balance module includes multiple balanced packets, the balanced packet
Quantity it is identical as the quantity of battery pack, and the battery pack is corresponded by connection cables and transition terminal box with balanced packet
Connection；That is a battery pack corresponds to a balanced packet.
Include relay group in the described balanced packet, auxiliary battery, isolated controllable booster converter DC/DC1, isolated
Controllable booster converter DC/DC2, isolated booster converter DC/DC3, isolated controllable buck converter DC/DC4, aerial drainage after
Electric appliance JR, power resistor R and balanced packet MCU, converter are all that isolated converter avoids part between each other not altogether
Battery short circuit, the relay group include multiple relays, the quantity of the relay and battery cell in each battery pack
Quantity is identical and connects one to one, and relay group repeat circuit is M, uses J1, J2 ... JM to indicate respectively.
Each battery pack is connected in series by multiple battery cells, and concatenated battery cell string number is M in battery pack, point
It Yong not B1, B2 ... BM expressions.The core number of connection cables is M+1, and each core wire in connection cables one end connects each battery in battery pack
The positive and negative anodes of monomer, when the other end reaches balanced packet, the positive and negative anodes of battery pack are connected to isolated controllable buck converter DC/
The arrival end of DC4, the isolated outlet ends controllable buck converter DC/DC4 connect auxiliary battery, isolated controllable buck converter
When DC/DC4 is enabled, auxiliary battery will be electrically charged.
Specifically, each battery cell corresponds to a double-contact relay in balanced packet in battery pack, passes through connecting line
The anode of cable, each battery cell is connect with relay positive contact outlet end, and negative terminal is connect with relay negative contact outlet end.
Specifically, in relay group each relay positive contact arrival end whole short circuit, negative contact arrival end whole short circuit,
Relay bus is constituted, and positive contact arrival end forms the positive terminal of relay bus, it is total that negative contact arrival end forms relay
The negative pole end of line.
Specifically, relay bus is connected to the contact entrance of the aerial drainage relay JR of double-contact formula, aerial drainage relay JR
Contact outlet connection one power resistor R.
Specifically, relay bus is connected to the outlet end of isolated controllable booster converter DC/DC1, isolated controllable
The arrival end of booster converter DC/DC1 connects auxiliary battery will make auxiliary electricity when isolated controllable booster converter DC/DC1 is enabled
Mode of the electric energy in pond by boosting current limliting is supplied to relay bus；
Specifically, relay bus is connected to the arrival end of isolated controllable booster converter DC/DC2, isolated controllable
The outlet end of booster converter DC/DC2 connects auxiliary battery will make relay when isolated controllable booster converter DC/DC2 is enabled
The mode of electric energy that may be present by boosting current limliting, which is supplied to auxiliary battery, in device bus is stored；
Specifically, auxiliary battery is connected to the arrival end of isolated booster converter DC/DC3, isolated booster converter DC/
The balanced packet MCU power ends of outlet end connection of DC3, as the working power of balanced packet system, main supply object is such as balanced to be wrapped
MCU etc.；The balanced packet MCU and battery management system BMS is attached with communication line.
The anode of the battery pack connects the arrival end anode of isolated controllable buck converter DC/DC4, and battery pack is born
Pole connects the arrival end cathode of isolated controllable buck converter DC/DC4, the isolated controllable buck converter DC/DC4's
Outlet end positive and negative anodes are connect with auxiliary battery plus-negative plate respectively.
Specifically, auxiliary battery is connected to a battery port, auxiliary battery plus-negative plate respectively with two terminals of battery port
Son connection, auxiliary battery is connected in parallel by conducting wire via the battery port of each balanced packet during all equilibriums are wrapped；
Specifically, also contain the Functional Units such as voltage detector component, current measuring element and temperature detecting element in balanced packet
Device, the balanced packet MCU pass through the numbers such as environment temperature in the auxiliary cell voltage of function component acquisition, electric current and balanced packet
According to, and by the communication with battery management system BMS, acquire the voltage parameter and battery pack work shape of battery in battery pack monomer
State；
Specifically, balanced packet MCU is by the collected data of function component, via internal logic operation, to relevant mode
Block and element carry out enabled control, and enabled object includes isolated controllable booster converter DC/DC1, isolated controllable boosting change
Parallel operation DC/DC2, isolated controllable buck converter DC/DC4, each relay coil of relay group and JR relay coils；Every
Booster converter DC/DC1 controllable from formula is for balanced when discharging, and isolated controllable booster converter DC/DC2 is for equal when charging
Weighing apparatus, JR is for later stage equilibrium of charging, and the voltage differences of battery pack are equal when isolated controllable buck converter DC/DC4 is used to charge
Weighing apparatus, equilibrium packet MCU control isolated controllable booster converter DC/DC1, isolated controllable by enabled mode and isolating means
Each relay and aerial drainage relay in booster converter DC/DC2, isolated controllable buck converter DC/DC4, relay group
Whether JR is in running order.The prime of circuit and the electric current of rear class is set to be mutually isolated by isolating means, two-stage coil
Between without altogether, prevent short circuit, improve reliability, optocoupler progress is usually used in equilibrium packet MCU control related function modules
Isolation.
Specifically, the relay is either the coil relay with mechanical contact, can also be by electronic switch
The solid-state relay of composition or the other structures relay of same principle；
Specifically, if the quantity of battery in battery pack packet is N, then corresponding balanced packet quantity is similarly N, all balanced packets
In auxiliary battery carried out by battery port it is in parallel, and regarding the optional dilatation battery of the additional pool-size in parallel of actual demand.
Specifically, any moment only allows to be closed the one relay of single balanced packet repeat circuit group, when have two after
When electric appliance is attracted simultaneously, battery short circuit accident in part in battery pack will be caused.
Specifically, its basic functional principle of equalizing circuit of the present invention is：
When charging, each balanced packet MCU is by collected data, to determine that isolated controllable decompression becomes in each balanced packet
Parallel operation DC/DC4 it is enabled whether, to eliminate the voltage differences of each battery pack；To determine isolated controllable booster converter DC/
The enabled or aerial drainage relay JR's of DC2 is enabled, and relay group repeat circuit it is enabled whether, to eliminate single battery
The voltage differences of battery cell in packet；
Upon discharging, each balanced packet MCU is by collected data, to determine isolated controllable booster converter DC/DC1
It is enabled, plus relay group repeat circuit it is enabled whether, the battery cell relatively low to associated voltage in battery pack progress
Supplement operating current in real time achievees the purpose that extend its working time；
When battery pack is not at charge and discharge state, equal balance system does not work.
The beneficial effects of the invention are as follows：
(1) super-charge super-discharge of battery in battery pack monomer is prevented.When using assembled battery total voltage as management of charging and discharging
Standard parameter, when charging, even if assembled battery total voltage does not rise to rechargeable standard voltage, due to each battery cell voltage
Inconsistency, the voltage that may have percentage of batteries monomer has reached or is more than its battery cell upper voltage limit, to cause electricity
Pond monomer overcharges phenomenon；Upon discharging, even if assembled battery total voltage does not drop to electric discharge normal voltage, may have part electricity
Pond monomer voltage has reached or is less than its battery cell lower voltage limit, and phenomenon is put to cause battery cell to cross.Using the present invention
Technical solution, can be while charge and discharge, and real-time online carries out equilibrium, and the battery cell for effectively preventing battery pack overcharged
It puts.
(2) battery capacity utilization rate is improved.The technology of the present invention real time equaliser electric current is big, and energy transfer rat is high,
Each battery cell voltage basic synchronization in battery pack can be allowed to reach its voltage upper and lower limit when battery set charge/discharge, theory powers on
Pond pool-size utilization rate is up to 100%, if plus the capacity (extendible capacity) of auxiliary battery, battery pack usage factor can be more than 1.0,
Equal balance system plays compatibilization effect.
(3) energy conversion loss is reduced.The technology of the present invention is balanced online when being charge and discharge, using shunting and confluence
Method.Balance module absorbs the charging current in associated batteries monomer in battery pack when charging, balance module supply when electric discharge
Electric current is directly supplied to load.When charge and discharge in balance module auxiliary battery and battery in battery pack monomer substantially without direct energy
Conversion, to reduce the loss generated in energy conversion.
(4) master battery pack service life is extended.Auxiliary battery and associated batteries monomer in master battery pack in balance module
Parallel connection confluence shunting working method, can make associated batteries monomer in master battery pack that carrying will not occur in charge and discharge process
Row, thermal runaway is small, to ensure that the operation stability of master battery pack and extend the service life of associated batteries monomer.
(5) battery combination difficulty is reduced.More more battery packs simultaneously of string match clock synchronization, normal condition in battery cell combination
Under, it needs to carry out necessary survey appearance survey resistance process, trouble is time-consuming.After the art of this patent, since balance module can conduct
The addend or subtrahend of any one battery cell in battery pack, without the group refined to battery in battery pack monomer
Apolegamy is closed, production time and the difficulty of battery pack are reduced.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the basic composition that battery pack is connect with balance module.
Fig. 2 is the basic circuit structure figure of single battery packet and single balanced packet.
Fig. 3 is the basic input/output structure figure of balanced packet MCU in single balanced packet.
Fig. 4 is auxiliary battery and dilatation cell parallel connection diagram in entire balance module.
In figure：1. battery pack, 2. balance modules, 21. battery packs, 22. balanced packets, 23. auxiliary batteries, 31. enabled switching groups.
Specific implementation mode
Presently in connection with attached drawing, the present invention is described in detail.This figure is the schematic diagram of simplification, is only illustrated in a schematic way
The basic structure of the present invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, a kind of storage battery equalizing circuit including auxiliary battery of the present invention, including battery pack 1, connecting line
Cable, transition terminal box, balance module 2 and battery management system BMS.Wherein, battery pack 1, can be with because concatenated series is more
It is artificially divided into N number of battery pack, battery pack 1, battery pack 2 ... battery pack N is used to indicate respectively.Specifically, with each battery
Packet is unit, draws a connection cables, if connection cables 1, connection cables 2 ... are so that connection cables N.Every connection cables
It is connected to a corresponding equilibrium to wrap, as balanced packet 1, equilibrium wrap 2 ... down to balanced packet N.To be easy to maintain, connection cables enter
Pass through a transition terminal box before equilibrium packet.Specifically, all equilibrium package synthesizes balance module 2.Specifically, battery
Management system BMS is connect with the battery pack port of battery pack 1, with the balanced packet MCU direct communications of each balanced packet.
As shown in Fig. 2, by the electrical schematic diagram of a specific battery pack 21 and balanced packet 22, to illustrate equalizing circuit
Basic functional principle.In figure, it is assumed that in battery pack 21 concatenated battery cell string number be M, then battery pack 21 by battery cell B1,
B2 ... is connected in series down to BM.From the positive and negative lead wires to equilibrium packet 22 of all batteries monomer, by figure it is found that such as battery strings
Connection series is M, then the radical of connecting line is M+1.Wherein, the negative terminal of the anode of battery cell B1 and battery cell BM pass through connection
Line enters the isolated controllable buck converter DC/DC4 arrival ends in balanced packet 22, isolated controllable buck converter DC/DC4
When enabled, auxiliary battery 23 will be electrically charged.
Specifically, in battery pack 21 battery cell B1, B2 ... so that BM and 22 repeat circuit J1, J2 ... of balanced packet with
It corresponds, is connect with relay contact outlet anode per battery positive, battery negative terminal exports negative terminal with relay contact to JM
Connection.Described relay J1, J2 ... form relay group, the contact entrance anode of relay described in relay group down to JM
Whole short circuits, the same short circuit of negative terminal constitute relay bus.
Specifically, relay bus constitutes aerial drainage circuit by aerial drainage relay JR one power resistor R of contact portion.
Specifically, relay bus is by the isolated controllable auxiliary battery 23 of booster converter DC/DC1 connections, it is isolated can
When control booster converter DC/DC1 is enabled, auxiliary battery 23 will be bus-powered to relay；
Specifically, relay bus is by the isolated controllable auxiliary battery 23 of booster converter DC/DC2 connections, it is isolated can
When control booster converter DC/DC2 is enabled, electric energy that may be present will be such that auxiliary battery 23 is electrically charged in relay bus；
Specifically, auxiliary battery 23 is formed in parallel by the battery cell of more same performances, and amount of capacity regards battery pack 1
Depending on capacity and operating mode.Auxiliary battery 23 in addition to isolated controllable booster converter DC/DC1, isolated controllable booster converter
DC/DC2, isolated controllable buck converter DC/DC4 connections are outer, are additionally coupled to isolated booster converter DC/DC3, isolated
Booster converter DC/DC3 is specifically such as balanced to wrap MCU to supply whole power units in equilibrium packet 22.
Specifically, 23 positive and negative polarities of auxiliary battery are also connected with two external connecting terminals, constitute battery port.
Specifically, balanced packet MCU is connect with the battery management system BMS of battery pack 1 by communication line in balanced packet 22, to adopt
Related data needed for collection.
In Fig. 3, the basic input signal of each balanced packet MCU connections has:Voltage detecting, current detecting, temperature detection.Its
In, voltage detecting either the simple voltage for only detecting auxiliary battery 23, can also by battery pack 21 come cable on examine
Survey the voltage of battery cell in battery pack 21.It is theoretically balanced when including the voltage detecting of battery cell in battery pack 21
Packet 22 can be separated from the communication with battery pack BMS, carry out autonomous balance policy.Wherein, current detecting mainly detects balanced
When size of current, prevent overcurrent from causing the damage to the elements device such as relay.Wherein, temperature detection refers to measurement equilibrium packet 22
Interior mean temperature will stop balanced or reduce the balanced frequency when the temperature is excessively high.
In Fig. 3, each member device is controlled by each enabled switch per the balanced basic output for wrapping balanced packet MCU connections in 22
Part specifically includes：Isolated controllable booster converter DC/DC1, isolated controllable booster converter DC/DC2, it is isolated controllable
Buck converter DC/DC4, J1, J2 ... are so that each relay coils of JM and aerial drainage relay JR coils.Each enabled switching group
Synthesis enables switching group 31.
In Fig. 4, the parallel of auxiliary battery 23 in each balanced packet 22 in balance module 2 is simply illustrated.Specifically,
Equilibrium packet 1, balanced packet 2, by the connecting terminal of battery port, are connected in parallel, are so able to down to auxiliary battery 23 in balanced packet N
The supply of energy when more ensureing balanced, it is therefore prevented that certain 22 correspondence battery pack 21 of equilibrium packet is individually equal when needing more balanced electric energy
The problem of auxiliary battery 23 energy deficiency in weighing apparatus packet.More, if battery pack 1 needs more frequently after running the regular hour
When ground carries out balanced, additional energy supplement is given by one group of dilatation battery in parallel.
A kind of control method of storage battery equalizing circuit comprising auxiliary battery of the present invention, specific implementation method
One of be：
1, further include charge balancing and equalization discharge, equilibrium packet 22 is in charge and discharge former a period of time in single equilibrium packet 22
Carving at most only allows a certain relay in closing relay group, and enables isolated controllable booster converter DC/DC1 or isolation
Formula controllable booster converter DC/DC2 or aerial drainage relay JR, to be carried out to electric current in the corresponding battery cell circuit of the relay
Confluence or shunting；
The control object that the control method of equilibrium 22 charge balancings of packet is related to includes relay group, isolated controllable boosting change
Parallel operation DC/DC2, aerial drainage relay JR, control logic are as follows：
(1) when battery pack 1 charges, equilibrium wraps in MCU and sets a cycle 120 seconds, pulsewidth pulse in 30 seconds, during pulsewidth
Other periods for equilibrium enabled phase, period are waiting period；Waiting time, equilibrium packet MCU acquire it and correspond in battery pack 21 entirely
The voltage value of portion's battery cell chooses the highest battery cell of voltage, makes label, when pulsewidth carrys out interim, such as 23 electricity of auxiliary battery
Pressure does not reach the upper limit, and temperature does not reach alarm limit in equilibrium packet 22, then enables the corresponding relay group relay of the battery cell, and make
Energy converter DC/DC2, the highest battery cell both ends charging current of voltage will shunt a part and enter auxiliary battery 23, pulsewidth knot
Beam, all enabled to stop, equilibrium packet MCU acquires the voltage value of all batteries monomer in corresponding battery pack 21 again, makes next
A charge balancing strategy；
(2) when battery pack 1 charges, in the cycle implementation procedure of charge balancing, if 23 voltage of auxiliary battery has reached the upper limit,
Temperature does not reach alarm limit in weighing apparatus packet 22, then enabled object is changed to by isolated controllable booster converter DC/DC2 in balance policy
Aerial drainage relay JR；
(3) when battery pack 1 charges, in the cycle implementation procedure of charge balancing, if temperature reaches alarm in balanced packet 22
Limit then stops a charge balancing strategy, is detected again in next cycle；
The control object that the control method of equilibrium 22 equalization discharges of packet is related to includes relay group, isolated controllable boosting change
Parallel operation DC/DC1, control logic are as follows：
(1) when battery pack 1 is discharged, if 23 voltage value of auxiliary battery is higher than the 40% of work range, one is set in equilibrium packet MCU
60 seconds a periods, pulsewidth pulse in 30 seconds are the balanced enabled phase during pulsewidth, and other periods in period are waiting period；Waiting period
Between, equilibrium packet MCU acquires it and corresponds to the voltage value of all batteries monomer in battery pack 21, chooses the minimum battery cell of voltage,
Label is made, when pulsewidth is come temporarily, wrapping temperature in 22 such as equilibrium does not reach alarm limit, then the corresponding relay of the enabled battery cell
Group relay, and isolated controllable booster converter DC/DC1 is enabled, the minimum battery cell both ends discharge current of voltage will be by
Auxiliary battery converges into a part, and pulsewidth terminates, all enabled to stop, and equilibrium packet MCU is acquired in corresponding battery pack 21 all again
The voltage value of battery cell makes next equalization discharge strategy；
(2) when battery pack 1 is discharged, in the cycle implementation procedure of equalization discharge, if 23 voltage of auxiliary battery has been less than work
The 40% of range, and balanced packet MCU acquires it and corresponds to the voltage value of all batteries monomer in battery pack 21 and is not below its workload
The 10% of journey then stops an equalization discharge strategy, is detected again in next cycle；
(3) when battery pack 1 is discharged, in the cycle implementation procedure of equalization discharge, if 23 voltage of auxiliary battery has been less than work
The 40% of range, and balanced packet MCU acquires the voltage value that it corresponds to all batteries monomer in battery pack 21 and has less than its workload
The 10% of journey, then the minimum battery cell of voltage is chosen, label is made, when pulsewidth carrys out interim, equalization discharge plan of execution
Slightly, until next cycle；
(4) when battery pack 1 is discharged, in the cycle implementation procedure of equalization discharge, if temperature reaches alarm in balanced packet 22
Limit then stops an equalization discharge strategy, is detected again in next cycle；
(5) when battery pack 1 is discharged, if 23 voltage of auxiliary battery is less than the 10% of its work range, equalization discharge is terminated；
2, include the charge balancing control method to each battery pack 21, balance module 2 is in battery pack 1 in balance module 2
Each balanced packet MCU wraps 22 intervals by the voltage value of each battery pack 21 in acquisition comparative cell group 1 to control each equilibrium when charging
The enabled state of buck converter DC/DC4 controllable from formula, control logic are as follows：
When battery pack 1 charges, a cycle is set 120 seconds in each balanced packet MCU of balance module 2, pulsewidth pulse in 60 seconds,
It is the Balance route phase during pulsewidth, other periods in period are waiting period, waiting time, each balanced packet MCU and battery management system
System BMS communications collect 21 voltage value of each battery pack in battery pack 1, and each balanced packet MCU compares this equilibrium packet 22 and corresponds to battery pack
The height of 21 voltages and 21 voltage of other battery packs,
(1) if 23 voltage of auxiliary battery is less than the 60% of its work range, this equilibrium wraps 22 internally separated types and is controllably depressured change
Parallel operation DC/DC4 is normally enable bit, and auxiliary battery 23 will be electrically charged, if this equilibrium packet 22 corresponds to battery pack in the waiting period in period
21 voltages are detected as minimum, then stopping this equilibrium packet controllable buck converter DC/DC4 of 22 internally separated types during pulsewidth makes
Can, restore enabled at the end of pulsewidth, into next cycle；
(2) if 23 voltage of auxiliary battery is higher than the 60% of its work range, this equilibrium wraps 22 internally separated types and is controllably depressured change
Parallel operation DC/DC4 is normally to stop enabling, if 22 correspondence 21 voltages of battery pack of this equilibrium packet are detected as most in the waiting period in period
Height then enables this equilibrium and wraps the controllable buck converter DC/DC4 of 22 internally separated types during pulsewidth, auxiliary battery 23 will be electrically charged, pulsewidth
At the end of restore to stop it is enabled, into next cycle；
(3) if it is exception that 23 voltage of auxiliary battery, which is higher than temperature detection in the 90% of its work range, or balanced packet 22, then
Stop this equilibrium at any time and wraps the enabled of the controllable buck converter DC/DC4 of 22 internally separated types, so that enter next cycle；If inspection
Battery pack 1 is measured not in charged state, stops the enabled of isolated controllable buck converter DC/DC4 at any time, it is defeated to stop pulse
Go out.
It is enlightenment, through the above description, relevant staff with above-mentioned desirable embodiment according to the present invention
Various changes and amendments can be carried out in without departing from the scope of the present invention completely.The technical scope of this invention is not
The content being confined on specification, it is necessary to which its technical scope is determined according to right.
Claims (3)
1. a kind of storage battery equalizing circuit including auxiliary battery, it is characterised in that：Including battery management system BMS, battery pack,
Connection cables, transition terminal box and balance module pass through battery pack port between the battery management system BMS and battery pack
Connection；
The battery pack includes multiple concatenated battery packs, and the balance module includes multiple balanced packets, the number of the balanced packet
Amount is identical as the quantity of battery pack, and the battery pack is corresponded with balanced packet by connection cables and transition terminal box and connected
It connects；
Each battery pack is connected in series by multiple battery cells, and the equilibrium includes relay group, auxiliary battery, isolated
It is controllable booster converter DC/DC1, isolated controllable booster converter DC/DC2, isolated booster converter DC/DC3, isolated
Controllable buck converter DC/DC4, aerial drainage relay JR, power resistor R and balanced packet MCU, the relay group includes multiple
Relay, the quantity of the relay is identical as the quantity of battery cell in each battery pack and connects one to one, Mei Ge electricity
The positive and negative anodes of pond monomer are connect with the positive negative contact outlet end of a relay respectively, and all relay positive contact arrival ends are all short
The positive terminal for constituting relay bus is connect, and negative contact arrival end whole short circuit constitutes the negative pole end of relay bus；
The relay bus is separately connected the isolated outlet ends controllable booster converter DC/DC1, isolated controllable boosting inverter
Device DC/DC2 arrival ends and the contacts aerial drainage relay JR arrival end；The contacts the aerial drainage relay JR outlet end connection power electricity
Hinder R；The arrival end of the isolated controllable booster converter DC/DC1 is connect with auxiliary battery plus-negative plate；The isolated controllable liter
The outlet end of buckling parallel operation DC/DC2 is connect with auxiliary battery plus-negative plate；
The auxiliary battery connects the arrival end of isolated booster converter DC/DC3, the outlet of isolated booster converter DC/DC3
The balanced packet MCU power ends of end connection, the balanced packet MCU and battery management system BMS are attached with communication line；
The anode of the battery pack connects the arrival end anode of isolated controllable buck converter DC/DC4, and the cathode of battery pack connects
Connect the arrival end cathode of isolated controllable buck converter DC/DC4, the outlet of the isolated controllable buck converter DC/DC4
Proper cathode is connect with auxiliary battery plus-negative plate respectively；
The auxiliary battery plus-negative plate connects battery port, the battery port and the battery port of other balanced packets by conducting wire into
Row is connected in parallel, then one group of dilatation battery in parallel；
The balanced packet MCU is used for through environment in the auxiliary cell voltage of function component acquisition, charging and discharging currents and balanced packet
Temperature, and communicated with battery management system BMS by communication line, acquire the voltage parameter and battery pack of battery in battery pack monomer
Working condition；
The balanced packet MCU is additionally operable to carry out logical operation by the data of acquisition, obtains handling result, come control it is isolated can
Control booster converter DC/DC1, isolated controllable booster converter DC/DC2, isolated controllable buck converter DC/DC4, relay
Whether each relay and aerial drainage relay JR are in running order in device group.
2. a kind of control method of the storage battery equalizing circuit comprising auxiliary battery, it is characterised in that：Including described in claim 1
Equalizing circuit further include charge balancing and equalization discharge in single equilibrium packet, any moment is most in charge and discharge for equilibrium packet
More allow to be closed a relay in balanced packet relay group, and enable isolated controllable booster converter DC/DC1 or isolation
Formula controllable booster converter DC/DC2 or aerial drainage relay JR, to be carried out to electric current in the corresponding battery cell circuit of the relay
Confluence or shunting；
The control object that the control method of balanced packet charge balancing is related to includes relay group, isolated controllable booster converter
DC/DC2, aerial drainage relay JR, control logic are as follows：
（1）When battery pack charges, equilibrium wraps in MCU and sets a cycle 120 seconds, pulsewidth pulse in 30 seconds, is equal during pulsewidth
Weighing apparatus enables the phase, and other periods in period are waiting period；Waiting time, equilibrium packet MCU acquire it and correspond to all batteries in battery pack
The voltage value of monomer chooses the highest battery cell of voltage, makes label, when the phase enabled in equilibrium, such as auxiliary cell voltage
Do not reach the upper limit, temperature does not reach alarm limit in equilibrium packet, then enables the battery cell corresponding relay group relay, and it is enabled every
Booster converter DC/DC2 controllable from formula, the highest battery cell both ends charging current of voltage will shunt a part and enter auxiliary electricity
Pond, pulsewidth terminate, all enabled to stop, and equilibrium packet MCU acquires the voltage value of all batteries monomer in corresponding battery pack again, makees
Go out next charge balancing strategy；
（2）When battery pack charges, in the cycle implementation procedure of charge balancing, if auxiliary cell voltage has reached the upper limit, in equilibrium packet
Temperature does not reach alarm limit, then enabled object is changed to aerial drainage relay by isolated controllable booster converter DC/DC2 in balance policy
Device JR；
（3）When battery pack charges, in the cycle implementation procedure of charge balancing, if temperature reaches alarm limit in balanced packet, in
An only charge balancing strategy detects again in next cycle；
The control object that the control method of balanced packet equalization discharge is related to includes relay group, isolated controllable booster converter
DC/DC1, control logic are as follows：
（1）When battery power discharge, if auxiliary battery voltage value is higher than the 40% of work range, a cycle 60 is set in equilibrium packet MCU
Second, pulsewidth pulse in 30 seconds is the balanced enabled phase during pulsewidth, and other periods in period are waiting period；Waiting time, equilibrium packet
MCU acquires it and corresponds to the voltage value of all batteries monomer in battery pack, chooses the minimum battery cell of voltage, makes label, when
Pulsewidth is come temporarily, and temperature then enables the corresponding relay group relay of the battery cell, and make not up to alarm limit in such as balanced packet
The isolated controllable booster converter DC/DC1 of energy, the minimum battery cell both ends discharge current of voltage will be converged by auxiliary battery into one
Part, pulsewidth terminate, all enabled to stop, and equilibrium packet MCU acquires the voltage value of all batteries monomer in corresponding battery pack again,
Make next equalization discharge strategy；
（2）When battery power discharge, in the cycle implementation procedure of equalization discharge, if auxiliary cell voltage has been less than work range
40%, and balanced packet MCU acquires it and corresponds to the voltage value of all batteries monomer in battery pack and is not below the 10% of its work range, then
Stop an equalization discharge strategy, is detected again in next cycle；
（3）When battery power discharge, in the cycle implementation procedure of equalization discharge, if auxiliary cell voltage has been less than work range
40%, and balanced packet MCU acquires it and corresponds to the voltage value of all batteries monomer in battery pack 10% less than its work range,
The minimum battery cell of voltage is then chosen, label is made, when pulsewidth carrys out interim, equalization discharge strategy of execution, until next
A cycle；
（4）When battery power discharge, in the cycle implementation procedure of equalization discharge, if temperature reaches alarm limit in balanced packet, in
An only equalization discharge strategy detects again in next cycle；
（5）When battery power discharge, if auxiliary cell voltage is less than the 10% of its work range, equalization discharge is terminated.
3. including the control method of the storage battery equalizing circuit of auxiliary battery as claimed in claim 2, it is characterised in that：Including
Equalizing circuit described in claim 1 further includes the charge balancing control method to each battery pack in balance module, balanced
Voltage values of the MCU by each battery pack in acquisition comparative cell group is wrapped in module each equilibrium when battery pack charges, each equal to control
The enabled state of isolated controllable buck converter DC/DC4, control logic are as follows in weighing apparatus packet：
When battery pack charges, a cycle is set 120 seconds in each balanced packet MCU of balance module, pulsewidth pulse in 60 seconds, the pulsewidth phase
Between be the Balance route phase, other periods in period are waiting period；Waiting time, each balanced packet MCU and battery management system BMS are logical
Letter collects each battery pack voltage value in battery pack, and each balanced packet MCU compares the corresponding battery pack voltage of this equilibrium packet and other electricity
The height of pond packet voltage；
（1）If auxiliary cell voltage is less than the 60% of its work range, the controllable buck converter DC/DC4 of this equilibrium packet internally separated type
It is normally enable bit, auxiliary battery will be electrically charged, if the corresponding battery pack voltage of this equilibrium packet is detected as most in the waiting period in period
It is low, then stop the enabled of the controllable buck converter DC/DC4 of this equilibrium packet internally separated type during pulsewidth, restores to make at the end of pulsewidth
Can, into next cycle；
（2）If auxiliary cell voltage is higher than the 60% of its work range, the controllable buck converter DC/DC4 of this equilibrium packet internally separated type
It is normal enabled to stop, if this equilibrium packet corresponds to battery pack voltage and is detected as highest in the waiting period in period, during pulsewidth
This equilibrium controllable buck converter DC/DC4 of packet internally separated type is enabled, auxiliary battery will be electrically charged, and restore to stop making at the end of pulsewidth
Can, into next cycle；
（3）If it is abnormal that auxiliary cell voltage, which is higher than temperature detection in the 90% of its work range, or balanced packet, then stop at any time
The controllable buck converter DC/DC4's of this equilibrium packet internally separated type is enabled, so that enter next cycle；If detecting battery pack
Not in charged state, stop the enabled of isolated controllable buck converter DC/DC4 at any time, stops pulse output.
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| CN201810780473.6A CN108667107A (en) | 2018-07-17 | 2018-07-17 | A kind of storage battery equalizing circuit and control method including auxiliary battery |
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| CN201810780473.6A CN108667107A (en) | 2018-07-17 | 2018-07-17 | A kind of storage battery equalizing circuit and control method including auxiliary battery |
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