CN208142855U - A kind of battery management system and battery pack - Google Patents
A kind of battery management system and battery pack Download PDFInfo
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- CN208142855U CN208142855U CN201820330266.6U CN201820330266U CN208142855U CN 208142855 U CN208142855 U CN 208142855U CN 201820330266 U CN201820330266 U CN 201820330266U CN 208142855 U CN208142855 U CN 208142855U
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- battery
- master control
- battery pack
- management system
- control set
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Abstract
The utility model provides a kind of battery management system and battery pack, battery management system includes master control set, battery information acquisition device, charging and discharging circuit, preliminary filling circuit, charging and discharging circuit is in parallel with preliminary filling circuit, string is equipped with charge and discharge electric contactor in charging and discharging circuit, master control set control connection charge and discharge electric contactor, battery information acquisition device and master control set communicate to connect, and preliminary filling circuit is connect with master control set.Battery pack is made of 9 battery module parallel connections, each battery information acquisition device acquires the information of each battery module and is sent to master control set, battery module information, the information progress integrated treatment to 9 battery modules control charging and discharging circuit and preliminary filling circuit behavior to master control set based on the received.The unbalanced bring circulation risk of voltage between battery module is realized, each battery module is effectively managed, improves the safety management function of battery pack, extend battery pack service life, reduce operating cost, improve the reliability of battery pack.
Description
Technical field
The utility model belongs to battery management system technical field, in particular to a kind of battery management system and battery pack.
Background technique
Currently used network system is to include various generating equipments, transmission and distribution networks, electrical equipment and energy storage device
Based on, there is a problem of in real electricity consumption one it is serious, be in the peak of electricity consumption daytime, electricity consumption deliverability is seriously not
Foot, constrains industrial expansion；The period in evening is the low ebb of electricity consumption, and extra electric energy cannot get good utilization, cause
The serious wasting of resources produces large-scale independently-powered energy storage base station, i.e., produces distributed power generation to solve the above-mentioned problems
Raw electric power stores, and inputs when power grid is carried out using or low power consumption and charge to energy storage device, in electricity consumption
It discharges when peak, supplies electric energy to outside under specific circumstances, generally the most commonly used is using energy-storage battery by the way of, such as public affairs
Announcement number is " CN206742868U ", and the Chinese patent of entitled " a kind of intelligence energy storage grid management systems " is provided using electricity
Scheme of the pond group as energy-storage system.
But with the development of large-scale independent energy storage base station, the higher battery pack demand of gross energy is growing, Er Qiejian
In the particular/special requirement of energy-storage battery group, the power supply of whole system cannot be cut off because a string of batteries are problematic, it can not will be electric
It connects after pond group is first in parallel, so mode in parallel after first connecting can only be selected.But the work due to battery in process
Skill and material is inconsistent will lead in charge and discharge process, or go wrong in a mould group and it is individually put into again again
When system, circulation can be generated between each parallel branch, thus can cause battery-heating, accelerate the aging speed of battery, no
Conducive to the recycling of battery, the battery balanced management module in above-mentioned patent manages multiple battery packs, balanced management module control
Make whether each battery pack accesses circuit, balanced management module is also connected with charging module, and controls every in charging module
One charger also can control the length in charging time to carry out charging to some battery pack or disconnect from charge mode
It is short, the equalizaing charge control of each battery pack is realized, since each battery pack is equipped with a charger, balanced management
Module need to control the equilibrium between each charger realization battery pack, so the mode structure that the patent provides is more complicated, first device
Part is relatively more, causes increased costs, and the quantity for the charger connecting with battery pack is more, so the balanced effect between battery pack
Fruit may be not good enough, keeps the balanced reliability between battery pack low.
Utility model content
The purpose of this utility model is to provide a kind of battery management system and battery packs, electric in the prior art for solving
The pond management system problem that structure is complicated and balanced reliability is low.
To achieve the above object, the utility model provides a kind of battery management system, including master control set, is used for and electricity
It is the battery information acquisition device of pond group connection, the charging and discharging circuit for being connect with battery pack, pre- for what is connect with battery pack
Circuit is filled, the charging and discharging circuit is in parallel with the preliminary filling circuit, and string is equipped with each electricity with battery pack in the charging and discharging circuit
The charge and discharge electric contactor that pond module is correspondingly connected with, the master control set control connect each charge and discharge electric contactor, the battery information
Acquisition device and the master control set communicate to connect, and the preliminary filling circuit is connect with the master control set.
Further, string is equipped with preliminary filling resistance and preliminary filling contactor on the preliminary filling circuit, and the master control set control connects
Connect the preliminary filling contactor.
Further, the battery information acquisition device includes temperature collecting cell.
Further, the battery information acquisition device further includes voltage acquisition unit.
Further, the battery information acquisition device further includes current acquisition unit.
Further, the battery management system further includes the DC/DC converter for connecting with battery pack, the DC/
DC converter is for being electrically connected the master control set and battery information acquisition device.
Further, the battery information acquisition device and the master control set are communicated to connect by CAN bus.
Further, the battery management system further includes startup power supply.
Further, the startup power supply is 12V battery feed.
The utility model additionally provides a kind of battery pack, including battery management system and at least two battery modules, described
Battery management system includes master control set, the charging and discharging circuit connecting with battery pack, the preliminary filling circuit connecting with battery pack, described
Charging and discharging circuit is in parallel with the preliminary filling circuit, and string is equipped with charge and discharge corresponding with each battery module and connects in the charging and discharging circuit
Tentaculum, the master control set control connect each charge and discharge electric contactor, and the battery information acquisition device and the master control set are logical
Letter connection, the preliminary filling circuit is connect with the master control set.
Further, string is equipped with preliminary filling resistance and preliminary filling contactor on the preliminary filling circuit, and the master control set control connects
Connect the preliminary filling contactor.
Further, the battery information acquisition device includes temperature collecting cell.
Further, the battery information acquisition device further includes voltage acquisition unit.
Further, the battery information acquisition device further includes current acquisition unit.
Further, the battery management system further includes the DC/DC converter connecting with battery pack, and the DC/DC becomes
Parallel operation is for being electrically connected the master control set, temperature collecting cell, voltage acquisition unit and current acquisition unit.
Further, the battery information acquisition device and the master control set are communicated to connect by CAN bus.
Further, the battery management system further includes startup power supply.
Further, on the basis of battery pack scheme eight, the startup power supply is 12V battery feed.
The utility model has the beneficial effects that：
The utility model, which provides, is provided with the charging and discharging circuit connecting with battery pack and the preliminary filling circuit connecting with battery pack,
Charging and discharging circuit is in parallel with preliminary filling circuit, and string is equipped with charge and discharge electric contactor, master control set control connection charge and discharge in charging and discharging circuit
Electric contactor, battery information acquisition device and master control set communicate to connect, and preliminary filling circuit is connect with master control set.Charging and discharging circuit
Realize electric discharge overcurrent protection and charging current constant control of the battery pack in charge and discharge process；Preliminary filling circuit is when powering on beginning pair
Battery pack is pre-charged, and is prevented the inconsistent generation circulation of total voltage between each battery module of powered on moment, is realized electricity
Active equalization between the module of pond, structure is simple, and operation is easy, and portfolio effect is preferable, improves the safety management to battery pack
Function extends battery pack service life, reduces operating cost, improves the reliability of battery pack.
Temperature collecting cell acquires the battery temperature in charging process in real time, and voltage acquisition unit is used for charging
Cell voltage in the process is acquired in real time, and current acquisition unit for adopting the battery current in charging process in real time
Collection.
Battery management system further includes DC/DC converter, and battery pack is connect with DC/DC converter, passes through DC/DC converter
After voltage of transformation, different size of voltage can be provided for battery information acquisition device and master control set, meet battery information and adopt
The power demands of acquisition means and master control set.
Detailed description of the invention
Fig. 1 is the structural block diagram of battery management system；
Fig. 2 is the precharge artifacts flow chart of battery preliminary filling device；
Fig. 3 is the structural schematic diagram in battery charging and discharging circuit and preliminary filling circuit；
Fig. 4 is control strategy schematic diagram when battery charges；
Control strategy schematic diagram when Fig. 5 is battery discharge.
Specific embodiment
Specific embodiment of the present utility model is further described with reference to the accompanying drawing：
A kind of battery pack includes at least two battery modules, further includes the battery management system for having management battery pack, this reality
Example is applied so that battery pack is included 9 battery modules as an example, in parallel between 9 battery modules, battery management system manages 9 electricity jointly
Pond module, each battery module is corresponding equipped with battery information acquisition device, which can extend making for battery pack
With the service life, the reliability of battery pack is improved.
Specifically, as shown in figures 1 and 3, a kind of battery management system, including master control set BCU, be used for and corresponding electricity
The battery information acquisition device BMU of pond module connection, it the charging and discharging circuit for connecting with battery pack, is used to connect with battery pack
Preliminary filling circuit, charging and discharging circuit is in parallel with preliminary filling circuit, in charging and discharging circuit string be equipped with charge and discharge corresponding with battery module
Contactor, since battery pack includes 9 battery modules, then each number of charge and discharge electric contactor is also 9, and each charge and discharge is in electrical contact
Device is connected in parallel, and master control set control connection charge and discharge electric contactor, preliminary filling circuit is connect with master control set；String is set on preliminary filling circuit
There are preliminary filling resistance and preliminary filling contactor, master control set control connection preliminary filling contactor.In Fig. 3, charging and discharging circuit and preliminary filling circuit
One end connect with battery anode, i.e., the positive terminal collectively constituted with 9 battery modules is connect, and charging and discharging circuit and preliminary filling return
The other end on road is connect with copper bar, copper bar refer to the cathode by 9 battery modules link together composition battery pack cathode.
Preliminary filling circuit is for preventing powered on moment from generating circulation since the total voltage between each battery pack is inconsistent, electricity
The charging strategy of pond preliminary filling is as shown in Fig. 2, be specifically the voltage for detecting each battery module, if the electricity between modules
Pressure difference has reached precharge pressure difference setting value, then is closed pre-charge contactor, if not up to precharge pressure difference setting value, waits
Charge and discharge then detect the electric current of each battery module, the electric current of each battery module reaches if detecting if starting preliminary filling
Preliminary filling current setting value, then battery pre-charging is completed, and starts to discharge.
Wherein, the corresponding battery information acquisition device of each battery module include temperature collecting cell, voltage acquisition unit and
The input terminal of current acquisition unit, temperature collecting cell is connect with battery module, and the output end of temperature collecting cell and master control fill
Connection is set, the real-time temperature values of each battery module in the charging process of acquisition are sent to master control set；Voltage acquisition unit
Input terminal connect with battery pack, the output end of voltage acquisition unit is connect with master control set, will be in the charging process of acquisition
The real-time voltage of each battery module and the voltage of single battery are sent to master control set；The input terminal and battery of current acquisition unit
Module connection, the output end of current acquisition unit is connect with master control set, by each battery module in the charging process of acquisition
Real-time current value is sent to master control set.Meanwhile battery information acquisition device also acquires the temperature information of battery module, monomer
The state of charge information of battery.
Master control set carries out the integrated information of battery pack according to the information of voltage, current information, temperature information received
Processing, controls principal and second relay carries out charging and discharging protection.In battery power discharge, master control set control
Charging and discharging circuit processed carries out electric discharge overcurrent protection, Cross prevention, short-circuit protection to battery pack；When battery pack charging when, control
Charging and discharging circuit carries out constant current protection to battery pack, and excessive charging current is limited in preset value.Battery as shown in Figure 4 fills
Control strategy schematic diagram when electric, when detect the monomer minimum voltage in one of them or several battery modules be greater than 3.6V
When, charge and discharge electric contactor corresponding with battery module is disconnected, the charging of battery module is stopped, and records the volume for disconnecting battery module
Number and disconnect battery module total number J, when disconnection battery module total number J be less than battery module number N (this reality
Apply the N=9 of example) when, discharge current at this time is detected, if discharge current is greater than 0, master control set is sent to charge and discharge electric contactor
Close command, each battery module then discharge；If the total number J of the battery module disconnected is greater than the number N of battery module,
Then then judge the size of copper bar voltage, if copper bar voltage is greater than 50V, master control set sends to charge and discharge electric contactor and is closed
Instruction, each battery module then discharge.Control strategy schematic diagram when battery discharge as shown in Figure 5, when detecting it
In monomer minimum voltage in one or several battery modules when being less than 2.7V, disconnect charge and discharge corresponding with battery module and connect
Tentaculum, stops the electric discharge of battery module, and records the total number J of the battery module of the number and disconnection that disconnect battery module, when
When the total number J of the battery module of disconnection is less than number N (N=9 of the present embodiment) of battery module, charging electricity at this time is detected
Stream, if charging current is greater than 0, master control set sends close command to charge and discharge electric contactor, and each battery module is then filled
Electricity；If the total number J of the battery module disconnected is greater than the number N of battery module, the size of copper bar voltage is then judged, if copper
When arranging voltage less than 50V, then master control set sends close command to charge and discharge electric contactor, and each battery module then charges.
Battery management system further includes having DC/DC converter, DC/DC converter high-voltage end and battery pack, charging and discharging circuit,
The connection of preliminary filling circuit, DC/DC converter high-voltage end are also connect with bus, low-pressure end and master control set, battery information acquisition device
Connection, battery module are adopted after DC/DC converter voltage of transformation for the temperature in master control set and battery information acquisition device
Collect unit, voltage acquisition unit and the power supply of current acquisition unit, meets master control set, temperature collecting cell, voltage acquisition unit
And the different power demands of current acquisition unit.Further, logical using CAN between battery information acquisition device and master control set
Letter connection.
In order to guarantee the normal work of battery management system, on the basis of above-mentioned battery management system structure, cell tube
Reason system further includes that the startup power supply of starting voltage is provided for battery management system, which is 12V battery feed,
12V battery feed provides startup power supply when battery management system starts for the first time, after battery management system start completion,
12V battery feed disconnects, and is battery management system continued power by battery module.
The master control set of the utility model is CPU processor, certainly can also be some other with identical using FPGA etc.
The equipment of function.
Specific embodiment is presented above, but the utility model is not limited to embodiment described above.This
The basic ideas of utility model are above-mentioned basic scheme, for those of ordinary skill in the art, according to the present utility model
Introduction, the model, formula, parameter for designing various modifications do not need to spend creative work.The utility model is not being departed from
Principle and spirit in the case where the guarantor of the utility model is still fallen within to variation, modification, replacement and the deformation that embodiment carries out
It protects in range.
Claims (18)
1. a kind of battery management system, which is characterized in that the battery information acquisition including master control set, for being connect with battery pack
Device, the charging and discharging circuit for being connect with battery pack, the preliminary filling circuit for being connect with battery pack, the charging and discharging circuit with
The preliminary filling circuit is in parallel, and string is equipped with charge and discharge corresponding with each battery module of battery pack and is in electrical contact in the charging and discharging circuit
Device, the master control set control connect each charge and discharge electric contactor, and the battery information acquisition device is communicated with the master control set
Connection, the preliminary filling circuit is connect with the master control set.
2. battery management system according to claim 1, which is characterized in that string is equipped with preliminary filling resistance on the preliminary filling circuit
And preliminary filling contactor, the master control set control connect the preliminary filling contactor.
3. battery management system according to claim 2, which is characterized in that the battery information acquisition device includes temperature
Acquisition unit.
4. battery management system according to claim 2, which is characterized in that the battery information acquisition device further includes electricity
Press acquisition unit.
5. battery management system according to claim 2, which is characterized in that the battery information acquisition device further includes electricity
Flow acquisition unit.
6. battery management system according to claim 1, which is characterized in that the battery management system further include for
The DC/DC converter of battery pack connection, the DC/DC converter is for being electrically connected the master control set and battery information acquisition dress
It sets.
7. battery management system according to claim 6, which is characterized in that the battery information acquisition device and the master
Device is controlled to communicate to connect by CAN bus.
8. battery management system according to claim 7, which is characterized in that the battery management system further includes starting electricity
Source.
9. battery management system according to claim 8, which is characterized in that the startup power supply is 12V battery feed.
10. a kind of battery pack, which is characterized in that including battery management system and at least two battery modules, the battery management
System includes master control set, the charging and discharging circuit connecting with battery pack, the preliminary filling circuit connecting with battery pack, and the charge and discharge are returned
Road is in parallel with the preliminary filling circuit, and string is equipped with charge and discharge electric contactor corresponding with each battery module, institute in the charging and discharging circuit
It states master control set control and connects each charge and discharge electric contactor, the battery information acquisition device and the master control set communicate to connect,
The preliminary filling circuit is connect with the master control set.
11. battery pack according to claim 10, which is characterized in that string is equipped with preliminary filling resistance and pre- on the preliminary filling circuit
Contactor is filled, the master control set control connects the preliminary filling contactor.
12. battery pack according to claim 11, which is characterized in that the battery information acquisition device includes temperature acquisition
Unit.
13. battery pack according to claim 11, which is characterized in that the battery information acquisition device further includes that voltage is adopted
Collect unit.
14. battery pack according to claim 11, which is characterized in that the battery information acquisition device further includes that electric current is adopted
Collect unit.
15. battery pack according to claim 10, which is characterized in that the battery management system further includes connecting with battery pack
The DC/DC converter connect, the DC/DC converter is for being electrically connected the master control set and battery information acquisition device.
16. battery pack according to claim 15, which is characterized in that the battery information acquisition device and the master control fill
It sets and is communicated to connect by CAN bus.
17. battery pack according to claim 16, which is characterized in that the battery management system further includes startup power supply.
18. battery pack according to claim 17, which is characterized in that the startup power supply is 12V battery feed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820330266.6U CN208142855U (en) | 2018-03-09 | 2018-03-09 | A kind of battery management system and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820330266.6U CN208142855U (en) | 2018-03-09 | 2018-03-09 | A kind of battery management system and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN208142855U true CN208142855U (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820330266.6U Expired - Fee Related CN208142855U (en) | 2018-03-09 | 2018-03-09 | A kind of battery management system and battery pack |
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| CN (1) | CN208142855U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109860741A (en) * | 2019-02-27 | 2019-06-07 | 广州宝狮新能源有限公司 | A kind of compatible fault-tolerant large-sized battery series connection and PCS parallel system |
| CN111725829A (en) * | 2019-03-19 | 2020-09-29 | 上海交通大学 | Hierarchical composite energy storage system for ship |
| CN111816938A (en) * | 2020-07-06 | 2020-10-23 | 安徽恒明工程技术有限公司 | Gradient utilization method for retired battery |
| CN112165132A (en) * | 2020-09-25 | 2021-01-01 | 包头昊明稀土新电源科技有限公司 | Independent power supply and operation method thereof |
| CN115833330A (en) * | 2023-01-09 | 2023-03-21 | 北京宏光星宇科技发展有限公司 | Battery management system suitable for communication base station |
-
2018
- 2018-03-09 CN CN201820330266.6U patent/CN208142855U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109860741A (en) * | 2019-02-27 | 2019-06-07 | 广州宝狮新能源有限公司 | A kind of compatible fault-tolerant large-sized battery series connection and PCS parallel system |
| CN111725829A (en) * | 2019-03-19 | 2020-09-29 | 上海交通大学 | Hierarchical composite energy storage system for ship |
| CN111816938A (en) * | 2020-07-06 | 2020-10-23 | 安徽恒明工程技术有限公司 | Gradient utilization method for retired battery |
| CN112165132A (en) * | 2020-09-25 | 2021-01-01 | 包头昊明稀土新电源科技有限公司 | Independent power supply and operation method thereof |
| CN115833330A (en) * | 2023-01-09 | 2023-03-21 | 北京宏光星宇科技发展有限公司 | Battery management system suitable for communication base station |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20210309 |
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| CF01 | Termination of patent right due to non-payment of annual fee |