CN109713756A - A kind of battery management system and battery management method - Google Patents
A kind of battery management system and battery management method Download PDFInfo
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- CN109713756A CN109713756A CN201910086827.1A CN201910086827A CN109713756A CN 109713756 A CN109713756 A CN 109713756A CN 201910086827 A CN201910086827 A CN 201910086827A CN 109713756 A CN109713756 A CN 109713756A
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- cell module
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Abstract
This application discloses a kind of battery management system and battery management methods, wherein, the battery management system is made of the cell module of main control module and multiple parallel connections, when the cell module is in operating mode, state message can be sent to the main control module, the state message includes the identification information and status information of the cell module, so that the main control module can be according to the state message received, determine in running order cell module and battery control strategy, it realizes when cell module quantity changes or a certain cell module breaks down, battery management system still is able to applicable purpose, improve the applicability and scalability of battery management system.
Description
Technical field
This application involves Vehicle Engineering technical fields, more specifically to a kind of battery management system and battery management
Method.
Background technique
With the continuous development of motor vehicle technology, the answering as the new energy vehicle in main drive source using motor
With more prevalent, this kind of new energy vehicle includes pure electric vehicle motor vehicles, the mixed dynamic motor vehicles of plug-in and the mixed motivation motor-car of oil electricity
Etc..
In the new energy vehicle of these types, device of the power battery as electric energy storage is these motor vehicles
Important component.In the prior art, the generally given battery modules scheme of basis of the battery management system in power battery, if
Set corresponding management strategy, such as the display of cell safety module, remaining capacity (State of Charge, SOC), power battery
Power boundary (State of Power, SOP) setting etc..But the battery modules scheme in power battery changes or a certain electricity
When Chi Mo group breaks down, current battery management system be can not work normally, and applicability is poor, and scalability is lower.
Summary of the invention
In order to solve the above technical problems, this application provides a kind of battery management system and battery management method, to realize
When cell module quantity changes or a certain cell module breaks down, battery management system still is able to fit
Purpose, to promote the applicability and scalability of battery management system.
To realize the above-mentioned technical purpose, the embodiment of the present application provides following technical solution:
A kind of battery management system, comprising: the cell module of main control module and multiple parallel connections；Wherein,
The cell module includes operating mode and non-operating mode；When the cell module is in Working mould
When formula, for sending state message to the main control module, the state message includes the identity mark of the cell module
Know information and status information；
The main control module be used to be determined according to the state message that receives in running order cell module and
Battery control strategy.
Optionally, the status information includes: the monomer voltage information and monomer temperature information of the cell module.
Optionally, the cell module includes: monomer control unit and multiple control subelements；Wherein,
The monomer control unit is used to obtain the information of voltage of multiple control subelements as the monomer voltage
Information, and the temperature information of multiple control subelements is obtained as the monomer temperature information；With for according to acquisition
The monomer voltage information, monomer temperature information and the identification information of storage generate state message and send out to the main control module
It send.
Optionally, the main control module determines in running order battery cell mould according to the state message received
Block and battery control strategy are specifically used for,
According to the identification information in the state message received, in running order cell module is determined；
According to all monomer voltage information and all monomer temperature information in all state messages received, determine most
Polymeric monomer voltage, minimum monomer voltage, maximum monomer temperature and minimum monomer temperature；
According to the maximum monomer voltage and the minimum monomer voltage, over-voltage and under-voltage protection strategy are determined；
According to the maximum monomer temperature and the minimum monomer temperature, overheat protector strategy is determined；
According to the quantity of in running order cell module, determine battery capacity information, maximum charging current and
Minimum charge current.
Optionally, pass through Differencing communication mode or CAN communication between the monomer control unit and multiple control subelements
Mode connects.
Optionally, the cell module further includes abnormality mode；
When the cell module is in abnormality mode, stop sending state message to the main control module,
And the failure message comprising identification information is sent to the main control module.
Optionally, the main control module is also used to after receiving the failure message, according in the failure message
Identification information stops cell module corresponding with the identification information in the failure message and works, and according to
The failure message received, determines battery control strategy.
A kind of battery management method is applied to battery management system described in any of the above embodiments, the battery management system
Cell module including main control module and multiple parallel connections；The battery management method includes:
When the cell module is in operating mode, Xiang Suoshu main control module sends state message, the state
Message includes the identification information and status information of the cell module, so that the main control module is according to receiving
State message determines in running order cell module and battery control strategy.
Optionally, the status information includes: the monomer voltage information and monomer temperature information of the cell module.
Optionally, the battery management method further include:
When the cell module is in abnormality mode, stop sending state message to the main control module,
And the failure message comprising identification information is sent to the main control module, so that the main control module is receiving the event
After hindering message, according to the identification information in the failure message, stop and the identification information in the failure message
Corresponding cell module work, and according to the failure message received, determine battery control strategy.
It can be seen from the above technical proposal that the embodiment of the present application provides a kind of battery management system and battery management side
Method, wherein the battery management system is made of the cell module of main control module and multiple parallel connections, when the battery cell
When module is in operating mode, state message can be sent to the main control module, the state message includes the battery list
The identification information and status information of module, so that the main control module can be determined according to the state message received
In running order cell module and battery control strategy, realize cell module quantity change or certain
When one cell module breaks down, battery management system still is able to applicable purpose, improves battery management system
Applicability and scalability.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram for battery management system that one embodiment of the application provides；
Fig. 2 is a kind of workflow schematic diagram for battery management system that one embodiment of the application provides；
Fig. 3 is a kind of structural schematic diagram for battery management system that another embodiment of the application provides；
Fig. 4 is a kind of workflow schematic diagram for battery management system that another embodiment of the application provides；
Fig. 5 is a kind of structural schematic diagram for battery management system that another embodiment of the application provides；
Fig. 6 is a kind of workflow schematic diagram for battery management system that another embodiment of the application provides；
Fig. 7 is a kind of flow diagram for battery management method that one embodiment of the application provides；
Fig. 8 is a kind of flow diagram for battery management method that another embodiment of the application provides.
Specific embodiment
As described in background, in the prior art, the battery management system in power battery is generally according to given electricity
Corresponding management strategy, such as cell safety module, remaining capacity (State of Charge, SOC) is arranged in Chi Mo group scheme
Display, power battery power boundary (State of Power, SOP) setting etc..But the battery modules side in power battery
When case changes or a certain battery modules break down, current battery management system be can not work normally, and applicability is poor, can
Scalability is lower.
Such as in Chinese patent CN201810712294.9, a kind of electric car and its battery management system are disclosed
System, which includes battery cell, mainboard and several daughter boards, and each daughter board corresponds to multiple battery cells；Each daughter board passes through CAN bus
Information exchange is carried out with mainboard, each daughter board acquires the temperature information of corresponding each battery cell respectively and information of voltage and is transferred to
Mainboard, according to daughter board, the variance of mean temperature and the variance of average voltage within certain period distinguish ranked calculation to mainboard/daughter board
The score of daughter board is calculated in the resulting grading parameters of method；Mainboard/daughter board further according to daughter board scoring event to the preferential of daughter board
Grading Mobile state adjustment.Conventional batteries management system is solved in communication using more important existing for static scheduling algorithm
Data information can not send sometimes or transmit in time, and asking for battery defect cannot be found in time by turn resulting in battery management system
Topic, realizes the reliability and safety of each daughter board message information transmission, and then improves the performance of electric car.
In the technical solution, need to determine daughter board number according to battery cell quantity number in power battery in advance, if
The adjustment of mould group number, entire battery management system then can not work normally, and need to re-start artificial setting.
In view of this, the embodiment of the present application provides a kind of battery management system, comprising: main control module and multiple in parallel
Cell module；Wherein,
The cell module includes operating mode and non-operating mode；When the cell module is in Working mould
When formula, for sending state message to the main control module, the state message includes the identity mark of the cell module
Know information and status information；
The main control module be used to be determined according to the state message that receives in running order cell module and
Battery control strategy.
The battery management system is made of the cell module of main control module and multiple parallel connections, when the battery cell
When module is in operating mode, state message can be sent to the main control module, the state message includes the battery list
The identification information and status information of module, so that the main control module can be determined according to the state message received
In running order cell module and battery control strategy, realize cell module quantity change or certain
When one cell module breaks down, battery management system still is able to applicable purpose, improves battery management system
Applicability and scalability.
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The embodiment of the present application provides a kind of battery management system, as shown in Figure 1, comprising: main control module 10 and it is multiple simultaneously
The cell module 20 of connection；Wherein,
The cell module 20 includes operating mode and non-operating mode；When the cell module 20 is in work
When operation mode, for sending state message to the main control module 10, the state message includes the cell module 20
Identification information and status information；
The main control module 10 is used to determine in running order cell module according to the state message received
20 and battery control strategy.
The workflow signal of the battery management system refers to Fig. 2, can be seen that multiple parallel connections from Fig. 1 and Fig. 2
Cell module 20 only when being in operating mode, just sends state message to the main control module 10, so that master control mould
Block 10 can determine the cell module for being in operating mode (i.e. in running order) according to the state message received
20, and according to the quantity of the cell module 20 in operating mode, determine battery control strategy.
It should be noted that when cell module 20 is in non-operating mode, and it is not involved in the electricity of power battery
Supply and charging process, also do not send the state message to the main control module 10.
In conjunction with Fig. 1 and Fig. 2 it is found that the battery management system by main control module 10 and multiple parallel connections cell module
20 are constituted, and when the cell module 20 is in operating mode, can send state message, institute to the main control module 10
The identification information and status information that state message includes the cell module 20 are stated, so that the main control module 10 can
To determine in running order cell module 20 and battery control strategy, realize according to the state message received
When 20 quantity of cell module changes or a certain cell module 20 breaks down, battery management system still can
Enough applicable purposes, improve the applicability and scalability of battery management system.
On the basis of the above embodiments, in one embodiment of the application, as shown in figure 3, the battery cell mould
Block 20 includes: monomer control unit 21 and multiple control subelements 22；Wherein,
The monomer control unit 21 is used to obtain the information of voltage of multiple control subelements 22 as the monomer
Information of voltage, and the temperature information of multiple control subelements 22 is obtained as the monomer temperature information；Be used for basis
The monomer voltage information, monomer temperature information and the identification information of storage obtained generates state message to the master control
Module 10 is sent.
Optionally, pass through Differencing communication (TPL communication) between the monomer control unit 21 and multiple control subelements 22
Mode or CAN communication mode connect.
In the alternative embodiment of the application, in order to reduce the cost of the battery management system, the monomer control
It is connected between unit 21 processed and multiple control subelements 22 by Differencing communication mode.
Correspondingly, the main control module 10 determines in running order according to the state message received with reference to Fig. 4
Cell module 20 and battery control strategy are specifically used for,
According to the identification information in the state message received, in running order cell module is determined
20；
According to all monomer voltage information and all monomer temperature information in all state messages received, determine most
Polymeric monomer voltage, minimum monomer voltage, maximum monomer temperature and minimum monomer temperature；
According to the maximum monomer voltage and the minimum monomer voltage, over-voltage and under-voltage protection strategy are determined；
According to the maximum monomer temperature and the minimum monomer temperature, overheat protector strategy is determined；
According to the quantity of in running order cell module 20, battery capacity information, maximum charging current are determined
And minimum charge current.
Specifically, the quantity according in running order cell module 20 determines battery capacity information, most
Big charging current and minimum charge current include:
According to the quantity of in running order cell module 20, in running order cell module 20
The sum of capacity be used as battery capacity；
Using the sum of in running order maximum charging current of cell module 20 as the battery management system
Maximum charging current；
Using the sum of in running order minimum charge current of cell module 20 as the battery management system
Minimum charge current.
Specifically, it with reference to Fig. 5, is illustrated by taking 3 cell modules 20 in parallel as an example in Fig. 5, it is assumed that this 3
The capacity of cell module 20 is 50Ah (ampere-hour), and the maximum charging current that each cell module 20 is allowed is 5A,
Minimum charge current is 1A；Then when only cell module 20A is in operating mode in Fig. 5, battery capacity information is
50Ah, maximum charging current 5A, minimum charge current 1A.As the cell module 20B and cell module in Fig. 5
When 20C is also at operating mode, battery capacity information is then 150Ah, maximum charging current 15A, minimum charge current 3A.
On the basis of the above embodiments, in another embodiment of the application, as shown in fig. 6, the battery cell
Module 20 further includes abnormality mode；
When the cell module 20 is in abnormality mode, stop sending state report to the main control module 10
Text, and the failure message comprising identification information is sent to the main control module 10.
Correspondingly, the main control module 10 is also used to after receiving the failure message, according in the failure message
Identification information, stop the work of corresponding with the identification information in failure message cell module 20, and
According to the failure message received, battery control strategy is determined.
Similar, still by taking structure shown in fig. 5 as an example, when under normal circumstances, 3 cell modules 20 are in work
Operation mode；And a certain cell module 20 is when breaking down (when i.e. in abnormality mode), the cell module 20
Stop sending state message to the main control module 10, and sends the failure comprising identification information to the main control module 10
Message；
After the main control module 10 receives the failure message, stops the cell module 20 in failure and work, and
The capacity that the cell module 20 is subtracted from battery capacity information subtracts the cell module from maximum charging current
20 maximum charging current subtracts the minimum charge current of the cell module 20 from minimum charge current.
Battery management method provided by the embodiments of the present application is described below, battery management method described below with
Above-described battery management system can correspond to each other reference.
Correspondingly, the embodiment of the present application provides a kind of battery management method, applied to described in any of the above-described embodiment
Battery management system, the battery management system include the cell module of main control module and multiple parallel connections；As shown in fig. 7,
The battery management method includes:
S101: when the cell module is in operating mode, Xiang Suoshu main control module sends state message, described
State message includes the identification information and status information of the cell module, so that the main control module is according to reception
The state message arrived determines in running order cell module and battery control strategy.
When the cell module is in non-operating mode, the state message is not sent to the main control module.
Optionally, the status information includes: the monomer voltage information and monomer temperature information of the cell module.
On the basis of the above embodiments, in another embodiment of the application, as shown in figure 8, the battery management
Method includes:
S201: when the cell module is in operating mode, Xiang Suoshu main control module sends state message, described
State message includes the identification information and status information of the cell module, so that the main control module is according to reception
The state message arrived determines in running order cell module and battery control strategy.
S202: when the cell module is in abnormality mode, stop sending state to the main control module
Message, and the failure message comprising identification information is sent to the main control module, so that the main control module is receiving
After the failure message, according to the identification information in the failure message, stop and the identity mark in the failure message
Know the corresponding cell module work of information, and according to the failure message received, determines battery control strategy.
In conclusion the embodiment of the present application provides a kind of battery management system and battery management method, wherein the electricity
Pond management system is made of the cell module of main control module and multiple parallel connections, when the cell module is in Working mould
When formula, state message can be sent to the main control module, the state message includes the identity mark of the cell module
Information and status information are known, so that the main control module can determine in running order according to the state message received
Cell module and battery control strategy are realized and are changed or a certain cell module in cell module quantity
When failure, battery management system still is able to applicable purpose, improves the applicability of battery management system and expansible
Property.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of battery management system characterized by comprising the cell module of main control module and multiple parallel connections；Wherein,
The cell module includes operating mode and non-operating mode；When the cell module is in operating mode
When, for sending state message to the main control module, the state message includes the identity of the cell module
Information and status information；
The main control module is used to determine in running order cell module and battery according to the state message received
Control strategy.
2. battery management system according to claim 1, which is characterized in that the status information includes: the battery list
The monomer voltage information and monomer temperature information of module.
3. battery management system according to claim 2, which is characterized in that the cell module includes: monomer control
Unit processed and multiple control subelements；Wherein,
The monomer control unit is used to obtain the information of voltage of multiple control subelements as the monomer voltage information,
And the temperature information of multiple control subelements is obtained as the monomer temperature information；With for the list according to acquisition
The identification information of bulk voltage information, monomer temperature information and storage generates state message and sends to the main control module.
4. battery management system according to claim 3, which is characterized in that the main control module is according to the state received
Message determines that in running order cell module and battery control strategy are specifically used for,
According to the identification information in the state message received, in running order cell module is determined；
According to all monomer voltage information and all monomer temperature information in all state messages received, determine maximum single
Bulk voltage, minimum monomer voltage, maximum monomer temperature and minimum monomer temperature；
According to the maximum monomer voltage and the minimum monomer voltage, over-voltage and under-voltage protection strategy are determined；
According to the maximum monomer temperature and the minimum monomer temperature, overheat protector strategy is determined；
According to the quantity of in running order cell module, battery capacity information, maximum charging current and minimum are determined
Charging current.
5. battery management system according to claim 3, which is characterized in that the monomer control unit and multiple controls
It is connected between unit by Differencing communication mode or CAN communication mode.
6. battery management system according to claim 1, which is characterized in that the cell module further includes abnormal shape
Morphotype formula；
When the cell module is in abnormality mode, stop sending state message to the main control module, and to
The main control module sends the failure message comprising identification information.
7. battery management system according to claim 6, which is characterized in that the main control module is also used to receiving
After stating failure message, according to the identification information in the failure message, stop and the identity in the failure message
The corresponding cell module work of information, and according to the failure message received, determine battery control strategy.
8. a kind of battery management method, which is characterized in that it is applied to the described in any item battery management systems of claim 1-7,
The battery management system includes the cell module of main control module and multiple parallel connections；The battery management method includes:
When the cell module is in operating mode, Xiang Suoshu main control module sends state message, the state message
Identification information and status information including the cell module, so that the main control module is according to the state received
Message determines in running order cell module and battery control strategy.
9. battery management method according to claim 8, which is characterized in that the status information includes: the battery list
The monomer voltage information and monomer temperature information of module.
10. battery management method according to claim 8, which is characterized in that the battery management method further include:
When the cell module is in abnormality mode, stop sending state message to the main control module, and to
The main control module sends the failure message comprising identification information, so that the main control module is receiving the failure report
Wen Hou stops corresponding with the identification information in the failure message according to the identification information in the failure message
Cell module work determine battery control strategy and according to the failure message received.
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