CN116130805A - Battery management method, device and battery management circuit - Google Patents

Battery management method, device and battery management circuit Download PDF

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Publication number
CN116130805A
CN116130805A CN202211722546.9A CN202211722546A CN116130805A CN 116130805 A CN116130805 A CN 116130805A CN 202211722546 A CN202211722546 A CN 202211722546A CN 116130805 A CN116130805 A CN 116130805A
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battery management
management module
chip selection
mode
parallel
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黄建明
江子荣
仇惠惠
张建彪
杨红新
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Dr Octopus Intelligent Technology Shanghai Co Ltd
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Dr Octopus Intelligent Technology Shanghai Co Ltd
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Priority to CN202211722546.9A priority Critical patent/CN116130805A/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling 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
    • H01M10/425—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
    • H01M10/425—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
    • 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
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The application provides a battery management method, a device and a battery management circuit, wherein the method comprises the following steps: the battery management system comprises a plurality of battery management modules, wherein each battery management module is connected in parallel, and each battery management module performs the following steps: judging chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module; if the chip selection signals are the chip selection signals indicating the slave mode, calculating the time when the chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode; if the time of the chip selection signals indicating the slave mode exceeds the mode holding time preset by the battery management module, the battery management module enters the master mode. The effect of autonomously selecting the host slave in the plurality of battery management modules and ensuring the normal operation of the battery management system is achieved.

Description

Battery management method, device and battery management circuit
Technical Field
The present invention relates to the field of battery management technologies, and in particular, to a battery management method, device and circuit.
Background
In recent years, green energy is greatly developed in China, and a lithium battery is used as an indispensable ring of green energy and is closely connected with our life. A battery management module (BMS) is the brain of a lithium battery system, and is responsible for managing the operation and safety of the entire battery system.
Currently, in the existing multi-machine parallel technology of a battery management module (BMS), a host in the battery management module (BMS) cannot be changed once determined, so that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails, and potential safety hazards exist.
Disclosure of Invention
In view of this, an object of the present application is to provide a battery management method, an apparatus and a battery management circuit, which can determine a host and a slave independently from among a plurality of battery management modules by judging a chip selection signal among the plurality of battery management modules connected in parallel, so as to solve the problem that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails, and have a potential safety hazard, and achieve the effect of independently selecting the host slave among the plurality of battery management modules, thereby ensuring the normal work of the battery management system.
In a first aspect, an embodiment of the present application provides a battery management method, applied to a battery management system of an electric vehicle, where the battery management system includes a plurality of battery management modules, each of which is connected in parallel, and each of the battery management modules performs the following steps: judging chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module, wherein the chip selection signals are used for indicating that each battery management module is in a chip selection signal of a master mode or a chip selection signal of a slave mode; if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode, calculating the time when the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode; if the time of the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module is longer than the mode holding time preset by the battery management module, the battery management module enters the host mode, and the plurality of other battery management modules connected in parallel with the battery management module send the chip selection signals indicating the host mode.
Optionally, the mode retention time preset by each battery management module is different.
Optionally, the battery management module in the host mode further performs the following steps: sending communication requests to other battery management modules in a slave mode, which are connected in parallel with the battery management module in a master mode, respectively every preset connection determining time; judging whether communication request replies of the battery management modules in the slave mode are received or not according to each battery management module in the slave mode; if the communication request reply of the battery management module in the slave mode is received, determining that the battery management module in the slave mode is in a working state; if the communication request reply of the battery management module in the slave mode is not received, determining that the battery management module in the slave mode is not in a working state.
Optionally, the battery management module in the host mode further performs the following steps: and sending a battery management data acquisition request to each battery management module in the working state and in the slave mode at intervals of preset data acquisition time, and receiving the battery management data sent by the battery management module in the working state and in the slave mode aiming at each battery management module in the working state and in the slave mode.
Optionally, each battery management module is connected to an external communication device, wherein each battery management module in the host mode further performs the following steps: and transmitting the battery management data of the plurality of battery management modules through the external communication equipment according to the data acquisition request sent by the external communication equipment.
Optionally, each battery management module added to the battery management system is connected in parallel with other parallel battery management modules, wherein the execution of each battery management module added to the battery management system comprises the following steps: acquiring chip selection signals of other parallel battery management modules of the battery management system in real time; judging whether the chip selection signal of each other parallel battery management module comprises a chip selection signal for indicating that the battery management module is in a host mode; if yes, the battery management module added into the battery management system enters a slave mode; if not, the battery management module added with the battery management system calculates the time when the chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module added with the battery management system are the chip selection signals indicating the slave mode; if the time of the chip selection signal of the plurality of other battery management modules connected in parallel with the battery management module of the added battery management system exceeds the mode holding time preset by the battery management module of the added battery management system, the battery management module of the added battery management system enters the host mode, and the plurality of other battery management modules connected in parallel with the battery management module of the added battery management system instruct to send the chip selection signal of the host mode.
In a second aspect, an embodiment of the present application further provides a battery management device, which is applied to a battery management system of an electric automobile, where the battery management system includes a plurality of battery management modules, and each battery management module is connected in parallel, and the device includes:
the chip selection signal judging module is used for judging chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module, wherein the chip selection signals are used for indicating that each battery management module is a chip selection signal indicating a host mode or a chip selection signal indicating a slave mode;
the time calculation module of the slave mode calculates the time when the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode;
and the mode determining module is used for enabling the battery management module to enter a host mode and enabling the battery management module to send a host mode chip selection signal to a plurality of other battery management modules connected in parallel with the battery management module if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode and the time of the chip selection signals exceeds the mode holding time preset by the battery management module.
In a third aspect, the present application further provides a battery management circuit, which is applied to a battery management system of an electric automobile, where the battery management system includes a plurality of battery management modules, and a plurality of chip selection signal pins of each battery management module are respectively connected with chip selection signal pins of other battery management modules to obtain chip selection signals of the other battery management modules.
Optionally, the master output and slave input pins of each battery management module are connected in series, and the battery management module in the master mode performs data transmission with the battery management module in the slave mode through the master output and slave input pins.
Optionally, the slave output and master input pins of each battery management module are connected in series, and the battery management module in the slave mode performs data transmission with the battery management module in the master mode through the slave output and master input pin.
In a fourth aspect, embodiments of the present application further provide an electronic device, including: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory in communication over the bus when the electronic device is running, the machine-readable instructions when executed by the processor performing the steps of the battery management method as described above.
In a fifth aspect, embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the battery management method as described above.
According to the battery management method, the device and the battery management circuit, the host and the slave can be independently determined from among the plurality of battery management modules through judging the chip selection signals among the plurality of battery management modules connected in parallel, and the problem that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails once the host in the battery management module (BMS) is determined is solved, so that the problem that potential safety hazards exist is solved, and the effect that the host slave is independently selected from the plurality of battery management modules, and the normal work of the battery management system is guaranteed.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a battery management method according to an embodiment of the present application;
fig. 2 is a schematic diagram of a battery management circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a battery management device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, every other embodiment that a person skilled in the art would obtain without making any inventive effort is within the scope of protection of the present application.
First, application scenarios applicable to the present application will be described. The method and the device can be applied to the technical field of battery management.
According to research, in recent years, green energy is greatly developed in China, and a lithium battery is used as an indispensable ring of the green energy and is closely connected with our life. A battery management module (BMS) is the brain of a lithium battery system, and is responsible for managing the operation and safety of the entire battery system.
Currently, in the existing multi-machine parallel technology of a battery management module (BMS), a host in the battery management module (BMS) cannot be changed once determined, so that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails, and potential safety hazards exist.
Based on this, the embodiment of the application provides a battery management method, a device and a battery management circuit, which can determine a host and a slave independently from among a plurality of battery management modules by judging chip selection signals among the plurality of battery management modules connected in parallel, and solve the problem that once the host in a battery management module (BMS) in the prior art is determined, the host cannot be changed, so that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails, and the problem of potential safety hazard exists, thereby achieving the effect of independently selecting the host slave in the plurality of battery management modules and guaranteeing the normal work of the battery management system.
Referring to fig. 1, fig. 1 is a flowchart of a battery management method according to an embodiment of the present application. As shown in fig. 1, a battery management method provided in an embodiment of the present application includes:
s101, judging chip selection signals of a plurality of other battery management modules connected with the battery management module in parallel.
The chip selection signal is used for indicating that each battery management module is in a chip selection signal of a master mode or a chip selection signal of a slave mode;
it should be noted that, the battery management system applied to the electric automobile includes a plurality of battery management modules, and each battery management module is connected in parallel.
Referring to fig. 2, fig. 2 is a schematic diagram of a battery management circuit according to an embodiment of the present application. As shown in fig. 2, a schematic diagram of a battery management circuit provided in an embodiment of the present application includes: battery management module BMS1, battery management module BMS2, and battery management module BMS3.
The chip selection signal pins of each battery management module are respectively connected with the chip selection signal pins of other battery management modules to obtain the chip selection signals of the other battery management modules.
For example, referring to fig. 2, the battery management circuit of fig. 2 includes: the battery management system comprises a battery management module BMS1, a battery management module BMS2 and a battery management module BMS3, wherein a chip selection signal pin CS1 of the battery management module BMS1 is connected with a chip selection signal pin CS2 of the battery management module BMS 3; the chip selection signal pin CS2 of the battery management module BMS1 is connected with the chip selection signal pin CS1 of the battery management module BMS 2; the chip select signal pin CS2 of the battery management module BMS2 is connected with the chip select signal pin CS1 of the battery management module BMS3.
Thus, the battery management module BMS1, the battery management module BMS2, and the battery management module BMS3 can each receive the chip select signals of the other battery management modules.
Here, the mode retention time preset by each battery management module is different.
And S102, if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode, calculating the time when the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode.
And S103, if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode, the time exceeds the mode holding time preset by the battery management module, the battery management module enters the host mode, and the chip selection signals of the host mode are sent to the plurality of other battery management modules connected in parallel with the battery management module.
For example, the preset pattern retention time of BMS1 may be 5 seconds, the preset pattern retention time of BMS2 may be 10 seconds, and the preset pattern retention time of BMS3 may be 15 seconds. When the battery management module BMS1, the battery management module BMS2 and the battery management module BMS3 are the chip select signals indicating the slave mode, when the time when the battery management module BMS2 and the battery management module BMS3 are detected by the BMS1 to be the chip select signal indicating the slave mode exceeds 5 seconds, the BMS1 enters the master mode and transmits the master mode chip select signal to the battery management module BMS2 and the battery management module BMS3.
Specifically, the battery management module in the host mode further performs the following steps: sending communication requests to other battery management modules in a slave mode, which are connected in parallel with the battery management module in a master mode, respectively every preset connection determining time; judging whether communication request replies of the battery management modules in the slave mode are received or not according to each battery management module in the slave mode; if the communication request reply of the battery management module in the slave mode is received, determining that the battery management module in the slave mode is in a working state; if the communication request reply of the battery management module in the slave mode is not received, determining that the battery management module in the slave mode is not in a working state.
Specifically, the master output pins of each BMS module are connected in series, and the battery management module in the master mode performs data transmission with the battery management module in the slave mode through the master output slave input pins. The slave output and master input pins of each battery management module are connected in series, and the battery management module in the slave mode performs data transmission with the battery management module in the master mode through the slave output and master input pins.
Wherein, the battery management module in the host mode further performs the following steps: and sending a battery management data acquisition request to each battery management module in the working state and in the slave mode at intervals of preset data acquisition time, and receiving the battery management data sent by the battery management module in the working state and in the slave mode aiming at each battery management module in the working state and in the slave mode.
For example, referring to fig. 2, each BMS module includes a MOSI (master input/slave input) pin and a MISO (master input/slave output) pin, and when BMS1 is in the master mode, the MOSI pin of BMS1 may transmit a data acquisition instruction to the MOSI pin of BMS2 and the MOSI pin of BMS3, and after BMS2 and BMS3 receive the data acquisition instruction, data of the battery collected by BMS2 and BMS3 are output to the MISO pin of BMS1 through the MISO pin of BMS2 and the MISO pin of BMS3.
Here, the data of the battery collected by each BMS includes battery basic data of voltage, current, temperature, etc. of the battery.
Optionally, each battery management module is connected to an external communication device.
Wherein each battery management module in the host mode further performs the steps of: and transmitting the battery management data of the plurality of battery management modules through the external communication equipment according to the data acquisition request sent by the external communication equipment.
Optionally, each battery management module added to the battery management system is connected in parallel with other parallel battery management modules.
Wherein, each battery management module added into the battery management system executes the following steps: acquiring chip selection signals of other parallel battery management modules of the battery management system in real time; judging whether the chip selection signal of each other parallel battery management module comprises a chip selection signal for indicating that the battery management module is in a host mode; if yes, the battery management module added into the battery management system enters a slave mode; if not, the battery management module added with the battery management system calculates the time when the chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module added with the battery management system are the chip selection signals indicating the slave mode; if the time of the chip selection signal of the plurality of other battery management modules connected in parallel with the battery management module of the added battery management system is longer than the mode holding time preset by the battery management module of the added battery management system, the battery management module of the added battery management system enters the host mode, and the plurality of other battery management modules connected in parallel with the battery management module of the added battery management system send the chip selection signal of the host mode.
Optionally, clock pins of each battery management module are connected in series, and illustratively, each battery management module may be connected in series and parallel by using an SPI bus, and four-wire communication using the SPI bus provided in this embodiment of the present application is a MOSI (master output slave input) pin, a MISO (master input slave output) pin, an SCLK (clock) pin, and a CS (chip select signal) pin, respectively.
According to the battery management method, the host and the slave can be independently determined from among the battery management modules through judging the chip selection signals among the battery management modules connected in parallel, and the problem that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails once the host in the battery management module (BMS) is determined in the prior art is solved, so that the problem of potential safety hazard exists is solved, the host slave is independently selected from the battery management modules, and the effect of normal work of the battery management system is guaranteed.
Based on the same inventive concept, the embodiment of the present application further provides a battery management device corresponding to the battery management method, and since the principle of solving the problem by the device in the embodiment of the present application is similar to that of the battery management method in the embodiment of the present application, the implementation of the device may refer to the implementation of the method, and the repetition is omitted.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery management device provided in an embodiment of the present application, and is applied to a battery management system of an electric vehicle, where the battery management system includes a plurality of battery management modules, each of the battery management modules is connected in parallel, and the battery management device 300 includes:
the chip selection signal judging module 301 judges chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module, where the chip selection signals are used for indicating that each battery management module is a chip selection signal of a master mode or a chip selection signal of a slave mode.
And the slave mode time calculation module 302 calculates the time when the chip select signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip select signals indicating the slave mode if the chip select signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip select signals indicating the slave mode.
The mode determining module 303 determines that if the time of the chip select signal of the plurality of other battery management modules connected in parallel with the battery management module is longer than the mode holding time preset by the battery management module, the battery management module enters the host mode, and the plurality of other battery management modules connected in parallel with the battery management module send the host mode chip select signal.
According to the battery management device, the host and the slave can be independently determined from among the battery management modules through judging the chip selection signals among the battery management modules connected in parallel, and the problem that the battery management system cannot work normally after the host in the battery management module (BMS) is pulled out or fails once the host in the battery management module (BMS) is determined in the prior art is solved, so that the problem of potential safety hazard exists, the host slave is independently selected from among the battery management modules, and the effect of normal work of the battery management system is guaranteed.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 4, the electronic device 400 includes a processor 410, a memory 420, and a bus 430.
The memory 420 stores machine-readable instructions executable by the processor 410, and when the electronic device 400 is running, the processor 410 communicates with the memory 420 through the bus 430, and when the machine-readable instructions are executed by the processor 410, the steps of the battery management method in the method embodiment shown in fig. 1 can be executed, and the specific implementation can be referred to the method embodiment and will not be described herein.
The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the battery management method in the embodiment of the method shown in fig. 1 may be executed, and a specific implementation manner may refer to the embodiment of the method and will not be described herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present application, and are not intended to limit the scope of the present application, but the present application is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, the present application is not limited thereto. Any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope of the disclosure of the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A battery management method is characterized in that the battery management system applied to an electric automobile comprises a plurality of battery management modules which are connected in parallel,
wherein each battery management module performs the steps of:
judging chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module, wherein the chip selection signals are used for indicating that each battery management module is in a chip selection signal of a master mode or a chip selection signal of a slave mode;
if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode, calculating the time when the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode;
if the time of the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module is longer than the mode holding time preset by the battery management module, the battery management module enters the host mode and sends the chip selection signals indicating the host mode to the plurality of other battery management modules connected in parallel with the battery management module.
2. The method of claim 1, wherein the pattern retention time preset by each battery management module is different.
3. The method of claim 1, wherein the battery management module in the host mode further performs the steps of:
sending communication requests to other battery management modules in a slave mode, which are connected in parallel with the battery management module in a master mode, respectively every preset connection determining time;
judging whether communication request replies of the battery management modules in the slave mode are received or not according to each battery management module in the slave mode;
if the communication request reply of the battery management module in the slave mode is received, determining that the battery management module in the slave mode is in a working state;
if the communication request reply of the battery management module in the slave mode is not received, determining that the battery management module in the slave mode is not in a working state.
4. The method of claim 3, wherein the battery management module in the host mode further performs the steps of:
every preset data acquisition time, respectively sending a battery management data acquisition request to each battery management module in a working state and in a slave mode,
and receiving the battery management data sent by each battery management module in the working state and in the slave mode.
5. The method of claim 1, wherein each battery management module is connected to an external communication device,
wherein each battery management module in the host mode further performs the steps of:
and transmitting the battery management data of the plurality of battery management modules through the external communication equipment according to the data acquisition request sent by the external communication equipment.
6. The method of claim 1, wherein each of the battery management modules added to the battery management system is connected in parallel with the other parallel battery management modules,
wherein, each battery management module added into the battery management system executes the following steps:
acquiring chip selection signals of other parallel battery management modules of the battery management system in real time;
judging whether the chip selection signal of each other parallel battery management module comprises a chip selection signal for indicating that the battery management module is in a host mode;
if yes, the battery management module added into the battery management system enters a slave mode;
if not, the battery management module added with the battery management system calculates the time when the chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module added with the battery management system are the chip selection signals indicating the slave mode;
if the time of the chip selection signal of the plurality of other battery management modules connected in parallel with the battery management module of the added battery management system is longer than the mode holding time preset by the battery management module of the added battery management system, the battery management module of the added battery management system enters the host mode, and the plurality of other battery management modules connected in parallel with the battery management module of the added battery management system send the chip selection signal of the host mode.
7. A battery management apparatus, characterized by being applied to a battery management system of an electric vehicle, the battery management system including a plurality of battery management modules, each battery management module being connected in parallel therebetween, the apparatus comprising:
the chip selection signal judging module is used for judging chip selection signals of a plurality of other battery management modules connected in parallel with the battery management module, wherein the chip selection signals are used for indicating that each battery management module is a chip selection signal indicating a host mode or a chip selection signal indicating a slave mode;
the time calculation module of the slave mode calculates the time when the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode;
and the mode determining module is used for enabling the battery management module to enter a host mode and enabling the battery management module to send a host mode chip selection signal to a plurality of other battery management modules connected in parallel with the battery management module if the chip selection signals of the plurality of other battery management modules connected in parallel with the battery management module are the chip selection signals indicating the slave mode and the time of the chip selection signals exceeds the mode holding time preset by the battery management module.
8. A battery management circuit is characterized in that the battery management circuit is applied to a battery management system of an electric automobile, the battery management system comprises a plurality of battery management modules,
the plurality of chip selection signal pins of each battery management module are respectively connected with the chip selection signal pins of other battery management modules to obtain the chip selection signals of the other battery management modules.
9. The battery management system of claim 8, wherein the master output slave input pins of each battery management module are connected in series, and the battery management module in the master mode performs data transmission with the battery management module in the slave mode through the master output slave input pins.
10. The battery management system of claim 8, wherein the slave output and master input pins of each battery management module are connected in series, and the battery management module in the slave mode performs data transmission with the battery management module in the master mode through the slave output and master input pin.
CN202211722546.9A 2022-12-30 2022-12-30 Battery management method, device and battery management circuit Pending CN116130805A (en)

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Application Number Priority Date Filing Date Title
CN202211722546.9A CN116130805A (en) 2022-12-30 2022-12-30 Battery management method, device and battery management circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211722546.9A CN116130805A (en) 2022-12-30 2022-12-30 Battery management method, device and battery management circuit

Publications (1)

Publication Number Publication Date
CN116130805A true CN116130805A (en) 2023-05-16

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Application Number Title Priority Date Filing Date
CN202211722546.9A Pending CN116130805A (en) 2022-12-30 2022-12-30 Battery management method, device and battery management circuit

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Country Link
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