CN117013109A - Battery management system and method for automatically distributing slave control unit ID - Google Patents

Battery management system and method for automatically distributing slave control unit ID Download PDF

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Publication number
CN117013109A
CN117013109A CN202310985255.7A CN202310985255A CN117013109A CN 117013109 A CN117013109 A CN 117013109A CN 202310985255 A CN202310985255 A CN 202310985255A CN 117013109 A CN117013109 A CN 117013109A
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slave
slave control
control unit
mcu
mos tube
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CN202310985255.7A
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Chinese (zh)
Inventor
陈炜明
叶颖坤
孟超
陈文全
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Avic Tech Xiamen Electric Power Technology Co ltd
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Avic Tech Xiamen Electric Power Technology Co ltd
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Priority to CN202310985255.7A priority Critical patent/CN117013109A/en
Publication of CN117013109A publication Critical patent/CN117013109A/en
Pending legal-status Critical Current

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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
    • H01M10/425—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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/30—Managing network names, e.g. use of aliases or nicknames
    • H04L61/3015—Name registration, generation or assignment
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention discloses a battery management system and a method for automatically distributing slave control unit IDs, which relate to the field of battery management systems. And the two cascade terminal groups of all slave control units are unified, the two cascade terminal groups are connected in cascade, the in-out direction is not distinguished, the operation method is simplified, and the production and the assembly are convenient.

Description

Battery management system and method for automatically distributing slave control unit ID
Technical Field
The invention relates to the field of battery management systems, in particular to a battery management system and a method for automatically distributing slave control unit IDs.
Background
In an energy storage lithium Battery Management System (BMS), a master control unit (BCU, battery Control Unit) needs to collect information such as voltage, temperature and the like of each battery from a plurality of slave control units (BMU, battery Management Unit), which needs to distinguish each slave control unit by using different ID addresses.
As shown in fig. 1, the prior art method for allocating the ID of the slave unit is to add an input/output IO interface to a microcontroller (i.e., a master MCU) of a master unit (BCU), and connect the microcontrollers (i.e., slave MCUs) of the slave units in a communication manner, so as to automatically set the ID of each slave unit. The existing method has the following problems: the IO interface resource of the slave control MCU is occupied, the terminals of each slave control BMU must be connected with the input/output ports from the IN, errors are easy to occur, connectors IN different forms are needed for foolproof, and the BMU plate has a certain assembly direction requirement on the module. These bring inconvenience to the integrated circuit arrangement, jumper wire construction, etc. of the battery management system. And moreover, an IO interface is adopted to detect a front-stage signal, an isolation device is needed to reduce interference, the cost is increased, the interference still exists, and the reliability of a battery management system is affected.
Disclosure of Invention
The present invention is directed to a battery management system and method for automatically assigning slave IDs, which overcomes the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a battery management system capable of automatically distributing slave control unit IDs comprises a master control unit and a plurality of slave control units, wherein the plurality of slave control units are all connected with the master control unit through CAN protocol communication; the slave control unit comprises a slave control MCU and a blocking device;
the blocking device comprises a first MOS tube, a second MOS tube and a third MOS tube; the outflow end of the first MOS tube is connected with a No. 1 wiring terminal, and the outflow end of the second MOS tube is connected with a No. 8 wiring terminal; the inflow end of the first MOS tube is connected with the inflow end of the second MOS tube to form a first node; the control end of the first MOS tube, the control end of the second MOS tube and the inflow end of the third MOS tube are connected with each other to form a second node, and a first resistor is connected between the second node and the first node; the output end of the third MOS tube is grounded;
the IO interface of the slave control MCU is connected with a second resistor in series and then connected with the control end of the third MOS tube; the power supply positive electrode port of the slave control MCU is connected with the first node, and the power supply negative electrode port is connected with a No. 2 wiring terminal and a No. 7 wiring terminal;
the slave control units are sequentially connected, so that the No. 7 connecting terminal of the front-stage slave control unit is connected with the No. 2 connecting terminal of the rear-stage slave control unit, and the No. 8 connecting terminal of the front-stage slave control unit is connected with the No. 1 connecting terminal of the rear-stage slave control unit;
the main control BCU of the main control unit comprises an anode port and a cathode port for externally supplying power; the positive electrode port and the negative electrode port are respectively and correspondingly connected with a No. 1 wiring terminal and a No. 2 wiring terminal of the first slave control unit.
As a specific implementation manner, the first MOS transistor and the second MOS transistor are P-channel MOS transistors, the inflow end is a source S, the outflow end is a drain D, and the control end is a gate G; the third MOS transistor is an N-channel MOS transistor, the inflow end is a drain electrode D, the outflow end is a source electrode S, and the control end is a grid electrode G.
Further, the CAN_L interface of the slave control MCU is connected with a No. 3 wiring terminal and a No. 6 wiring terminal, and the CAN_H interface is connected with a No. 4 wiring terminal and a No. 5 wiring terminal;
the wiring terminal No. 3 and the wiring terminal No. 4 of the first slave control unit are respectively correspondingly connected with the CAN_L interface and the CAN_H interface of the master control unit; the slave control units are sequentially connected, so that the No. 6 wiring terminal and the No. 5 wiring terminal of the front slave control unit are correspondingly connected with the No. 3 wiring terminal and the No. 4 wiring terminal of the rear slave control unit respectively.
A battery management method for automatically distributing ID of slave control unit, which uses any one of the above battery management systems to distribute ID to multiple slave control units under the same master control unit, specifically comprises the following steps:
(1) The main control BCU of the main control unit is electrified, current flows into the power positive electrode port of the slave MCU of the first slave control unit from the positive electrode port through the No. 1 connecting terminal and the body diode of the first MOS tube, and flows back to the negative electrode port of the main control unit from the power negative electrode port of the slave control MCU through the No. two ports, so that the slave MCU of the first slave control unit is electrified; at this time, the slave MCU of the first slave control unit is not configured with an ID, and the IO interface outputs a low-level signal to enable the third MOS tube to be non-conductive, and then the first MOS tube and the second MOS tube are also non-conductive, so that the wiring terminal No. 1 and the wiring terminal No. 2 are disconnected, and therefore the slave MCU of the later slave control unit is not electrified;
(2) The master control BCU sends an encoding instruction of an ID value through the CAN bus, and the slave control MCU of the first slave control unit receives the encoding instruction and sets the ID of the encoding instruction as the ID value of the encoding instruction;
(3) The master control BCU sends an instruction for enabling the blocking device to the slave control MCU in the step (2), the slave control MCU responds to the instruction and enables the IO interface of the slave control MCU to output a high-level signal, and the slave control MCU responds to the instruction to enable the blocking device to be conducted so as to enable the slave control MCU of the slave control unit at the later stage to be electrified;
(4) According to the steps (2) - (3), the ID allocation to the remaining slave units is accomplished step by step with mutually different ID values.
Further, the number of slave units is n=2, 3, 4 … …; the ID value of the first slave unit is set to 1; after the secondary slave MCU is electrified, the master control BCU judges whether the ID value distributed at present is the maximum value n;
if not, the main control BCU adds 1 to the ID value of the coding instruction, and then the ID allocation of the secondary control BCU is completed according to the steps (2) and (3);
if yes, ending ID allocation.
Further, in the step (2), after the slave MCU finishes setting the ID value, the slave MCU replies a message of finishing the ID setting to the master MCU; and (3) after the main control MCU receives the message, executing the step (3).
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the blocking device to connect the power supply end tunnel stage of each slave control unit to the main control unit, and cooperates with the CAN bus and the IO interface enabling signal of the slave control unit to realize the tunnel stage power-on allocation ID value of each slave control unit, and has low cost and good anti-interference performance. And the two cascade terminal groups of all the slave control units are unified, the two cascade terminal groups are connected in cascade nearby, the production process is simplified, and IO interface resources of the slave control units are saved.
In addition, in the existing method, cascade terminals of the IO interface have in-out directions, and the cascade terminals are connected in error, so that normal operation cannot be realized, and even devices are damaged. The cascade terminals in the invention do not distinguish the in-out direction, simplify the operation method, do not need fool-proof design, can use the same type of wiring terminals, are convenient for production and assembly, and reduce the labor cost.
Drawings
Fig. 1 is a schematic diagram of simple circuit connection of master and slave control units of a conventional battery management system.
Fig. 2 is a schematic diagram of simple circuit connection of master and slave control units of the battery management system according to the present invention.
FIG. 3 is a flow chart of automatic assignment of slave IDs in the present invention.
Detailed Description
Specific embodiments of the present invention will be described below with reference to the accompanying drawings. Numerous details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent to one skilled in the art that the present invention may be practiced without these details.
As shown in fig. 2, a battery management system for automatically allocating slave unit IDs includes a master unit 1, where the master unit 1 is sequentially connected with three slave units 2, so that a cascade relationship is established between the master unit 1 and the three slave units 2. Of course, the number of slave units 2 is not limited to three, but may be two, four, five, or six … ….
As shown in fig. 2, the three slave units 2 are all connected to the master unit through CAN protocol communication. Specifically, the slave control unit 2 comprises a slave control MCU, the slave control MCU is connected with a CAN module, a CAN_L interface of the CAN module is connected with a No. 3 wiring terminal and a No. 6 wiring terminal, and a CAN_H interface is connected with a No. 4 wiring terminal and a No. 5 wiring terminal.
When in connection, the CAN_L interface and the CAN_H interface of the main control unit 1 are correspondingly connected to the No. 3 wiring terminal and the No. 4 wiring terminal of the first slave control unit 2 respectively; the No. 6 binding post and the No. 5 binding post of the front-stage slave control unit 2 are respectively connected to the No. 3 binding post and the No. 4 binding post of the rear-stage slave control unit 2 until the three slave control units 2 are sequentially connected.
As shown in fig. 2, the slave unit further includes a blocking device for turning on and off the power of the slave unit of the subsequent stage.
As shown in fig. 2, the blocking device mainly includes a first MOS transistor Q1, a second MOS transistor Q2, and a third MOS transistor Q3. The inflow end of the first MOS tube Q1 is connected with the inflow end of the second MOS tube Q2 to form a first node a1; the control end of the first MOS transistor Q1, the control end of the second MOS transistor Q2, and the inflow end of the third MOS transistor Q3 are connected to each other to form a second node a2. A first resistor R1 is connected between the second node and the first node. The output end of the third MOS tube Q3 is grounded, and the control end is connected with a second resistor R2 in series and then is connected with an IO interface of the slave control MCU; the power supply positive electrode port of the slave control MCU is connected with the first node a1. In addition, a power supply negative electrode port of the slave control MCU is connected with a No. 2 wiring terminal and a No. 7 wiring terminal; the outflow end of the first MOS tube Q1 is connected with a No. 1 binding post, and the outflow end of the second MOS tube Q2 is connected with a No. 8 binding post.
Physically, the wiring terminals 1, 2, 3 and 4 are arranged in sequence to form a cascade terminal group; the wiring terminals No. 5, no. 6, no. 7 and No. 8 are arranged in sequence to form another cascade terminal group. And the wiring terminal arrangement modes of the two cascade terminal groups are the same, and the external functions are the same.
The invention adopts the blocking device to connect the power supply end tunnel stage of each slave control unit to the main control unit, and cooperates with the CAN bus and the IO interface enabling signal of the slave control unit to realize the tunnel stage power-on allocation ID value of each slave control unit, and has low cost and good anti-interference performance. And the two cascade terminal groups of all the slave control units are unified, the two cascade terminal groups are connected in cascade nearby, the production process is simplified, and IO interface resources of the slave control units are saved.
Further, the main control BCU of the main control unit 1 includes a positive electrode port and a negative electrode port for externally supplying power.
When in connection, the positive electrode port and the negative electrode port of the main control unit 1 are correspondingly connected with the No. 1 wiring terminal and the No. 2 wiring terminal of the first slave control unit 2 respectively; then, the No. 7 connection terminal of the preceding slave control unit 2 is connected to the No. 2 connection terminal of the following slave control unit 2, and the No. 8 connection terminal of the preceding slave control unit 2 is connected to the No. 1 connection terminal of the following slave control unit 2 until the three slave control units 2 are sequentially connected.
In a specific embodiment, as shown in fig. 2, the first MOS transistor Q1 and the second MOS transistor are P-channel MOS transistors, and for the P-channel MOS transistor, the inflow end is the source S, the outflow end is the drain D, and the control end is the gate G. The third MOS transistor Q3 is an N-channel MOS transistor, and for the N-channel MOS transistor, the inflow end is the drain D, the outflow end is the source S, and the control end is the gate G. In addition, the third MOS transistor Q3 may be an NPN transistor.
More specifically, the first MOS transistor Q1 and the second MOS transistor are of the SI2301 type, the third MOS transistor Q3 is of the 2N7002 type, and the first resistor R1 and the second resistor R2 are both 10kΩ resistors.
Of course, the first MOS transistor Q1 and the second MOS transistor Q2 may also be N-channel MOS transistors. However, if the first MOS transistor Q1 and the second MOS transistor Q2 are N-channel MOS transistors, another set of isolation power supplies opposite to the source S end needs to be added to drive the MOS to be turned on, which is complex in circuit form and high in cost.
The invention adopts the blocking device to connect the power supply end tunnel stage of each slave control unit to the main control unit, and cooperates with the CAN bus and the IO interface enabling signals of the slave control units, thereby realizing the tunnel stage power-on allocation ID value of each slave control unit, and having low cost and good anti-interference performance.
In addition, the two cascade terminal groups of all the slave control units are unified, the two cascade terminal groups are connected in cascade nearby, the production process is simplified, and IO interface resources of the slave control units are saved.
In addition, the cascade terminal in the invention does not distinguish the in-out direction, and the operation method is simplified. Taking connection of the master control unit, the first slave control unit and the later slave control unit as an example, except that as shown in fig. 2, the positive electrode port, the negative electrode port, the can_l port and the can_h port are respectively and correspondingly connected with the No. 1 connecting terminal, the No. 2 connecting terminal, the No. 3 connecting terminal and the No. 4 connecting terminal, and the No. 5 connecting terminal, the No. 6 connecting terminal, the No. 7 connecting terminal and the No. 8 connecting terminal are connected with the later slave control unit. The positive electrode port, the negative electrode port, the CAN_L port and the CAN_H port CAN be correspondingly connected with a No. 8 binding post, a No. 7 binding post, a No. 6 binding post and a No. 5 binding post respectively, and the No. 1 binding post, the No. 2 binding post, the No. 3 binding post and the No. 4 binding post are connected with a rear-stage slave control unit.
As shown in fig. 2 and 3, in order to more clearly explain the working principle of the above battery management system, the present invention further discloses a battery management method for automatically allocating IDs of slave units, and the above battery management system is used for allocating IDs to a plurality of slave units 2 under the same master unit 1, and specifically includes the following steps:
(1) The main control BCU of the main control unit 1 is electrified, current flows into the power positive electrode port of the slave control MCU of the first slave control unit 2 from the positive electrode port through the No. 1 wiring terminal and the body diode of the first MOS tube Q1, and flows back to the negative electrode port of the main control unit 1 from the power negative electrode port of the slave control MCU through the No. two port, so that the slave control MCU of the first slave control unit 2 is electrified.
Specifically, after the master control unit 1 is powered on, the initial value of the ID for allocation is 1, and the number of slave control units 2 is n (n=1, 2, 3 … …); the slave MCU of the first slave control unit 2 is not configured with an ID, an IO interface of the slave control MCU outputs a low-level signal, so that the third MOS tube Q3 is not conducted, and then the first MOS tube Q1 and the second MOS tube Q2 are also not conducted, so that the wiring terminal No. 1 and the wiring terminal No. 2 are disconnected, and the slave MCU of the later slave control unit 2 is not electrified.
(2) The master control BCU of the master control unit 1 sends an encoded instruction of the ID value through the CAN bus, and the slave control MCU of the first slave control unit 2 receives the encoded instruction and sets the ID thereof as the ID value of the encoded instruction.
Specifically, after the main control unit 1 is powered on, an automatic frame allocation instruction (i.e. a coding instruction) is sent, the first slave control unit which does not allocate an ID responds to the instruction, the received ID value is set as the ID, a message with the ID set completed is replied to the main control MCU, and the main control MCU executes step (3) after receiving the message.
(3) The master control BCU of the master control unit 1 sends an instruction for enabling the blocking device to the slave control MCU in the step (2), and the slave control MCU responds to the instruction to enable the blocking device to be turned on, so that the slave control MCUs of the slave control units at the later stage are powered on.
Specifically, the slave control MCU responds to the instruction and makes the IO interface output as a high level signal, so that the third MOS transistor Q3 is turned on, and then the first MOS transistor Q1 and the second MOS transistor Q2 are also turned on, the No. 1 wiring terminal is turned on with the No. 2 wiring terminal, and the slave control MCU of the slave control unit 2 at the later stage is powered on; and the slave MCU replies an enabling completion message to the master MCU.
(4) According to the steps (2) - (3), the ID allocation to the remaining slave units is accomplished step by step with mutually different ID values.
Specifically, after receiving the message of completion of enabling, the master control BCU judges whether the current ID value is the maximum value n; if not, the main control BCU adds 1 to the ID value of the coding instruction, then steps (2) - (3) are executed, and ID allocation is carried out on the slave control unit 2 at the later stage; if yes, ending ID allocation.
Of course, the initial value of the ID for allocation may be other than 1, and the value of the ID for allocation may be other than 1 at a time, and it is only necessary to ensure that the values of IDs allocated to the slave units 2 are different from each other.
The foregoing is merely illustrative of specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the design concept shall fall within the scope of the present invention.

Claims (6)

1. The battery management system capable of automatically distributing the ID of the slave control unit comprises a main control unit and a plurality of slave control units, wherein the plurality of slave control units are all connected with the main control unit through CAN protocol communication; the method is characterized in that: the slave control unit comprises a slave control MCU and a blocking device;
the blocking device comprises a first MOS tube, a second MOS tube and a third MOS tube; the outflow end of the first MOS tube is connected with a No. 1 wiring terminal, and the outflow end of the second MOS tube is connected with a No. 8 wiring terminal; the inflow end of the first MOS tube is connected with the inflow end of the second MOS tube to form a first node; the control end of the first MOS tube, the control end of the second MOS tube and the inflow end of the third MOS tube are connected with each other to form a second node, and a first resistor is connected between the second node and the first node; the output end of the third MOS tube is grounded;
the IO interface of the slave control MCU is connected with a second resistor in series and then connected with the control end of the third MOS tube; the power supply positive electrode port of the slave control MCU is connected with the first node, and the power supply negative electrode port is connected with a No. 2 wiring terminal and a No. 7 wiring terminal;
the slave control units are sequentially connected, so that the No. 7 connecting terminal of the front-stage slave control unit is connected with the No. 2 connecting terminal of the rear-stage slave control unit, and the No. 8 connecting terminal of the front-stage slave control unit is connected with the No. 1 connecting terminal of the rear-stage slave control unit;
the main control BCU of the main control unit comprises an anode port and a cathode port for externally supplying power; the positive electrode port and the negative electrode port are respectively and correspondingly connected with a No. 1 wiring terminal and a No. 2 wiring terminal of the first slave control unit.
2. A battery management system for automatically assigning slave IDs as in claim 1, wherein: the first MOS tube and the second MOS tube are both P-channel MOS tubes; the third MOS tube is an N-channel MOS tube.
3. A battery management system for automatically assigning slave IDs as in claim 1, wherein: the CAN_L interface of the slave control MCU is connected with a No. 3 wiring terminal and a No. 6 wiring terminal, and the CAN_H interface is connected with a No. 4 wiring terminal and a No. 5 wiring terminal;
the wiring terminal No. 3 and the wiring terminal No. 4 of the first slave control unit are respectively correspondingly connected with the CAN_L interface and the CAN_H interface of the master control unit; the slave control units are sequentially connected, so that the No. 6 wiring terminal and the No. 5 wiring terminal of the front slave control unit are correspondingly connected with the No. 3 wiring terminal and the No. 4 wiring terminal of the rear slave control unit respectively.
4. A battery management method for automatically assigning a slave unit ID, characterized by: the method for performing ID allocation on a plurality of slave units under the same master unit by using the battery management system according to any one of claims 1 to 3 specifically comprises the following steps:
(1) The main control BCU of the main control unit is electrified, current flows into the power positive electrode port of the slave MCU of the first slave control unit from the positive electrode port through the No. 1 connecting terminal and the body diode of the first MOS tube, and flows back to the negative electrode port of the main control unit from the power negative electrode port of the slave control MCU through the No. two ports, so that the slave MCU of the first slave control unit is electrified;
(2) The master control BCU sends an encoding instruction of an ID value through the CAN bus, and the slave control MCU of the first slave control unit receives the encoding instruction and sets the ID of the encoding instruction as the ID value of the encoding instruction;
(3) The master control BCU sends an instruction for enabling the blocking device to the slave control MCU in the step (2), the slave control MCU responds to the instruction and enables the IO interface of the slave control MCU to output a high-level signal, and the slave control MCU responds to the instruction to enable the blocking device to be conducted so as to enable the slave control MCU of the slave control unit at the later stage to be electrified;
(4) According to the steps (2) - (3), the ID allocation of each slave control unit is gradually completed by using different ID values, the ID allocation of all slave control MCU is completed, and the IDs of all slave control MCU are different.
5. The battery management method for automatically assigning a slave unit ID according to claim 4, wherein: the number of the slave control units is n=2, 3, 4 … …; the ID value of the first slave unit is set to 1; after the secondary slave MCU is electrified, the master control BCU judges whether the ID value distributed at present is the maximum value n;
if not, the main control BCU adds 1 to the ID value of the coding instruction, and then the ID allocation of the secondary control BCU is completed according to the steps (2) and (3);
if yes, ending ID allocation.
6. A battery management method for automatically assigning a slave unit ID according to claim 4 or 5, wherein: in the step (2), after the slave MCU finishes the ID value setting, replying a message of finishing the ID setting to the master MCU; and (3) after the main control MCU receives the message, executing the step (3).
CN202310985255.7A 2023-08-07 2023-08-07 Battery management system and method for automatically distributing slave control unit ID Pending CN117013109A (en)

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Application Number Priority Date Filing Date Title
CN202310985255.7A CN117013109A (en) 2023-08-07 2023-08-07 Battery management system and method for automatically distributing slave control unit ID

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Application Number Priority Date Filing Date Title
CN202310985255.7A CN117013109A (en) 2023-08-07 2023-08-07 Battery management system and method for automatically distributing slave control unit ID

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