CN109494418B - Battery core sampling device and method of battery management system - Google Patents
Battery core sampling device and method of battery management system Download PDFInfo
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- CN109494418B CN109494418B CN201811339909.4A CN201811339909A CN109494418B CN 109494418 B CN109494418 B CN 109494418B CN 201811339909 A CN201811339909 A CN 201811339909A CN 109494418 B CN109494418 B CN 109494418B
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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
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery core sampling device and a method of a battery management system, wherein the device comprises a battery pack main pack (1) and at least one battery pack sub-pack (2); the battery pack main package comprises a battery management system control main board (11) and a plurality of battery management system acquisition slave boards (3), the battery management system control main board is connected with the plurality of battery management system acquisition slave boards through a single bidirectional communication wiring harness, and the battery management system control main board is connected with a whole vehicle network through a CAN bus; the battery pack sub-pack comprises an acquisition slave board main controller (21) and a plurality of battery management system acquisition slave boards, the acquisition slave board main controller is connected with the plurality of battery management system acquisition slave boards through a single bidirectional communication wire harness, and the battery pack acquisition slave boards are sequentially connected with the battery management system control master board; the battery management system collects the slave plates to be connected with the battery modules (4). The invention can accurately and timely acquire the monomer information of each battery module and reduce the system cost.
Description
Technical Field
The invention relates to the technical field of automobile batteries, in particular to a battery core sampling device and a battery core sampling method of a battery management system.
Background
In the existing battery single-body sampling technology, aiming at an integral battery pack consisting of a plurality of sub-battery packs, sub-packs are connected with each other in a daisy chain mode through sampling wire harnesses, the more the sub-packs are, the longer the sampling wire harnesses are, the more complex the software layers are, the collected information of the sub-battery pack single-body is transmitted to a main battery pack, and the risk of information loss is greatly increased.
Chinese utility model patent CN 206363300U discloses a battery management chip daisy chain communication system, and this system includes: at least one battery module, single two-way communication pencil connect each module, a plurality of battery sampling chip, a plurality of chip interface according to the daisy chain mode. As the daisy chain communication mode is adopted and the number of the battery modules is large, the single sampling signal is attenuated and the signal quality is unstable.
The Chinese patent application CN 106058334A discloses a novel BATTERY management system, the architecture mainly comprises an upper computer, a BMU mainboard (BMU: BATTERY MANAGEMENT SYSTEM, meaning BATTERY management unit), a plurality of sampling control modules and BATTERY modules, the BATTERY modules are connected in a daisy chain mode, the sampling control modules are used for collecting information of each BATTERY cell in the BATTERY modules, and the BMU mainboard is used for detecting the total voltage of a BATTERY pack and making corresponding logic judgment according to data fed back by a collecting board. The scheme is strict, and although the signal transmission quality can be guaranteed, the price cost is high.
Disclosure of Invention
The invention aims to provide a battery core sampling device and a method of a battery management system, which can ensure that the information such as the voltage, the temperature and the like of a single battery of each battery module can be accurately and timely acquired, and the cost of the sampling system is reduced.
The invention is realized by the following steps:
a battery core sampling device of a battery management system comprises a battery pack main pack and at least one battery pack sub-pack; the battery pack main package comprises a battery management system control main board and a plurality of battery management system acquisition slave boards, the battery management system control main board and the plurality of battery management system acquisition slave boards are respectively connected through a single bidirectional communication wire harness, and the battery management system control main board is connected with a whole vehicle network through a CAN bus; the battery pack comprises a collection slave board main controller and a plurality of battery management system collection slave boards, the collection slave board main controller is connected with the plurality of battery management system collection slave boards through single bidirectional communication wiring harnesses, and the collection slave board main controllers of a plurality of battery pack are sequentially connected and connected to a battery management system control main board; and each battery management system acquisition slave board is correspondingly connected with one battery module respectively.
And a transceiver module is arranged in the battery management system control mainboard.
The battery management system acquisition slave board comprises an analog-to-digital conversion module, an information sampling circuit and a sampling master chip, wherein the input end of the information sampling circuit is connected with a battery module, the output end of the information sampling circuit is connected with the input end of the analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected with the input end of the sampling master chip, the output end of the sampling master chip in a battery pack master pack is connected with a battery management system control master board, and the output end of the sampling master chip in the battery pack master pack is connected with a collection slave board master controller.
The battery management system acquisition slave plate further comprises a single voltage passive equalization module, and the single voltage passive equalization module is connected to two ends of a plurality of battery monomers in the battery module in series.
A cell sampling method of a battery management system comprises the following steps:
step 1: the battery management system is powered on, the battery management system controls the main board to send a sampling instruction to a battery management system acquisition slave board in a battery pack main package, and the battery management system controls the main board to send a sampling instruction to a battery management system acquisition slave board in a battery pack main package through the acquisition slave board main controller;
step 2: a battery management system acquisition slave board in a battery pack main pack receives a sampling instruction and acquires information of a plurality of battery monomers in a battery module, and the information is directly input into a battery management system control main board in a differential communication mode;
and step 3: a battery management system acquisition slave board in a battery pack receives a sampling instruction and acquires information of a plurality of battery monomers in a battery module, the information is directly input into an acquisition slave board main controller in a differential communication mode, and the information is input into a battery management system control main board by the acquisition slave board main controller in a CAN communication mode;
and 4, step 4: the battery management system controls the main board to transmit the information of the battery monomer to the whole vehicle network in a CAN communication mode.
In step 1, when the battery management systems are powered on, each battery management system collects that the slave board is assigned with a unique address in the communication network.
In the step 1, the battery management system control main board sends a sampling instruction to the transceiver module in an SPI communication mode, and the transceiver module sends the sampling instruction to the battery management system acquisition slave board in the battery pack main pack and the acquisition slave board main controller in the plurality of battery pack sub-packs respectively in a differential communication mode.
In the step 2, the method further comprises the following sub-steps:
step 2.1: the battery management system control main board receives the information of the slave board acquired by the battery management system and judges whether the acquired information contains the unique address of the slave board acquired by the battery management system, if so, step 2.2 is executed, and if not, the main board returns to receive the information of the slave board acquired by the battery management system again;
step 2.2: the battery management system control main board respectively sends different sampling instructions to poll a plurality of battery management system acquisition slave boards in the battery pack main package, so that the battery management system acquisition slave boards acquire battery monomer information in the corresponding battery modules.
In the step 3, the method further comprises the following sub-steps:
step 3.1: the collection slave board main controller receives the information of the slave board collected by the battery management system, and judges whether the collected information contains the unique address of the slave board collected by the battery management system, if so, the step 3.2 is executed, and if not, the step returns to receive the information of the slave board collected by the battery management system again;
step 3.2: the collection slave board main controller sends the collected information to a battery management system control master board in a CAN communication mode;
step 3.3: the battery management system control main board respectively sends different sampling instructions to poll a plurality of battery management system acquisition slave boards in the battery pack package through the acquisition slave board main controller, so that the battery management system acquisition slave boards acquire information of battery monomers in the corresponding battery modules.
In the step 3, the acquisition information is sent between the two adjacent acquisition slave board main controllers in a CAN communication mode.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the CAN communication mode between the sub-battery packs, and the inside of the sub-pack still adopts the daisy chain mode and the differential communication protocol (TPL), compared with the CAN communication mode, the invention not only ensures the reliability of the transmission of the sampling information, but also reduces the sampling cost of the electric core.
2. The battery management system control mainboard sends the acquisition instruction in a mode of combining SPI communication (SPI is an abbreviation of Serial Peripheral Interface and means a Serial Peripheral Interface) and differential communication (TPL), reduces communication wiring harnesses and reduces system cost.
The invention can ensure that the information such as the voltage, the temperature and the like of the single battery in each battery module can be accurately and timely acquired, reduces the cost of a sampling system, simplifies the system architecture and is convenient to maintain.
Drawings
Fig. 1 is a system architecture diagram of a cell sampling apparatus of the battery management system of the present invention;
fig. 2 is an architecture diagram of a battery management system acquisition slave board of a battery pack main pack in a battery cell sampling device of the battery management system of the present invention;
fig. 3 is an architecture diagram of a battery management system collection slave board of a battery pack in a cell sampling device of the battery management system of the present invention;
fig. 4 is a flowchart of a cell sampling method of the battery management system of the present invention.
In the figure, 1 battery pack is a main pack, 11 battery management system control mainboards, 2 battery pack packs, 21 acquisition slave board main controllers, 3 battery management system acquisition slave boards, 31 analog-to-digital conversion modules, 32 information sampling circuits, 33 sampling main chips, 34 single voltage passive equalization modules and 4 battery modules.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, a cell sampling device of a battery management system includes a battery pack main pack 1 and at least one battery pack sub-pack 2; the battery pack main package 1 comprises a battery management system control main Board (BMU) 11 and a plurality of battery management system acquisition Slave boards (CMU _ Slave) 3, the battery management system control main board 11 and the battery management system acquisition Slave boards 3 are respectively connected through a single bidirectional communication wire harness and are communicated in a differential communication (TPL) mode, and the battery management system control main board 11 is connected with a whole vehicle network through a CAN bus to realize CAN bus communication with a whole vehicle; the battery pack 2 comprises an acquisition Slave board main controller (CMU _ Master) 21 and a plurality of battery management system acquisition Slave boards (CMU _ Slave) 3, the acquisition Slave board main controller 21 and the battery management system acquisition Slave boards 3 are respectively connected through single bidirectional communication wire harnesses and communicate in a differential communication (TPL) mode, the acquisition Slave board main controllers 21 of the battery pack 2 are sequentially connected and connected to a battery management system control main board 11 and communicate in a CAN communication mode, the situation that a plurality of sampling lines of the battery pack 2 are large and long is avoided, and meanwhile, the communication quality is guaranteed; each battery management system acquisition slave plate 3 is correspondingly connected with one battery module 4.
Referring to fig. 2 and fig. 3, the battery management system collection slave board 3 includes an analog-to-digital conversion module 31, an information sampling circuit 32, and a sampling master chip 33, an input end of the information sampling circuit 32 is connected to the battery module 4, an output end of the information sampling circuit 32 is connected to an input end of the analog-to-digital conversion module 31, an output end of the analog-to-digital conversion module 31 is connected to an input end of the sampling master chip 33, an output end of the sampling master chip 33 in the battery pack master 1 is connected to the battery management system control master board 11, and an output end of the sampling master chip 33 in the battery pack 2 is connected to the collection slave board master controller 21. The information sampling circuit 32 is used for acquiring the voltage of each battery cell in the battery module 4, and sending the acquired information to the analog-to-digital conversion module 31, so that the battery management system acquisition slave board 3 transmits the acquired information to the battery management system control main board 11 and the acquisition slave board main controller 21 in a differential communication (TPL) mode.
The battery management system gathers slave plate 3 and still includes the passive equalization module of monomer voltage 34, the passive equalization module of monomer voltage 34 concatenates the free both ends of a plurality of batteries in battery module 4, the passive equalization module of monomer voltage 34 of a plurality of battery monomer sharing in the battery module 4, when whole battery package carries out charging operation, battery management system control mainboard 11 is according to the battery monomer voltage information of collecting, to the battery monomer that voltage is high, open the passive equalization module of monomer voltage 34, consume the free electric energy of this battery, finally guarantee the uniformity of battery monomer voltage in the battery module 4. The cell voltage passive equalization module 34 is not connected to the analog-to-digital conversion module 31, the information sampling circuit 32 and the sampling main chip 33.
The battery management system control mainboard 11 is internally provided with a transceiver module, and the transceiver module can be used for converting a communication mode so as to reduce the number of connecting wires required by communication and achieve the purpose of reducing the cost.
Each battery module 4 respectively supplies power to a battery management system acquisition slave plate 3 connected with the battery module 4, and the battery management system acquisition slave plate 3 acquires data of a plurality of battery monomers in the corresponding battery module 4.
Referring to fig. 4, a method for sampling a battery cell of a battery management system includes the following steps:
step 1: the battery management system is powered on, the battery management system control main board 11 sends a sampling instruction to the battery management system collection slave board 3 in the battery pack main pack 1, and the battery management system control main board 11 sends a sampling instruction to the battery management system collection slave board 3 in the battery pack 2 through the collection slave board main controller 21.
In step 1, when the battery management systems are powered on, each battery management system collects a unique address assigned to the slave board 3 in the communication network.
In the step 1, the battery management system control main board 11 sends a sampling instruction to the transceiver module through an SPI communication mode, and the transceiver module sends the sampling instruction to the battery management system collection slave board 3 in the battery pack main pack 1 and the collection slave board main controller 21 in the plurality of battery pack sub-packs 2 through a TPL communication mode.
Step 2: the battery management system acquisition slave board 3 in the battery pack main pack 1 receives the sampling instruction and acquires information such as temperature and voltage of a plurality of battery monomers in the battery module 4, and then the information is directly input into the battery management system control main board 11 in a differential communication (TPL) mode.
In the step 2, the method further comprises the following sub-steps:
step 2.1: the battery management system control main board 11 receives the information of the slave board 3 acquired by the battery management system and judges whether the acquired information contains the unique address of the slave board 3 acquired by the battery management system, if so, step 2.2 is executed, and if not, the step returns to receive the information of the slave board 3 acquired by the battery management system again.
Step 2.2: the battery management system control main board 11 sends different sampling instructions respectively to poll a plurality of battery management system acquisition slave boards 3 in the battery pack main pack 1, so that the battery management system acquisition slave boards can acquire a large amount of data information of voltage, temperature and the like of battery monomers in the corresponding battery module 4, in order to avoid confusion and improve transmission efficiency, the battery management system control main board 11 can train and send different sampling instructions in turn to acquire corresponding battery monomer information.
And step 3: the battery management system acquisition slave board 3 in the battery pack 2 receives the sampling instruction and acquires information such as temperature and voltage of a plurality of battery monomers in the battery module 4, then directly inputs the acquisition slave board main controller 21 in a differential communication (TPL) mode, and the acquisition slave board main controller 21 inputs the information into the battery management system control mainboard 11 in a CAN communication mode.
In the step 3, the method further comprises the following sub-steps:
step 3.1: the collection slave board main controller 21 receives the information of the collection slave board 3 of the battery management system, and judges whether the collected information contains the unique address of the collection slave board 3 of the battery management system, and executes the step 3.2, if not, returns to receive the information of the collection slave board 3 of the battery management system again.
Step 3.2: the collection slave board main controller 21 sends the collection information to the battery management system control master board 11 in a CAN communication mode.
Step 3.3: the battery management system control main board 11 sends different sampling instructions respectively and polls a plurality of battery management system acquisition slave boards 3 in the battery pack packet 2 through the acquisition slave board main controller 21, so that the data information such as voltage, temperature and the like of the battery monomers in the corresponding battery module 4 can be acquired.
In the step 3, the two adjacent collection slave board main controllers 21 send collection information in a CAN communication mode.
And 4, step 4: the battery management system control main board 11 transmits the voltage, temperature and other information of the battery monomer to the whole vehicle network in a CAN communication mode.
Taking the sampling of a certain battery module a as an example, suppose that the battery module a contains 8 battery monomers, the battery management system control mainboard 11 sends monomer voltage, the temperature sampling instruction and gives the collection slave board main controller 21, the collection slave board main controller 21 transmits the collection slave board 3 for the battery management system, the battery management system collects the voltage and temperature information of the 8 battery monomers that the slave board 3 will specifically collect, transmit to the collection slave board main controller 21 through the differential communication (TPL) mode, then the collection slave board main controller 21 transmits to the battery management system control mainboard 11 through the CAN protocol, the battery management system control mainboard 11 transmits to the whole vehicle network through the CAN protocol.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A battery core sampling method of a battery management system is characterized by comprising the following steps: the electric core sampling method is realized based on an electric core sampling device of a battery management system, wherein the electric core sampling device of the battery management system comprises a main battery pack (1) and at least one battery pack (2); the battery pack main package (1) comprises a battery management system control main board (11) and a plurality of battery management system acquisition slave boards (3), the battery management system control main board (11) and the plurality of battery management system acquisition slave boards (3) are connected through a single bidirectional communication wire harness respectively and are communicated in a differential communication mode, and the battery management system control main board (11) is connected with a whole vehicle network through a CAN bus; the battery pack (2) comprises a collection slave board main controller (21) and a plurality of battery management system collection slave boards (3), the collection slave board main controller (21) and the plurality of battery management system collection slave boards (3) are connected through single bidirectional communication wiring harnesses and are communicated in a differential communication mode, and the collection slave board main controllers (21) of a plurality of battery pack (2) are sequentially connected and are connected to a battery management system control main board (11) and are communicated in a CAN communication mode; each battery management system acquisition slave plate (3) is correspondingly connected with one battery module (4) respectively; the battery management system acquisition slave board (3) comprises an analog-to-digital conversion module (31), an information sampling circuit (32) and a sampling master chip (33), the input end of the information sampling circuit (32) is connected with the battery module (4), the output end of the information sampling circuit (32) is connected with the input end of the analog-to-digital conversion module (31), the output end of the analog-to-digital conversion module (31) is connected with the input end of the sampling master chip (33), the output end of the sampling master chip (33) in the battery pack master pack (1) is connected with the battery management system control master board (11), and the output end of the sampling master chip (33) in the battery pack slave pack (2) is connected with the acquisition slave board master controller (21); the battery management system acquisition slave plate (3) further comprises a single voltage passive equalization module (34), the single voltage passive equalization module (34) is connected to two ends of a plurality of battery monomers in the battery module (4) in series, and the single voltage passive equalization module (34) is not connected with the analog-to-digital conversion module (31), the information sampling circuit (32) and the sampling main chip (33); a transceiver module is arranged in the battery management system control main board (11);
the battery core sampling method comprises the following steps:
step 1: the battery management system is powered on, the battery management system control main board (11) sends a sampling instruction to the battery management system acquisition slave board (3) in the battery pack main package (1), and the battery management system control main board (11) sends the sampling instruction to the battery management system acquisition slave board (3) in the battery pack sub-package (2) through the acquisition slave board main controller (21);
in the step 1, when the battery management systems are powered on, each battery management system collects that a slave plate (3) is allocated with a unique address in a communication network;
step 2: a battery management system acquisition slave board (3) in a battery pack main pack (1) receives a sampling instruction and acquires information of a plurality of battery monomers in a battery module (4), and the information is directly input into a battery management system control main board (11) in a differential communication mode;
in the step 2, the method further comprises the following sub-steps:
step 2.1: the battery management system control main board (11) receives the information of the battery management system acquisition slave board (3), judges whether the acquired information contains the unique address of the battery management system acquisition slave board (3), if so, executes the step 2.2, and if not, returns to receive the information of the battery management system acquisition slave board (3) again;
step 2.2: the battery management system control main board (11) respectively sends different sampling instructions to poll a plurality of battery management system acquisition slave boards (3) in the battery pack main package (1) so as to acquire battery monomer information in the corresponding battery module (4);
and step 3: a battery management system acquisition slave board (3) in a battery pack (2) receives a sampling instruction and acquires information of a plurality of battery monomers in a battery module (4), the information is directly input into an acquisition slave board main controller (21) in a differential communication mode, and the information is input into a battery management system control main board (11) by the acquisition slave board main controller (21) in a CAN communication mode;
in the step 3, the method further comprises the following sub-steps:
step 3.1: the collection slave board main controller (21) receives the information of the collection slave board (3) of the battery management system, and judges whether the collected information contains the unique address of the collection slave board (3) of the battery management system, if so, the step 3.2 is executed, and if not, the step returns to receive the information of the collection slave board (3) of the battery management system again;
step 3.2: the collection slave board main controller (21) sends the collected information to the battery management system control main board (11) in a CAN communication mode;
step 3.3: the battery management system control main board (11) respectively sends different sampling instructions to poll a plurality of battery management system acquisition slave boards (3) in the battery pack packet (2) through the acquisition slave board main controller (21), so that the battery management system acquisition slave boards acquire information of battery monomers in the corresponding battery module (4);
and 4, step 4: the battery management system control main board (11) transmits the information of the battery monomer to a whole vehicle network in a CAN communication mode;
in the step 1, the battery management system control main board (11) sends a sampling instruction to the transceiver module in an SPI communication mode, and the transceiver module sends the sampling instruction to the battery management system acquisition slave board (3) in the battery pack main pack (1) and the acquisition slave board main controller (21) in the plurality of battery pack sub-packs (2) respectively in a differential communication mode;
in the step 3, the acquisition information is sent between two adjacent acquisition slave board main controllers (21) in a CAN communication mode.
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| CN110780138B (en) * | 2019-11-12 | 2022-04-08 | 阳光电源股份有限公司 | BMS acquisition module performance test method and device |
| CN111060843A (en) * | 2019-11-25 | 2020-04-24 | 江西恒动新能源有限公司 | Device and method for detecting leakage current of slave board of battery management system |
| CN113960474B (en) * | 2020-07-06 | 2024-04-12 | 广汽埃安新能源汽车有限公司 | Method and system for collecting voltage extremum of power battery pack and electric automobile |
| CN112271410A (en) * | 2020-10-20 | 2021-01-26 | 中国第一汽车股份有限公司 | Power battery and driving equipment |
| CN113386568A (en) * | 2021-04-30 | 2021-09-14 | 芜湖安行汽车科技有限公司 | Vehicle explosion-proof battery scheme and system |
| CN113871739B (en) * | 2021-09-03 | 2024-03-29 | 上海智光电力技术有限公司 | Switching device and system of battery module and battery information acquisition control method |
| CN114094209B (en) * | 2021-10-18 | 2023-10-20 | 华人运通(江苏)技术有限公司 | Battery management system, communication control method and device thereof and vehicle |
| CN117533197A (en) * | 2023-11-29 | 2024-02-09 | 惠州市中源新能源有限公司 | Battery module for low-speed vehicle and BMS control method |
| CN118412623B (en) * | 2024-06-26 | 2024-10-11 | 杭州协能科技股份有限公司 | Energy storage device and sampling control method thereof |
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| CN207283206U (en) * | 2017-09-11 | 2018-04-27 | 上海汽车集团股份有限公司 | The integrated form analog front circuit of battery management system |
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| CN207683370U (en) * | 2017-12-08 | 2018-08-03 | 延锋伟世通电子科技（南京）有限公司 | A kind of cell management system of electric automobile based on daisy chain type cascade communication |
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| CN106253363A (en) * | 2015-06-04 | 2016-12-21 | 三星Sdi株式会社 | Battery control system and method |
| CN205335890U (en) * | 2015-12-28 | 2016-06-22 | 比亚迪股份有限公司 | Battery management system and have its electric automobile |
| CN207283206U (en) * | 2017-09-11 | 2018-04-27 | 上海汽车集团股份有限公司 | The integrated form analog front circuit of battery management system |
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