CN114497767A - Connection system and connection method for sampling, communication and control link of large lithium battery pack - Google Patents
Connection system and connection method for sampling, communication and control link of large lithium battery pack Download PDFInfo
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- CN114497767A CN114497767A CN202210072387.6A CN202210072387A CN114497767A CN 114497767 A CN114497767 A CN 114497767A CN 202210072387 A CN202210072387 A CN 202210072387A CN 114497767 A CN114497767 A CN 114497767A
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- 238000005070 sampling Methods 0.000 title claims abstract description 73
- 238000004891 communication Methods 0.000 title claims abstract description 43
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004806 packaging method and process Methods 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000007726 management method Methods 0.000 description 59
- 238000012545 processing Methods 0.000 description 6
- 206010068065 Burning mouth syndrome Diseases 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
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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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
-
- 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
Abstract
The invention provides a connection system and a connection method for a sampling, communication and control link of a large lithium battery pack, wherein the connection system comprises: the battery module sampling units are used for acquiring various data of the battery modules, and each module sampling unit corresponds to one battery module; the module sampling units are communicated and controlled with the battery management unit through the slave control bus units and are used for packaging and transmitting data acquired by the module sampling plate to the battery management unit; the battery management units are communicated and controlled with the battery control unit through the main control bus board unit, and the main control bus unit is used for packaging data processed by the battery management units of the battery modules and transmitting the packaged data to the battery control unit; the module sampling unit, the slave control bus unit and the master control bus unit form a three-layer linear connection network from a bottom layer to a top layer.
Description
Technical Field
The invention belongs to the technical field of battery management, and relates to a connection system and a connection method for a sampling, communication and control link of a large lithium battery pack.
Background
With the application of lithium battery technology, the power battery system has higher energy density, larger capacity and longer running time, and also puts new requirements on the functions of a management system (BMS) of the battery. From the topological architecture, BMSs are divided into a centralized type and a distributed type according to different project requirements.
The centralized BMS has the advantages of low cost, compact structure and high reliability, and is generally common in scenes with low capacity, low total pressure and small battery system volume.
The distributed BMS architecture can better realize hierarchical management of a module level and a system level. The slave control unit is responsible for carrying out voltage detection, temperature detection, balance management and corresponding diagnosis work on the single battery in the battery module; a high voltage management unit (HVU) is responsible for monitoring the states of the total battery pressure, the total bus pressure, the insulation resistance and the like of a system level (the bus current can be collected by a Hall sensor or a shunt); and the slave control unit and the high-voltage management unit send the analyzed data to the master control unit, and the master control unit carries out BSE (battery system state evaluation), electric system state detection, contactor management, thermal management, operation management, charging management, diagnosis management and management of internal and external communication networks.
The large lithium battery pack is composed of a plurality of lithium battery modules. Due to volume and weight requirements, the number of battery strings for a single battery module cannot be large, for example, a 400AH battery module, and only 4 strings can weigh 60-70 kg. The management system of the battery needs to perform centralized management on tens of batteries or even tens of batteries, otherwise, the communication burden of the system is greatly increased. For this reason, it is necessary to appropriately couple the respective battery modules dispersed to the BMS outside the modules.
CN110600816A discloses a battery management system and a battery management method based on wireless communication control, the battery management system includes: the wireless transmission system comprises a plurality of first battery management modules, a plurality of wireless transmission modules, a second battery management module, a wired transmission module and a control module; a first battery management module acquires the operation parameters of the corresponding single battery; a wireless transmission module wirelessly transmits the operation parameters output by the corresponding first battery management module; the second battery management module receives the multiple paths of operation parameters and calculates the residual capacity value according to the multiple paths of operation parameters; the wired transmission module carries out wired transmission on the residual capacity value; the control module receives the residual capacity value and generates a balance control signal according to the residual capacity value; each first battery management module receives the balance control signal and controls the corresponding single battery to charge or discharge according to the balance control signal.
CN105653003A discloses a battery management unit, a battery management system, and a communication management method and system thereof, where the battery management unit includes a processing device, a working communication interface, an address setting interface and a selection switch, the processing device is connected to the battery cluster management unit or the address setting interface of the previous battery management unit through the working communication interface, and the address setting interface is connected to the working communication interface or the battery cluster management unit of the next battery management unit; one end of the selector switch is connected with the address setting interface, and the processing device controls the other end of the selector switch to be connected with the processing device, so that the address setting interface is connected with the processing device, and the plurality of battery management units form a daisy chain structure; the processing device controls the other end of the selection switch to be connected with the working communication interface, so that the address communication interface is connected with the working communication interface, and the plurality of battery management units form a bus structure.
CN102073017A discloses an intelligent detection platform and a detection method for a battery management system, wherein the platform includes a power management module, a voltage control module, a current control module, a temperature output control module, a processor control module, an input/output control module, a communication module and an upper computer module; the power management module, the voltage control module, the current control module, the input/output control module and the communication module are respectively connected with the processor control module, and meanwhile, the upper computer module is in data communication with the processor module through the communication module.
The main control, the slave control and the data, communication, control and circuit component power supply among the modules of the battery management system have quite complicated topological connection relations, and great difficulty is brought to the wiring design and assembly of the system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a connection system and a connection method for a sampling, communication and control link of a large lithium battery pack.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a connection system for sampling, communication and control links of a large lithium battery pack, the connection system comprising:
the battery module sampling units are used for acquiring various data of the battery modules, and each module sampling unit corresponds to one battery module;
the module sampling units are communicated and controlled with the battery management unit through the slave control bus units and are used for packaging and transmitting data acquired by the module sampling plate to the battery management unit;
the battery management units are communicated and controlled with the battery control unit through the main control bus board unit, and the main control bus unit is used for packaging data processed by the battery management units of the battery modules and transmitting the packaged data to the battery control unit;
the module sampling unit, the slave control bus unit and the master control bus unit form a three-layer linear connection network from a bottom layer to a top layer.
The invention adopts the three-layer circuit board module to convert the complex network topology connection into the linear connection of the circuit board, greatly improves the wiring design and the assembly composition of the system, and greatly improves the assembly efficiency and the connection reliability of the system.
In a preferred embodiment of the present invention, the coupling system is divided into a control line and a communication line.
As a preferred technical solution of the present invention, the unidirectional linear expansion of the control line routing from the top layer to the bottom layer includes: the battery control unit sends a control command, the control command is transmitted step by step through the master control bus unit, the battery management unit and the slave control bus unit in sequence and finally reaches the module sampling unit, and the control module sampling unit acquires various data of the battery module.
As a preferred technical solution of the present invention, the communication line is linearly developed from a bottom layer to a top layer in a unidirectional manner, and includes: the module sampling unit collects various data of the battery module, and the data are sequentially transmitted from the slave control bus unit, the battery management unit and the master control bus unit step by step and finally reach the battery control unit.
As a preferred technical scheme, the module sampling unit comprises a plurality of module sampling plates for collecting different types of data of the battery modules.
As a preferred technical solution of the present invention, the module sampling plate includes a voltage sampling plate and a temperature sampling plate, which are respectively used for collecting voltage data and temperature data of the battery module.
As a preferred technical solution of the present invention, the slave control bus unit provides a uniform slave control bus interface for each module sampling unit, and each module sampling unit summarizes data to the slave control bus unit through the slave control bus interface, and transmits the data to the battery management unit after being packaged by the slave control bus unit.
As a preferred technical solution of the present invention, the master control bus unit provides a uniform master control bus interface for each battery management unit, and each battery management unit collects data to the master control bus unit through the master control bus interface, and transmits the data to the battery control unit after being packed by the master control bus unit.
As a preferred technical solution of the present invention, the data transmission is realized between the main control bus unit and the battery control unit by means of a CAN communication bus.
In a second aspect, the invention provides a method for connecting a sampling, communication and control link of a large-scale lithium battery pack, wherein the connection system of the first aspect is adopted for sampling, communication and control link.
The connection method is divided into control line connection and communication line connection.
The communication line coupling includes:
the module sampling unit collects various data of the battery module, and the data are sequentially transmitted from the slave control bus unit, the battery management unit and the master control bus unit step by step and finally reach the battery control unit.
The control line coupling includes:
the battery control unit sends a control command, the control command is transmitted step by step through the master control bus unit, the battery management unit and the slave control bus unit in sequence and finally reaches the module sampling unit, and the control module sampling unit acquires various data of the battery module.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the three-layer circuit board module to convert the complex network topology connection into the linear connection of the circuit board, greatly improves the wiring design and the assembly composition of the system, and greatly improves the assembly efficiency and the connection reliability of the system.
Drawings
FIG. 1 is a functional block diagram of a joining method according to an embodiment of the present invention;
FIG. 2 is a functional block diagram of a modular sampling unit according to an embodiment of the present invention;
FIG. 3 is a functional block diagram of a slave bus unit in accordance with an embodiment of the present invention;
fig. 4 is a functional block diagram of a master bus unit according to an embodiment of the present invention.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
In one embodiment, the present invention provides a connection system for a sampling, communication and control link of a large lithium battery pack, which is shown in fig. 1 and includes:
the battery module sampling units are used for acquiring various data of the battery modules, and each module sampling unit corresponds to one battery module;
the module sampling units are communicated and controlled with the battery management unit through the slave control bus units and are used for packaging and transmitting data acquired by the module sampling plate to the battery management unit;
the battery management units are communicated and controlled with the battery control unit through the main control bus board unit, and the main control bus unit is used for packaging data processed by the battery management units of the battery modules and transmitting the packaged data to the battery control unit;
the module sampling unit, the slave control bus unit and the master control bus unit form a three-layer linear connection network from a bottom layer to a top layer.
The invention adopts the circuit board module with three layers, converts the complex network topology connection into the linear connection of the circuit board, greatly improves the wiring design and the assembly composition of the system, and greatly improves the assembly efficiency and the connection reliability of the system.
Further, the coupling system is divided into a control line and a communication line.
Further, the control line routing unidirectional linear deployment from top layer to bottom layer, comprising: the battery control unit sends a control command, the control command is transmitted step by step through the master control bus unit, the battery management unit and the slave control bus unit in sequence and finally reaches the module sampling unit, and the control module sampling unit acquires various data of the battery module.
Further, the communication line routing is a unidirectional linear expansion from bottom layer to top layer, and comprises: the module sampling unit collects various data of the battery module, and the data are sequentially transmitted from the slave control bus unit, the battery management unit and the master control bus unit step by step and finally reach the battery control unit.
Further, as shown in fig. 2, the module sampling unit includes a plurality of module sampling plates for collecting different types of data of the battery modules.
Further, module sampling board includes voltage sampling board and temperature sampling board, is used for gathering the voltage data and the temperature data of battery module respectively.
Further, as shown in fig. 3, the slave control bus unit provides a uniform slave control bus interface for each module sampling unit, and each module sampling unit summarizes data to the slave control bus unit through the slave control bus interface, and the data is packed by the slave control bus unit and then transmitted to the battery management unit.
Further, as shown in fig. 4, the master control bus unit provides a uniform master control bus interface for each battery management unit, and each battery management unit collects data to the master control bus unit through the master control bus interface, and transmits the data to the battery control unit after being packaged by the master control bus unit.
Furthermore, data transmission is realized between the main control bus unit and the battery control unit in a CAN communication bus mode.
In another embodiment, the invention provides a connection method of a sampling, communication and control link of a large lithium battery pack, wherein the connection method is divided into control line connection and communication line connection.
The communication line coupling includes:
the module sampling unit collects various data of the battery module, and the data are sequentially transmitted from the slave control bus unit, the battery management unit and the master control bus unit step by step and finally reach the battery control unit.
The control line coupling includes:
the battery control unit sends a control command, the control command is transmitted step by step through the master control bus unit, the battery management unit and the slave control bus unit in sequence and finally reaches the module sampling unit, and the control module sampling unit acquires various data of the battery module.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A coupling system for a large lithium battery pack sampling, communication and control link, the coupling system comprising:
the battery module sampling units are used for acquiring various data of the battery modules, and each module sampling unit corresponds to one battery module;
the module sampling units are communicated and controlled with the battery management unit through the slave control bus units and are used for packaging and transmitting data acquired by the module sampling plate to the battery management unit;
the battery management units are communicated and controlled with the battery control unit through the main control bus board unit, and the main control bus unit is used for packaging data processed by the battery management units of the battery modules and transmitting the packaged data to the battery control unit;
the module sampling unit, the slave control bus unit and the master control bus unit form a three-layer linear connection network from a bottom layer to a top layer.
2. A coupling system as claimed in claim 1, characterized in that the coupling system is divided into a control line and a communication line.
3. The coupling system of claim 2, wherein the unidirectional linear deployment of the control line routing top layer to bottom layer comprises: the battery control unit sends a control command, the control command is transmitted step by step through the master control bus unit, the battery management unit and the slave control bus unit in sequence and finally reaches the module sampling unit, and the control module sampling unit acquires various data of the battery module.
4. The coupling system of claim 3, wherein the communication line is routed in a unidirectional linear deployment from a bottom layer to a top layer, comprising: the module sampling unit collects various data of the battery module, and the data are sequentially transmitted from the slave control bus unit, the battery management unit and the master control bus unit step by step and finally reach the battery control unit.
5. The coupling system of claim 1, wherein the module sampling unit includes a number of module sampling plates for collecting different types of data of the battery modules.
6. The coupling system of claim 5, wherein the module sampling board comprises a voltage sampling board and a temperature sampling board for collecting voltage data and temperature data, respectively, of a battery module.
7. The coupling system of claim 1, wherein the slave bus unit provides a uniform slave bus interface for each module sampling unit, and each module sampling unit summarizes data to the slave bus unit through the slave bus interface, and packages the data by the slave bus unit and transmits the data to the battery management unit.
8. The connection system of claim 1, wherein the master bus unit provides a unified master bus interface for each battery management unit, and each battery management unit collects data to the master bus unit through the master bus interface, and transmits the data to the battery management unit after being packaged by the master bus unit.
9. The coupling system of claim 8, wherein the data transmission between the master bus unit and the battery control unit is achieved by means of a CAN communication bus.
10. A method for connecting a sampling, communication and control link of a large lithium battery pack, characterized in that the sampling, communication and control link is carried out by using the connection system of any one of claims 1 to 9;
the connection method comprises control line connection and communication line connection;
the communication line coupling includes:
the battery module sampling unit is used for acquiring various data of the battery module, and the data are sequentially transmitted stage by stage through the slave control bus unit, the battery management unit and the master control bus unit and finally reach the battery control unit;
the control line coupling includes:
the battery control unit sends a control command, the control command is transmitted step by step through the master control bus unit, the battery management unit and the slave control bus unit in sequence and finally reaches the module sampling unit, and the control module sampling unit acquires various data of the battery module.
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| CN202210072387.6A CN114497767A (en) | 2022-01-21 | 2022-01-21 | Connection system and connection method for sampling, communication and control link of large lithium battery pack |
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| CN205282605U (en) * | 2015-12-26 | 2016-06-01 | 惠州市蓝微新源技术有限公司 | Power battery module system |
| CN208849523U (en) * | 2018-10-31 | 2019-05-10 | 山东鲁能智能技术有限公司 | A kind of energy-storage battery differentiated control and control system |
| CN210519137U (en) * | 2019-06-24 | 2020-05-12 | 江西科然科技有限公司 | Main control unit case of battery management system |
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2022
- 2022-01-21 CN CN202210072387.6A patent/CN114497767A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203218952U (en) * | 2013-05-14 | 2013-09-25 | 姚志刚 | Electric automobile cell management system |
| CN105375583A (en) * | 2015-12-09 | 2016-03-02 | 合肥国盛电池科技有限公司 | Management system and method of power lithium battery pack |
| CN205282605U (en) * | 2015-12-26 | 2016-06-01 | 惠州市蓝微新源技术有限公司 | Power battery module system |
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