CN113594562A - Battery core, battery module, battery pack and electric automobile - Google Patents

Battery core, battery module, battery pack and electric automobile Download PDF

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Publication number
CN113594562A
CN113594562A CN202110902425.1A CN202110902425A CN113594562A CN 113594562 A CN113594562 A CN 113594562A CN 202110902425 A CN202110902425 A CN 202110902425A CN 113594562 A CN113594562 A CN 113594562A
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CN
China
Prior art keywords
module
main control
positive
acquisition module
acquisition
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Granted
Application number
CN202110902425.1A
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Chinese (zh)
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CN113594562B (en
Inventor
雷晶晶
陈斌斌
郑娅敏
廖思航
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Xinwangda Power Technology Co ltd
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Sunwoda Electric Vehicle Battery Co Ltd
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Application filed by Sunwoda Electric Vehicle Battery Co Ltd filed Critical Sunwoda Electric Vehicle Battery Co Ltd
Publication of CN113594562A publication Critical patent/CN113594562A/en
Priority to PCT/CN2021/143897 priority Critical patent/WO2023010798A1/en
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Publication of CN113594562B publication Critical patent/CN113594562B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The application discloses electricity core, battery module, battery package and electric automobile. The battery cell comprises: a housing provided with at least one opening; the cover plate is arranged at the opening end of the shell and used for packaging the opening end of the shell; the winding core is arranged in the shell and comprises a positive plate, a negative plate, a positive tab and a negative tab, the positive plate is connected with the positive tab, and the negative plate is connected with the negative tab; the positive pole and the negative pole are respectively arranged on the cover plate, the positive pole is connected with the positive lug, and the negative pole is connected with the negative lug; the acquisition circuit is arranged in the shell and comprises at least one chip, and the acquisition circuit is used for acquiring the working parameters of the winding core. The embodiment of the application can acquire the working parameters of the battery cell, so that the influence on the battery module and the like caused by neglecting and omitting certain single battery cell working states is avoided.

Description

Battery core, battery module, battery pack and electric automobile
Technical Field
The application relates to the technical field of battery cores, in particular to a battery core, a battery module, a battery pack and an electric automobile.
Background
At present, a battery module includes at least two cell cores.
In the related art, the battery management system needs to collect data of the battery module to perform operations such as charging, discharging, and safety protection on the battery module according to the collected data. However, the data acquired by the above operations cannot completely cover the data of all the battery cells in the battery module, so that the working states of some non-acquired single battery cells are easy to be ignored and omitted, and the safety of the battery module, the battery management system and the external equipment is affected.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. For this, this application provides an electricity core, battery module, battery package and electric automobile, can gather the working parameter of electricity core to avoided neglecting the influence of omitting and causing battery module etc. because of certain monomer electricity core operating condition.
The battery cell according to the embodiment of the first aspect of the application comprises: a housing provided with at least one opening; the cover plate is arranged at the opening end of the shell and used for packaging the opening end of the shell; the winding core is arranged in the shell and comprises a positive plate, a negative plate, a positive tab and a negative tab, the positive plate is connected with the positive tab, and the negative plate is connected with the negative tab; the positive pole and the negative pole are respectively arranged on the cover plate, the positive pole is connected with the positive lug, and the negative pole is connected with the negative lug; the acquisition circuit is arranged in the shell and comprises at least one chip, and the acquisition circuit is used for acquiring the working parameters of the winding core.
According to the battery cell provided by the embodiment of the application, at least the following beneficial effects are achieved: the battery core is subjected to operation such as working parameter acquisition through the acquisition circuit, so that the working states of the single battery cores are detected, and the influence on the battery module and the like caused by neglecting and omitting of certain working states of the single battery cores is avoided.
According to some embodiments of the application, the acquisition circuit comprises: the acquisition module is used for acquiring the working parameters of the winding core; the main control module is connected with the acquisition module and used for generating a control signal according to the working parameter; the communication module is connected with the main control module and used for sending the working parameters to external equipment according to the control signals and/or used for receiving external signals; the main control module is also used for controlling the working state of the winding core according to the external signal; the acquisition module, the main control module and the communication module are arranged on the same circuit board.
According to some embodiments of the application, the acquisition module comprises: the electric signal acquisition module is respectively connected with the winding core and the main control module, and is used for acquiring at least one of voltage parameters, current parameters and power parameters of the winding core.
According to some embodiments of the present application, the winding core further comprises a first collecting tab connected with the positive plate; one end of the electric signal acquisition module is connected with the first acquisition lug, and the other end of the electric signal acquisition module is connected with the negative pole post or the negative pole lug; and/or the winding core further comprises a second collecting tab, and the second collecting tab is connected with the negative plate; one end of the electric signal acquisition module is connected with the second acquisition tab, and the other end of the electric signal acquisition module is connected with the positive pole or the positive tab.
According to some embodiments of the application, further comprising: the first connecting piece is arranged in the shell, one end of the first connecting piece is connected with the positive lug, and the other end of the first connecting piece is connected with the electric signal acquisition module; the electric signal acquisition module is connected with the negative pole column or the negative pole lug; and/or the second connecting piece is arranged in the shell, one end of the second connecting piece is connected with the negative electrode lug, and the other end of the second connecting piece is connected with the electric signal acquisition module; the electric signal acquisition module is connected with the positive pole column or the positive pole ear.
According to some embodiments of the application, the acquisition module further comprises: the temperature acquisition module is connected with the main control module and is used for acquiring temperature parameters of the winding core; the temperature acquisition module is used for being connected with the positive pole and/or the negative pole.
According to some embodiments of the application, the acquisition module further comprises: the temperature acquisition module is connected with the main control module and is used for acquiring temperature parameters of the winding core; the temperature acquisition module is used for being connected with the first acquisition lug and/or the second acquisition lug.
According to some embodiments of the application, the acquisition module further comprises: the temperature acquisition module is connected with the main control module and is used for acquiring temperature parameters of the winding core; the winding core further comprises a diaphragm, and the diaphragm is arranged between the positive plate and the negative plate; the battery cell further comprises at least one temperature collection film, wherein the at least one temperature collection film is arranged between the diaphragm and the positive plate, or the at least one temperature collection film is arranged between the diaphragm and the negative plate; the temperature acquisition module is used for being connected with the temperature acquisition film.
According to some embodiments of the application, further comprising: the infrared transmitting module and the infrared receiving module; the infrared emission module is arranged in the shell and used for emitting infrared signals to the winding core; the infrared receiving module is arranged in the shell and used for receiving a reflected signal of the infrared signal; the acquisition module further comprises: the temperature acquisition module, the temperature acquisition module with host system connects, the temperature acquisition module be used for with infrared receiving module connects, the temperature acquisition module is used for right reflection signal calibrates and generates roll up the temperature parameter of core.
According to some embodiments of the application, further comprising: the explosion-proof valve is arranged on the cover plate; the acquisition module further comprises: the pressure acquisition module is respectively connected with the explosion-proof valve and the main control module and is used for acquiring the pressure parameters of the winding core.
According to some embodiments of the present application, the cover plate is provided with a through hole; the battery cell further comprises: the accommodating cavity is provided with an opening, the opening end of the accommodating cavity is covered on the circumference of the through hole, and the sealing element is used for sealing the through hole; the acquisition module further comprises: the pressure acquisition module is connected with the main control module and is used for acquiring the pressure parameters of the winding core.
According to some embodiments of the present application, the material of the seal is a piezoelectric material; wherein the pressure acquisition module is connected with the sealing element.
According to some embodiments of the application, the acquisition circuit further comprises: one end of the balancing module is connected with the main control module, and the other end of the balancing module is respectively connected with the positive electrode lug and the negative electrode lug; or one end of the balancing module is connected with the main control module, and the other end of the balancing module is respectively connected with the positive pole column and the negative pole column; the balancing module is used for carrying out balancing operation on the winding core according to the control signal; and/or the main control module is used for controlling the equalization module to perform equalization operation according to the external signal.
According to some embodiments of the present application, the equalization module comprises: one end of the equalizing resistor is connected with the positive lug or the positive post; the controllable end of the controllable switch is connected with the main control module, and the controllable switch is also connected with the other end of the balancing resistor and the negative pole lug respectively; or the controllable end of the controllable switch is connected with the main control module, and the controllable switch is also connected with the other end of the balancing resistor and the negative pole column respectively; the controllable switch is used for switching on or off according to the control signal; and/or the main control module is used for controlling the controllable switch to be switched on or switched off according to the external signal.
According to some embodiments of the application, the controllable switch comprises any one of an electronic switch, a MOS transistor and a transistor.
According to some embodiments of the application, the acquisition circuit further comprises: one end of the internal resistance detection module is connected with the main control module, and the other end of the internal resistance detection module is respectively connected with the positive electrode lug and the negative electrode lug; or one end of the internal resistance detection module is connected with the main control module, and the other end of the internal resistance detection module is respectively connected with the positive pole column and the negative pole column; the internal resistance detection module is used for detecting voltage change parameters of the winding core; the main control module is used for obtaining the internal resistance parameter of the winding core according to the voltage change parameter.
According to some embodiments of the present application, the internal resistance detection module comprises: the signal generation unit is respectively connected with the positive lug and the main control module; the signal generating unit is used for generating an excitation signal according to the control signal; one end of the detection resistor is connected with the signal generation unit, and the other end of the detection resistor is connected with the negative electrode tab; the analog-to-digital conversion unit is respectively connected with the positive lug, the detection resistor and the main control module, and is used for detecting the voltage change parameters of the winding core according to the excitation signal.
According to some embodiments of the application, the acquisition circuit further comprises: the power protection module, the one end of power protection module is used for being connected with external power source, the other end of power protection module with host system connects.
According to some embodiments of the present application, the power protection module comprises: the power supply isolation unit is used for connecting one end of the power supply isolation unit with an external power supply; and one end of the electric signal conversion unit is connected with the other end of the power isolation unit, the other end of the electric signal conversion unit is connected with the main control module, and the electric signal conversion unit is used for converting a power supply signal provided by the external power supply.
According to some embodiments of the present application, the communication module comprises: the first communication unit comprises an isolation subunit, one end of the isolation subunit is connected with the main control module, and the other end of the isolation subunit is used for being connected with the external equipment.
According to some embodiments of the present application, the communication module comprises: and the second communication unit is used for being connected with the external equipment in at least one mode of Bluetooth communication, radio frequency communication and Wi-Fi communication.
According to the battery module of the embodiment of the second aspect of the present application, including: a plurality of cells as described in any of the above embodiments.
According to the battery module of this application embodiment, have following beneficial effect at least: the working parameters of all the battery cells in the battery module can be acquired, so that the influence on the battery module caused by neglecting and omitting of the working state of a certain battery cell is avoided.
A battery pack according to an embodiment of a third aspect of the present application includes: at least one battery module as described in the above embodiments; and the battery management system is connected with the communication module of at least one battery cell.
According to the battery pack of the embodiment of the application, at least the following beneficial effects are achieved: the battery management system acquires the working parameters of each battery cell in the battery module through the communication module, so that the working state of each battery cell is detected, and the influence on a battery pack caused by neglecting and omitting of the working state of a certain battery cell is avoided.
An electric vehicle according to a fourth aspect of the present application includes at least one battery pack as described in the above embodiments.
According to the electric automobile of this application embodiment, have following beneficial effect at least: the battery management system acquires the working parameters of each battery cell in the battery module through the communication module, so that the working state of each battery cell is detected, and the influence on a battery pack and an electric automobile caused by neglecting and omitting of the working state of a certain battery cell is avoided.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present application;
FIG. 2 is a block diagram of an acquisition circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of an acquisition circuit according to an embodiment of the present disclosure;
FIG. 4 is another block diagram of an acquisition circuit according to an embodiment of the present disclosure;
fig. 5 is another schematic structural diagram of a battery cell according to an embodiment of the present application;
fig. 6 is another schematic structural diagram of a battery cell according to an embodiment of the present application;
fig. 7 is another schematic structural diagram of a battery cell according to an embodiment of the present application.
Reference numerals:
the battery comprises a battery cell 100, a shell 101, a cover plate 102, a winding core 103, a positive pole 104, a negative pole 105, an acquisition circuit 106, an opening 107, a positive pole tab 108, a negative pole tab 109, an acquisition module 110, a main control module 111, a communication module 112, an external device 113, an electric signal acquisition module 114, a first acquisition tab 115, a temperature acquisition module 116, a temperature acquisition film 117, an explosion-proof valve 118, a pressure acquisition module 119, a through hole 120, a containing cavity 121, a sealing element 122, an internal resistance detection module 123, a balancing module 124, a power protection module 125 and an external power supply 126.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, an embodiment of the present application provides a battery cell 100. The battery cell 100 includes a casing 101, a cover plate 102, a winding core 103, a positive post 104, a negative post 105, and an acquisition circuit 106. The housing 101 has at least one opening 107, and the cover plate 102 is disposed at the open end of the housing 101 and encloses the open end of the housing 101. The winding core 103 is arranged in the shell 101, the winding core 103 comprises a positive plate, a negative plate, a positive tab 108 and a negative tab 109, the positive plate is connected with the positive tab 108, and the negative plate is connected with the negative tab 109. The positive post 104 and the negative post 105 are respectively disposed on the cover plate 102, the positive post 104 is connected to the positive tab 108, and the negative post 105 is connected to the negative tab 109. Acquisition circuit 106 sets up in casing 101 inside, and acquisition circuit 106 includes at least one chip, and acquisition circuit 106 is used for gathering the operating parameter of core 103.
In particular, depending on the type of operating parameter of core 103 acquired, at least one chip is integrated on the PCB (or FPC) board, for example: if the working parameters comprise temperature parameters and pressure parameters, the temperature sensor and the pressure sensor can be integrated on the same PCB to form an acquisition circuit 106; or the acquisition circuit 106 is composed of an integrated chip, a connection harness, and other components (resistors, inductors, etc.), wherein the integrated chip can acquire different types of operating parameters. Acquisition circuit 106 sets up in the inside optional position of casing 101, and acquisition circuit 106 is used for carrying out operations such as working parameter collection to rolling up core 103 to the realization is to the detection of monomer electricity core 100 operating condition, has avoided neglecting the influence of omitting and causing battery module etc. because of some monomer electricity core 100 operating condition.
Referring to fig. 2, in some embodiments, the acquisition circuit 106 includes an acquisition module 110, a master control module 111, and a communication module 112. The acquisition module 110 is used for acquiring the working parameters of the winding core; the main control module 111 is connected with the acquisition module 110 and is used for generating a control signal according to the working parameter; the communication module 112 is connected to the main control module 111 and configured to send the operating parameters to the external device according to the control signal, and/or the communication module 112 is configured to receive the external signal. The main control module 111 is further configured to control a working state of the winding core according to an external signal. Specifically, when the acquisition circuit 106 is integrated by at least one chip on a PCB (or FPC board), the acquisition module 110, the main control module 111 and the communication module 112 may be respectively an independent chip on the PCB (or FPC board); when the acquisition circuit 106 is an integrated chip, the acquisition module 110, the main control module 111, and the communication module 112 are composed of different pins on the integrated chip and components (resistors, inductors, etc.) connected to the pins. The external device includes a device for managing and maintaining the Battery cells and the Battery modules, such as a BMS (Battery Management System). The main control module 111 is configured to process the working parameters acquired by the acquisition module 110, and send the processed working parameters to the external device through the communication module 112, so that the external device can determine the working state of the corresponding monomer battery cell according to the working parameters, thereby avoiding damage caused by neglecting the working state of the monomer battery cell.
The main control module 111 is further configured to receive an external signal of an external device through the communication module 112, and the main control module 111 controls working states of the corresponding monomer battery cell, such as charging and discharging, according to the external signal. Or the main control module 111 determines the processed working parameters according to a preset working strategy, and controls the working state of the corresponding single battery cell according to the determination result, so as to ensure the safety of the single battery cell. It is understood that the connection manner of the communication module 112 and the external device includes at least one of a wired connection and a wireless connection, and the embodiment of the present application is not particularly limited.
For example, referring to fig. 3, in some embodiments, the communication module 112 includes a first communication unit and/or a second communication unit. The first communication unit includes an isolation subunit, one end of the isolation subunit is connected to the main control module 111, and the other end of the isolation subunit is used to connect to the external device 113. The second communication unit is used for connecting with the external device 113 through at least one of bluetooth communication, radio frequency communication and Wi-Fi communication. Specifically, the communication mode between the battery cell and the external device 113 includes at least one of wired communication and wireless communication. When the communication mode comprises wired communication, the first communication unit comprises an isolation subunit to prevent signal interference. When the communication mode comprises wireless communication, at least one of wireless communication modes such as Bluetooth communication, radio frequency communication, Wi-Fi communication and the like can be used for signal transmission.
In some embodiments, the operating parameter collected by the collection circuit comprises at least one of an electrical signal parameter, a temperature parameter, a pressure parameter, and an internal resistance parameter. The following describes the acquisition of these four operating parameters in detail with reference to the features described in the above embodiments.
First, the acquisition of the electrical signal parameters will be specifically described. It is understood that when the collecting circuit is integrated by at least one chip on the PCB, the electrical signal collecting module can be a separate chip on the PCB (or FPC); when the acquisition circuit is an integrated chip, the electric signal acquisition module consists of a plurality of pins on the integrated chip and components connected with the pins.
Referring to fig. 3 and 4, in some embodiments, the acquisition module 110 includes an electrical signal acquisition module 114. The electric signal acquisition module 114 is respectively connected with the winding core 103 and the main control module 111, and the electric signal acquisition module 114 is used for acquiring electric signal parameters of the winding core 103. Specifically, the electrical signal parameter comprises at least one of a voltage parameter (V), a current parameter (I), and a power parameter (P). The collecting end of the electric signal collecting module 114 is attached to the winding core 103 to form an electric connection loop, so that at least one of voltage, current and power of the loop is collected. The electric signal acquisition module 114 is further connected to the main control module 111, the electric signal acquisition module 114 performs analog-to-digital conversion on the acquired electric signal parameters, and the main control module 111 determines the analog-to-digital converted electric signal parameters or sends the analog-to-digital converted electric signal parameters to the external device 113 through the communication module 112, so that electric signal detection on the single battery cell is realized. It is understood that in the embodiments of the present application and in each of the embodiments described below, the collection terminal includes a pin of a corresponding chip, a wire harness connected to the pin, and the like.
For example, referring to fig. 3 and 5, the winding core 103 may further include a first collecting tab 115 disposed on the positive electrode sheet and/or a second collecting tab (not shown) disposed on the negative electrode sheet in addition to the positive electrode tab 108 and the negative electrode tab 109. When the winding core 103 includes the first collecting tab 115, one end of the electrical signal collecting module 114 is connected to the first collecting tab 115, and the other end of the electrical signal collecting module 114 is connected to the negative pole post 105 or the negative pole tab, so as to form an electrical connection loop of the first collecting tab 115, the electrical signal collecting module 114, and the negative pole piece (or the negative pole tab 109). When the winding core 103 includes a second collecting tab, one end of the electrical signal collecting module 114 is connected to the second tab, and the other end of the electrical signal collecting module 114 is connected to the positive post 104 or the positive plate, so as to form an electrical connection loop of the positive post (or the positive post 104), the electrical signal collecting module 114, and the second collecting tab.
Or, the battery cell 100 further includes a first connecting member and/or a second connecting member, where the first connecting member and the second connecting member are any one of a wire harness, a PCB board, and an FPC board, and the first connecting member and the second connecting member are used to connect the electrical signal acquisition module 114 and the winding core, so that the electrical signal acquisition module 114 and the winding core form an electrical connection loop. Specifically, the first connecting member and the second connecting member are both disposed inside the housing 101, for example, disposed on a connecting surface of the cover plate 102 and the housing 101. One end of the first connecting piece is connected with the positive tab 108, the other end of the first connecting piece is connected with the electric signal acquisition module 114, and the electric signal acquisition module 114 is connected with the negative pole post 105 or the negative tab 109; one end of the second connecting piece is connected with the negative tab 109, the other end of the second connecting piece is connected with the electric signal acquisition module 114, and the electric signal acquisition module 114 is connected with the positive post 104 or the positive tab 108, so that the electric signal acquisition module 114 can realize the electric signal acquisition of the winding core through the first connecting piece and/or the second connecting piece.
Next, the collection of the temperature parameter will be specifically described. It is understood that when the collecting circuit is integrated by at least one chip on the PCB, the temperature collecting module may be a separate chip on the PCB; when the acquisition circuit is an integrated chip, the temperature acquisition module consists of a plurality of pins on the integrated chip and components connected with the pins.
Referring to fig. 4, in some embodiments, the acquisition module 110 further includes a temperature acquisition module 116. The temperature acquisition module 116 is connected with the main control module 111, and the temperature acquisition module 116 is used for acquiring the temperature parameters of the winding core. Wherein, the temperature acquisition module 116 is used for connecting with the positive pole and/or the negative pole of the winding core. Specifically, the collection end of the temperature collection module 116 is attached to the positive pole and/or the negative pole of the winding core to collect the temperature parameter of the winding core. The main control module 111 and/or the external device 113 determine whether the battery cell has an excessively large charging current, a decreased electrolyte, an excessively high ambient temperature, or the like according to the temperature parameter. When the battery core is in the above condition, the main control module 111 actively cuts off the power supply line of the winding core according to an external signal sent by the external device 113 and/or the main control module 111, so as to suspend the operation of the battery core, thereby ensuring the safety of the battery core and the external environment.
In some embodiments, the first and second collection tabs may be used in connection with the temperature collection module 116 in addition to being used in connection with the electrical signal collection module 110, i.e., the first and second collection tabs may mediate electrical signal collection and/or temperature collection. It is understood that the lengths of the first collecting tab and the second collecting tab may be greater than, less than, or equal to the length of the positive tab, and the lengths of the positive tab and the negative tab may be equal or unequal, which is not limited in this application.
Referring to fig. 6, in some embodiments, a separator (not shown) is disposed between the positive and negative plates of the winding core 103 and is used to separate the positive and negative plates to prevent the positive and negative plates from contacting and shorting the winding core 103. The battery cell 100 further includes at least one temperature-sensing film 117, where the at least one temperature-sensing film 117 is disposed between the separator and the positive plate, or between the separator and the negative plate. Specifically, a temperature acquisition film 117 is inserted between the positive plate and the diaphragm, and/or between the negative plate and the diaphragm, and the temperature acquisition film 117 is used for acquiring the temperature parameters of the positive plate and/or the negative plate. One end of the temperature collection film 117 is connected to the temperature collection module described in any of the above embodiments, and the temperature collection film 117 is further configured to send the collected temperature parameters to the temperature collection module, so that at least one of the temperature collection module, the main control module, and the external device controls the operating state of the battery cell 100 according to the temperature parameters and/or the processed temperature parameters. It is understood that the temperature control film 117 may be attached to any one of the diaphragm, the positive plate, and the negative plate, or there is a gap between the temperature control film 117 and the positive plate, the negative plate, and the diaphragm, and the size of the gap and the specific attachment position of the temperature control film 117 may be adaptively adjusted according to the temperature control accuracy or other conditions. The depth of the temperature control film 117 inserted into the winding core 103 may be adjusted adaptively according to actual conditions, and this embodiment of the present invention is not particularly limited.
In some embodiments, the battery cell 100 further includes an infrared transmitting module and an infrared receiving module. The infrared emission module is arranged in the shell 101 and is used for emitting infrared signals to the winding core 103; the infrared receiving module is disposed inside the casing 101, and the infrared receiving module is configured to receive a reflected signal of the infrared signal. The acquisition module still includes temperature acquisition module, and temperature acquisition module is connected with host system, and temperature acquisition module is used for being connected with infrared receiving module, and temperature acquisition module is used for calibrating reflection signal and generates the temperature parameter of rolling up core 103.
Specifically, the infrared emission module is configured to generate an infrared signal according to a control signal sent by the main control module, or the main control module is configured to control the infrared emission module to generate an infrared signal according to an external signal sent by an external device. The emitting end of the infrared emitting module is arranged towards the direction of the winding core 103 so that the infrared signal can be reflected at the winding core 103 and generate a corresponding reflected signal. The infrared receiving module receives the reflection signal and sends the reflection signal to the main control module, the main control module analyzes and processes the reflection signal, or the main control module sends the reflection signal to an external device through the communication module to analyze and process the reflection signal, so that the temperature parameter of the winding core carried by the reflection signal is obtained, and the temperature detection of the winding core 103 is realized.
In addition, the acquisition of the pressure parameter is specifically explained. It is understood that when the collection circuit is integrated by at least one chip on the PCB, the pressure collection module may be a separate chip on the PCB; when the acquisition circuit is an integrated chip, the pressure acquisition module consists of a plurality of pins on the integrated chip and components connected with the pins.
Referring to fig. 4 and 6, in some embodiments, the battery cell 100 further includes an explosion-proof valve 118, and the explosion-proof valve 118 is disposed on the cover plate 102. The acquisition module 110 further comprises a pressure acquisition module 119, the pressure acquisition module 119 is respectively connected with the explosion-proof valve 118 and the main control module 111, and the pressure acquisition module 119 is used for acquiring pressure parameters of the winding core 103. Specifically, the cover plate 102 is provided with a through hole, and the explosion-proof valve 118 is disposed at and seals the through hole. During the operation of the battery cell 100, gas may be generated inside the battery cell 100, and the gas may cause the gas pressure inside the casing 101 to gradually increase, so that the battery cell 100 may swell, leak, and burst the diaphragm. Therefore, when the gas pressure in the casing 101 is too high, the gas in the casing 101 will burst the explosion-proof valve 118 and be discharged from the explosion-proof valve 118 to the external environment, so as to ensure the safety of the battery cell 100 and the external device 113. The collection end of the pressure collection module 119 is arranged at any position inside the casing 101, the pressure collection module 119 is used for collecting pressure parameters inside the casing 101, and the main control module 111 or the external device 113 judges the air pressure inside the casing 101 according to the pressure parameters. When the pressure parameter is greater than the preset threshold, the main control module 111 or the external device 113 controls the explosion-proof valve 118 to open and/or perform other emergency operations, so as to perform timely early warning protection on the battery cell 100. It is understood that the emergency operation may include suspending the charging operation of winding core 103, and the like, and the embodiment of the present application is not particularly limited. The preset threshold may be adaptively set according to actual conditions, and the embodiment of the present application is not particularly limited.
Referring to fig. 4 and 7, in some embodiments, a through hole 120 is formed in the cover plate 102 of the battery cell 100, the battery cell 100 further includes a receiving cavity 121 and a sealing member 122, the receiving cavity 121 is provided with an opening, an open end of the receiving cavity 121 is covered on the circumference of the through hole 120, and the sealing member 122 is used for sealing the through hole 120. The acquisition module 110 further comprises a pressure acquisition module 119, the pressure acquisition module 119 is connected with the main control module 111, and the pressure acquisition module 119 is used for acquiring the pressure parameters of the winding core. Specifically, a through hole 120 is formed in the cover plate 102, the receiving cavity 121 is used for sealing the through hole 120 facing the external environment side, and the sealing member 122 is used for sealing the through hole 120 facing the housing interior side, so as to form a sealed cavity between the receiving cavity 121 and the sealing member 122. The sealing element 122 is made of a piezoelectric material or a deformable material, when the sealing element 122 is made of the piezoelectric material, the sealing element 122 is pressed by gas in the casing to generate a voltage, the collecting end of the pressure collecting module 119 is attached to the surface of the sealing element 122, and the pressure collecting module 119 is used for collecting the voltage and forming a pressure parameter according to the voltage. When the sealing member 122 is made of a deformable material, the collecting end of the pressure collecting module 119 is disposed in a sealing cavity formed by the accommodating cavity 121 and the sealing member 122, or the collecting end of the pressure collecting module 119 is attached to the sealing member 122. Taking the example that the collection end of the pressure collection module 119 is disposed in the sealed cavity, when the gas pressure inside the housing increases, the sealing element 122 is pressed by the gas to deform toward the sealed cavity, so as to increase the gas pressure inside the sealed cavity. The pressure acquisition module 119 is configured to acquire a pressure parameter in the sealed cavity, and send the pressure parameter to the main control module 111, so as to obtain a pressure parameter of the winding core according to the pressure parameter in the sealed cavity. When the pressure parameter in the sealed cavity is greater than the preset threshold value, it indicates that the gas pressure of the environment where the winding core is located is too large, and at this time, the main control module 111 or the external device 113 controls the explosion-proof valve to be opened and/or perform other emergency operations, so as to perform timely early warning protection on the battery cell 100.
And finally, the acquisition of the internal resistance parameters is specifically explained. It can be understood that, when the acquisition circuit is formed by integrating at least one chip on the PCB, the internal resistance detection module may be an independent chip on the PCB; when the acquisition circuit is an integrated chip, the internal resistance detection module consists of a plurality of pins on the integrated chip and components connected with the pins.
Referring to fig. 3 and 4, in some embodiments, the acquisition circuit further includes an internal resistance detection module 123, where the internal resistance detection module 123 is configured to detect a voltage variation parameter of the winding core, and the main control module 111 obtains the internal resistance parameter of the winding core according to the voltage variation parameter. One end of the internal resistance detection module 123 is electrically connected with the main control module 111, and the other end of the internal resistance detection module 123 is respectively connected with the positive electrode tab and the negative electrode tab. Or, one end of the internal resistance detection module 123 is connected to the main control module 111, and the other end of the internal resistance detection module 123 is connected to the positive pole and the negative pole, respectively. Specifically, the internal resistance of the battery cell includes an ohmic internal resistance and a polarization internal resistance, and in the embodiment of the present application, the type of the internal resistance is not specifically limited, so that the following description specifically describes the internal resistance as a general term of the ohmic internal resistance and the polarization internal resistance. The internal resistance of the battery cell is an important factor influencing the power performance and the discharge efficiency of the battery cell, and the battery cell is continuously aged and the internal resistance of the battery cell is continuously increased along with the increase of the storage time of the battery cell. Therefore, the power performance and the service life of the battery cell can be judged through the internal resistance parameter.
In some specific embodiments, the internal resistance detection module 123 includes a signal generation unit, a detection resistor R1, and an analog-to-digital conversion unit (ADC). The signal generating unit is respectively connected with the positive tab and the main control module 111, and the signal generating unit is used for generating an excitation signal according to the control signal. One end of the detection resistor R1 is connected with the signal generating unit, and the other end of the detection resistor R1 is connected with the negative electrode tab. The analog-to-digital conversion unit is respectively connected with the positive lug, the detection resistor R1 and the main control module 111, and the analog-to-digital conversion unit is used for detecting the voltage change parameters of the winding core according to the excitation signal. Specifically, the signal generating unit is connected in series with the detection resistor R1, the signal generating unit comprises a sine wave generator and other components used for generating an excitation signal, the signal generating unit is used for loading an alternating current input with a smaller amplitude value on a positive tab and a negative tab of the winding core according to a control signal to serve as the excitation signal, and the analog-to-digital conversion unit is used for detecting the change condition of the voltage at two ends (the positive tab and the negative tab) of the winding core and obtaining a voltage change parameter. The main control module 111 analyzes and processes the voltage change parameter, or the main control module 111 sends the voltage change parameter to the external device 113 through the communication module to analyze and process, so as to obtain the internal resistance parameter of the winding core. The main control module 111 or the external device 113 determines the power performance and/or the remaining usable life of the core according to the internal resistance parameter, and controls the operating state of the core according to the power performance and/or the remaining usable life.
Referring to fig. 3 and 4, in some embodiments, the acquisition circuit 106 further includes an equalization module 124. One end of the balancing module 124 is connected to the main control module 111, and the other end of the balancing module 124 is connected to the positive electrode tab and the negative electrode tab, respectively. Or, one end of the balancing module 124 is connected to the main control module 111, and the other end of the balancing module 124 is connected to the positive pole and the negative pole, respectively. The equalizing module 124 is configured to perform an equalizing operation on the winding core according to the control signal, and/or the main control module 111 is configured to control the equalizing module 124 to perform an equalizing operation according to an external signal. Specifically, the battery module includes a plurality of battery cells as described in the above embodiments, and because the voltage or the state of charge of each battery cell is not completely consistent when leaving the factory, or the battery cell leaks electricity or self-discharge and other phenomena occur over time, the charging demand or the discharging demand of each battery cell in the battery module is inconsistent. Therefore, the battery management system needs to perform balance management on the battery cells in the battery module so as to ensure that the battery cells in the battery module have the same charge state. In this embodiment of the application, the main control module 111 generates a control signal to control the equalizing module 124 to perform the equalizing operation on the core, and/or the main control module 111 receives an external signal sent by the external device 113 through the communication module, and controls the equalizing module 124 to perform the equalizing operation on the core according to the external signal. The equalization operation includes a passive equalization operation and an active equalization operation, and the passive equalization operation is specifically described as an example below.
The equalization module 124 includes an equalization resistor R2 and a controllable switch K1. One end of the equalizing resistor R2 is connected to the positive tab or post. The controllable end of the controllable switch K1 is connected with the main control module 111, and the controllable switch K1 is also connected with the other end of the balancing resistor R2 and the negative pole lug respectively; or, the controllable end of the controllable switch K1 is connected to the main control module 111, and the controllable switch K1 is further connected to the other end of the balancing resistor R2 and the negative pole, respectively. The controllable switch K1 is used for switching on or off according to a control signal; and/or the main control module 111 is used for controlling the controllable switch K1 to be switched on or off according to an external signal. Specifically, the equalizing resistor R2 is connected in series with the controllable switch K1, and the controllable switch K1 includes any one of an electronic switch, a MOS transistor, and a transistor. The main control module 111 is switched on by controlling the controllable switch K1, so that the equalizing resistor R2 is switched on with the series loop of the winding core, and the equalizing module 124 converts the redundant energy of the winding core into heat energy by using the equalizing resistor R2, so as to consume the redundant energy of the winding core with a high charge state, thereby realizing the charge state balance of each electric core in the battery module.
Referring to fig. 3 and 4, in some embodiments, the acquisition circuit further includes a power protection module 125. One end of the power protection module 125 is used for connecting with an external power source 126, and the other end of the power protection module 125 is connected with the main control module 111. Specifically, the acquisition circuit 106 is powered by an external power supply 126, and when the acquisition circuit 106 is formed by integrating at least one chip on a PCB, the power protection module 125 may be an independent chip on the PCB; when the acquisition circuit 106 is an integrated chip, the power protection module 125 is composed of a plurality of pins on the integrated chip and components connected to the pins. The power protection module 125 includes a power isolation unit and an electrical signal transformation unit, and one end of the power isolation unit is used for being connected with an external power supply 126; one end of the electrical signal transformation unit is connected with the other end of the power isolation unit, the other end of the electrical signal transformation unit is connected with the main control module 111, and the electrical signal transformation unit is used for transforming the power supply signal provided by the external power supply 126. For example, the power isolation unit includes a power isolation transformer, the electrical signal transformation unit includes a charge pump, a diode, an under-voltage protector, an LDO (Low Dropout Regulator), and the like, and the electrical signal transformation unit is configured to perform voltage variation and the like on a power supply signal provided by the external power source 126 to meet a power supply requirement of the acquisition circuit 106 and protect power supply safety of the acquisition circuit 106. It can be understood that the components included in the power isolation unit and the electrical signal conversion unit can also be adaptively selected according to actual conditions, and the embodiment of the present application is not particularly limited.
The embodiment of the application also provides a battery module, which comprises a plurality of battery cores described in any one of the above embodiments.
The embodiment of the application also provides a battery pack, which comprises at least one battery module and a battery management system, wherein the battery module and the battery management system are described in the embodiment, and the battery management system is connected with the communication module of at least one battery core. Specifically, the battery management system is used for being connected with the communication module of each single electric core in the battery pack, so that the detection of the working state of each single electric core is realized, and the influence on the battery module and the like caused by neglecting and omitting certain single electric core working states is avoided.
The embodiment of the application also provides an electric automobile which comprises at least one battery pack as described in the embodiment.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims (24)

1. Electric core, its characterized in that includes:
a housing provided with at least one opening;
the cover plate is arranged at the opening end of the shell and used for packaging the opening end of the shell;
the winding core is arranged in the shell and comprises a positive plate, a negative plate, a positive tab and a negative tab, the positive plate is connected with the positive tab, and the negative plate is connected with the negative tab;
the positive pole and the negative pole are respectively arranged on the cover plate, the positive pole is connected with the positive lug, and the negative pole is connected with the negative lug;
the acquisition circuit is arranged in the shell and comprises at least one chip, and the acquisition circuit is used for acquiring the working parameters of the winding core.
2. The electrical core of claim 1, wherein the acquisition circuit comprises:
the acquisition module is used for acquiring the working parameters of the winding core;
the main control module is connected with the acquisition module and used for generating a control signal according to the working parameter;
the communication module is connected with the main control module and used for sending the working parameters to external equipment according to the control signals and/or used for receiving external signals;
the main control module is also used for controlling the working state of the winding core according to the external signal; the acquisition module, the main control module and the communication module are arranged on the same circuit board.
3. The cell of claim 2, wherein the acquisition module comprises:
the electric signal acquisition module is respectively connected with the winding core and the main control module, and is used for acquiring at least one of voltage parameters, current parameters and power parameters of the winding core.
4. The battery cell of claim 3, wherein the winding core further comprises a first collecting tab, and the first collecting tab is connected with the positive plate;
one end of the electric signal acquisition module is connected with the first acquisition lug, and the other end of the electric signal acquisition module is connected with the negative pole post or the negative pole lug;
and/or the presence of a gas in the gas,
the winding core further comprises a second collecting lug, and the second collecting lug is connected with the negative plate;
one end of the electric signal acquisition module is connected with the second acquisition tab, and the other end of the electric signal acquisition module is connected with the positive pole or the positive tab.
5. The cell of claim 3, further comprising:
the first connecting piece is arranged in the shell, one end of the first connecting piece is connected with the positive lug, and the other end of the first connecting piece is connected with the electric signal acquisition module; the electric signal acquisition module is connected with the negative pole column or the negative pole lug;
and/or the presence of a gas in the gas,
the second connecting piece is arranged in the shell, one end of the second connecting piece is connected with the negative electrode lug, and the other end of the second connecting piece is connected with the electric signal acquisition module; the electric signal acquisition module is connected with the positive pole column or the positive pole ear.
6. The electrical core of any of claims 2 to 5, wherein the acquisition module further comprises: the temperature acquisition module is connected with the main control module and is used for acquiring temperature parameters of the winding core;
the temperature acquisition module is used for being connected with the positive pole and/or the negative pole.
7. The cell of claim 4, wherein the acquisition module further comprises: the temperature acquisition module is connected with the main control module and is used for acquiring temperature parameters of the winding core;
the temperature acquisition module is used for being connected with the first acquisition lug and/or the second acquisition lug.
8. The electrical core of any of claims 2 to 5, wherein the acquisition module further comprises: the temperature acquisition module is connected with the main control module and is used for acquiring temperature parameters of the winding core;
the winding core further comprises a diaphragm, and the diaphragm is arranged between the positive plate and the negative plate; the battery cell further comprises at least one temperature collection film, wherein the at least one temperature collection film is arranged between the diaphragm and the positive plate, or the at least one temperature collection film is arranged between the diaphragm and the negative plate;
the temperature acquisition module is used for being connected with the temperature acquisition film.
9. The electrical core of any of claims 2 to 5, further comprising: the infrared transmitting module and the infrared receiving module; the infrared emission module is arranged in the shell and used for emitting infrared signals to the winding core; the infrared receiving module is arranged in the shell and used for receiving a reflected signal of the infrared signal;
the acquisition module further comprises: the temperature acquisition module, the temperature acquisition module with host system connects, the temperature acquisition module be used for with infrared receiving module connects, the temperature acquisition module is used for right reflection signal calibrates and generates roll up the temperature parameter of core.
10. The electrical core of any of claims 2 to 5, further comprising: the explosion-proof valve is arranged on the cover plate;
the acquisition module further comprises: the pressure acquisition module is respectively connected with the explosion-proof valve and the main control module and is used for acquiring the pressure parameters of the winding core.
11. The electrical core according to any of claims 2 to 5, wherein the cover plate is provided with a through hole;
the battery cell further comprises: the accommodating cavity is provided with an opening, the opening end of the accommodating cavity is covered on the circumference of the through hole, and the sealing element is used for sealing the through hole;
the acquisition module further comprises: the pressure acquisition module is connected with the main control module and is used for acquiring the pressure parameters of the winding core.
12. The cell of claim 11, wherein the material of the seal is a piezoelectric material;
wherein the pressure acquisition module is connected with the sealing element.
13. The electrical core of any of claims 2 to 5, wherein the acquisition circuit further comprises:
one end of the balancing module is connected with the main control module, and the other end of the balancing module is respectively connected with the positive electrode lug and the negative electrode lug; or one end of the balancing module is connected with the main control module, and the other end of the balancing module is respectively connected with the positive pole column and the negative pole column;
the balancing module is used for carrying out balancing operation on the winding core according to the control signal; and/or the main control module is used for controlling the equalization module to perform equalization operation according to the external signal.
14. The cell of claim 13, wherein the equalization module comprises:
one end of the equalizing resistor is connected with the positive lug or the positive post;
the controllable end of the controllable switch is connected with the main control module, and the controllable switch is also connected with the other end of the balancing resistor and the negative pole lug respectively; or the controllable end of the controllable switch is connected with the main control module, and the controllable switch is also connected with the other end of the balancing resistor and the negative pole column respectively;
the controllable switch is used for switching on or off according to the control signal; and/or the main control module is used for controlling the controllable switch to be switched on or switched off according to the external signal.
15. The electrical core of claim 14, wherein the controllable switch comprises any one of an electronic switch, a MOS transistor, and a transistor.
16. The electrical core of claim 14 or 15, wherein the acquisition circuit further comprises:
one end of the internal resistance detection module is connected with the main control module, and the other end of the internal resistance detection module is respectively connected with the positive electrode lug and the negative electrode lug; or one end of the internal resistance detection module is connected with the main control module, and the other end of the internal resistance detection module is respectively connected with the positive pole column and the negative pole column; the internal resistance detection module is used for detecting voltage change parameters of the winding core;
the main control module is used for obtaining the internal resistance parameter of the winding core according to the voltage change parameter.
17. The electrical core of claim 16, wherein the internal resistance detection module comprises:
the signal generation unit is respectively connected with the positive lug and the main control module; the signal generating unit is used for generating an excitation signal according to the control signal;
one end of the detection resistor is connected with the signal generation unit, and the other end of the detection resistor is connected with the negative electrode tab;
the analog-to-digital conversion unit is respectively connected with the positive lug, the detection resistor and the main control module, and is used for detecting the voltage change parameters of the winding core according to the excitation signal.
18. The electrical core of claim 17, wherein the acquisition circuit further comprises:
the power protection module, the one end of power protection module is used for being connected with external power source, the other end of power protection module with host system connects.
19. The cell of claim 18, wherein the power protection module comprises:
the power supply isolation unit is used for connecting one end of the power supply isolation unit with an external power supply;
and one end of the electric signal conversion unit is connected with the other end of the power isolation unit, the other end of the electric signal conversion unit is connected with the main control module, and the electric signal conversion unit is used for converting a power supply signal provided by the external power supply.
20. The electrical core of any of claims 2 to 5, wherein the communication module comprises:
the first communication unit comprises an isolation subunit, one end of the isolation subunit is connected with the main control module, and the other end of the isolation subunit is used for being connected with the external equipment.
21. The electrical core of any of claims 2 to 5, wherein the communication module comprises:
and the second communication unit is used for being connected with the external equipment in at least one mode of Bluetooth communication, radio frequency communication and Wi-Fi communication.
22. Battery module, its characterized in that includes: a plurality of cells of any of claims 1 to 21.
23. A battery pack, comprising:
at least one battery module according to claim 22;
and the battery management system is connected with the communication module of at least one battery cell.
24. Electric vehicle, characterized in that it comprises at least one battery pack according to claim 23.
CN202110902425.1A 2020-09-29 2021-08-06 Battery cell, battery module, battery pack and electric automobile Active CN113594562B (en)

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