CN215451515U - Battery cell, battery system and electric automobile - Google Patents

Battery cell, battery system and electric automobile Download PDF

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Publication number
CN215451515U
CN215451515U CN202121382989.9U CN202121382989U CN215451515U CN 215451515 U CN215451515 U CN 215451515U CN 202121382989 U CN202121382989 U CN 202121382989U CN 215451515 U CN215451515 U CN 215451515U
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China
Prior art keywords
battery
battery cell
temperature measuring
plate
diaphragm
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Active
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CN202121382989.9U
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Chinese (zh)
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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    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

The utility model discloses a battery cell, a battery system and an electric automobile, wherein the battery cell comprises: a housing having an opening; the cover plate is arranged at one end of the opening and used for packaging the opening; the winding core is accommodated in the shell and is provided with a positive plate, a negative plate and a diaphragm for separating the positive plate from the negative plate; and the temperature measuring device is arranged in the shell, and one end of the temperature measuring device extends into the space between the positive plate and the diaphragm and/or extends into the space between the negative plate and the diaphragm. The battery cell according to the first aspect of the utility model has the following beneficial effects: the temperature inside the battery cell can be accurately detected.

Description

Battery cell, battery system and electric automobile
Technical Field
The utility model relates to the technical field of power batteries, in particular to a battery core, a battery system and an electric automobile.
Background
The power battery system of the existing new energy automobile generally forms a battery module through a plurality of monomer battery cores, and then forms a power battery through a plurality of battery modules to supply power for operation. Although a Battery Management System (BMS) in the related art monitors conditions of the battery module, such as temperature, pressure, etc., the sensors are generally disposed at intervals on the outer circumference of the battery module to detect the conditions of the entire battery module. However, the conditions inside each cell cannot be monitored effectively, which may result in failure of the cell being monitored. Because the actual conditions of each battery cell cannot be monitored in real time by the battery management system, when a certain battery cell has a problem, the problem cannot be found in time, so that the management efficiency of the battery management system is influenced, and the safety fault of the automobile is caused.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the problems in the prior art. Therefore, the utility model provides the battery cell which can accurately detect the temperature inside the battery cell. In addition, the utility model also provides a battery system with the battery cell and an electric automobile.
The battery cell according to the first aspect of the utility model comprises: a housing having an opening; the cover plate is arranged at one end of the opening and used for packaging the opening; the winding core is accommodated in the shell and is provided with a positive plate, a negative plate and a diaphragm for separating the positive plate from the negative plate; and the temperature measuring device is arranged in the shell, and one end of the temperature measuring device extends into the space between the positive plate and the diaphragm and/or extends into the space between the negative plate and the diaphragm.
The battery cell according to the first aspect of the utility model has the following beneficial effects: the temperature inside the battery cell can be accurately detected.
In some embodiments, the temperature measuring device comprises a thin film temperature sensor, and one end of the thin film temperature sensor extends between the positive plate and the diaphragm or between the negative plate and the diaphragm.
In some embodiments, one end of the thin-film temperature sensor extends from the middle of the winding core in the length direction between the positive electrode sheet and the separator or between the negative electrode sheet and the separator.
In some embodiments, the temperature measuring device includes a plurality of thin-film temperature sensors, and, among the plurality of thin-film temperature sensors, an end of at least one of the thin-film temperature sensors extends between the positive electrode sheet and the separator, and an end of at least one of the thin-film temperature sensors extends between the negative electrode sheet and the separator.
In some embodiments, the other end of the thin-film temperature sensor is disposed inside the cover plate.
In some embodiments, the thin film temperature sensor comprises: a substrate; a temperature measuring part disposed on the substrate; and the film encapsulates the substrate and the temperature measuring part.
In some embodiments, the thermometric section comprises a layer of thermally sensitive material disposed on the substrate.
In some embodiments, the thermometric section comprises at least one thermometric element disposed on the substrate.
In some embodiments, the thermometric element is selected from at least one of a thermocouple and a thermistor.
In some embodiments, the substrate has a circuit printed thereon, and the thermometric section is connected to the circuit.
In some embodiments, the material of the film is selected from: one of polyimide, PET plastic, polyetheretherketone, aramid or aromatic polyamide, epoxy resin and silicone rubber.
The battery system according to the second aspect of the present invention includes a power supply battery and a battery management system, wherein the power supply battery is formed by electrically connecting a plurality of battery cells according to any one of the above descriptions, and the battery management system is respectively in communication connection with the temperature measuring devices of the battery cells.
According to the battery system of the second aspect of the utility model, the following advantages are provided: the temperature inside each battery cell in the power supply battery can be accurately monitored.
The electric automobile according to the third aspect of the utility model comprises the battery system.
According to the electric automobile of the third aspect of the utility model, the following beneficial effects are achieved: the management efficiency and safety of the battery system can be improved.
Drawings
Fig. 1 is an exploded view of one embodiment of a cell of the present invention.
Fig. 2 is a cross-sectional view of a cell.
Fig. 3 is a partially enlarged view at C in fig. 2.
FIG. 4 is a schematic cross-sectional view of one embodiment of the thin film temperature sensor of FIG. 1.
Fig. 5 is a schematic diagram of a battery system having cells of the present invention.
Fig. 6 is a schematic diagram of an electric vehicle having the battery system of fig. 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the 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 invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Fig. 1 is an exploded view of a battery cell 100, fig. 2 is a cross-sectional view of the battery cell 100, and in fig. 2, the cross-section is taken along a position of the battery cell 100 where a temperature measuring device 104 is provided, and for convenience of illustration, a positive electrode tab 119 and a negative electrode tab 120 of a winding core 103 and a separator 121 provided between the positive electrode tab 119 and the negative electrode tab 120 are exaggeratedly shown, and fig. 3 is a partially enlarged view at C in fig. 2. Referring to fig. 1 to 3, a battery cell 100 according to the present embodiment includes: case 101, lid 102, core 103, and temperature measuring device 104 disposed in case 101. Wherein the housing 101 has an opening 105. The cover plate 102 is disposed at one end of the opening 105 and encloses the opening 105. The winding core 103 is housed in the case 101, and the winding core 103 has a positive electrode tab 119, a negative electrode tab 120, and a separator 121 that separates the positive electrode tab 119 and the negative electrode tab 120. One end of the temperature measuring device 104 extends between the positive electrode sheet 119 and the separator 121, and/or between the negative electrode sheet 120 and the separator 121.
In the battery cell 100 of the present embodiment, the temperature measurement device 104 is provided inside the battery cell 100, so that the temperature inside the battery cell 100 can be accurately detected.
Specifically, during the charge and discharge of the battery cell 100, the complicated electrochemical reaction occurs inside the battery cell to generate heat, and the heat is accompanied by physical heat generation due to some impedance, which directly affects important performances such as the cycle life and safety of the battery. With the increasing market demand for high power density, low cost, high capacity, fast charge, and other battery products, thermal management of batteries has also become critical. Currently, real-time monitoring of the temperature of the battery cell 100 is mostly limited to the surface temperature, for example, the heat distribution inside the battery cell is presumed according to the surface temperature of the battery cell and is an important basis for the thermal management of the battery module, but this may be very inaccurate because the temperature between the outer surface of the battery cell and the inner core may even differ by more than 30 ℃.
In this embodiment, the temperature measuring device 104 is disposed inside the battery cell 100, so that the temperature inside the battery cell 100 can be accurately detected. In the internal structure of the battery cell 100, the temperature parameter of the electrolyte is one of the temperature parameters that can accurately reflect the inside of the battery cell 100. Therefore, by providing the temperature measuring device 104 having one end extending between the positive electrode sheet 119 and the separator 121 and/or between the negative electrode sheet 120 and the separator 121, the temperature measuring device 104 can be brought into direct contact with the electrolyte of the battery cell 100, the temperature of the electrolyte can be accurately detected, and the temperature inside the battery cell 100 can be confirmed.
The casing 101 of the battery cell 100 according to the present embodiment may have the shape of the casing 101 of a variety of known power batteries, such as a square shape and a circular shape. The cover plate 102 encloses the opening 105 of the case 101 by welding, for example, and a positive post 106 and a negative post 107 are provided on both sides of the cover plate 102 in the longitudinal direction, respectively. The positive post 106 and the negative post 107 are respectively located partially on the outer side of the lid plate 102 (the side exposed to the outside after welding), and partially on the inner side of the lid plate 102 (the side opposite to the inside of the case 101 after welding). The cover plate 102 is also provided with, for example, an explosion-proof valve 110, a liquid inlet 111, and the like. The winding core 103 is formed by winding or laminating a positive electrode sheet 119, a negative electrode sheet 120, and a separator 121 disposed between the positive electrode sheet 119 and the negative electrode sheet 120. Winding core 103 has positive electrode tab 108 and negative electrode tab 109. The positive electrode tab 108 of the winding core 103 is formed by cutting the positive electrode sheet 119, and the negative electrode tab 109 of the winding core 103 is formed by cutting the negative electrode sheet 120. The portion 106a of the positive post 106 located inside the cover plate 102 and the positive tab 108 of the winding core 103 are connected by various known means such as ultrasonic welding, laser welding, resistance heat welding, screwing, riveting, and the like. Similarly, a portion 107a of negative electrode tab 107 located inside lid plate 102 and negative electrode tab 109 of winding core 103 are connected by various known means such as ultrasonic welding, laser welding, resistance thermal welding, screwing, and caulking. In addition, one winding core 103 may be accommodated in the case 101 of the battery cell 100, or a plurality of winding cores 103 may be accommodated therein.
In some embodiments, the temperature measuring device 104 includes a thin film temperature sensor 127, and one end of the thin film temperature sensor 127 extends between the positive electrode tab 119 and the separator 121 or between the negative electrode tab 120 and the separator 121. Specifically, the temperature measuring device 104 includes, for example, a film temperature sensor 127, and the film temperature sensor 127 extends between the positive electrode tab 119 and the separator 121 or between the negative electrode tab 120 and the separator 121 and is immersed in the electrolyte in the battery cell 100. Thus, the thin film temperature sensor 127 can accurately detect the temperature of the electrolyte. Further, since the temperature between the negative electrode tab 120 and the separator 121 is higher than the temperature between the positive electrode tab 119 and the separator 121, it is preferable to extend the thin-film temperature sensor 127 between the negative electrode tab 120 and the separator 121.
Further, since the temperature of the central portion in the longitudinal direction of the winding core 103 is higher than that of other positions, in some embodiments, one end of the thin-film temperature sensor 127 may be extended from the central portion in the longitudinal direction of the winding core 103 between the positive electrode sheet 119 and the separator 121, or between the negative electrode sheet 120 and the separator 121. The middle portion in the longitudinal direction is described here, but the middle portion is not limited to the middle, and refers to, for example, the region between the positive electrode tab 108 and the negative electrode tab 109. Specifically, since the temperature of the middle portion of the winding core 103 is higher in the battery cell 100, the maximum temperature in the battery cell 100 can be detected more accurately by inserting one end of the thin-film temperature sensor 127 from the middle portion of the winding core 103 in the longitudinal direction between the positive electrode sheet 119 and the separator 121 or between the negative electrode sheet 120 and the separator 121.
In addition, the temperature measuring device 104 may also include a plurality of film temperature sensors 127, and, among the plurality of film temperature sensors 127, one end of at least one of the film temperature sensors 127 extends between the positive electrode sheet 119 and the separator 121, and one end of at least one of the film temperature sensors 127 extends between the negative electrode sheet 120 and the separator 121. Specifically, for example, the temperature measuring device 104 may include two film temperature sensors 127, wherein one end of one film temperature sensor 127 extends between the positive electrode sheet 119 and the separator 121, and one end of the other film temperature sensor 127 extends between the negative electrode sheet 120 and the separator 121. By providing a plurality of film temperature sensors 127, the temperatures of the electrolyte at a plurality of positions in the battery cell 100 can be detected, and the operating state of the temperature measuring device 104 can be maintained even when part of the film temperature sensors 127 are broken, so that the reliability of the temperature measuring device 104 can be improved.
In some embodiments, to easily install the temperature measuring device 104, the other end of the thin film temperature sensor 127 of the temperature measuring device 104 may be disposed inside the cover plate 102. Specifically, the film temperature sensor 127 may be disposed inside the cover plate 102 by various connection methods such as snap-fit, glue, welding, screwing, and the like. For example, a holder 128 or the like for holding the film temperature sensor 127 may be provided at the middle portion in the longitudinal direction of the lid plate 102, one end of the film temperature sensor 127 may be attached to the inner side of the lid plate 102 via the holder 128, and the other end of the film temperature sensor 127 may extend from the middle portion in the longitudinal direction of the winding core 103 to between the negative electrode sheet 120 and the separator 121.
Fig. 4 is a schematic diagram of the thin film temperature sensor 127, and in fig. 4, the thin film 131 of the thin film temperature sensor 127 is cut away for convenience of illustration. Referring to fig. 4, in some embodiments, the thin film temperature sensor 127 includes: a substrate 129, a temperature measuring part 130, and a film 131 for sealing the substrate 129 and the temperature measuring part 130. The substrate 129 is, for example, a Circuit board, and the type of the Circuit board of the substrate 129 is not particularly limited, and examples thereof include (Printed Circuit board ), FPC (Flexible Printed Circuit, Flexible Printed Circuit board), and the like. The temperature measuring unit 130 is provided on the substrate 129. The film 131 encapsulates the substrate 129 and the temperature measuring part 130.
In some embodiments, the substrate 129 has circuits printed thereon for easy electrical connection with the thermometric section 130, and the thermometric section 130 is connected to these circuits. Specifically, taking an FPC board as an example, a circuit for converting, amplifying, reducing noise, and the like of a signal detected by the temperature measuring unit 130 is printed on the FPC board, and the temperature measuring unit 130 is provided on the FPC board and electrically connected to the circuit printed on the FPC board.
In some embodiments, a layer of thermally sensitive material disposed on the substrate 129, for example, may be included as the thermometry section 130. Examples of the thermosensitive material include manganese-copper alloy, nickel-copper alloy, modified nickel-chromium resistance alloy, precious metal precision resistance alloy, and ceramic electrothermal material. These heat sensitive materials may be disposed on the substrate 129 by various means such as coating, plating, etc., and electrically connected to the basic circuit.
In addition, in some embodiments, at least one temperature measuring member 112 disposed on the substrate 129, for example, may be further included as the temperature measuring part 130. The temperature measuring member 112 may be at least one selected from a thermocouple and a thermistor. Specifically, for example, a thermocouple or a thermistor may be provided on the substrate 129 by means of dispensing or soldering. By providing the temperature measuring material 112 on the substrate 129, the temperature measuring material 112 can be easily and reliably attached.
In some embodiments, in order to reliably protect the substrate 129 and the temperature measuring part 130 and prevent the substrate 129 and the temperature measuring part 130 from being corroded by the electrolyte in the battery cell 100, the material of the film 131 may be a corrosion-resistant material, for example, the material of the film 131 may be selected from: one of polyimide, PET plastic, polyetheretherketone, aramid or aromatic polyamide, epoxy resin and silicone rubber. For example, the substrate 129 and the temperature measuring member 112 disposed on the substrate 129 may be encapsulated by, for example, two films 131 in a high-temperature hot-pressing manner, so that the temperature measuring device 104 is sealed with respect to the electrolyte in the battery cell 100.
Fig. 5 is a schematic diagram of a battery system 200, and referring to fig. 5, the battery cells 100 of the above embodiments may be used in the battery system 200. The battery system 200 according to the second embodiment includes a power supply battery 201 and a battery management system 202(BMS), the power supply battery 201 is formed by electrically connecting a plurality of battery cells 100 of the above-described respective embodiments, and the battery management system 202 is respectively connected in communication with the temperature measuring devices 104 of the respective battery cells 100. The connection of the power supply battery 201 can be made with reference to the connection of the existing battery system 200, and will not be described in detail here. The battery management system 202 and the temperature measuring device 104 of each battery cell 100 may be communicatively connected in a wired or wireless manner, for example.
In the present embodiment, it is possible to realize that the battery management system 202 effectively monitors the temperature inside each of the battery cells 100 in the power supply battery 201. Specifically, by disposing the temperature measuring device 104 inside the battery cell 100, the battery management system 202 can monitor and control each battery cell 100 in real time, and the safety of the battery system 200 can be improved. In addition, since the temperature data detected inside the battery cell 100 has higher accuracy, the state of the battery cell 100 can be determined more accurately. Thereby improving management efficiency and safety of the battery system 200.
Fig. 6 is a schematic diagram of an electric vehicle 300, and referring to fig. 6, the battery system 200 of the above embodiment may be used in the electric vehicle 300. Examples of the electric vehicle 300 include a hybrid vehicle and a pure electric vehicle. The electric vehicle according to the present embodiment can improve the management efficiency and safety of the battery system 200 by using the battery system 200 described above.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 utility model. 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.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. An electrical core, comprising:
a housing having an opening;
the cover plate is arranged at one end of the opening and used for packaging the opening;
the winding core is accommodated in the shell and is provided with a positive plate, a negative plate and a diaphragm for separating the positive plate from the negative plate;
and the temperature measuring device is arranged in the shell, and one end of the temperature measuring device extends into the space between the positive plate and the diaphragm and/or extends into the space between the negative plate and the diaphragm.
2. The battery cell of claim 1, wherein the temperature measuring device comprises a thin film temperature sensor, and one end of the thin film temperature sensor extends between the positive electrode plate and the diaphragm or between the negative electrode plate and the diaphragm.
3. The battery core of claim 2, wherein one end of the thin film temperature sensor extends from the middle of the winding core in the length direction to between the positive electrode plate and the diaphragm or between the negative electrode plate and the diaphragm.
4. The battery cell of claim 1, wherein the temperature measuring device comprises a plurality of thin film temperature sensors, and wherein one end of at least one of the thin film temperature sensors extends between the positive plate and the separator, and one end of at least one of the thin film temperature sensors extends between the negative plate and the separator.
5. The electrical core of any of claims 2 to 4, wherein the other end of the thin-film temperature sensor is disposed inside the cover plate.
6. The electrical core of any of claims 2 to 4, wherein the thin film temperature sensor comprises:
a substrate;
a temperature measuring part disposed on the substrate;
and the film encapsulates the substrate and the temperature measuring part.
7. The battery cell of claim 6, wherein the temperature measurement portion comprises a layer of thermally sensitive material disposed on the substrate.
8. The battery cell of claim 6, wherein the thermometric section comprises at least one thermometric element disposed on the substrate.
9. The electrical core of claim 8, wherein the temperature measurement member is selected from at least one of a thermocouple and a thermistor.
10. The battery cell of any of claims 7 to 9, wherein the substrate has a circuit printed thereon, and the temperature measurement portion is connected to the circuit.
11. The cell of claim 6, wherein the film is selected from the group consisting of: one of polyimide, PET plastic, polyetheretherketone, aramid or aromatic polyamide, epoxy resin and silicone rubber.
12. The battery system comprises a power supply battery and a battery management system, wherein the power supply battery is composed of a plurality of battery cores of any one of claims 1 to 11 which are electrically connected, and the battery management system is respectively in communication connection with the temperature measuring devices of the battery cores.
13. An electric vehicle comprising the battery system of claim 12.
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