Top cover assembly, battery cell, battery and electrical device

Abstract

The present application provides a top cover assembly, a battery cell, a battery and an electrical device, relating to the technical field of batteries. Among them, the top cover assembly includes a top cover sheet, a positive pole column assembly and a negative pole column assembly arranged at both ends of the top cover sheet, and the negative pole column assembly is insulated and connected to the top cover sheet; a battery cell monitoring module is installed on the top cover sheet and at least partially exposed outside the top cover sheet, and is electrically connected to the positive pole column assembly and the negative pole column assembly for monitoring and managing the battery cell body. The technical solution of the present application can solve the technical problem that the battery management system in the prior art cannot accurately and effectively monitor and manage the state of each battery cell.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a top cover assembly, a battery cell, a battery, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] Existing new energy vehicles usually form a battery module through multiple single-cell battery cores, and form a battery by multiple battery modules to supply power for operation. Although the battery management system in the current battery system monitors the information of the battery cells, it can only monitor some of the battery cells in the battery module, does not monitor the state of each battery core, cannot accurately and effectively monitor the battery state, and cannot monitor the state of the battery cells in real time. Summary of the Invention

[0004] In view of the above problems, the present application provides a top cover assembly, a battery cell, a battery, and an electrical device, which can solve the technical problem that the battery management system in the prior art cannot monitor and manage the state of each battery cell in real time and effectively.

[0005] In a first aspect, the present application provides a top cover assembly, including: a top cover sheet, a positive pole column assembly and a negative pole column assembly arranged at both ends of the top cover sheet, and the negative pole column assembly is insulated from the top cover sheet; a battery core monitoring module, installed and exposed outside the top cover sheet, and electrically connected to the positive pole column assembly and the negative pole column assembly, for monitoring and managing the battery core body.

[0006] In the technical solution of the embodiment of the present application, the battery core monitoring module is integrated on the top cover assembly of each battery cell, and the battery core monitoring module can be directly powered by the battery core body, so that the battery core monitoring module can monitor and manage the state of each battery cell in real time and reliably. Moreover, at least part of the battery core monitoring module is exposed outside the top cover sheet after installation, which is convenient for repairing and maintaining the battery core monitoring module during use, and can achieve higher battery safety management.

[0007] In some embodiments, the battery core monitoring module is installed on the top side of the top cover sheet, and at least part of it is located in the positive pole column assembly or the negative pole column assembly to achieve conduction with the positive pole of the positive pole column assembly or the negative pole of the negative pole column assembly, and is electrically connected to the negative pole or the positive pole through a wire harness. By integrating the battery core monitoring module into the positive pole column assembly or the negative pole column assembly, the flexible application of the battery core monitoring module can be realized without changing the original structure of the top cover assembly, with strong applicability, and the volume of the battery core monitoring module can be reduced, the installation method is simple, and the use is flexible.

[0008] In some embodiments, the battery cell monitoring module is at least partially located in the positive terminal assembly; the positive terminal assembly includes a positive riveting block located on the top side for fixing and conducting with the positive terminal. The battery cell monitoring module is installed on the bottom side of the positive riveting block and has a conductive part that conducts with the positive riveting block. By integrating the battery cell monitoring module into the positive terminal assembly, the battery cell monitoring module can be fixed by the positive riveting block, and at the same time, the conduction between the battery cell monitoring module and the positive terminal can be indirectly achieved through the contact between the conductive part of the battery cell monitoring module and the positive riveting block.

[0009] In some embodiments, the battery cell monitoring module is at least partially located in the negative terminal assembly; the negative terminal assembly includes a negative riveting block located on the top side for fixing and conducting with the negative terminal. The battery cell monitoring module is installed on the bottom side of the negative riveting block and has a conductive part that conducts with the negative riveting block. By integrating the battery cell monitoring module into the negative terminal assembly, the battery cell monitoring module can be fixed by the negative riveting block, and at the same time, the conduction between the battery cell monitoring module and the negative terminal can be indirectly achieved through the contact between the conductive part of the battery cell monitoring module and the negative riveting block.

[0010] In some embodiments, an installation groove is provided on the top side surface of the top cover plate. The battery cell monitoring module is installed in the installation groove, and the battery cell monitoring module is electrically connected to the positive terminal and the negative terminal through a wire harness. Installing the battery cell monitoring module in the installation groove of the top cover plate can be flexibly applied with strong applicability, and can simplify the installation and disassembly of the battery cell monitoring module, facilitating inspection and maintenance.

[0011] In some embodiments, the installation groove is located between the installation positions of the positive terminal assembly and the pressure relief device on the top cover plate, or the installation groove is located between the installation positions of the negative terminal assembly and the pressure relief device on the top cover plate. Such a design can avoid the interference and influence of the installation of the battery cell monitoring module on the top cover plate on the pressure relief device on the top cover plate.

[0012] In some embodiments, the battery cell monitoring module is installed on the top side of the top cover plate, and the two end parts of the battery cell monitoring module are respectively located in the positive terminal assembly and the negative terminal assembly to achieve conduction with the positive terminal of the positive terminal assembly and the negative terminal of the negative terminal assembly. In such a design, the battery cell monitoring module straddles the positive terminal assembly and the negative terminal assembly on the top cover plate, which can increase the volume of the battery cell monitoring module, provide the possibility of integrating more functions, and does not require additional lead wires.

[0013] In some embodiments, the battery cell monitoring module is located on the top side of the pressure relief device on the top cover plate and is spaced apart from the pressure relief device by a preset distance. Such a design can avoid the influence of the installation position of the battery cell monitoring module on the function of the pressure relief device.

[0014] In some embodiments, an avoidance hole corresponding to and adapted to the pressure relief device on the top cover sheet is provided on the battery cell monitoring module. The installation position of the pressure relief device can be avoided through the avoidance hole, so as to prevent the installation position of the battery cell monitoring module from affecting the function of the pressure relief device.

[0015] In some embodiments, the positive terminal assembly includes a positive riveting block located on the top side for fixing and conducting with the positive terminal. The negative terminal assembly includes a negative riveting block located on the top side for fixing and conducting with the negative terminal. Two ends of the battery cell monitoring module are respectively installed on the bottom sides of the positive riveting block and the negative riveting block, and each has a conductive part that conducts with the positive riveting block and the negative riveting block. By integrating the two ends of the battery cell monitoring module into the positive terminal assembly and the negative terminal assembly, the two ends of the battery cell monitoring module can be fixed through the positive riveting block and the negative riveting block. At the same time, the battery cell monitoring module can be indirectly conducted with the positive terminal and the negative terminal through the contact between the conductive parts of the battery cell monitoring module and the positive riveting block and the negative riveting block.

[0016] In some embodiments, the battery cell monitoring module has an insulating part that abuts against the top cover sheet and is located between the negative mounting hole for passing through the negative terminal and the negative terminal, so that the negative terminal is insulated and connected to the top cover sheet. In this way, the structure for insulating the negative terminal from the top cover sheet in the negative terminal assembly can be replaced by the battery cell monitoring component, so as to simplify the structure of the negative terminal assembly.

[0017] In some embodiments, the battery cell monitoring module at least includes: an information acquisition unit, a communication unit, a balancing unit, and a processing unit. The information acquisition unit, the communication unit, and the balancing unit are respectively electrically connected to the processing unit. Such a design can monitor and manage the battery cell body more comprehensively and directly.

[0018] In some embodiments, the battery cell monitoring module further includes: a power supply unit and a storage unit. The power supply unit is respectively electrically connected to the other units of the battery cell monitoring module, and the storage unit is electrically connected to the processing unit. The power supply module can ensure a stable input power supply for other units, and the setting of the storage unit is beneficial to the cascade utilization and traceability of the battery cell body.

[0019] In a second aspect, the present application provides a battery cell, which includes a housing, a battery cell body accommodated inside the housing, and the top cover assembly described in any of the above solutions.

[0020] In some embodiments, the information acquisition unit of the battery cell monitoring module at least includes: a temperature sensor, and the temperature sensor is arranged inside the battery cell body. Integrating the temperature sensor inside the battery cell can more accurately monitor the temperature of the battery cell body.

[0021] In some embodiments, the information acquisition unit of the battery cell monitoring module at least includes: a pressure sensor, which is arranged inside the battery cell body. Integrating the pressure sensor inside the battery cell can more accurately monitor the pressure of the battery cell body.

[0022] In a third aspect, the present application provides a battery, which includes a battery management module; a plurality of battery cells as described in any of the above solutions, and the communication unit of the battery cell monitoring module of the battery cell is electrically connected to the battery management module.

[0023] In a fourth aspect, the present application provides an electrical device, which includes the battery as described in any of the above solutions.

[0024] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically exemplified below. Description of the Drawings

[0025] By referring to the accompanying drawings and reading the following detailed description, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, where:

[0026] Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0027] Figure 2 is a schematic structural diagram of a battery according to some embodiments of the present application;

[0028] Figure 3 is an exploded structural diagram of a battery cell according to some embodiments of the present application;

[0029] Figure 4 is an exploded structural diagram of a top cover assembly according to some embodiments of the present application;

[0030] Figure 5 is a schematic structural diagram of a top cover assembly according to some embodiments of the present application;

[0031] Figure 6 is another schematic structural diagram of a top cover assembly according to some embodiments of the present application;

[0032] Figure 7 is another schematic structural diagram of a top cover assembly according to some embodiments of the present application;

[0033] Figure 8 is a schematic composition diagram of the battery cell monitoring module of the top cover assembly according to some embodiments of the present application;

[0034] Figure 9 Another schematic diagram of the battery cell monitoring module of the top cover assembly according to some embodiments of the present application;

[0035] Figure 10 Schematic diagram of the structure of a battery cell according to some embodiments of the present application.

[0036] Description of the reference numerals in the drawings:

[0037] Vehicle 1000;

[0038] Battery 100;

[0039] Battery cell 10, housing 11, battery cell body 12, top cover assembly 13;

[0040] Top cover sheet 131, positive electrode column assembly 132, negative electrode column assembly 133, pressure relief device 134, battery cell monitoring module 135;

[0041] Positive electrode column 1321, positive electrode lower plastic plate 1322, positive electrode conductive block 1323, positive electrode riveting block 1324;

[0042] Negative electrode column 1331, negative electrode lower plastic plate 1332, negative electrode upper plastic plate 1333, negative electrode riveting block 1334;

[0043] Information acquisition unit 1351, communication unit 1352, balancing unit 1353, processing unit 1354, power supply unit 1355, storage unit 1356. Detailed implementation manners

[0044] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0047] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0048] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0049] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0050] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0051] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0052] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, electric vehicles, as well as in many fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing.

[0053] The inventor noticed that although the battery management system in the battery 100 system monitors the information of the battery cells 10, it can only monitor some of the battery cells 10 in the battery 100 system, and does not monitor the state of each battery cell. It is impossible to accurately and effectively monitor the state of the battery 100. Moreover, the battery management system uses the vehicle lead-acid power supply. When the vehicle is not running, the battery management system is in a dormant state and cannot monitor the state of the battery 100 in real time.

[0054] In order to solve the problem that the battery management system cannot accurately and effectively monitor and manage the state of each battery cell 10, the applicant's research found that a battery cell monitoring system can be set corresponding to each battery cell 10, and the battery cell monitoring system is integrated into the battery cell 10 and powered by the battery cell body 12 of the battery cell 10. Specifically, the battery cell monitoring module 135 can be integrated into the top cover assembly 13 of the battery cell 10, which is installed on the top cover piece 131 and electrically connected to the positive pole column assembly 132 and the negative pole column assembly 133 to realize power taking, so that the battery cell monitoring module 135 can monitor and manage the state of each battery cell 10 in real time and reliably.

[0055] The power consumption device disclosed in the embodiment of the present application can be, but is not limited to, power consumption devices such as vehicles 1000, ships or aircrafts. The battery 100 system disclosed in the present application can be used to form the power supply system of the power consumption device, and higher battery 100 safety management can be realized.

[0056] For the convenience of description, the following embodiments will take a vehicle 1000 as an example of a power consumption device in an embodiment of the present application for description.

[0057] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1000 provided by some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery 100 system is disposed inside vehicle 1000, and the battery 100 system can be disposed at the bottom, the head, or the tail of vehicle 1000. The battery 100 system can be used for power supply of vehicle 1000. For example, battery 100 can be used as the operating power source of the vehicle, or battery 100 can also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0058] Please refer to Figure 2 , Figure 2 Structural diagram of battery 100 provided by some embodiments of the present application. A battery cell 10 refers to the smallest unit that makes up battery 100. Battery 100 includes a plurality of battery cells 10, which can be multiple. The multiple battery cells 20 can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 10 can be directly connected in series, in parallel, or in a series-parallel combination, and then the whole formed by the multiple battery cells 20 is accommodated in a box body; or battery 100 can also be that multiple battery cells 20 are first connected in series, in parallel, or in a series-parallel combination to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a series-parallel combination to form a whole and are accommodated in a box body.

[0059] Please refer to Figure 3 , Figure 3 Exploded structural schematic diagram of battery cell 10 provided by some embodiments of the present application. Battery cell 10 includes a housing 11, a core body 12, and a top cover assembly 13. The internal environment formed by housing 11 can be used to accommodate core body 12, electrolyte, and other components. The core component is the component in battery cell 10 where electrochemical reactions occur. The top cover assembly 13 covers the opening of housing 11 to isolate the internal environment of battery cell 10 from the external environment.

[0060] Core body 12 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet having active materials constitute the main body of the core component. The parts of the positive electrode sheet and the negative electrode sheet without active materials respectively constitute electrode tabs. The positive electrode tab and the negative electrode tab can be commonly located at one end of the main body. During the charging and discharging process of battery 100, the positive active material and the negative active material react with the electrolyte, and the positive electrode tab and the negative electrode tab are respectively connected to the positive electrode post 1321 and the negative electrode post 1331 to form a current loop.

[0061] Please refer to Figure 4 , Figure 4Exploded structural schematic diagram of the top cover assembly 13 provided by some embodiments of the present application. The top cover assembly 13 mainly consists of structures such as a top cover sheet 131, a positive electrode post assembly 132, a negative electrode post assembly 133, and a pressure relief device 134, etc. The top cover sheet 131 can be a light aluminum sheet and can be formed by stamping. The top cover sheet 131 is provided with a positive electrode post mounting hole, a negative electrode post mounting hole, and a pressure relief device mounting hole located between the positive electrode post mounting hole and the negative electrode post mounting hole. The positive electrode post mounting hole, the negative electrode post mounting hole, and the pressure relief device mounting hole can be formed by machining, and the structures of the positive electrode mounting hole and the negative electrode mounting hole can be the same; in addition, the top cover sheet 131 is also provided with a liquid injection hole for injecting electrolyte.The positive terminal assembly 132 may include structures such as a positive terminal 1321, a lower positive plastic plate 1322, a positive conductive block 1323 (or an upper positive plastic plate), and a positive riveting block 1324. The negative terminal assembly 133 may include a negative terminal 1331, a lower negative plastic plate 1332, an upper negative plastic plate 1333, and a negative riveting block 1334. The lower positive plastic plate 1322 and the lower negative plastic plate 1332 are attached to the lower surface of the top cover sheet 131 and respectively have through holes corresponding to the positive terminal mounting holes and the negative terminal mounting holes. The lower positive plastic plate 1322 and / or the lower negative plastic plate 1332 may also have a pressure relief channel corresponding to the pressure relief device mounting hole. The lower positive plastic plate 1322 and the lower negative plastic plate 1332 are used to be embedded in the housing 11 to achieve insulation between the top cover sheet 131 and the battery cell body 12. By using the positive conductive block 1323, the positive terminal assembly 132 can keep a weak electrical connection relationship between the positive terminal 1321 and the top cover sheet 131 to reduce the corrosion of the housing 11, or the positive terminal assembly 132 may also use an upper positive plastic plate to insulate and connect the positive terminal 1321 and the top cover sheet 131. The positive conductive block 1323 and the upper negative plastic plate 1333 are installed on the upper surface of the top cover sheet 131 and respectively have through holes corresponding to the positive terminal mounting hole and the negative terminal mounting hole for the positive terminal 1321 and the negative terminal 1331 to pass through, and are respectively partially embedded in the positive terminal mounting hole and the negative terminal mounting hole. The upper negative plastic plate 1333 is used to achieve an insulated connection between the negative terminal 1331 and the top cover sheet 131. The positive terminal 1321 and the negative terminal 1331 have the same structure and are sleeved with sealing rings. The positive terminal 1321 sequentially passes through the through hole of the lower positive plastic plate 1322, the positive mounting hole of the top cover sheet 131, and the through hole of the positive conductive block 1323 and is assembled by riveting. The negative terminal 1331 sequentially passes through the through hole of the lower negative plastic plate 1332, the negative mounting hole of the top cover sheet 131, and the through hole of the upper negative plastic plate 1333 and is assembled by riveting. The upper ends of the positive terminal 1321 and the negative terminal 1331 are higher than the top cover sheet 131 by a preset height. The positive terminal 1321 and the negative terminal 1331 have the same structure and are usually made of a good metal conductor. The positive riveting block 1324 and the negative riveting block 1334 respectively have through holes through which the positive terminal 1321 and the negative terminal 1331 can pass, can be respectively conducted with the positive terminal 1321 and the negative terminal 1331, and are respectively riveted to the upper ends of the positive terminal 1321 and the negative terminal 1331. The pressure relief device 134 is installed in the pressure relief device mounting hole of the top cover sheet 131, can be made of aluminum alloy, and can be fixed on the top cover sheet 131 by laser welding. The pressure relief device 134 can specifically be an explosion-proof sheet / valve structure. The pressure relief device 134 will rupture when the pressure in the battery cell body 12 is greater than the threshold value to avoid explosion of the battery cell body 12. The shape of the pressure relief device mounting hole is designed according to the shape of the pressure relief device 134. To protect the pressure relief device 134, a protective film can also be attached to the upper end of the pressure relief device mounting hole, and the protective film can be a PET patch.

[0062] According to some embodiments of the present application, with reference to Figures 5 to 7 , the present application provides a top cover assembly 13 for sealing a housing 11 that houses a battery cell body 12. The top cover assembly 13 includes a top cover sheet 131, a positive terminal assembly 132 and a negative terminal assembly 133 disposed at both ends of the top cover sheet 131, and the negative terminal assembly 133 is insulated from the top cover sheet 131; and a battery cell monitoring module 135, which is installed and exposed outside the top cover sheet 131 and is electrically connected to the positive terminal assembly 132 and the negative terminal assembly 133 for monitoring and managing the battery cell body 12.

[0063] The top cover assembly mainly includes a top cover sheet 131, a positive terminal assembly 132 and a negative terminal assembly 133 installed at both ends of the top cover sheet 131, and a pressure relief device 134 located between the positive terminal assembly 132 and the negative terminal assembly 133. The positive terminal 1321 of the positive terminal assembly 132 can maintain a weak electrical connection with the top cover sheet 131 through a large resistor to reduce the corrosion of the outer shell of the battery cell 10, or the positive terminal 1321 of the positive terminal assembly 132 can also be insulated from the top cover sheet 131, and the negative terminal 1331 of the negative terminal assembly 133 is insulated from the top cover sheet 131.

[0064] The battery cell monitoring module 135 may but is not limited to include an information acquisition unit 1351 for monitoring the state of the battery cell body 12, a communication unit 1352 for communicating with the outside, a balancing unit 1353, a processing unit 1354, etc., for detecting and managing the battery cell body 12 of the battery cell 10; installing the battery cell monitoring module 135 on the top cover sheet 131 and at least partially exposing it outside the top cover sheet 131 means installing the main part of the battery cell monitoring module 135, that is, at least the circuit board is installed on the top cover sheet 131, and each functional unit on the battery cell monitoring module 135 can be integrated on this circuit board, or can also be arranged at other positions of the battery cell 10; the battery cell monitoring module 135 is electrically connected to the positive terminal assembly 132 and the negative terminal assembly 133 respectively to supply power to the battery cell monitoring module 135 through the battery cell body 12, so as to realize real-time monitoring of the battery cell body 12.

[0065] By integrating the battery cell monitoring module 135 on the top cover assembly of each battery cell 10 and directly supplying power to the battery cell monitoring module 135 through the battery cell body 12, the battery cell monitoring module 135 can monitor and manage the state of each battery cell 10 in real time and reliably, and at least part of the battery cell monitoring module 135 is exposed outside the top cover sheet 131 after installation, which is convenient for repairing and maintaining the battery cell monitoring module 135 during use, and can achieve higher battery 100 safety management.

[0066] According to some embodiments of the present application, optionally, please continue to refer to Figure 5, the battery cell monitoring module 135 is installed on the top side of the top cover plate 131 and at least partially located in the positive terminal assembly 132 or the negative terminal assembly 133 to achieve conduction with the positive terminal of the positive terminal assembly 132 or the negative terminal 1331 of the negative terminal assembly 133, and is electrically connected to the negative terminal 1331 or the positive terminal 1321 through a wire harness.

[0067] The battery cell monitoring module 135 can be integrated at one end of the top side of the top cover plate 131, and the installation position corresponds to the positive terminal assembly 132 or the negative terminal assembly 133 on the top cover plate 131; specifically, the battery cell monitoring module 135 can be at least partially installed in the positive terminal assembly 132, so as to conveniently achieve conduction with the positive terminal 1321 of the positive terminal assembly 132, and only need to connect the negative terminal 1331 of the negative terminal assembly 133 through a wire harness; or, the battery cell monitoring module 135 can also be at least partially installed in the negative terminal assembly 133, so as to conveniently achieve conduction with the negative terminal 1331 of the negative terminal assembly 133, and only need to connect the positive terminal 1321 of the positive terminal assembly 132 through a wire harness; the installation method is flexible, without changing the battery cell structure, and the wire harness connection on one side can be cancelled.

[0068] Installing the battery cell monitoring module 135 at least partially in the positive terminal assembly 132 or the negative terminal assembly 133 means that the main body part of the battery cell monitoring module 135 can be installed between adjacent structures of the positive terminal assembly 132 or the negative terminal assembly 133; through holes corresponding to the terminal posts can be provided on the battery cell monitoring module 135 for the corresponding terminal posts to pass through.

[0069] By arranging the battery cell monitoring module 135 at one end of the top side of the top cover plate 131, that is, installing the battery cell monitoring module 135 at the position corresponding to the positive terminal assembly 132 or the negative terminal assembly 133 on the top cover plate 131, the electrical connection between the battery cell monitoring module 135 and the positive terminal 1321 and the negative terminal 1331 can be conveniently achieved, and this solution can realize the miniaturized design of the battery cell monitoring module 135 without changing the original structure of the battery cell 10, and can be applied to different battery cells 10, with flexible use.

[0070] According to some embodiments of the present application, optionally, the battery cell monitoring module 135 is at least partially located in the positive terminal assembly 132; the positive riveting block 1324 located on the top side of the positive terminal assembly 132 for fixing and conducting with the positive terminal 1321, the battery cell monitoring module 135 is installed on the bottom side of the positive riveting block 1324 and has a conductive part that conducts with the positive riveting block 1324.

[0071] Specifically, the installation position of the battery cell monitoring module 135 on the top side of the top cover plate 131 can correspond to the positive electrode column assembly 132, and at least part of it is located in the positive electrode column assembly 132. Specifically, through holes corresponding to the positive electrode column 1321 can be provided on the battery cell monitoring module 135, enabling the positive electrode column 1321 to pass through these through holes, and the battery cell monitoring module 135 can be installed between the positive electrode conductive block 1323 or the upper plastic plate of the positive electrode and the positive electrode riveting block 1324. The positive electrode riveting block 1324 is used to rivet and fix the positive electrode column assembly 132 and is electrically connected to the positive electrode column 1321. By providing a conductive part on the battery cell monitoring module 135, surface contact can be achieved with the positive electrode riveting block 1324 for electrical connection, thereby indirectly realizing the electrical connection between the battery cell monitoring module 135 and the positive electrode column 1321, and the positive electrode riveting block 1324 can rivet and fix the battery cell monitoring module 135.

[0072] By integrating the battery cell monitoring module 135 into the positive electrode column assembly 132, the electrical connection between the battery cell monitoring module 135 and the positive electrode column 1321 can be indirectly realized through the positive electrode riveting block 1324, and the battery cell monitoring module 135 can be riveted and fixed through the positive electrode riveting block 1324.

[0073] According to some embodiments of the present application, optionally, please refer to Figure 5 , as shown in the figure, at least part of the battery cell monitoring module 135 is located in the negative electrode column assembly 133; the negative electrode column assembly 133 includes a negative electrode riveting block 1334 located on the top side for fixing and electrically connecting to the negative electrode column 1331. The battery cell monitoring module 135 is installed on the bottom side of the negative electrode riveting block 1334 and has a conductive part electrically connected to the negative electrode riveting block 1334.

[0074] Specifically, the installation position of the battery cell monitoring module 135 on the top side of the top cover plate 131 can correspond to the negative electrode column assembly 133, and at least part of it is located in the negative electrode column assembly 133. Specifically, through holes corresponding to the negative electrode column 1331 can be provided on the battery cell monitoring module 135, enabling the negative electrode column 1331 to pass through these through holes, and the battery cell monitoring module 135 can be installed between the upper plastic plate 1333 of the negative electrode and the negative electrode riveting block 1334. The negative electrode riveting block 1334 is used to rivet and fix the negative electrode column assembly 133 and is electrically connected to the negative electrode column 1331. By providing a conductive part on the battery cell monitoring module 135, surface contact can be achieved with the negative electrode riveting block 1334 for electrical connection, thereby indirectly realizing the electrical connection between the battery cell monitoring module 135 and the negative electrode column 1331, and the negative electrode riveting block 1334 can rivet and fix the battery cell monitoring module 135.

[0075] By integrating the battery cell monitoring module 135 into the negative electrode column assembly 133, the electrical connection between the battery cell monitoring module 135 and the negative electrode column 1331 can be indirectly realized through the negative electrode riveting block 1334, and the battery cell monitoring module 135 can be riveted and fixed through the negative electrode riveting block 1334.

[0076] According to some embodiments of the present application, optionally, refer to Figure 6 , an installation groove is provided on the top side surface of the top cover sheet 131, the battery cell monitoring module 135 is installed in the installation groove, and the battery cell monitoring module 135 is electrically connected to the positive electrode column 1321 and the negative electrode column 1331 through a wire harness.

[0077] The battery cell monitoring module 135 can also be arranged on the top side of the top cover sheet 131 and at a position between the positive electrode column assembly 132 and the negative electrode column assembly 133. Specifically, an installation groove can be provided on the surface of the top cover sheet 131, and the size of the installation groove is adapted to the size of the battery cell monitoring module 135. The battery cell monitoring module 135 can be fully accommodated in the installation groove, or can also be partially accommodated in the accommodation groove, that is, part of it protrudes outward from the installation groove after installation; the battery cell monitoring module 135 and the installation groove can be connected by a snap structure, but are not limited to this; the battery cell monitoring module 135 can be connected to the positive electrode column 1321 and the negative electrode column 1331 respectively through two wire harnesses to achieve conduction with the positive electrode column 1321 and the negative electrode column 1331. In the present solution or any of the above solutions where the battery cell monitoring module 135 needs to be electrically connected to the positive electrode column 1321 or the negative electrode column 1331 through a wire harness, a plug-in part can be provided on the battery cell monitoring module 135 to enable the wire harness and the plug-in part on the battery cell monitoring module 135 to be pluggable and detachable, which is convenient for maintenance.

[0078] Installing the battery cell monitoring module 135 in the installation groove of the top cover sheet 131 can be flexibly applied, has strong applicability, and can simplify the installation and disassembly of the battery cell monitoring module 135, which is convenient for inspection and maintenance.

[0079] According to some embodiments of the present application, optionally, the installation groove is located between the installation positions of the positive electrode column assembly 132 and the pressure relief device 134 on the top cover sheet 131, or the installation groove is located between the installation positions of the negative electrode column assembly 133 and the pressure relief device 134 on the top cover sheet 131.

[0080] Both ends of the top cover sheet 131 are provided with a positive electrode column installation hole and a negative electrode column installation hole corresponding to the positive electrode column 1321 and the negative electrode column 1331 for the positive electrode column 1321 and the negative electrode column 1331 to pass through, and a pressure relief device installation hole is also provided between the positive electrode column installation hole and the negative electrode column installation hole for installing the pressure relief device 134; to avoid interference between the setting of the installation groove and the pressure relief device installation hole, refer to Figure 6 , the installation groove can be arranged on the top cover sheet 131 and between the positive electrode column installation hole and the pressure relief device installation hole, or the installation groove can also be arranged on the top cover sheet 131 and between the negative electrode column installation hole and the pressure relief device installation hole.

[0081] Such a design can avoid the influence of the installation position of the battery cell monitoring module 135 on the function of the pressure relief device 134.

[0082] According to some embodiments of the present application, optionally, please refer to Figure 7 , the battery cell monitoring module 135 is installed on the top side of the top cover plate 131, and two end portions of the battery cell monitoring module 135 are respectively located in the positive electrode column assembly 132 and the negative electrode column assembly 133 to achieve conduction with the positive electrode column 1321 of the positive electrode column assembly 132 and the negative electrode column 1331 of the negative electrode column assembly 133.

[0083] The battery cell monitoring module 135 can also be arranged on the top side of the top cover plate 131 and span across the two poles of the battery cell 10, that is, two end portions of the battery cell monitoring module 135 respectively correspond to the installation positions of the positive electrode column assembly 132 and the negative electrode column assembly 133, and the two end portions are respectively located in the positive electrode column assembly 132 and the negative electrode column assembly 133, so as to conveniently achieve conduction with the positive electrode column of the positive electrode column assembly 132 and the negative electrode column 1331 of the negative electrode column assembly 133. There is no need for additional connection wire harnesses to achieve conduction with the positive electrode column 1321 and the negative electrode column 1331, which can simplify the structure and increase the volume of the battery cell monitoring module 135 to integrate more functions.

[0084] Installing two end portions of the battery cell monitoring module 135 in the positive electrode column assembly 132 and the negative electrode column assembly 133 respectively means that the two end portions of the battery cell monitoring module 135 can be installed between adjacent structures of the positive electrode column assembly 132 and the negative electrode column assembly 133; two through holes respectively corresponding to the positive electrode column 1321 and the negative electrode column 1331 can be provided on the battery cell monitoring module 135 for the positive electrode column 1321 and the negative electrode column 1331 to pass through.

[0085] In such a design, the battery cell monitoring module 135 can be connected across the positive electrode column assembly 132 and the negative electrode column assembly 133, which can increase the volume of the battery cell monitoring module 135 to provide the possibility of integrating more functions and does not require additional leads.

[0086] According to some embodiments of the present application, optionally, the battery cell monitoring module 135 is located on the top side of the pressure relief device 134 on the top cover plate 131 and is spaced apart from the pressure relief device 134 by a preset distance.

[0087] When adopting the solution that the battery cell monitoring module 135 is integrated on the top side of the top cover plate 131 and spans across the two poles of the battery cell 10, in the thickness direction of the top cover plate 131, the battery cell monitoring module 135 has an overlapping area with the pressure relief device 134. To avoid affecting the function of the pressure relief device 134, the battery cell monitoring module 135 can be spaced apart from the pressure relief device 134 and the upper protective film by a preset distance to avoid interference and influence between the two.

[0088] Such a design can avoid the influence of the installation position of the battery cell monitoring module 135 on the function of the pressure relief device 134, and improve the safety of the battery cell unit.

[0089] According to some embodiments of the present application, optionally, an avoidance hole corresponding to and adapted to the pressure relief device 134 on the top cover sheet 131 is provided on the battery cell monitoring module 135.

[0090] When adopting the scheme that the battery cell monitoring module 135 is integrated on the top side of the top cover sheet 131 and straddles the two poles of the battery cell unit 10, in the thickness direction of the top cover sheet 131, the battery cell monitoring module 135 has an overlapping area with the pressure relief device 134. To avoid the influence on the function of the pressure relief device 134, the battery cell monitoring module 135 can adopt a special-shaped circuit board, such as a flexible PCB board, and an avoidance hole corresponding to and adapted to the pressure relief device 134 is opened on the battery cell monitoring module 135. Here, the adaptation means that the shape and size of the avoidance hole are the same as those of the pressure relief device 134, or can also be slightly larger than the size of the pressure relief device 134; when the battery cell monitoring module 135 straddles the two poles of the battery cell unit 10, the position of the avoidance hole just corresponds to the position of the pressure relief device 134 on the top cover sheet 131, which can avoid the interference between the battery cell monitoring module 135 and the pressure relief device 134.

[0091] Such a design can enable the battery cell monitoring module 135 to effectively avoid the pressure relief device 134 on the top cover sheet 131, avoid the influence on the function of the pressure relief device 134, and improve the safety of the battery cell unit.

[0092] According to some embodiments of the present application, optionally, please refer to again Figure 7 , the positive terminal assembly 132 includes a positive riveting block 1324 located on the top side for fixing and conducting with the positive terminal 1321, the negative terminal assembly 133 includes a negative riveting block 1334 located on the top side for fixing and conducting with the negative terminal 1331, and the two ends of the battery cell monitoring module 135 are respectively installed on the bottom sides of the positive riveting block 1324 and the negative riveting block 1334, and respectively have conductive parts that conduct with the positive riveting block 1324 and the negative riveting block 1334.

[0093] Specifically, through holes corresponding to the positive electrode post 1321 and the negative electrode post 1331 can be provided at both ends of the battery cell monitoring module 135, so that the positive electrode post 1321 and the negative electrode post 1331 can pass through the corresponding through holes respectively. One end of the battery cell monitoring module 135 is installed between the positive electrode conductive block 1323 or the upper plastic plate of the positive electrode and the positive electrode riveting block 1324, and the other end is installed between the upper plastic plate 1333 of the negative electrode and the negative electrode riveting block 1334. The positive electrode riveting block 1324 is used to rivet and fix the positive electrode post assembly 132 and is electrically connected to the positive electrode post 1321. The negative electrode riveting block 1334 is used to rivet and fix the negative electrode post assembly 133 and is electrically connected to the negative electrode post 1331. By providing conductive parts at both ends of the battery cell monitoring module 135, surface contact can be respectively achieved with the positive electrode riveting block 1324 and the negative electrode riveting block 1334 for electrical connection, thereby indirectly achieving the electrical connection between the battery cell monitoring module 135 and the positive electrode post 1321 and the negative electrode post 1331. Moreover, the positive electrode riveting block 1324 and the negative electrode riveting block 1334 can rivet and fix both ends of the battery cell monitoring module 135 to realize the installation of the battery cell monitoring module 135 on the top side of the top cover plate 131.

[0094] By integrating both ends of the battery cell monitoring module 135 into the positive electrode post assembly 132 and the negative electrode post assembly 133, both ends of the battery cell monitoring module 135 can be fixed by the positive electrode riveting block 1324 and the negative electrode riveting block 1334. At the same time, through the contact between the conductive parts of the battery cell monitoring module 135 and the positive electrode riveting block 1324 and the negative electrode riveting block 1334, the electrical connection between the battery cell monitoring module 135 and the positive electrode post 1321 and the negative electrode post 1331 can be indirectly achieved.

[0095] According to some embodiments of the present application, optionally, the battery cell monitoring module 135 has an insulating part between the negative electrode mounting hole for passing through the negative electrode post 1331 and the negative electrode post 1331 that abuts against the top cover plate 131, so that the negative electrode post 1331 is insulated and connected to the top cover plate 131.

[0096] When at least part of the battery cell monitoring module 135 is installed in the negative electrode post assembly 133, by providing an insulating part in the battery cell monitoring module 135 that abuts between the negative electrode mounting hole and the negative electrode post 1331, the insulating connection between the negative electrode post 1331 and the top cover plate 131 can be realized, thereby the setting of the upper plastic plate 1333 of the negative electrode can be cancelled, and the structure of the negative electrode post assembly 133 can be simplified.

[0097] When applied to the battery cell 10 with the positive electrode post 1321 being insulated and connected to the top cover sheet 131, and when the battery cell monitoring module 135 is at least partially installed in the positive electrode post assembly 132, the insulated connection between the positive electrode post 1321 and the top cover sheet 131 can be achieved by providing an insulating portion in the battery cell monitoring module 135 that abuts between the positive electrode mounting hole and the positive electrode post 1321. Thus, the setting of the plastic plate on the positive electrode can be cancelled to simplify the structure of the positive electrode post assembly 132.

[0098] Such a design can replace the structure in the negative electrode post assembly 133 that insulates the negative electrode post 1331 from the top cover sheet 131 by means of the battery cell monitoring assembly, so as to simplify the structure of the negative electrode post assembly 133.

[0099] According to some embodiments of the present application, optionally, please refer to Figure 8 , as shown in the figure, the battery cell monitoring module 135 at least includes: an information acquisition unit 1351, a communication unit 1352, a balancing unit 1353 and a processing unit 1354. The information acquisition unit 1351, the communication unit 1352 and the balancing unit 1353 are respectively electrically connected to the processing unit 1354.

[0100] The information acquisition unit 1351 is used to collect various parameters of the battery cell body 12, such as: the voltage value of the battery cell body 12, the temperature value of the battery cell body 12, the pressure value of the battery cell body 12, etc. Specifically, the information acquisition unit 1351 can but is not limited to include: a voltage detection circuit, a temperature sensor, a pressure sensor, a gas and aerosol sensor, etc.; among them, the voltage detection circuit can be integrated into the battery cell monitoring module 135 and is electrically connected to the positive electrode post 1321 and the negative electrode post 1331 respectively to collect the potential difference between the positive electrode post 1321 and the negative electrode post 1331 of the battery cell body 12, and can be used to give an alarm when the voltage is higher than a fixed threshold or the change rate exceeds a specified threshold; the number of temperature sensors can be one or more, and the position can be integrated in the battery cell monitoring module 135 to detect the temperature of the battery cell body 12, and can be used to give an alarm when the temperature is higher than a fixed threshold or the change rate exceeds a specified threshold; the pressure sensor can be externally placed on the battery cell monitoring module 135 and can be but is not limited to set in the pressure acquisition area of the battery cell body 12 to detect the pressure in this area of the battery cell body 12; the gas and aerosol sensor can be integrated into the battery cell monitoring module 135 or can also be externally placed on the battery cell monitoring module 135, for example: set outside the battery cell unit 10 to detect the concentration of the gas around the battery cell body 12, so as to be used to judge whether the battery cell body 12 leaks liquid and the liquid leakage situation. The information acquisition unit 1351 is electrically connected to the processing unit 1354 and can transmit the various collected parameters to the processing unit 1354 for processing by the processing unit 1354. Further, each sensor included in the information acquisition unit 1351 can be set as a MEMS (Micro Electro-Mechanical System) sensor, and the MEMS sensor has the advantages of small volume, low power consumption, and easy integration.

[0101] The communication unit 1352 is used to realize the interaction between the battery cell monitoring module 135 and the outside world. The communication unit 1352 is electrically connected to the processing unit 1354, can transmit information to the processing unit 1354, and can receive instructions from the processing unit 1354. Further, the communication unit 1352 can mainly adopt the form of wireless communication and can be specifically realized through communication technologies such as Bluetooth, WIFI, RFID, NFC, etc.

[0102] The balancing unit 1353 is used to balance the voltage of the battery cell body 12. For example, when the voltage of the battery cell body 12 is higher than that of the battery cell bodies 12 of other battery monomers 10, the battery cell body 12 can be discharged to achieve voltage balance. Further, the voltage detection circuit included in the above information acquisition unit 1351 and the balancing unit 1353 can be implemented by an AFE (Analog Front End) unit, which has EIS (Electrochemical Impedance Spectroscopy) test and current measurement functions.

[0103] The processing unit 1354 is the core of the battery cell monitoring module 135. The rest of the units of the battery cell monitoring module 135 are respectively electrically connected to the processing unit 1354. The processing unit 1354 can process and analyze the input signals fed back by the rest of the units of the battery cell monitoring module 135, and perform data storage and communication management.

[0104] It should be noted that each functional unit included in the battery cell monitoring module 135 can implement the functions of each unit through an integrated chip, or different functional chips can also be used to implement the functions of different units, and then integrated on the battery cell monitoring module 135.

[0105] Such a design can realize real-time and reliable monitoring of various parameters of the battery cell body 12 by the battery cell monitoring module 135, and effectively manage the battery cell body 12.

[0106] According to some embodiments of the present application, optionally, please refer to Figure 9 , as shown in the figure, the battery cell monitoring module 135 further includes: a power supply unit 1355 and a storage unit 1356. The power supply unit 1355 is respectively electrically connected to the rest of the units of the battery cell monitoring module 135, and the storage unit 1356 is electrically connected to the processing unit 1354.

[0107] The main function of the power supply unit 1355 is to convert the changing battery cell voltage into a stable voltage output for powering other units, and can ensure that other units have a stable input power supply.

[0108] The storage unit 1356 is mainly used to store the basic product information data of the battery cell body 12 and the battery cell monitoring module 135, as well as related fault data, which is beneficial to the cascade utilization and traceability of the battery cell body 12. Specifically, the storage unit 1355, the power supply unit 1355, and the above-mentioned processing unit 1354 and communication unit 1352 can be implemented by a wireless MCU (Microcontroller Unit).

[0109] The power supply module can ensure a stable input power supply for other units of the battery cell monitoring module 135. The setting of the storage unit 1356 is beneficial to the cascade utilization and traceability of the battery cell body 12, and is beneficial to the monitoring and management of the battery cell body 12 by the battery cell monitoring module 135.

[0110] According to some embodiments of the present application, please refer to Figure 10 , the present application also provides a battery cell 10, including: a housing 11, a battery cell body 12 accommodated inside the housing 11, and the top cover assembly 13 described in any of the above solutions.

[0111] According to some embodiments of the present application, optionally, please refer to again Figure 10 , the information acquisition unit 1351 of the battery cell monitoring module 135 at least includes: a temperature sensor, and the temperature sensor is arranged inside the battery cell body 12.

[0112] Integrating the temperature sensor inside the battery cell body 12 can collect the temperature of the battery cell body 12 more directly and accurately. The position of the temperature sensor inside the battery cell body 12 can be located at Figure 10 the position corresponding to the dotted line frame inside the battery cell body 12 in, or can also be determined according to actual needs.

[0113] According to some embodiments of the present application, optionally, please refer to again Figure 10 , the information acquisition unit 1351 of the battery cell monitoring module 135 at least includes: a pressure sensor, and the pressure sensor is arranged inside the battery cell body 12.

[0114] Integrating the pressure sensor inside the battery cell body 12 can collect the expansion force of the battery cell body 12 more directly and accurately. The position of the pressure sensor inside the battery cell body 12 can be located at Figure 10 the position corresponding to the dotted line frame inside the battery cell body 12 in, or can also be determined according to actual needs.

[0115] According to some embodiments of the present application, the present application also provides a battery 100, a battery management module; the battery cell 10 described in any of the above solutions, and the communication unit 1352 of the battery cell monitoring module 135 of the battery cell 10 is electrically connected to the battery management module.

[0116] According to some embodiments of the present application, the present application also provides an electrical device, including the battery 100 described in any of the above solutions.

[0117] The battery 100 is used to provide electrical energy for the electrical device, and the electrical device can be a device or system that applies the battery 100 described in any of the above solutions.

[0118] According to some embodiments of the present application, see Figures 5 to 9, this application provides a top cover assembly 13. The battery cell monitoring module 135 is integrated on the top side of the top cover sheet 131 and is electrically connected to the positive terminal assembly 132 and the negative terminal assembly 133. The battery cell monitoring module 135 can be directly powered by the battery cell body 12, enabling the battery cell monitoring module 135 to monitor and manage the status of each battery cell 10 in real time and reliably. After the battery cell monitoring module 135 is installed, at least part of it is exposed outside the top cover sheet 131, which facilitates the repair, maintenance, etc. of the battery cell monitoring module 135 during use and can achieve higher battery safety management; the battery cell monitoring module 135 can be integrated on the top cover sheet 131 and located in the positive terminal assembly 132 or the negative terminal assembly 133, which can reduce the volume of the battery cell monitoring module 135 and is flexible to use; or, the battery cell monitoring module 135 can be integrated on the top cover sheet 131 and located at a position between the positive terminal assembly 132 and the negative terminal assembly 133, and avoid the installation position of the pressure relief device 134 on the top cover sheet 131, which can be flexibly applied and is convenient for the disassembly and assembly of the battery cell monitoring module 135 and for maintenance; or, the battery cell monitoring module 135 can be integrated on the top cover sheet 131 and span the positive terminal assembly 132 and the negative terminal assembly 133, which can increase the volume of the battery cell monitoring module 135, provide the possibility of integrating more functions, and does not require additional wiring. The battery cell monitoring module 135 includes multiple functional units that can achieve real-time and reliable monitoring of various parameters of the battery cell body and effective management of the battery cell body 12.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A top cover assembly for sealing a housing that houses a battery cell body, characterized in that, Comprising: A top cover sheet, a positive terminal assembly and a negative terminal assembly provided at both ends of the top cover sheet, and the negative terminal assembly is insulated and connected to the top cover sheet; A battery cell monitoring module, installed on the top cover sheet and at least partially exposed outside the top cover sheet, and electrically connected to the positive terminal assembly and the negative terminal assembly, for monitoring and managing the battery cell body; At least part of the battery cell monitoring module is located in the positive terminal assembly and / or the negative terminal assembly; The positive terminal assembly includes a positive riveting block located on the top side for fixing and conducting with the positive terminal, and at least part of the battery cell monitoring module is installed on the bottom side of the positive riveting block; and / or, the negative terminal assembly includes a negative riveting block located on the top side for fixing and conducting with the negative terminal, and at least part of the battery cell monitoring module is installed on the bottom side of the negative riveting block.

2. The top cover assembly according to claim 1, characterized in that, The battery cell monitoring module is installed on the top side of the top cover sheet, and at least part of it is conducted with the positive terminal of the positive terminal assembly or the negative terminal of the negative terminal assembly, and is electrically connected to the negative terminal or the positive terminal through a wire harness.

3. The top cover assembly according to claim 2, characterized in that, At least part of the battery cell monitoring module is located in the positive terminal assembly; the battery cell monitoring module has a conductive part that is conducted with the positive riveting block.

4. The top cover assembly according to claim 2, characterized in that At least part of the battery cell monitoring module is located in the negative terminal assembly; the battery cell monitoring module has a conductive part that is conducted with the negative riveting block.

5. The top cover assembly according to claim 1, wherein An installation groove is provided on the top side surface of the top cover sheet, the battery cell monitoring module is installed in the installation groove, and the battery cell monitoring module is electrically connected to the positive terminal and the negative terminal through a wire harness.

6. The top cover assembly according to claim 5, characterized in that The installation groove is located between the installation positions of the positive terminal assembly and the pressure relief device on the top cover sheet, or the installation groove is located between the installation positions of the negative terminal assembly and the pressure relief device on the top cover sheet.

7. The top cover assembly according to claim 1, characterized in that The battery cell monitoring module is installed on the top side of the top cover sheet, and the two end parts of the battery cell monitoring module are respectively located in the positive terminal assembly and the negative terminal assembly to realize conduction with the positive terminal of the positive terminal assembly and the negative terminal of the negative terminal assembly.

8. The top cover assembly according to claim 7, wherein The battery cell monitoring module is located on the top side of the pressure relief device on the top cover sheet and is spaced apart from the pressure relief device by a preset distance.

9. The top cover assembly according to claim 7, wherein, An avoidance hole corresponding to and adapted to the pressure relief device on the top cover sheet is provided on the battery cell monitoring module.

10. The top cover assembly according to claim 7, wherein The two end parts of the battery cell monitoring module are respectively installed on the bottom sides of the positive riveting block and the negative riveting block, and respectively have conductive parts that are conducted with the positive riveting block and the negative riveting block.

11. The top cover assembly according to claim 4 or 10, characterized in that, The battery cell monitoring module has an insulating part that abuts between the negative installation hole for passing through the negative terminal on the top cover sheet and the negative terminal, so that the negative terminal is insulated and connected to the top cover sheet.

12. The top cover assembly according to claim 1, characterized in that, The battery cell monitoring module at least includes: an information acquisition unit, a communication unit, an equalization unit and a processing unit, and the information acquisition unit, the communication unit and the equalization unit are respectively electrically connected to the processing unit.

13. The top cover assembly according to claim 12, characterized in that, The battery cell monitoring module further includes: a power supply unit and a storage unit. The power supply unit is electrically connected to the other units of the battery cell monitoring module respectively, and the storage unit is electrically connected to the processing unit.

14. A battery cell, characterized in that, Comprising: a housing, a battery cell body accommodated inside the housing, and any one of the top cover assemblies according to claims 1-13.

15. The battery cell according to claim 14, wherein, The information acquisition unit of the battery cell monitoring module in the top cover assembly at least includes: a temperature sensor, and the temperature sensor is disposed inside the battery cell body.

16. The battery cell according to claim 14, characterized in that, The information acquisition unit of the battery cell monitoring module in the top cover assembly at least includes: a pressure sensor, and the pressure sensor is disposed inside the battery cell body.

17. A battery, characterized in that, Comprising: a battery management module; a plurality of battery monomers according to any one of claims 14-16, and the communication unit of the battery cell monitoring module of the battery monomer is electrically connected to the battery management module.

18. An electrical device, characterized in that, Comprising: the battery according to claim 17.

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