Battery cell, battery and electric device

Abstract

The utility model provides a battery monomer, a battery and a power utilization device. The battery monomer comprises a shell and at least one integrated circuit device, the shell has an accommodating cavity; the integrated circuit device comprises a detection element, the detection element is used for detecting the working condition of the single battery, and the integrated circuit device is arranged in the accommodating cavity or outside the accommodating cavity. According to the battery monomer provided by the embodiment of the invention, the working condition inside the battery monomer can be known in real time by utilizing the detection element, so that the control element inside or outside the battery monomer can conveniently make or not make corresponding reaction operation, and the possibility of further deterioration of potential safety hazards existing in the battery monomer is reduced; and the safety performance of the battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more particularly, to a battery cell, a battery, and an electrical device. Background Art

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy planes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells.

[0003] In the development of battery cell technology, in addition to improving the performance of battery cells, how to detect the internal working conditions of battery cells during the operation of battery cells and respond accordingly in a timely manner to improve the safety performance of battery cells is a technical issue that requires continuous improvement in battery cell technology. Summary of the Invention

[0004] The present application provides a battery cell, a battery, and an electrical device, which can improve the safety performance of the battery cell.

[0005] In a first aspect, an embodiment of the present application provides a battery cell, which includes a shell and at least one integrated circuit device; the shell has a accommodating cavity; the integrated circuit device includes a detection element, which is used to detect the working condition of the battery cell, and the integrated circuit device is arranged in the accommodating cavity or outside the accommodating cavity.

[0006] According to the battery cell provided in the embodiment of the present application, by setting an integrated circuit device, and setting the integrated circuit device to include a detection element, the detection element can be used to understand the working conditions inside the battery cell in real time, which is convenient for the control elements inside or outside the battery cell to make or not make corresponding response operations, so as to reduce the possibility of further deterioration of the safety hazards existing in the battery cell. This is conducive to improving the safety performance of the battery cell.

[0007] In some embodiments, the integrated circuit device is in the form of a plate, sheet, or block. Depending on where the integrated circuit device is to be placed, a suitable shape can be selected to accommodate the internal spatial layout of the battery cell, minimizing the additional internal space required by the integrated circuit device. This allows for real-time monitoring of the battery cell's operating status while also ensuring the energy density of the battery cell.

[0008] In some embodiments, the detection element includes a temperature sensor, a pressure sensor, a stress sensor, a current sensor, a gas composition detection sensor, a Bragg grating or a Fabry-Perot resonant cavity. This is conducive to the integrated circuit device to obtain the working status of the battery cell more timely and accurately.

[0009] In some embodiments, at least one integrated circuit device further includes a wireless communication unit configured to communicate wirelessly with the outside of the battery cell. This configuration can simplify the circuit connection structure of the battery cell and reduce the complexity of the circuit layout inside or outside the battery.

[0010] In some embodiments, the battery cell further includes an electrode assembly housed within the housing cavity, the electrode assembly including an electrode body and a tab extending from an end of the electrode body; at least one integrated circuit device is disposed on the tab, and / or at least one integrated circuit device is disposed on the electrode body. In this manner, a detection element in the integrated circuit device can be used to detect information such as the current or temperature of the tab to facilitate determination of the tab's overcurrent capacity or heat generation; alternatively, the detection element in the integrated circuit device can be used to detect stress within or on the surface of the electrode body to facilitate determination of the electrode body's expansion; alternatively, the detection element in the integrated circuit device can be used to detect information such as the temperature of the electrode body.

[0011] In some embodiments, the electrode body includes two first surfaces arranged opposite each other along a first direction and two second surfaces arranged opposite each other along a second direction, with the two first surfaces connecting the two second surfaces. The first surface is arcuate, and the tabs extend from the ends of the electrode body along a third direction. The first, second, and third directions are perpendicular to each other. At least one integrated circuit device is disposed on the first surface. This helps save internal space in the battery cell and improve the energy density of the battery cell.

[0012] In some embodiments, the battery cell further includes a current collector electrically connected to the tab; the tab surface facing the housing includes a first connection region and a second connection region, the first connection region being connected to the current collector, and at least one integrated circuit device being disposed in the second connection region and spaced apart from the current collector. This arrangement facilitates connection between the integrated circuit device and the tab, while spacing the integrated circuit device from the current collector reduces the risk of electrical connection between the integrated circuit device and the current collector, thereby reducing the possibility of affecting the normal operation of the integrated circuit device or the current collector.

[0013] In some embodiments, the battery cell further includes an electrode assembly and an insulating member, the insulating member and the electrode assembly being located within the accommodating cavity, with the insulating member disposed between the outer shell and the peripheral surface of the electrode assembly; and at least one integrated circuit device disposed within the insulating member. The detection element within the integrated circuit device may include a stress sensor, etc., for detecting stress within the insulating member to provide real-time information on damage to the insulating member.

[0014] In some embodiments, the housing includes a first wall, and at least one integrated circuit device is disposed on the first wall. This arrangement allows real-time information such as the temperature of the first wall of the battery cell to be obtained, and the operating condition of the battery cell can be determined based on the temperature information of the first wall.

[0015] In some embodiments, the integrated circuit device is connected to the first wall by adhesive bonding, clamping or thermal melting, so that the connection between the integrated circuit device and the first wall is simple and reliable.

[0016] In some embodiments, the first wall has a groove, and at least one integrated circuit device is disposed in the groove. This helps reduce the space occupied by the integrated circuit device inside or outside the battery cell, improves the energy density of the battery cell, or facilitates the grouping of battery cells.

[0017] In some embodiments, the depth of the groove is h1, the thickness of the integrated circuit device is h2, and h1 ≥ h2. In this way, the integrated circuit device is completely located within the groove, which not only reduces the additional space occupied by the integrated circuit device, but also increases the energy density of the battery cell and reduces the risk of the integrated circuit device falling off the first wall due to impact or scratches.

[0018] In some embodiments, the first wall has a boss, and at least one integrated circuit device is disposed on the boss, which is beneficial for improving the connection strength and connection stability between the integrated circuit device and the first wall.

[0019] In some embodiments, the housing includes a first wall, the battery cell further includes a support member, at least one integrated circuit device is connected to the support member, and the support member is connected to the first wall. This simplifies the assembly process of the battery cell, thereby improving the production efficiency of the battery cell and facilitating improved connection stability of the integrated circuit device.

[0020] In some embodiments, the support member is connected to the first wall by heat melting, adhesive bonding or clamping, so that the connection method is simple and the connection reliability is high.

[0021] In some embodiments, at least one integrated circuit device is connected to the support member by adhesive bonding, snap bonding, or thermal melting, thereby facilitating the connection between the integrated circuit device and the support member.

[0022] In some embodiments, the first wall includes a main body and an insulating portion, the insulating portion being located on a side of the main body near the accommodating cavity. The insulating portion includes a protrusion projecting toward the accommodating cavity, and at least one integrated circuit device is located on the insulating portion. The integrated circuit device and the protrusion are arranged side by side in a direction perpendicular to the thickness of the first wall. This helps conserve space within the battery cell and reduces the compressive force between the integrated circuit device and the electrode assembly, thereby reducing the risk of the integrated circuit device damaging the surface of the electrode assembly.

[0023] In some embodiments, the maximum dimension of the integrated circuit device along the thickness direction is smaller than the dimension of the protrusion. Thus, when the protrusion presses against the electrode assembly, a certain gap still exists between the integrated circuit device and the electrode assembly, thereby reducing the additional space occupied by the integrated circuit device within the battery cell and the risk of interference between the integrated circuit device and the electrode assembly.

[0024] In some embodiments, the battery cell further includes electrode terminals, which are disposed through the body portion and the insulating portion. The integrated circuit device is spaced apart from the electrode terminals along a thickness direction perpendicular to the first wall. This reduces the risk of interference between the integrated circuit device and the electrode terminals, and reduces the risk of electrical connection between the integrated circuit device and the electrode terminals, which could affect the normal operation of the battery cell.

[0025] In some embodiments, at least one integrated circuit device is disposed on a side of the first wall facing the accommodating cavity; the battery cell includes multiple electrode assemblies, each of which has two first surfaces disposed oppositely along a first direction and two second surfaces disposed oppositely along a second direction, the two first surfaces connecting the two second surfaces; the first surface is arcuate, with the first direction perpendicular to the second direction and parallel to the thickness of the first wall; and the at least one integrated circuit device is located between two adjacent first surfaces along the second direction. In this manner, the space enclosed by the arcuate surfaces of two adjacent electrode assemblies in the battery cell and the first wall is utilized to accommodate the integrated circuit device, thereby facilitating the rational use of the internal space of the battery cell, reducing the internal space of the battery cell increased by the installation of the integrated circuit device, and facilitating the improvement of the energy density of the battery cell.

[0026] In some embodiments, the battery cell further includes a first wall and an electrode terminal. The electrode terminal is disposed on the first wall and is used to transmit electrical energy. At least one integrated circuit device is connected to a portion of the end surface of the electrode terminal located outside the receiving cavity. In this manner, the integrated circuit device can be used to detect information such as the temperature of the electrode terminal or the current flowing through the electrode terminal, thereby providing real-time information on the operating status of the electrode terminal.

[0027] In some embodiments, the integrated circuit device is connected to the electrode terminal by adhesive bonding or welding, so that the connection between the integrated circuit and the electrode terminal is simple and has good connection stability.

[0028] In some embodiments, the housing includes a first wall, and the battery cell further includes a support, an insulating member, and electrode terminals. The electrode terminals are used to transmit electrical energy, and the insulating member is used to insulate the electrode terminals from the first wall. The support is connected to the insulating member, and at least one integrated circuit device is disposed on the support. This arrangement simplifies the battery cell assembly process while improving the connection stability of the integrated circuit device and reducing the risk of the integrated circuit device falling off due to the improved connection stability between the integrated circuit device and the support, and between the support and the insulating member.

[0029] In a second aspect, an embodiment of the present application provides a battery, comprising a battery cell as in any embodiment of the first aspect.

[0030] The battery provided according to the embodiment of the present application has the same technical effects as the battery cells provided by any of the above embodiments, and thus will not be described in detail here.

[0031] In some embodiments, the battery also includes a busbar and a wiring harness isolator. The busbar is used to electrically connect two adjacent battery cells. The busbar is connected to the wiring harness isolator, and at least one integrated circuit device is located on the side of the wiring harness isolator facing the battery cells. The space between the wiring harness isolator and the battery cells is used to accommodate the integrated circuit device, reducing the additional space occupied by the integrated circuit device. The integrated circuit device can also be configured to detect changes in pressure, temperature, and other factors to provide real-time information on the operating status of the corresponding battery cells.

[0032] In a third aspect, an embodiment of the present application provides an electrical device, comprising a battery as in the embodiment of the second aspect, the battery being used to provide electrical energy.

[0033] The electrical device provided in the embodiment of the present application has the same technical effects as the battery provided in the embodiment of the present application, and thus will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0035] Figure 1 A schematic structural diagram of a vehicle provided in one embodiment of the present application;

[0036] Figure 2 An exploded diagram of a battery provided in one embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of a battery module in a battery provided in an embodiment of the present application;

[0038] Figure 4 A schematic diagram of an explosion of a battery cell provided in some embodiments of the present application;

[0039] Figure 5 A schematic diagram of the structure of a battery cell provided in an embodiment of the present application with some structures omitted;

[0040] Figure 6 A schematic structural diagram of another battery cell provided in an embodiment of the present application with some structures omitted;

[0041] Figure 7 A schematic structural diagram of another battery cell provided in an embodiment of the present application with some structures omitted;

[0042] Figure 8 A schematic structural diagram of another battery cell provided in an embodiment of the present application with some structures omitted;

[0043] Figure 9 A schematic diagram of the connection structure between the housing and the integrated circuit device in the battery cell provided in an embodiment of the present application;

[0044] Figure 10 A schematic structural diagram of a battery cell provided in an embodiment of the present application;

[0045] Figure 11 A schematic structural diagram of another battery cell provided in an embodiment of the present application with some structures omitted;

[0046] Figure 12 A front view of a battery cell provided in an embodiment of the present application;

[0047] Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along AA;

[0048] Figure 14 A schematic structural diagram of another battery cell provided in an embodiment of the present application;

[0049] Figure 15 A schematic structural diagram of a first wall, a support member, and an integrated circuit device in a battery cell provided in an embodiment of the present application;

[0050] Figure 16 A schematic diagram of the connection structure between the first wall and the integrated circuit device in a battery cell used in an embodiment of the application;

[0051] Figure 17 A schematic diagram of the connection structure between the integrated circuit device and the electrode terminals in the battery cell provided by an embodiment of the present application;

[0052] Figure 18A structure schematic view of a battery monomer integrated circuit device connected with an insulating member through a support member according to an embodiment of the present application;

[0053] Figure 19 A structure schematic view of an explosion structure according to an embodiment of the present application; Figure 18

[0054] Figure 20 A structure schematic view of a battery omitting part according to an embodiment of the present application;

[0055] Figure 21 A structure schematic view of an explosion structure according to an embodiment of the present application; Figure 20 A structure schematic view along B-B according to an embodiment of the present application.

[0056] In the drawings, the drawings are not drawn according to the actual proportion.

[0057] Explanation of reference numerals:

[0058] 1, vehicle; 1a, motor; 1b, controller;

[0059] 10, battery; 11, first box body part; 12, second box body part;

[0060] 20, battery module;

[0061] 30, battery monomer; 31, housing; 31a, accommodating cavity; 311, shell; 311a, opening; 312, end cover; 313, first wall; 313a, groove; 313b, boss; 3131, body part; 3132, insulating part; 3132a, protrusion; 32, electrode assembly; 321, electrode body; 321a, first surface; 321b, second surface; 322, tab; 33, electrode terminal; 34, integrated circuit device; 35, current collector; 36, insulating member; 37, support member; 38, support member; 39, insulating member;

[0062] 40, current collector;

[0063] 50, wire harness isolation member;

[0064] X, first direction; Y, second direction; Z, third direction; O, thickness direction. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0066] ​Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only 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-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0067] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0069] The term "and / or" in this application simply describes the relationship between related objects, indicating that three possible relationships exist. For example, C and / or D can mean: C exists alone, C and D exist simultaneously, or D exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0070] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0071] The term "plurality" used in this application refers to two or more (including two).

[0072] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0073] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0074] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector includes a positive current collector portion and a positive protrusion protruding from the positive current collector portion. The positive current collector portion is coated with the positive active material layer. At least a portion of the positive protrusion portion is not coated with the positive active material layer. The positive protrusion portion serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum. The positive active material layer includes a positive active material. The positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, among others. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collecting portion and a negative electrode protrusion protruding from the negative electrode current collecting portion, the negative electrode current collecting portion is coated with the negative electrode active material layer, and at least part of the negative electrode protrusion is not coated with the negative electrode active material layer, and the negative electrode protrusion serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc. In addition, the electrode assembly can be a wound structure or a laminated structure, and the embodiments of the present application are not limited to this.

[0075] After discovering the problem of low safety performance of battery cells, the inventors conducted a systematic analysis and research on the structure and operation of battery cells. The results showed that during the operation of the battery cells, the specific internal working conditions of the battery cells cannot be predicted. As a result, when the battery cells are exposed to harsh operating conditions, such as high temperature or high pressure, the operator or its control components cannot respond accordingly. As the battery cells operate under harsh conditions for a longer time, they may cause adverse consequences such as explosions, seriously affecting the safety performance of the battery cells.

[0076] Based on the above problems discovered by the inventors, the inventors have improved the structure of the battery cell. The technical solutions described in the embodiments of this application are applicable to battery cells, batteries containing battery cells, and electrical devices using batteries.

[0077] A battery cell provided according to an embodiment of the present application includes a housing and at least one integrated circuit device. The housing has a receiving cavity, and the integrated circuit device includes a detection element for detecting the operating condition of the battery cell. The integrated circuit device is disposed within or outside the receiving cavity.

[0078] The battery cell provided in the embodiment of the present application is provided with an integrated circuit device including a detection element, and the integrated circuit device is arranged inside or outside the battery cell to obtain the working status of the battery cell in real time through the detection element. When the detection element detects that there are certain safety hazards in the battery cell, it can transmit information to an external control unit so that the control element controls the battery cell to make or not make a corresponding response, or the control element issues an alarm so that the operator can make a corresponding response, thereby reducing the risk of further deterioration of the safety hazards in the battery cell. This is conducive to improving the safety performance of the battery cell.

[0079] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0080] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0081] like Figure 1 As shown, a battery 10 is provided inside the vehicle 1. The battery 10 can be provided at the bottom, head, or tail of the vehicle 1. The battery 10 can be used to power the vehicle 1, for example, the battery 10 can serve as an operating power source for the vehicle 1.

[0082] The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 to supply power to the motor 1a, for example, to meet the power requirements of the vehicle 1 during starting, navigation, and driving.

[0083] In some embodiments of the present application, the battery 10 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0084] See also Figure 2 As shown, the battery 10 includes a battery cell ( Figure 2 (not shown) The battery 10 may further include a case for accommodating the battery cells.

[0085] The box body is used to accommodate battery cells, and the box body can be of various structural forms. In some embodiments, the box body may include a first box body portion 11 and a second box body portion 12. The first box body portion 11 and the second box body portion 12 cover each other. The first box body portion 11 and the second box body portion 12 jointly define a storage space for accommodating battery cells. The second box body portion 12 can be a hollow structure with one end open, and the first box body portion 11 is a plate-shaped structure. The first box body portion 11 covers the open side of the second box body portion 12 to form a box body with a storage space; the first box body portion 11 and the second box body portion 12 can also be hollow structures with one side open. The open side of the first box body portion 11 covers the open side of the second box body portion 12 to form a box body with a storage space. Of course, the first box body portion 11 and the second box body portion 12 can be of various shapes, such as cylinders, cuboids, etc.

[0086] In order to improve the sealing performance after the first box body 11 and the second box body 12 are connected, a sealing member such as a sealant or a sealing ring may be provided between the first box body 11 and the second box body 12 .

[0087] Assuming that the first box body portion 11 covers the second box body portion 12 , the first box body portion 11 can also be referred to as an upper box cover, and the second box body portion 12 can also be referred to as a lower box body.

[0088] In the battery 10, there can be one or more battery cells. If there are multiple battery cells, they can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery module 20 is housed in a housing. Alternatively, multiple battery cells can be first connected in series, in parallel, or in a hybrid connection to form a battery module 20. Multiple battery modules 20 are then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed in a housing.

[0089] In some embodiments, as Figure 3 As shown, Figure 3 for Figure 2 The battery module 20 is shown as a schematic diagram of its structure. In the battery module 20, there are multiple battery cells 30. The multiple battery cells 30 are first connected in series, parallel, or in series to form the battery module 20. The multiple battery modules 20 are then connected in series, parallel, or in series to form a whole, which is then housed in a housing.

[0090] In some embodiments, the multiple battery cells 30 in the battery module 20 may be electrically connected via a busbar component to achieve parallel connection, series connection, or mixed connection of the multiple battery cells 30 in the battery module 20 .

[0091] Please refer to Figure 4 , Figure 4 for Figure 3 An exploded schematic diagram of a battery cell 30 is shown.

[0092] A battery cell 30 according to an embodiment of the present application includes a housing 31 and at least one integrated circuit device 34. The housing 31 has a receiving cavity 31a. The integrated circuit device 34 includes a detection element for detecting the operating status of the battery cell 30. Basic cooling circuit components are located within or outside the receiving cavity 31a.

[0093] In some embodiments, the battery cell 30 further includes an electrode assembly 32 , which is accommodated in the accommodation cavity 31 a .

[0094] In some embodiments, the housing 31 may include a shell 311 and an end cover 312, wherein the shell 311 is a hollow structure having an opening 311a on one side, and the end cover 312 covers the opening 311a of the shell 311 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 32 and the electrolyte.

[0095] When assembling the battery cell 30 , the electrode assembly 32 may be placed in the housing 311 , the end cap 312 may be placed over the opening 311 a of the housing 311 , and the electrolyte may be injected into the housing 311 through the electrolyte injection port on the end cap 312 .

[0096] In some embodiments, the housing 31 may also be used to contain electrolyte, such as electrolyte solution. The housing 31 may have various structural forms.

[0097] The shell 311 can be in various shapes, such as a cylinder, a cuboid, etc. The shape of the shell 311 can be determined according to the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 is a cylindrical structure, the shell 311 can be a cylindrical structure. If the electrode assembly 32 is a cuboid structure, the shell 311 can be a cuboid structure. Figure 4 In the embodiment, for example, the shell 311 and the electrode assembly 32 are both rectangular parallelepiped structures.

[0098] The shell 311 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0099] There may be one or more electrode assemblies 32 housed in the housing 311. Figure 4 In the embodiment, there are two electrode assemblies 32 housed in the shell 311.

[0100] Various detection units, circuits or related control devices can be integrated on the integrated circuit device 34. The shape of the integrated circuit device 34 can be plate-shaped, block-shaped, sheet-shaped, spherical, conical or other irregular shapes, which can be selected according to actual needs.

[0101] Optionally, the integrated circuit device 34 may be provided on the housing 31 , or on the electrode assembly 32 , or on other structures of the battery cell 30 , and may be set according to specific parameters inside the battery cell 30 that need to be detected.

[0102] In the embodiment where the integrated circuit device 34 is disposed in the housing 31, the integrated circuit device 34 may be disposed on the housing 311 or on the end cap 312. The integrated circuit device 34 may also be disposed inside the housing 31, outside the housing 31, or both inside and outside the housing 31.

[0103] Alternatively, the detection element may be a sensor, such as a temperature sensor, a pressure sensor, or a strain sensor, to detect parameters such as temperature, pressure, or strain at a corresponding location. Of course, the detection element may also be other components for detecting the gas composition and content within the battery cell 30.

[0104] For example, a detection element can be provided to detect the air pressure inside the battery cell 30 and transmit the detection result to the relevant control element so that the control element can make corresponding adjustments to reduce the risk of further increase in the air pressure inside the battery cell 30 and affect the safety performance of the battery cell 30. Alternatively, a detection element can be provided to detect any temperature of the battery cell 30 that needs to be known so that the control unit inside or outside the battery cell 30 can respond accordingly to reduce the risk of further increase in its temperature. Alternatively, a detection element can be provided to detect the content of a specific gas inside the battery cell 30 so that the relevant control element can determine whether the battery cell 30 is in a normal cyclic operation state. When the content of the specific gas is not within a preset range, the control element can control the battery cell 30 to take corresponding remedial measures, or the control element can issue an alarm so that the operator can take relevant remedial measures in a timely manner to ensure the normal operation of the battery cell 30.

[0105] Optionally, one battery cell 30 may be provided with one integrated circuit device 34 or multiple integrated circuit devices 34. One integrated circuit device 34 may be integrated with one detection element or multiple detection elements at the same time.

[0106] In an embodiment where a battery cell 30 is provided with a plurality of integrated circuit devices 34, the structures of different integrated circuit devices 34 may be the same, or the structures of different integrated circuit devices 34 or the functions of the detection elements therein may be different, and different integrated circuit devices 34 may be located at corresponding different positions, so as to enable different integrated circuit devices 34 to detect different operating parameters of the battery cell 30.

[0107] In some embodiments, the integrated circuit device 34 can be electrically connected to the control element inside or outside the battery cell 30 through an optical fiber or cable, so that the integrated circuit device 34 can transmit the detected parameter information of the battery cell 30 to the control element, so that the control element can make a corresponding response or no response based on the detection results.

[0108] Of course, the integrated circuit device 34 can also communicate with the internal or external control elements of the battery cell 30 through wireless communication. That is, the integrated circuit device 34 is not connected to the external control element through a wired line, but instead transmits the detected operating conditions of the battery cell 30 to the control element outside the battery cell 30 through wireless transmission.

[0109] The battery cell 30 provided in the embodiment of the present application is provided with an integrated circuit device 34, and the integrated circuit device 34 is provided with a detection element. The detection element can be used to understand the working conditions inside the battery cell 30 in real time, so as to facilitate the control elements inside or outside the battery cell 30 to make or not make corresponding response operations, thereby reducing the possibility of further deterioration of the safety hazards existing in the battery cell 30. This is conducive to improving the safety performance of the battery cell 30.

[0110] In some embodiments, the integrated circuit device 34 is in the form of a plate, a sheet, or a block.

[0111] The integrated circuit device 34 can be positioned where it is to be installed, and its shape can be selected to fit the internal spatial layout of the battery cell 30, thereby minimizing the internal space of the battery cell 30 increased by the installation of the integrated circuit device 34. This helps ensure the energy density of the battery cell 30 while enabling real-time monitoring of the operating status of the battery cell 30.

[0112] For example, when the electrode assembly 32 is cylindrical, the integrated circuit device 34 can be configured to have an arc shape that matches the surface of the cylindrical electrode assembly 32. If part of the surface of the electrode assembly 32 is flat and another part is arc-shaped, the integrated circuit device 34 can be configured to have a flat plate shape or an arc shape that matches the arc-shaped surface of the electrode assembly 32, depending on the relative position of the integrated circuit device 34 and the electrode assembly 32.

[0113] In some embodiments, the detection element includes a temperature sensor, a pressure sensor, a current sensor, a gas component detection sensor, a Bragg grating, or a Fabry-Perot cavity.

[0114] Specifically, a temperature sensor can be used to measure the temperature at a specific location on the battery cell 30, a pressure sensor can be used to measure the gas pressure at a specific location on the battery cell 30, and a current sensor can be used to measure the current flowing through relevant structures of the battery cell 30, such as the electrode terminals 33. A gas composition detection sensor can be used to detect the composition and content of the gas within the battery cell 30, such as the content of gas components produced by electrolyte decomposition, to determine the electrolyte content within the battery cell 30. A Bragg grating can be used to detect hydrogen gas within the battery 10 or dendrite growth within the battery cell 30. A Bridgberg cavity can be used to more sensitively detect the pressure within the battery cell 30.

[0115] Optionally, the integrated circuit device 34 can be integrated with one of a temperature sensor, a pressure sensor, a current sensor, a gas component detection sensor, a Bragg grating, and a Fabry-Perot resonant cavity, or multiple detection elements can be integrated in the same integrated circuit device 34, so that the integrated circuit device 34 has multiple detection functions, which can be set according to specific conditions.

[0116] Therefore, the detection elements including a temperature sensor, a pressure sensor, a current sensor, a gas component detection sensor, a Bragg grating, or a Fabry-Perot resonant cavity are arranged, which is beneficial to the integrated circuit device 34 to obtain the working condition of the battery monomer 30 more timely and accurately.

[0117] In some embodiments, the at least one integrated circuit device 34 includes a wireless communication unit for wireless communication with the outside of the battery monomer 30.

[0118] Specifically, the working condition of the battery monomer 30 detected by the detection unit can be transmitted to a control unit outside the battery monomer 30 through the wireless communication unit, so as to determine whether to make or not make a corresponding response to the battery monomer 30. In this way, the circuit connection structure of the battery monomer 30 can be simplified, and the complexity of the circuit arrangement inside or outside the battery 10 can be simplified.

[0119] As shown in Figure 5 and Figure 6 respectively show the structure schematic diagram of the integrated circuit device 34 provided by the embodiments of the present application arranged in the tab 322 and the electrode body 321 of the battery monomer.

[0120] As shown in Figure 5 and Figure 6 , in some embodiments, the battery monomer 30 further includes an electrode assembly 32 accommodated in the accommodation cavity 31a, and the electrode assembly 32 includes an electrode body 321 and a tab 322 led out from the end of the electrode body 321. The at least one integrated circuit device 34 is arranged in the tab 322, and / or the at least one integrated circuit device 34 is arranged in the electrode body 321.

[0121] Optionally, the integrated circuit device 34 can be arranged only on the tab 322, or only on the electrode body 321, or both on the tab 322 and on the electrode body 321.

[0122] Optionally, the integrated circuit device 34 can be arranged on the surface of the tab 322, or arranged in the interior of the tab 322. Similarly, the integrated circuit device 34 can be arranged on the surface of the electrode body 321, or arranged in the interior of the electrode body 321.

[0123] In the embodiment where the integrated circuit device 34 is provided on the tab 322 , the detection element in the integrated circuit device 34 can be used to detect information such as the current or temperature of the tab 322 to determine the overcurrent capacity or heating condition of the tab 322 .

[0124] In an embodiment where the integrated circuit device 34 is arranged on the electrode body 321, the detection element of the integrated circuit device 34 can be used to detect the stress inside or on the surface of the electrode body 321 to facilitate judging the expansion of the electrode body 321; or the detection element in the integrated circuit device 34 can be used to detect information such as the temperature of the electrode body 321.

[0125] like Figure 7 and Figure 8 As shown, in some embodiments, the electrode body 321 includes two first surfaces 321a arranged opposite each other along a first direction X and two second surfaces 321b arranged opposite each other along a second direction Y. The two first surfaces 321a connect the two second surfaces 321b. The tab 322 extends from the end of the electrode body 321 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first surface 321a is arranged in an arc shape, and at least one integrated circuit device 34 is disposed on the first surface 321a.

[0126] Thus, the electrode assembly 32 can be a square wound electrode assembly. Since there is more space between the arc-shaped first surface 321a and the housing 31, the integrated circuit device 34 can be arranged in this space. Therefore, at least one integrated circuit device 34 is arranged on the first surface 321a.

[0127] like Figure 4 and Figure 7 As shown, in some embodiments, the battery cell 30 further includes a current collector 35, which is electrically connected to the tab 322. The surface of the tab 322 facing the housing 31 has a first connection area and a second connection area. The first connection area is connected to the current collector 35, and at least one integrated circuit device 34 is disposed in the second connection area and is spaced apart from the current collector 35.

[0128] Alternatively, the integrated circuit device 34 may be connected to the surface of the second connection region by clamping, bonding, or heat-fusion, or may be embedded in the interior of the second connection region.

[0129] Such a setting facilitates the connection between the integrated circuit device 34 and the electrode ear 322, and spacing the integrated circuit device 34 and the current collector 35 is beneficial to reducing the risk of electrical connection between the integrated circuit device 34 and the current collector 35, thereby reducing the possibility of affecting the normal operation of the integrated circuit device 34 or the current collector 35.

[0130] In some embodiments, the battery cell 30 further includes an electrode assembly 32 and an insulating member 36. The insulating member 36 and the electrode assembly 32 are located within the accommodating cavity 31a, and the insulating member 36 is disposed between the outer shell 31 and the peripheral surface of the electrode assembly 32. At least one integrated circuit device 34 is disposed on the insulating member 36.

[0131] Specifically, the insulating member 36 may be coated on the peripheral surface of the electrode assembly 32 to achieve insulation between the electrode assembly 32 and the housing 31 .

[0132] Optionally, at least one integrated circuit device 34 can be arranged on the surface of the insulating part 36 close to the electrode assembly 32, or can be arranged on the surface of the insulating part 36 close to the shell 31, or the integrated circuit device 34 can be embedded in the interior of the insulating part 36.

[0133] In this embodiment, the detection element in the integrated circuit device 34 may include a stress sensor, etc., for detecting the stress of the insulating member 36 to understand the damage of the insulating member 36 in real time.

[0134] like Figure 9 and Figure 10 Schematic diagrams of the structure in which the integrated circuit device 34 is arranged on the first wall 313 in the battery cell provided by the embodiments of the present application are respectively shown.

[0135] like Figure 9 and Figure 10 As shown, in some embodiments, the housing 31 includes a first wall 313 , and at least one integrated circuit device 34 is disposed on the first wall 313 .

[0136] Optionally, the first wall 313 may be a part of the end cover 312 , or the first wall 313 may be a part of the housing 311 .

[0137] Optionally, the integrated circuit device 34 may be disposed on a side of the first wall 313 close to the accommodating cavity 31a, or on a side of the first wall 313 facing away from the accommodating cavity 31a, that is, outside the first wall 313. Alternatively, at least a portion of the integrated circuit device 34 may be embedded inside the first wall 313. This arrangement may be made according to specific needs.

[0138] With this configuration, the temperature of the first wall 313 of the battery cell 30 and other information can be obtained in real time, so as to determine the working condition of the battery cell 30 according to the temperature information of the first wall 313 .

[0139] In some embodiments, the integrated circuit device 34 is connected to the first wall 313 by adhesive bonding, snap bonding, or heat fusion bonding.

[0140] Specifically, the integrated circuit device 34 can be bonded to the first wall 313 using adhesive, or the integrated circuit device 34 and the first wall 313 can be provided with a matching concave-convex structure to achieve a snap connection between the two. Alternatively, a molten hot melt component can be placed between the first wall 313 and the integrated circuit device 34. After the hot melt component cools and solidifies, the first wall 313 and the integrated circuit device 34 can be connected.

[0141] With this arrangement, the connection between the integrated circuit device 34 and the first wall 313 is simple and reliable.

[0142] like Figures 11 to 13 As shown, in some embodiments, the first wall 313 has a groove 313 a , and at least one integrated circuit device 34 is disposed in the groove 313 a .

[0143] Optionally, according to the requirements of the location of the integrated circuit device 34 , the groove 313 a may be arranged to face the accommodation cavity 31 a , or the groove 313 a may be arranged to face the outside of the battery cell 30 .

[0144] It can be understood that providing the first wall 313 with a groove 313a and arranging the integrated circuit device 34 in the groove 313a is beneficial to reducing the space occupied by the integrated circuit device 34 inside or outside the battery cell 30, improving the energy density of the battery cell 30, or facilitating the grouping of the battery cells 30.

[0145] Optionally, after the integrated circuit device 34 is disposed in the groove 313a, it can be disposed so as to protrude from the groove 313a, or be completely accommodated in the groove 313a. This can be configured according to specific needs and is not limited here.

[0146] In some embodiments, the depth of the groove 313 a is h1 , the thickness of the integrated circuit device 34 is h2 , and h1 ≥ h2 .

[0147] That is, the depth of the groove 313 a is greater than or equal to the thickness of the integrated circuit device 34 , or the depth of the groove 313 a is equal to the thickness of the integrated circuit device 34 .

[0148] In this way, the integrated circuit device 34 is completely located in the groove 313a, which not only reduces the additional space occupied by the integrated circuit device 34 and improves the energy density of the battery cell 30, but also reduces the risk of the integrated circuit device 34 falling off the first wall 313 due to impact or scratches.

[0149] like Figure 14 As shown, in some embodiments, the first wall 313 has a boss 313 b , and at least one integrated circuit device 34 is disposed on the boss 313 b .

[0150] Optionally, the boss 313b can be set to protrude toward one side of the accommodating cavity 31a, in which case the integrated circuit device 34 can be set on the side of the boss 313b facing the accommodating cavity 31a; or, the boss 313b can be set toward the outside of the battery cell 30, in which case the integrated circuit device 34 is set outside the battery cell 30.

[0151] Providing the first wall 313 with a boss 313 b and disposing the integrated circuit device 34 on the boss 313 b is beneficial for improving the connection strength and connection stability between the integrated circuit device 34 and the first wall 313 .

[0152] like Figure 15 As shown, in some embodiments, the housing 31 includes a first wall 313 , the battery cell 30 further includes a support member 37 , the at least one integrated circuit device 34 is connected to the support member 37 , and the support member 37 is connected to the first wall 313 .

[0153] Optionally, the first wall 313 may be a part of the shell 311 or a part of the end cover 312 , or a part of the shell 311 and a part of the end cover 312 may both have the first wall 313 .

[0154] In this way, the integrated circuit section can be first connected to the support member 37, and then the support member 37 can be connected to the first wall 313, so that the integrated circuit device 34 is connected to the first wall 313 through the support member 37. This can simplify the assembly process of the battery cell 30, thereby improving the production efficiency of the battery cell 30 and helping to improve the connection stability of the integrated circuit device 34.

[0155] Optionally, the support member 37 can be connected to the first wall 313 by snap connection, bonding, thread connection, riveting or pin connection. The connection can be selected according to actual needs and is not limited here.

[0156] In some embodiments, the support member 37 is connected to the first wall 313 by heat melting, adhesive bonding or snapping.

[0157] The support member 37 is connected to the first wall 313 through the above-mentioned connection method, which has a simple connection method and high connection reliability.

[0158] In some embodiments, the at least one integrated circuit device 34 is connected to the support member 37 by adhesive bonding, snap bonding, or heat-fusion bonding.

[0159] For example, a slot matching the shape of the integrated circuit device 34 can be provided on the support member 37, and the integrated circuit device 34 can be snapped into the slot, or the integrated circuit device 34 can be bonded or hot-melted into the slot.

[0160] In this way, the connection between the integrated circuit device 34 and the support member 37 is facilitated.

[0161] like Figure 16 As shown, in some embodiments, the first wall 313 includes a main body portion 3131 and an insulating portion 3132. The insulating portion 3132 is disposed on a side of the main body portion 3131 adjacent to the accommodating cavity 31a. The insulating portion 3132 has a protrusion 3132a extending toward the accommodating cavity 31a. At least one integrated circuit device 34 is disposed on the insulating portion 3132. The integrated circuit device 34 is disposed juxtaposed with the protrusion 3132a along a thickness direction O perpendicular to the first wall 313.

[0162] The insulating portion 3132 is provided on a side of the main body 3131 close to the accommodating cavity 31 a . The insulating portion 3132 is located between the main body 3131 and the electrode assembly 32 to achieve insulation between the main body 3131 and the electrode assembly 32 .

[0163] Optionally, the protrusion 3132 a may abut against the electrode assembly 32 to fix the electrode assembly 32 and reduce the risk of the electrode assembly 32 shaking inside the battery cell 30 .

[0164] In the embodiment where the first wall 313 is the end cap 312 , the first wall 313 is further provided with an electrode terminal 33 . In this case, the integrated circuit device 34 can also be provided in parallel with the electrode terminal 33 .

[0165] It can be understood that arranging the integrated circuit device 34 and the protrusion 3132a in parallel along the thickness direction O perpendicular to the first wall 313 is beneficial to saving space inside the battery cell 30 and reducing the extrusion force between the integrated circuit device 34 and the electrode assembly 32, thereby reducing the risk of the integrated circuit device 34 damaging the surface of the electrode assembly 32.

[0166] In some embodiments, along the thickness direction O, the maximum dimension of the integrated circuit device 34 is smaller than the dimension of the protrusion 3132 a .

[0167] In this way, when the protrusion 3132a presses against the electrode assembly 32, a certain gap still exists between the integrated circuit device 34 and the electrode assembly 32, thereby reducing the additional space occupied by the integrated circuit device 34 in the battery cell 30 and reducing the risk of interference between the integrated circuit device 34 and the electrode assembly 32.

[0168] like Figure 4 、 Figure 16 Hehe Figure 17 In some embodiments, the battery cell 30 further includes an electrode terminal 33, which is disposed through the body portion 3131 and the insulating portion 3132. The integrated circuit device 34 is spaced apart from the electrode terminal 33 along a thickness direction O perpendicular to the first wall 313.

[0169] The electrode terminal 33 is arranged through the body part 3131 and the insulating part 3132 to realize electrical connection with the current collector 35 and the tab 322. The integrated circuit device 34 is arranged to be spaced from the electrode terminal 33, reducing the risk of interference between the integrated circuit device 34 and the electrode terminal 33 and reducing the risk of electrical connection between the two affecting the normal operation of the battery monomer 30.

[0170] In some embodiments, the at least one integrated circuit device 34 is arranged on the side of the first wall 313 facing the accommodation cavity 31a. The battery monomer 30 includes a plurality of electrode assemblies 32, each electrode assembly 32 having two first surfaces 321a arranged opposite to each other along a first direction X and two second surfaces 321b arranged opposite to each other along a second direction Y, the two first surfaces 321a connecting the two second surfaces 321b, the first surfaces 321a being arc-shaped, and the first direction X being perpendicular to the second direction Y. The at least one integrated circuit device 34 is located between two first surfaces 321a adjacent along the second direction Y.

[0171] The integrated circuit device 34 is arranged between two first surfaces 321a adjacent along the second direction Y, i.e., in the space enclosed by the arc-shaped surfaces of the two adjacent electrode assemblies 32 and the first wall 313 of the battery monomer 30 to accommodate the integrated circuit device 34. In this way, it is beneficial to reasonably utilize the space inside the battery monomer 30, reducing the additional internal space of the battery monomer 30 due to the arrangement of the integrated circuit device 34, and improving the energy density of the battery monomer 30.

[0172] In some embodiments, the battery monomer 30 further includes the first wall 313 and the electrode terminal 33 arranged on the first wall 313 and used for transmitting electric energy. The at least one integrated circuit device 34 is arranged on a part of the end surface of the electrode terminal 33 located outside the accommodation cavity 31a.

[0173] In this way, the integrated circuit device 34 can be used to detect the temperature of the electrode terminal 33 or the current flowing through the electrode terminal 33, etc., to realize real-time understanding of the working condition of the electrode terminal 33.

[0174] The integrated circuit device 34 is arranged on a part of the end surface of the battery 10 terminal located outside the accommodation cavity 31a, and another part of the end surface of the electrode terminal 33 can be used to connect with the current collector 40 in the battery 10 to realize series connection or parallel connection of adjacent battery monomers 30.

[0175] Specifically, the electrode terminal 33 can be connected with the current collector 35 inside the battery monomer 30 to be connected with the tab 322 through the current collector 35; or the electrode terminal 33 can also be connected with the lithium supplement member inside the battery monomer 30 to provide electric energy to the lithium supplement member so that the lithium supplement member timely releases lithium ions or lithium element.

[0176] Optionally, the integrated circuit device 34 may be directly connected to the electrode terminal 33 , or the integrated circuit device 34 may be connected to the electrode terminal 33 via an intermediate connector, which can be selected according to actual needs.

[0177] In some embodiments, the integrated circuit device 34 is connected to the electrode terminal 33 by adhesive bonding or welding.

[0178] In this way, the connection between the integrated circuit and the electrode terminal 33 is simple and has good connection stability.

[0179] like Figure 18 and Figure 19 As shown, in some embodiments, the housing 31 includes a first wall 313, and the battery cell 30 further includes a support member 38, an insulating member 39, and an electrode terminal 33. The electrode terminal 33 is used to transmit electrical energy, and the insulating member 39 is used to insulate the electrode terminal 33 from the first wall 313. The support member 38 is connected to the insulating member 39, and at least one integrated circuit device 34 is disposed on the support member 38.

[0180] Specifically, the electrode terminal 33 is provided through the first wall 313 for connecting to the current collecting member 35 or the lithium replenishing member inside the battery cell 30 .

[0181] At least a portion of the insulating member 39 is disposed between the electrode terminal 33 and the first wall 313 to provide insulation between the electrode terminal 33 and the first wall 313. It will be appreciated that the integrated circuit device 34 is connected to the insulating member 39 via the support member 38. During assembly of the battery cell 30, the integrated circuit device 34 can be wire-connected to the support member 38, which can then be connected to the insulating member 39.

[0182] In some embodiments, if one electrode terminal 33 is provided on the first wall 313, an insulating member 39 is required to be provided between the first wall 313 and the electrode terminal 33, and the support member 38 can be connected to one insulating member 39. In other embodiments, if multiple electrode terminals 33 are provided on the first wall 313, two insulating members 39 are required to be provided between the first wall 313 and the two electrode terminals 33, respectively. In this case, the support member 38 can be connected to one of the insulating members 39, or the support member 38 can be connected to both insulating members 39.

[0183] Such a configuration simplifies the assembly process of the battery cell 30 . At the same time, since the integrated circuit device 34 and the support member 38 , and the support member 38 and the insulating member 39 have better connection stability, it is beneficial to improve the connection stability of the integrated circuit device 34 and reduce the risk of the integrated circuit device 34 falling off.

[0184] The battery 10 provided according to an embodiment of the present application includes the battery cell 30 provided in any of the above embodiments.

[0185] The battery 10 provided in the embodiment of the present application has the same technical effects as the battery cell 30 provided in any of the above embodiments, and thus will not be described in detail here.

[0186] like Figure 3 、 Figure 4 、 Figure 20 and Figure 21 As shown, in some embodiments, the battery 10 also includes a busbar 40 and a wiring harness isolator 50. The busbar 40 is used to electrically connect two adjacent battery cells 30. The busbar 40 is connected to the wiring harness isolator 50. At least one integrated circuit device 34 is arranged on the side of the wiring harness isolator 50 facing the battery cell 30.

[0187] Specifically, the busbar 40 can connect the electrode terminals 33 of two adjacent battery cells 30 to achieve series or parallel connection of the two adjacent battery cells 30. The busbar 40 and the electrode terminals 33 can be locked together using studs, which are then connected to the wiring harness isolator 50 to limit the studs. The wiring harness isolator 50 can be made of plastic.

[0188] The integrated circuit device 34 is mounted on the wiring harness isolator 50 on the side of the wiring harness isolator 50 facing the battery cell 30. The space between the wiring harness isolator 50 and the battery cell 30 is utilized to house the integrated circuit device 34, reducing the extra space occupied by the integrated circuit device 34. Furthermore, the integrated circuit device 34 can be configured to detect changes in pressure, temperature, and other factors, providing real-time information on the operating status of the corresponding battery cell 30.

[0189] The battery 10 provided according to an embodiment of the present application includes the battery 10 provided by any of the above embodiments, and the battery 10 is used to provide electrical energy.

[0190] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0191] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell, characterized in that: include: a housing having a receiving cavity; at least one integrated circuit device, the integrated circuit device including a detection element, the detection element being used to detect the working condition of the battery cell, the integrated circuit device being disposed in the accommodating cavity or outside the accommodating cavity; The battery cell also includes an electrode assembly accommodated in the accommodating cavity, the electrode assembly includes an electrode body and a tab extending from the end of the electrode body, at least one integrated circuit device is arranged on the tab, and / or at least one integrated circuit device is arranged on the electrode body.

2. The battery cell according to claim 1, wherein: The integrated circuit device is in the shape of a plate, a sheet or a block.

3. The battery cell according to claim 1, wherein: The detection element includes a temperature sensor, a pressure sensor, a stress sensor, a current sensor, a gas component detection sensor, a Bragg grating or a Fabry-Perot resonant cavity.

4. The battery cell according to claim 1, wherein: At least one of the integrated circuit devices further includes a wireless communication unit configured to perform wireless communication with an external portion of the battery cell.

5. The battery cell according to claim 1, characterized in that The electrode body includes two first surfaces arranged opposite to each other along a first direction and two second surfaces arranged opposite to each other along a second direction, and the two first surfaces are connected to the two second surfaces; the first surface is arranged in an arc shape, and the electrode ear is led out from the end of the electrode body along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; at least one integrated circuit device is arranged on the first surface.

6. The battery cell according to claim 1 or 5, characterized in that: The battery cell further includes a current collector, wherein the current collector is electrically connected to the tab; The surface of the tab facing the housing has a first connection area and a second connection area, the first connection area is connected to the current collector, and at least one integrated circuit device is arranged in the second connection area and spaced apart from the current collector.

7. The battery cell according to claim 1, characterized in that The battery cell further includes an electrode assembly and an insulating member, wherein the insulating member and the electrode assembly are located in the accommodating cavity, and the insulating member is disposed between the outer shell and the peripheral side surface of the electrode assembly; at least one integrated circuit device is disposed on the insulating member.

8. The battery cell according to claim 1, wherein: The housing includes a first wall, and at least one integrated circuit device is disposed on the first wall.

9. The battery cell according to claim 8, characterized in that The integrated circuit device is connected to the first wall by adhesive bonding, snap bonding or thermal melting.

10. The battery cell according to claim 8 or 9, characterized in that: The first wall has a groove, and at least one integrated circuit device is arranged in the groove.

11. The battery cell according to claim 10, characterized in that The depth of the groove is h1, the thickness of the integrated circuit device is h2, and h1≥h2.

12. The battery cell according to claim 8, characterized in that The first wall has a boss, and at least one integrated circuit device is disposed on the boss.

13. The battery cell according to claim 1, characterized in that The housing includes a first wall, the battery cell further includes a support member, at least one integrated circuit device is connected to the support member, and the support member is connected to the first wall.

14. The battery cell according to claim 13, characterized in that The support member is connected to the first wall by heat melting, bonding or clamping.

15. The battery cell according to claim 13 or 14, characterized in that: At least one of the integrated circuit devices is connected to the support member by adhesive bonding, snap bonding or thermal melting.

16. The battery cell according to claim 8, characterized in that The first wall includes a main body portion and an insulating portion, wherein the insulating portion is provided on a side of the main body portion close to the accommodating cavity; the insulating portion has a protrusion protruding toward the accommodating cavity, and at least one integrated circuit device is provided on the insulating portion; The integrated circuit device and the protrusion are arranged in parallel along a thickness direction perpendicular to the first wall.

17. The battery cell according to claim 16, characterized in that Along the thickness direction, the maximum dimension of the integrated circuit device is smaller than the dimension of the protrusion.

18. The battery cell according to claim 16 or 17, characterized in that: The battery cell further includes an electrode terminal, which is provided through the main body and the insulating portion; along a thickness direction perpendicular to the first wall, the integrated circuit device is spaced apart from the electrode terminal.

19. The battery cell according to claim 8, characterized in that At least one integrated circuit device is disposed on a side of the first wall facing the accommodating cavity; The battery cell includes a plurality of electrode assemblies, each of the electrode assemblies having two first surfaces disposed opposite to each other along a first direction and two second surfaces disposed opposite to each other along a second direction, wherein the two first surfaces connect the two second surfaces; the first surfaces are arc-shaped, the first direction is perpendicular to the second direction, and the first direction is parallel to the thickness direction of the first wall; At least one of the integrated circuit devices is located between two adjacent first surfaces along the second direction.

20. The battery cell according to claim 1, characterized in that The battery cell further includes a first wall and an electrode terminal, wherein the electrode terminal is provided on the first wall and is used for transmitting electric energy; at least one integrated circuit device is connected to a portion of an end surface of the electrode terminal located outside the accommodating cavity.

21. The battery cell according to claim 20, characterized in that The integrated circuit device is connected to the electrode terminal by adhesive bonding or welding.

22. The battery cell according to claim 1, characterized in that The housing includes a first wall, and the battery cell further includes a support, an insulating member, and an electrode terminal, wherein the electrode terminal is used to transmit electrical energy, and the insulating member is used to insulate the electrode terminal from the first wall; The support member is connected to the insulating component, and at least one integrated circuit device is provided on the support member.

23. A battery, characterized in that: The battery cell comprises the battery cell according to any one of claims 1 to 22.

24. The battery according to claim 23, characterized in that The battery also includes: A busbar, used for electrically connecting two adjacent battery cells; A wiring harness isolator is provided, the busbar is connected to the wiring harness isolator, and at least one integrated circuit device is provided on a side of the wiring harness isolator facing the battery cell.

25. An electrical device, characterized in that: Comprising a battery as claimed in claim 23 or 24, the battery is used to provide electrical energy.

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