Battery cells, batteries and power consuming devices

Abstract

The present application provides a battery cell, a battery, and a power consumption device, the battery cell including a housing having a receiving chamber, and a detection element for detecting the operating status of the battery cell, the detection element including at least one integrated circuit device disposed inside or outside the receiving chamber. The battery cell according to the embodiment of the present application can grasp the operating status inside the battery cell in real time through the detection element, which facilitates the control element inside or outside the battery cell to perform or not perform the corresponding reaction operation, and reduces the possibility of the safety risk existing in the battery cell being further deteriorated, which is advantageous to improving the safety performance of the battery cell.

Description

[Technical Field]

[0001] This application relates to the field of battery technology, and more particularly to battery cells, batteries, and power consuming devices. [Background technology]

[0002] Batteries are widely used in electronic devices, such as mobile phones, laptops, battery-powered vehicles, electric cars, electric airplanes, electric steamships, electric toy cars, electric toy boats, electric toy airplanes, and power tools. Battery cells can include cadmium-nickel 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 operating conditions of battery cells during their operation, take corresponding responses in a timely manner, and improve the safety performance of battery cells is a technical issue that needs continuous improvement in battery cell technology. Summary of the Invention

[0004] The present application provides a battery cell, a battery, and a power consumption device that can improve the safety performance of the battery cell.

[0005] In a first aspect, an embodiment of the present application provides a battery cell including a housing having a chamber, and at least one integrated circuit device including a detection element for detecting an operating condition of the battery cell, the integrated circuit device being provided within the chamber or outside the chamber.

[0006] According to the battery cell of the embodiment of the present application, an integrated circuit device is provided, and the integrated circuit device is configured to include a detection element, so that the detection element can grasp the operating status inside the battery cell in real time, which makes it easy for the control element inside or outside the battery cell to perform or not perform the corresponding reaction operation, reduces the possibility of further worsening the safety risks existing in the battery cell, and is thereby advantageous to improving the safety performance of the battery cell.

[0007] In some embodiments, the integrated circuit device is plate-shaped, sheet-shaped, or block-shaped. Depending on the installation position of the integrated circuit device, an appropriate shape can be selected to match the internal spatial layout of the battery cell, thereby minimizing the internal space of the battery cell that is added by installing the integrated circuit device. This is advantageous for real-time detection of the operating status of the battery cell and 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 component detection sensor, a Bragg grating, or a Fabry-Perot resonator, which is advantageous for the integrated circuit device to obtain the operating status of the battery cell in a more timely and accurate manner.

[0009] In some embodiments, the at least one integrated circuit device further includes a wireless communication unit for wirelessly communicating with the outside of the battery cell, thereby simplifying the circuit connection structure of the battery cell and reducing the complexity of the circuit arrangement inside or outside the battery.

[0010] In some embodiments, the battery cell further includes an electrode assembly housed in the housing and including an electrode body and a tab drawn from an end of the electrode body, and at least one integrated circuit device is provided on the tab and / or the electrode body, such that a detection element in the integrated circuit device can detect information such as a current or temperature of the tab, making it easy to determine the overcurrent capability or heat generation status of the tab, or the detection element in the integrated circuit device can detect stress inside or on the surface of the electrode body, making it easy to determine the expansion status of the electrode body, or the detection element in the integrated circuit device can detect information such as the temperature of the electrode body.

[0011] In some embodiments, the electrode body includes two first surfaces facing each other along a first direction and two second surfaces facing each other along a second direction, the two first surfaces connect the two second surfaces, the first surfaces are arcuate, the tabs extend from an end of the electrode body along a third direction, the first direction, the second direction, and the third direction are perpendicular to each other, and the at least one integrated circuit device is provided on the first surface, which is advantageous for saving internal space in the battery cell and improving 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 having a first connection region and a second connection region on a surface facing the housing, the first connection region being connected to the current collector, and the at least one integrated circuit device being provided at the second connection region and spaced apart from the current collector. In this way, the connection between the integrated circuit device and the tab can be easily achieved, and the space between the integrated circuit device and the current collector is advantageous in reducing the risk of electrical connection between the integrated circuit device and the current collector, and further 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 insulator, the insulator and the electrode assembly are positioned in the chamber, the insulator is provided between the housing and a peripheral surface of the electrode assembly, and the at least one integrated circuit device is provided in the insulator. The detection element in the integrated circuit device includes a stress sensor or the like for detecting stress in the insulator, and damage to the insulator can be determined in real time.

[0014] In some embodiments, the housing includes a first wall on which at least one integrated circuit device is provided, and thus, information such as the temperature of the first wall of the battery cell can be obtained in real time, and the operating status of the battery cell can be determined according to the temperature information of the first wall.

[0015] In some embodiments, the integrated circuit device is adhesively connected, glued or hot-melt connected to the first wall, which provides a simple connection between the integrated circuit device and the first wall and high connection reliability.

[0016] In some embodiments, the first wall has a recessed groove in which at least one integrated circuit device is provided, which is advantageous for reducing the integrated circuit device's space occupancy inside or outside the battery cell, improving the energy density of the battery cell, or facilitating grouping of the 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, so that the integrated circuit device is completely positioned within the groove, reducing the space occupied by the integrated circuit device and improving the energy density of the battery cell, while also reducing the risk of the integrated circuit device being impacted or caught and falling off the first wall.

[0018] In some embodiments, the first wall has a boss on which at least one integrated circuit device is mounted, which is advantageous for improving the strength and stability of the connection 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 component, and the at least one integrated circuit device is connected to the support component, which is connected to the first wall. This simplifies the assembly process of the battery cell and further improves production efficiency of the battery cell. It is also advantageous in improving connection stability of the integrated circuit device.

[0020] In some embodiments, the support part is connected to the first wall by hot melt connection, adhesive connection or fastening connection, which provides a simple connection method and high connection reliability.

[0021] In some embodiments, the at least one integrated circuit device is adhesively, glue-on, or hot-melt-connected to the support component, which facilitates connection between the integrated circuit device and the support component.

[0022] In some embodiments, the first wall includes a main body and an insulating portion provided on a side of the main body that is closer to the accommodating chamber, the insulating portion having a protrusion that protrudes toward the accommodating chamber, and the at least one integrated circuit device is provided on the insulating portion, and the integrated circuit device is provided alongside the protrusion along a thickness direction perpendicular to the first wall, which is advantageous in saving space inside the battery cell, reducing the pushing force between the integrated circuit device and the electrode assembly, and further reducing the risk that the integrated circuit device will scratch the surface of the electrode assembly.

[0023] In some embodiments, the maximum size of the integrated circuit device along the thickness direction is smaller than the size of the protrusion, so that when the protrusion abuts against the electrode assembly, there is still a certain gap between the integrated circuit device and the electrode assembly, reducing the integrated circuit device from occupying extra space in the battery cell and reducing the risk of interference between the integrated circuit device and the electrode assembly.

[0024] In some embodiments, the battery cell further includes electrode terminals formed in the main body and the insulating part, and the integrated circuit device is disposed at a distance from the electrode terminals along a thickness direction perpendicular to the first wall, thereby reducing the risk of interference between the integrated circuit device and the electrode terminals and the risk of electrical connection between them affecting normal operation of the battery cell.

[0025] In some embodiments, the at least one integrated circuit device is provided on a side of the first wall facing the storage chamber, and the battery cell includes a plurality of electrode assemblies having two first surfaces opposite each other along a first direction and two second surfaces opposite each other along a second direction, the two first surfaces being connected to the two second surfaces, the first surfaces being arc-shaped, the first direction being perpendicular to the second direction and parallel to the thickness direction of the first wall, and the at least one integrated circuit device being located between two first surfaces adjacent to each other along the second direction. This allows the integrated circuit device to be accommodated in a space formed by the first wall and the arc-shaped surfaces of the two adjacent electrode assemblies of the battery cell, which is advantageous for rationally utilizing the internal space of the battery cell and reducing the internal space of the battery cell that would otherwise be increased by the provision of the integrated circuit device, thereby improving the energy density of the battery cell.

[0026] In some embodiments, the battery cell further includes a first wall and an electrode terminal provided on the first wall for transmitting power, and the at least one integrated circuit device is connected to a part of an end face of the electrode terminal located outside the accommodating chamber, whereby the integrated circuit device can detect information such as the temperature of the electrode terminal or the current flowing through the electrode terminal, thereby enabling to grasp the operating status of the electrode terminal in real time.

[0027] In some embodiments, the integrated circuit device is connected to the electrode terminals by adhesive or welding, which makes the connection between the integrated circuit and the electrode terminals simple and provides good connection stability.

[0028] In some embodiments, the housing includes a first wall, and the battery cell further includes a support part, an insulating member, and an electrode terminal, the electrode terminal is used to transmit power, the insulating member is provided to insulate the electrode terminal from the first wall, the support part is connected to the insulating member, and the at least one integrated circuit device is provided on the support part. In this way, the assembly process of the battery cell is simplified, and at the same time, there is better connection stability between the integrated circuit device and the support part, and between the support part and the insulating member, which is advantageous in improving the connection stability of the integrated circuit device and reducing the risk of the integrated circuit device falling off.

[0029] In a second aspect, embodiments of the present application provide a battery including a battery cell according to any embodiment of the first aspect.

[0030] The battery according to the embodiment of the present application uses the battery cell according to any of the above embodiments, and therefore has the same technical effects, and therefore a description thereof will be omitted here.

[0031] In some embodiments, the battery further includes a bus component for electrically connecting two adjacent battery cells and a harness spacer, the bus component being connected to the harness spacer, and at least one integrated circuit device being provided on the side of the harness spacer facing the battery cells. The integrated circuit device is provided in the space between the harness spacer and the battery cells, thereby reducing the extra space occupied by the integrated circuit device. Furthermore, an integrated circuit device is provided for detecting changes in pressure, temperature, etc., so that the operating status of the corresponding battery cell can be determined in real time.

[0032] In a third aspect, embodiments of the present application provide a power consuming device including a battery as an embodiment of the second aspect above for providing power thereto.

[0033] The power consumption device according to the embodiment of the present application uses the battery according to the embodiment of the present application, and therefore has the same technical effects, and therefore a description thereof will be omitted here. [Brief explanation of the drawings]

[0034] In order to more clearly describe the technical solutions of the embodiments of the present application, the following provides a brief description of the drawings required for the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without any creative effort.

[0035] [Figure 1] 1 is a schematic diagram illustrating the configuration of a vehicle according to an embodiment of the present invention. [Figure 2] FIG. 1 is an exploded schematic view of a battery according to an embodiment of the present application. [Figure 3] 1 is a schematic diagram illustrating the configuration of a battery module in a battery according to an embodiment of the present application. [Figure 4] FIG. 1 is an exploded schematic view of a battery cell according to some embodiments of the present application. [Figure 5] 1 is a schematic diagram illustrating the configuration of a battery cell according to an embodiment of the present application, with a portion of the structure thereof omitted. [Figure 6] FIG. 10 is a schematic diagram of another battery cell according to an embodiment of the present application, with a partial structure omitted. [Figure 7] FIG. 10 is a schematic diagram illustrating the configuration of another battery cell according to an embodiment of the present application, with a portion of the structure thereof omitted. [Figure 8] FIG. 4 is a schematic diagram illustrating the configuration of yet another battery cell according to an embodiment of the present application, with a portion of the structure thereof omitted. [Figure 9] 1 is a schematic diagram of a connection configuration between a housing and an integrated circuit device in a battery cell according to an embodiment of the present application. [Figure 10] 1 is a schematic diagram illustrating the configuration of a battery cell according to an embodiment of the present invention. [Figure 11] FIG. 10 is a schematic diagram illustrating a further battery cell according to an embodiment of the present application, with a portion of the structure thereof omitted. [Figure 12] FIG. 1 is a front view of a battery cell according to an embodiment of the present application. [Figure 13] FIG. 13 is a schematic cross-sectional view taken along the line A-A in FIG. [Figure 14] FIG. 2 is a schematic diagram illustrating the configuration of another battery cell according to an embodiment of the present application. [Figure 15]1 is a schematic diagram illustrating the configuration of a first wall, a support component, and an integrated circuit device in a battery cell according to an embodiment of the present application. [Figure 16] 3 is a schematic diagram of a connection configuration between a first wall and an integrated circuit device in a battery cell according to an embodiment of the present application. FIG. [Figure 17] FIG. 2 is a schematic diagram of a connection configuration between an integrated circuit device and an electrode terminal in a battery cell according to an embodiment of the present application. [Figure 18] FIG. 1 is a schematic diagram illustrating a configuration in which an integrated circuit device in a battery cell according to an embodiment of the present application is connected to an insulating member by a support component. [Figure 19] FIG. 19 is a schematic diagram of an exploded configuration of FIG. 18. [Figure 20] 1 is a schematic diagram illustrating the configuration of a battery according to an embodiment of the present application, with a portion of the structure thereof omitted. [Figure 21] 21 is a schematic cross-sectional view taken along the direction BB in FIG. 20. FIG.

[0036] In the drawings, the drawings are not drawn to scale.

[0037] Symbols:

[0038] 1 vehicle, 1a motor, 1b control device,

[0039] 10 battery, 11 first housing part, 12 second housing part,

[0040] 20 battery modules,

[0041] 30 battery cell, 31 housing, 31a storage chamber, 311 case, 311a opening, 312 end cap, 313 first wall, 313a groove, 313b boss, 3131 main body, 3132 insulating portion, 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 insulator, 37 support part, 38 support part, 39 insulating member,

[0042] 40 bus parts,

[0043] 50 harness spacer,

[0044] X: first direction, Y: second direction, Z: third direction, O: thickness direction DETAILED DESCRIPTION OF THE INVENTION

[0045] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly describe the technical solutions in the embodiments of the present application in combination with the drawings of the embodiments of the present application, and of course, the described embodiments are only some of the embodiments of the present application, not all of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative work are also within the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used herein are used only for the purpose of describing specific embodiments and are not intended to limit the present application. The terms "comprises" and "includes," as well as any variations thereof, in the specification and claims of this application and the above description of the drawings are intended to cover a non-exclusive inclusion. The terms "first," "second," etc., in the specification and claims of this application and the above drawings should not be understood as implying a particular order or subordinate relationship, but are intended to distinguish different objects.

[0047] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in the embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various places throughout the specification do not necessarily refer to the same embodiment, nor are they intended to be exclusive or separate from other embodiments or alternative embodiments.

[0048] In describing the embodiments of the present application, unless otherwise clearly specified or limited, the technical terms "attach," "couple," "connect," "fixed," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral unit, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application depending on the context.

[0049] In the description of the embodiments of this application, the term "and / or" only describes the relationship between related objects and indicates that there are three types of relationships. For example, C and / or D can represent the following: A exists alone, C and D exist simultaneously, and D exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after it are in an "or" relationship.

[0050] In the embodiments of the present application, the same reference numerals indicate the same parts, and for the sake of brevity, detailed descriptions of the same parts in different embodiments will be omitted. It should be understood that the dimensions such as thickness, length, and width of various parts in the embodiments of the present application and the dimensions such as thickness, length, and width of the overall integrated device are for illustrative purposes only and are not intended to limit the configuration of the present application.

[0051] As used herein, the term "plurality" means two or more (including two).

[0052] In this application, the 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, magnesium ion battery cells, etc., but the embodiments of this application are not limited thereto. The battery cells may have a cylindrical, flat, rectangular, or other shape, etc., but the embodiments of this application are not limited thereto. Battery cells are generally packaged into three types: cylindrical battery cells, prismatic battery cells, and pouch battery cells, but the embodiments of this application are not limited thereto.

[0053] The battery described 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 described in this application may include a battery module or a battery pack. A battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0054] A battery cell includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell operates primarily through the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector includes a positive electrode current collector and a positive electrode protrusion protruding from the positive electrode current collector. The positive electrode current collector is coated with the positive electrode active material layer, and at least a portion of the positive electrode protrusion is not coated with the positive electrode active material layer, and the positive electrode protrusion is called a positive electrode tab. For example, in a lithium-ion battery, the positive electrode current collector may be made of aluminum, and the positive electrode active material layer includes a positive electrode active material. The positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. 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 collector and negative electrode protrusions protruding from the negative electrode current collector. The negative electrode current collector is coated with a negative electrode active material layer, and at least a portion of the negative electrode protrusions is not coated with the negative electrode active material layer, and the negative electrode protrusions are negative electrode tabs. The negative electrode current collector may be made of copper, and the negative electrode active material layer includes a negative electrode active material, which may be carbon or silicon, etc. To ensure that a large current passes without fusing, multiple positive electrode tabs and multiple negative electrode tabs are stacked. The separator may be made of PP (polypropylene) or PE (polyethylene), etc. The electrode assembly may have a wound structure or a stacked sheet structure, but the present application is not limited thereto.

[0055] After discovering the problem of poor safety performance of battery cells, the inventors conducted systematic analysis and research into the structure and operating process of battery cells, and found that the specific internal operating conditions of battery cells cannot be predicted during operation. Therefore, when a battery cell is in adverse conditions such as high temperature or high pressure, operators or their controllers cannot respond accordingly based on the specific operating conditions. As the battery cell operates for an extended period of time under adverse conditions, it may cause adverse effects such as battery cell explosion, which seriously affects the safety performance of the battery cell.

[0056] Based on the above problems discovered by the inventor, the inventor has improved the structure of the battery cell, and the technical solutions described in the embodiments of the present application are applicable to the battery cell, the battery including the battery cell, and the power consumption device using the battery.

[0057] A battery cell according to an embodiment of the present application includes a housing and at least one integrated circuit device, the housing having a chamber, the integrated circuit device including a detection element for detecting an operating condition of the battery cell, and the integrated circuit device being provided inside or outside the chamber.

[0058] The battery cell according to the embodiment of the present application is provided with an integrated circuit device including a detection element, and the integrated circuit device is provided inside or outside the battery cell so that the detection element can obtain the internal operating status of the battery cell in real time. When the detection element detects that a certain safety risk exists in the battery cell, the integrated circuit device can transmit information to an external control unit so that the control element can control the battery cell to take or not take a corresponding reaction, or the control element can send an alarm so that an operator can take a corresponding reaction, thereby reducing the possibility of the safety risk existing in the battery cell becoming further worse, which is advantageous to improving the safety performance of the battery cell.

[0059] The power consuming devices may be vehicles, mobile phones, portable devices, laptops, steamships, spacecraft, electric toys, power tools, etc. The vehicles may be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles, and the new energy vehicles may be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc. The spacecraft may include airplanes, rockets, space shuttles, spaceships, etc. The electric toys may include stationary or mobile electric toys such as game consoles, electric car toys, electric steamship toys, and electric aircraft toys, and the electric tools may include metal cutting power tools, polishing power tools, assembly power tools, and railway power tools, such as electric drills, electric grinding machines, electric wrenches, electric screwdrivers, hammers, electric impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application are not particularly limited to the above power consuming devices.

[0060] In the following embodiment, for convenience of explanation, the power consuming device is a vehicle.

[0061] As shown in Fig. 1, 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 supply power to the vehicle 1, and for example, the battery 10 can be used as an operating power source for the vehicle 1.

[0062] The vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b controls a battery 10 to supply power to the motor 1a, for example, for starting the vehicle 1, navigation, and operating power needs during driving.

[0063] In some embodiments of the present application, the battery 10 may not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, and may provide driving power for the vehicle 1 in place of or in place of fuel or natural gas.

[0064] As shown in Figure 2, the battery 10 includes a battery cell (not shown in Figure 2). It may further include a housing for housing the battery cells.

[0065] The housing is for housing the battery cells and may have a variety of structural forms. In some embodiments, the housing may include a first housing portion 11 and a second housing portion 12. The first housing portion 11 and the second housing portion 12 are fitted together. The first housing portion 11 and the second housing portion 12 together define a housing space for housing the battery cells. The second housing portion 12 may have a hollow structure with one end open, and the first housing portion 11 may have a plate-like structure. The first housing portion 11 may be fitted to the open side of the second housing portion 12 to form a housing having a housing space. Alternatively, both the first housing portion 11 and the second housing portion 12 may have a hollow structure with one end open. The open side of the first housing portion 11 may be fitted to the open side of the second housing portion 12 to form a housing having a housing space. Naturally, the first housing part 11 and the second housing part 12 may have various shapes, such as a cylinder or a rectangular parallelepiped.

[0066] In order to improve the sealing performance after the first housing part 11 and the second housing part 12 are connected, a sealing part, such as a sealing rubber or a sealing ring, may be provided between the first housing part 11 and the second housing part 12.

[0067] Assuming that the first housing part 11 fits over the second housing part 12, the first housing part 11 is also called an upper housing cover, and the second housing part 12 is also called a lower housing.

[0068] The battery 10 may have one or more battery cells. When there are multiple battery cells, the multiple battery cells can be connected in series, parallel, or series-parallel. Series-parallel means that the multiple battery cells are connected both in series and in parallel. The multiple battery cells can be connected in direct series, parallel, or series-parallel, and the entire configuration of the multiple battery cells can be housed in a housing, or the multiple battery cells can be first connected in series, parallel, or series-parallel to form a battery module 20. The multiple battery modules 20 are further integrated in series, parallel, or series-parallel and housed in a housing.

[0069] In some embodiments, as shown in FIG. 3, FIG. 3 is a schematic diagram of the configuration of the battery module 20 shown in FIG. 2. The battery module 20 includes a plurality of battery cells 30. The plurality of battery cells 30 are first connected in series, parallel, or series-parallel to form the battery module 20. The plurality of battery modules 20 are then further integrated in series, parallel, or series-parallel and housed in a housing.

[0070] In some embodiments, the multiple battery cells 30 in the battery module 20 are electrically connected by bus components, and the multiple battery cells 30 in the battery module 20 can be connected in parallel, series, or series-parallel.

[0071] As shown in FIG. 4, FIG. 4 is an exploded schematic view of the battery cell 30 shown in FIG.

[0072] 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 housing chamber 31a, and the integrated circuit device 34 includes a detection element for detecting the operating status of the battery cell 30, and the integrated circuit device is provided inside or outside the housing chamber 31a.

[0073] In some embodiments, the battery cell 30 further includes an electrode assembly 32 housed within the housing 31a.

[0074] In some embodiments, the housing 31 includes a case 311 that is a hollow structure having an opening 311a on one side, and an end cover 312 that fits over the opening 311a of the case 311 to form a sealed connection to form an enclosed space for containing the electrode assembly 32 and the electrolyte.

[0075] When assembling the battery cell 30, the electrode assembly 32 is first placed in the case 311, then the end cover 312 is fitted to the opening 311a of the case 311, and then electrolyte can be injected into the case 311 through the electrolyte injection hole on the end cover 312.

[0076] In some embodiments, the housing 31 is further used to contain an electrolyte, for example, an electrolyte solution. The housing 31 may take a variety of structural forms.

[0077] The case 311 may have various shapes, such as a cylinder or a rectangular parallelepiped. The shape of the case 311 is determined by the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 has a cylindrical structure, the case 311 may have a cylindrical structure. If the electrode assembly 32 has a rectangular parallelepiped structure, the case 311 may have a rectangular parallelepiped structure. In FIG. 4, both the case 311 and the electrode assembly 32 have a rectangular parallelepiped structure, for example.

[0078] The case 311 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and the embodiment of the present application is not particularly limited thereto.

[0079] There may be one or more electrode assemblies 32 housed in the case 311. In Figure 4, there are two electrode assemblies 32 housed in the case 311.

[0080] Various types of detection units, circuits, or related control devices can be integrated into the integrated circuit device 34. The shape of the integrated circuit device 34 can be a plate-like, block-like, sheet-like, ball-like, tapered, or other irregular shape, etc., and can be selected according to actual needs.

[0081] Optionally, the integrated circuit device 34 may be provided in the housing 31, or in the electrode assembly 32, or in other structures of the battery cell 30, and can be configured depending on the specific parameters within the battery cell 30 to be detected.

[0082] In an embodiment in which the integrated circuit device 34 is provided in the housing 31, the integrated circuit device 34 may be provided in the housing 311 or in the end cap 312. The integrated circuit device 34 may be provided inside the housing 31, outside the housing 31, or both inside and outside the housing 31.

[0083] Optionally, the detection element may be a sensor such as a temperature sensor, a pressure sensor, or a stress sensor for detecting parameters such as temperature, pressure, or stress at a corresponding position. Of course, the detection element may also be other related members for detecting gas components and their contents inside the battery cell 30.

[0084] For example, a detection element may be provided to detect the air pressure inside the battery cell 30, and the detection result may be transmitted to an associated control element, which may then make corresponding adjustments to reduce the risk of the air pressure inside the battery cell 30 rising further and affecting the safety performance of the battery cell 30. Alternatively, a detection element may be provided to detect the temperature of any battery cell 30 that needs to be monitored, and a control unit inside or outside the battery cell 30 may make corresponding reactions to reduce the risk of the temperature rising further. Alternatively, a detection element may be provided to detect the content of a specific gas inside the battery cell 30, and the associated control element may determine whether the battery cell 30 is in a normal circulation operation state. If the content of the specific gas is not within a predetermined range, the control element may control the battery cell 30 to take corresponding remedial measures, or the control element may issue an alarm, allowing an operator to immediately take relevant remedial measures to ensure the normal operation of the battery cell 30.

[0085] 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 integrate one type of detection element, or multiple types of detection elements at the same time.

[0086] In an embodiment in which multiple integrated circuit devices 34 are provided in one battery cell 30, the structures of the different integrated circuit devices 34 may be the same, or the structures of the integrated circuit devices 34 or the functions of the detection elements therein may be different, and the different integrated circuit devices 34 may be provided in different corresponding positions to enable the different integrated circuit devices 34 to detect different operating parameters of the battery cell 30.

[0087] In some embodiments, the integrated circuit device 34 is electrically connected to a control element inside or outside the battery cell 30 via an optical fiber, a cable, or the like, so that the integrated circuit device 34 transmits information about each detected parameter of the battery cell 30 to the control element, and facilitates the control element to take or not take a corresponding reaction according to the detection result.

[0088] Of course, the communication method between the integrated circuit device 34 and a control element inside or outside the battery cell 30 may be wireless communication. That is, the integrated circuit device 34 is not connected to the external control element via a wired line, but transmits the detected operating status of the battery cell 30 to the control element outside the battery cell 30 by wireless transmission.

[0089] The battery cell 30 according to the embodiment of the present application is provided with an integrated circuit device 34, which includes a detection element, so that the internal operating status of the battery cell 30 can be grasped in real time by the detection element, which makes it easy for the control element inside or outside the battery cell 30 to perform or not perform the corresponding reaction operation, which reduces the possibility of the safety risks existing in the battery cell 30 becoming further worse, and is thereby advantageous to improving the safety performance of the battery cell 30.

[0090] In some embodiments, the integrated circuit device 34 is in the form of a plate, sheet, or block.

[0091] Depending on the installation position of the integrated circuit device 34, an appropriate shape can be selected to fit the internal spatial layout of the battery cell 30, and the increase in the internal space of the battery cell 30 due to the provision of the integrated circuit device 34 can be minimized. This is advantageous in that it is possible to detect the operating status of the battery cell 30 in real time, while at the same time ensuring the energy density of the battery cell 30.

[0092] For example, if the electrode assembly 32 is cylindrical, the integrated circuit device 34 may be provided so as to assume an arcuate shape bonded to the surface of the cylindrical electrode assembly 32. If part of the surface of the electrode assembly 32 is flat and other part of the surface is arcuate, the integrated circuit device 34 may be provided so as to assume a flat plate shape or an arcuate shape that matches the arcuate surface of the electrode assembly 32, depending on the relative positions of the integrated circuit device 34 and the electrode assembly 32.

[0093] In some embodiments, the sensing element comprises a temperature sensor, a pressure sensor, a current sensor, a gas composition detection sensor, a Bragg grating, or a Fabry-Perot resonator.

[0094] Specifically, the temperature sensor is used to measure the temperature at a specific location in the battery cell 30, the pressure sensor is used to measure the gas pressure at a specific location in the battery cell 30, and the current sensor is used to measure the current flowing through structures related to the battery cell 30, such as the electrode terminals 33. The gas component detection sensor is used to detect the gas components and their contents within the battery cell 30, for example, the content of gas components generated by decomposition of the electrolyte, and determine the content of the electrolyte within the battery cell 30. The Bragg grating is used to detect hydrogen gas within the battery 10 or the state of dendrite growth within the battery cell 30. The Fabry-Perot resonator is used to detect the pressure within the battery cell 30 with greater sensitivity.

[0095] Optionally, one integrated circuit device 34 may be provided that integrates any one of a temperature sensor, a pressure sensor, a current sensor, a gas component detection sensor, a Bragg grating, and a Fabry-Perot resonator, or multiple detection elements may be integrated into the same integrated circuit device 34 so that the integrated circuit device 34 has multiple detection functions, depending on the specific situation.

[0096] Therefore, it is advantageous for the integrated circuit device 34 to obtain the operating status of the battery cell 30 more timely and accurately by providing a detection element including a temperature sensor, a pressure sensor, a current sensor, a gas component detection sensor, a Bragg grating, or a Fabry-Perot resonator.

[0097] In some embodiments, at least one integrated circuit device 34 includes a wireless communication unit for wirelessly communicating with the outside of the battery cell 30 .

[0098] Specifically, the operating status of the battery cell 30 detected by the detection unit can be transmitted to a control unit outside the battery cell 30 via the wireless communication unit, making it easy to determine whether or not to take a corresponding action on the battery cell 30. In this way, the circuit connection structure of the battery cell 30 can be simplified, and the complexity of the circuit arrangement inside or outside the battery 10 can be reduced.

[0099] 5 and 6 show schematic diagrams of the battery cell according to the embodiment of the present invention in which the integrated circuit device 34 is provided on the tab 322 and the electrode body 321, respectively.

[0100] 5 and 6 , in some embodiments, the battery cell 30 further includes an electrode assembly 32 housed in the housing 31a and including an electrode body 321 and a tab 322 extending from an end of the electrode body 321. At least one integrated circuit device 34 is provided on the tab 322 and / or at least one integrated circuit device 34 is provided on the electrode body 321.

[0101] Optionally, the integrated circuit device 34 may be provided only on the tab 322 , or only on the electrode body 321 , or on both the tab 322 and the electrode body 321 .

[0102] Optionally, the integrated circuit device 34 may be provided on the surface of the tab 322 or may be provided inside the tab 322. Similarly, the integrated circuit device 34 may be provided on the surface of the electrode body 321 or may be provided inside the electrode body 321.

[0103] In an embodiment in which the integrated circuit device 34 is mounted on the tab 322, the detection element in the integrated circuit device 34 can detect information such as the current or temperature of the tab 322, making it easier to determine the overcurrent capacity or heat generation status of the tab 322.

[0104] In an embodiment in which the integrated circuit device 34 is provided in the electrode body 321, the detection element of the integrated circuit device 34 can detect stress inside or on the surface of the electrode body 321, making it easier to determine the expansion status of the electrode body 321, or the detection element in the integrated circuit device 34 can detect information such as the temperature of the electrode body 321.

[0105] 7 and 8, in some embodiments, the electrode body 321 includes 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 connect the two second surfaces 321b, and a tab 322 is drawn out from the electrode body 321 along an end portion in a third direction Z, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first surfaces 321a are arranged in an arc shape, and at least one integrated circuit device 34 is provided on the first surfaces 321a.

[0106] As a result, the electrode assembly 32 may be a rectangular wound electrode assembly, and since there is a large space between the arc-shaped first surface 321a and the housing 31, this space can be used to provide the integrated circuit device 34. Therefore, at least one integrated circuit device 34 is provided on the first surface 321a.

[0107] 4 and 7 , in some embodiments, battery cell 30 further includes a current collector 35 electrically connected to tab 322. The surface of tab 322 facing housing 31 has a first connection region and a second connection region, the first connection region is connected to current collector 35, and at least one integrated circuit device 34 is provided on the second connection region and spaced apart from current collector 35.

[0108] Optionally, the integrated circuit device 34 may be glued, adhesively or hot melt connected to the surface of the second connection area, or may be fitted within the second connection area.

[0109] In this way, the connection between the integrated circuit device 34 and the tab 322 can be easily achieved, and the integrated circuit device 34 and the current collector 35 are spaced apart, which is advantageous in reducing the risk of electrical connection between the integrated circuit device 34 and the current collector 35, and further reduces the possibility of affecting the normal operation of the integrated circuit device 34 or the current collector 35.

[0110] In some embodiments, the battery cell 30 further includes an electrode assembly 32 and an insulator 36, where the insulator 36 and the electrode assembly 32 are positioned within the receiving chamber 31a, and the insulator 36 is provided between the housing 31a and a peripheral surface of the electrode assembly 32. At least one integrated circuit device 34 is provided on the insulator 36.

[0111] Specifically, the insulator 36 may be coated on the peripheral surface of the electrode assembly 32 to insulate the electrode assembly 32 from the housing 31 .

[0112] Optionally, at least one integrated circuit device 34 may be provided on a surface of the insulator 36 closer to the electrode assembly 32, or on a surface of the insulator 36 closer to the housing 31, or the integrated circuit device 34 may be provided so as to be fitted inside the insulator 36.

[0113] In this embodiment, the detection element in the integrated circuit device 34 includes a stress sensor or the like for detecting the stress of the insulator 36, so that the damage state of the insulator 36 can be grasped in real time.

[0114] 9 and 10 show schematic diagrams of the battery cell according to the embodiment of the present invention, in which the integrated circuit device 34 is provided on the first wall 313. FIG.

[0115] As shown in FIGS. 9 and 10, in some embodiments, the housing 31 includes a first wall 313 and the at least one integrated circuit device 34 is disposed on the first wall 313 .

[0116] Optionally, the first wall 313 may be part of the end cap 312 , or the first wall 313 may be part of the case 311 .

[0117] Optionally, the integrated circuit device 34 may be provided on the side of the first wall 313 closer to the accommodation chamber 31a, or on the side of the first wall 313 farther from the accommodation chamber 31a, i.e., outside the first wall 313, or at least a portion of the integrated circuit device 34 may be fitted inside the first wall 313. The arrangement can be tailored to specific needs.

[0118] In this way, information such as the temperature of the first wall 313 of the battery cell 30 can be obtained in real time, and the operating status of the battery cell 30 can be determined based on the temperature information of the first wall 313.

[0119] In some embodiments, the integrated circuit device 34 is adhesively, glue-on, or hot melt-connected to the first wall 313 .

[0120] Specifically, the integrated circuit device 34 may be adhesively connected to the first wall 313 via an adhesive, or the integrated circuit device 34 and the first wall 313 may have a fitting concave-convex structure, and the engagement connection between them may be realized via the concave-convex structure. Alternatively, a molten hot melt part may be provided between the first wall 313 and the integrated circuit device 34, and the connection between the first wall 313 and the integrated circuit device 34 may be realized after the hot melt part is cooled and solidified.

[0121] In this way, the connection between the integrated circuit device 34 and the first wall 313 is simple and the connection is highly reliable.

[0122] As shown in FIGS. 11-13, in some embodiments, the first wall 313 has a recessed groove 313a, and at least one integrated circuit device 34 is disposed in the recessed groove 313a.

[0123] Optionally, depending on the installation position of the integrated circuit device 34, the recessed groove 313a may be provided so as to face the receiving chamber 31a, or the recessed groove 313a may be provided so as to face the outside of the battery cell 30.

[0124] It is understood that by forming the first wall 313 to have a groove 313a and by forming the integrated circuit device 34 in the groove 313a, it is advantageous to reduce the amount of space occupied by the integrated circuit device 34 inside or outside the battery cell 30, thereby increasing the energy density of the battery cell 30 and facilitating grouping of the battery cells 30.

[0125] Optionally, the integrated circuit device 34 may be disposed in the groove 313a and then protrude into the groove 313a, or may be completely housed within the groove 313a, as desired, and is not limited thereto.

[0126] In some embodiments, the depth of the groove 313a is h1, the thickness of the integrated circuit device 34 is h2, and h1≧h2.

[0127] 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 .

[0128] This allows the integrated circuit device 34 to be completely positioned within the recess 313a, reducing the amount of extra space occupied by the integrated circuit device 34 and improving the energy density of the battery cell 30, while also reducing the risk of the integrated circuit device 34 being impacted or caught and falling off the first wall 313.

[0129] As shown in FIG. 14, in some embodiments, the first wall 313 has a boss 313b, and the at least one integrated circuit device 34 is mounted on the boss 313b.

[0130] Optionally, the boss 313b may be arranged to protrude toward one side of the accommodating chamber 31a, in which case the integrated circuit device 34 may be arranged to protrude toward one side of the accommodating chamber 31a of the boss 313b, or the boss 313b may be arranged toward the outside of the battery cell 30, in which case the integrated circuit device 34 may be arranged outside the battery cell 30.

[0131] The first wall 313 is provided with a boss 313b, and the integrated circuit device 34 is provided on the boss 313b, which is advantageous in improving the connection strength and connection stability between the integrated circuit device 34 and the first wall 313.

[0132] As shown in FIG. 15 , in some embodiments, the housing 31 includes a first wall 313, the battery cell 30 further includes a support member 37, and the at least one integrated circuit device 34 is connected to the support member 37, which is connected to the first wall 313.

[0133] Optionally, the first wall 313 may be part of the case 311, part of the end cap 312, or both part of the case 311 and part of the end cap 312 are provided with the first wall 313.

[0134] This allows the integrated circuit section to be first connected to the support component 37, and then the support component 37 and the first wall 313 to be connected to the integrated circuit device 34 via the support component 37. This simplifies the assembly process of the battery cell 30, improves the production efficiency of the battery cell 30, and is advantageous in improving the connection stability of the integrated circuit device 34.

[0135] Optionally, the support part 37 can be connected to the first wall 313 by a fastening connection, an adhesive connection, a screw connection, a rivet connection, a pin connection, etc., which can be selected according to specific needs and are not limited here.

[0136] In some embodiments, the support piece 37 is hot melt, adhesively, or fasteningly connected to the first wall 313 .

[0137] By providing the support component 37 so as to be connected to the first wall 313 by the above-described connection method, the connection method is simple and the connection reliability is high.

[0138] In some embodiments, at least one integrated circuit device 34 is adhesively, glue-connected, or hot-melt-connected to support member 37 .

[0139] For example, the support component 37 may be provided with an engagement groove that is suitable for the outer shape of the integrated circuit device 34, and the integrated circuit device 34 may be engaged in the engagement groove, or the integrated circuit device 34 may be adhesively or hot-melt connected in the engagement groove.

[0140] This makes it easier to connect the integrated circuit device 34 to the support component 37 .

[0141] 16 , in some embodiments, the first wall 313 includes a main body portion 3131 and an insulating portion 3132, and the insulating portion 3132 is provided on a side of the main body portion 3131 closer to the accommodation chamber 31a. The insulating portion 3132 has a protrusion 3132a provided to protrude toward the accommodation chamber 31a, and at least one integrated circuit device 34 is provided on the insulating portion 3132. The integrated circuit device 34 is provided alongside the protrusion 3132a along a thickness direction O perpendicular to the first wall 313.

[0142] When the insulating portion 3132 is provided on the side of the main body portion 3131 closer to the storage chamber 31a, the insulating portion 3132 is located between the main body portion 3131 and the electrode assembly 32, thereby achieving insulation between the main body portion 3131 and the electrode assembly 32.

[0143] Optionally, the protrusion 3132 a can abut against the electrode assembly 32 to fix the electrode assembly 32 , reducing the risk of the electrode assembly 32 rattling inside the battery cell 30 .

[0144] In an embodiment in which the first wall 313 is the end cap 312 , the first wall 313 is further provided with an electrode terminal 33 , and in this case, an integrated circuit device 34 may be simultaneously provided alongside the electrode terminal 33 .

[0145] It is understood that arranging the integrated circuit device 34 alongside the protrusion 3132a along the thickness direction O perpendicular to the first wall 313 is advantageous in saving space inside the battery cell 30 and reducing the pushing force between the integrated circuit device 34 and the electrode assembly 32, and further reducing the risk of the integrated circuit device 34 damaging the surface of the electrode assembly 32.

[0146] In some embodiments, the maximum size of the integrated circuit device 34 along the thickness direction O is smaller than the size of the protrusion 3132a.

[0147] As a result, when the protrusion 3132a abuts the electrode assembly 32, a certain gap still exists between the integrated circuit device 34 and the electrode assembly 32, reducing the amount of extra space occupied by the integrated circuit device 34 within the battery cell 30 and reducing the risk of interference between the integrated circuit device 34 and the electrode assembly 32.

[0148] 4, 16, and 17, in some embodiments, the battery cell 30 further includes an electrode terminal 33 formed in the main body portion 3131 and the insulating portion 3132. The integrated circuit device 34 is provided at a distance from the electrode terminal 33 along a thickness direction O perpendicular to the first wall 313.

[0149] The electrode terminal 33 is drilled through the main body portion 3131 and the insulating portion 3132 so as to be electrically connected to the current collector 35 and the tab 322. By providing the integrated circuit device 34 and the electrode terminal 33 with a gap therebetween, the risk of interference between the integrated circuit device 34 and the electrode terminal 33 is reduced, and the risk of the two being electrically connected to each other and affecting the normal operation of the battery cell 30 is reduced.

[0150] In some embodiments, at least one integrated circuit device 34 is provided on the side of the first wall facing the storage chamber 31a. The battery cell 30 includes a plurality of electrode assemblies 32, each having two first surfaces 321a opposed to each other along a first direction X and two second surfaces 321b opposed to each other along a second direction Y, the two first surfaces 321a connected to the two second surfaces 321b, the first surfaces 321a having an arc shape, and the first direction X being perpendicular to the second direction Y. The at least one integrated circuit device 34 is located between two adjacent first surfaces 321a along the second direction Y.

[0151] The integrated circuit device 34 is disposed between two adjacent first surfaces 321a along the second direction Y. That is, the integrated circuit device 34 is accommodated in the space formed by the arc-shaped surfaces of two adjacent electrode assemblies 32 in the battery cell 30 and the first wall 313. This is advantageous for rationally utilizing the internal space of the battery cell 30, reducing the internal space of the battery cell 30 that would otherwise be increased by providing the integrated circuit device 34, and improving the energy density of the battery cell 30.

[0152] In some embodiments, the battery cell 30 further includes a first wall 313 and an electrode terminal 33 for transmitting electric power, the electrode terminal 33 being provided on the first wall 313. At least one integrated circuit device 34 is provided on a part of an end surface of the electrode terminal 33 that is located outside the accommodation chamber 31 a.

[0153] As a result, the integrated circuit device 34 is used to detect information such as the temperature of the electrode terminal 33 or the current flowing through the electrode terminal 33, and to grasp the operating status of the electrode terminal 33 in real time.

[0154] When the integrated circuit device 34 is connected to a portion of the end face of the terminal of the battery 10 that is located outside the storage chamber 31a, the other portion of the end face of the electrode terminal 33 may be connected to a bus component 40 in the battery 10 and used to realize series or parallel connection of adjacent battery cells 30.

[0155] Specifically, the electrode terminal 33 may be connected to the current collector 35 inside the battery cell 30 to be connected to the tab 322 via the current collector 35, or the electrode terminal 33 may be connected to a lithium replenishment member inside the battery cell 30 to supply power to the lithium replenishment member to release lithium ions or elemental lithium in a timely manner.

[0156] Optionally, the integrated circuit device 34 may be directly connected to the electrode terminal 33, or may be connected to the electrode terminal 33 via an intermediate connecting part, which can be selected according to actual needs.

[0157] In some embodiments, the integrated circuit device 34 is adhesively or welded to the electrode terminals 33 .

[0158] This simplifies the connection between the integrated circuit and the electrode terminals 33 and provides good connection stability.

[0159] 18 and 19 , in some embodiments, the housing 31 includes a first wall 313, and the battery cell 30 further includes a support component 38, an insulating member 39, and an electrode terminal 33 for transmitting power, where the insulating member 39 is used to insulate the electrode terminal 33 from the first wall 313. The support component 38 is connected to the insulating member 39, and the at least one integrated circuit device 34 is provided on the support component 38.

[0160] Specifically, the electrode terminal 33 is drilled through the first wall 313 and is used to connect to the current collector 35 or lithium replenishment member inside the battery cell 30 .

[0161] At least a portion of the insulating member 39 is provided between the electrode terminal 33 and the first wall 313 so as to achieve insulation between the electrode terminal 33 and the first wall 313. It will be understood that the integrated circuit device 34 can be connected to the insulating member 39 via the support part 38, and the integrated circuit device 34 can be wire-bonded to the support part 38, and the support part 38 can be connected to the insulating member 39 during assembly of the battery cell 30.

[0162] In some embodiments, when an electrode terminal 33 is provided on the first wall 313, it is necessary to provide one insulating member 39 between the first wall 313 and the electrode terminal 33, and the support part 38 can be connected to the one insulating member 39. In other embodiments, when a plurality of electrode terminals 33 are provided on the first wall 313, it is necessary to provide two insulating members 39 between the first wall 313 and the two electrode terminals 33, and in this case, the support part 38 can be connected to one insulating member 39 or to both insulating members 39.

[0163] In this way, the assembly process of the battery cell 30 is simplified, and at the same time, the connection stability between the integrated circuit device 34 and the support component 38, and between the support component 38 and the insulating member 39 is better, which is advantageous in improving the connection stability of the integrated circuit device 34 and reducing the risk of the integrated circuit device 34 falling off.

[0164] A battery 10 according to an embodiment of the present application includes a battery cell 30 according to any of the above embodiments.

[0165] The battery 10 according to the embodiment of the present application uses the battery cell 30 according to any of the above embodiments, and therefore provides the same technical effects, so a description thereof will be omitted here.

[0166] As shown in Figures 3, 4, 20, and 21, in some embodiments, the battery 10 further includes a bus component 40 for electrically connecting two adjacent battery cells 30 and a harness spacer 50, the bus component 40 is connected to the harness spacer 50, and the at least one integrated circuit device 34 is provided on the side of the harness spacer 50 facing the battery cells 30.

[0167] Specifically, the bus part 40 can connect the electrode terminals 33 of two adjacent battery cells 30 so as to connect the two adjacent battery cells 30 in series or parallel. The bus part 40 and the electrode terminals 33 are locked together by studs, and the position of the studs can be controlled by connecting the studs to the harness spacer 50. The harness spacer 50 can be made of plastic.

[0168] When the integrated circuit device 34 is provided on the harness spacer 50 on the side of the harness spacer 50 facing the battery cell 30, the integrated circuit device 34 is provided in the space between the harness spacer 50 and the battery cell 30, thereby reducing the extra space occupied by the integrated circuit device 34. Furthermore, the integrated circuit device 34 can be provided to detect changes in pressure, temperature, etc., so as to grasp the operating status of the corresponding battery cell 30 in real time.

[0169] According to the battery 10 of the embodiment of the present application, the battery 10 includes the battery 10 of any of the above embodiments, and is used to provide power.

[0170] In addition, if there is no contradiction, the embodiments and features of the embodiments in this application may be combined with each other.

[0171] Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present application, and are not intended to be limiting thereto. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may modify the technical solutions described in each of the above embodiments or substitute some technical features thereof with equivalents, but it is understood that these modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. A battery cell, a housing having a chamber; at least one integrated circuit device including a detection element for detecting an operating state of the battery cell, the integrated circuit device being provided inside or outside the accommodation chamber; Including, The battery cell further includes an electrode assembly housed in the housing and including an electrode body and a tab extending from an end of the electrode body; at least one integrated circuit device is provided on the tab and / or the electrode body; the electrode body includes two first surfaces provided opposite to each other along a first direction and two second surfaces provided opposite to each other along a second direction, the two first surfaces connect the two second surfaces, the first surfaces are provided in an arc shape, the tab is drawn out from an end of the electrode body along a third direction, the first direction, the second direction, and the third direction are perpendicular to each other, and at least one of the integrated circuit devices is provided on the first surface; Battery cell.

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

3. 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 resonator. The battery cell according to claim 1 .

4. At least one of the integrated circuit devices further includes a wireless communication unit for wirelessly communicating with an external device of the battery cell. The battery cell according to any one of claims 1 to 3.

5. the battery cell further includes a current collector electrically connected to the tab; The surface of the tab facing the housing has a first connection region and a second connection region, the first connection region is connected to the current collector, and at least one of the integrated circuit devices is provided on the second connection region and spaced apart from the current collector. The battery cell according to any one of claims 1 to 3.

6. The battery cell further includes an electrode assembly and an insulator, the insulator and the electrode assembly are positioned within the accommodating chamber, the insulator is provided between the housing and a peripheral surface of the electrode assembly, and the at least one integrated circuit device is provided on the insulator. The battery cell according to any one of claims 1 to 3.

7. the housing includes a first wall on which the at least one integrated circuit device is disposed; The battery cell according to any one of claims 1 to 3.

8. the integrated circuit device is adhesively, glue-connected, or hot-melt-connected to the first wall; The battery cell according to claim 7 .

9. the first wall has a recessed groove in which at least one of the integrated circuit devices is provided; The battery cell according to claim 7 .

10. The depth of the groove is h1, the thickness of the integrated circuit device is h2, and h1≧h2; The battery cell of claim 9 .

11. the first wall has a boss on which at least one of the integrated circuit devices is mounted; The battery cell according to claim 7 .

12. the housing includes a first wall, the battery cell further includes a support component, the at least one integrated circuit device is connected to the support component, and the support component is connected to the first wall; The battery cell according to any one of claims 1 to 3.

13. the support part is connected to the first wall by hot melt connection, adhesive connection or fastening connection; The battery cell of claim 12.

14. At least one of the integrated circuit devices is adhesively, glue-connected, or hot-melt-connected to the support component; The battery cell of claim 12.

15. the first wall includes a main body portion and an insulating portion provided on a side of the main body portion closer to the accommodating chamber, the insulating portion having a protrusion provided so as to protrude toward the accommodating chamber, and the at least one integrated circuit device is provided on the insulating portion; the integrated circuit device is provided alongside the protrusion along a thickness direction perpendicular to the first wall; The battery cell according to claim 7 .

16. a maximum size of the integrated circuit device along the thickness direction is smaller than a size of the protrusion; The battery cell of claim 15.

17. the battery cell further includes an electrode terminal, the electrode terminal being drilled through the main body portion and the insulating portion, and the integrated circuit device being provided at a distance from the electrode terminal along a thickness direction perpendicular to the first wall. The battery cell of claim 15.

18. At least one of the integrated circuit devices is provided on a side of the first wall facing the chamber, The battery cell includes a plurality of electrode assemblies having two first surfaces opposed to each other along a first direction and two second surfaces opposed to each other along a second direction, the two first surfaces being connected to the two second surfaces, the first surfaces being arc-shaped, the first direction being perpendicular to the second direction and parallel to a thickness direction of the first wall, and At least one of the integrated circuit devices is located between two of the first surfaces adjacent along the second direction. The battery cell according to claim 7 .

19. the battery cell further includes a first wall and an electrode terminal provided on the first wall for transmitting electric power, and the at least one integrated circuit device is connected to a part of an end surface of the electrode terminal located outside the accommodation chamber. The battery cell according to any one of claims 1 to 3.

20. the integrated circuit device is connected to the electrode terminals by adhesive or welding; 20. The battery cell of claim 19.

21. the housing includes a first wall, the battery cell further includes a support part, an insulating member, and an electrode terminal, the electrode terminal is used for transmitting electric power, and the insulating member is provided to insulate the electrode terminal from the first wall; the support component is connected to the insulating member, and the at least one integrated circuit device is mounted on the support component. The battery cell according to any one of claims 1 to 3.

22. A battery, A battery cell according to any one of claims 1 to 3, battery.

23. The battery comprises: a bus component for electrically connecting two adjacent battery cells; a harness spacer; the bus component is connected to the harness spacer, and the at least one integrated circuit device is provided on a side of the harness spacer facing the battery cell; 23. The battery of claim 22.

24. 1. A power consuming device, comprising:

23. The device of claim 22, comprising a battery for providing power. Power consumption equipment.

Images