Battery cells, batteries, and power consumption devices

Abstract

The present application provides a battery cell, a battery, and a power consumption device. The battery cell includes a housing with a mounting hole, and a connection terminal at least partially installed in the mounting hole, insulated from the housing, and used for information exchange between the inside and outside of the battery cell. The battery cell of the present application realizes information exchange between the inside and outside of the battery cell, so that information such as the internal operating status of the battery cell can be transmitted to the outside of the battery cell, or information such as a control signal from the outside of the battery cell can be transmitted to the inside of the battery cell, and information exchange between related elements inside the battery cell and related elements outside the battery cell can be facilitated, which ensures normal operation of the battery cell and is advantageous for improving the safety performance of the battery cell.

Description

Technical Field

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

Background Art

[0002] Batteries are widely used in electronic devices such as mobile phones, notebook computers, electric scooters, electric vehicles, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and electric 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 usage performance of battery cells, the issue of safety cannot be ignored. Therefore, how to improve the safety performance of battery cells is a technical problem that has been continuously improved in battery cell technology.

Summary of the Invention

[0004] This application provides a battery cell, a battery, and a power-consuming device that are advantageous for improving the safety performance of the battery cell.

[0005] In a first aspect, an embodiment of this application provides a battery cell including a housing having a mounting hole and a connection terminal that is at least partially installed in the mounting hole, installed to be insulated from the housing, and used for information exchange between the inside and the outside of the battery cell.

[0006] The battery cell according to the embodiment of this application is installed with a housing that has mounting holes, and the connection terminals are installed at least partially inside the mounting holes, thereby enabling information exchange between the inside and outside of the battery cell, transmitting information such as the operating status inside the battery cell to the outside of the battery cell, or transmitting information such as control signals from the outside of the battery cell to the inside of the battery cell, and facilitating information exchange between related elements inside the battery cell and related elements outside the battery cell, thereby ensuring the normal operation of the battery cell and being advantageous in improving the safety performance of the battery cell.

[0007] In some embodiments, multiple mounting holes are provided at intervals, and connection terminals are installed within each mounting hole.

[0008] This configuration facilitates information transmission between the inside and outside of the battery cell, and also easily enables the simultaneous transmission of multiple types of information between the inside and outside of the battery cell.

[0009] In some embodiments, the battery cell further includes an insulating member at least partially installed between the connection terminals and the inner wall of the mounting hole.

[0010] In this way, mutual isolation can be achieved between the connection terminals and the housing, allowing for more accurate and rapid information transmission from the connection terminals.

[0011] In some embodiments, a groove is formed on one of the connection terminal and the insulating member, and a projection is formed on the other, with the groove and projection engaging with each other. This engagement between the groove and projection ensures that the positions of the connection terminal and the insulating member are controlled, reducing the risk of them rattling relative to each other.

[0012] In some embodiments, an annular projection is formed on the circumferential surface of the connection terminal, and an annular groove is formed on the inner wall of the insulating member. This improves the positional regulating effect between the connection terminal and the insulating member by the projection and groove, and is advantageous in reducing the difficulty of assembling the connection terminal and the insulating member.

[0013] In some embodiments, the projection distance h1 from the circumferential surface of the connection terminal satisfies the condition h1 ≥ 0.1 mm. This is advantageous for ensuring the mutual engagement area between the projection and the groove, and also for ensuring the mutual positional regulating effect between the connection terminal and the insulating member.

[0014] In some embodiments, the connector terminal has multiple projections spaced apart, and the distance L between two adjacent projections satisfies L ≥ 0.1 mm. By installing the connector terminal so that multiple projections are spaced apart, it is advantageous to further secure the mutual engagement area between the projections and grooves, and to further secure the mutual positional regulating effect between the connector terminal and the insulating member. By installing the connector terminal so that the distance L between adjacent projections satisfies the above relationship, it is advantageous to facilitate the processing of the projections and grooves, and to further improve the positional regulating effect between the connector terminal and the insulating member due to the engagement between the projections and grooves.

[0015] In some embodiments, the housing includes a first wall, and mounting holes are installed through the first wall. The installation of mounting holes through the first wall facilitates the installation of connection terminals.

[0016] In some embodiments, the battery cell further includes electrode terminals provided on a first wall, the electrode terminals which transmit electrical energy and are spaced apart from the connection terminals. By spacing the electrode terminals apart from the connection terminals, the risk of electrical conductivity between them affecting the normal operation of the battery cell is reduced. Furthermore, by providing both the electrode terminals and the connection terminals on the first wall, the external space of the battery cell that would otherwise be occupied by the connection and electrode terminals is reduced, facilitating the grouping of battery cells into a battery and reducing the volume of the battery, thereby improving the battery's energy density.

[0017] In some embodiments, the distance the connection terminals protrude from the first wall along the thickness direction of the first wall is less than or equal to the distance the electrode terminals protrude from the same side of the first wall. This reduces the extra space along the thickness direction of the outside of the battery cell occupied by the installation of the connection terminals, reduces the internal volume of the battery occupied by the battery cells after grouping the battery cells, and is advantageous for improving the energy density of the battery.

[0018] In some embodiments, the battery cell further includes a sealing member that is at least partially in contact with the first wall and the connection terminals along the thickness direction of the first wall. The installation of the sealing member is advantageous for sealing the housing cavity of the battery cell, reducing the risk of external impurities entering the battery cell and corroding it, and reducing the risk of electrolyte leakage from inside the battery cell.

[0019] In some embodiments, the battery cell further includes a connecting member located on the circumferential side of the insulating member and connected to the first wall. This is advantageous for improving the connection strength between the connecting terminal and the insulating member, facilitating the installation of the connecting terminal and simplifying the assembly process of the connecting member.

[0020] In some embodiments, the connecting member is welded to the housing. This installation is advantageous in further improving the connection stability between the connecting terminal and the first wall.

[0021] In some embodiments, the insulating member is injection molded to connect the connecting member and the connecting terminal. This is advantageous for simplifying the manufacturing process of the battery cell and for improving the connection strength between the connecting terminal and the first wall.

[0022] In some embodiments, the connector includes a first sub-part and a second sub-part connected to each other, with a first wall provided between the first and second sub-parts. This configuration facilitates the connection between the connector and the first wall.

[0023] In some embodiments, the first sub-part and the second sub-part are crimped together. This configuration is advantageous for improving the connection strength between the first sub-part and the second sub-part, and also for simplifying the connection process between the first sub-part and the second sub-part.

[0024] In some embodiments, the housing includes a first wall and electrode terminals mounted on the first wall, the electrode terminals being positioned to transmit electrical energy and insulate from the first wall, mounting holes being positioned to penetrate the electrode terminals along the thickness direction of the first wall, and connection terminals being connected to the electrode terminals. This arrangement is advantageous in saving space in the first wall, facilitating the installation of other components on the first wall, and enabling a rational arrangement of the components of the battery cell.

[0025] In some embodiments, the battery cell further includes a current collector and an electrode assembly, the current collector and electrode assembly housed within a housing, the current collector electrically connects the electrode assembly and electrode terminals, the current collector has through holes, the connection terminals are installed through the through holes, or the battery cell further includes connecting wires electrically connected to the connection terminals through the through holes. In this way, even when the current collector covers the electrode terminals, electrical connection between the connection terminals and elements inside the battery cell can be achieved, and the connection terminals can easily transmit information.

[0026] In some embodiments, the battery cell is installed within a housing cavity and further includes a detection element electrically connected to the connection terminals to detect the operating status of the battery cell. Installing the battery cell to include the detection element allows the detection element to detect the operating status of the battery cell, ensuring normal operation of the battery cell and contributing to improved safety performance of the battery cell.

[0027] In some embodiments, the detection element includes a sensor. This further ensures the normal operation of the battery cell and improves the safety performance of the battery cell.

[0028] In a second aspect, an embodiment of the present application provides a battery including a battery cell of any of the embodiments of the first aspect.

[0029] Since the battery according to the embodiment of the present application uses the battery cell according to any of the above embodiments, it has the same technical effect and will not be described again here.

[0030] In some embodiments, the battery further includes a control unit electrically connected to the connection terminal and used for information transmission with the connection terminal.

[0031] The control element transmits information such as control signals to the connection terminal, and then transmits the information to the relevant execution components inside the battery cell through the connection terminal. Or, the connection terminal transmits information such as the pressure, temperature, stress, and gas components inside the battery cell to the control element, so that the control element can judge the operating status of the battery cell, facilitating the control element to control relevant elements to adjust the operating parameters, or facilitating the control element to issue an alarm to enable an operator to adjust the operating parameters of the battery. In this way, it is beneficial to further ensure the normal operation of the battery and also beneficial to improve the safety performance of the battery.

[0032] In a third aspect, an embodiment of the present application provides a power consumption device including the battery according to the embodiment of the second aspect for supplying electrical energy.

[0033] Since the power consumption device according to the embodiment of the present application uses the battery according to the embodiment of the present application, it has the same technical effect and will not be described again here.

Brief Description of the Drawings

[0034] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces 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 these drawings without creative efforts. [[ID=2,9]] [Figure 1] It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. [Figure 2] This is a schematic diagram of a battery exploded in three dimensions according to one embodiment of the present invention. [Figure 3] This is a schematic diagram of the structure of a battery module in a battery according to an embodiment of this application. [Figure 4] This is a schematic diagram of a battery cell according to an embodiment of the present application. [Figure 5] This is a front view in which some structural elements of a battery cell according to an embodiment of this application have been omitted. [Figure 6] Figure 5 is a schematic diagram of the cross-sectional structure along line AA. [Figure 7] This is a front view in which some structural elements of another battery cell according to an embodiment of this application have been omitted. [Figure 8] Figure 7 is a schematic diagram of the cross-sectional structure along line BB. [Figure 9] Figure 7 is a schematic diagram of the three-dimensional decomposed structure. [Figure 10] This is a front view of another battery cell according to an embodiment of the present application, with some structural elements omitted. [Figure 11] Figure 10 is a schematic diagram of the cross-sectional structure along the CC line. [Figure 12] Figure 10 is a schematic diagram of the three-dimensional decomposed structure. [Figure 13] This is a front view in which some structural elements of other battery cells according to the embodiment of this application have been omitted. [Figure 14] Figure 13 is a schematic diagram of the cross-sectional structure along the DD line. [Figure 15] This is a magnified view of point E in Figure 14. [Figure 16]This is a magnified view of another section at point E in Figure 14. In the drawing, the drawing is not drawn to the actual scale. Explanation of symbols 1 Vehicle, 1a Motor, 1b Controller, 10 Battery, 11 First housing, 12 Second housing, 20 Battery module, 30 Battery cell, 31 Housing, 31a Housing cavity, 31b Mounting hole, 311 Case, 311a Opening, 312 End cover, 313 First wall, 32 Electrode assembly, 321 Electrode body, 322 Tab, 33 Connection terminal, 331 First sub-part, 332 Second sub-part, 33a Projection, 34 Insulating member, 34a Groove, 35 Electrode terminal, 36 Seal member, 37 Connection member, 38 Current collector, 38a Through hole, 39 Detection element, X Thickness direction. [Modes for carrying out the invention]

[0035] To further clarify the purpose, technical proposal, and advantages of the embodiments of this application, the technical proposal of the embodiments of this application will be clearly described below with reference to the drawings of the embodiments of this application. Clearly, the embodiments described are some, but not all, embodiments of this application. All other embodiments obtained based on the embodiments of this application without the creative effort of a person skilled in the art are all within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as that commonly understood by those skilled in the art relating to this application. In this application, the terms used in the specification are solely for the purpose of describing specific embodiments and are not intended to limit this application. The terms “includes” and “compose,” and any variations thereof, in the description of the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. Terms such as “first,” “second,” etc., in the specification, claims, or drawings of this application are not intended to describe a particular order or subordination, but are intended to distinguish different subjects.

[0037] The “Examples” as used in this application mean that certain features, structures, or properties described in relation to the Examples may be included in at least one Example of this application. The phrase “Examples” appearing in other parts of the Specification do not necessarily all refer to the same Example, nor do they represent mutually exclusive or alternative Examples.

[0038] In the description of this application, unless otherwise explicitly stated or limited, the terms “attachment,” “connection,” “connection,” and “installation” should be understood in a broad sense, for example, that they may be fixed connections, removable connections, or integral connections, direct connections, indirect connections through an intermediate medium, or internal communication between two elements. A person skilled in the art will be able to understand the specific meaning of these terms in this application depending on the specific circumstances.

[0039] In this application, the term "and / or" is used solely to describe the relationship between related subjects, indicating that three relationships are possible. For example, C and / or D can represent three situations: C existing alone, C and D existing simultaneously, or D existing alone. In general, the character " / " in this application indicates that the related subjects before and after are in an "or" relationship.

[0040] In the embodiments of this application, the same reference numerals indicate the same component, and for the sake of brevity, detailed descriptions of the same component are omitted in different embodiments. The dimensions such as thickness, length, and width of various components in the embodiments of this application shown in the drawings, and the overall dimensions such as thickness, length, and width of the integrator, are illustrative and should be understood not to constitute any limitation to this application.

[0041] In this application, "multiple" means two or more (including two).

[0042] 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, but the embodiments of this application are not limited to these. Battery cells may be cylindrical, flattened, rectangular, or have other shapes, but the embodiments of this application are not limited to these. Battery cells are generally classified into three types according to the packaging method: columnar battery cells, prismatic battery cells, and pouch battery cells, but the embodiments of this application are not limited to these.

[0043] The batteries referred to in the embodiments of this application refer to a single physical module containing one or more battery cells to provide higher voltage and capacity. For example, the batteries referred to in this application may include battery modules or battery packs. The batteries generally include a housing for packaging one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0044] A battery cell comprises an electrode assembly and an electrolyte, the electrode assembly comprising 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 and negative electrode sheets. The positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer being coated on the surface of the positive electrode current collector. The positive electrode current collector comprises a positive electrode current collector portion and a positive electrode projection portion protruding from the positive electrode current collector portion, the positive electrode active material layer being coated on the positive electrode current collector portion, and at least a portion of the positive electrode projection portion not being coated with the positive electrode active material layer, the positive electrode projection portion being a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum. The positive electrode active material layer comprises a positive electrode active material, which may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being 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 projection protruding from the negative electrode current collecting portion, the negative electrode active material layer being coated on the negative electrode current collecting portion, and at least a portion of the negative electrode projection not being coated with the negative electrode active material layer, the negative electrode projection being a negative electrode tab. The material of the negative electrode current collector may be copper. The negative electrode active material layer includes a negative electrode active material, the negative electrode active material may be carbon or silicon, etc. To ensure that it does not melt even when a large current is passed through it, multiple positive electrode tabs are laminated and multiple negative electrode tabs are laminated. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly may be a wound type structure or a laminated type structure. The embodiments of this application are not limited thereto.

[0045] After discovering the problem of low safety performance in battery cells, the inventor conducted a systematic analysis and study of the structure and operation process of battery cells. As a result, he found that during operation, the battery cell undergoes numerous charge-discharge cycles, leading to side reactions and continuous gas generation. This creates a constant pressure inside the battery cell, which can cause deformation and structural failure. Furthermore, the electrode assembly inside the battery cell expands during the cycle, while the electrolyte inside the battery cell is continuously consumed. If these internal abnormalities during battery cell operation are not immediately detected, workers cannot take necessary countermeasures, thus significantly impacting the safety performance of the battery cell.

[0046] Based on the above-mentioned problems identified by the inventor, improvements were made to the structure of the battery cell. The technical invention described in the embodiments of this application applies to battery cells, batteries containing battery cells, and power consumption devices using batteries.

[0047] The battery cell according to the embodiment of this application includes a housing having mounting holes and electrical connection terminals that are at least partially installed in the mounting holes and installed to be insulated from the housing, and are used for information exchange between the inside and outside of the battery cell.

[0048] The battery cell according to the embodiment of this application, by installing connection terminals, enables the immediate transmission of the internal operating state of the battery cell to an external control element via the connection terminals, and the transmission of control signals from the external control element to the internal components of the battery cell, thereby facilitating information exchange between the inside and outside of the battery cell. This makes it easy to grasp the internal operating state of the battery cell in real time and to immediately transmit control signals to the inside of the battery cell, which is advantageous in improving the safety performance of the battery cell.

[0049] Power-consuming devices may include vehicles, mobile phones, portable devices, laptop computers, steamships, aerospace vehicles, electric toys, and power tools. Vehicles may be engine-driven vehicles, natural gas vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or range-extender vehicles. Aerospace vehicles include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric steamship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, hammer drills, concrete vibrators, and electric planers. The embodiments of this application are not particularly limited to the above-mentioned power-consuming devices.

[0050] In the following embodiments, for the sake of explanation, we will use a vehicle as an example of the power consumption device.

[0051] As shown in Figure 1, a battery 10 is installed inside the vehicle 1. The battery 10 may be installed at the bottom, front, or rear of the vehicle 1. The battery 10 can be used to supply power to the vehicle 1; for example, the battery 10 can serve as the operating power source for the vehicle 1.

[0052] Vehicle 1 may further include a controller 1b and a motor 1a. The controller 1b is used to control the battery 10 and supply power to the motor 1a, for example, to meet the operating power consumption needs of vehicle 1 during starting, navigation, and driving.

[0053] In some embodiments of this application, the battery 10 can be used not only as an operating power source for the vehicle 1, but also as a drive power source for the vehicle 1, supplying driving power to the vehicle 1 in place of or in part of fuel or natural gas.

[0054] As shown in Figure 2, the battery 10 includes battery cells (not shown in Figure 2). The battery 10 may further include a housing for housing the battery cells.

[0055] The housing contains the battery cells and can have various 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 joined by being placed over each other. Together with the second housing portion 12, the first housing portion 11 forms a housing space for containing the battery cells. The second housing portion 12 may be a hollow structure with one end open. The first housing portion 11 may be a plate-like structure, and the first housing portion 11 is placed over the open side of the second housing portion 12 and joined together to form a housing with a housing space. Both the first housing portion 11 and the second housing portion 12 may be hollow structures with one side open. The open side of the first housing portion 11 is placed over the open side of the second housing portion 12 and joined together to form a housing with a housing space. Of course, the first housing portion 11 and the second housing portion 12 can be of various shapes, such as a cylinder or a rectangular prism.

[0056] To improve the airtightness after the first housing portion 11 and the second housing portion 12 are connected, a sealing member such as a sealant or a sealing ring may be further installed between the first housing portion 11 and the second housing portion 12.

[0057] If the first housing portion 11 is placed over the second housing portion 12 and joined together, the first housing portion 11 may be called the upper housing and the second housing portion 12 may be called the lower housing.

[0058] In battery 10, there may be one battery cell or multiple battery cells. If there are multiple battery cells, the battery cells may be connected in series, in parallel, or in series-parallel. Series-parallel means that some of the battery cells are connected in series and others in parallel. Multiple battery cells may be directly connected in series, in parallel, or in series-parallel before the entire assembly composed of multiple battery cells is housed in the casing, or multiple battery cells may be first connected in series, in parallel, or in series-parallel to form the battery module 20. Then, multiple battery modules 20 may be connected in series, in parallel, or in series-parallel to form the whole before being housed in the casing.

[0059] In some embodiments, as shown in Figure 3, Figure 3 is a schematic diagram of the structure of the battery module 20 shown in Figure 2. The battery module 20 has multiple battery cells 30. First, multiple battery cells 30 are arranged in series, parallel, or series-parallel to form the battery module 20. Then, the multiple battery modules 20 are arranged in series, parallel, or series-parallel to form the whole, and then housed in a casing.

[0060] In some embodiments, multiple battery cells 30 in the battery module 20 are electrically connected to each other by a bus component, thereby enabling series, parallel, or series-parallel configurations of the multiple battery cells 30 in the battery module 20.

[0061] Referring to Figure 4, Figure 4 is a schematic three-dimensional exploded view of the battery cell 30 shown in Figure 3. The battery cell 30 according to the embodiment of this application includes an electrode assembly 32 and a housing 31, the housing 31 having a housing cavity 31a, and the electrode assembly 32 is housed in the housing cavity 31a.

[0062] In some embodiments, the housing 31 may include a case 311 and an end cover 312, the case 311 being a hollow structure with an opening 311a on one side, and the end cover 312 being fitted over the opening 311a of the case 311 and coupled to form a sealed connection, thereby forming a sealed space for housing the electrode assembly 32 and the electrolyte.

[0063] When assembling the battery cell 30, first the electrode assembly 32 is set inside the case 311, then the end cover 312 is placed over the opening 311a of the case 311 and joined, and then the electrolyte can be injected into the case 311 through the electrolyte inlet in the end cover 312.

[0064] In some embodiments, the housing 31 can further be used to house an electrolyte, such as an electrolyte solution. The housing 31 can have various structural forms.

[0065] Figure 4 shows a schematic diagram of the structure of a battery cell 30 according to an embodiment of this application.

[0066] Case 311 can take on various shapes, such as a cylinder or a rectangular parallelepiped. The shape of case 311 may be determined by the specific shape of the electrode assembly 32. For example, if the electrode assembly 32 has a cylindrical structure, case 311 can be selected to have a cylindrical structure. If the electrode assembly 32 has a rectangular parallelepiped structure, case 311 can be selected to have a rectangular parallelepiped structure. In Figure 4, as an example, both case 311 and the electrode assembly 32 have a rectangular parallelepiped structure.

[0067] The material of case 311 can be any of several types, such as copper, iron, aluminum, stainless steel, or aluminum alloy, but the embodiments of this application are not particularly limited to these.

[0068] The electrode assembly 32 housed within the case 311 may be one or more. In Figure 4, there are two electrode assemblies 32 housed within the case 311.

[0069] The electrode assembly 32 includes an electrode body 321 and a tab 322 extending from the end of the electrode body 321.

[0070] Figure 5 shows a front view of a battery cell according to an embodiment of this application, with some structural elements omitted, and Figure 6 shows a schematic diagram of the cross-sectional structure along line AA in Figure 5.

[0071] As shown in Figures 4, 5, and 6, the battery cell 30 according to the embodiment of this application includes a housing 31 having mounting holes 31b, and a connection terminal 33 that is at least partially installed in the mounting holes 31b and installed to be insulated from the housing 31, and is used for information exchange between the inside and outside of the battery cell 30.

[0072] The mounting hole 31b may be cylindrical, elliptical, or other irregularly shaped, depending on the specific shape of the connection terminal 33. The inner diameter of the mounting hole 31b may be constant or vary. Exemplarily, the inner wall of the mounting hole 31b may have a step.

[0073] The connection terminal 33 may be columnar, lumpy, or have other irregular shapes.

[0074] The housing 31 may have multiple walls connected to each other, and a connection terminal 33 may be installed on one surface of the housing 31, or it may be installed on different walls of the housing 31. Of course, it can be understood that one connection terminal 33 may be installed on one wall of the housing 31, or multiple connection terminals 33 may be installed.

[0075] The mounting hole 31b may optionally be installed through the housing 31. All of the connection terminals 33 may be located within the mounting hole 31b, or some of the connection terminals 33 may be installed within the mounting hole 31b, as long as the connection terminals 33 can electrically connect the relevant elements inside and outside the battery cell 30.

[0076] The connection terminal 33 may be an optical fiber, cable, or conductive structure, and the connection terminal 33 has the function of transmitting optical signals or electrical signals, and by using optical signals and electrical signals as the medium of information, the connection terminal 33 can have the function of transmitting information as part of an information transmission path.

[0077] The information transmitted via the connection terminal 33 can be selected to be the operating status inside the battery cell 30, which may be at least one of the following: pressure, temperature, and gas content, or a control signal transmitted to the internal elements of the battery cell 30 by an external control element of the battery cell 30.

[0078] Selectively, the connection terminal 33 can transmit information from outside the battery cell 30, such as control signals from the control element of the battery 10, into the battery cell 30. For example, by connecting the lithium replenishment member inside the battery 10 to the control element outside the battery cell 30, the control element transmits control signals to the lithium replenishment member inside the battery cell 30 via the connection terminal 33, and further causes the lithium replenishment member to immediately release lithium ions or lithium particles, thereby ensuring the normal operation of the battery cell 30.

[0079] Selectively, information from inside the battery cell 30, such as the internal pressure and temperature of the battery cell 30, can be transmitted to the outside of the battery cell 30 via the connection terminal 33. For example, the connection terminal 33 can connect a pressure sensor inside the battery cell 30 to a control element outside the battery cell 30. The pressure sensor transmits the detected internal pressure information of the battery cell 30 to the control element via the connection terminal 33, making it easier for the control element to determine whether the pressure in the battery cell 30 is likely to be too high, and to control the operation of related elements, thereby eliminating the risk of excessively high internal pressure in the battery cell 30.

[0080] Depending on the form of the signal that the connection terminal 33 intends to transmit, the connection terminal 33 may be connected to a conductor, optical fiber, or cable. For example, the connection terminal 33 can be electrically connected to an external control element of the battery cell 30 via a conductor, or to an internal element such as a sensor of the battery cell 30 via a cable.

[0081] In the embodiment of this application, the battery cell 30 is installed such that the housing 31 has mounting holes 31b, and the connection terminals 33 are installed at least partially within the mounting holes 31b. This enables information exchange between the inside and outside of the battery cell 30, allowing information such as the operating status inside the battery cell 30 to be transmitted to the outside of the battery cell 30, or information such as control signals from the outside of the battery cell 30 to be transmitted to the inside of the battery cell 30. This facilitates information exchange between related elements inside the battery cell 30 and related elements outside the battery cell 30, ensuring the normal operation of the battery cell 30 and contributing to improved safety performance of the battery cell 30.

[0082] Figure 7 shows a front view of another battery cell with some structural elements omitted, Figure 8 is a schematic diagram of the cross-sectional structure along line BB in Figure 7, and Figure 9 is a schematic diagram of the exploded view of Figure 7.

[0083] As shown in Figures 7 to 9, in some embodiments, multiple mounting holes 31b are installed at intervals, and a connection terminal 33 is installed in each mounting hole 31b.

[0084] Generally, a battery cell 30 needs to transmit multiple types of information, such as temperature, pressure, and gas components, and some of this information needs to be transmitted simultaneously through multiple wires. Therefore, by installing the battery cell 30 to have multiple connection terminals 33 spaced apart, information transmission between the inside and outside of the battery cell 30 can be easily achieved, and the function of simultaneously transmitting multiple types of information between the inside and outside of the battery cell 30 can also be easily realized.

[0085] To achieve insulation between the connection terminal 33 and the housing 31, an insulating member may be separately installed between the connection terminal 33 and the housing 31, or the connection terminal 33 itself may be installed to include an insulating member.

[0086] In some embodiments, the battery cell 30 further includes an insulating member 34 that is at least partially installed between the connection terminal 33 and the inner wall of the mounting hole 31b.

[0087] The insulating member 34 may be installed so that a portion of it is located between the inner wall of the mounting hole 31b and the connection terminal 33, or the entire insulating member 34 may be installed so that it is located between the inner wall of the mounting hole 31b and the connection terminal 33.

[0088] The insulating member 34 may optionally be tubular and positioned between the electrode assembly 32, the connection terminal 33, and the inner wall of the mounting hole 31b. Alternatively, the insulating member 34 may include an annular portion and an annular projection with the end of the annular portion projecting outward, wherein the annular portion is positioned between the inner wall of the mounting hole 31b and the connection terminal 33, and the projection is positioned on the surface of the housing 31, thereby restricting the position of the insulating member 34.

[0089] Therefore, by installing the insulating member 34, mutual insulation can be achieved between the connection terminal 33 and the housing 31, enabling more accurate and rapid information transmission from the connection terminal 33.

[0090] As shown in Figures 5 and 6, in some embodiments, a groove 34a is formed on one of the connection terminal 33 and the insulating member 34, and a projection 33a is formed on the other, and the groove 34a and the projection 33a are engaged with each other.

[0091] The groove 34a and projection 33a may be provided in an annular shape encircling the connection terminal 33, or they may be provided in a fan-shaped annular shape that is part of the annular shape. In either case, the relative positions of the connection terminal 33 and the insulating member 34 can be restricted.

[0092] The connection terminal 33 may be installed so that a groove 34a is formed on it and a projection 33a is formed on the insulating member 34, or the connection terminal 33 may be installed so that a projection 33a is formed on it and a groove 34a is formed on the insulating member 34.

[0093] The engagement between the groove 34a and the projection 33a restricts the position of the connection terminal 33 and the insulating member 34, reducing the risk of them rattling relative to each other.

[0094] Continuing to refer to Figures 5 and 6, in some embodiments, an annular projection 33a is formed on the circumferential surface of the connection terminal 33, and an annular groove 34a is formed on the inner wall of the insulating member 34.

[0095] Generally, the size of the connection terminal 33 is relatively small, and by installing the projection 33a on the connection terminal 33, the processing of the connection terminal 33 becomes easier. Since both the projection 33a and the groove 34a are installed in an annular shape, the positional regulating effect of the projection 33a and groove 34a on the connection terminal 33 and the insulating member 34 is improved. Furthermore, because the projection 33a and groove 34a are annular, they can engage at any position along the circumferential direction of the projection 33a and groove 34a, which is advantageous in reducing the difficulty of assembling the connection terminal 33 and the insulating member 34.

[0096] The protrusion height of the projection 33a from the surface of the connection terminal 33 is not limited and can be selected as needed.

[0097] In some embodiments, the protrusion distance h1 of the projection 33a from the circumferential surface of the connection terminal 33 satisfies h1 ≥ 0.1 mm.

[0098] For example, the protrusion distance h1 of the projection 33a from the circumferential surface of the connection terminal 33 may be 0.1 mm, 0.2 mm, 0.5 mm, or 1 mm, and can be selected as needed.

[0099] It can be understood that the protrusion height of the projection 33a from the peripheral surface of the connection terminal 33 is advantageous in securing the mutual engagement area between the projection 33a and the groove 34a, and is also advantageous in securing the mutual positional regulating effect between the connection terminal 33 and the insulating member 34, provided that the above relationship is satisfied.

[0100] A single protrusion 33a may be formed on a single connection terminal 33, or multiple protrusions 33a may be formed on a single connection terminal 33 at intervals from each other.

[0101] In some embodiments, the connection terminal 33 is formed with a plurality of projections 33a spaced apart, and the distance L between adjacent projections 33a satisfies L ≥ 0.1 mm.

[0102] For example, L could be 0.1 mm, 0.2 mm, 0.5 mm, or 1 mm, but can be selected as needed.

[0103] The multiple protrusions 33a may be installed at intervals along the axial direction of the mounting hole 31b, and the connection terminal 33 is installed such that multiple protrusions 33a are formed at intervals, which is advantageous in further securing the mutual engagement area between the protrusions 33a and the groove 34a, and further securing the mutual positional restricting effect between the connection terminal 33 and the insulating member 34. The multiple protrusions 33a may be installed at equal intervals along the axial direction of the mounting hole 31b, or they may be installed at any appropriate interval, but are not limited thereto, and can be selected as needed.

[0104] By setting the adjacent protrusions 33a such that the spacing L between them satisfies the above relationship, the processing of the protrusions 33a and grooves 34a becomes easier, and it is also advantageous to further improve the positional regulating effect between the connection terminal 33 and the insulating member 34 due to the engagement of the protrusions 33a and grooves 34a.

[0105] In some embodiments, the housing 31 includes a first wall 313, and the mounting hole 31b is installed through the first wall 313.

[0106] Selectively, the first wall 313 may be part of the case 311, or the first wall 313 may be part of the end cover 312. Alternatively, the first wall 313 may include part of both the case 311 and the end cover 312, i.e., both the case 311 and the end cover 312 may have mounting holes 31b. Specifically, it can be installed as needed.

[0107] The mounting hole 31b may be cylindrical, elliptical, or have other shapes, and can be installed according to the shape of the connection terminal 33. The installation of the connection terminal 33 is facilitated by installing the mounting hole 31b so as to penetrate the first wall 313.

[0108] In some embodiments, the battery cell 30 further includes electrode terminals 35 provided on the first wall 313, which are used to transmit electrical energy and are spaced apart from the connection terminals 33.

[0109] The electrode terminal 35 can be electrically connected to the tab 322 of the electrode assembly 32 inside the battery cell 30 in order to transmit electrical energy. Alternatively, the electrode terminal 35 can be electrically connected by a wire to the lithium replenishment material inside the battery 10, thereby transmitting electrical energy to the lithium replenishment material at the appropriate time and causing the lithium replenishment material to release lithium or lithium ions.

[0110] The electrode terminals 35 are installed with a gap between them and the connection terminals 33, thereby reducing the risk of electrical conductivity between the two and affecting the normal operation of the battery cell 30.

[0111] The electrical connection terminals 33 or electrode terminals 35 may be provided protruding from the surface of the housing 31, and the connection terminals 33 are usually connected to an external control element by a wire. Therefore, the connection terminals 33, electrode terminals 35, and wires occupy extra space outside a portion of the housing 31. By providing both the connection terminals 33 and electrode terminals 35 on the first wall 313, the external space of the battery cells 30 that is extraly occupied to provide the connection terminals 33 and electrode terminals 35 can be reduced, facilitating the grouping of the battery cells 30 into the battery 10, and reducing the volume of the battery 10 with the grouped battery cells 30, thereby improving the energy density of the battery 10.

[0112] In some embodiments, the distance that the connection terminal 33 protrudes from the first wall 313 along the thickness direction X of the first wall 313 is less than or equal to the distance that the electrode terminal 35 protrudes from the same side of the first wall 313.

[0113] This compares the distances that the connection terminal 33 and the electrode terminal 35 protrude from the first wall 313 along the same side in the thickness direction X of the first wall 313. The connection terminal 33 and electrode terminal 35 on the same side of the first wall 313, along the thickness direction X of the first wall 313, are installed so as to protrude from the first wall 313, and the distance by which the connection terminal 33 protrudes from the first wall 313 is less than or equal to the distance by which the electrode terminal 35 on the same side of the first wall 313 protrudes from the first wall 313.

[0114] The distance at which the connection terminal 33 protrudes from the first wall 313 is the distance between the end face of the connection terminal 33 along the thickness direction X and the first wall 313. Similarly, the distance at which the electrode terminal 35 protrudes from the first wall 313 is the distance between the end face of the electrode terminal 35 along the thickness direction X and the first wall 313.

[0115] In this way, the connection terminals 33 are installed so that they do not protrude from the electrode terminals 35 on either side in the thickness direction of the first wall 313. By installing the connection terminals 33 in this manner, the extra space along the thickness direction X outside the battery cell 30 that is occupied is reduced, and after grouping the battery cells 30, the internal volume of the battery 10 occupied by the battery cells 30 is reduced, which is advantageous for improving the energy density of the battery.

[0116] Figure 10 shows a front view of another battery cell according to the embodiment of this application, with some structural elements omitted. Figure 11 shows a schematic diagram of the cross-sectional structure along line CC in Figure 10, and Figure 12 shows a schematic diagram of the exploded structure of Figure 10.

[0117] As shown in Figures 7 to 12, in some embodiments, the battery cell 30 further includes a sealing member 36 that is at least partially in contact between the first wall 313 and the connection terminal 33 along the thickness direction X of the first wall 313.

[0118] The connection terminal 33 is installed so as to have a sealing surface that is positioned opposite a part of the first wall 313, and the sealing member 36 is installed between the first wall 313 and the sealing surface of the connection terminal 33, thereby achieving airtight sealing between the inside and outside of the housing 31.

[0119] The sealing member 36 may be provided inside the mounting hole 31b, or it may be provided outside the mounting hole 31b. For example, the sealing member 36 may be located on the side of the first wall 313 away from the housing cavity 31a, or it may be located on the side of the first wall 313 closer to the housing cavity 31a.

[0120] Installing the sealing member 36 is advantageous for sealing the cavity 31a housing the battery cell 30, reducing the risk of external impurities entering the battery cell 30 and corroding it, and reducing the risk of electrolyte leakage from inside the battery cell 30.

[0121] As shown in Figures 10 to 12, in some embodiments, the battery cell 30 further includes a connecting member 37 located on the circumferential side of the insulating member 34 and connected to the first wall 313.

[0122] The connecting member 37 can be optionally connected to the first wall 313 by welding, crimping, adhesive, or other means. By installing the connecting member 37 and then installing it on the periphery of the insulating member 34, during the manufacturing of the battery cell 30, the connecting terminal 33 can first be connected to the connecting member 37 from the insulating member 34, and then the connecting member 37 can be connected to the first wall 313. Exemplarily, the connecting member 37, the insulating member 34, and the connecting terminal 33 are formed by an injection molding process.

[0123] Thus, this is advantageous in improving the connection strength between the connection terminal 33 and the insulating member 34, makes it easier to install the connection terminal 33, and simplifies the assembly process of the connecting member 37.

[0124] In some embodiments, the connecting member 37 and the housing 31 are welded together. This arrangement is advantageous in further improving the connection stability between the connecting terminal 33 and the housing 31.

[0125] In some embodiments, the insulating member 34 is injection molded to connect the fixing member and the connecting terminal 33.

[0126] In this way, after the connecting member 37 and the connecting terminal 33 are manufactured and molded, high-temperature fluid plastic is injected between them, and after the fluid plastic cools, the insulating member 34 is formed, thereby achieving an insulating connection between the connecting member 37 and the connecting terminal 33. Then, the connecting member 37 is welded to the first wall 313.

[0127] Thus, this is advantageous for simplifying the manufacturing process of the battery cell 30 and also advantageous for improving the connection strength between the connection terminal 33 and the first wall 313.

[0128] As shown in Figures 7 to 9, in some embodiments, the connection terminal 33 includes a first sub-part 331 and a second sub-part 332 connected to each other, and the first wall 313 is provided between the first sub-part 331 and the second sub-part 332.

[0129] The first sub-part 331 and the second sub-part 332 may be connected by welding, crimping, or screw connections, as selectable.

[0130] In an embodiment in which the battery cell 30 includes a sealing member 36, the sealing member 36 may be provided between the first sub-part 331 and the first wall 313, or between the second sub-part 332 and the first wall 313. Specifically, this can be selected as needed.

[0131] Selectively, the first sub-part 331 and the second sub-part 332 may be installed such that one of them has a projection provided in the mounting hole 31b, and the projection connects to the other of the first sub-part 331 and the second sub-part 332. Alternatively, both the first sub-part 331 and the second sub-part 332 may be installed such that they both have projections provided in the mounting hole 31b, and the first sub-part 331 and the second sub-part 332 are connected by the projections.

[0132] The connection terminal 33 includes a first sub-part 331 and a second sub-part 332, and by installing the first wall 313 between the first sub-part 331 and the second sub-part 332, the connection between the connection terminal 33 and the first wall 313 can be easily achieved.

[0133] In some embodiments, the first sub-part 331 and the second sub-part 332 are connected by crimping.

[0134] Specifically, the first sub-part 331 and the second sub-part 332 are installed such that one of them is equipped with a crimping boss and the other is equipped with a crimping hole. The crimping boss is then passed through the crimping hole and positioned inside the crimping hole, and then the crimping boss is punched out to crimp the crimping boss and the crimping hole together.

[0135] This configuration is advantageous for improving the connection strength between the first sub-section 331 and the second sub-section 332, and also for simplifying the connection process between the first sub-section 331 and the second sub-section 332.

[0136] Figure 13 shows a front view of another battery cell 30 according to an embodiment of this application, with some structural elements omitted; Figure 14 shows a schematic diagram of the cross-sectional structure along line DD in Figure 13; and Figures 15 and 16 are enlarged views of a different embodiment at point E in Figure 14.

[0137] As shown in Figures 13 to 16, in some embodiments, the housing 31 includes a first wall 313 and electrode terminals 35 mounted on the first wall 313, the electrode terminals 35 being used to transmit electrical energy and being mounted in isolation from the first wall 313, a mounting hole 31b being provided to penetrate the electrode terminals 35 along the thickness direction X of the first wall 313, and a connection terminal 33 being connected to the electrode terminals 35.

[0138] The electrode terminal 35 may be electrically connected to the tab 322 of the electrode assembly 32 inside the battery cell 30, or the electrode terminal 35 may be electrically connected by a wire to the lithium replenishment member inside the battery cell 30. This can be selected as needed.

[0139] The mounting hole 31b is installed through the electrode terminal 35, and the connection terminal 33 is connected to the electrode terminal 35, which is advantageous in saving space on the first wall 313, facilitating the installation of other components on the first wall 313, and is advantageous in a rational arrangement of each component of the battery cell 30.

[0140] As shown in Figure 14, in some embodiments, the battery cell 30 includes a current collector 38 and an electrode assembly 32, the current collector 38 and the electrode assembly 32 housed in a housing 31, the current collector 38 electrically connects the electrode assembly 32 and the electrode terminals 35, and the current collector 38 has a through hole 38a. The connection terminal 33 is installed through the through hole 38a, or the battery cell 30 further includes a connecting wire that passes through the through hole 38a and is electrically connected to the connection terminal 33.

[0141] The connection terminal 33 is typically electrically connected to an element such as a sensor inside the battery cell 30 by a wire such as a cable. By installing the current collector 38 to have a through hole 38a, and passing the connection terminal 33 through the through hole 38a, or passing a connecting wire through the through hole 38a, the connection terminal 33 or the wire can be passed through the current collector 38 and connected to each other.

[0142] With this configuration, even when the current collector 38 covers the electrode terminal 35, an electrical connection can be established between the connection terminal 33 and the internal elements of the battery cell 30, making it easier for the connection terminal 33 to transmit information.

[0143] As shown in Figure 4, in some embodiments, the battery cell 30 further includes a detection element 39, which is installed in a housing cavity 31a and used to detect the operating status of the battery cell 30, and the detection element 39 and the connection terminal 33 are electrically connected.

[0144] Selectively, the detection element 39 may be a sensor used to detect information such as the internal pressure, temperature, or gas components of the battery cell 30. The connection terminal 33 transmits this information to an external control element or other element of the battery cell 30, which then immediately adjusts the relevant operating parameters according to the operating status of the battery cell 30, thereby ensuring the normal operation of the battery cell 30.

[0145] Therefore, by installing the battery cell 30 to include the detection element 39, it is advantageous to ensure the normal operation of the battery cell 30 by detecting the operating status of the battery cell 30 using the detection element 39, thereby improving the safety performance of the battery cell 30.

[0146] In some embodiments, the detection element 39 includes a sensor.

[0147] Selectively, the detection element 39 may be at least one of a pressure sensor, a temperature sensor, a gas component detection sensor, or a stress sensor. The pressure sensor, temperature sensor, gas component detection sensor, and stress sensor are used to detect operating parameters such as the atmospheric pressure inside the battery cell 30, the temperature of the associated structure, the gas component content inside the battery cell 30, and the internal stress of associated components, such as the electrode assembly 32, respectively. The above operating parameters are transmitted to an external control element or the like via the connection terminal 33 to enable information exchange between the inside and outside of the battery cell 30. The control element determines whether the transmitted operating parameters are within the normal operating range, and if there is an abnormality, it immediately adjusts the associated operating parameters to further ensure the normal operation of the battery cell 30 and improve the safety performance of the battery cell 30.

[0148] The battery 10 according to the embodiment of this application includes a battery cell 30 according to any of the embodiments described above.

[0149] Since the battery 10 according to the embodiment of this application uses the battery cell 30 according to any of the embodiments described above, it has the same technical effects and will not be explained again here.

[0150] In some embodiments, the battery 10 is electrically connected to the connection terminal 33 and further includes a control element for transmitting information to the connection terminal 33.

[0151] Selectively, the control element transmits information such as control signals to the connection terminal 33, which then transmits this information to the relevant components inside the battery cell 30, or transmits information such as internal pressure, temperature, stress, and gas composition of the battery cell 30 to the control element via the connection terminal 33, thereby facilitating the control element to determine the operating status of the battery cell 30 and adjust the operating parameters by controlling the relevant components, or facilitating the operator to adjust the operating parameters of the battery 10 by issuing an alarm.

[0152] Therefore, by installing the battery 10 to include a control element, it is advantageous to further ensure the normal operation of the battery 10 and to improve the safety performance of the battery 10.

[0153] The power consumption device according to the embodiment of this application includes a battery 10 for supplying electrical energy according to any of the embodiments described above.

[0154] Since the power consumption device according to the embodiment of this application uses the battery 10 according to any of the embodiments described above, it has the same technical effect and will not be explained again here.

[0155] Furthermore, the embodiments and features described herein can be combined with each other, as long as they do not contradict each other.

[0156] Finally, the above embodiments are merely for illustrative purposes and not to limit the technical proposal of this application. Although this application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical proposals described in each of the above embodiments or substitute some of their technical features, but should understand that such modifications or substitutions will not cause the essence of the corresponding technical proposal to deviate from the spirit and scope of the technical proposal of each embodiment of this application.

Claims

1. It is a battery cell, A housing with mounting holes, It includes, at least partially, a connection terminal installed in the mounting hole and positioned to be insulated from the housing, and used for information exchange between the inside and outside of the battery cell, The housing includes a first wall, The aforementioned mounting hole is installed by penetrating the first wall. The connection terminal includes a first sub-part and a second sub-part connected to each other, and the first wall is provided between the first sub-part and the second sub-part. Battery cell.

2. Multiple mounting holes are provided at intervals, and the connection terminals are installed in each of the mounting holes. The battery cell according to claim 1.

3. The further includes an insulating member at least partially installed between the connection terminal and the inner wall of the mounting hole, The battery cell according to claim 1 or 2.

4. A groove is formed in one of the connection terminal and the insulating member, and a projection is formed in the other, and the groove and the projection are engaged with each other. The battery cell according to claim 3.

5. The annular projection is formed on the circumferential surface of the connection terminal, and the annular groove is formed on the inner wall of the insulating member. The battery cell according to claim 4.

6. The protrusion distance h1 of the projection from the peripheral surface of the connection terminal satisfies h1 ≥ 0.1 mm. The battery cell according to claim 4 or 5.

7. The connection terminal has a plurality of protrusions that are spaced apart, and the distance L between two adjacent protrusions satisfies L ≥ 0.1 mm. A battery cell according to any one of claims 4 to 6.

8. The electrode terminals provided on the first wall further include The electrode terminals transmit electrical energy and are installed at a distance from the connection terminals. A battery cell according to any one of claims 1 to 7.

9. Along the thickness direction of the first wall, the distance the connecting terminal protrudes from the first wall is less than or equal to the distance the electrode terminal protrudes from the same side of the first wall. The battery cell according to claim 8.

10. The seal member further includes a sealing member that is at least partially in contact with the first wall and the connection terminal along the thickness direction of the first wall, A battery cell according to any one of claims 1 to 9.

11. The insulating member is located on the circumferential side and further includes a connecting member connected to the first wall, The battery cell according to claim 3.

12. The connecting member is welded to the housing. The battery cell according to claim 11.

13. The insulating member is injection molded to connect the connecting member and the connecting terminal. The battery cell according to claim 11 or 12.

14. The first sub-part and the second sub-part are connected by crimping. A battery cell according to any one of claims 1 to 13.

15. The housing has a housing cavity, The system further includes a detection element installed within the housing cavity, which detects the operating status of the battery cell and is electrically connected to the connection terminal, A battery cell according to any one of claims 1 to 14.

16. The detection element includes a sensor, The battery cell according to claim 15.

17. A battery comprising the battery cell according to any one of claims 1 to 16.

18. The battery according to claim 17, further comprising a control unit electrically connected to the connection terminal and used for information transmission with the connection terminal.

19. A power consumption device comprising a battery according to claim 17 or 18 for supplying electrical energy.

20. A battery cell, A housing with mounting holes, It includes, at least partially, a connection terminal installed in the mounting hole and positioned to be insulated from the housing, and used for information exchange between the inside and outside of the battery cell, The housing includes a first wall and electrode terminals installed on the first wall, The electrode terminals are installed to transmit electrical energy and to insulate from the first wall. The mounting hole is installed so as to penetrate the electrode terminal along the thickness direction of the first wall, The aforementioned connection terminal is connected to the electrode terminal. Battery cell.

21. A plurality of mounting holes are set at intervals, and the connection terminal is installed in each of the mounting holes. The battery cell according to claim 20.

22. Further comprising an insulating member at least partially installed between the connection terminal and the inner wall of the mounting hole, The battery cell according to claim 20 or 21.

23. A groove is formed in one of the connection terminal and the insulating member, and a projection is formed in the other, and the groove and the projection are engaged with each other. The battery cell according to claim 22.

24. The annular projection is formed on the circumferential surface of the connection terminal, and the annular groove is formed on the inner wall of the insulating member. The battery cell according to claim 23.

25. The distance h1 of the projection from the circumferential surface of the connection terminal is such that h1 ≥ 0.1 mm The battery cell according to claim 23 or 24.

26. The connection terminal has a plurality of protrusions that are spaced apart, and the distance L between two adjacent protrusions satisfies L ≥ 0.1 mm. A battery cell according to any one of claims 23 to 25.

27. Further including a current collector and an electrode assembly, The current collector and the electrode assembly are housed within the housing. The current collector electrically connects the electrode assembly and the electrode terminals. The current collector is provided with a through hole, The aforementioned connection terminal is installed through the through hole, or the battery cell further includes a connecting wire that passes through the through hole and is electrically connected to the connection terminal. A battery cell according to any one of claims 20 to 26.

28. The housing has a housing cavity, The system further includes a detection element installed within the housing cavity, which detects the operating status of the battery cell and is electrically connected to the connection terminal, A battery cell according to any one of claims 20 to 27.

29. The detection element includes a sensor, The battery cell according to claim 28.

30. A battery comprising a battery cell according to any one of claims 20 to 29.

31. The battery according to claim 30, further comprising a control unit electrically connected to the connection terminal and used for information transmission with the connection terminal.

32. A power consumption device comprising a battery according to claim 30 or 31 for supplying electrical energy.

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