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

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

[0003] In the development of battery cell technology, in addition to improving the performance of the battery cells, safety issues have become an issue that cannot be ignored. Therefore, how to improve the safety performance of battery cells is a technical issue that is being continuously improved in battery cell technology. Summary of the Invention

[0004] The present application provides a battery cell, a battery, and a power consuming device that are advantageous in improving 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 mounting hole, and a connection terminal at least partially installed in the mounting hole and installed so as to be insulated from the housing, the connection terminal being used for information exchange between the inside and outside of the battery cell.

[0006] In the battery cell according to the embodiments of the present application, the housing is installed with mounting holes and the connection terminals are at least partially installed within the mounting holes, thereby realizing information exchange between the inside and outside of the battery cell and transmitting information such as the internal operating status of 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, facilitating information exchange between related elements inside the battery cell and related elements outside the battery cell, thereby ensuring normal operation of the battery cell and being advantageous for improving the safety performance of the battery cell.

[0007] In some embodiments, a plurality of spaced apart mounting holes are provided, with a connection terminal disposed within each mounting hole.

[0008] By installing the battery cell in this manner, information can be easily transmitted between the inside and outside of the battery cell, and a function of simultaneously transmitting multiple types of information between the inside and outside of the battery cell can also be easily achieved.

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

[0010] In this way, the connection terminals and the housing can be insulated from each other, and information can be transmitted from the connection terminals more accurately and quickly.

[0011] In some embodiments, a groove is formed on one of the connection terminal and the insulating member, and a protrusion is formed on the other, and the groove and the protrusion are engaged with each other. The engagement between the groove and the protrusion realizes positional regulation of the connection terminal and the insulating member, and reduces the risk of the connection terminal and the insulating member rattling with each other.

[0012] In some embodiments, an annular protrusion is formed on the peripheral surface of the connection terminal, and an annular groove is formed on the inner wall of the insulating member, which improves the positional regulation between the connection terminal and the insulating member by the protrusion and the 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 peripheral surface of the connection terminal satisfies h1 ≥ 0.1 mm, which is advantageous in securing a mutual engagement area between the projection and the groove, and is also advantageous in securing a mutual positional regulation action between the connection terminal and the insulating member.

[0014] In some embodiments, the connection terminal is formed with a plurality of protrusions spaced apart, and the distance L between two adjacent protrusions satisfies L≧0.1 mm. The connection terminal is arranged to have a plurality of protrusions spaced apart, which is advantageous in further ensuring the mutual engagement area between the protrusions and the grooves and further ensuring the mutual positioning function between the connection terminal and the insulating member. The distance L between adjacent protrusions is arranged to satisfy the above relationship, which makes it easier to process the protrusions and the grooves and is also advantageous in further improving the positioning function between the connection terminal and the insulating member due to the engagement between the protrusions and the grooves.

[0015] In some embodiments, the housing includes a first wall and the mounting holes are disposed through the first wall. Disposing the mounting holes through the first wall facilitates attachment of the connection terminals.

[0016] In some embodiments, the battery cell further includes an electrode terminal provided on the first wall, the electrode terminal transmits electrical energy and is provided at a distance from the connection terminal. By providing the electrode terminal at a distance from the connection terminal, the risk of electrical conduction between the electrode terminal and the connection terminal, which affects normal operation of the battery cell, is reduced. Furthermore, by providing both the electrode terminal and the connection terminal on the first wall, the external space of the battery cell that is occupied by the connection terminal and the electrode terminal can be reduced, making it easier to group the battery cells into a battery, and reducing the volume of the battery formed by grouping the battery cells, thereby improving the energy density of the battery.

[0017] In some embodiments, the distance that the connection terminal protrudes from the first wall along the thickness direction of the first wall is equal to or less than the distance that the electrode terminal protrudes from the same side of the first wall, thus reducing the extra space along the thickness direction of the exterior of the battery cell occupied by the installation of the connection terminal, and reducing the volume inside the battery occupied by the battery cells after grouping the battery cells, which is favorable for improving the energy density of the battery.

[0018] In some embodiments, the battery cell further includes a sealing member at least partially abutted between the first wall and the connection terminal along a thickness direction of the first wall, which is advantageous for sealing the receiving cavity of the battery cell, reducing the risk of external impurities entering the inside of the battery cell and corroding the battery cell, and reducing the risk of electrolyte leakage inside the battery cell.

[0019] In some embodiments, the battery cell further includes a connection member located on the periphery of the insulating member and connected to the first wall, which is advantageous in improving the connection strength between the connection terminal and the insulating member, facilitating the attachment of the connection terminal, and simplifying the assembly process of the connection member.

[0020] In some embodiments, the connection member is welded to the housing, which is advantageous in that it further improves the connection stability between the connection terminal and the first wall.

[0021] In some embodiments, the insulating member is injection molded to connect the connecting member and the connecting terminal, which 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 connection terminal includes a first sub-portion and a second sub-portion connected to each other, and the first wall is disposed between the first sub-portion and the second sub-portion, such that connection between the connection terminal and the first wall is facilitated.

[0023] In some embodiments, the first sub-part and the second sub-part are connected by crimping, which is advantageous in improving the connection strength between the first sub-part and the second sub-part and in simplifying the process of connecting the first sub-part and the second sub-part.

[0024] In some embodiments, the housing includes a first wall and an electrode terminal disposed on the first wall, the electrode terminal is disposed to transmit electrical energy and insulate from the first wall, the mounting hole is disposed to penetrate the electrode terminal along the thickness direction of the first wall, and the connection terminal is connected to the electrode terminal, which is advantageous in saving space on the first wall, facilitating the installation of other members on the first wall, and advantageous in rationally arranging each member of the battery cell.

[0025] In some embodiments, the battery cell further includes a current collector and an electrode assembly, the current collector and the electrode assembly are accommodated in a housing, the current collector electrically connects the electrode assembly and the electrode terminal, the current collector has a through hole, and the connection terminal is installed through the through hole, or the battery cell further includes a connection wire that penetrates the through hole and is electrically connected to the connection terminal. In this way, even if the current collector covers the electrode terminal, an electrical connection between the connection terminal and an element inside the battery cell can be realized, and the connection terminal can easily transmit information.

[0026] In some embodiments, the battery cell further includes a detection element disposed in the receiving cavity for detecting an operating condition of the battery cell and electrically connected to the connecting terminal. The battery cell is disposed to include the detection element, which can detect the operating condition of the battery cell through the detection element, thereby ensuring the normal operation of the battery cell and improving the safety performance of the battery cell.

[0027] In some embodiments, the detection element includes a sensor, which can further ensure the normal operation of the battery cell and improve the safety performance of the battery cell.

[0028] In a second aspect, embodiments of the present application provide a battery comprising a battery cell according to any of the embodiments of the first aspect.

[0029] 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 effect, and will not be described again here.

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

[0031] The control element transmits information such as a control signal to the connection terminal, and transmits it to related execution components inside the battery cell through the connection terminal, or transmits information such as pressure, temperature, stress, and gas composition inside the battery cell to the control element through the connection terminal, so that the control element judges the operating status of the battery cell, and facilitates the control element to control related elements to adjust operating parameters, or the control element issues an alarm to facilitate the operator to adjust the operating parameters of the battery, which is advantageous to further ensure the normal operation of the battery and to improve the safety performance of the battery.

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

[0033] The power consuming 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 effect, which will not be described again here. [Brief description of the drawings]

[0034] In order to more clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required in 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 any creative effort. [Figure 1] 1 is a schematic diagram of a vehicle structure according to an embodiment of the present application; [Diagram 2] FIG. 2 is an exploded schematic diagram of a battery according to an embodiment of the present application. [Diagram 3] FIG. 2 is a schematic diagram of the structure of a battery module in a battery according to an embodiment of the present application. [Figure 4] FIG. 2 is an exploded schematic diagram of a battery cell according to an embodiment of the present application. [Diagram 5] FIG. 2 is a front view of a battery cell according to an embodiment of the present application with a portion of the structure thereof omitted. [Figure 6] FIG. 6 is a schematic diagram of a cross-sectional structure taken along line AA in FIG. 5. [Figure 7] FIG. 11 is a front view of another battery cell according to an embodiment of the present application with a portion of the structure omitted. [Figure 8] 8 is a schematic diagram of a cross-sectional structure taken along line BB in FIG. 7. [Figure 9] FIG. 8 is a schematic diagram of the exploded structure of FIG. 7. [Figure 10] FIG. 13 is a front view of yet another battery cell with some structure omitted according to an embodiment of the present application. [Figure 11] 11 is a schematic diagram of a cross-sectional structure taken along line CC in FIG. 10. [Figure 12] FIG. 11 is a schematic diagram of the exploded structure of FIG. [Figure 13] FIG. 11 is a front view of another battery cell according to an embodiment of the present application with a portion of the structure thereof omitted. [Figure 14] FIG. 14 is a schematic diagram of a cross-sectional structure taken along line DD in FIG. [Figure 15] 15 is a partial enlarged view of a portion E in FIG. 14. [Figure 16]Another enlarged view of the E portion in FIG. 14. In the drawings, the drawings are not drawn to scale. Reference numerals: 1 vehicle, 1a motor, 1b controller, 10 battery, 11 first housing part, 12 second housing part, 20 battery module, 30 battery cell, 31 housing, 31a receiving 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 protrusion, 34 insulating member, 34a recess, 35 electrode terminal, 36 seal member, 37 connection member, 38 current collector, 38a through hole, 39 detection element, X thickness direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] In order to clarify the purpose, technical solutions and advantages of the embodiments of the present application, the technical solutions in the embodiments of the present application are described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained based on the embodiments of the present application without the need for creative efforts by those skilled in the art are within the scope of protection of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art of this application. In this application, the terms used in the specification of the application are only for describing specific embodiments and are not intended to limit the application. The terms "comprise" and "comprise" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are not intended to describe a specific order or subordinate relationship, but are intended to distinguish different objects.

[0037] An "embodiment" referred to in this application means that a particular feature, structure, or characteristic described with respect to the embodiment may be included in at least one embodiment of this application. The appearances of the phrase in various places in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments of other embodiments.

[0038] In the description of this application, unless otherwise clearly specified or limited, the terms "attached", "connected", "connected" and "attached" should be understood in a broad sense, for example, may be a fixed connection, a removable connection, or an integral connection, may be a direct connection, may be an indirect connection through an intermediate medium, or may be communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific situation.

[0039] The term "and / or" in this application is only for describing the related relationship of related objects, and indicates that three relationships can exist, for example, C and / or D can indicate three situations: C exists alone, C and D exist simultaneously, and D exists alone. Note that the character " / " in this application generally indicates that the related objects before and after are in an "or" relationship.

[0040] In the embodiments of the present application, the same reference numerals indicate the same elements, and for the sake of brevity, detailed descriptions of the same elements will be omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various elements in the embodiments of the present application shown in the drawings, and the overall thickness, length, width, and other dimensions of the integrated device are merely illustrative and should not constitute any limitations on the present application.

[0041] As used in this application, "plurality" means two or more (including two).

[0042] In the present application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, etc., but the embodiments of the present application are not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shape, but the embodiments of the present application are not limited thereto. Battery cells are generally divided into three types according to packaging manners: a prismatic battery cell, a rectangular battery cell, and a pouch battery cell, but the embodiments of the present application are not limited thereto.

[0043] The battery referred to in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack. The battery generally includes a housing for packaging one or more battery cells. The housing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0044] The 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 is operated mainly by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is applied to the surface of the positive electrode collector. The positive electrode collector includes a positive electrode collector and a positive electrode protruding portion protruding from the positive electrode collector, and the positive electrode collector is coated with the positive electrode active material layer, and at least a portion of the positive electrode protruding portion is not coated with the positive electrode active material layer, and the positive electrode protruding portion is a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode collector may be aluminum. The positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is applied to the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode current collector and a negative electrode protruding portion protruding from the negative electrode current collector. The negative electrode current collector is coated with the negative electrode active material layer, and at least a portion of the negative electrode protruding portion is not coated with the negative electrode active material layer, and the negative electrode protruding portion is 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, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that the electrode assembly does not melt even when a large current is applied, the positive electrode tabs are stacked in multiple layers, and the negative electrode tabs are stacked in multiple layers. The material of the separator may be PP (polypropylene), PE (polyethylene), etc. In addition, the electrode assembly may have a wound structure or a stacked structure. The embodiment of the present application is not limited thereto.

[0045] After finding the problem of the low safety performance of the battery cell, the inventors conducted systematic analysis and research into the structure and operation process of the battery cell, and found that, during the operation of the battery cell, the charge and discharge cycles are repeated many times, and side reactions and gas generation continue, resulting in a certain air pressure inside the battery cell, which may cause deformation of the battery cell and damage to the structural strength. In addition, the electrode assembly in the battery cell will expand during the cycle period, while the electrolyte inside the battery cell will continue to be consumed. If these internal abnormal phenomena occurring during the operation of the battery cell are not immediately discovered, workers will not be able to take necessary measures, which will have a serious impact on the safety performance of the battery cell.

[0046] Based on the above problems found by the inventors, improvements have been made to the structure of the battery cell. 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.

[0047] A battery cell according to an embodiment of the present application includes a housing having a mounting hole, and an electrical connection terminal at least partially installed in the mounting hole, installed so as to be insulated from the housing, and used for information exchange between the inside and outside of the battery cell.

[0048] By providing connection terminals in the battery cell according to the embodiments of the present application, the internal operating state of the battery cell can be immediately transmitted to an external control element via the connection terminals, and a control signal from the external control element can be transmitted to an executive component inside the battery cell, thereby enabling information exchange between the inside and outside of the battery cell, making it easy to grasp the internal operating state of the battery cell in real time and to immediately transmit a control signal to the inside of the battery cell, which is advantageous for improving the safety performance of the battery cell.

[0049] The power consumption device may be a vehicle, a mobile phone, a portable device, a notebook computer, a steamer, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be an engine-driven vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. The spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc. The electric toy may include a stationary or mobile electric toy, such as a game console, an electric car toy, an electric steamer toy, and an electric airplane toy, etc. The electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, a hammer drill, a concrete vibrator, and an electric planer, etc. In the embodiment of the present application, there is no particular limitation on the power consumption device.

[0050] In the following embodiment, for convenience of explanation, the power consuming device will be described as a vehicle.

[0051] 1, a battery 10 is installed inside a vehicle 1. The battery 10 may be installed at the bottom, head, or tail of the vehicle 1. The battery 10 may be used to supply power to the vehicle 1, for example, the battery 10 may be an operating power source for the vehicle 1.

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

[0053] In some embodiments of the present 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, and can provide drive power to the vehicle 1 in place of or in part in place 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 accommodates the battery cells and may 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 covered and coupled to each other. The first housing portion 11 and the second housing portion 12 form an accommodation space for accommodating the battery cells. The second housing portion 12 may have a hollow structure with one end open. The first housing portion 11 has a plate-like structure, and the first housing portion 11 is covered and coupled to the opening side of the second housing portion 12 to form a housing with an accommodation space. The first housing portion 11 and the second housing portion 12 may both have a hollow structure with one end open. The opening side of the first housing portion 11 is covered and coupled to the opening side of the second housing portion 12 to form a housing with an accommodation space. Of course, the first housing portion 11 and the second housing portion 12 can have various shapes, for example, a cylindrical body or a rectangular parallelepiped.

[0056] In order to improve the sealing performance after the first housing part 11 and the second housing part 12 are connected, a sealing member such as a sealant or a seal ring may be further installed between the first housing part 11 and the second housing part 12.

[0057] If the first housing part 11 is placed over and coupled to the second housing part 12, the first housing part 11 may be called the upper housing and the second housing part 12 may be called the lower housing.

[0058] The battery 10 may have one or more battery cells. When there are multiple battery cells, the multiple battery cells may be connected in series, in parallel, or in series-parallel. "Series-parallel" means that some of the multiple battery cells are connected in series and some are connected in parallel. The multiple battery cells may be directly connected in series, in parallel, or in series-parallel, and then the entire battery cell configuration may be housed in a housing, or the multiple battery cells may first be connected in series, in parallel, or in series-parallel to form a battery module 20. The multiple battery modules 20 are then connected in series, in parallel, or in series-parallel to form the entire battery module, and then housed in a housing.

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

[0060] In some embodiments, the multiple battery cells 30 in the battery module 20 are electrically connected to each other by a bus member, so that the multiple battery cells 30 in the battery module 20 can be connected in series, parallel, or series-parallel.

[0061] 4, which is an exploded schematic diagram of the battery cell 30 shown in FIG 3. The battery cell 30 according to the embodiment of the present application includes an electrode assembly 32 and a housing 31, the housing 31 has an accommodating cavity 31a, and the electrode assembly 32 is accommodated in the accommodating cavity 31a.

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

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

[0064] In some embodiments, the housing 31 can further be used to contain an electrolyte, such as an electrolyte solution. The housing 31 can be in a variety of configurations.

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

[0066] The case 311 may have various shapes such as a cylinder, a rectangular parallelepiped, etc. The shape of the case 311 may be determined according to 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, by way of example.

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

[0068] There may be one or more electrode assemblies 32 housed in the case 311. In Fig. 4, there are two electrode assemblies 32 housed in the case 311.

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

[0070] FIG. 5 shows a front view of a battery cell according to an embodiment of the present application with a portion of the structure omitted, and FIG. 6 shows a schematic diagram of the cross-sectional structure taken along line AA in FIG.

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

[0072] Optionally, the mounting hole 31b may be cylindrical, elliptical cylindrical, or other irregular shapes, and may be provided according to the specific shape of the connection terminal 33. The inner diameter of the mounting hole 31b may be constant or may vary. For example, the inner wall of the mounting hole 31b has a step.

[0073] The connection terminals 33 may be pillar-shaped, block-shaped, or have other irregular shapes.

[0074] The housing 31 may have a plurality of walls connected to each other, and the connection terminals 33 may be provided on one surface of the housing 31, or the connection terminals 33 may be provided on different walls of the housing 31. Of course, it is understood that one wall of the housing 31 may have one or more connection terminals 33 provided thereon.

[0075] Optionally, the mounting holes 31b may be disposed so as to penetrate the housing 31. The entire connecting terminals 33 may be located within the mounting holes 31b, or only a portion of the connecting terminals 33 may be disposed within the mounting holes 31b, as long as the connecting terminals 33 can electrically connect related elements inside and outside the battery cell 30.

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

[0077] Optionally, the information transmitted by the connection terminal 33 may be at least one of the internal operating conditions of the battery cell 30, such as pressure, temperature, and gas content, or a control signal transmitted by a control element external to the battery cell 30 to an element internal to the battery cell 30.

[0078] Optionally, information from the outside of the battery cell 30, such as a control signal from a control element of the battery 10, can be transmitted to the inside of the battery cell 30 through the connection terminal 33. Exemplarily, the connection terminal 33 connects a lithium refill member inside the battery 10 to a control element outside the battery cell 30, so that the control element can transmit a control signal to the lithium refill member inside the battery cell 30 through the connection terminal 33, and further cause the lithium refill member to immediately release lithium ions or elemental lithium, thereby ensuring normal operation of the battery cell 30.

[0079] Optionally, information about the inside of the battery cell 30, such as the air pressure and temperature inside the battery cell 30, can be transmitted to the outside of the battery cell 30 via the connection terminal 33. Exemplarily, 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 information about the detected pressure inside 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 for the control element to control the operation of related elements, thereby eliminating the risk of the pressure inside the battery cell 30 being too high.

[0080] Depending on the type of signal to be transmitted by the connection terminal 33, a conductor, an optical fiber, a cable, or the like may be connected to the connection terminal 33. For example, the connection terminal 33 may be electrically connected to a control element outside the battery cell 30 via a conductor and electrically connected to an element such as a sensor inside the battery cell 30 via a cable.

[0081] In the battery cell 30 according to the embodiment of the present application, the housing 31 is installed so as to have a mounting hole 31b, and the connection terminal 33 is at least partially installed within the mounting hole 31b, thereby realizing information exchange between the inside and outside of the battery cell 30 and transmitting information such as the internal operating status of the battery cell 30 to the outside of the battery cell 30, or transmitting information such as control signals from the outside of the battery cell 30 to the inside of the battery cell 30. This makes it easy to exchange information between related elements inside the battery cell 30 and related elements outside the battery cell 30, ensures normal operation of the battery cell 30, and is advantageous for improving the safety performance of the battery cell 30.

[0082] FIG. 7 shows a front view of another battery cell with part of the structure omitted, FIG. 8 is a schematic diagram of a cross-sectional structure taken along line BB in FIG. 7, and FIG. 9 is a schematic diagram of the exploded three-dimensional structure of FIG.

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

[0084] Generally, the battery cell 30 needs to transmit multiple types of information such as temperature, pressure, and gas composition, and some information needs to be transmitted simultaneously through multiple conductors. Therefore, by arranging the battery cell 30 to have multiple connection terminals 33 spaced apart from each other, information transmission between the inside and outside of the battery cell 30 can be easily realized, 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] Optionally, in order to achieve insulation between the connection terminal 33 and the housing 31, a separate insulating member may be installed between the connection terminal 33 and the housing 31, or the connection terminal 33 itself may be installed so as to have an insulating member.

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

[0087] Alternatively, a portion of the insulating member 34 may be positioned between the inner wall of the mounting hole 31b and the connection terminal 33, or the entire insulating member 34 may be positioned between the inner wall of the mounting hole 31b and the connection terminal 33.

[0088] Alternatively, the insulating member 34 may be tubular and is located 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 protruding portion whose end protrudes outward, where the annular portion is located between the inner wall of the mounting hole 31b and the connection terminal 33, and the protruding portion is located on the surface on the housing 31 side, thereby restricting the position of the insulating member 34.

[0089] Therefore, by providing the insulating member 34, it is possible to insulate the connection terminal 33 from the housing 31, and information can be transmitted from the connection terminal 33 more accurately and quickly.

[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 protrusion 33a is formed on the other, and the groove 34a and the protrusion 33a are engaged with each other.

[0091] Alternatively, the groove 34a and the protrusion 33a may be provided in a ring shape so as to go around the connection terminal 33, or in a sector-shaped ring shape that is a part of the ring. Either of these can realize the relative positional regulation of the connection terminal 33 and the insulating member 34.

[0092] Alternatively, the connection terminal 33 may be provided with a groove 34a and the insulating member 34 may be provided with a protrusion 33a. Alternatively, the connection terminal 33 may be provided with a protrusion 33a and the insulating member 34 may be provided with a groove 34a.

[0093] The engagement between the recessed groove 34a and the projection 33a realizes positional regulation of the connection terminal 33 and the insulating member 34, reducing the risk of the two rattling relative to each other.

[0094] Continuing to refer to FIGS. 5 and 6, in some embodiments, the peripheral surface of the connection terminal 33 is formed with an annular protrusion 33a, and the inner wall of the insulating member 34 is formed with an annular recess 34a.

[0095] Generally, the size of the connection terminal 33 is relatively small, and providing the protrusion 33a on the connection terminal 33 makes it easy to process the connection terminal 33. Protrusion 33a and groove 34a are both provided in an annular shape, which improves the effect of positioning the connection terminal 33 and the insulating member 34 by the protrusion 33a and groove 34a, and because the protrusion 33a and groove 34a are annular, they can engage with each other at any position along the circumferential direction of the protrusion 33a and groove 34a, which is advantageous in reducing the difficulty of assembling the connection terminal 33 and the insulating member 34.

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

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

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

[0099] It can be understood that the protruding height of the protrusion 33a from the peripheral surface of the connecting terminal 33 satisfying the above relationship is advantageous for ensuring the mutual engagement area between the protrusion 33a and the groove 34a, and is also advantageous for ensuring the mutual positional control function between the connecting terminal 33 and the insulating member 34.

[0100] One connection terminal 33 may have one protrusion 33a formed thereon, or one connection terminal 33 may have a plurality of protrusions 33a formed thereon at intervals.

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

[0102] For example, L may be 0.1 mm, 0.2 mm, 0.5 mm, or 1 mm, and may be selected as needed.

[0103] The multiple protrusions 33a may be arranged at intervals along the axial direction of the mounting hole 31b, and the connecting terminal 33 is arranged so as to form multiple protrusions 33a arranged at intervals, which is advantageous in further ensuring the mutual engagement area between the protrusions 33a and the grooves 34a and further ensuring the mutual positional control function between the connecting terminal 33 and the insulating member 34. The multiple protrusions 33a may be equally spaced along the axial direction of the mounting hole 31b, or may be spaced apart at any suitable interval, which is not limited here and can be selected as needed.

[0104] By setting the spacing L between adjacent protrusions 33a so that it satisfies the above relationship, it becomes easier to process the protrusions 33a and the grooves 34a, and it is also advantageous in further improving the positional control effect between the connection terminals 33 and the insulating member 34 by the engagement between the protrusions 33a and the grooves 34a.

[0105] In some embodiments, the housing 31 includes a first wall 313 and the mounting holes 31 b are disposed through the first wall 313 .

[0106] Selectively, the first wall 313 may be a part of the case 311, or the first wall 313 may be a part of the end cover 312. Or, the first wall 313 includes a part of the case 311 and a part of the end cover 312, that is, the mounting holes 31b are provided in both the case 311 and the end cover 312. Specifically, they can be provided as needed.

[0107] The mounting hole 31b may be cylindrical, elliptical cylindrical, or another shape, and can be specifically provided according to the shape of the connection terminal 33. By providing the mounting hole 31b so as to penetrate the first wall 313, the connection terminal 33 can be easily attached.

[0108] In some embodiments, the battery cell 30 further includes an electrode terminal 35 provided on the first wall 313, the electrode terminal 35 being used for transmitting electrical energy and spaced apart from the connection terminal 33.

[0109] The electrode terminal 35 can be electrically connected to the tab 322 of the electrode assembly 32 inside the battery cell 30 to transmit electrical energy. Alternatively, the electrode terminal 35 can be electrically connected to a lithium supplementary member or the like inside the battery 10 via a conductor to transmit electrical energy to the lithium supplementary member at an appropriate time and cause the lithium supplementary member to release elemental lithium or lithium ions.

[0110] The electrode terminal 35 is disposed at a distance from the connection terminal 33, thereby reducing the risk of electrical conduction between the two and affecting 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 conductors, so that the connection terminals 33, electrode terminals 35, and conductors occupy extra space outside part of the housing 31. By providing both the connection terminals 33 and the electrode terminals 35 on the first wall 313, the extra external space of the battery cell 30 occupied by the connection terminals 33 and electrode terminals 35 can be reduced, making it easier to group the battery cells 30 into a battery 10, and reducing the volume of the battery 10 formed by grouping the battery cells 30, thereby improving the energy density of the battery 10.

[0112] In some embodiments, along the thickness direction X of the first wall 313, the distance that the connection terminal 33 protrudes from 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] It should be noted that this is a comparison of the distances that the connection terminal 33 and the electrode terminal 35 protrude from the first wall 313 along the same side of the first wall 313 in the thickness direction X. The connection terminal 33 and the electrode terminal 35 on the same side of the first wall 313 along the thickness direction X of the first wall 313 are each 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 that the connection terminal 33 protrudes from the first wall 313 is the distance between the end face of the connection terminal 33 in the thickness direction X and the first wall 313. Similarly, the distance that the electrode terminal 35 protrudes from the first wall 313 is the distance between the end face of the electrode terminal 35 in the thickness direction X and the first wall 313.

[0115] In this manner, the connection terminals 33 are installed so as not to protrude from the electrode terminals 35 on either side in the thickness direction of the first wall 313. In this manner, the extra space in the thickness direction X outside the battery cells 30 occupied by the installation of the connection terminals 33 is reduced, and after the battery cells 30 are grouped, 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] Fig. 10 shows a front view of another battery cell according to an embodiment of the present application with a portion of the structure omitted, Fig. 11 shows a schematic diagram of a cross-sectional structure taken along line CC in Fig. 10, and Fig. 12 shows a schematic diagram of the exploded structure in Fig. 10.

[0117] As shown in FIGS. 7 to 12 , in some embodiments, the battery cell 30 further includes a seal member 36 at least partially abutted 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 arranged so as to have a sealing surface arranged opposite a portion of the first wall 313, and a sealing member 36 is arranged between the first wall 313 and the sealing surface of the connection terminal 33, thereby achieving sealing between the inside and the outside of the housing 31.

[0119] Alternatively, the seal member 36 may be disposed within the mounting hole 31b, or the seal member 36 may be disposed outside the mounting hole 31b. Exemplarily, the seal member 36 may be disposed on a side of the first wall 313 that is away from the receiving cavity 31a, or the seal member 36 may be disposed on a side of the first wall 313 that is closer to the receiving cavity 31a.

[0120] The installation of the sealing member 36 is advantageous in sealing the accommodating cavity 31a of the battery cell 30, reducing the risk of external impurities penetrating into the interior of the battery cell 30 and corroding the battery cell 30, and reducing the risk of electrolyte leakage inside the battery cell 30.

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

[0122] Optionally, the connection member 37 can be connected to the first wall 313 by welding, crimping, adhesive, etc. By installing the connection member 37 and then installing the connection member 37 on the peripheral side of the insulating member 34, during the manufacture of the battery cell 30, the connection terminal 33 can be first connected to the connection member 37 through the insulating member 34, and then the connection member 37 can be connected to the first wall 313. Exemplarily, the connection member 37, the insulating member 34, and the connection terminal 33 are molded by an injection molding process.

[0123] This is advantageous in improving the connection strength between the connection terminal 33 and the insulating member 34, making it easier to attach the connection terminal 33, and simplifying the assembly process of the connection member 37.

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

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

[0126] In this way, the connection member 37 and the connection terminal 33 are manufactured and molded respectively, and then hot fluid plastic is injected between them, and after the fluid plastic is cooled, the insulating member 34 is formed, thereby realizing an insulating connection between the connection member 37 and the connection terminal 33. Then, the connection member 37 is welded to the first wall 313.

[0127] This is advantageous for simplifying the manufacturing process of the battery cell 30 and 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-portion 331 and a second sub-portion 332 connected to each other, and the first wall 313 is provided between the first sub-portion 331 and the second sub-portion 332.

[0129] Optionally, the first sub-part 331 and the second sub-part 332 may be connected by welding, crimping, or threading.

[0130] In an embodiment in which the battery cell 30 includes the sealing member 36, the sealing member 36 may be provided between the first sub-portion 331 and the first wall 313, or the sealing member 36 may be provided between the second sub-portion 332 and the first wall 313. Specifically, the sealing member 36 may be selected according to need.

[0131] Alternatively, one of the first sub-part 331 and the second sub-part 332 may be provided with a protrusion that is disposed within the mounting hole 31b, and the protrusion may be configured to connect to the other of the first sub-part 331 and the second sub-part 332. Alternatively, the first sub-part 331 and the second sub-part 332 may be provided with a protrusion that is disposed within the mounting hole 31b, and the first sub-part 331 and the second sub-part 332 may be configured to connect to each other via the protrusion.

[0132] The connection terminal 33 includes a first sub-portion 331 and a second sub-portion 332, and the first wall 313 is disposed between the first sub-portion 331 and the second sub-portion 332, thereby easily achieving connection between the connection terminal 33 and the first wall 313.

[0133] In some embodiments, the first sub-portion 331 and the second sub-portion 332 are crimped together.

[0134] Specifically, one of the first sub-part 331 and the second sub-part 332 is installed so that it has a crimping boss and the other has a crimping hole, and the crimping boss is passed through the crimping hole and placed inside the crimping hole, and then the crimping boss and the crimping hole are crimped together by punching out the crimping boss.

[0135] Such an arrangement is advantageous for improving the connection strength between the first sub-part 331 and the second sub-part 332, and is also advantageous for simplifying the process of connecting the first sub-part 331 and the second sub-part 332.

[0136] FIG. 13 shows a front view of another battery cell 30 according to an embodiment of the present application with some of the structure omitted, FIG. 14 shows a schematic diagram of the cross-sectional structure along line DD in FIG. 13, and FIGS. 15 and 16 are partial enlarged views of point E in FIG. 14 of different embodiments.

[0137] As shown in FIGS. 13 to 16 , in some embodiments, the housing 31 includes a first wall 313 and an electrode terminal 35 disposed on the first wall 313, the electrode terminal 35 is used to transmit electric energy and is disposed so as to be insulated from the first wall 313, the mounting hole 31b is disposed so as to penetrate the electrode terminal 35 along the thickness direction X of the first wall 313, and the connection terminal 33 is connected to the electrode terminal 35.

[0138] Alternatively, 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 to a lithium refill member inside the battery cell 30 via a conductor. Selection can be made as needed.

[0139] The mounting hole 31b is installed to pass through the electrode terminal 35 and connects the connection terminal 33 to the electrode terminal 35, which is advantageous for saving space in the first wall 313, makes it easier to install other components on the first wall 313, and is advantageous for rationally arranging each component of the battery cell 30.

[0140] 14, in some embodiments, a battery cell 30 includes a current collector 38 and an electrode assembly 32, the current collector 38 and the electrode assembly 32 are accommodated in a housing 31, the current collector 38 electrically connects the electrode assembly 32 and an electrode terminal 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 connection wire electrically connected to the connection terminal 33 through the through hole 38a.

[0141] The connection terminal 33 is usually electrically connected to an element such as a sensor inside the battery cell 30 by a conductor such as a cable. The current collector 38 is installed so as to have a through hole 38a, and the connection terminal 33 is provided through the through hole 38a, or a connection conductor is provided through the through hole 38a, so that the connection terminal 33 or the conductor can be passed through the current collector 38 to connect them to each other.

[0142] By installing it in this manner, even if the current collector 38 covers the electrode terminal 35, electrical connection can be achieved between the connection terminal 33 and the elements inside the battery cell 30, making it easier for the connection terminal 33 to transmit information.

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

[0144] Optionally, the detection element 39 may be a sensor used to detect information such as pressure, temperature, or gas composition inside the battery cell 30. The information is transmitted to an element such as a control element outside the battery cell 30 via the connection terminal 33, so that the element such as the control element immediately adjusts related operating parameters according to the operating status of the battery cell 30 to ensure the normal operation of the battery cell 30.

[0145] Therefore, by installing the battery cell 30 so that it includes the detection element 39, it is advantageous to use the detection element 39 to detect the operating status of the battery cell 30, thereby ensuring normal operation of the battery cell 30 and improving the safety performance of the battery cell 30.

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

[0147] Optionally, 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, the temperature sensor, the gas component detection sensor, and the stress sensor are respectively used to detect operating parameters such as the air pressure inside the battery cell 30, the temperature of related structures, the content of gas components inside the battery cell 30, and the internal stress of related members, such as the electrode assembly 32. The above operating parameters are transmitted to a control element, etc., outside the battery cell 30 through the connection terminal 33 to realize information exchange between the inside and outside of the battery cell 30. The control element determines whether the transmitted operating parameters are within a normal operating range, and if there is an abnormality, immediately adjusts the related operating parameters, thereby further ensuring the normal operation of the battery cell 30 and improving the safety performance of the battery cell 30.

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

[0149] 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 has the same technical effect, and will not be described again here.

[0150] In some embodiments, battery 10 further includes a control element electrically connected to connection terminal 33 for communicating information with connection terminal 33 .

[0151] Optionally, the control element transmits information such as a control signal to the connection terminal 33, and then to related executing components inside the battery cell 30 via the connection terminal 33; or transmits information such as pressure, temperature, stress, gas components, etc. inside the battery cell 30 to the control element via the connection terminal 33, so that the control element can determine the operating status of the battery cell 30 and facilitate the control element to control related elements to adjust operating parameters, or the control element can issue an alarm to facilitate the operator to adjust the operating parameters of the battery 10.

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

[0153] A power consuming device according to an embodiment of the present application includes a battery 10 for supplying electrical energy according to any of the embodiments described above.

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

[0155] In addition, unless contradictory, the embodiments and features in the embodiments in this application can be combined with each other.

[0156] Finally, the above examples are only for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above examples, those skilled in the art may still modify the technical solutions described in the above examples or substitute some of the technical features equivalently, but it should be understood that these modifications and substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell, a housing having a mounting hole; a connection terminal at least partially disposed in the mounting hole and insulated from the housing, the connection terminal being used for information exchange between the inside and the outside of the battery cell; Battery cell.

2. A plurality of the mounting holes are provided at intervals, and the connection terminal is provided in each of the mounting holes. The battery cell according to claim 1 .

3. and further comprising an insulating member at least partially disposed between the connection terminal and an 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 protrusion is formed in the other, and the groove and the protrusion are engaged with each other; The battery cell according to claim 3 .

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

6. a protruding distance h1 of the protrusion 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 is formed with a plurality of the projections arranged at intervals, and the distance L between two adjacent projections satisfies L≧0.1 mm. The battery cell according to any one of claims 4 to 6.

8. The housing includes a first wall; The mounting hole is disposed through the first wall. The battery cell according to any one of claims 1 to 7.

9. further comprising an electrode terminal provided on the first wall; The electrode terminal transmits electrical energy and is disposed at a distance from the connection terminal. The battery cell of claim 8 .

10. a distance that the connection terminal protrudes from the first wall along a thickness direction of the first wall is equal to or less than a distance that the electrode terminal protrudes from the same side of the first wall; The battery cell of claim 9 .

11. a sealing member at least partially abutted between the first wall and the connection terminal along a thickness direction of the first wall; The battery cell according to any one of claims 8 to 10.

12. a connecting member located on a peripheral side of the insulating member and connected to the first wall; The battery cell according to any one of claims 8 to 11.

13. The connecting member is welded to the housing. The battery cell of claim 12.

14. The insulating member is injection molded and connects the connection member and the connection terminal.

14. The battery cell according to claim 12 or 13.

15. the connection terminal includes a first sub-portion and a second sub-portion connected to each other, and the first wall is provided between the first sub-portion and the second sub-portion; The battery cell according to any one of claims 8 to 14.

16. The first sub-portion and the second sub-portion are connected by crimping. The battery cell of claim 15.

17. the housing includes a first wall and an electrode terminal disposed on the first wall; The electrode terminal is disposed to transmit electrical energy and to be insulated from the first wall; The mounting hole is disposed so as to penetrate the electrode terminal along a thickness direction of the first wall, The connection terminal is connected to the electrode terminal. The battery cell according to any one of claims 1 to 7.

18. Further comprising a current collector and an electrode assembly; the current collector and the electrode assembly are contained within the housing; the current collector electrically connects the electrode assembly and the electrode terminal; The current collector has a through hole, The connection terminal is installed through the through hole, or the battery cell further includes a connection wire that passes through the through hole and is electrically connected to the connection terminal.

20. The battery cell of claim 17.

19. a detection element disposed in the receiving cavity for detecting an operating state of the battery cell and electrically connected to the connection terminal; 19. A battery cell according to any one of claims 1 to 18.

20. The detection element includes a sensor.

20. The battery cell of claim 19.

21. A battery comprising a battery cell according to any one of claims 1 to 20.

22. The battery of claim 21 , further comprising a control unit electrically connected to the connection terminals and used for communicating with the connection terminals.

23. 23. A power consuming device comprising a battery according to any one of claims 20 to 22 for supplying electrical energy thereto.

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