Battery cell, battery, power consumption device, method for manufacturing a battery cell, and equipment

Abstract

The present application relates to a battery cell, a battery, a power consumption device, a manufacturing method and an apparatus for a battery cell, and relates to the battery field. The present application provides a battery cell, which includes a housing including a wall, an electrode terminal insulated and attached to the wall, an electrode assembly installed in the housing and including a body and a first tab, the first tab being formed at an end close to the wall of the body, a current collecting part installed between the electrode assembly and the wall for connecting the first tab and the electrode terminal, and a heat shrink film at least partially covering a side of the current collecting part facing the wall to insulate and separate the current collecting part from the wall. The battery cell of the present application has a relatively high safety.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular, to battery cells, batteries, power consumption devices, manufacturing methods and equipment for battery cells.

Background Art

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

[0003] In the development of battery technology, in addition to improving the performance of batteries, safety issues are also one of the problems that cannot be ignored. If the safety of the battery cannot be guaranteed, this battery cannot be used. Therefore, how to enhance the safety of the battery is one of the urgent technical problems to be solved in battery technology.

Summary of the Invention

[0004] The object of this application is to provide a battery cell, a battery, a power consumption device, a manufacturing method and equipment for a battery cell. This battery cell has relatively high safety.

[0005] According to a first aspect, this application provides a battery cell, which includes a housing including a wall portion, an electrode terminal mounted insulatingly with respect to the wall portion, and an electrode assembly installed in the housing and including a main body and a first tab, wherein the first tab is formed at an end of the main body close to the wall portion, a current collecting component installed between the first tab and the wall portion for connecting the first tab and the electrode terminal, and a first insulating member installed between the current collecting component and the wall portion for insulatingly isolating the current collecting component and the wall portion. Here, a protrusion is formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in the thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collecting component.

[0006] For the battery cell of the present application, by forming a protrusion on the side of the first insulating member facing the current collecting component, in the process of incorporating the electrode assembly into the housing, the protrusion can limit the warpage towards the wall of the current collecting component, thereby restricting the deformation towards the wall of the electrode assembly, preventing short circuits and thermal runaway in the battery cell due to the occurrence of displacement between the electrode plates of the electrode assembly, and improving the safety of the battery cell.

[0007] In some embodiments of the present application, the current collecting component includes a central portion and a peripheral portion, the projection of the electrode terminal on the current collecting component is located in the central portion, and the projection of the protrusion on the current collecting component is located in the peripheral portion.

[0008] In the above solution, in the process of incorporating the electrode assembly into the housing, the electrode terminal can abut against the central portion, and the protrusion can abut against the peripheral portion, thereby providing a stopper and support for the peripheral portion and restricting the warpage towards the wall of the peripheral portion, restricting short circuits and thermal runaway in the battery cell due to the occurrence of displacement between the electrode plates of the outer ring of the electrode assembly, and improving the safety of the battery cell.

[0009] In some embodiments of the present application, the minimum distance from the protrusion to the outer peripheral surface of the current collecting component in the radial direction of the electrode terminal is smaller than the minimum distance from the protrusion to the outer peripheral surface of the electrode terminal.

[0010] In the above solution, since the probability of displacement occurring in the electrode plates of the outer ring of the electrode assembly is high and the amount of displacement is large, by installing the protrusion relatively close to the outer peripheral surface of the current collecting component and relatively far from the outer peripheral surface of the electrode terminal, the protrusion can be made to provide a stopper and support for the electrode plate that is relatively far from the electrode terminal, i.e., the electrode plate of the outer ring, reducing the probability of occurrence of displacement of the electrode plate of the outer ring, preventing short circuits and thermal runaway in the battery cell due to the displacement of the electrode plate of the outer ring, and improving the safety of the battery cell.

[0011] In some embodiments of the present application, there is a gap between the protrusion and the current collecting component along the thickness direction of the wall portion.

[0012] In the above solution, since the electrode terminal needs to be in contact with the current collecting component to achieve electrical connection, by providing a certain gap between the protrusion and the current collecting component, it is avoided that the protrusion causes interference in the connection between the electrode terminal and the current collecting component, and the stability of the electrical connection between the electrode terminal and the current collecting component is guaranteed.

[0013] In some embodiments of the present application, the protrusion is an annular protrusion installed around the central axis of the electrode terminal, or the number of the protrusions is plural, and the plural protrusions are distributed at intervals around the central axis of the electrode terminal.

[0014] In the above solution, the stopper and supporting functions exerted by the annular protrusion on the electrode plate and the separator on the outer ring of the electrode assembly are relatively uniform, and it is difficult for the problem of electrode plate displacement to occur at local positions. By the form in which a plurality of protrusions are distributed at intervals around the central axis of the electrode terminal, the material of the first insulating member is reduced, and the forming difficulty of the first insulating member is reduced.

[0015] In some embodiments of the present application, the battery cell further includes an insulating film, and the insulating film covers the outer peripheral surfaces of the first tab and the main body and extends to between the protrusion and the current collecting component.

[0016] In the above solution, by covering the outer peripheral surfaces of the first tab and the main body with the insulating film, the insulating film insulates and separates between the first tab and the main body and the housing, plays an isolation role, reduces the short-circuit probability between the first tab and the main body and the housing, further reduces the short-circuit risk of the battery cell, and improves the safety of the battery cell. At the same time, the insulating film extends to between the protrusion and the current collecting component, enables the protrusion and the current collecting component to be able to crimp the insulating film, prevents the insulating film from moving, and improves the stability of the insulating film covering the current collecting component, the first tab and the main body.

[0017] In some embodiments of the present application, the housing includes a case and an end cap. The case includes a bottom wall and side walls. The side walls are disposed around the bottom wall. One end of the side walls is connected to the bottom wall, and the other end of the side walls surrounds to form an opening facing the bottom wall. The end cap covers the opening, and the wall portion is the bottom wall or the end cap.

[0018] In the above solution, the bottom wall and the side walls define a space for accommodating the electrode assembly, the electrolyte and other structures, and the end cap covers the opening surrounded by the side walls to ensure the sealing performance of the housing.

[0019] In some embodiments of the present application, the electrode assembly further includes a second tab. The second tab is formed at an end away from the wall portion of the main body. The second tab has a polarity opposite to that of the first tab, and the second tab is electrically connected to the wall portion.

[0020] In the above solution, the first tab and the second tab are located at both ends of the electrode assembly. There is relatively good insulation between the first tab and the second tab, which reduces the risk of short circuit of the battery cell and improves the safety of the battery cell.

[0021] According to a second aspect, the present application provides a battery, which includes the above battery cell.

[0022] According to a third aspect, the present application provides a power consumption device, which includes the above battery, and the battery is used to provide electrical energy.

[0023] According to a fourth aspect, the present application provides a method for manufacturing a battery cell, the method comprising: supplying a housing and an electrode terminal, wherein the housing includes a wall portion and the electrode terminal is attached to the wall portion in an insulated manner; supplying an electrode assembly, wherein the electrode assembly includes a body and a first tab, and the first tab is formed at an end of the body close to the wall portion; supplying a current collecting component; supplying a first insulating member, wherein a protrusion is formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in a thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collecting component; connecting the current collecting component to the first tab, installing the first insulating member on the wall portion, and separating the protrusion from the wall portion; placing the electrode assembly into the housing; and connecting the current collecting component to the electrode terminal.

[0024] According to a fifth aspect, the present application provides manufacturing equipment for a battery cell, the equipment comprising: a first supply device for supplying a housing and an electrode terminal, wherein the housing includes a wall portion and the electrode terminal is attached to the wall portion in an insulated manner; a second supply device for supplying an electrode assembly, wherein the electrode assembly includes a body and a first tab, and the first tab is formed at an end of the body close to the wall portion; a third supply device for supplying a current collecting component; a fourth supply device for supplying a first insulating member, wherein a protrusion is formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in a thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collecting component; and an assembling device for connecting the current collecting component to the first tab, installing the first insulating member on the wall portion, separating the protrusion from the wall portion, placing the electrode assembly into the housing, and connecting the current collecting component to the electrode terminal.

Brief Description of the Drawings

[0025] To more clearly explain the technical solution of the embodiments of this application, the following briefly introduces the drawings that need to be used in the embodiments of this application. It goes without saying that the drawings described below merely show some embodiments of this application, and those skilled in the art can also obtain other drawings based on these drawings on the premise of not exerting creative efforts.

[0026]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Modes for Carrying Out the Invention

[0027] Hereinafter, the embodiments of the present application will be described in more detail while combining the drawings and embodiments. Hereinafter, the detailed description of the embodiments and the drawings are for exemplarily explaining the principle of the present application, but not for limiting the scope of the present application. That is, the present application is not limited to the described embodiments.

[0028] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more. The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of description and simplification of the description of the present application, and does not indicate or imply that the mentioned device or element must have a specific orientation and be configured and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present application. It should be noted that terms such as "first", "second", "third", etc. are only used for the purpose of description and should not be understood as indicating or implying relative importance. "Vertical" is not strictly vertical but within the allowable error range. "Parallel" is not strictly parallel but within the allowable error range.

[0029] The terms indicating orientation appearing in the following description are all in the directions shown in the figures and do not limit the specific structure of the present application. In the description of the present application, it should be further noted that unless specifically defined and limited, the terms "attachment", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. It may be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0030] In the present application, the mentioned battery refers to a single physical module including one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc.

[0031] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode plate, a negative electrode plate, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the positive electrode active material layer coated protrudes from the positive electrode current collector with the positive electrode active material layer coated, and the positive electrode current collector without the positive electrode active material layer coated is used as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer coated protrudes from the negative electrode current collector with the negative electrode active material layer coated, and the negative electrode current collector without the negative electrode active material layer coated is used as the negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. To ensure that it does not blow out even when a large current flows, the number of positive electrode tabs is plural and laminated, and the number of negative electrode tabs is plural and laminated. The material of the separator may be PP (Polypropylene), PE (Polyethylene), or the like.

[0032] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage power system devices such as hydraulic power, thermal power, wind power, and solar power plants, but also widely used in multiple fields such as electric transportation devices such as electric bicycles, electric motorcycles, and electric vehicles, as well as military equipment and aerospace. As the application fields of power batteries continue to expand, the market demand for them also continues to increase.

[0033] In the process of incorporating the electrode assembly into the housing, the inventor noticed that in the process of incorporating the electrode assembly into the housing, it is necessary to apply a force to the electrode assembly along the axial direction of the electrode assembly to bring the current collector component (connected to one end of the electrode assembly) into contact with the electrode terminal. Since the diameters of the current collector component and the electrode assembly are larger than the diameter of the electrode terminal, the electrode terminal can only act as a stopper and support for the current collector component and the electrode assembly at the contacting part, and the other parts of the current collector component and the electrode assembly cannot obtain effective stopper and support.

[0034] For the wound electrode assembly, since the electrode terminal cannot act as a stopper and support for the pole plate of the outer ring of the electrode assembly and the separator (the part where the projections of the pole plate and the separator on the current collector component do not overlap with the projection of the electrode terminal on the current collector component), when the electrode assembly is incorporated into the housing, warping of the current collector component occurs, causing displacement of the pole plate of the outer ring. The pole plate displacement results in a short circuit in the battery cell and induces thermal runaway, posing a very large potential safety risk and seriously affecting the safety of the battery.

[0035] Based on the above considerations, in the process of attaching the electrode assembly to the housing, in order to reduce the probability of pole plate displacement, the inventor designed a battery cell through in-depth research. This battery cell includes a housing, the housing includes a wall portion (located at one end of the housing), a first insulating member is installed between the current collector component and the wall portion, and a protrusion is formed on the side of the first insulating member facing the current collector component. The projection of the protrusion on the current collector component in the thickness direction of the wall portion does not overlap with the projection of the electrode terminal on the current collector component.

[0036] In such a battery cell, by forming a protrusion on the side of the first insulating member facing the current collector component, in the process of incorporating the electrode assembly into the housing, the protrusion can limit the warping of the current collector component towards the wall portion to a certain extent, thereby restricting the deformation of the electrode assembly towards the wall portion, preventing short circuit and thermal runaway in the battery cell caused by the displacement between the pole plates of the electrode assembly, and improving the safety of the battery cell.

[0037] Embodiments of the present application provide a power-consuming device that uses a battery as a power source. The power-consuming device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery vehicle, an electric vehicle, a steamship, an aircraft, etc. Here, the electric toy may include a stationary or mobile electric toy, for example, a game console, an electric vehicle toy, an electric steamship toy, and an electric airplane toy, etc. The aircraft may include an airplane, a rocket, a space shuttle, and a spaceship, etc.

[0038] In the following embodiments, for the sake of easy explanation, the power-consuming device of the embodiments of the present application is taken as an example of a vehicle for explanation.

[0039] As shown in FIG. 1, FIG. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel-powered vehicle, a 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. A battery 100 is installed inside the vehicle 1000, and the battery 100 may be installed at the bottom, head, or tail of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the starting, navigation, and operating power consumption requirements during driving of the vehicle 1000.

[0040] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000 to provide driving power to the vehicle 1000 instead of or partially instead of fuel oil or natural gas.

[0041] As shown in FIG. 2, FIG. 2 is a schematic structural diagram of a battery 100 according to some embodiments of the present application. The battery 100 includes a housing 20 and battery cells 10, and the battery cells 10 are accommodated in the housing 20. Here, the housing 20 is used to provide an accommodation space for the battery cells 10, and the housing 20 may adopt various structures. In some embodiments, the housing 20 may include a first sub-housing 21 and a second sub-housing 22. The first sub-housing 21 and the second sub-housing 22 are overlapped with each other, and the first sub-housing 21 and the second sub-housing 22 together define an accommodation space for accommodating the battery cells 10. The second sub-housing 22 may have a hollow structure with one end opened, and the first sub-housing 21 may have a plate-like structure. The first sub-housing 21 is covered on the opening side of the second sub-housing 22 to jointly define an accommodation space by the first sub-housing 21 and the second sub-housing 22. The first sub-housing 21 and the second sub-housing 22 may both have a hollow structure with one side opened, and the opening side of the first sub-housing 21 is covered on the opening side of the second sub-housing 22. Of course, the housing 20 formed by the first sub-housing 21 and the second sub-housing 22 may have various shapes, such as a cylinder, a cuboid, etc.

[0042] In the battery 100, there may be a plurality of battery cells 10, and the plurality of battery cells 10 may be connected in series, in parallel, or in series-parallel. Series-parallel connection means that there are not only series connections but also parallel connections among the plurality of battery cells 10. The plurality of battery cells 10 may be integrally and directly connected in series, in parallel, or in series-parallel. Next, the whole formed by the plurality of battery cells 10 is accommodated in the housing 20. Of course, the battery 100 may first connect a plurality of battery cells 10 in series, in parallel, or in series-parallel to form a battery module, and then further connect a plurality of battery modules in series, in parallel, or in series-parallel to form an integral body and accommodate it in the housing 20. The battery 100 may further include other structures. For example, the battery 100 may further include a bus bar member for realizing electrical connection among the plurality of battery cells 10.

[0043] Here, each battery cell 10 may be a secondary battery or a primary battery, and may further be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 may have a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes.

[0044] As shown in FIG. 3, FIG. 3 is an exploded view of the battery cell 10 according to some embodiments of the present application. The battery cell 10 refers to the minimum unit constituting the battery 100. As shown in FIG. 3, the battery cell 10 includes a housing 11, an electrode assembly 13, and other functional members.

[0045] The housing 11 is an assembly for forming the internal environment of the battery cell 10. Here, the internal environment formed by the housing 11 may be used to accommodate the electrode assembly 13, the electrolyte, and other members. The housing 11 may have various shapes and various sizes, for example, a cylindrical shape, a rectangular parallelepiped shape, a hexagonal columnar shape, etc. Specifically, the shape of the housing 11 may be determined according to the specific shape and size of the electrode assembly 13. The material of the housing 11 is various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0046] The electrode assembly 13 is a member in which an electrochemical reaction occurs within the battery cell 10. The housing 11 may include one or more electrode assemblies 13. The electrode assembly 13 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and generally, a separator is provided between the positive electrode plate and the negative electrode plate. The portions of the positive electrode plate and the negative electrode plate having the active material constitute the main body 132 of the electrode assembly 13, and the portions of the positive electrode plate and the negative electrode plate having no active material constitute tabs, respectively. The positive tab and the negative tab may both be located at one end of the main body 132 portion, or may be located at both ends of the main body 132 portion, respectively. In the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals 12 to form a current circuit.

[0047] As shown in FIG. 3, the present application provides a battery cell 10, which includes a housing 11, an electrode terminal 12, an electrode assembly 13, a current collecting component 14, and a first insulating member 15.

[0048] As shown in FIG. 4, FIG. 4 is a cross-sectional view of a battery cell according to some embodiments of the present application. The housing 11 includes a wall portion 11a, and the electrode terminal 12 is mounted on the wall portion 11a in an insulated manner. The electrode assembly 13 is installed within the housing 11, and the electrode assembly 13 includes a main body 132 and a first tab 131, and the first tab 131 is formed at an end of the main body 132 close to the wall portion 11a. The current collecting component 14 is installed between the electrode assembly 13 and the wall portion 11a, and the current collecting component 14 is used to connect the first tab 131 and the electrode terminal 12. The first insulating member 15 is installed between the current collecting component 14 and the wall portion 11a, and is used to insulate and isolate the current collecting component 14 and the wall portion 11a. Here, a protrusion 151 is formed on a side of the first insulating member 15 facing the current collecting component 14, and a projection of the protrusion 151 on the current collecting component 14 in the thickness direction of the wall portion 11a does not overlap with a projection of the electrode terminal 12 on the current collecting component 14.

[0049] In order to reduce the risk of short circuit within the battery cell 10, members with different polarities in the battery cell 10 should be insulated and isolated from each other. For example, between the electrode terminal 12 and the wall portion 11a, between the current collecting component 14 and the wall portion 11a, and between the first tab 131 and the housing 11, all should be insulated and isolated from each other.

[0050] As shown in FIG. 4, the first insulating member 15 is installed between the current collecting component 14 and the wall portion 11a to insulate and isolate the current collecting component 14 and the wall portion 11a.

[0051] The fact that the electrode terminal 12 is mounted on the wall portion 11a in an insulated manner may be understood as that an insulating structure is similarly installed between the electrode terminal 12 and the wall portion 11a to insulate and isolate the electrode terminal 12 and the wall portion 11a.

[0052] For example, in some embodiments of the present application, in order to insulate and isolate the electrode terminal 12 from the wall portion 11a, the first insulating member 15 may extend between the electrode terminal 12 and the wall portion 11a.

[0053] Also, for example, as shown in FIG. 4, in some other embodiments of the present application, the battery cell 10 may further include a second insulating member 17, and the second insulating member 17 is installed between the electrode terminal 12 and the wall portion 11a to insulate and isolate the electrode terminal 12 from the wall portion 11a. The first insulating member 15 is installed between the current collecting component 14 and the wall portion 11a to insulate and isolate the current collecting component 14 from the wall portion 11a.

[0054] In embodiments where the battery cell 10 may further include a second insulating member 17, the first insulating member 15 and the second insulating member 17 may be integrally formed. By such an installation method, the number of components is reduced, the structure of the battery cell 10 is made compact, and the attachment and positioning of the first insulating member 15 and the second insulating member 17 are facilitated, simplifying the assembly process of the battery cell 10 and improving the production efficiency of the battery cell 10. In some other embodiments of the present application, the first insulating member 15 and the second insulating member 17 may be further separately installed.

[0055] The materials of the first insulating member 15 and the second insulating member 17 may be plastics, such as PVC (Polyvinyl chloride), PP (Polypropylene), etc., or the material of the first insulating member 15 may further be rubber, such as butylene rubber, styrene-butadiene rubber, silicone rubber, etc.

[0056] The electrode assembly 13 further includes a second tab 133, and the polarity of the second tab 133 is opposite to that of the first tab 131. The electrode assembly 13 is formed by winding a current collector plate and a separator. Specifically, the current collector plate includes a positive electrode current collector plate and a negative electrode current collector plate, and the positive electrode current collector plate and the negative electrode current collector plate are isolated from each other through a separator. The portions of the positive electrode current collector plate and the negative electrode current collector plate having active materials constitute the main body 132, and the portions of the positive electrode current collector plate and the negative electrode current collector plate without active materials are respectively used to constitute the positive electrode tab and the negative electrode tab. For example, the first tab 131 may be a positive electrode tab, which is constituted by the portion of the positive electrode current collector plate without active material, and the second tab may be a negative electrode tab, which is constituted by the portion of the negative electrode current collector plate without active material. Or, the first tab 131 may be a negative electrode tab, which is constituted by the portion of the negative electrode current collector plate without active material, and the second tab may be a positive electrode tab, which is constituted by the portion of the positive electrode current collector plate without active material.

[0057] The current collecting component 14 is used to connect the first tab 131 and the electrode terminal 12. This means that both the first tab 131 and the electrode terminal 12 are connected to the current collecting component 14, and an electrical connection between the first tab 131 and the electrode terminal 12 is realized through the current collecting component 14.

[0058] Furthermore, the projection of the protrusion 151 on the current collecting component 14 not overlapping the projection of the electrode terminal 12 on the current collecting component 14 indicates that the positions of the protrusion 151 and the electrode terminal 12 are displaced.

[0059] Regarding the battery cell 10 of the present application, by forming the protrusion 151 on the side of the first insulating member 15 facing the current collecting component 14, in the process of incorporating the electrode assembly 13 into the housing, the protrusion 151 can limit the warping towards the wall portion 11a of the current collecting component 14, thereby restricting the deformation of the electrode assembly 13 towards the wall portion 11a, preventing short circuit and thermal runaway in the battery cell 10 caused by the displacement between the current collector plates of the electrode assembly 13, and improving the safety of the battery cell 10.

[0060] At the same time, the first insulating member 15 further realizes insulation isolation between the current collecting component 14 and the wall portion 11a. The same first insulating member 15 realizes different functions, reduces the number of members, and makes the structure of the battery cell 10 more compact.

[0061] As shown in FIG. 4, in some embodiments of the present application, the current collecting component 14 includes a central portion 141 and a peripheral portion 142. The projection of the electrode terminal 12 on the current collecting component 14 is located at the central portion 141, and the projection of the protrusion 151 on the current collecting component 14 is located at the peripheral portion 142.

[0062] As shown in FIG. 4, the peripheral portion 142 is installed around the central portion 141. Taking the example that the electrode assembly 13 has a wound structure, the projections of the inner ring electrode plate and separator of the electrode assembly 13 on the current collecting component 14 are located at the central portion 141, and the projections of the outer ring electrode plate and separator of the electrode assembly 13 on the current collecting component 14 are located at the peripheral portion 142. When the electrode assembly 13 is incorporated into the housing 11, the contact between the protrusion 151 and the peripheral portion 142 prevents the peripheral portion 142 from warping toward the wall portion 11a, and further prevents the outer ring electrode plate of the electrode assembly 13 and the separator from moving toward the wall portion 11a, avoiding electrode plate displacement, and reducing the risk of short circuit and thermal runaway in the battery cell.

[0063] In such an installation method, in the process of incorporating the electrode assembly 13 into the housing 11, the electrode terminal 12 can contact the central portion 141, and the protrusion 151 can contact the peripheral portion 142, thereby providing a stopper and support for the peripheral portion 142, restricting the warping of the peripheral portion 142 toward the wall portion 11a, thereby restricting the short circuit and thermal runaway in the battery cell 10 caused by the displacement between the outer ring electrode plates of the electrode assembly 13, and improving the safety of the battery cell 10.

[0064] As shown in FIG. 4, in some embodiments of the present application, the minimum distance from the protrusion 151 to the outer peripheral surface of the current collecting component 14 in the radial direction of the electrode terminal 12 is smaller than the minimum distance from the protrusion 151 to the outer peripheral surface of the electrode terminal 12.

[0065] It should be noted that the fact that the minimum distance from the protrusion 151 to the outer peripheral surface of the current collecting component 14 is smaller than the minimum distance from the protrusion 151 to the outer peripheral surface of the electrode terminal 12 means that the minimum distance from the same protrusion 151 to the outer peripheral surface of the current collecting component 14 is smaller than the minimum distance from the protrusion 151 to the outer peripheral surface of the electrode terminal 12. After determining the position where the protrusion 151 is formed and the shape of the protrusion 151 in the first insulating member 15, the minimum distance from this protrusion 151 to the outer peripheral surface of the current collecting component 14 is smaller than the minimum distance from this protrusion 151 to the outer peripheral surface of the electrode terminal 12.

[0066] Due to such an installation method, the probability of displacement occurring in the pole plate of the outer ring of the electrode assembly 13 is high and the amount of displacement is large. Therefore, by installing the protrusion 151 relatively close to the outer peripheral surface of the current collecting component 14 and relatively far from the outer peripheral surface of the electrode terminal 12, the protrusion 151 can act as a stopper and provide support for the pole plate that is relatively far from the electrode terminal 12, that is, the pole plate of the outer ring, so as to reduce the probability of occurrence of displacement of the pole plate of the outer ring, prevent short circuit and thermal runaway in the battery cell 10 caused by the displacement of the pole plate of the outer ring, and improve the safety of the battery cell 10.

[0067] As shown in FIG. 5, FIG. 5 is a partially enlarged view of the A viewing angle of some embodiments of the present application. In some embodiments of the present application, there is a gap between the protrusion 151 and the current collecting component 14 along the thickness direction of the wall portion 11a.

[0068] When the protrusion 151 abuts against the current collecting component 14, in the process of attaching the electrode assembly 13 to the housing, the protrusion 151 generates a force that separates from the wall portion 11a along the axial direction of the electrode assembly 13 with respect to the current collecting component 14 and the electrode assembly 13, increasing the difficulty of attaching the electrode assembly 13 to the housing and reducing the production efficiency of the battery cell 10.

[0069] Furthermore, when the protrusion 151 contacts the current collecting component 14, if the size along the thickness direction of the wall portion 11a of the protrusion 151 is too large, the contact between the protrusion 151 and the current collecting component 14 may result in a gap between the current collecting component 14 and the electrode terminal 12, and further affect the stability of the electrical connection between the current collecting component 14 and the electrode terminal 12. Therefore, in order to eliminate the influence caused by factors such as production errors of the protrusion 151, there may be a certain gap between the protrusion 151 and the current collecting component 14.

[0070] In such an installation method, since the electrode terminal 12 needs to contact the current collecting component 14 to achieve an electrical connection, by providing a certain gap between the protrusion 151 and the current collecting component 14, it is possible to avoid the protrusion 151 causing interference in the connection between the electrode terminal 12 and the current collecting component 14, and ensure the stability of the electrical connection between the electrode terminal 12 and the current collecting component 14.

[0071] As shown in FIGS. 6 and 7, FIG. 6 is a schematic diagram of an annular protrusion formed on the first insulating member in some embodiments of the present application, and FIG. 7 is a schematic diagram of a plurality of protrusions formed on the first insulating member in some embodiments of the present application. In some embodiments of the present application, the protrusion 151 is an annular protrusion 151 installed around the central axis of the electrode terminal 12, or the number of the protrusions 151 is plural, and the plural protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12.

[0072] As shown in FIG. 6, in some embodiments of the present application, the protrusion 151 is an annular protrusion 151 installed around the central axis of the electrode terminal 12. Here, the annular protrusion 151 is not limited to a circular ring, and the annular protrusion 151 may further present an elliptical shape, a quadrilateral shape, a polygonal shape, etc., as long as the annular protrusion 151 forms a closed ring around the central axis of the electrode terminal 12.

[0073] As shown in FIG. 7, in some embodiments of the present application, the number of the protrusions 151 is plural, and the plural protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12. Here, the fact that the plural protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12 may mean that the plural protrusions 151 are located on the same circumference around the central axis of the electrode terminal 12 and are distributed at intervals, or the plural protrusions 151 are located on different circumferences around the central axis of the electrode terminal 12 and are distributed at intervals. For example, some of the plural protrusions 151 are distributed at intervals on a first circumference around the central axis of the electrode terminal 12, and another part of the plural protrusions 151 are distributed at intervals on a second circumference around the central axis of the electrode terminal 12. The diameter of the first circumference is different from the diameter of the second circumference, and the number of the protrusions 151 located on the first circumference may be the same as or different from the number of the protrusions 151 located on the second circumference.

[0074] When the number of the protrusions 151 is plural, the shape of the protrusions 151 may be cylindrical, prismatic, fan-shaped, fan-ring-shaped, etc.

[0075] It should be noted that the present application does not limit the specific shape and number of the protrusions 151, as long as the installation of the protrusions 151 can provide a force along the axial direction of the electrode assembly 13 to the current collecting component 14 and the electrode plate and separator of the electrode assembly 13 to prevent the electrode plate from shifting.

[0076] Optionally, in some embodiments of the present application, when a plurality of protrusions 151 are provided, the projected area of the protrusions 151 away from the electrode terminal 12 on the current collecting component 14 is relatively large, and the projected area of the protrusions 151 close to the electrode terminal 12 on the current collecting component 14 is relatively small. Although the electrode terminal 12 can exert a certain supporting effect on the electrode plate of the electrode assembly 13 close to the electrode terminal 12, it cannot exert a supporting effect on the electrode plate of the electrode assembly 13 away from the electrode terminal 12. Therefore, in order to provide more supporting force for the electrode plate of the electrode assembly 13 away from the electrode terminal 12, prevent the occurrence of displacement of the electrode plate of the electrode assembly 13 away from the electrode terminal 12, and correspondingly enable a stable supporting effect on the electrode plate away from the electrode terminal 12, the projected area of the protrusions 151 away from the electrode terminal 12 on the current collecting component 14 may be set relatively large.

[0077] Optionally, in some embodiments of the present application, when a plurality of protrusions 151 are provided, the protrusions 151 away from the electrode terminal 12 are relatively dense, and the protrusions 151 close to the electrode terminal 12 are relatively sparse. Similarly, although the electrode terminal 12 can exert a certain supporting effect on the electrode plate of the electrode assembly 13 close to the electrode terminal 12, it cannot exert a supporting effect on the electrode plate of the electrode assembly 13 away from the electrode terminal 12. Therefore, in order to provide more supporting force for the electrode plate of the electrode assembly 13 away from the electrode terminal 12, prevent the occurrence of displacement of the electrode plate of the electrode assembly 13 away from the electrode terminal 12, and correspondingly enable a stable supporting effect on the electrode plate away from the electrode terminal 12, the protrusions 151 away from the electrode terminal 12 may be installed relatively densely.

[0078] In an embodiment where the protrusion 151 is an annular protrusion 151 installed around the central axis of the electrode terminal 12 by such an installation method, the stopper and support functions exerted by the annular protrusion 151 on the outer ring electrode plate and the separator of the electrode assembly 13 are relatively uniform, and it is difficult for the problem of electrode plate displacement to occur at local positions. In an embodiment where the number of protrusions 151 is plural and the plural protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12, the material of the first insulating member 15 is reduced and the forming difficulty of the first insulating member 15 is reduced by the form in which the plural protrusions 151 are distributed at intervals around the central axis of the electrode terminal 12.

[0079] As shown in FIGS. 8 and 9, FIG. 8 is a schematic diagram of covering the first tab and the outer peripheral surface of the main body with an insulating film in some embodiments of the present application, and FIG. 9 is a partial enlarged view from the B viewing angle in some embodiments of the present application. In some embodiments of the present application, the battery cell 10 further includes an insulating film 16, and the insulating film 16 covers the outer peripheral surfaces of the first tab 131 and the main body 132 and extends to between the protrusion 151 and the current collecting component 14.

[0080] In order to further reduce the short - circuit risk of the battery cell 10, the outer peripheral surfaces of the first tab 131 and the main body 132 both need to be insulated and isolated from the housing 11. Therefore, the insulating film 16 is installed to cover the outer peripheral surfaces of the first tab 131 and the main body 132 to realize the insulating isolation between the outer peripheral surfaces of the first tab 131 and the main body 132 and the housing 11.

[0081] As shown in FIG. 9, in an embodiment where there is a gap between the protrusion 151 and the current collector component 14 along the thickness direction of the wall portion 11a, the first insulating member 15 does not contact the current collector component 14, and the effect of insulating and isolating the current collector component 14 and the wall portion 11a using only the first insulating member 15 is relatively poor. There is still a risk of short circuit between the current collector component 14 and the wall portion 11a. For example, there is a possibility of short circuit between the outer peripheral surface of the current collector component 14 and the wall portion 11a. In order to further improve the insulating and isolating effect between the current collector component 14 and the wall portion 11a and prevent a short circuit between the current collector component 14 and the wall portion 11a, the insulating film 16 may be extended to between the protrusion 151 and the current collector component 14 so that the insulating film 16 can cover the current collector component 14, thereby improving the insulating and isolating effect between the current collector component 14 and the wall portion 11a.

[0082] As shown in FIG. 9, when the insulating film 16 extends to between the protrusion 151 and the current collector component 14, in the case where there is a gap between the protrusion 151 and the current collector component 14 along the thickness direction of the wall portion 11a, the insulating film 16 can fill this gap, and the protrusion 151 can abut against the insulating film 16. That is, the protrusion 151 and the current collector component 14 can sandwich and crimp the insulating film 16, thereby preventing the insulating film 16 from being affected by external factors and moving, and enabling the insulating film 16 to stably cover the current collector component 14, the first tab 131, and the main body 132.

[0083] By such an installation method, by covering the outer peripheral surfaces of the first tab 131 and the main body 132 with the insulating film 16, an insulating and isolating effect is achieved between the first tab 131 and the main body 132 and the housing 11, reducing the short - circuit probability between the first tab 131 and the main body 132 and the housing 11, further reducing the risk of short circuit of the battery cell 10, and improving the safety of the battery cell 10. At the same time, the insulating film 16 extends to between the protrusion 151 and the current collector component 14, enabling the protrusion 151 and the current collector component 14 to sandwich and crimp the insulating film 16, preventing the insulating film 16 from moving, and improving the stability of the insulating film 16 that covers the current collector component 14, the first tab 131, and the main body 132.

[0084] As shown in FIG. 10, FIG. 10 is a schematic diagram of a battery cell 10 according to some embodiments of the present application. In some embodiments of the present application, the housing 11 includes a case 111 and an end cap 112. The case 111 includes a bottom wall 1111 and side walls 1112. The side walls 1112 are peripherally provided around the bottom wall 1111. One end of the side walls 1112 is connected to the bottom wall 1111, and the other end of the side walls 1112 surrounds to form an opening facing the bottom wall 1111. The end cap 112 covers the opening, and the wall portion 11a is the bottom wall 1111 or the end cap 112.

[0085] Here, the bottom wall 1111 and the side walls 1112 may be integrally formed, or the bottom wall 1111 and the side walls 1112 may be further separately installed and connected by means such as welding and locking. Specifically, the side walls 1112 may be in a columnar shape, for example, a cylindrical shape or a prismatic shape.

[0086] The other end of the side walls 1112 facing the bottom wall 1111 surrounds to form an opening, and the current collector component 14 and the electrode assembly 13 can be attached to the case 111 from the opening. After the electrode assembly 13 is incorporated into the case 111, the end cap 112 covers the opening to seal the opening. Further, it is necessary to inject an electrolyte into the housing 11. When the end cap 112 covers the opening, a sealing material, such as a sealing ring or a sealing gasket, may be installed between the end cap 112 and the side walls 1112, thereby improving the sealing performance of the end cap 112 covering the opening and preventing the electrolyte from leaking from the housing 11.

[0087] The case where the wall portion 11a is the bottom wall 1111 or the end cap 112 includes two situations. In one case, the wall portion 11a is the bottom wall 1111, and in the other case, the wall portion 11a is the end cap 112. In the embodiment where the wall portion 11a is the bottom wall 1111, after the electrode assembly 13 is incorporated into the case 111, the current collector component 14 faces the bottom wall 1111, and the heat shrinkable film 15 is located between the bottom wall 1111 and the current collector component 14. In the embodiment where the wall portion 11a is the end cap 112, after the electrode assembly 13 is incorporated into the case 111, the current collector component 14 faces the end cap 112, and the heat shrinkable film 15 is located between the end cap 112 and the current collector component 14.

[0088] With such an installation method, the bottom wall 1111 and the side wall 1112 define a space for accommodating the electrode assembly 13, the electrolyte and other structures, and the end cap 112 covers the opening surrounded by the side wall 1112 to ensure the sealing property of the housing 11.

[0089] As shown in FIG. 10, in some embodiments of the present application, the electrode assembly 13 further includes a second tab 133, the second tab 133 is formed at an end away from the wall portion 11a of the main body 132, the second tab 133 has a polarity opposite to that of the first tab 131, and the second tab 133 is electrically connected to the wall portion 11a.

[0090] As shown in FIG. 10, the first tab 131 is located at an end facing the wall portion 11a of the electrode assembly 13, and the second tab 133 is located at an end away from the wall portion 11a of the electrode assembly 13, that is, the first tab 131 and the second tab 133 are formed at both ends of the main body 132 of the electrode assembly 13, respectively.

[0091] The first tab 131 has the opposite polarity to the second tab 133. For example, the first tab 131 is the positive tab of the electrode assembly 13, which is composed of a portion of the positive electrode plate without the active material, and is electrically connected to the current collector component 14 and the electrode terminal 12. The second tab 133 is the negative tab of the electrode assembly 13, which is composed of a portion of the negative electrode plate without the active material, and is electrically connected to the housing 11 and the wall portion 11a.

[0092] With such an installation method, the first tab 131 and the second tab 133 are located at both ends of the electrode assembly 13. There is relatively good insulation between the first tab 131 and the second tab 133, reducing the risk of short - circuit of the battery cell 10 and improving the safety of the battery cell 10.

[0093] According to a second aspect, the present application further provides a battery 100, which includes the above - mentioned battery cell 10. In the battery cell 10, by forming a protrusion 151 on the side of the first insulating member 15 facing the current collector component 14, it can support the electrode plate of the electrode assembly 13. Therefore, the probability of electrode plate displacement in the process of incorporating the electrode assembly 13 into the housing is reduced, the risk of short - circuit and thermal runaway in the battery cell 10 is reduced, and the safety of the battery 100 is further improved.

[0094] According to a third aspect, the present application further provides a power - consuming device, which includes the above - mentioned battery 100, and the battery 100 is used to provide electrical energy.

[0095] According to a fourth aspect, as shown in FIG. 11, FIG. 11 is a schematic diagram of the manufacturing method of the battery cell of some embodiments of the present application. The present application further provides a manufacturing method of the battery cell 10. Specifically, the manufacturing method of the battery cell 10 is as follows.

[0096] S100, supply the housing 11 and the electrode terminal 12. The housing 11 includes a wall portion 11a, and the electrode terminal 12 is attached to the wall portion 11a in an insulated manner. S200. Supply the electrode assembly 13, where the electrode assembly 13 includes a main body 132 and a first tab 131, and the first tab 131 is formed at an end approaching the wall portion 11a of the main body 132. S300. Supply the current collector component 14 and connect the current collector component 14 to the first tab 131. S400. Supply the first insulating member 15, where a protrusion 151 is formed on the side of the first insulating member 15 facing the current collector component 14, and the projection of the protrusion 151 on the current collector component 14 in the thickness direction of the wall portion 11a does not overlap with the projection of the electrode terminal 12 on the current collector component 14. S500. Install the first insulating member 15 on the wall portion 11a and separate the protrusion 151 from the wall portion 11a. S600. Place the electrode assembly 13 and the current collector component 14 into the housing 11. S700. Connect the current collector component 14 to the electrode terminal 12.

[0097] It should be noted that the above manufacturing method of the battery cell 10 is only exemplary in the production process of the battery cell 10 and does not represent the specific order in the production process of the battery cell 10. In the production process of the battery cell 10, a specific process flow can be created according to the actual situation.

[0098] According to the fifth aspect, as shown in FIG. 12, FIG. 12 is an exemplary illustration of the manufacturing equipment of the battery cell in some embodiments of the present application. The present application further provides manufacturing equipment 2000 for a battery cell, and this manufacturing equipment 2000 for a battery cell includes a first supply device 2100, a second supply device 2200, a third supply device 2300, a fourth supply device 2400, a first assembly device 2500, a second assembly device 2600, a third assembly device 2700, and a fourth assembly device 2800.

[0099] Specifically, the first supply device 2100 is used to supply the housing 11 and the electrode terminal 12. The housing 11 includes a wall portion 11a, and the electrode terminal 12 is insulatingly attached to the wall portion 11a. The second supply device 2200 is used to supply the electrode assembly 13. The electrode assembly 13 includes a main body 132 and a first tab 131. The first tab 131 is formed at an end of the main body 132 that approaches the wall portion 11a. The third supply device 2300 is used to supply the current collecting component 14. The fourth supply device 2400 is used to supply the first insulating member 15. A protrusion 151 is formed on a side of the first insulating member 15 facing the current collecting component 14. A projection of the protrusion 151 on the current collecting component 14 in the thickness direction of the wall portion 11a does not overlap with a projection of the electrode terminal 12 on the current collecting component 14. The first assembling device 2500 is used to connect the current collecting component 14 to the first tab 131. The second assembling device 2600 is used to install the first insulating member 15 on the wall portion 11a and to separate the protrusion 151 from the wall portion 11a. The third assembling device 2700 is used to place the electrode assembly 13 and the current collecting component 14 into the housing 11. The fourth assembling device 2800 is used to connect the current collecting component 14 to the electrode terminal 12.

[0100] In some embodiments of the present application, as shown in FIGS. 3 to 9, the present application provides a battery cell 10. The battery cell 10 includes a housing 11, an electrode terminal 12, an electrode assembly 13, a current collector component 14, and a first insulating member 15. The housing 11 includes a wall portion 11a, and the electrode terminal 12 is attached to the wall portion 11a in an insulated manner. The electrode assembly 13 is installed within the housing 11. The electrode assembly 13 includes a main body 132 and a first tab 131, and the first tab 131 is formed at an end of the main body 132 that approaches the wall portion 11a. The current collector component 14 is installed between the electrode assembly 13 and the wall portion 11a, and the current collector component 14 is used to connect the first tab 131 and the electrode terminal 12. The first insulating member 15 is installed between the current collector component 14 and the wall portion 11a and is used to insulate and isolate the current collector component 14 and the wall portion 11a. Here, a protrusion 151 is formed on a side of the first insulating member 15 facing the current collector component 14, and a projection of the protrusion 151 on the current collector component 14 in the thickness direction of the wall portion 11a does not overlap with a projection of the electrode terminal 12 on the current collector component 14. The projection of the protrusion 151 on the current collector component 14 is located at a peripheral portion 142, the projection of the electrode terminal 12 on the current collector component 14 is located at a central portion 141, and a minimum distance from the protrusion 151 to an outer peripheral surface of the current collector component 14 is smaller than a minimum distance from the protrusion 151 to an outer peripheral surface of the electrode terminal 12. There is a certain gap between the protrusion 151 and the current collector component 14. An outer peripheral surface of the first tab 131 of the electrode assembly 13 and the main body 132 is covered with an insulating film 16, and the insulating film extends to between the protrusion 151 and the current collector component 14.

[0101] The present application has been described with reference to preferred embodiments, but various improvements can be made thereto and members thereof can be replaced with equivalents without departing from the scope of the present application. In particular, provided there are no structural contradictions, the technical features of each item mentioned in each embodiment may be combined in any manner. The present application is not limited to the specific embodiments disclosed and includes all technical solutions falling within the scope of the claims.

Description of Reference Numerals

[0102] In the drawings, the drawings are not drawn to actual scale.

[0103] Description of reference numerals: 10 - battery cell, 11 - housing, 11a - wall portion, 111 - case, 1111 - bottom wall, 1112 - side wall, 112 - end cap, 12 - electrode terminal, 13 - electrode assembly, 131 - first tab, 132 - body, 133 - second tab, 14 - current collector component, 141 - central portion, 142 - peripheral portion, 15 - first insulating member, 151 - protrusion, 16 - insulating film, 17 - second insulating member, 20 - housing, 21 - first sub - housing, 22 - second sub - housing, 100 - battery, 200 - controller, 300 - motor, 1000 - vehicle, 2000 - manufacturing equipment for battery cells, 2100 - first supply device, 2200 - second supply device, 2300 - third supply device, 2400 - fourth supply device, 2500 - first assembly device, 2600 - second assembly device, 2700 - third assembly device, 2800 - fourth assembly device.

Claims

1. A battery cell, comprising: a housing including a wall portion; an electrode terminal attached to the wall portion in an insulated manner; an electrode assembly installed in the housing and including a main body and a first tab, wherein the first tab is formed at an end of the main body close to the wall portion; a current collecting component installed between the first tab and the wall portion for connecting the first tab and the electrode terminal; a first insulating member installed between the current collecting component and the wall portion for insulating and isolating the current collecting component and the wall portion, wherein a protrusion is formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in a thickness direction of the wall portion does not overlap a projection of the electrode terminal on the current collecting component; the current collecting component includes a central portion and a peripheral portion, a projection of the electrode terminal on the current collecting component is located at the central portion, and a projection of the protrusion on the current collecting component is located at the peripheral portion.

2. A battery cell, comprising: a housing including a wall portion; an electrode terminal attached to the wall portion in an insulated manner; an electrode assembly installed in the housing and including a main body and a first tab, wherein the first tab is formed at an end of the main body close to the wall portion; a current collecting component installed between the first tab and the wall portion for connecting the first tab and the electrode terminal; a first insulating member installed between the current collecting component and the wall portion for insulating and isolating the current collecting component and the wall portion, wherein a protrusion is formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in a thickness direction of the wall portion does not overlap a projection of the electrode terminal on the current collecting component; a minimum distance from the protrusion to an outer peripheral surface of the current collecting component in a radial direction of the electrode terminal is smaller than a minimum distance from the protrusion to an outer peripheral surface of the electrode terminal.

3. The battery cell according to claim 1 or 2, wherein there is a gap along a thickness direction of the wall portion between the protrusion and the current collecting component.

4. The protrusion is an annular protrusion installed around a central axis of the electrode terminal, or the number of the protrusions is plural, and the plural protrusions are distributed at intervals around a central axis of the electrode terminal.

5. The battery cell further includes an insulating film, and the insulating film covers the outer peripheral surface of the first tab and the main body and extends to between the protrusion and the current collecting component. The battery cell according to any one of claims 1 to 4.

6. The housing includes a case and an end cap. The case includes a bottom wall and side walls. The side walls are provided around the bottom wall. One end of the side walls is connected to the bottom wall, and the other end of the side walls surrounds to form an opening facing the bottom wall. The end cap covers the opening, and the wall portion is the bottom wall or the end cap. The battery cell according to any one of claims 1 to 5.

7. The electrode assembly further includes a second tab. The second tab is formed at an end of the main body away from the wall portion. The second tab has a polarity opposite to that of the first tab, and the second tab is electrically connected to the wall portion. The battery cell according to any one of claims 1 to 6.

8. A battery including the battery cell according to any one of claims 1 to 7.

9. A power consumption device including the battery according to claim 8, wherein the battery is used to provide electrical energy.

10. A method for manufacturing a battery cell, supplying a housing and an electrode terminal, wherein the housing includes a wall portion, and the electrode terminal is attached to the wall portion in an insulated manner; supplying an electrode assembly, wherein the electrode assembly includes a main body and a first tab, and the first tab is formed at an end of the main body close to the wall portion; supplying a current collecting component and connecting the current collecting component to the first tab; supplying a first insulating member, wherein a protrusion is formed on a side of the first insulating member facing the current collecting component, and a projection of the protrusion on the current collecting component in the thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collecting component; installing the first insulating member on the wall portion and separating the protrusion from the wall portion; placing the electrode assembly and the current collecting component into the housing; including connecting the current collecting component to the electrode terminal. The method for manufacturing a battery cell, wherein the current collector component includes a central portion and a peripheral portion, the projection of the electrode terminal on the current collector component is located in the central portion, and the projection of the protrusion on the current collector component is located in the peripheral portion.

11. A method for manufacturing a battery cell, comprising: supplying a housing and an electrode terminal, wherein the housing includes a wall portion, and the electrode terminal is attached to the wall portion in an insulated manner; supplying an electrode assembly, wherein the electrode assembly includes a main body and a first tab, and the first tab is formed at an end of the main body close to the wall portion; supplying a current collector component and connecting the current collector component to the first tab; supplying a first insulating member, wherein a protrusion is formed on a side of the first insulating member facing the current collector component, and a projection of the protrusion on the current collector component in a thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collector component; installing the first insulating member on the wall portion and separating the protrusion from the wall portion; placing the electrode assembly and the current collector component into the housing; connecting the current collector component to the electrode terminal, wherein a minimum distance from the protrusion to an outer peripheral surface of the current collector component in a radial direction of the electrode terminal is smaller than a minimum distance from the protrusion to an outer peripheral surface of the electrode terminal.

12. Manufacturing equipment for a battery cell, comprising: a first supply device for supplying a housing and an electrode terminal, wherein the housing includes a wall portion, and the electrode terminal is attached to the wall portion in an insulated manner; a second supply device for supplying an electrode assembly, wherein the electrode assembly includes a main body and a first tab, and the first tab is formed at an end of the main body close to the wall portion; a third supply device for supplying a current collector component; a fourth supply device for supplying a first insulating member, wherein a protrusion is formed on a side of the first insulating member facing the current collector component, and a projection of the protrusion on the current collector component in a thickness direction of the wall portion does not overlap with a projection of the electrode terminal on the current collector component; a first assembling device for connecting the current collector component to the first tab; a second assembling device for installing the first insulating member on the wall portion and separating the protrusion from the wall portion. A third assembling device for placing the electrode assembly into the housing, and a fourth assembling device for connecting the current collecting component to the electrode terminal, and the current collecting component includes a central portion and a peripheral portion, a projection of the electrode terminal on the current collecting component is located in the central portion, and a projection of the protrusion on the current collecting component is located in the peripheral portion, a manufacturing apparatus for a battery cell.

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