Conductive assembly, cover plate assembly and battery

Abstract

The utility model provides a conductive assembly, a cover plate assembly and a battery, and relates to the technical field of batteries. The conductive assembly includes an electrode terminal and a conductive member. The electrode terminal can be electrically connected with the electrode assembly, the electrode terminal penetrates through the first mounting hole and the second mounting hole of the conductive part, and at least part of the electrode terminal can be wrapped by the inner wall of the first mounting hole and the second mounting hole, so that the conductive part can achieve the purpose of protecting the electrode terminal. The inner diameter of the second mounting hole of the conductive piece is larger than the minimum inner diameter of the first mounting hole, so that a stepped hole structure is formed in the conductive piece, and the conductive piece and the electrode terminal are connected more reliably. In addition, the inner surface area of a hole structure formed by the first mounting hole and the second mounting hole can be larger, so that the contact area between the electrode terminal and the first mounting hole and the contact area between the electrode terminal and the second mounting hole can be relatively larger, the conductive part has better overcurrent capacity, and the heat productivity of the conductive assembly can be reduced.

Description

Technical Field

[0001] The present application relates to a conductive component, a cover plate component and a battery, belonging to the technical field of batteries. Background Art

[0002] Currently, square batteries are often connected by welding electrode terminals to conductive parts, but this generates a lot of heat, which affects the safety of the single battery during the charging and discharging process. Utility Model Content

[0003] The present application provides a conductive component, a cover plate assembly and a battery, which solve the problem of easy overheating of the battery in the related art.

[0004] In a first aspect, the present application provides a conductive component, including:

[0005] Electrode terminal;

[0006] A conductive member having a first mounting hole and a second mounting hole, one end of the first mounting hole being connected to the second mounting hole, the conductive member having a first surface and a second surface opposite to each other in a thickness direction of the conductive member, an opening of the first mounting hole facing away from the first mounting hole being located on the first surface, an opening of the second mounting hole facing away from the first mounting hole being located on the second surface, and a minimum inner diameter of the first mounting hole being smaller than an inner diameter of the second mounting hole;

[0007] The electrode terminal is inserted into the first mounting hole and the second mounting hole, and at least a portion of the inner wall of the first mounting hole and / or at least a portion of the inner wall of the second mounting hole is in contact with an outer wall of the electrode terminal.

[0008] In some embodiments, the first mounting hole includes a first hole segment, one end of the first hole segment is connected to the second mounting hole, the inner diameter of the end of the first hole segment connected to the second mounting hole is smaller than the inner diameter of the second mounting hole, and the inner diameter of the first hole segment gradually increases in a direction away from the second mounting hole.

[0009] In some embodiments, the first mounting hole further includes a second hole segment, the first hole segment is connected to the second mounting hole through the second hole segment, the inner diameter of the second hole segment is smaller than the inner diameter of the first hole segment and the inner diameter of the second mounting hole, and the side wall of the electrode terminal is in contact with the inner wall of the second hole segment.

[0010] In some embodiments, the first mounting hole further includes a third hole segment, the first hole segment is connected to the second hole segment through the third hole segment, the inner diameter of the third hole segment is larger than the inner diameter of the second hole segment and is the same as the minimum inner diameter of the first hole segment, and the side wall of the electrode terminal is in contact with the inner wall of the third hole segment.

[0011] In some embodiments, the inner diameter of the second mounting hole is 2 cm-3 cm, the difference between the minimum inner diameter of the first mounting hole and the inner diameter of the second mounting hole is 0.2 cm-0.5 cm, and the maximum inner diameter of the first mounting hole is 3 cm-3.5 cm.

[0012] In some embodiments, the ratio of the maximum inner diameter of the first mounting hole to the inner diameter of the second mounting hole is 1-1.5 to 1, and the ratio of the minimum inner diameter of the first mounting hole to the inner diameter of the second mounting hole is 0.7-1 to 1.

[0013] In some embodiments, the inner diameter of the through hole gradually increases along the axis of the through hole.

[0014] In some embodiments, the base material of the electrode terminal is copper, and the electrode terminal is connected to the conductive member by welding.

[0015] In some embodiments, the surface of the electrode terminal has an anti-oxidation layer.

[0016] In a second aspect, based on the above conductive component, the present application also proposes a cover plate assembly, including the above conductive component.

[0017] In some embodiments, the cover assembly further includes a first structural member, a cover body, a second structural member and a sealing member, wherein the first structural member is arranged on one side of the cover body, the second structural member is arranged on the other side of the cover body, the conductive member is arranged on the side of the second structural member facing away from the cover body, the electrode terminal is passed through the first structural member, the cover body and the second structural member, and the sealing member is sleeved on the electrode terminal.

[0018] In some embodiments, the conductive component includes a first conductive component and a second conductive component, the second conductive component is a negative electrode conductive component, and a base material of an electrode terminal of the second conductive component is a copper material.

[0019] In some embodiments, a surface of the electrode terminal of the second conductive component has an anti-oxidation layer.

[0020] In a third aspect, based on the above cover plate assembly, the present application further proposes a battery, comprising an electrode assembly, a converter and the above cover plate assembly, wherein the electrode terminal is electrically connected to the electrode assembly via the converter.

[0021] In the conductive assembly provided by the present application, the electrode terminal is provided through the through hole of the conductive member, and the through hole can cover at least part of the electrode terminal, so that the conductive member can protect the electrode terminal. The inner wall of the through hole can be limitedly matched with the electrode terminal, so that the conductive member can be stably and reliably fixed on the electrode terminal, thereby making the structure of the conductive assembly of the present application more stable and reliable.

[0022] At least part of the inner wall of the through hole is not parallel to the axis of the through hole, so that the inner diameters of different hole sections on the axis of the through hole are different, so that a conical surface or a plane structure can be formed on the inner wall of the through hole, which can increase the inner surface area of ​​the inner wall of the through hole. In this way, the contact area between the electrode terminal and the through hole can be relatively larger, so that the conductive part has a better current carrying capacity, so that the heat generation of the conductive component of the present application can be reduced. The through hole passes through the conductive part, so that the electrode terminal can be inserted into the conductive part and can be connected to an external electrical connection structure. The inner diameters of different hole sections on the axis of the through hole are different, and the inner wall of the through hole can also limit the conductive part on the axis of the through hole, so that the connection and fixing effect between the conductive part and the electrode terminal is more reliable.

[0023] In the cover plate assembly proposed in the present application, the first structural member can be covered on the electrode assembly so that the cover plate assembly can be fixed on the electrode assembly. In this way, the cover plate assembly can cover one side of the electrode assembly to protect the electrode assembly and prevent the electrode assembly from being damaged by bumps to a certain extent.

[0024] In the battery proposed in the present application, the electrode assembly can be fully protected due to the application of the above-mentioned cover plate assembly, and at the same time, the heat generated by the battery during the charging and discharging process can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0026] Figure 1 A schematic diagram of a battery according to an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a conductive component according to an embodiment of the present application;

[0028] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0029] Figure 4 for Figure 3 A schematic diagram showing the enlarged display of the middle A area;

[0030] Figure 5 A schematic diagram of a conductive member of a battery module according to an embodiment of the present application;

[0031] Figure 6 A schematic diagram of an electrode terminal of a battery module according to an embodiment of the present application;

[0032] Figure 7 It is a schematic diagram of the exploded structure of the cover plate assembly according to an embodiment of the present application.

[0033] Reference numerals:

[0034] 100-electrode terminal, 110-first boss, 120-second boss, 130-limiting groove,

[0035] 200-conductive member, 210-first mounting hole, 211-first hole section, 212-second hole section, 213-third hole section, 220-second mounting hole,

[0036] 300- first structural member,

[0037] 400-cover body,

[0038] 500- Second structural member,

[0039] 600-Seals,

[0040] 700-Electrode Assembly,

[0041] 800-Adapter,

[0042] 900-housing. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Currently, square batteries are often connected by welding electrode terminals to conductive parts, but this generates a lot of heat, which affects the safety of the single battery during the charging and discharging process.

[0050] In the conductive assembly provided by the present application, the electrode terminal is inserted into the first mounting hole and the second mounting hole of the conductive member, and the inner wall of the first mounting hole and the second mounting hole can cover at least part of the electrode terminal, so that the conductive member can protect the electrode terminal. The inner wall of the first mounting hole and the inner wall of the second mounting hole can cooperate with the electrode terminal in a limited manner, so that the conductive member can be stably and reliably fixed on the electrode terminal, thereby making the structure of the conductive assembly of the present application more stable and reliable.

[0051] The inner diameter of the second mounting hole of the conductive member is larger than the minimum inner diameter of the first mounting hole, so that the inner diameter of the first mounting hole and the inner diameter of at least part of the second mounting hole are different, so that the inner surface area of ​​the hole structure formed by the first mounting hole and the second mounting hole is larger, so that the contact area between the electrode terminal and the first mounting hole and the second mounting hole can be relatively larger, so that the conductive member has a better current carrying capacity, so that the heat generation of the conductive component of the present application can be reduced. The openings at the opposite ends of the first mounting hole and the second mounting hole are located on both sides of the thickness direction of the conductive member, so that the electrode terminal can be inserted into the conductive member and can be connected to an external electrical connection structure. The inner diameter of the first mounting hole is smaller than the inner diameter of the second mounting hole, and a step structure can also be formed in the conductive member, so that the connection and fixing effect between the conductive member and the electrode terminal is more reliable.

[0052] In the cover plate assembly proposed in the present application, the first structural member can be covered on the electrode assembly so that the cover plate assembly can be fixed on the electrode assembly. In this way, the cover plate assembly can cover one side of the electrode assembly to protect the electrode assembly and prevent the electrode assembly from being damaged by bumps to a certain extent.

[0053] In the battery proposed in the present application, the electrode assembly can be fully protected due to the application of the above-mentioned cover plate assembly, and at the same time, the heat generated by the battery during the charging and discharging process can be reduced.

[0054] The conductive assembly, cover assembly and battery provided in the present application are described in detail below in conjunction with specific embodiments.

[0055] The present application embodiment provides a conductive component, referring to Figures 1 to 5 As shown, it includes an electrode terminal 100 and a conductive member 200. The conductive component can be electrically connected to the electrode assembly 700.

[0056] The conductive member 200 is a basic component of the conductive assembly of the present application, and the conductive member 200 can provide a mounting base for at least some of the other components of the conductive assembly and protect at least some of the other components. The conductive member 200 can be connected with the electrode terminal 100, and the electrode assembly 700 is electrically connected to the external electrical connection structure through the electrode terminal 100, so that the electrode assembly 700 can be energized.

[0057] The conductive member 200 is provided with a through hole, which passes through the conductive member 200, so that the openings on both sides of the through hole are located on the surfaces of the conductive member 200 on both sides along the thickness direction of the conductive member 200. Specifically, the conductive member 200 has a first surface 230 and a second surface 240 located on opposite sides of the conductive member 200 in the thickness direction, and the openings on both sides of the through hole are located on the first surface 230 and the second surface 240 respectively. The electrode terminal 100 is penetrated through the through hole, so that the through hole can be limitedly matched with the electrode terminal 100, so that the conductive member 200 is relatively more stably and reliably fixed on the electrode terminal 100. The end of the electrode terminal 100 can also be exposed on the surface of the conductive member 200 to facilitate the connection of the electrode terminal 100 with the external electrical connection structure.

[0058] At least part of the inner wall of the through hole is not parallel to the axis of the through hole, so that the inner diameters of different hole sections on the axis of the through hole are different, so that a conical surface or a plane structure can be formed on the inner wall of the through hole, which can increase the inner surface area of ​​the inner wall of the through hole. In this way, the contact area between the electrode terminal 100 and the through hole can be relatively larger, so that the conductive member 200 has a better current carrying capacity, so that the heat generation of the conductive component of the present application can be reduced. The through hole passes through the conductive member 200, so that the electrode terminal 100 can be inserted into the conductive member 200 and can be connected to an external electrical connection structure. The inner diameters of different hole sections on the axis of the through hole are different, and the inner wall of the through hole can also limit the conductive member 200 on the axis of the through hole, so that the connection and fixing effect of the conductive member 200 and the electrode terminal 100 is more reliable.

[0059] In some embodiments, the through hole of the conductive member 200 includes a first mounting hole 210 and a second mounting hole 220, the first mounting hole 210 and the second mounting hole 220 are connected, the opening of the first mounting hole 210 facing away from the second mounting hole 220 is located on the first surface 230 of the conductive member 200, and the opening of the second mounting hole 220 facing away from the first mounting hole 210 is located on the second surface 240 of the conductive member 200, so that the hole structure formed by connecting the first mounting hole 210 and the second mounting hole 220 is a through hole structure. The electrode terminal 100 is penetrated through the first mounting hole 210 and the second mounting hole 220, so that the first mounting hole 210 and the second mounting hole 220 can be limitedly matched with the electrode terminal 100, so that the conductive member 200 is relatively more stably and reliably fixed on the electrode terminal 100. The end of the electrode terminal 100 can also be exposed to the surface of the connecting member to facilitate the connection of the electrode terminal 100 with the external electrical connection structure.

[0060] Specifically, the inner diameter of at least one of the first mounting hole 210 and the second mounting hole 220 can be set to be smaller than the outer diameter of the electrode terminal 100, so that the electrode terminal 100 can be embedded in the first mounting hole 210 and / or the second mounting hole 220 by interference fit, so that the electrode terminal 100 can be stably and reliably connected to the conductive member 200.

[0061] The inner diameters of the first mounting hole 210 and the second mounting hole 220 of the conductive member 200 can be set differently, wherein the minimum inner diameter of the first mounting hole 210 is smaller than the inner diameter of the second mounting hole 220, so that the inner diameter of the side where the second mounting hole 220 is connected to the first mounting hole 210 is different from the inner diameter of the first mounting hole 210, so that a step structure can be formed at the location where the first mounting hole 210 and the second mounting hole 220 are connected, and the end face of the step structure is a part of the inner wall of the through hole, and the end face of the step structure is perpendicular to the through hole, so that the end face of the step structure is not parallel to the through hole, so that the overall inner surface area of ​​the first mounting hole 210 and the second mounting hole 220 in the conductive member 200 is larger. Specifically, the total area of ​​the inner surfaces of the first mounting hole 210 and the second mounting hole 220 may include not only the area of ​​the inner side wall of the first mounting hole 210 and the inner side wall of the second mounting hole 220, but also the area of ​​the step surface of the end side of the first mounting hole 210 or the end side of the second mounting hole 220, so that the total area of ​​the inner surfaces of the first mounting hole 210 and the second mounting hole 220 can be larger. When the electrode terminal 100 is inserted into the first mounting hole 210 and the second mounting hole 220, at least part of the inner wall of the first mounting hole 210 and / or at least part of the inner wall of the second mounting hole 220 contacts the outer wall of the electrode terminal 100. Since the total area of ​​the inner wall of the first mounting hole 210 and the inner wall of the second mounting hole 220 is relatively larger, the contact area between the outer wall of the electrode terminal 100 and the inner wall of the first mounting hole 210 and the inner wall of the second mounting hole 220 is also relatively larger, thereby increasing the contact area between the electrode terminal 100 and the conductive member 200 and reducing the contact resistance between the electrode terminal 100 and the conductive member 200, so that the conductive member 200 has a better current carrying capacity and the heat generated by the electrode assembly 700 during the power-on process is relatively smaller.

[0062] The side of the second mounting hole 220 facing away from the first mounting hole 210 can be arranged on the end side of the conductive member 200 facing the electrode assembly 700, so that the opening of the second mounting hole 220 facing away from the first mounting hole 210 is located on the surface of the conductive member 200 facing the electrode assembly 700. Accordingly, the first mounting hole 210 can be arranged adjacent to the side of the conductive member 200 facing away from the electrode assembly 700, so that the first mounting hole 210 and the second mounting hole 220 can be respectively located on both sides of the conductive member 200. When preparing the conductive member 200 of the present application, the first mounting hole 210 and the second mounting hole 220 with different inner diameters can be formed by drilling holes on opposite sides of the conductive member 200, so that the first mounting hole 210 and the second mounting hole 220 can be connected, thereby making the process of preparing the first mounting hole 210 and the second mounting hole 220 on the conductive member 200 relatively simpler. In this way, the preparation efficiency of the conductive member 200 can be improved and the preparation cost can be reduced, so that the preparation efficiency of the conductive assembly of the present application is improved and the preparation cost is reduced.

[0063] In some embodiments, reference Figure 4 As shown, the inner wall of the first mounting hole 210 of the conductive member 200 of the present application can be configured to contact the outer wall of the electrode terminal 100, so that the contact area between the electrode terminal 100 and the conductive member 200 is further increased, thereby further reducing the contact resistance between the electrode terminal 100 and the conductive member 200, and improving the current carrying capacity of the conductive member 200, so that the heat generation of the conductive component of the present application is further reduced.

[0064] Specifically, the inner diameter of the portion of the electrode terminal 100 that passes through the first mounting hole 210 can be set to be equal to the inner diameter of the first mounting hole 210, or the inner diameter of the portion of the electrode terminal 100 that passes through the first mounting hole 210 can be set to be slightly larger than the inner diameter of the first mounting hole 210, so that the outer wall of the portion of the electrode terminal 100 that passes through the first mounting hole 210 can contact the inner wall of the first mounting hole 210. In this way, the first mounting hole 210 and the electrode terminal 100 can also be mutually limited and matched in the radial direction of the first mounting hole 210, so that the electrode terminal 100 and the conductive member 200 are reliably connected.

[0065] In some embodiments, the inner diameter of the second mounting hole 220 is 2 cm-3 cm, the difference between the minimum inner diameter of the first mounting hole 210 and the inner diameter of the second mounting hole 220 is 0.2 cm-0.5 cm, and the maximum inner diameter of the first mounting hole 210 is 3 cm-3.5 cm. Setting the sizes of the first mounting hole 210 and the second mounting hole 220 in this way can facilitate processing the first mounting hole 210 and the second mounting hole 220 on the conductive member 200.

[0066] In some embodiments, the ratio of the maximum inner diameter of the first mounting hole 210 to the inner diameter of the second mounting hole 220 is 1-1.5 to 1, and the ratio of the minimum inner diameter of the first mounting hole 210 to the inner diameter of the second mounting hole 220 is 0.7-1 to 1. Setting the sizes of the first mounting hole 210 and the second mounting hole 220 in this way can facilitate processing of the first mounting hole 210 and the second mounting hole 220 on the conductive member 200.

[0067] In some embodiments, the inner wall of the through hole of the conductive member 200 of the present application can be set as an inclined surface, so that the inner diameter of the through hole gradually increases in the axial direction of the through hole, so that the inner wall area of ​​the through hole is larger than the inner wall area of ​​the cylindrical straight hole structure, thereby making the surface area of ​​the inner wall of the through hole larger. In this way, the contact area between the outer wall of the electrode terminal 100 and the inner wall of the through hole is also relatively larger, thereby increasing the contact area between the electrode terminal 100 and the conductive member 200, reducing the contact resistance between the electrode terminal 100 and the conductive member 200, so that the conductive member 200 has a better current capacity, and the heat generated by the electrode assembly 700 during the power-on process is relatively smaller.

[0068] In some embodiments, reference Figures 4 to 6 As shown, the first mounting hole 210 of the conductive member 200 of the present application may be provided to include a first hole section 211, and one end of the first hole section 211 is connected to the second mounting hole 220. Specifically, the other end of the first hole section 211 extends to the end surface of the conductive member 200 facing away from the electrode assembly 700, and an opening of the first mounting hole 210 is formed on the end surface of the conductive member 200 facing away from the electrode assembly 700, and the external electrical connection structure can be electrically connected to the electrode terminal 100 through the opening.

[0069] The inner diameter of one end of the first hole section 211 connected to the second mounting hole 220 may be set to be smaller than the inner diameter of the second mounting hole 220, so that a step structure is formed between the first hole section 211 and the second mounting hole 220. Accordingly, the inner wall of the second mounting hole 220 may include an inner side wall in the circumferential direction of the second mounting hole 220 and an inner wall in the thickness direction of the conductive member 200, so that the inner wall area of ​​the second mounting hole 220 is larger.

[0070] The difference between the inner diameter of the end of the first hole section 211 connected to the second mounting hole 220 and the inner diameter of the second mounting hole 220 can be set to be greater than the axial length dimension of the second mounting hole 220. The inner diameter of the second mounting hole 220 is greater than the inner diameter of the first mounting hole 210.

[0071] Specifically, the electrode terminal 100 may be provided with a first boss 110 protruding from the surface of the electrode terminal 100, and the first boss 110 may be embedded in the second mounting hole 220 of the conductive member 200. The axial side outer wall of the first boss 110 may contact the inner wall of the conductive member 200 in the thickness direction of the second mounting hole 220, so that the contact area between the electrode terminal 100 and the second mounting hole 220 is relatively large. The circumferential side outer wall of the first boss 110 may also contact the circumferential side inner wall of the second mounting hole 220, which may further increase the contact area between the electrode terminal 100 and the conductive member 200, thereby further reducing the contact resistance between the electrode terminal 100 and the conductive member 200, and improving the current carrying capacity of the conductive member 200, so that the heat generation of the conductive assembly of the present application is further reduced.

[0072] Specifically, the inner diameter of the portion of the electrode terminal 100 that passes through the second mounting hole 220 can be set to be equal to the inner diameter of the second mounting hole 220, or the inner diameter of the portion of the electrode terminal 100 that passes through the second mounting hole 220 can be set to be slightly larger than the inner diameter of the second mounting hole 220, so that the outer wall of the portion of the electrode terminal 100 that passes through the second mounting hole 220 can contact the inner wall of the second mounting hole 220. In this way, the second mounting hole 220 and the electrode terminal 100 can also be mutually limited and matched in the radial direction of the second mounting hole 220, so that the electrode terminal 100 and the conductive member 200 are reliably connected.

[0073] In addition, it should be understood that, since the inner diameter of the second mounting hole 220 of the conductive member 200 is larger than the inner diameter of the first mounting hole 210, the area of ​​the circumferential inner wall of the second mounting hole 220 is also relatively larger. In this way, the contact area between the electrode terminal 100 and the conductive member 200 can be further increased, and the contact resistance between the electrode terminal 100 and the conductive member 200 can be further reduced.

[0074] In some embodiments, reference Figures 4 to 6 As shown, in the direction away from the second mounting hole 220, the inner diameter of the first hole section 211 gradually increases, so that the hole type of the first hole section 211 is a truncated cone structure, and the inner wall of the first hole section 211 is not parallel to the axis of the through hole, so that the area of ​​the inner wall of the first hole section 211 can be further increased, and then the inner wall area of ​​the first mounting hole 210 is larger. The electrode terminal 100 is inserted into the first hole section 211, and the electrode terminal 100 and the first hole section 211 are interference fit, so that the outer wall of the electrode terminal 100 can fully contact with the inner wall of the first hole section 211, so that the contact area between the electrode terminal 100 and the conductive member 200 is further increased, so that the contact resistance between the electrode terminal 100 and the conductive member 200 can be further reduced, and the current carrying capacity of the conductive member 200 can be improved, so that the heat generation of the conductive component of the present application is further reduced.

[0075] Specifically, the electrode terminal 100 may be provided with a second boss 120 of a truncated cone structure, which is a protruding structure protruding from the surface of the electrode terminal 100. The second boss 120 matches the outer dimensions of the first hole section 211 of the conductive member 200, so that the outer wall of the second boss 120 can fully contact the inner wall of the first hole section 211.

[0076] In some embodiments, reference Figures 4 to 6 As shown, the first mounting hole 210 of the conductive member 200 of the present application further includes a second hole segment 212, and the first hole segment 211 can be connected to the second mounting hole 220 through the second hole segment 212. Specifically, the second hole segment 212 is located between the first hole segment 211 and the second mounting hole 220. The inner diameter of the second hole segment 212 is smaller than the inner diameter of the first hole segment 211 and the inner diameter of the second mounting hole 220.

[0077] The first mounting hole 210 of the conductive member 200 of the present application further includes a third hole segment 213, the third hole segment 213 is located between the second hole segment 212 and the first hole segment 211, and the first hole segment 211 is connected to the second hole segment 212 through the third hole segment 213. The two ends of the third hole segment 213 are respectively connected to the second hole segment 212 and the first hole segment 211, and accordingly, the second hole segment 212 is located between the second mounting hole 220 and the third hole segment 213. The inner diameter of the third hole segment 213 is larger than the inner diameter of the second hole segment 212, so that a step structure can be formed at the position where the second hole segment 212 and the third hole segment 213 are connected, thereby making the total area of ​​the surface of the inner opening of the conductive member 200 larger. Specifically, the inner surface area of ​​the third hole segment 213 can include not only the area of ​​the inner side wall of the third hole segment 213, but also the area of ​​the step surface of the end side of the third hole segment 213 in the thickness direction of the conductive member 200, so that the area of ​​the inner surface of the third hole segment 213 can be increased. When the electrode terminal 100 is inserted into the second hole segment 212 and the third hole segment 213, the circumferential inner wall of the third hole segment 213 and the inner wall along the thickness direction of the conductive member 200 are in contact with the outer wall of the electrode terminal 100. In this way, the contact area between the outer wall of the electrode terminal 100 and the inner wall of the third hole segment 213 is relatively larger, thereby increasing the contact area between the electrode terminal 100 and the conductive member 200 and reducing the contact resistance between the electrode terminal 100 and the conductive member 200, so that the conductive member 200 has a better current carrying capacity, and the heat generated by the electrode assembly 700 during the charging and discharging process is relatively smaller.

[0078] The inner diameters of the second mounting hole 220 and the third hole section 213 located on both sides of the second hole section 212 are both larger than the second hole section 212, so that a protrusion structure can be formed at the second hole section 212 in the conductive member 200. Correspondingly, a limiting groove 130 located between the first boss 110 and the second boss 120 can be formed on the electrode terminal 100. The limiting groove 130 cooperates with the protrusion structure at the second hole section 212, so that the connection effect between the electrode terminal 100 and the conductive member 200 is more stable and reliable.

[0079] In some embodiments, the electrode terminal 100 and the conductive member 200 in the present application can be riveted so that the electrode terminal 100 is inserted into the opening structure of the conductive member 200, so that the inner wall of the first hole section 211 can be fully in contact with the outer wall of the electrode terminal 100, so that the contact area between the electrode terminal 100 and the conductive member 200 is larger, and the connection effect is more stable and reliable. The electrode terminal 100 and the conductive member 200 can also be welded to the electrode terminal 100, so that the connection effect between the electrode terminal 100 and the conductive member 200 is more stable and reliable.

[0080] Specifically, the side of the electrode terminal 100 facing away from the electrode assembly 700 may be arranged in the first hole section 211 of the conductive member 200, so that the electrode terminal 100 does not protrude from the conductive member 200. The side of the electrode terminal 100 facing away from the electrode assembly 700 may be welded to the conductive member 200, which makes welding the electrode terminal 100 and the conductive member 200 more convenient.

[0081] The present application also provides a cover plate assembly, which can be used in a battery. Figure 1 , Figure 2 and Figure 7 As shown, it includes a first structural member 300, a cover body 400, a second structural member 500, a sealing member 600 and the above conductive assembly. Among them, the first structural member 300 can be covered on the outer wall of the electrode assembly 700 where the electrode terminal 100 is arranged, the first structural member 300 is located on one side of the cover body 400, so that the cover body 400 can be detachably stacked on the first structural member 300, the second structural member 500 is arranged on the other side of the cover body 400, and the conductive member 200 is arranged on the second structural member 500. Accordingly, the electrode terminal 100 can be sequentially penetrated through the first structural member 300, the cover body 400, the second structural member 500 and the conductive member 200. In this way, when preparing the cover assembly of the present application, the first structural member 300, the cover body 400, the second structural member 500 and the conductive member 200 can be prepared separately, and then the first structural member 300, the cover body 400, the second structural member 500, the sealing member 600 and the conductive member are assembled and connected to form the cover assembly. This can reduce the difficulty of the preparation process of the cover assembly and improve the preparation efficiency of the cover assembly. The sealing member 600 is sleeved on the electrode terminal 100.

[0082] The cover body 400 may be provided with a limiting groove structure that matches the second structural member 500, so that the second structural member 500 can be embedded in the limiting groove structure of the cover body 400. The second structural member 500 may also be provided with a limiting groove structure, so that the conductive member 200 may also be embedded in the limiting groove structure of the second structural member 500.

[0083] The first structural member 300 may be made of an insulating plastic member, which can protect the electrode terminal 100 and the conductive member 200 .

[0084] In some embodiments, the number of conductive components in the cover plate assembly of the present application can be set to multiple, specifically two, and the two conductive components are respectively the first conductive component and the second conductive component, so that the battery using the cover plate assembly of the present application releases less heat during the charging and discharging process. The first conductive component and the second conductive component both have an electrode terminal 100, wherein the second conductive component is a negative conductive component, and the base material of the electrode terminal 100 of the second conductive component can be a copper material part, so that the electrode terminal 100 of the second conductive component has better conductivity, and can reduce the preparation cost of the electrode terminal 100, so that the heat generation of the battery using the cover plate assembly of the present application is further reduced. Specifically, the base material of the electrode terminal 100 is a copper material part, which means that the main structure of the electrode terminal 100 is a pure copper material part.

[0085] An anti-oxidation layer may be provided on the surface of the electrode terminal 100 of the second conductive component to protect the electrode terminal 100 of the second conductive component and prevent the electrode terminal 100 of the second conductive component from rusting and oxidation. Specifically, the anti-oxidation layer on the surface of the electrode terminal 100 of the second conductive component may be a nickel-plated layer.

[0086] The first conductive component can be a positive conductive component, and the electrode terminal 100 of the first conductive component can be made of aluminum, so that the electrode terminal 100 of the first conductive component has better conductivity and better structural strength. The second structural member 500 matched with the electrode terminal 100 of the first conductive component can be made of conductive plastic material, and the second structural member 500 matched with the electrode terminal 100 of the second conductive component can be made of insulating plastic material.

[0087] The present application also provides a battery, referring to Figure 1 As shown, the battery includes an electrode assembly 700, a switching sheet 800, a housing 900 and the above-mentioned cover assembly. The battery can be used as a power battery in a car or in other electrical devices, which is not limited in this application.

[0088] The shell 900 is the basic component of the battery of the present application. The shell 900 can provide a mounting base for at least some of the other components of the battery and protect at least some of the other components. The shell 900 can be made of metal material, so that the shell 900 has better structural strength, thereby making the durability and reliability of the shell 900 better. The shell 900 has a cavity, and the cavity in the shell 900 can be used to install at least some of the other components of the battery pack. The electrode assembly 700 can be arranged in the cavity of the shell 900, and the electrode assembly 700 can be electrically connected to the electrode terminal 100. Specifically, the electrode assembly 700 is electrically connected to the electrode terminal 100 through the adapter 800.

[0089] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

Claims

1. A conductive component, characterized in that: include: Electrode terminal (100); A conductive member (200) having a through hole penetrating the conductive member (200), wherein at least a portion of an inner wall of the through hole is not parallel to an axis of the through hole; The electrode terminal (100) is inserted into the through hole, and at least a portion of the inner wall of the through hole is in contact with the outer wall of the electrode terminal (100).

2. The conductive component according to claim 1, characterized in that: The through hole comprises a first mounting hole (210) and a second mounting hole (220); one end of the first mounting hole (210) is connected to the second mounting hole (220); the conductive member (200) has a first surface (230) and a second surface (240) opposite to each other in the thickness direction of the conductive member (200); the opening of the first mounting hole (210) facing away from the second mounting hole (220) is located on the first surface (230); the opening of the second mounting hole (220) facing away from the first mounting hole (210) is located on the second surface (240); and the minimum inner diameter of the first mounting hole (210) is smaller than the inner diameter of the second mounting hole (220); The electrode terminal (100) is inserted into the first mounting hole (210) and the second mounting hole (220), and at least a portion of the inner wall of the first mounting hole (210) and / or at least a portion of the inner wall of the second mounting hole (220) are in contact with the outer wall of the electrode terminal (100).

3. The conductive component according to claim 2, characterized in that: The first mounting hole (210) comprises a first hole section (211), one end of the first hole section (211) is connected to the second mounting hole (220), the inner diameter of the end of the first hole section (211) connected to the second mounting hole (220) is smaller than the inner diameter of the second mounting hole (220), and the inner diameter of the first hole section (211) gradually increases in a direction away from the second mounting hole (220).

4. The conductive component according to claim 3, characterized in that: The first mounting hole (210) further comprises a second hole section (212), the first hole section (211) being connected to the second mounting hole (220) via the second hole section (212), the inner diameter of the second hole section (212) being smaller than the inner diameter of the first hole section (211) and the inner diameter of the second mounting hole (220), and the side wall of the electrode terminal (100) being in contact with the inner wall of the second hole section (212).

5. The conductive component according to claim 4, characterized in that: The first mounting hole (210) further comprises a third hole section (213), the first hole section (211) is connected to the second hole section (212) via the third hole section (213), the inner diameter of the third hole section (213) is greater than the inner diameter of the second hole section (212) and is the same as the minimum inner diameter of the first hole section (211), and the side wall of the electrode terminal (100) is in contact with the inner wall of the third hole section (213).

6. The conductive component according to claim 2, characterized in that: The inner diameter of the second mounting hole (220) is 2 cm-3 cm, the difference between the minimum inner diameter of the first mounting hole (210) and the inner diameter of the second mounting hole (220) is 0.2 cm-0.5 cm, and the maximum inner diameter of the first mounting hole (210) is 3 cm-3.5 cm.

7. The conductive component according to claim 2, characterized in that: The ratio of the maximum inner diameter of the first mounting hole (210) to the inner diameter of the second mounting hole (220) is 1-1.5 to 1, and the ratio of the minimum inner diameter of the first mounting hole (210) to the inner diameter of the second mounting hole (220) is 0.7-1 to 1.

8. The conductive component according to claim 1, characterized in that: On the axis of the through hole, the inner diameter of the through hole gradually increases.

9. The conductive component according to any one of claims 1 to 8, characterized in that: The base material of the electrode terminal (100) is a copper material, and the electrode terminal (100) is connected to the conductive member (200) by welding.

10. The conductive component according to claim 9, characterized in that: The surface of the electrode terminal (100) has an anti-oxidation layer.

11. A cover plate assembly, characterized in that: Comprising a conductive component as claimed in any one of claims 2 to 8.

12. The cover plate assembly according to claim 11, characterized in that: The invention also includes a first structural member (300), a cover body (400), a second structural member (500) and a sealing member (600), wherein the first structural member (300) is arranged on one side of the cover body (400), the second structural member (500) is arranged on the other side of the cover body (400), the conductive member (200) is arranged on the side of the second structural member (500) facing away from the cover body (400), the electrode terminal (100) is passed through the first structural member (300), the cover body (400) and the second structural member (500), and the sealing member (600) is sleeved on the electrode terminal (100).

13. The cover plate assembly according to claim 11 or 12, characterized in that: The conductive component includes a first conductive component and a second conductive component, the second conductive component is a negative electrode conductive component, and the base material of the electrode terminal of the second conductive component is a copper material.

14. The cover plate assembly according to claim 13, characterized in that: The surface of the electrode terminal of the second conductive component has an anti-oxidation layer.

15. A battery, characterized in that: It comprises an electrode assembly (700), a transfer sheet (800) and a cover plate assembly according to any one of claims 11 to 14, wherein the electrode terminal (100) is electrically connected to the electrode assembly (700) via the transfer sheet (800).

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