Cover plate assembly, battery and electric device

Abstract

The utility model provides a cover plate assembly, a battery and a power utilization device, and relates to the technical field of batteries. The cover plate assembly includes an electrode terminal and a conductive member. The electrode terminal can be electrically connected with the electrode assembly, the base material of the electrode terminal is a first metal, and the base material of the conductive part is a second metal, so that the electrode terminal and the conductive part are both metal parts. The conductive part is connected with the electrode terminal, so that the conductive part can be electrically connected with the electrode terminal, and the conductive part can have the overcurrent capability, so that the calorific value after the cover plate assembly is electrified can be reduced. The base material of the electrode terminal is the first metal, and the base material of the conductive part is the second metal, so that the base material of the electrode terminal is different from that of the conductive part, the electrode terminal can be prepared from a metal material with better conductivity and structural performance, and the conductive part can be prepared from a metal material with better conductivity and lower cost; therefore, the preparation cost of the cover plate assembly is reduced.

Description

Technical Field

[0001] The present application relates to a cover plate assembly, a battery and an electrical device, belonging to the technical field of batteries. Background Art

[0002] In current batteries, electrode terminals and conductive parts are both made of materials with relatively high cost and excellent conductive properties, which makes the manufacturing cost of the battery relatively high. Utility Model Content

[0003] The present application provides a cover plate assembly, a battery and an electrical device, which solve the problem of high manufacturing cost of the cover plate assembly of the battery in the related art.

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

[0005] Electrode terminal;

[0006] A conductive member connected to the electrode terminal;

[0007] The base material of the electrode terminal is a first metal, the base material of the conductive member is a second metal, and the first metal is different from the second metal.

[0008] In some embodiments, the conductive member is provided with a through hole, the through hole passes through the conductive member, at least a portion of the inner wall of the through hole is arranged at an angle with the axis of the through hole, the electrode terminal is passed through the through hole, and the outer wall of the electrode terminal contacts at least a portion of the inner wall of the through hole.

[0009] In some embodiments, the through hole includes a first hole portion, and the hole shape of the first hole portion is a truncated cone.

[0010] In some embodiments, the through hole also includes a second hole portion, one end of which is connected to the first hole portion, the aperture of the second hole portion is larger than the aperture of the first hole portion adjacent to one end of the second hole portion, and the aperture of the first hole portion gradually increases in a direction away from the second hole portion.

[0011] In some embodiments, the through hole further includes a third hole portion, both ends of which are respectively connected to the first hole portion and the second hole portion, and the aperture of the third hole portion is smaller than the aperture of the first hole portion and smaller than the aperture of the second hole portion.

[0012] In some embodiments, the through hole further includes a fourth hole portion, both ends of which are respectively connected to the third hole portion and the first hole portion, and the aperture of the fourth hole portion is larger than the aperture of the third hole portion and is the same as the minimum aperture of the first hole portion.

[0013] In some embodiments, an outer wall of the electrode terminal contacts an inner wall of the first hole portion, an inner wall of the second hole portion, an inner wall of the third hole portion, and an inner wall of the fourth hole portion.

[0014] In some embodiments, the pore size of the second hole portion is 2 cm-3 cm, the difference between the minimum pore size of the first hole portion and the pore size of the second hole portion is 0.2 cm-0.5 cm, and the maximum pore size of the first hole portion is 3 cm-3.5 cm.

[0015] In some embodiments, the ratio of the maximum pore size of the first pore portion to the pore size of the second pore portion is 1-1.5, and the ratio of the minimum pore size of the first pore portion to the pore size of the second pore portion is 0.7-1.

[0016] In some embodiments, the electrode terminal includes a first connecting portion and a second connecting portion connected to each other. In the thickness direction of the conductive member, the conductive member has a first outer wall, a through hole and a second outer wall. The first outer wall and the second outer wall are respectively located on both sides of the through hole. The electrode terminal is passed through the through hole. The first connecting portion is located in the through hole. The conductive member is provided with a notch portion located in the second outer wall. The notch portion is surrounded by the through hole, and the second connecting portion is located in the notch portion.

[0017] In some embodiments, the base material of the electrode terminal is a copper material, and the base material of the conductive member is an aluminum material.

[0018] In some embodiments, the surface of the electrode terminal has an anti-oxidation layer.

[0019] In some embodiments, it also includes a first insulating member, a cover body, a second insulating member and a sealing member, the cover body is arranged between the electrode terminal and the conductive member, the first insulating member is arranged between the conductive member and the cover body, the second insulating member is arranged between the electrode terminal and the cover body, the first insulating member, the cover body and the second insulating member are sleeved on the electrode terminal, and the sealing member is sleeved on the electrode terminal.

[0020] In some embodiments, the cover plate assembly includes a first cover plate assembly and a second cover plate assembly, the second cover plate assembly is a negative electrode cover plate assembly, the base material of the electrode terminal of the second cover plate assembly is a copper material, and the base material of the electrode terminal of the first cover plate assembly is an aluminum material.

[0021] In some embodiments, a surface of the electrode terminal of the second cap plate assembly has an anti-oxidation layer.

[0022] In a second 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.

[0023] In a third aspect, based on the above battery, the present application also proposes an electrical device, comprising the above battery.

[0024] In the cover plate assembly provided in the present application, the electrode terminal can be electrically connected to the electrode assembly, and the electrode assembly can be connected to an external electrical connector through the electrode terminal, so that the electrode assembly can be charged and discharged. The base material of the electrode terminal is a first metal, and the base material of the conductive member is a second metal, so that the electrode terminal and the conductive member are both metal members. The conductive member is connected to the electrode terminal, so that the conductive member and the electrode terminal can be electrically connected, so that the conductive member can have a current-carrying capacity, so that the heat generated by the cover plate assembly of the present application after power is turned on can be reduced. The base material of the electrode terminal is a first metal, and the base material of the conductive member is a second metal, so that the base material of the electrode terminal and the conductive member are different, so that the electrode terminal can be prepared using a metal material with better conductive properties and structural properties, and the conductive member can be prepared using a metal material with better conductive properties and relatively lower cost, thereby reducing the preparation cost of the cover plate assembly of the present application.

[0025] 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.

[0026] In the electric device proposed in the present application, since the above-mentioned battery is used, the heat generated by the electric device during operation is also smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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:

[0028] Figure 1 A schematic diagram of a battery according to an embodiment of the present application;

[0029] Figure 2 A schematic diagram of a cover plate assembly according to an embodiment of the present application;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0031] Figure 4 for Figure 3 A schematic diagram showing the enlarged display of the middle A area;

[0032] Figure 5A schematic diagram of a conductive member in one implementation of a battery module according to an embodiment of the present application;

[0033] Figure 6 A schematic diagram of an electrode terminal in one implementation of a battery module of an embodiment of the present application;

[0034] Figure 7 A schematic diagram of a conductive member in another implementation manner of a battery module according to an embodiment of the present application;

[0035] Figure 8 A schematic diagram of an electrode terminal in another implementation manner of a battery module of an embodiment of the present application;

[0036] Fig. 9 This is a schematic diagram of the exploded structure of the cover assembly of an embodiment of the present application.

[0037] Reference numerals:

[0038] 100 - electrode terminal, 110 - first boss, 120 - second boss, 130 - limiting groove, 140 - first connecting portion, 150 - second connecting portion,

[0039] 200 - conductive member, 210 - through hole, 211 - first hole portion, 212 - second hole portion, 213 - third hole portion, 214 - fourth hole portion, 220 - first outer wall, 230 - second outer wall, 240 - notch portion,

[0040] 300- first insulating member,

[0041] 400-cover body,

[0042] 500- second insulating member,

[0043] 600-Seals,

[0044] 700-Electrode Assembly,

[0045] 800-Adapter,

[0046] 900-housing. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] In current batteries, electrode terminals and conductive parts are both made of materials with relatively high cost and excellent conductive properties, which makes the manufacturing cost of the battery relatively high.

[0054] In the cover plate assembly provided in the present application, the electrode terminal can be electrically connected to the electrode assembly, and the electrode assembly can be connected to an external electrical connector through the electrode terminal, so that the electrode assembly can be charged and discharged. The base material of the electrode terminal is a first metal, and the base material of the conductive member is a second metal, so that the electrode terminal and the conductive member are both metal members. The conductive member is connected to the electrode terminal, so that the conductive member and the electrode terminal can be electrically connected, so that the conductive member can have a current-carrying capacity, so that the heat generated by the cover plate assembly of the present application after power is turned on can be reduced. The base material of the electrode terminal is a first metal, and the base material of the conductive member is a second metal, so that the base material of the electrode terminal and the conductive member are different, so that the electrode terminal can be prepared using a metal material with better conductive properties and structural properties, and the conductive member can be prepared using a metal material with better conductive properties and relatively lower cost, thereby reducing the preparation cost of the cover plate assembly of the present application.

[0055] 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.

[0056] In the electric device proposed in the present application, since the above-mentioned battery is used, the heat generated by the electric device during operation is also smaller.

[0057] The cover assembly, battery and electrical device provided by the present application are described in detail below in conjunction with specific embodiments.

[0058] The present application embodiment provides a cover plate assembly, referring to Figures 1 to 5 As shown, the cap plate assembly includes an electrode terminal 100 and a conductive member 200. The cap plate assembly can be electrically connected to the electrode assembly 700.

[0059] The conductive member 200 is a basic component of the cover assembly of the present application, and can provide a mounting base for at least some of the other components of the cover assembly, and can 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.

[0060] The base material of the electrode terminal 100 is a first metal, the base material of the conductive member 200 is a second metal, and the electrode terminal 100 and the conductive member 200 are both metal materials, so that when the electrode terminal 100 and the conductive member 200 are connected, the electrode terminal 100 and the conductive member 200 can be electrically connected. After the electrode terminal 100 is energized, the current can also pass through the conductive member 200, so that the conductive member 200 has a current-carrying capacity, which can protect the electrode terminal 100 and prevent the electrode terminal 100 from being damaged by excessive current. Specifically, the base material of the electrode terminal 100 is the first metal, which means that the main structure of the electrode terminal 100 is the first metal. The base material of the conductive member 200 is the second metal, which means that the main structure of the conductive member 200 is the second metal.

[0061] The base material of the electrode terminal 100 is the first metal, and the base material of the conductive member 200 is the second metal, so that the base materials of the electrode terminal 100 and the conductive member 200 are different, so that the conductive member 200 and the electrode terminal 100 can be made of different metal materials. Among them, the electrode terminal 100 can be made of a metal material with high conductivity and high cost, so that the electrical connection effect between the electrode assembly 700 and the external electrical connection structure through the electrode terminal 100 is better. The conductive member 200 can be made of a metal material with certain conductivity and relatively low cost, so that the conductive member 200 has a relatively low preparation cost when it has a current-carrying capacity, thereby reducing the preparation cost of the cover assembly of the present application.

[0062] In some embodiments, the conductive member 200 is provided with a through hole 210, which passes through the conductive member 200, so that the two side openings of the through hole 210 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 outer wall 220 and a second outer wall 230 located on opposite sides of the conductive member 200 in the thickness direction, and the two side openings of the through hole 210 are located on the first outer wall 220 and the second outer wall 230 respectively. The electrode terminal 100 is penetrated through the through hole 210, so that the through hole 210 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.

[0063] At least part of the inner wall of the through hole 210 is not parallel to the axis of the through hole 210, so that the apertures of different hole sections of the through hole 210 on its axis are different, so that a conical surface or a plane structure can be formed on the inner wall of the through hole 210, which can increase the inner surface area of ​​the inner wall of the through hole 210. In this way, the contact area between the electrode terminal 100 and the through hole 210 can be relatively larger, so that the conductive member 200 has a better current flow capacity, so that the heat generation of the cover plate assembly of the present application can be reduced. The through hole 210 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 apertures of different hole sections of the through hole 210 on its axis are different, and the inner wall of the through hole 210 can limit the conductive member 200 on the axis of the through hole 210, so that the connection and fixing effect of the conductive member 200 and the electrode terminal 100 is more reliable.

[0064] In some embodiments, the through hole 210 of the conductive member 200 of the present application includes a first hole portion 211, which is at least a portion of the through hole 210. The hole shape of the first hole portion 211 is a truncated cone, so that in the axial direction of the first hole portion 211, the aperture sizes of the various portions of the first hole portion 211 are different, so that the first hole portion 211 can be a structure with a gradually increasing aperture in the axial direction of the first hole portion 211. In this way, the surface area of ​​the inner wall of the first hole portion 211 is larger than the surface area of ​​the inner wall of the straight hole, so that the contact area between the conductive terminal and the conductive member 200 is larger, which can enhance the current carrying capacity of the conductive member 200 and make the heat generation of the cover plate assembly of the present application lower after being powered on.

[0065] In some embodiments, the through hole 210 of the conductive member 200 of the present application may also include a second hole portion 212, and one end of the second hole portion 212 may be connected to the first hole portion 211. The opening of the end of the first hole portion 211 facing away from the second hole portion 212 may be located at the first outer wall 220 of the conductive member 200, and the opening of the end of the second hole portion 212 facing away from the first hole portion 211 may be located at the second outer wall 230 of the conductive member 200, so that the through hole 210 passes through the conductive member 200 in the thickness direction of the conductive member 200.

[0066] The aperture of the second hole portion 212 is larger than the aperture of one end of the first hole portion 211 adjacent to the second hole portion 212, so that the aperture of the second hole portion 212 is larger than the aperture of at least part of the first hole portion 211. Accordingly, a step structure can be formed at the connection between the second hole portion 212 and the first hole portion 211, so that the second hole portion 212 can have an inner wall facing the same axial direction as the second hole portion 212. In this way, the second hole portion 212 not only has an inner wall in the circumferential direction, but also has an inner wall on the end side, so that the surface area of ​​the inner wall of the second hole portion 212 is larger. When the electrode terminal 100 is inserted into the second hole portion 212, the electrode terminal 100 can contact with more of the inner wall of the second hole portion 212, so that the contact area between the electrode terminal 100 and the conductive member 200 is larger, so that the current carrying capacity of the conductive member 200 is further improved, and the heat generated after the cover plate assembly is powered on is further reduced.

[0067] In the direction away from the second hole portion 212 , the diameter of the first hole portion 211 may be gradually increased, so that the hole shape of the first hole portion 211 may be truncated cone-shaped, so that the inner wall of the first hole portion 211 has a relatively larger surface area.

[0068] In some embodiments, the through hole 210 of the conductive part 200 of the present application may also be provided with a third hole portion 213, the two ends of the third hole portion 213 are respectively connected to the first hole portion 211 and the second hole portion 212, and the aperture of the third hole portion 213 is smaller than the aperture of the first hole portion 211 and smaller than the aperture of the second hole portion 212.

[0069] The aperture of the third hole portion 213 is smaller than the aperture of the second hole portion 212, so that the connection between the third hole portion 213 and the second hole portion 212 can form a step structure, and the second hole portion 212 can have an inner wall facing the same axial direction as the second hole portion 212. In this way, the second hole portion 212 not only has an inner wall in the circumferential direction, but also has an inner wall on the end side, so that the surface area of ​​the inner wall of the second hole portion 212 is larger. The aperture of the third hole portion 213 is smaller than the aperture of the first hole portion 211, so that the connection between the third hole portion 213 and the first hole portion 211 can also form a step structure. The third hole portion 213 can have an inner wall facing the same axial direction as the third hole portion 213. In this way, the third hole portion 213 not only has an inner wall in the circumferential direction, but also has an inner wall on the end side, so that the surface area of ​​the inner wall of the third hole portion 213 is larger.

[0070] By setting the third hole portion 213, the surface area of ​​the inner wall of the through hole 210 can be further increased, so that the contact area between the electrode terminal 100 and the conductive member 200 is further increased, thereby further enhancing the current carrying capacity of the conductive member 200, so that the heat generated by the cover plate assembly of the present application after being powered on is further reduced.

[0071] In some embodiments, the through hole 210 of the conductive member 200 of the present application may also be provided with a fourth hole portion 214, the two ends of the fourth hole portion 214 are respectively connected to the first hole portion 211 and the third hole portion 213, and the aperture of the fourth hole portion 214 is smaller than the aperture of the second hole portion 212, and is the same as the minimum aperture of the first hole portion 211. The aperture of the third hole portion 213 is smaller than the aperture of the fourth hole portion 214, so that the connection between the third hole portion 213 and the fourth hole portion 214 can also form a step structure. The third hole portion 213 may have an inner wall facing the same axial direction as the third hole portion 213. In this way, the third hole portion 213 not only has an inner wall in the circumferential direction, but also has an inner wall on the end side, so that the surface area of ​​the inner wall of the third hole portion 213 is larger. The aperture of the fourth hole 214 is set to be the same as the minimum aperture of the first hole 211 , so that the transition at the connection between the first hole 211 and the fourth hole 214 is more natural, thereby facilitating the processing of the fourth hole 214 and the first hole 211 in the conductive member 200 .

[0072] In some embodiments, when the electrode terminal 100 of the present application is inserted into the through hole 210 of the conductive member 200, the electrode terminal 100 contacts the inner walls of the first hole portion 211, the second hole portion 212, the third hole portion 213 and the fourth hole portion 214, so that the electrode terminal 100 is in full contact with the conductive member 200, so as to further reduce the heat generated when the cover plate assembly of the present application is powered on.

[0073] 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 hole portion 212 of the conductive member 200. The axial side outer wall of the first boss 110 may contact the inner wall of the second hole portion 212 in the thickness direction of the conductive member 200, so that the contact area between the electrode terminal 100 and the second hole portion 212 is relatively large. The circumferential side outer wall of the first boss 110 may also contact the circumferential side inner wall of the second hole portion 212, which can 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 cover plate assembly of the present application is further reduced.

[0074] 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 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 211.

[0075] The apertures of the second hole portion 212 and the fourth hole portion 214 located on both sides of the third hole portion 213 are larger than the third hole portion 213, so that a protrusion structure can be formed at the third hole portion 213 in the conductive member 200. Accordingly, 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 third hole portion 213, so that the connection effect between the electrode terminal 100 and the conductive member 200 is more stable and reliable.

[0076] In some embodiments, the aperture of the second hole portion 212 is 2 cm-3 cm, the difference between the minimum aperture of the first hole portion 211 and the aperture of the second hole portion 212 is 0.2 cm-0.5 cm, and the maximum aperture of the first hole portion is 3 cm-3.5 cm. Setting the sizes of the first hole portion 211 and the second hole portion 212 in this way can facilitate processing of the first hole portion 211 and the second hole portion 212 on the conductive member 200.

[0077] In some embodiments, the ratio of the maximum aperture of the first hole portion 211 to the aperture of the second hole portion 212 is 1-1.5, and the ratio of the minimum aperture of the first hole portion 211 to the aperture of the second hole portion 212 is 0.7-1. Setting the sizes of the first hole portion 211 and the second hole portion 212 in this way can facilitate processing of the first hole portion 211 and the second hole portion 212 on the conductive member 200.

[0078] In some embodiments, reference Figure 7 to Figure 8 As shown, the electrode terminal 100 includes a first connecting portion 140 and a second connecting portion 150 connected to each other. In the thickness direction of the conductive member 200, the conductive member 200 has a first outer wall 220, a through hole 210 and a second outer wall 230. The first outer wall 220 and the second outer wall 230 are respectively located on both sides of the through hole 210. The electrode terminal 100 is passed through the through hole 210, and the first connecting portion 140 is located in the through hole 210. The conductive member 200 is provided with a notch portion 240 located in the second outer wall 230. The notch portion 240 is surrounded by the through hole 210, and the second connecting portion 150 is located in the notch portion 240.

[0079] Since the notch 240 is arranged around the through hole 210, the aperture of the notch 240 is larger than the aperture of the through hole 210, so that the notch 240 not only has an inner wall located in the circumferential direction of the notch 240, but also has an inner wall facing the same direction as the axial direction of the through hole 210, so that the inner wall of the notch 240 has a larger surface area. The first connection portion 140 of the electrode terminal 100 is located in the through hole 210 so that the first connection portion 140 of the electrode terminal 100 is fully in contact with the through hole 210, and the second connection portion 150 of the electrode terminal 100 is located in the notch 240 so that the second connection portion 150 of the electrode terminal 100 is fully in contact with the notch 240. In this way, the contact area between the electrode terminal 100 and the conductive member 200 is relatively larger, thereby further enhancing the current carrying capacity of the conductive member 200, so that the heat generation of the cap plate assembly of the present application after power is turned on is further reduced.

[0080] 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 through hole 210 of the conductive member 200, so that the inner wall of the first hole portion 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.

[0081] Specifically, the side of the electrode terminal 100 facing away from the electrode assembly 700 may be located in the first hole portion 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.

[0082] The present application also provides a cover plate assembly, which can be used in a battery. Figure 1 , Figure 2 and Fig. 9As shown, it includes a first insulating member 300, a cover body 400, a second insulating member 500, a sealing member 600 and the above cover assembly. Among them, the first insulating member 300 can be covered on the outer wall of the electrode assembly 700 where the electrode terminal 100 is set, the cover body 400 is set between the electrode terminal 100 and the conductive member 200, the first insulating member 300 is set between the conductive member 200 and the cover body 400, and the second insulating member 500 is set between the electrode terminal 100 and the cover body 400. Correspondingly, the electrode terminal 100 can be sequentially penetrated by the first insulating member 300, the cover body 400, the second insulating member 500 and the conductive member 200. In this way, when preparing the cover assembly of the present application, the first insulating member 300, the cover body 400, the second insulating member 500 and the conductive member 200 can be prepared separately, and then the first insulating member 300, the cover body 400, the second insulating member 500, the sealing member 600 and the cover assembly 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.

[0083] The cover body 400 may be provided with a limiting groove 130 structure that matches the second insulating member 500, so that the second insulating member 500 can be embedded in the limiting groove 130 structure of the cover body 400. The second insulating member 500 may also be provided with a limiting groove 130 structure, so that the conductive member 200 may also be embedded in the limiting groove 130 structure of the second insulating member 500.

[0084] The first insulating member 300 may be made of an insulating plastic member, which can protect the electrode terminal 100 and the conductive member 200 .

[0085] In some embodiments, the number of cover plate assemblies in the cover plate assembly of the present application can be set to multiple, specifically two, and the two cover plate assemblies are respectively the first cover plate assembly and the second cover plate assembly, so that the battery using the cover plate assembly of the present application releases less heat during the charging and discharging process. The first cover plate assembly and the second cover plate assembly both have an electrode terminal 100, wherein the second cover plate assembly is a negative electrode cover plate assembly, and the base material of the electrode terminal 100 of the second cover plate assembly can be a copper material part, so that the electrode terminal 100 of the second cover plate assembly 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. An anti-oxidation layer can be provided on the surface of the electrode terminal 100 of the second cover plate assembly to protect the electrode terminal 100 of the second cover plate assembly and prevent the electrode terminal 100 of the second cover plate assembly from rusting and oxidation. Specifically, the anti-oxidation layer on the surface of the electrode terminal 100 of the second cover plate assembly can be a nickel-plated coating. The base material of the conductive element 200 may be an aluminum material, so that the conductive element 200 has better conductive and current-carrying performance and the manufacturing cost is relatively low.

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

[0087] The present application also proposes a battery, as shown in the reference figure, which 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 by the present 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] The embodiment of the present application further provides an electrical device, which includes the battery described above.

[0090] 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 cover plate assembly, characterized in that: include: Electrode terminal (100); A conductive member (200) connected to the electrode terminal (100); The base material of the electrode terminal (100) is a first metal, the base material of the conductive member (200) is a second metal, and the first metal is different from the second metal.

2. The cover plate assembly according to claim 1, characterized in that: The conductive member (200) is provided with a through hole (210), the through hole (210) passes through the conductive member (200), at least part of the inner wall of the through hole (210) is arranged at an angle with the axis of the through hole (210), the electrode terminal (100) is passed through the through hole (210), and the outer wall of the electrode terminal (100) contacts at least part of the inner wall of the through hole (210).

3. The cover plate assembly according to claim 2, characterized in that: The through hole (210) comprises a first hole portion (211), and the hole shape of the first hole portion (211) is a truncated cone.

4. The cover plate assembly according to claim 3, characterized in that: The through hole (210) further comprises a second hole portion (212), one end of the second hole portion (212) being connected to the first hole portion (211), the aperture of the second hole portion (212) being larger than the aperture of the first hole portion (211) at one end adjacent to the second hole portion (212), and the aperture of the first hole portion (211) gradually increases in a direction away from the second hole portion (212).

5. The cover plate assembly according to claim 4, characterized in that: The through hole (210) further comprises a third hole portion (213), the two ends of the third hole portion (213) being respectively connected to the first hole portion (211) and the second hole portion (212), and the aperture of the third hole portion (213) is smaller than the aperture of the first hole portion (211), and smaller than the aperture of the second hole portion (212).

6. The cover plate assembly according to claim 5, characterized in that: The through hole (210) further comprises a fourth hole portion (214), the two ends of the fourth hole portion (214) being respectively connected to the third hole portion (213) and the first hole portion (211), and the aperture of the fourth hole portion (214) is larger than the aperture of the third hole portion (213) and is the same as the minimum aperture of the first hole portion (211).

7. The cover plate assembly according to claim 6, characterized in that: The outer wall of the electrode terminal (100) contacts the inner wall of the first hole portion (211), the inner wall of the second hole portion (212), the inner wall of the third hole portion (213), and the inner wall of the fourth hole portion (214).

8. The cover plate assembly according to any one of claims 4 to 7, characterized in that: The aperture of the second hole portion (212) is 2cm-3cm, the difference between the minimum aperture of the first hole portion (211) and the aperture of the second hole portion (212) is 0.2cm-0.5cm, and the maximum aperture of the first hole portion (211) is 3cm-3.5cm.

9. The cover plate assembly according to any one of claims 4 to 7, characterized in that: The ratio of the maximum aperture of the first hole portion (211) to the aperture of the second hole portion (212) is 1-1.5, and the ratio of the minimum aperture of the first hole portion (211) to the aperture of the second hole portion (212) is 0.7-1.

10. The cover plate assembly according to claim 1, characterized in that: The electrode terminal (100) comprises a first connecting portion (140) and a second connecting portion (150) connected to each other. In the thickness direction of the conductive member (200), the conductive member (200) has a first outer wall (220), a through hole (210) and a second outer wall (230). The first outer wall (220) and the second outer wall (230) are respectively located on both sides of the through hole (210). The electrode terminal (100) is inserted into the through hole (210). The first connecting portion (140) is located in the through hole (210). The conductive member (200) is provided with a notch portion (240) located in the second outer wall (230). The notch portion (240) is arranged around the through hole (210). The second connecting portion (150) is located in the notch portion (240).

11. The cover plate assembly according to any one of claims 1 to 7 and 10, characterized in that: The base material of the electrode terminal (100) is a copper material, and the base material of the conductive member (200) is an aluminum material.

12. The cover plate assembly according to claim 10, characterized in that: The surface of the electrode terminal (100) has an anti-oxidation layer.

13. The cover plate assembly according to any one of claims 1 to 7 and 10, characterized in that: The invention also includes a first insulating member (300), a cover body (400), a second insulating member (500) and a sealing member (600); the cover body (400) is arranged between the electrode terminal (100) and the conductive member (200); the first insulating member (300) is arranged between the conductive member (200) and the cover body (400); the second insulating member (500) is arranged between the electrode terminal (100) and the cover body (400); the first insulating member (300), the cover body (400) and the second insulating member (500) are sleeved on the electrode terminal (100); and the sealing member (600) is sleeved on the electrode terminal (100).

14. The cover plate assembly according to claim 13, characterized in that: The cover plate assembly comprises a first cover plate assembly and a second cover plate assembly, the second cover plate assembly is a negative electrode cover plate assembly, the base material of the electrode terminal (100) of the second cover plate assembly is a copper material, and the base material of the electrode terminal (100) of the first cover plate assembly is an aluminum material.

15. The cover plate assembly according to claim 14, characterized in that: The surface of the electrode terminal (100) of the second cap plate assembly has an anti-oxidation layer.

16. 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 1 to 15, wherein the electrode terminal (100) is electrically connected to the electrode assembly (700) via the transfer sheet (800).

17. An electrical device, characterized in that: Comprising the battery of claim 16.

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