Battery top cover, battery and electric equipment

Abstract

The utility model provides a battery top cover, a battery and electric equipment. The battery top cover comprises a top cover assembly, a first electrode terminal and a first electrode column, a first through hole is formed in the top cover assembly, the first electrode terminal is attached to the top cover assembly, the first electrode column penetrates through the first through hole, and a first end of the first electrode column is connected with the first electrode terminal; wherein the top cover assembly is provided with a containing groove, and orthographic projections, on the top cover assembly, of the connection redundancy parts of the first electrode column and the first electrode terminal are located in the containing groove. According to the battery top cover disclosed by the invention, the connecting redundant part is accommodated in the accommodating groove, so that the influence of the connecting redundant part on the flatness of the top cover assembly is improved, the influence of the connecting redundant part on the first electrode terminal and the first electrode column when the first electrode terminal and the first electrode column are mounted on the top cover assembly is improved, and the condition that the top cover assembly is uneven is avoided.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery top cover, a battery, and an electrical device. Background Art

[0002] The battery cover is one of the important parts of the battery. The battery cover generally includes the top cover, pole, connection terminal and other structures.

[0003] The battery top cover in the related art mainly connects the pole and the connection terminal by welding, mortise and tenon joints, etc., but the above connection methods easily lead to redundant structures at the connection between the pole and the connection terminal, affecting the flatness of the top cover. Utility Model Content

[0004] The embodiments of the present application provide a battery top cover, a battery and an electrical device, which can improve the technical problem that connecting the pole and the connecting terminal by welding, mortise and tenon joints, etc. easily leads to redundant structure at the connection between the pole and the connecting terminal, thereby affecting the flatness of the top cover.

[0005] In a first aspect, an embodiment of the present application provides a battery top cover, comprising:

[0006] The top cover assembly is provided with a first through hole;

[0007] a first electrode terminal attached to the top cover assembly;

[0008] a first electrode column, passing through the first through hole, and a first end of the first electrode column being connected to the first electrode terminal;

[0009] The top cover assembly is provided with a receiving groove, and the orthographic projection of the redundant connection portion between the first electrode column and the first electrode terminal on a plane of the top cover assembly close to the first electrode terminal is located in the receiving groove.

[0010] In one embodiment, a first clamping groove is provided on a side of the first electrode terminal facing the first electrode column, the first end of the first electrode column is clamped in the first clamping groove, and a side wall of the first clamping groove is connected to the first electrode column.

[0011] In one embodiment, the distance between the inner edge of the orthographic projection of the connection redundant portion on the plane of the side of the top cover assembly close to the first electrode terminal and the inner edge of the accommodating groove is greater than 0, and the distance between the outer edge of the orthographic projection of the connection redundant portion on the plane of the side of the top cover assembly close to the first electrode terminal and the outer edge of the accommodating groove is greater than 0.

[0012] In one embodiment, the central axis of the connection redundant portion coincides with the central axis of the accommodating groove.

[0013] In one embodiment, the top cover assembly includes a top cover sheet and a first insulating member, the first insulating member is disposed between the first electrode terminal and the top cover sheet, and the first insulating member is formed with the accommodating groove.

[0014] In one embodiment, the first electrode terminal includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is connected to the first electrode column, and the second connecting portion is provided on a side of the first connecting portion away from the first electrode column.

[0015] The first connection portion and the first electrode column are made of the same material, and the second connection portion and the first connection portion are made of a different material.

[0016] In one embodiment, a connecting surface between the first connecting portion and the second connecting portion is an arc-shaped surface.

[0017] In one embodiment, a first clamping groove is provided on a side of the first electrode terminal facing the first electrode column, the first end of the first electrode column is clamped in the first clamping groove, and the concave direction of the first clamping groove is the same as the concave direction of the arc surface.

[0018] In one embodiment, the thickness of the first connecting portion is greater than or equal to 0.5 mm; and / or the thickness of the second connecting portion is greater than or equal to 0.1 mm.

[0019] In one embodiment, the first electrode column includes an integrally formed connection block and a main body, the connection block is connected to one end of the main body, and the other end of the main body is passed through the first through hole, wherein the connection block extends outward along the circumference of the main body, the diameter of the connection block is larger than the diameter of the first through hole, and the connection block is connected to the first electrode terminal.

[0020] In one embodiment, the top cover assembly is formed with a second through hole, the battery top cover includes an integrally formed second electrode terminal and a second electrode column, the second electrode terminal is connected to the top cover assembly, and the second electrode column is passed through the second through hole.

[0021] In one embodiment, the redundant connection portion includes welding material or riveting protrusions.

[0022] In a second aspect, an embodiment of the present application provides a battery, comprising the battery top cover described above.

[0023] In a third aspect, an embodiment of the present application provides an electrical device comprising the battery described above.

[0024] Beneficial effects of the embodiments of the present application:

[0025] In an embodiment of the present application, when the first electrode column and the first electrode terminal are connected together, a redundant connection portion is present at the connection between the first electrode column and the first electrode terminal. Since the orthographic projection of the redundant connection portion on the plane of the top cover assembly near the first electrode terminal is located within the receiving groove, the redundant connection portion is located within the receiving groove. In other words, by utilizing the receiving groove to accommodate the redundant connection portion, the present application reduces the impact of the redundant connection portion on the flatness of the top cover assembly, mitigates the impact of the redundant connection portion on the first electrode terminal and the first electrode column when installed in the top cover assembly, and avoids unevenness in the top cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the battery top cover provided in an embodiment of the present application;

[0028] Figure 2 is a cross-sectional view of a battery top cover provided in an embodiment of the present application;

[0029] Figure 3 This application Figure 2 A schematic diagram of the structure at point A in the middle;

[0030] Figure 4 is a schematic structural diagram of a first battery terminal provided in an embodiment of the present application;

[0031] Figure 5 Schematic diagram of the structure of the connection between the first battery terminal and the first electrode column provided in an embodiment of the present application;

[0032] Figure 6 is a schematic structural diagram of a first electrode column provided in an embodiment of the present application;

[0033] Figure 7 It is a partial structural schematic diagram of the battery top cover provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0035] The following combination Figures 1 to 7 The present invention describes a battery top cover, a battery and an electrical device.

[0036] According to the embodiment of the first aspect of the present application, Figure 1 、 Figure 2 and Figure 3 The battery top cover includes a top cover assembly 1, a first electrode terminal 2 and a first electrode column 3. The top cover assembly 1 is provided with a first through hole 11. The first electrode terminal 2 is attached to the top cover assembly 1. The first electrode column 3 is passed through the first through hole 11, and the first end of the first electrode column 3 is connected to the first electrode terminal 2.

[0037] The top cover assembly 1 is provided with a receiving groove 12 , and the orthographic projection of the redundant connection portion between the first electrode column 3 and the first electrode terminal 2 on the plane of the top cover assembly 1 close to the first electrode terminal 2 is located in the receiving groove 12 .

[0038] According to the battery top cover of the embodiment of the present application, when the first electrode column 3 and the first electrode terminal 2 are connected together, there is a connection redundant portion at the connection between the first electrode column 3 and the first electrode terminal 2. Since the orthographic projection of the connection redundant portion on the plane of the side of the top cover assembly 1 close to the first electrode terminal 2 is located within the accommodating groove 12, the connection redundant portion will be located within the accommodating groove 12. That is, by utilizing the accommodating groove 12 to accommodate the connection redundant portion, the present application improves the impact of the connection redundant portion on the flatness of the top cover assembly 1, improves the impact of the connection redundant portion on the first electrode terminal 2 and the first electrode column 3 when they are installed on the top cover assembly 1, and avoids the top cover assembly 1 from becoming uneven.

[0039] In one embodiment of the present application, the connection redundancy portion includes welding material.

[0040] It is understood that when the first electrode column 3 and the first electrode terminal 2 are welded together, since the orthographic projection of the redundant connection portion between the first electrode column 3 and the first electrode terminal 2 on the plane of the side of the top cover assembly 1 near the first electrode terminal 2 is located within the receiving groove 12, solder paste and other welding materials during welding will drip into the receiving groove 12, and the solder material remaining at the connection between the first electrode column 3 and the first electrode terminal 2 will be located within the receiving groove. In other words, by using the receiving groove 12 to accommodate solder paste and other welding materials, the effect of solder paste and other welding materials on the flatness of the top cover assembly 1 is reduced, and the influence of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when installed on the top cover assembly 1 is reduced, thereby avoiding the top cover assembly 1 from having unevenness on both sides.

[0041] In the related art, solder paste and other welding materials will drip and accumulate on the side of the top cover assembly 1 facing the first electrode terminal 2, resulting in poor flatness of the side of the top cover assembly 1 facing the first electrode terminal 2. When the first electrode terminal 2 or the first electrode column 3 is installed on the top cover assembly 1, it will be affected by the accumulated welding material and the two sides will be uneven, affecting the quality of the battery top cover.

[0042] It can be understood that the receiving groove 12 is formed on the side of the top cover assembly 1 facing the first electrode terminal 2, so that the receiving groove 12 is opposite to the redundant connection part of the first electrode column 3 and the first electrode terminal 2, so that the receiving groove 12 can collect solder paste and other welding materials when the first electrode column 3 and the first electrode terminal 2 are welded, and prevent solder paste and other welding materials from dripping onto the first electrode terminal 2 or the connection surface between the first electrode column 3 and the top cover assembly 1, thereby improving the influence of dripping solder paste and other welding materials on the flatness of the top cover assembly 1, and improving the influence of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when they are installed on the top cover assembly 1, thereby avoiding the situation where the two sides of the top cover assembly 1 are uneven.

[0043] In some examples, the first electrode terminal 2 is a negative electrode terminal, and the first electrode column 3 is a negative electrode column.

[0044] At this time, the structure of the positive terminal and the positive electrode column can be the same as the structure of the negative terminal and the negative electrode column, that is, the positive terminal is attached to the top cover assembly 1, the positive electrode column is passed through the top cover assembly 1, and the positive electrode column and the positive terminal are connected by welding. The top cover assembly 1 is provided with a positive electrode accommodating structure, and the redundant connection portion between the positive electrode column and the positive terminal is located within the positive electrode accommodating structure in the orthographic projection of the top cover assembly 1. The positive electrode accommodating structure is used to accommodate the solder paste and welding materials that drip when the positive electrode column and the positive terminal are welded. The positive electrode column and the positive terminal are connected together by welding. Since the redundant connection portion between the positive electrode column and the positive terminal is located within the positive electrode accommodating structure in the orthographic projection of the top cover assembly 1, the solder paste and other welding materials during welding will drip into the positive electrode accommodating structure when dripping. That is to say, by utilizing the positive electrode containing structure to contain solder paste and other welding materials, the influence of dripping solder paste and other welding materials on the flatness of the top cover assembly 1 is improved, and the influence of solder paste and other welding materials on the positive terminal and the positive electrode column when installed on the top cover assembly 1 is improved, thereby avoiding the unevenness of the two sides of the top cover assembly 1.

[0045] In one embodiment of the present application, the connection redundancy portion includes a rivet protrusion.

[0046] It is understood that when the first electrode column 3 and the first electrode terminal 2 are riveted together, since the orthographic projection of the redundant connection portion between the first electrode column 3 and the first electrode terminal 2 on the plane of the side of the top cover assembly 1 close to the first electrode terminal 2 is located within the receiving groove 12, the rivet protrusions of the first electrode column 3 and the first electrode terminal 2 will be located within the receiving groove 12. In other words, by using the receiving groove 12 to accommodate the rivet protrusions, the impact of the rivet protrusions on the flatness of the top cover assembly 1 is reduced, avoiding the problem of unevenness on both sides of the top cover assembly 1.

[0047] In one embodiment of the present application, Figure 3 and Figure 5 The first electrode column 3 includes an integrally formed connection block 31 and a main body 32. The connection block 31 is connected to one end of the main body 32, and the other end of the main body 32 is inserted into the first through hole 11. The connection block 31 extends outward along the circumference of the main body 32. The diameter of the connection block 31 is larger than the diameter of the first through hole 11. The connection block 31 is connected to the first electrode terminal 2 so that the connection block 31 is attached to the top cover assembly 1. This prevents the redundant connection portion from being directly opposite the hole wall of the first through hole 11, facilitating the opening of the receiving groove 12.

[0048] In one embodiment of the present application, Figure 3 、 Figure 4 and Figure 5 A first clamping groove 21 is provided on the side of the first electrode terminal 2 facing the first electrode column 3 . The first end of the first electrode column 3 is clamped in the first clamping groove 21 . The side wall of the first clamping groove 21 is connected to the first electrode column 3 .

[0049] It is understood that the first electrode column 3 is snapped into the first snapping groove 21 of the first electrode terminal 2. The first snapping groove 21 can limit the first electrode column 3, thereby improving the stability of the connection between the electrode column and the first electrode terminal 2. The first snapping groove 21 is first used to limit the first electrode column 3, preventing relative movement between the first electrode terminal 2 and the first electrode column 3. At this point, the first electrode terminal 2 and the first electrode column 3 are then connected together by welding, ensuring the accuracy and quality of the welding. Alternatively, the first electrode terminal 2 and the first electrode column 3 can be connected by riveting, which facilitates the connection between the first electrode terminal 2 and the first electrode column 3.

[0050] In some examples, the sidewall of the first clamping groove 21 and the first electrode column 3 are fixedly connected together by welding to achieve a fixed connection between the first electrode terminal 2 and the first electrode column 3. Furthermore, welding is performed after the first electrode column 3 is clamped to the first clamping groove 21, which can increase the welding area between the first electrode column 3 and the first electrode terminal 2 and improve the connection stability between the first electrode column 3 and the first electrode terminal 2.

[0051] In some examples, the inner wall of the first clamping groove 21 abuts against the first electrode column 3, and the shape of the first electrode column 3 matches the shape of the inner wall of the first clamping groove 21. The inner wall of the first clamping groove 21 can be regular or irregular in shape.

[0052] In the embodiment of the present application, the side wall surface of the first electrode column 3 is connected to the side wall surface of the first clamping groove 21 by welding. The orthographic projection of the side wall surface of the first electrode column 3 on the top cover assembly 1 is within the receiving groove 12, and the orthographic projection of the side wall surface of the first clamping groove 21 on the top cover assembly 1 is also within the receiving groove 12. This ensures that the orthographic projection of the redundant connection portion between the electrode column and the first electrode terminal 2 on the top cover assembly 1 is within the receiving groove 12, and ensures that solder paste and other welding materials will drip into the annular groove when welding the first electrode column 3 and the first electrode terminal 2. This reduces the impact of dripping solder paste and other welding materials on the flatness of the top cover assembly 1, reduces the impact of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when they are installed on the top cover assembly 1, and avoids the top cover assembly 1 from having unevenness on both sides.

[0053] In an embodiment of the present application, the first electrode column 3 is, for example, a cylindrical structure, the first engaging groove 21 is a circular groove matching the first electrode column 3, and the receiving groove 12 is an annular groove. The outer wall surface of the first electrode column 3 and the inner wall surface of the first engaging groove 21 are connected together by welding. The orthographic projection of the outer wall surface of the first electrode column 3 on the top cover assembly 1 is within the annular groove, and the orthographic projection of the inner wall surface of the first engaging groove 21 on the top cover assembly 1 is also within the annular groove. Consequently, the orthographic projection of the redundant connection portion between the first electrode column 3 and the first electrode terminal 2 on the top cover assembly 1 is also within the annular groove. This ensures that solder paste and other welding materials drip into the annular groove during welding of the first electrode column 3 and the first electrode terminal 2, thereby reducing the impact of dripping solder paste and other welding materials on the flatness of the top cover assembly 1. This also reduces the impact of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when installed on the top cover assembly 1, thereby preventing unevenness on both sides of the top cover assembly 1.

[0054] In the embodiments of the present application, Figure 6 A second clamping groove 33 is formed on a side of the first electrode column 3 facing the first electrode terminal 2 , and the first electrode terminal 2 is clamped in the second clamping groove 33 .

[0055] It can be understood that the first electrode terminal 2 is clamped in the second clamping groove 33 of the first electrode column 3, and the second clamping groove 33 can limit the first electrode terminal 2 so that no relative movement occurs between the first electrode terminal 2 and the first electrode column 3, so that the first electrode terminal 2 and the first electrode column 3 can be connected together by welding, thereby ensuring the accuracy and quality of welding.

[0056] In one embodiment of the present application, the distance between the inner edge of the orthographic projection of the redundant connection portion on the plane of the side of the top cover assembly near the first electrode terminal 2 and the inner edge of the receiving groove 12 is greater than zero, and the distance between the outer edge of the orthographic projection of the redundant connection portion on the plane of the side of the top cover assembly 1 near the first electrode terminal 2 and the outer edge of the receiving groove 12 is greater than zero. The orthographic projection of the redundant connection portion on the top cover assembly 1 is spaced apart from the sidewall of the receiving groove 12, ensuring that the redundant connection portion is located within the receiving groove 12 and effectively preventing the redundant connection portion from being located outside the receiving groove 12.

[0057] In some examples, when the first electrode terminal 2 and the first electrode column 3 are welded together, it can be ensured that solder paste and other welding materials during welding of the first electrode terminal 2 and the first electrode column 3 will drip into the receiving groove 12, which can effectively prevent solder paste and other welding materials from dripping to positions outside the receiving groove 12, thereby improving the influence of dripping solder paste and other welding materials on the flatness of the top cover assembly 1, and improving the influence of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when they are installed on the top cover assembly 1, thereby avoiding the unevenness of the two sides of the top cover assembly 1, thereby ensuring the quality of the battery.

[0058] In some embodiments, the central axis of the redundant connection portion coincides with the central axis of the receiving groove 12. This ensures that the projected edge of the redundant connection portion on the top cover assembly 1 is at the same distance from the sidewall of the receiving groove 12. During soldering of the first electrode terminal 2 and the first electrode column 3, solder paste and other welding materials will drip as much as possible into the center of the receiving groove 12, ensuring that all solder paste and other welding materials drip into the receiving groove 12. This reduces the impact of dripping solder paste and other welding materials on the flatness of the top cover assembly 1, reduces the impact of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when installed on the top cover assembly 1, and prevents unevenness on both sides of the top cover assembly 1, thereby ensuring the quality of the battery.

[0059] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 The top cover assembly 1 includes a top cover sheet 13 and a first insulating member 14 . The first insulating member 14 is insulated and isolated between the first electrode terminal 2 and the top cover sheet 13 . The first insulating member 14 is formed with a receiving groove 12 .

[0060] It can be understood that the first electrode terminal 2 and the top cover sheet 13 are connected by the first insulating member 14, and a receiving groove 12 is formed at the first insulating member 14 to accommodate solder paste and other welding materials, while avoiding affecting the structure of the top cover sheet 13 and ensuring the structural stability of the top cover sheet 13.

[0061] In some examples, such as Figure 1 The first through hole 11 includes a third through hole 111 and a fourth through hole 112, the third through hole 111 and the fourth through hole 112 are coaxially arranged, the top cover sheet 13 is formed with a third through hole 111, the first insulating member 14 is formed with a fourth through hole 112, and the first electrode column 3 is passed through the fourth through hole 112 and the third through hole 111.

[0062] For example, the first insulating member 14 is a plastic member. Since the material of the plastic member is relatively soft, it is easier to form the receiving groove 12 on the plastic member than on a rigid member.

[0063] In the embodiments of the present application, Figure 1 The first insulating member 14 is formed with a third clamping groove 141 , the first electrode terminal 2 is clamped in the third clamping groove 141 , and the bottom of the third clamping groove 141 is formed with an accommodating groove 12 .

[0064] It is understandable that the third engaging groove 141 can limit the first electrode terminal 2 so that the first electrode terminal 2 is stably attached to the top cover assembly 1 and the first electrode terminal 2 is prevented from being offset.

[0065] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 The first electrode terminal 2 includes a first connecting portion 22 and a second connecting portion 23 connected to each other. The first connecting portion 22 is connected to the first electrode column 3, and the second connecting portion 23 is arranged on the side of the first connecting portion 22 away from the first electrode column 3. The first connecting portion 22 and the first electrode column 3 are made of the same material, and the second connecting portion 23 is made of a different material from the first connecting portion 22.

[0066] This embodiment uses a single material for the first electrode column 3, eliminating the need for multiple metal composite connections during electrode column production, thereby improving the structural stability of the electrode column. Furthermore, since the first connecting portion 22 and the first electrode column 3 are made of the same material, the safety risks associated with welding different materials can be avoided.

[0067] Exemplarily, the material of the first connecting portion 22 and the first electrode column 3 is, for example, copper, and the material of the second connecting portion 23 is, for example, aluminum.

[0068] In the embodiment of the present application, the second end of the first electrode column 3 is inserted into the first through-hole 11, and the connection surface between the first connecting portion 22 and the second connecting portion 23 and the second end of the first electrode column 3 are located on different sides of the top cover assembly 1. The second end of the first electrode column 3 is used to connect to the core package. This ensures that the interface between the first connecting portion 22 and the second connecting portion 23, i.e., the copper-aluminum interface, and the core package are located on different sides of the top cover assembly 1. This prevents the copper-aluminum interface from being immersed in the core package's electrolyte, thus preventing the core package's electrolyte from affecting the copper-aluminum interface and ensuring the stability of the copper-aluminum interface.

[0069] In one embodiment of the present application, the connecting surface between the first connecting portion 22 and the second connecting portion 23 is an arcuate surface, which increases the connecting area between the first connecting portion 22 and the second connecting portion 23 and improves the connection stability between the first connecting portion 22 and the second connecting portion 23. For example, the first connecting portion 22 and the second connecting portion 23 can be formed by cold heading of two separate metal plates or by cold heading of a single composite plate.

[0070] Illustratively, the first connection portion 22 protrudes toward one side of the second connection portion 23 .

[0071] In the embodiment of the present application, a side of the second connection portion 23 facing away from the first connection portion 22 is a plane, which facilitates subsequent connection between the first electrode terminal 2 and other components.

[0072] In one embodiment of the present application, a first snap-fit groove 21 is provided on a side of the first electrode terminal 2 facing the first electrode column 3 , and the first end of the first electrode column 3 is snap-fitted into the first snap-fit groove 21 . The recessed direction of the first snap-fit groove 21 is the same as the recessed direction of the arc surface.

[0073] It is understandable that, since the concave direction of the first clamping groove 21 is the same as the concave direction of the arc surface, the first clamping groove 21 can be processed while the first connecting portion 22 and the second connecting portion 23 are cold-forged, thereby improving processing efficiency.

[0074] In one embodiment of the present application, the thickness of the first connecting portion 22 is greater than or equal to 0.5 mm.

[0075] For example, the thickness of the first connection portion 22 is, for example, 0.5 mm, 0.6 mm, or 0.8 mm. It should be noted that the above is merely an example of the thickness of the first connection portion 22 and does not specifically limit the thickness of the first connection portion 22. The first connection portion 22 may also have any other suitable thickness.

[0076] In one embodiment of the present application, the thickness of the second connecting portion 23 is greater than or equal to 0.1 mm.

[0077] For example, the thickness of the second connection portion 23 is, for example, 0.1 mm or 0.3 mm. It should be noted that the above is merely an example of the thickness of the second connection portion 23 and does not specifically limit the thickness of the second connection portion 23. The thickness of the second connection portion 23 may also be within any other suitable range.

[0078] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 The top cover assembly 1 is formed with a second through hole 15 , and the battery top cover includes an integrally formed second electrode terminal 4 and a second electrode column 5 , the second electrode terminal 4 is connected to the top cover assembly 1 , and the second electrode column 5 is passed through the second through hole 15 .

[0079] It can be understood that the second electrode terminal 4 and the second electrode column 5 are integrally formed, which improves the connection stability between the second electrode terminal 4 and the second electrode column 5 while simplifying the production steps and increasing the production efficiency.

[0080] In the embodiment of the present application, the second electrode terminal 4 and the second electrode column 5 may also be non-integrally formed, and may be welded together. Figure 1 and Figure 7 The top cover assembly 1 includes a top cover sheet 13 and a second insulating member 16 . The second insulating member 16 is disposed between the second electrode terminal 4 and the top cover sheet 13 . The second insulating member 16 is formed with a receiving structure 161 .

[0081] It is understood that the second electrode terminal 4 and the top cover sheet 13 are connected by the second insulating member 16, and a containment structure 161 is formed on the second insulating member 16 to accommodate solder paste and other welding materials. By using the containment structure 161 to accommodate solder paste and other welding materials, the impact of dripping solder paste and other welding materials on the flatness of the top cover assembly 1 is reduced, and the impact of solder paste and other welding materials on the first electrode terminal 2 and the first electrode column 3 when installed in the top cover assembly 1 is reduced, avoiding the top cover assembly 1 from having unevenness on both sides, thereby ensuring the quality of the battery. At the same time, it can avoid affecting the structure of the top cover sheet 13, ensuring the structural stability of the top cover sheet 13.

[0082] In some examples, such as Figure 1 The second through hole 15 includes a fifth through hole 151 and a sixth through hole 152. The fifth through hole 151 and the sixth through hole 152 are coaxially arranged. The top cover sheet 13 is formed with the fifth through hole 151. The second insulating member 16 is formed with the sixth through hole 152. The second electrode column 5 is passed through the sixth through hole 152 and the fifth through hole 151.

[0083] Exemplarily, the second insulating member 16 is a plastic member, which can prevent electrical connection between the second electrode terminal 4 and the top cover sheet 13. Also, since the material of the plastic member is relatively soft, it is easier to form the accommodating structure 161 on the plastic member than on a rigid component.

[0084] According to an embodiment of the second aspect of the present application, a battery includes the battery top cover of the above embodiment. This embodiment does not impose specific requirements or special limitations on the structure of the battery. Exemplarily, the battery also includes an outer shell, a core pack is disposed within the outer shell, and the battery top cover is disposed on the outer shell.

[0085] According to the battery of the embodiment of the present application, during the production of the battery, when the first electrode column 3 and the first electrode terminal 2 are connected together, there is a connection redundancy portion at the connection between the first electrode column 3 and the first electrode terminal 2. Since the orthographic projection of the connection redundancy portion on the plane of the side of the top cover assembly 1 close to the first electrode terminal 2 is located within the accommodating groove 12, the connection redundancy portion will be located within the accommodating groove 12. That is, by utilizing the accommodating groove 12 to accommodate the connection redundancy portion, the present application improves the effect of the connection redundancy portion on the flatness of the top cover assembly 1, improves the effect of the connection redundancy portion on the first electrode terminal 2 and the first electrode column 3 when they are installed on the top cover assembly 1, avoids the top cover assembly 1 from being uneven, and thus ensures the quality of the battery.

[0086] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 The battery top cover includes a first sealing ring 6 , which is sleeved on the first electrode column 3 and abuts against the hole wall of the first through hole 11 .

[0087] It can be understood that the first sealing ring 6 enables the first electrode column 3 to be sealed with the wall of the first through hole 11, thereby preventing the electrolyte in the core package from overflowing through the connection between the first electrode column 3 and the wall of the first through hole 11, thereby improving the safety performance of the battery.

[0088] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 The battery top cover includes a second sealing ring 7 , which is sleeved on the second electrode column 5 and abuts against the wall of the second through hole 15 .

[0089] It can be understood that the second electrode column 5 is sealed and connected to the wall of the second through hole 15 by the second sealing ring 7, thereby preventing the electrolyte in the core package from overflowing through the connection between the second electrode column 5 and the wall of the second through hole 15, thereby improving the safety performance of the battery.

[0090] According to an embodiment of the third aspect of the present application, the electrical device includes the battery of the above embodiment, and the battery includes the battery top cover of the above embodiment.

[0091] According to the electrical device of the embodiment of the present application, when the first electrode column 3 and the first electrode terminal 2 of the battery top cover are connected, the orthographic projection of the redundant connection portion between the first electrode column 3 and the first electrode terminal 2 on the plane of the side of the top cover assembly 1 close to the first electrode terminal 2 is located within the accommodating groove 12, and the redundant connection portion is located within the accommodating groove 12. That is, by using the accommodating groove 12 to accommodate the redundant connection portion, the effect of the redundant connection portion on the flatness of the top cover assembly 1 is reduced, and the effect of the redundant connection portion on the first electrode terminal 2 and the first electrode column 3 when installed on the top cover assembly 1 is reduced, thus avoiding the unevenness of the top cover assembly 1, thereby ensuring the quality of the electrical device with a battery top cover.

[0092] It should be noted that the electrical equipment can be a vehicle, an aircraft, or a household appliance. It should be noted that the above is only an example of an electrical equipment and does not specifically limit the electrical equipment.

[0093] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery top cover, characterized in that: include: The top cover assembly is provided with a first through hole; a first electrode terminal attached to the top cover assembly; a first electrode column, passing through the first through hole, and a first end of the first electrode column being connected to the first electrode terminal; The top cover assembly is provided with a receiving groove, and the orthographic projection of the redundant connection portion between the first electrode column and the first electrode terminal on a plane of the top cover assembly close to the first electrode terminal is located in the receiving groove.

2. The battery top cover according to claim 1, characterized in that: A first clamping groove is provided on a side of the first electrode terminal facing the first electrode column. The first end of the first electrode column is clamped in the first clamping groove. The side wall of the first clamping groove is connected to the first electrode column.

3. The battery top cover according to claim 1, characterized in that: The distance between the inner edge of the orthographic projection of the connection redundant portion on the plane of the side of the top cover assembly close to the first electrode terminal and the inner edge of the accommodating groove is greater than 0, and the distance between the outer edge of the orthographic projection of the connection redundant portion on the plane of the side of the top cover assembly close to the first electrode terminal and the outer edge of the accommodating groove is greater than 0.

4. The battery top cover according to claim 1, characterized in that: The central axis of the connection redundant portion coincides with the central axis of the accommodating groove.

5. The battery top cover according to any one of claims 1 to 4, characterized in that: The top cover assembly includes a top cover sheet and a first insulating member, wherein the first insulating member is disposed between the first electrode terminal and the top cover sheet, and the first insulating member is formed with the accommodating groove.

6. The battery top cover according to any one of claims 1 to 4, characterized in that: The first electrode terminal includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is connected to the first electrode column, and the second connecting portion is provided on a side of the first connecting portion away from the first electrode column. The first connection portion and the first electrode column are made of the same material, and the second connection portion and the first connection portion are made of a different material.

7. The battery top cover according to claim 6, characterized in that: A connecting surface between the first connecting portion and the second connecting portion is an arc-shaped surface.

8. The battery top cover according to claim 7, characterized in that: A first clamping groove is provided on a side of the first electrode terminal facing the first electrode column. The first end of the first electrode column is clamped in the first clamping groove. The recessed direction of the first clamping groove is the same as that of the arc surface.

9. The battery top cover according to claim 6, characterized in that: The thickness of the first connecting portion is greater than or equal to 0.5 mm; and / or the thickness of the second connecting portion is greater than or equal to 0.1 mm.

10. The battery top cover according to any one of claims 1 to 4, characterized in that: The first electrode column includes an integrally formed connection block and a main body, the connection block is connected to one end of the main body, and the other end of the main body is passed through the first through hole, wherein the connection block extends radially outward along the main body, the diameter of the connection block is larger than the diameter of the first through hole, and the connection block is connected to the first electrode terminal.

11. The battery top cover according to any one of claims 1 to 4, characterized in that: The top cover assembly is formed with a second through hole. The battery top cover includes an integrally formed second electrode terminal and a second electrode column. The second electrode terminal is connected to the top cover assembly, and the second electrode column is passed through the second through hole.

12. The battery top cover according to any one of claims 1 to 4, characterized in that: The connection redundancy portion includes welding material or riveting protrusions.

13. A battery, characterized in that: The battery comprises a battery top cover according to any one of claims 1 to 12.

14. An electrical device, characterized in that: Comprising the battery of claim 13.

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