Electrode terminal, battery cover plate assembly and battery

Abstract

The utility model provides an electrode terminal, a battery cover plate assembly and a battery. The electrode terminal comprises a conductive end cover which is provided with an inner surface, and a first groove is formed from the inner surface to the interior of the conductive end cover; and the pole comprises a connecting end, and the connecting end extends into the first groove and is connected with the conductive end cover. According to the electric electrode terminal, the first groove is formed in the conductive end cover of the electric electrode terminal, and the connecting end of the pole extends into the first groove, so that the problem that the electrical performance of the electrode terminal is reduced due to the fact that the top end of the pole is exposed and oxidized is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an electrode terminal, a battery cover assembly and a battery. Background Art

[0002] In the electrode terminals of existing battery cover assemblies, through holes for copper poles to pass through are usually set on the conductive end caps, and riveting holes are set on the tops of the copper poles. The battery cover assembly is fixed by riveting from the outside of the cover from top to bottom. The riveting equipment and tooling directly contact the upper end surface of the copper pole, causing the upper end surface of the copper pole to deform, thereby fixing the battery cover assembly. In this battery cover assembly structure, the top of the copper pole is exposed to the air for a long time, and black oxides will be produced on the surface of the pole, which not only affects the appearance of the cover assembly, but also affects the electrical performance of the cover to a certain extent after being assembled into a battery. Utility Model Content

[0003] The embodiments of the utility model provide an electrode terminal, a battery cover assembly and a battery, aiming to solve the current technical problem that the copper pole of the battery cover assembly is easily exposed and oxidized.

[0004] In a first aspect, an embodiment of the present utility model provides an electrode terminal, comprising:

[0005] A conductive end cap having an inner surface, wherein a first groove is formed from the inner surface into the conductive end cap;

[0006] The pole comprises a connecting end, wherein the connecting end extends into the first groove and is connected to the conductive end cover.

[0007] In some embodiments, the first groove is disposed at a central position of the conductive end cap; and / or the first groove includes a bottom wall, and the connecting end abuts against the bottom wall.

[0008] In some embodiments, the depth of the first groove is 1.2-1.4 mm, and the diameter of the first groove is 4-6 mm.

[0009] In some embodiments, a welding forming portion is provided between the bottom wall and the connecting end, and the conductive end cover is connected to the connecting end via the welding forming portion.

[0010] In some embodiments, the first groove further includes a side wall connected to the bottom wall, and the side wall is threadedly connected to the connecting end.

[0011] In some embodiments, the conductive end cap further comprises an outer surface opposite to the inner surface, a second groove is formed in the conductive end cap from the outer surface, and the second groove is arranged opposite to the first groove;

[0012] The second groove corresponds to the first groove in position, and / or the groove width of the second groove is smaller than the groove width of the first groove.

[0013] In a second aspect, an embodiment of the utility model provides a battery cover plate assembly, comprising an electrode terminal as described in any of the above items, and further comprising a busbar, a lower plastic, a top cover sheet and an upper plastic, wherein the busbar, the lower plastic, the top cover sheet and the upper plastic are sequentially sleeved on the pole along a direction close to the conductive end cover.

[0014] In some embodiments, the pole further includes a support portion, the support portion and the connection end are located at opposite ends of the pole, and the busbar, the lower plastic, the top cover sheet and the upper plastic are sandwiched between the support portion and the conductive end cover.

[0015] In some embodiments, a rivet hole is formed on the support portion, and the rivet hole is located on a side of the support portion away from the conductive end cap.

[0016] In some embodiments, the battery cover assembly further includes a seal, which is sleeved on the pole, wherein:

[0017] The sealing member is an inverted T-shaped structure, comprising a first sealing portion and a second sealing portion, wherein the second sealing portion is vertically arranged at the end of the first sealing portion away from the conductive end cover, and the first sealing portion is arranged between the top cover sheet and the pole in a first direction;

[0018] The second sealing portion is disposed between the lower plastic and the pole in the first direction, and the second sealing portion is disposed between the top cover sheet and the lower plastic in the second direction;

[0019] The first direction is the radial direction of the pole, and the second direction is the axial direction of the pole.

[0020] In a third aspect, an embodiment of the present utility model provides a battery, comprising the electrode terminal as described above or comprising the battery cover plate assembly as described above.

[0021] The beneficial effects of the embodiments of the present utility model include:

[0022] In an embodiment of the utility model, the present application arranges a first groove structure on the conductive end cover of the battery cover assembly and extends the connecting end of the pole into the first groove, thereby avoiding the problem of decreased electrical performance of the cover due to oxidation of the exposed top end of the pole in the existing battery cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the electrode terminal provided in an embodiment of the utility model;

[0025] Figure 2 It is a schematic structural diagram of a conductive end cap provided in an embodiment of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a battery cover assembly provided by an embodiment of the utility model;

[0027] Figure 4 is a top view of a battery cover assembly provided in an embodiment of the utility model;

[0028] Figure 5 It is an exploded view of a battery cover assembly provided in an embodiment of the utility model.

[0029] In the figure:

[0030] 10-battery cover assembly, 1-conductive end cover, 11-inner surface, 12-outer surface, 13-first groove, 131-bottom wall, 132-side wall, 14-second groove, 2-upper plastic, 3-seal, 31-first sealing part, 32-second sealing part, 4-pole, 41-connecting end, 42-support part, 43-riveting hole, 5-top cover sheet, 6-lower plastic, 7-busbar, 8-welding forming part. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0032] In the description of the present utility model, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. In order to enable any technician in the field to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the utility model with unnecessary details. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0034] At present, the assembly method of the battery cover assembly is usually as follows: a through hole is set on the conductive end cover, a rivet hole is set on the top of the copper pole, the copper pole passes through the various loose parts and enters the through hole on the end cover, and the riveting equipment squeezes the rivet hole from top to bottom from the outside of the cover to deform the upper end surface of the copper pole, thereby fixing the battery cover assembly. In this structure, the top of the copper pole is exposed to the air for a long time, which will cause black oxide to form on the surface of the pole, affecting the appearance of the battery cover assembly. In addition, since the copper pole and the aluminum end cover conduct electricity only through surface contact, after being assembled into a battery, it will affect the electrical performance of the cover to a certain extent.

[0035] The embodiment of the utility model provides an electrode terminal, see Figure 1 and Figure 2 , Figure 1 It is a schematic diagram of the structure of the electrode terminal provided in an embodiment of the utility model; Figure 2The electrode terminal comprises: a conductive end cap 1 and a pole 4.

[0036] In this example, see Figure 1 and Figure 2 The conductive end cap 1 has an inner surface 11, and a first groove 13 is opened from the inner surface 11 into the conductive end cap 1. It can be understood that the inner surface 11 of the conductive end cap 1 is the surface of the conductive end cap 1 located inside the battery box after the battery cover assembly is installed in the battery box.

[0037] The pole 4 includes a connecting end 41 , which extends into the first groove 13 and is connected to the conductive end cover 1 .

[0038] It can be understood that by providing a first groove on the conductive end cover of the electrode terminal and extending the connecting end of the pole into the first groove, the problem of degradation of the electrical performance of the electrode terminal due to oxidation of the exposed top end of the pole can be avoided.

[0039] In a specific embodiment, the first groove 13 is disposed at the center of the conductive end cap 1 .

[0040] It can be understood that arranging the first groove 13 at the center of the conductive end cover 1 can facilitate the processing of the conductive end cover 1 and the connection between the pole 4 and the conductive end cover 1 .

[0041] In one embodiment, the depth of the first groove 13 is 1.2-1.4 mm, and the diameter of the first groove 13 is 4-6 mm.

[0042] In this embodiment, if Figure 1 As shown, the first groove 13 includes a bottom wall 131 , and the connecting end 41 abuts against the bottom wall 131 .

[0043] It can be understood that by making the connection end 41 of the pole 4 contact with the bottom wall 131 of the first groove 13, a gap between the pole 4 and the bottom wall of the first groove 13 can be avoided, thereby increasing the contact area between the pole 4 and the conductive end cover 1, which is beneficial to improving the conductivity between the two.

[0044] Further, in a specific embodiment, please refer to Figure 1 A welding forming portion 8 is provided between the bottom wall 131 of the first groove 13 and the end surface of the connecting end 41 , and the conductive end cover 1 is connected to the pole 4 via the welding forming portion 8 .

[0045] It can be understood that the pole 4 and the conductive end cover 1 can be connected by welding. Due to the small size of the battery cover assembly, the welding here is usually laser welding. The laser directly penetrates the conductive end cover 1 from the upper part of the conductive end cover 1 for welding. After welding, the connecting end 41 of the pole 4 is still covered by the conductive end cover 1 and will not be oxidized.

[0046] In another specific embodiment, Figure 2 As shown, the first groove 13 further includes a side wall 132 connected to the bottom wall 131 , and the side wall 132 is connected to the connecting end 41 via threads.

[0047] It can be understood that a thread is provided on the side wall of the first groove 13, and a matching thread is provided on the outer wall of the connecting end 41. The conductive end cap 1 and the pole 4 are connected by a thread. By setting the conductive end cap 1 and the pole 4 as a threaded connection, the assembly of the battery cover assembly can be facilitated. When one or more parts of the battery cover assembly have problems, the battery cover assembly can be easily disassembled and replaced. In addition, by adopting a threaded connection, the assembly process of the battery cover assembly no longer needs to use riveting equipment, which can simplify the assembly process and reduce the assembly cost.

[0048] In this embodiment, the conductive end cap 1 also includes an outer surface 12 opposite to the inner surface 11, and a second groove 14 is opened from the outer surface 12 into the conductive end cap 1, and the second groove 14 and the first groove 13 are arranged at intervals from each other. It can be understood that by providing the second groove 14 on the conductive end cap 1, the amount of conductive end cap material can be reduced while meeting the strength of the conductive end cap, thereby saving the production cost of the conductive end cap. The conductive end cap can be obtained by integral molding or casting. At the same time, by providing the second groove 14, the thickness of the conductive end cap can be reduced, so that the energy during laser welding can penetrate the conductive end cap.

[0049] Preferably, the second groove 14 corresponds to the axial position of the first groove 13 , and / or the groove width of the second groove 14 is smaller than the groove width of the first groove 13 .

[0050] In a second aspect, the present application embodiment provides a battery cover assembly 100, such as Figure 3-Figure 5 As shown, Figure 3 It is a structural schematic diagram of a battery cover assembly provided by an embodiment of the utility model; Figure 4 is a top view of a battery cover assembly provided in an embodiment of the utility model; Figure 5 It is an exploded view of a battery cover assembly provided in an embodiment of the utility model.

[0051] The battery cover plate assembly 100 includes the electrode terminal of the first aspect mentioned above, and also includes a busbar 7, a lower plastic 6, a top cover sheet 5 and an upper plastic 2. Along the direction close to the conductive end cover (i.e. from bottom to top), the busbar 7, the lower plastic 6, the top cover sheet 5 and the upper plastic 2 are clamped between the support portion 42 and the conductive end cover 1.

[0052] In some embodiments, the support portion 42 is formed with a rivet hole 43 , and the rivet hole 43 is located on a side of the support portion 42 facing away from the conductive end cap 1 .

[0053] It can be understood that during assembly, the pole 4 passes through the openings on the upper plastic 2, the top cover sheet 5, the lower plastic 6 and the busbar 7 in sequence, the riveting head of the riveting equipment acts on the riveting hole 43, and the connecting end 41 is deformed to form a support portion 42, thereby fixing the various parts of the battery cover assembly between the support portion 42 and the conductive end cover 1. The busbar 7, the lower plastic 6, the top cover sheet 5 and the upper plastic 2 can refer to the common structures in the art, and this application does not limit them.

[0054] In this embodiment, if Figure 3 As shown, the battery cover assembly further includes a seal 3 , which is sleeved on the outer wall of the pole 4 .

[0055] The seal 3 is an inverted T-shaped structure, including a first seal portion 31 and a second seal portion 32, wherein the second seal portion 32 is vertically arranged at the end of the first seal portion 31 away from the conductive end cover 1. In the radial direction of the pole 4, the first seal portion 31 is arranged between the top cover sheet 5 and the pole 4.

[0056] In the radial direction of the pole 4, the second sealing portion 32 is disposed between the lower plastic 6 and the pole 4. In the axial direction of the pole 4, the second sealing portion 32 is disposed between the top cover sheet 5 and the lower plastic 6.

[0057] In one embodiment, the pole 4 may be made of copper or a copper alloy. For example, the pole may be a copper pole or a copper alloy pole.

[0058] In one embodiment, the material of the conductive end cap 1 includes aluminum or aluminum alloy. For example, the end cap can be an aluminum conductive end cap or an aluminum alloy conductive end cap.

[0059] In a third aspect, an embodiment of the present application provides a battery, wherein the battery includes the electrode terminal of the first aspect or includes the battery cover assembly of the second aspect.

[0060] In one embodiment, the battery of the present application is a cylindrical battery.

[0061] In an embodiment of the utility model, the present application sets a first groove on the conductive end cover of the electrode terminal, extends the connecting end of the pole into the first groove, and fixes the pole and the conductive end cover by laser welding or threaded connection, thereby avoiding the problem of degradation of the electrical performance of the cover plate caused by oxidation of the exposed top end of the pole.

[0062] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An electrode terminal, characterized in that: include: A conductive end cap (1) having an inner surface (11), wherein a first groove (13) is provided from the inner surface (11) into the conductive end cap (1); A pole (4), comprising a connecting end (41), wherein the connecting end (41) extends into the first groove (13) and is connected to the conductive end cover (1); The first groove (13) is arranged at the center of the end cover (1); and / or, The first groove (13) comprises a bottom wall (131), and the connecting end (41) abuts against the bottom wall (131); A welding forming portion (8) is provided between the bottom wall (131) and the connecting end (41), and the conductive end cover (1) and the connecting end (41) are connected via the welding forming portion (8).

2. The electrode terminal according to claim 1, characterized in that: The depth of the first groove (13) is 1.2-1.4 mm, and the diameter of the first groove (13) is 4-6 mm.

3. The electrode terminal according to claim 1, characterized in that: The first groove (13) further comprises a side wall (132) connected to the bottom wall (131), and the side wall (132) is threadedly connected to the connecting end (41).

4. The electrode terminal according to claim 1, characterized in that: The conductive end cap (1) further comprises an outer surface (12) opposite to the inner surface (11), a second groove (14) is provided from the outer surface (12) into the conductive end cap (1), and the second groove (14) is arranged opposite to the first groove (13); The second groove (14) corresponds to the first groove (13) in position, and / or the groove width of the second groove (14) is smaller than the groove width of the first groove (13).

5. A battery cover assembly, characterized in that: It comprises an electrode terminal as described in any one of claims 1 to 4, and also comprises a busbar (7), a lower plastic (6), a top cover sheet (5) and an upper plastic (2), wherein the busbar (7), the lower plastic (6), the top cover sheet (5) and the upper plastic (2) are sequentially sleeved on the pole (4) in a direction close to the conductive end cover (1).

6. The battery cover assembly according to claim 5, characterized in that: The pole (4) further comprises a support portion (42), wherein the support portion (42) and the connection end (41) are located at opposite ends of the pole (4), and the busbar (7), the lower plastic (6), the top cover sheet (5) and the upper plastic (2) are sandwiched between the support portion (42) and the conductive end cover (1).

7. The battery cover assembly according to claim 6, characterized in that: The support portion (42) is formed with a rivet hole (43), and the rivet hole (43) is located on a side of the support portion (42) facing away from the conductive end cover (1).

8. The battery cover assembly according to claim 6, characterized in that: The battery cover assembly further comprises a sealing member (3), wherein the sealing member (3) is sleeved on the pole (4), wherein: The sealing member (3) is an inverted T-shaped structure, comprising a first sealing portion (31) and a second sealing portion (32), wherein the second sealing portion (32) is vertically arranged at an end of the first sealing portion (31) away from the conductive end cover (1), and the first sealing portion (31) is arranged between the top cover sheet (5) and the pole (4) in a first direction; The second sealing portion (32) is arranged between the lower plastic (6) and the pole (4) in the first direction, and the second sealing portion (32) is arranged between the top cover sheet (5) and the lower plastic (6) in the second direction; The first direction is the radial direction of the pole, and the second direction is the axial direction of the pole.

9. A battery, characterized in that: The battery comprises the electrode terminal as claimed in any one of claims 1 to 4 or comprises the battery cover assembly as claimed in any one of claims 5 to 8.

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