Cylindrical aluminum shell battery cover plate

Abstract

The utility model relates to the technical field of battery cover plates, in particular to a cylindrical aluminum shell battery cover plate, which comprises a current collecting disc, the current collecting disc is welded with two rivets, the section of each rivet is of an inverted T-shaped structure, an inner insulation pad is arranged above the rivets, an aluminum cover is arranged above the inner insulation pad, an outer insulation pad is arranged above the aluminum cover, a pole is arranged in the outer insulation pad, and the pole is connected with the aluminum cover. The terminal post, the outer insulation pad, the aluminum cover and the inner insulation pad are all provided with riveting holes, the rivet penetrates through the riveting holes, a sealing ring is arranged between the rivet and the aluminum cover, and the cover plate body is formed by riveting and pressing the terminal post, the outer insulation pad, the aluminum cover, the inner insulation pad and the sealing ring through the rivet; the pole, the outer insulation pad, the aluminum cover, the inner insulation pad and the sealing ring assembly are riveted and pressed into the cover plate body by using double rivets, so that the firmness and tightness of assembly riveting are ensured, the conductivity is improved, the infirm contact of the assemblies is avoided, the air tightness of the cover plate body is improved, and the service life of the battery is further prolonged.

Description

Technical Field

[0001] The utility model relates to a battery cover plate, in particular to a cylindrical aluminum shell battery cover plate, belonging to the technical field of battery cover plates. Background Art

[0002] Cylindrical aluminum shell batteries use a full-ear end face welding process, with low internal resistance, good conductivity, excellent rate performance and cycle performance, good cell consistency, and high group efficiency. They are widely used in household energy storage, outdoor energy storage, industrial and commercial energy storage, communication stations, low-speed two-wheeled vehicles, three-wheeled vehicles, and electric vehicles. The cover plate is a key component of the cylindrical aluminum shell battery and is a bridge for conductivity between the internal winding core of the battery and the external circuit.

[0003] The existing aluminum shell battery cover generally adopts a single riveted structure. The rivet is located in the middle of the cover pole. A riveting gap will be left between the rivet and the pole plane, which will affect the battery group welding, resulting in poor welding such as cold welding and fire, resulting in reduced battery product quality. Utility Model Content

[0004] The purpose of the utility model is to provide a cylindrical aluminum shell battery cover plate in order to solve the above-mentioned problem. The pole, outer insulating pad, aluminum cover, inner insulating pad, and sealing ring assembly are riveted and pressed into a cover plate body using double rivets, thereby ensuring the firmness and tightness of the riveting of the assembly, increasing the conductivity, avoiding loose contact of the assembly, improving the airtightness of the cover plate body, and thereby increasing the service life of the battery.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a cylindrical aluminum shell battery cover plate, comprising a current collecting plate, a cover plate body welded on the current collecting plate, the cover plate body comprising two rivets, the current collecting plate is welded to the two rivets, the cross-section of the rivet is an inverted T-shaped structure, an inner insulating pad is provided above the rivet, an aluminum cover is provided above the inner insulating pad, an outer insulating pad is provided above the aluminum cover, a pole is provided inside the outer insulating pad, rivet holes are provided on the pole, the outer insulating pad, the aluminum cover and the inner insulating pad, the rivet runs through the rivet hole, a sealing ring is provided between the rivet and the aluminum cover, and the cover plate body is formed by riveting and pressing the pole, the outer insulating pad, the aluminum cover, the inner insulating pad and the sealing ring together with rivets.

[0006] Preferably, a groove is provided inside the outer insulating pad, and the inner diameter of the groove is equal to the outer diameter of the pole.

[0007] Preferably, the aluminum cover is provided with a liquid injection hole, the inner insulating pad is provided with a space to avoid the liquid injection hole, and the upper surface of the aluminum cover is provided with a QR code.

[0008] Preferably, the sealing ring is partially embedded in the protruding column of the rivet, and the outer diameter of the sealing ring is equal to the diameter of the riveting hole on the aluminum cover.

[0009] Preferably, four circular positioning holes are provided at the bottom end of the aluminum cover, and four circular bosses are provided on the inner insulating pad.

[0010] Preferably, the size of the circular positioning hole is consistent with the size of the circular boss, and the circular boss is plugged into the circular positioning hole.

[0011] Preferably, the current collecting plate is provided with two groups of arc-shaped arrays of laser welding points, and the current collecting plate is welded to the lower end surface of the rivet through the laser welding points.

[0012] The beneficial effects of the utility model are as follows: the current collecting plate is welded with two rivets, the cross section of the rivet is an inverted T-shaped structure, an inner insulating pad is arranged above the rivet, an aluminum cover is arranged above the inner insulating pad, an outer insulating pad is arranged above the aluminum cover, a pole is arranged inside the outer insulating pad, rivet holes are opened on the pole, the outer insulating pad, the aluminum cover and the inner insulating pad, the rivet runs through the rivet hole, a sealing ring is arranged between the rivet and the aluminum cover, and the cover body is formed by riveting and pressing the pole, the outer insulating pad, the aluminum cover, the inner insulating pad and the sealing ring through rivets; the pole, the outer insulating pad, the aluminum cover, the inner insulating pad and the sealing ring assembly are riveted and pressed into the cover body using double rivets, so as to ensure the firmness and tightness of the riveting of the assembly, increase the conductive performance, avoid loose contact of the assembly, improve the air tightness of the cover body, and thus improve the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the connection structure between the current collecting plate and the laser welding point of the utility model;

[0015] Figure 3 It is an exploded view of the cover plate body of the utility model;

[0016] Figure 4 It is a schematic diagram of the connection structure between the aluminum cover and the circular positioning hole of the utility model.

[0017] In the figure: 1. current collecting plate; 2. cover plate body; 201. pole; 202. outer insulating pad; 203. aluminum cover; 204. inner insulating pad; 205. sealing ring; 206. rivet; 3. laser welding point; 4. injection hole; 5. QR code; 6. circular positioning hole; 7. avoidance position; 8. circular boss. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 As shown, a cylindrical aluminum shell battery cover plate includes a current collecting plate 1, a cover plate body 2 is welded on the current collecting plate 1, the cover plate body 2 includes two rivets 206, the current collecting plate 1 is welded with the two rivets 206, the cross section of the rivet 206 is an inverted T-shaped structure, an inner insulating pad 204 is arranged above the rivet 206, an aluminum cover 203 is arranged above the inner insulating pad 204, and an outer insulating pad 202 is arranged above the aluminum cover 203, A pole 201 is provided inside the outer insulating pad 202. Riveting holes are provided on the pole 201, the outer insulating pad 202, the aluminum cover 203, and the inner insulating pad 204. The rivet 206 passes through the rivet hole. A sealing ring 205 is provided between the rivet 206 and the aluminum cover 203. The cover plate body 2 is formed by riveting and pressing the pole 201, the outer insulating pad 202, the aluminum cover 203, the inner insulating pad 204, and the sealing ring 205 together by the rivet 206.

[0020] As a technical optimization solution of the utility model, a groove is provided inside the outer insulating pad 202 , and the inner diameter of the groove is equal to the outer diameter of the pole 201 , so that the pole 201 and the outer insulating pad 202 are easier to assemble.

[0021] As a technical optimization solution of the utility model, the aluminum cover 203 is provided with a liquid injection hole 4, the inner insulating pad 204 is provided with a space 7 for avoiding the liquid injection hole 4, the upper surface of the aluminum cover 203 is provided with a QR code 5, the aluminum cover 203 is provided with a liquid injection hole 4, the inner insulating pad 204 is provided with a space 7 for avoiding the liquid injection hole 4 to facilitate the injection of electrolyte into the battery, and a QR code 5 is provided on the front of the aluminum cover 203 to facilitate battery traceability.

[0022] As a technical optimization solution of the utility model, the sealing ring 205 is partially embedded in the protrusion of the rivet 206, and the outer diameter of the sealing ring 205 is equal to the diameter of the riveting hole on the aluminum cover 203, so that the rivet 206 is insulated from the aluminum cover 203 to avoid conduction.

[0023] As a technical optimization solution of the utility model, four circular positioning holes 6 are provided at the bottom end of the aluminum cover 203, and four circular bosses 8 are provided on the inner insulating pad 204; the size of the circular positioning holes 6 is consistent with the size of the circular bosses 8, and the circular bosses 8 are plugged into the circular positioning holes 6, so that the inner insulating pad 204 and the aluminum cover 203 are positioned, which is more conducive to assembly.

[0024] As a technical optimization solution of the utility model, two groups of arc-shaped arrays of laser welding points 3 are provided on the collecting plate 1, and the collecting plate 1 is welded to the lower end surface of the rivet 206 through the laser welding points 3, so as to facilitate the welding of the battery cover body 2 and the collecting plate 1.

[0025] When the utility model is in use, the pole 201 component is set to a rectangular prism shape, and the two ends of the pole 201 are provided with through rivet holes for convenient riveting. A sufficiently large area is reserved in the middle of the end face of the pole 201 to facilitate the welding of batteries in groups; the two ends of the outer insulating pad 202 component are provided with through rivet holes for convenient riveting, and the interior is set to a groove structure, and the inner diameter of the groove is consistent with the outer diameter of the pole 201, so that the pole 201 and the outer insulating pad 202 are easier to assemble; the outer insulating pad 202 insulates the pole 201 from the aluminum cover 203 to avoid conduction; the aluminum cover 203 is provided with a liquid injection hole 4, and the inner insulating pad 204 is provided with a space 7 for avoiding the injection of electrolyte into the battery, the aluminum cover 203 is provided with a through rivet hole for convenient riveting, the front of the aluminum cover 203 is provided with a QR code 5 for convenient battery tracing, and the back of the aluminum cover 203 is provided with a concave circular positioning hole 6, so that the inner insulating pad 204 can be assembled with it. The aluminum cover 203 is positioned; the inner insulating pad 204 insulates the aluminum cover 203 from the rivet 206 and the current collecting plate 1 to avoid conduction; the inner insulating pad 204 is provided with a through rivet hole for easy riveting, and a circular boss 8 is provided on the front of the inner insulating pad 204, and the size of the circular boss 8 is consistent with the size of the concave circular positioning hole 6 on the back of the aluminum cover 203. When the cover body 2 is assembled, the circular boss 8 of the inner insulating pad 204 will be embedded in the concave circular positioning hole 6 on the back of the aluminum cover 203. Position hole 6 is used to position the inner insulating pad 204 and the aluminum cover 203, which is more convenient for assembly; the sealing ring 205 is embedded in the protruding column of the rivet 206, so that the rivet 206 and the aluminum cover 203 are insulated to avoid conductivity; the protruding column of the rivet 206 passes through the sealing ring 205, the inner insulating pad 204, the aluminum cover 203, the outer insulating pad 202, and the pole 201 and is riveted and pressed into a cover plate body 2; the collecting plate 1 is welded to the circular surface of the rivet 206 through the laser welding point 3.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cylindrical aluminum shell battery cover plate, comprising a current collecting plate (1), characterized in that: A cover plate body (2) is welded to the current collecting plate (1), the cover plate body (2) comprises two rivets (206), the current collecting plate (1) is welded to the two rivets (206), the cross section of the rivet (206) is an inverted T-shaped structure, an inner insulating pad (204) is provided above the rivet (206), an aluminum cover (203) is provided above the inner insulating pad (204), an outer insulating pad (202) is provided above the aluminum cover (203), and the inner part of the outer insulating pad (202) is provided A pole (201), wherein the pole (201), an outer insulating pad (202), an aluminum cover (203), and an inner insulating pad (204) are all provided with rivet holes, the rivet (206) passes through the rivet hole, a sealing ring (205) is provided between the rivet (206) and the aluminum cover (203), and the cover plate body (2) is formed by riveting and pressing the pole (201), the outer insulating pad (202), the aluminum cover (203), the inner insulating pad (204), and the sealing ring (205) together with the rivet (206).

2. A cylindrical aluminum shell battery cover according to claim 1, characterized in that: The outer insulating pad (202) is provided with a groove inside, and the inner diameter of the groove is equal to the outer diameter of the pole (201).

3. A cylindrical aluminum shell battery cover according to claim 1, characterized in that: The aluminum cover (203) is provided with a liquid injection hole (4), the inner insulating pad (204) is provided with a clearance position (7) for the liquid injection hole (4), and the upper surface of the aluminum cover (203) is provided with a QR code (5).

4. A cylindrical aluminum shell battery cover according to claim 3, characterized in that: The sealing ring (205) is partially embedded in the protruding column of the rivet (206), and the outer diameter of the sealing ring (205) is equal to the diameter of the riveting hole on the aluminum cover (203).

5. The cylindrical aluminum shell battery cover according to claim 1, characterized in that: Four circular positioning holes (6) are provided at the bottom end of the aluminum cover (203), and four circular bosses (8) are provided on the inner insulating pad (204).

6. A cylindrical aluminum shell battery cover according to claim 5, characterized in that: The size of the circular positioning hole (6) is consistent with the size of the circular boss (8), and the circular boss (8) is plugged into the circular positioning hole (6).

7. A cylindrical aluminum shell battery cover according to claim 6, characterized in that: The current collecting plate (1) is provided with two groups of arc-shaped arrays of laser welding points (3), and the current collecting plate (1) is welded to the lower end surface of the rivet (206) via the laser welding points (3).

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