Battery top cover structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery top cover structure and a battery, the battery top cover structure comprises a top cover sheet and a positive pole column, the top of the top cover sheet is sunken downwards to form a positive pole mounting groove; an anode boss is formed on the periphery of the anode column and is embedded into the anode mounting groove, and the anode column is electrically connected with the top cover plate; the positive electrode boss is embedded in the positive electrode mounting groove, the positive electrode column is electrically connected with the top cover plate, when the positive electrode column is machined, the positive electrode column can be directly manufactured in a pier pressing mode, the material cost is saved, the production efficiency is improved, a traditional upper plastic part is omitted, the material cost is reduced, the assembly steps are simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of batteries, and specifically, to a battery top cover structure and a battery. Background Art

[0002] Batteries are widely used in new energy electric vehicles, energy storage, mobile devices and other related products. With the rise of new energy, battery technology and demand are growing rapidly.

[0003] In the prior art, the battery includes a battery top cover structure, which is sealed on the battery shell, including a top cover sheet, a positive electrode column and a negative electrode column, etc. The positive electrode column is mostly formed by machining, and during the processing, material waste occurs, resulting in defects such as low material utilization, high material cost and low processing efficiency. Utility Model Content

[0004] The utility model aims to provide a battery top cover structure, aiming to solve the problem of high material cost of the battery top cover structure in the prior art.

[0005] The utility model is implemented in this way: the battery top cover structure includes a top cover sheet and a positive electrode column, the top of the top cover sheet is recessed downward to form a positive electrode mounting groove; a positive electrode boss is formed on the outer periphery of the positive electrode column, the positive electrode boss is embedded in the positive electrode mounting groove, and the positive electrode column is electrically connected to the top cover sheet.

[0006] Furthermore, the outer periphery of the positive electrode boss abuts against the outer periphery of the positive electrode mounting groove to form a positive electrode outer periphery bonding surface, and the positive electrode outer periphery bonding surface is welded and fixedly connected.

[0007] Furthermore, the middle portion of the positive electrode mounting groove is recessed downward to form a positive electrode recessed groove, a positive electrode step is formed at the bottom of the positive electrode mounting groove, the positive electrode step is formed on the outer periphery of the positive electrode recessed groove, and the positive electrode boss abuts against the positive electrode step; the bottom of the positive electrode column is recessed upward to form a column groove, and the column groove is arranged corresponding to the positive electrode recessed groove.

[0008] Furthermore, the bottom of the top cover sheet protrudes downward to form a protruding portion connected to the battery cell, and the protruding portion and the concave groove are arranged opposite to each other in an upper and lower direction.

[0009] Furthermore, the battery top cover structure also includes a negative electrode assembly inserted into the top cover sheet, the negative electrode assembly includes a negative electrode plate and a negative electrode column, an upper plastic part is provided between the negative electrode plate and the top cover sheet to insulate the negative electrode plate from the top cover sheet; a lower plastic part and a sealing ring are provided between the negative electrode column and the top cover sheet to insulate the negative electrode column from the top cover sheet, and the negative electrode column and the negative electrode plate are fixedly connected by a flange structure.

[0010] Furthermore, the flange structure includes a negative electrode mounting groove formed in the negative electrode plate and a negative electrode flange formed on the outer periphery of the negative electrode column, the negative electrode mounting groove has negative electrode steps arranged in a ring shape, the negative electrode column is passed through the negative electrode plate and embedded in the negative electrode mounting groove, and the negative electrode flange abuts against the negative electrode step.

[0011] Furthermore, an upper groove is formed on the negative electrode plate, and the upper groove is located above the negative electrode mounting groove. The outer periphery of the negative electrode plate abuts against the outer periphery of the negative electrode mounting groove to form a negative electrode outer periphery bonding surface, and the negative electrode outer periphery bonding surface is welded and fixed, and the negative electrode outer periphery bonding surface is exposed in the upper groove.

[0012] Furthermore, a ring-shaped lower step is formed at the lower portion of the negative electrode plate, and the upper plastic part cooperates with the lower step to be relatively fixed.

[0013] Furthermore, a lower plastic part is provided at the bottom of the top cover piece, and a protruding boss is provided at the bottom of the top cover piece, the boss passes through the lower plastic part, a column step is formed on the periphery of the boss, and the column step is supported on a side of the lower plastic part away from the top cover piece.

[0014] Compared with the prior art, the battery top cover structure provided by the utility model has a positive electrode boss embedded in the positive electrode mounting groove, and the positive electrode column is electrically connected to the top cover sheet. When processing the positive electrode column, it can be directly manufactured by a piercing method, which saves material costs and improves production efficiency. It also eliminates the traditional upper plastic parts, reduces material costs, simplifies assembly steps, and improves production efficiency.

[0015] The utility model also provides a battery, comprising the battery top cover structure.

[0016] Compared with the prior art, the battery provided by the utility model saves material costs and improves production efficiency due to the battery top cover structure, thereby reducing the cost of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the battery top cover structure provided by the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the cooperation between the positive pole and the top cover sheet provided by the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the cooperation between the negative electrode assembly and the top cover sheet provided by the utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of the cooperation between the convex column and the lower plastic part provided by the utility model;

[0021] In the figure: top cover sheet 100, boss 101, column step 102; positive electrode column 200, positive electrode boss 201, positive electrode recessed groove 202, protruding portion 203, positive electrode peripheral fitting surface 204, positive electrode step 205, column groove 206; negative electrode assembly 300, negative electrode plate 301, negative electrode column 302, upper plastic part 303, negative electrode flange 304, negative electrode step 305, lower plastic part 306, lower step 307, sealing ring 308. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is 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 direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Reference Figure 1-4 As shown, it is a preferred embodiment provided by the utility model.

[0026] The battery top cover structure includes a top cover sheet 100 and a positive electrode column 200. The top of the top cover sheet 100 is recessed downward to form a positive electrode mounting groove. A positive electrode boss 201 is formed on the periphery of the positive electrode column 200, and the positive electrode boss 201 is embedded in the positive electrode mounting groove. The positive electrode column 200 is electrically connected to the top cover sheet 100, which can be achieved by direct abutment. Of course, electrical connection can also be achieved in other ways.

[0027] The positive electrode column 200 and the top cover sheet 100 form an integral structure, and the battery cells in the battery shell can be directly connected to the top cover sheet 100 to achieve connection with the positive electrode column 200. After power is turned on, the entire battery shell acts as a positive electrode to increase the potential.

[0028] In the battery top cover structure provided above, the positive electrode boss 201 is embedded in the positive electrode mounting groove, and the positive electrode column 200 is electrically connected to the top cover sheet 100. When processing the positive electrode column 200, it can be directly manufactured by a piercing method, which saves material costs and improves production efficiency. In addition, the traditional upper plastic part 303 is eliminated, which reduces material costs, simplifies assembly steps, and improves production efficiency.

[0029] In some embodiments, the outer periphery of the positive electrode boss 201 abuts against the outer periphery of the positive electrode mounting groove to form a positive electrode outer periphery bonding surface 204, and the positive electrode outer periphery bonding surface 204 is fixedly connected. In this way, the assembly between the positive electrode boss 201 and the positive electrode mounting groove is facilitated, and the connection between the positive electrode boss 201 and the top cover sheet 100 is stable, forming a more stable overall structure.

[0030] Preferably, the positive electrode outer peripheral bonding surface 204 is welded and fixedly connected. Of course, other fixing methods can also be used as long as the positive electrode boss 201 can be fixed in the positive electrode installation groove.

[0031] In some embodiments, the middle of the positive electrode installation groove is recessed downward to form a positive electrode recessed groove 202, and a positive electrode step 205 is formed at the bottom of the positive electrode installation groove. The positive electrode step 205 is formed at the periphery of the positive electrode recessed groove 202, and the positive electrode boss 201 abuts against the positive electrode step 205. The bottom of the positive electrode column 200 is recessed upward to form a column groove 206, and the column groove 206 is arranged corresponding to the positive electrode recessed groove 202.

[0032] The positive electrode boss 201 abuts against the positive electrode step 205 , so as to facilitate the abutment and cooperation between the positive electrode column 200 and the top cover sheet 100 after the positive electrode column 200 is embedded in the positive electrode mounting groove.

[0033] There is an installation gap between the positive electrode recessed groove 202 and the positive electrode column 200. During processing and forming, the positive electrode installation groove and the positive electrode recessed groove 202 can be directly pressed and formed by pressing. By arranging the positive electrode recessed groove 202, the abutment fit between the positive electrode step 205 and the positive electrode boss 201 can be more prominent.

[0034] By arranging the column groove 206 , the pressing and forming of the positive electrode boss 201 can be more convenient.

[0035] The bottom of the top cover sheet 100 protrudes downward to form a protruding portion 203 connected to the battery cell, and the protruding portion 203 and the concave groove are arranged opposite to each other up and down. Since the positive electrode column 200 and the top cover sheet 100 are directly combined into one body, the protruding portion 203 can be regarded as a part of the positive electrode column 200, and the connecting piece of the battery cell can be directly fixedly connected to the protruding portion 203. After power is turned on, the entire battery shell acts as a positive electrode, which plays a role in raising the potential.

[0036] In some embodiments, the battery top cover structure also includes a negative electrode assembly 300 inserted into the top cover sheet 100, the negative electrode assembly 300 includes a negative electrode plate 301 and a negative electrode column 302, and an upper plastic part 303 is provided between the negative electrode plate 301 and the top cover sheet 100 to insulate the negative electrode plate 301 from the top cover sheet 100.

[0037] A lower plastic part 306 and a sealing ring 308 are provided between the negative electrode column 302 and the top cover sheet 100 to insulate the negative electrode column 302 from the top cover sheet 100 . The negative electrode column 302 is fixedly connected to the negative electrode plate 301 through a flange structure.

[0038] The negative plate 301 and the negative column 302 are fixedly connected by a flange structure, clamping the top cover sheet 100 toward each other, and clamping the upper plastic part 303 and the lower plastic part 306 at the same time. By arranging the flange structure, the flange structure can be formed by pier pressing, etc., which greatly saves material costs.

[0039] In some embodiments, the flange structure includes a negative electrode mounting groove formed in the negative electrode plate 301 and a negative electrode flange 304 formed on the outer periphery of the negative electrode column 302, the negative electrode mounting groove has a negative electrode step 305 arranged in a ring shape, the negative electrode column 302 is passed through the negative electrode plate 301 and embedded in the negative electrode mounting groove, and the negative electrode flange 304 abuts against the negative electrode step 305.

[0040] The negative electrode column 302 can be formed by a piercing method. During the assembly process, after the negative electrode column 302 is assembled from bottom to top, the negative electrode column 302 is embedded in the negative electrode mounting groove, and a negative electrode flange 304 is formed by riveting and flanging, and pressed against the negative electrode step 305, and the negative electrode column 302 is fixedly connected to the negative electrode plate 301 to ensure integrity and strength.

[0041] In some embodiments, an upper groove is formed on the negative electrode plate 301, and the upper groove is located above the negative electrode mounting groove. The outer periphery of the negative electrode plate 301 abuts against the outer periphery of the negative electrode mounting groove to form a negative electrode outer peripheral bonding surface, which is welded and fixed, and the negative electrode outer peripheral bonding surface is exposed in the upper groove.

[0042] By forming the upper groove, sufficient space can be opened to facilitate welding and fixing the outer peripheral bonding surface of the negative electrode.

[0043] An annular lower step 307 is formed at the lower portion of the negative electrode plate 301, and the upper plastic part 303 is relatively fixed with the lower step 307. In this way, the upper plastic part 303 is integrated with the negative electrode plate 301 and the negative electrode column 302 through cooperation with the lower step 307, which can limit the rotation of the negative electrode plate 301.

[0044] In some embodiments, a lower plastic part 306 is provided at the bottom of the top cover piece 100, and a protruding boss 101 is provided at the bottom of the top cover piece 100. The boss 101 passes through the lower plastic part 306, and a column step 102 is formed on the periphery of the boss 101. The column step 102 is against the side of the lower plastic part 306 away from the top cover piece 100.

[0045] After the protruding column 101 passes through the lower plastic part, the protruding column 101 is pressed or riveted to form a column step 102, so that the lower plastic part 306 and the top cover sheet 100 are combined into a stable whole.

[0046] This embodiment also provides a battery, which includes the above-mentioned battery top cover structure. The battery top cover structure saves material costs, improves production efficiency, and thus reduces the cost of the battery.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The battery top cover structure is characterized by: The invention comprises a top cover sheet (100) and a positive electrode column (200), wherein the top of the top cover sheet (100) is concave downwards to form a positive electrode installation groove; a positive electrode boss (201) is formed on the outer periphery of the positive electrode column (200), the positive electrode boss (201) is embedded in the positive electrode installation groove, and the positive electrode column (200) is electrically connected to the top cover sheet (100).

2. The battery top cover structure according to claim 1, characterized in that: The outer periphery of the positive electrode boss (201) abuts against the outer periphery of the positive electrode installation groove to form a positive electrode outer periphery bonding surface (204), and the positive electrode outer periphery bonding surface (204) is welded and fixedly connected.

3. The battery top cover structure according to claim 1, characterized in that: The middle of the positive electrode installation groove is recessed downward to form a positive electrode recessed groove (202); a positive electrode step (205) is formed at the bottom of the positive electrode installation groove; the positive electrode step (205) is formed on the outer periphery of the positive electrode recessed groove (202); the positive electrode boss (201) abuts against the positive electrode step (205); the bottom of the positive electrode column (200) is recessed upward to form a column groove (206); the column groove (206) is arranged corresponding to the positive electrode recessed groove (202).

4. The battery top cover structure according to claim 3, characterized in that: The bottom of the top cover sheet (100) protrudes downwards to form a protruding portion (203) connected to the battery cell, and the protruding portion (203) and the concave groove are arranged in an upper and lower manner.

5. The battery top cover structure according to claim 1, characterized in that: The battery top cover structure also includes a negative electrode assembly (300) inserted into the top cover sheet (100), the negative electrode assembly (300) including a negative electrode plate (301) and a negative electrode column (302), an upper plastic part (303) being provided between the negative electrode plate (301) and the top cover sheet (100) to insulate the negative electrode plate (301) from the top cover sheet (100); a lower plastic part (306) and a sealing ring (308) being provided between the negative electrode column (302) and the top cover sheet (100) to insulate the negative electrode column (302) from the top cover sheet (100), and the negative electrode column (302) and the negative electrode plate (301) being fixedly connected via a flange structure.

6. The battery top cover structure according to claim 5, characterized in that: The flange structure comprises a negative electrode mounting groove formed in the negative electrode plate (301) and a negative electrode flange (304) formed on the periphery of the negative electrode column (302); the negative electrode mounting groove has a negative electrode step (305) arranged in an annular shape; the negative electrode column (302) is inserted into the negative electrode plate (301) and embedded in the negative electrode mounting groove; the negative electrode flange (304) abuts against the negative electrode step (305).

7. The battery top cover structure according to claim 6, characterized in that: An upper groove is formed on the negative electrode plate (301), the upper groove is located above the negative electrode installation groove, the outer periphery of the negative electrode plate (301) abuts against the outer periphery of the negative electrode installation groove to form a negative electrode outer periphery bonding surface, the negative electrode outer periphery bonding surface is welded and fixed, and the negative electrode outer periphery bonding surface is exposed in the upper groove.

8. The battery top cover structure according to claim 6, characterized in that: An annular lower step (307) is formed at the lower portion of the negative electrode plate (301), and the upper plastic part (303) and the lower step (307) are relatively fixed in cooperation.

9. The battery top cover structure according to any one of claims 1 to 8, characterized in that: A lower plastic part (306) is provided at the bottom of the top cover sheet (100), and a protruding convex column (101) is provided at the bottom of the top cover sheet (100), the convex column (101) passes through the lower plastic part (306), and a column step (102) is formed on the periphery of the convex column (101), and the column step (102) is supported on a side of the lower plastic part (306) away from the top cover sheet (100).

10. A battery, characterized in that A battery top cover structure comprising any one of claims 1 to 9.

Images