Patent Application
20250167356
The present application relates to the technical field of batteries, for example, to a top cover assembly and a battery.
The top covers of the power batteries are mainly used in new energy vehicles. In related art, the top cover of the battery is mainly manufactured by an injection molding process and a riveting process. The injection molding process is limited by the site of the injection molding equipment and by the material molding process, resulting in a lower production efficiency of the top cover and the inability to meet the growing battery cell market. Riveting process procedures are relatively numerous, complicated in structure, and cumbersome in production steps, which also results in a lower production efficiency of the top cover and cannot meet the growing battery cell market.
The present application provides a top cover assembly and a battery, which may reduce production costs, improve assembly efficiency and use safety.
In a first aspect, an embodiment of the present application provides a top cover assembly including:
In one embodiment, a width of an opening of the welding recess is greater than a width of a bottom of the welding recess.
In one embodiment, the top cover assembly further includes:
In one embodiment, the top cover assembly further includes:
In one embodiment, the lower end of the top cover sheet includes a first mounting slot, and a side of the lower insulating plate which is adjacent to the top cover sheet includes a protrusion, and the protrusion is snapped in the first mounting slot.
In one embodiment, a side of the lower insulating plate which is away from the top cover sheet includes a second mounting slot, the second mounting slot is provided in correspondence with the protrusion, and the body is snapped in the second mounting slot.
In one embodiment, the top cover assembly further includes:
In one embodiment, the bottom of the fixing recess includes a positioning post, a lower end of the connecting block includes a positioning recess, and the positioning post is snapped in the positioning recess.
In one embodiment, the a lower end of the pole is provided with a weight-reducing recess.
In a second aspect, embodiments of the present application provide a battery including the top cover assembly mentioned above.
Beneficial effects of the present application are as follows.
Embodiments of the present application provide a top cover assembly including a top cover sheet, a pole and a connecting block. When the top cover assembly is assembled, the boss of each pole passes through the respective mounting hole. Then, each connecting block is sleeved at the upper end of the respective boss and welded at the respective welding recess formed by the first notch and the second notch, so that the connecting block and the pole are fixed. The assembling operation of the top cover assembly is simple and quick, the connecting block and the pole are easily fixed, and the number of parts used is small, thereby improving the assembling efficiency and reducing the production cost. At the same time, each connecting block of the top cover assembly has the function of fixing and preventing rotation of the respective pole, thereby improving the structural strength and the use safety of the top cover assembly.
In the figure:
1. top cover sheet; 2. pole; 21. body; 22. boss; 3. connecting block; 4. sealing ring; 41. first sealing portion; 42. second sealing portion; 5. lower insulating plate; 51. protrusion; 6. upper insulating plate; 61. positioning post;
10. mounting hole; 20. welding recess; 201. first notch; 202. second notch; 30. connecting hole; 40. through hole; 50. first mounting slot; 60. second mounting slot; 70. third mounting slot; 80. fixing recess; 90. limiting hole; 100. positioning recess; and 200. weight-reducing recess.
In the description of the present application, unless otherwise expressly specified and limited, the terms “conjoint”, “connect”, and “fix” are to be understood in a broad sense, for example, as a fixed connection, as a detachable connection, or as a one-piece connection; also as a mechanical connection or an electrical connection; or may be directly connected or indirectly connected by means of an intermediate medium; or may be internal communication of the two elements or interaction of the two elements. The specific meaning of the above terms in the present application may be understood by one of ordinary skill in the art as the case may be.
For the purposes of this application, unless otherwise expressly specified and limited, that the first feature is “over” or “under” the second feature may include the first feature is in direct contact with the second feature, or may include the first feature is not in direct contact with the second feature, but by means of a separate feature therebetween. Furthermore, that the first feature is “on”, “above” and “over” the second feature includes the first feature is directly above and diagonally above the second feature, or simply indicating that the first feature is horizontally higher than the second feature. That the first feature is “below”, “under”, and “beneath” the second feature includes the first feature is directly below and diagonally below the second feature, or simply indicating that the first feature is horizontally smaller than the second feature.
In the description of this embodiment, the terms “upper”, “lower”, “right”, and other orientation or positional relationships are based on the orientation or positional relationship shown in the accompanying drawings, and are only for convenience of description and simplified operation. It is not intended to indicate or imply that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application. In addition, the terms “first” and “second” are only used for descriptive purposes and have no special meaning.
As shown in
In one embodiment, as shown in
In one embodiment, the poles 2 are made of a composite sheet stamping process, which is low in manufacturing process requirements and is low in costs, and is not susceptible to the thermal stress and cracking, and thus has the higher structural strength and the higher safety. In other embodiments, a lower end of the pole 2 is provided with a weight-reducing recess 200 to reduce the weight of the pole 2, thereby reducing the weight of the top cover assembly.
In one embodiment, the boss 22 is an aluminum block, and the connecting block 3 is also an aluminum block, so as to facilitate welding and fixing. The structure strength and the electrical performance are preferable after the welding and the fixing are performed. In other embodiments, the materials of the boss 22 and the connecting block 3 may be provided according to actual requirements.
In the present embodiment, after the connecting block 3 is sleeved on the boss 22, a jig is used to apply a pressing force to the top cover assembly, so that a plurality of parts are closely adhered to each other. And, the connecting block 3 and the pole 2 are connected and fixed by a laser welding process, thereby completing the assembling operation of the top cover assembly. Furthermore, the melted metal after welding fills the welding recesses 20, and a surface of each connecting block 3 is flush with a surface of the respective boss 22.
In one embodiment, a width of an opening of the welding recess 20 is greater than a width of a bottom of the welding recess 20, so that the molten metal after welding is facilitated to flow into the welding recess 20, thereby avoiding the occurrence of the empty welding within the welding recess 20. In one embodiment, the width of the opening of the welding recess 20 is in the range of 0 mm-2 mm and a depth of the welding recess 20 is in the range of 0 mm-1 mm.
In one embodiment, the welding recess 20 has a V-shaped structure, a U-shaped structure, a “” shaped structure, or a “
” shaped structure.
In one embodiment, the pole 2 is insulatively connected to the top cover sheet 1 by a sealing ring 4. In one embodiment, as shown in
In one embodiment, the sealing ring is made of an acid-alkali-resistant and high-temperature-resistant elastomeric material, which has a longer service life and a better leak tightness.
In the present embodiment, as shown in
In one embodiment, as shown in
In one embodiment, as shown in
In one embodiment, as shown in
In one embodiment, the third mounting slot 70 is square and has a good limiting effect on the upper insulating plate 6, so that rotation of the upper insulating plate 6 is prevented and the processing is facilitated. The fixing recess 80 is square in shape, so that the fixing recess 80 is easy to be machined. At the same time, the fixing recess 80 has a good limiting effect on the connecting block 3, thereby avoiding the rotation of the connecting block 3, improving the torsional strength of the connecting block 3 and the pole 2, and thus improving the use safety of the top cover assembly. In other embodiments, the shapes of both the third mounting slot 70 and the fixing recess 80 may be provided according to actual requirements.
In one embodiment, the connecting hole 30 is adapted to the outer circumferential shape of the boss 22, and the connecting hole 30 is oval in shape, so that relative rotation of the boss 22 and the connecting hole 30 after insertion may be prevented, thereby improving the connection stability and the torsional strength of both the pole 2 and the connecting block 3. In other embodiments, the connecting hole 30 may also be of other shapes, such as square, diamond, and the like, as desired.
In one embodiment, a bottom of the fixing recess 80 is provided with positioning posts 61. The lower end of the connecting block 3 is provided with a positioning recesses 100, and the positioning posts 61 is snapped in the positioning recesses 100. By snap-engaging the positioning posts 61 with the positioning recesses 100, the torsional strength of the poles 2 and the connecting blocks 3 may be further improved, thereby improving the structural strength and the stability of the top cover assembly. Illustratively, the bottom of the fixing recess 80 is provided with two positioning posts 61 located on the diagonal of the fixing recess 80, so that the connecting block 3 is positioned and placed in the fixing recess 80, and thus the connecting block 3 is evenly stressed.
The present embodiment also provides a battery including the above-described top cover assembly. By using the above-described top cover assembly, the battery has low production cost, high production efficiency, and high safety in use.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202211145248.8 | Sep 2022 | CN | national |
This application is a Continuation of PCT Patent Application No. PCT/CN2023/080779 having International filing date of Mar. 10, 2023, which claims the benefit of priority of Chinese Patent Application No. 202211145248.8, filed on Sep. 20, 2022. The contents of the above applications are all incorporated by reference as if fully set forth herein in their entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2023/080779 | Mar 2023 | WO |
| Child | 19023877 | US |
