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CN-224204331-U - Battery top cover

CN224204331UCN 224204331 UCN224204331 UCN 224204331UCN-224204331-U

Abstract

The utility model belongs to the technical field of battery top covers, and mainly relates to a battery top cover, which comprises a cover plate and a sealing assembly, wherein the cover plate is provided with a step part for assembling the sealing assembly and a liquid injection hole for assembling a glue nail along the thickness direction of the cover plate, the sealing assembly comprises a first sealing nail and a second sealing nail, the step part comprises a first step and a second step fixedly connected with the first step, the first step is surrounded by a first cavity for assembling the first sealing nail, the second step is surrounded by a second cavity for assembling the second sealing nail, the first step is fixedly connected with the liquid injection hole, the first sealing nail is provided with a first body part and a first extension part which is arranged in the thickness direction of the first body part, and the first extension part is welded with the first step.

Inventors

  • Du Jiebin
  • WANG JINBING
  • MEI XIAOBO
  • LIAO TAO
  • ZHANG ZIWEI

Assignees

  • 广州融捷能源科技有限公司

Dates

Publication Date
20260505
Application Date
20250314

Claims (9)

  1. 1. The battery top cover comprises a cover plate (1) and a sealing assembly (2), wherein the cover plate (1) is provided with a step part (11) for assembling the sealing assembly (2) and a liquid injection hole (12) for assembling a glue nail (3) along the thickness direction of the cover plate (1), and the battery top cover is characterized in that the sealing assembly (2) comprises a first sealing nail (21) and a second sealing nail (22); The step part (11) comprises a first step (111) and a second step (112) fixedly connected with one end of the first step (111), wherein a first cavity (113) for assembling the first sealing nail (21) is surrounded by the first step (111), and a second cavity (114) for assembling the second sealing nail (22) is surrounded by the second step (112); The other end of the first step (111) is fixedly connected with the liquid injection hole (12), the first sealing nail (21) is provided with a first body part (211) and a first extension part (212) extending along the thickness direction of the first body part (211), and the first extension part (212) is welded with the first step (111); The first step (111) comprises a first step body (1111) and a first step wall (1112) fixedly connected with the first step body (1111), and the first step wall (1112) is welded with the first extension portion (212).
  2. 2. A battery top cover according to claim 1, wherein the first step (1111) is connected perpendicularly to the first step wall (1112).
  3. 3. The battery top cover according to claim 1, wherein a first weld (2121) is provided between the first step wall (1112) and the first extension (212), the first weld (2121) being used for welding the first step wall (1112) and the first extension (212).
  4. 4. A battery top cover according to claim 1, wherein the first step (1111) is provided with a first recess (1113), the first recess (1113) being adapted to receive the first extension (212).
  5. 5. The battery top cover according to claim 1, wherein the second step (112) is provided with a second step body (1121) and a second step wall (1122), the cover plate is provided with a table top (13), the second step body (1121) is fixedly connected with the first step (111), and the second step wall (1122) is fixedly connected with the table top (13).
  6. 6. The battery top cover according to claim 5, wherein the second step (1121) is connected to the first step (111) vertically, and the second step wall (1122) is connected to the mesa (13) vertically.
  7. 7. The battery top cover according to claim 5, wherein the second sealing nail (22) is provided with a second body portion (221) and a second extension portion (222) extending in a thickness direction of the second body portion (221), and the second extension portion (222) is welded to the second step (112).
  8. 8. The battery top cover of claim 7, wherein a second weld (2221) is disposed between the second step wall (1122) and the second extension (222), the second weld (2221) being used for welding the second step wall (1122) and the second extension (222).
  9. 9. A battery top cover according to claim 1, characterized in that the second sealing spike (22) has a larger diameter than the first sealing spike (21).

Description

Battery top cover Technical Field The utility model belongs to the technical field of battery top covers, and particularly relates to a battery top cover. Background With the wide application of new energy automobiles and portable electronic devices, the performance, safety and reliability of aluminum-shell batteries have become particularly important. In the production of aluminum-shell batteries, the welding quality of the sealing nails is directly related to the safety of the use of the battery and the service life thereof. Therefore, poor sealing nail welding conditions are screened out, and the sealing nail welding conditions are very important to ensure leakage protection and overall performance of the battery. Existing sealing nail welding detection methods, such as helium gas inspection and CCD image sensor screening, can evaluate welding effect to a certain extent, but still have a plurality of technical defects. First, prior to helium verification, there are cases where helium is not successfully injected into the battery or leaks occur during the detection process, resulting in the detection method losing effectiveness. In addition, the CCD image sensor may not accurately identify the tiny pinhole-like gap at the edge of the seal pin when analyzing the welding effect. These defects make it difficult to eliminate bad welding comprehensively in the production process, hidden danger still exists, and the safe production of the battery is seriously hindered. Based on this, there is a need for further improvements in the battery top cover structure that effectively reduce the risk of electrolyte leakage. Disclosure of utility model The utility model aims to provide a battery top cover capable of remarkably improving the sealing performance of the battery top cover aiming at the defects of the prior art. In order to achieve the above object, the present application implements the following technical scheme: The battery top cover comprises a cover plate and a sealing assembly, wherein the cover plate is provided with a step part for assembling the sealing assembly and a liquid injection hole for assembling a glue nail along the thickness direction of the cover plate, and the sealing assembly comprises a first sealing nail and a second sealing nail; The step part comprises a first step and a second step fixedly connected with one end of the first step, wherein the first step is surrounded by a first cavity for assembling the first sealing nail; The other end of the first step is fixedly connected with the liquid injection hole, the first sealing nail is provided with a first body part and a first extension part extending along the thickness direction of the first body part, and the first extension part is welded with the first step. The technical scheme has the following technical effects: Aiming at the technical defects of the prior battery top cover, the application improves the prior battery top cover structure, and a step part for assembling a sealing component and a liquid injection hole for assembling a glue nail are arranged along the thickness direction of a cover plate. The first sealing nail and the second sealing nail are arranged in the sealing assembly, the air tightness can be obviously improved by welding the two nail bodies, and the risk of electrolyte leakage is effectively reduced. Specifically, the design of the step part enables the sealing nail to be tightly connected with the liquid injection hole, so that the sealing effect is enhanced. The structural design of the first sealing nail comprises an integrated body part and an extension part, so that the first sealing nail can be better welded on the step part, and the firmness and the reliability of welding are improved. The optimal design effectively overcomes the hidden trouble existing in the welding of the sealing nails in the traditional method, improves the safety performance of the battery, and fundamentally solves the problem of electrolyte leakage caused by poor welding. As a further improvement of the battery top cover, the first step comprises a first step body and a first step wall fixedly connected with the first step body, and the first step wall is welded with the first extension part. As a further improvement of the battery top cover of the present utility model, the first step body is vertically connected with the first step wall. As a further improvement of the battery top cover of the utility model, a first welding seam is arranged between the first step wall and the first extension part, and the first welding seam is used for welding the first step wall and the first extension part. As a further improvement of the battery top cover of the present utility model, the first step body is provided with a first groove for receiving the first extension portion. As a further improvement of the battery top cover, the second step is provided with a second step body and a second step wall, the cover plate is provided with a