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CN-224204216-U - Top cap subassembly, battery cell and consumer

CN224204216UCN 224204216 UCN224204216 UCN 224204216UCN-224204216-U

Abstract

The utility model belongs to the technical field of batteries, and discloses a top cover assembly, a single battery and electric equipment. The top cover assembly comprises a top cover body, a battery pole, a lower insulating piece and an insulating piece, wherein a pole mounting hole is formed in the top cover body, the battery pole comprises a mounting part and a connecting part which are integrally formed from top to bottom, the mounting part is inserted into the pole mounting hole, a lower sealing piece is clamped between the connecting part and the bottom wall of the top cover body, the lower insulating piece is abutted to the bottom wall of the top cover body, at least part of the lower insulating piece is clamped between the connecting part and the bottom wall of the top cover body, the lower sealing piece is mounted in a clamping hole of the lower insulating piece, and the insulating piece is clamped between the connecting part and the lower sealing piece and correspondingly covers the connecting part of the lower sealing piece and the lower insulating piece. The top cover assembly can improve the high temperature resistance of the top cover assembly with low cost, and the insulation performance of the top cover assembly is improved, so that the use safety and reliability of the top cover assembly are improved.

Inventors

  • LI JIANJU
  • LI CHANGXIE

Assignees

  • 深圳市科达利实业股份有限公司

Dates

Publication Date
20260505
Application Date
20250331

Claims (10)

  1. 1. Top cap subassembly, its characterized in that includes: The top cover comprises a top cover body (100), wherein a pole mounting hole (110) is formed in the top cover body (100); The battery pole (200), the battery pole (200) comprises an installation part (210) and a connecting part (220) which are integrally formed from top to bottom, the installation part (210) is inserted into the pole installation hole (110), and a lower sealing element (240) is clamped between the connecting part (220) and the bottom wall of the top cover body (100); The lower insulating piece (300) is abutted against the bottom wall of the top cover body (100), at least part of the lower insulating piece (300) is clamped between the connecting part (220) and the bottom wall of the top cover body (100), and the lower sealing piece (240) is arranged in the clamping hole (310) of the lower insulating piece (300); And the insulating sheet (400) is clamped between the connecting part (220) and the lower sealing piece (240), and correspondingly covers the connecting part of the lower sealing piece (240) and the lower insulating piece (300).
  2. 2. The top cap assembly according to claim 1, wherein a receiving groove (221) is formed at a junction of the bottom wall of the lower sealing member (240) and the bottom wall of the lower insulating member (300), and/or a receiving groove (221) is formed at a top wall of the connecting portion (220), and the insulating sheet (400) is filled in the receiving groove (221).
  3. 3. The top cap assembly according to claim 2, wherein the insulation sheet (400) includes an adsorption frame and aerogel, the receiving groove (221) is provided in a top wall of the connection portion (220), the adsorption frame is provided in the receiving groove (221), and the aerogel fills a gap between the receiving groove (221) and the adsorption frame.
  4. 4. The cap assembly of claim 3, wherein the suction frame comprises any one of a fibrous sliver, a porous ceramic profile, a foam plastic, and a porous glass.
  5. 5. The header assembly of claim 4, wherein the insulating sheet (400) has a high temperature resistance not less than that of the lower seal (240), and the insulating sheet (400) has a thermal insulation not less than that of the lower seal (240).
  6. 6. A header assembly according to claim 3, wherein the top wall of the insulating sheet (400) is in interference connection with the junction of the bottom wall of the lower seal (240) and the bottom wall of the lower insulator (300).
  7. 7. The header assembly of claim 1, wherein the top of the mounting portion (210) further includes a crimp portion (230), the crimp portion (230) sandwiching an upper insulator (600) with the top wall of the header body (100).
  8. 8. The top cap assembly of claim 7, wherein the upper insulator (600) further comprises an insulator (610) sandwiched between the mounting portion (210) and the post mounting hole (110).
  9. 9. A unit cell comprising the cap assembly according to any one of claims 1 to 8.
  10. 10. A powered device comprising the battery cell of claim 9.

Description

Top cap subassembly, battery cell and consumer Technical Field The utility model relates to the technical field of batteries, in particular to a top cover assembly, a single battery and electric equipment. Background The battery shell is an essential component of the cylindrical battery and is used for accommodating a core pack assembly and a pole column assembly of the battery, the pole column assembly is used for being connected with an electronic element, a sensor or a connector to realize the external discharging function of the cylindrical battery, and meanwhile, the pole column assembly and the battery shell are in insulating connection through a lower plastic part, so that unsafe phenomena such as short circuit and the like of the cylindrical battery are avoided. Because the cylindrical battery is developing towards the directions of high energy density and high charge and discharge power, the short-time current intensity of the pole assembly is high, and the use frequency is high, so that the heating value of the pole assembly is higher, and the battery cover plate, the pole assembly and the lower plastic part have certain high-temperature resistance and ageing resistance while ensuring good insulativity between the pole assembly and the battery shell. The existing lower plastic part can only ensure stable insulating performance below 300 ℃, the insulating performance of the lower plastic part can be greatly reduced when the temperature is higher than 300 ℃, even the lower plastic part can be melted when the temperature is higher than a certain temperature, poor insulation and even short circuit occur, meanwhile, gaps exist between the lower plastic part and the insulating part of the pole assembly, high-voltage overcurrent can be generated in the gaps when high-power charge and discharge are carried out, and the potential risk of short circuit exists in the cylindrical battery. Therefore, it is needed to provide a novel top cover assembly, a single battery and electric equipment, so as to solve the above technical problems in the prior art. Disclosure of utility model The utility model aims to provide a top cover assembly, which can improve the high temperature resistance of the top cover assembly with low cost, improve the insulation performance and improve the use safety and reliability of the top cover assembly. To achieve the purpose, the utility model adopts the following technical scheme: The top cover assembly comprises a top cover body, a battery pole, a lower insulating piece and an insulating piece, wherein a pole mounting hole is formed in the top cover body, the battery pole comprises a mounting part and a connecting part which are integrally formed from top to bottom, the mounting part is inserted into the pole mounting hole, a lower sealing piece is clamped between the connecting part and the bottom wall of the top cover body, the lower insulating piece is abutted to the bottom wall of the top cover body, at least part of the lower insulating piece is clamped between the connecting part and the bottom wall of the top cover body, the lower sealing piece is mounted in the clamping hole of the lower insulating piece, and the insulating piece is clamped between the connecting part and the lower sealing piece and correspondingly covers the connecting part of the lower sealing piece and the lower insulating piece. Optionally, a receiving groove is formed at a connection part between the bottom wall of the lower sealing member and the bottom wall of the lower insulating member, and/or a receiving groove is formed at a top wall of the connection part, and the insulating sheet is filled in the receiving groove. Optionally, the insulating sheet includes an adsorption frame and aerogel, the top wall of the connecting portion is provided with the accommodating groove, the accommodating groove is internally provided with the adsorption frame, and the aerogel is filled in a gap between the accommodating groove and the adsorption frame. Optionally, the adsorption frame includes any one of a fibrous sliver, a porous ceramic section, a foam plastic and porous glass. Optionally, the high temperature resistance of the insulating sheet is not less than the high temperature resistance of the lower sealing member, and the heat insulation performance of the insulating sheet is not less than the heat insulation performance of the lower sealing member. Optionally, the top wall of the insulating sheet is in interference connection with the connection part of the bottom wall of the lower sealing piece and the bottom wall of the lower insulating piece Optionally, the top of the mounting portion further includes a pressing portion, and an upper insulating member is sandwiched between the pressing portion and a top wall of the top cover body. Optionally, the upper insulating member further includes an insulating portion interposed between the mounting portion and the pole mounting hole. Another object of the prese