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Top cover assembly for secondary battery and secondary battery

A technology for secondary batteries and electrode assemblies, which is applied to battery pack components, battery caps/end caps, electrical components, etc., can solve the problem of increasing the structural complexity of the top cover assembly, the low utilization rate of the internal space of the battery case, and increasing the top cover. The overall height of the cover assembly can achieve the effect of simple structure, easy production and assembly, and improved energy density and sealing performance.

Active Publication Date: 2020-09-15
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
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Problems solved by technology

[0003] Since a part of the pole is located inside the shell (usually 1.5-4 mm), and the sealing ring is also located inside the shell, the space utilization rate inside the battery shell will be low, resulting in low energy density of the battery, and because each pole Both columns need to be machined, making the manufacturing process complicated and expensive to manufacture
Moreover, in order to insulate the top cover plate from the electrode terminals provided thereon, it is usually necessary to arrange corresponding insulating parts between the pole and the top cover plate, thus increasing the structural complexity of the top cover assembly and increasing the The overall height of the top cover assembly results in low battery energy density

Method used

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  • Top cover assembly for secondary battery and secondary battery
  • Top cover assembly for secondary battery and secondary battery
  • Top cover assembly for secondary battery and secondary battery

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Embodiment Construction

[0044]Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may have been exaggerated. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the features, str...

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Abstract

The invention provides a top cover assembly of a secondary battery and the secondary battery. The top cover assembly of the secondary battery includes: a top cover plate, which is made of insulating plastic and has an electrode lead-out hole; a first electrode terminal, the first electrode terminal includes a terminal plate, and the terminal plate is located on one side of the top cover plate and Covering the electrode lead-out hole, and the outer peripheral surface of the terminal plate protrudes from the inner wall surface of the electrode lead-out hole; the connecting piece is respectively connected with the top cover plate and the first electrode terminal, and the first electrode terminal is fixed on the top cover plate through the connecting piece and a seal, the seal is disposed between the top cover plate and the terminal plate around the electrode lead-out hole to seal the electrode lead-out hole. While ensuring the sealing effect of the secondary battery casing, it can reduce the occupation of the internal space of the battery casing, thereby improving the energy density of the secondary battery and ensuring the reliability of the secondary battery.

Description

technical field [0001] The invention relates to the technical field of energy storage devices, in particular to a top cover assembly of a secondary battery and the secondary battery. Background technique [0002] At present, the power battery generally adopts a square hard shell structure. The power battery shell includes a shell and a top cover assembly. The power battery shell provides a closed space to accommodate the electrode assembly and electrolyte. The electric energy of the electrode assembly passes through the pole of the top cover assembly. Lead out from the confined space to the outside of the confined space. In the existing top cover assembly, the top cover plate is a metal plate and has a through hole, and the pole is divided into a base part and an extension part, and the cross-sectional area of ​​the base part is larger than the diameter of the through hole. When assembling, the base part is located under the top cover plate (that is, inside the housing), an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/04H01M2/06H01M2/08H01M50/147H01M50/172H01M50/184H01M50/188
CPCH01M50/15H01M50/147H01M50/183H01M50/172Y02E60/10
Inventor 李全坤王鹏郭志君朱涛声
Owner CONTEMPORARY AMPEREX TECH CO
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