Top cover assembly of secondary battery and secondary battery

A secondary battery and top cover technology, which is applied in secondary battery manufacturing, battery pack components, electrical components, etc., can solve the problems of increasing thermal runaway, avoiding the increase of internal resistance, solving the problem of overcharging, and improving the response The effect of high temperature environment capability

Active Publication Date: 2019-05-28
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In other words, the existing external short-circuit components can only solve the overcharge problem of the secondary battery under normal temperature conditions, but will increase the probability of thermal runaway in high-temperature environments

Method used

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  • Top cover assembly of secondary battery and secondary battery
  • Top cover assembly of secondary battery and secondary battery
  • Top cover assembly of secondary battery and secondary battery

Examples

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Embodiment Construction

[0043]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 having an air hole; a first electrode terminal insulated from the top cover plate; a second electrode terminal electrically connected with the top cover plate; a conductive part electrically connected with the first electrode terminal and insulated from the top cover plate; an overturning sheet attached to the top cover plate and configured to flip in response to an increase in an internal pressure of the secondary battery so as to electrically connect the overturning sheet to the conductive part; and a sealing plug sealing the air hole and having a lower melting point than that of the top cover plate, and configured to deform in response to an increase in an ambient temperature where the secondary battery is located to disengage a sealed state with the air hole. The overcharge problem of the secondary battery under thenormal temperature condition can be solved, meanwhile, gas generated inside the secondary battery can be discharged in time in the high-temperature environment, and accidents such as electrode assembly explosion caused by short circuit of a positive plate and a negative plate of the secondary battery in the high-temperature environment are avoided.

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] New energy vehicles are being widely promoted at home and around the world, but there are still many things to improve in order to completely replace fuel vehicles. For example, the mileage of the car is small, the cost of the battery pack is high, and the reliability of the battery pack needs to be further resolved. Based on the above problems, higher requirements are put forward for the secondary battery, which is the core part of electric vehicles, such as the need for the secondary battery to achieve higher energy density and lower cost. [0003] A secondary battery is different from a primary battery in that it can be repeatedly charged and discharged, whereas the latter is not designed to be rechargeable. However, when the secondary battery is overcharged, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M2/12H01M2/34H01M10/04H01M50/147H01M50/325H01M50/578
CPCY02E60/10Y02P70/50
Inventor 陈柏松王志宇王鹏李全坤朱涛声
Owner CONTEMPORARY AMPEREX TECH CO
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