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Secondary battery top cover assembly and secondary battery

A secondary battery and top cover technology, which is applied to battery pack parts, small-sized batteries/battery packs, battery covers/end covers, etc. The charging problem cannot be solved, etc.

Active Publication Date: 2019-01-29
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the connection strength between the fuse member and the negative electrode conductor is low, the contact resistance between the two will be large, which will cause the fuse member to be blown when the short circuit current is overcharged under normal temperature conditions. After the fuse member is blown, it will cause The overcharge problem of the power battery under normal temperature cannot be solved, which reduces the safety of the secondary battery

Method used

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  • Secondary battery top cover assembly and secondary battery
  • Secondary battery top cover assembly and secondary battery
  • Secondary battery top cover assembly and secondary battery

Examples

Experimental program
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Embodiment Construction

[0072] The present application will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0073] like figure 1 As shown, the present application provides a secondary battery top cover assembly 1 , including a first pole 11 , a conductive member 12 , a second pole 13 and a top cover sheet 14 . Among them, the first pole 11 and the second pole 13 are used to electrically connect to the electrode assembly 2, and are installed to protrude from the top cover sheet 14, so that the electrode assembly 2 can be electrically connected to the external parts of the casing 3, so that Electric energy inside the electrode assembly 2 is output. The application does not limit the polarity of the first pole 11 and the second pole 13 , when the first pole 11 is a positive pole, the second pole 13 is a negative pole, and vice versa.

[0074] like figure 2 As shown, the first pole 11 and the second pole 13 respectively include a ...

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PUM

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Abstract

The invention relates to a secondary battery top cover assembly and a secondary battery. The secondary battery top cover assembly comprises a first pole, a conductive piece, a second pole and a top cover sheet; the top cover sheet is insulated from the first pole and electrically connected with the second pole; the secondary battery comprises a contact sheet, the contact sheet is attached to the top cover sheet, the conductive piece is is insulated from the top cover sheet and comprises a pole connecting part, a first fuse component and a contact sheet connecting part, and the first fuse component has a fusion point lower than those of the pole connecting part and the contact sheet connecting part; the conductive piece also comprises a connecting layer, and the first fuse component is connected with the pole connecting part through the connecting layer and / or connected with the contact sheet connecting part through the connecting layer. By means of the scheme, the safety of the secondary battery is improved.

Description

technical field [0001] The present application relates to the technical field of energy storage devices, in particular to a secondary battery top cover assembly and a secondary battery. Background technique [0002] Because power batteries (such as lithium-ion batteries) have the advantages of high energy density, high power density, many cycle times, and long storage time, they are widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers. Electric vehicles, electric bicycles and other electric vehicles and large and medium-sized electric equipment such as energy storage facilities have broad application prospects, and become the key to solving global problems such as energy crisis and environmental pollution. [0003] When the power battery is overcharged, the decomposition of the electrolyte in the power battery will increase the internal pressure of the power battery and cause the battery to catch fire and explode. In order ...

Claims

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Application Information

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IPC IPC(8): H01M2/04H01M2/20H01M2/34H01M50/147H01M50/15H01M50/176H01M50/50H01M50/536H01M50/55H01M50/553H01M50/583H01M50/593
CPCH01M50/147H01M50/50H01M50/581H01M50/553H01M50/55H01M50/593H01M2200/103H01M2200/20Y02E60/10H01M50/15H01M50/578
Inventor 陈柏松王鹏吴凯王志宇陈小波朱涛声
Owner CONTEMPORARY AMPEREX TECH CO
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