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Secondary battery and battery module

A secondary battery and electrode assembly technology, which is applied in the field of secondary batteries and battery modules, can solve problems such as battery explosion and poor air flow, and achieve the effects of preventing explosion, improving safety, and solving battery overcharge problems

Active Publication Date: 2017-01-11
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, an explosion-proof valve is usually connected to the top cover, and the part of the current cut-off structure located outside the top cover will affect the air flow of the explosion-proof valve. When the secondary battery generates internal gas due to an accidental internal short circuit, the air flow is not smooth. May cause the battery to explode, resulting in a serious accident

Method used

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Examples

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no. 1 example

[0115] In the first embodiment, the flipping piece 70 is connected to the top cover piece 10, and the first terminal 20 is electrically connected to the top cover piece 10, specifically, as Figure 1-3 , 4, and 7, the top cover sheet 10 is provided with a first through hole, and the flip sheet 70 is attached to the top cover sheet 10 and seals the first through hole, so that the top cover sheet 10, the flip sheet 70 and the housing form a seal cavity. The first terminal 20 is electrically connected to the top cover sheet 10 , preferably the top cover sheet 10 may be provided with a fourth groove, and the first terminal 20 is inserted into the fourth groove; the second terminal 30 is electrically insulated from the top cover sheet 10 . The connecting piece 40 is electrically insulated from the top cover sheet 10 , and at least a part of the connecting piece 40 (the contact portion 401 when the contact portion 401 is provided) is opposite to the first through hole. In the norma...

no. 2 example

[0116] In the second embodiment, the turning piece 70 is attached to the first terminal 20, such as Figure 3a , 4a As shown, a first through hole is provided on the first terminal 20, and the flipping piece 70 seals the first through hole. At this time, when the connecting piece 40 is located on the side of the top cover sheet 10 away from the first pole piece, the top cover sheet 10 is provided with a second through hole, and the second through hole is opposite to the first through hole. In the normal state, the first pole piece is electrically connected to the first terminal 20 through the reversing piece 70; In the connected state, the flipped flip 70 is electrically connected to the connector 40 , so that the first terminal 20 is electrically connected to the second terminal 30 through the flip 70 , the connector 40 . When the secondary battery expands or compresses and when the top cover sheet 10 is welded to the housing, the resulting force will be applied to the top ...

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Abstract

The application relates to the technical field of production of power storage devices, in particular to a secondary battery and a battery module. At least one of a first terminal and a second terminal and a top cover plate are arranged in an electric insulation mode; a connecting piece is electrically connected with the second terminal; an explosion-proof valve is arranged on the top cover plate; and the connecting piece is positioned beyond a projection range of the explosion-proof valve along the height direction, and is also positioned in a projection range of the top cover plate along the height direction. In a normal state, a first pole piece is electrically connected with the first terminal through a turnover piece, and a second pole piece is electrically connected with the second terminal; and when the pressure in the secondary battery exceeds a reference pressure, the turnover piece can turn over to break the electric connection with the first pole piece, and is electrically connected with a contact part after turnover, so that the first terminal is electrically connected with the second terminal. By use of the secondary battery and the battery module provided by the application, even when an automobile is in a running state, the automobile cannot flame out suddenly, so that the safety of the automobile is improved.

Description

technical field [0001] The present application relates to the technical field of production of energy storage devices, in particular to a secondary battery and a battery module. Background technique [0002] For EV hard-shell batteries, in order to solve the overcharge problem, the industry generally adopts a solution to cut off the main circuit of the battery before the battery fails to prevent the battery from continuing to charge to ensure battery safety. The usual structure is: a current cut-off structure is set in the main circuit where the first terminal is electrically connected to the electrode assembly, and the second terminal is always electrically insulated from the current cut-off structure. When the battery is overcharged, internal gas is generated, and the internal air pressure increases to a certain level. When the value is high, the current cut-off structure is activated to disconnect the circuit between the first terminal and the electrode assembly, preventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M10/04H01M50/30
CPCH01M10/04H01M50/30Y02E60/10Y02P70/50
Inventor 李全坤林永寿蔡如来
Owner CONTEMPORARY AMPEREX TECH CO
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