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Secondary battery explosion-proof shell and battery

A technology for secondary batteries and explosion-proof casings, which is applied in the field of secondary battery explosion-proof casings and batteries, can solve the problems of poor safety performance of explosion-proof casings, achieve good consistency of air pressure resistance, uniform force, and improve safety performance Effect

Inactive Publication Date: 2010-06-23
江西双华新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect of poor safety performance of the existing secondary battery explosion-proof casing, provide a secondary battery explosion-proof casing with good safety performance, secondary batteries and their preparation methods

Method used

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  • Secondary battery explosion-proof shell and battery
  • Secondary battery explosion-proof shell and battery
  • Secondary battery explosion-proof shell and battery

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Embodiment Construction

[0016] The explosion-proof housing described in the present invention can be used in various secondary batteries, taking cylindrical secondary batteries as an example, such as Figure 4 As shown, the explosion-proof casing of the secondary battery at least includes a part 1 whose thickness is smaller than that of the casing, and a groove 2 is also provided on the part 1 whose thickness is smaller than the thickness of the casing.

[0017] The part 1 whose thickness is smaller than the thickness of the shell can act as an explosion-proof membrane. When the internal pressure of the battery increases sharply and reaches the rupture limit of the safety explosion-proof membrane, since the thickness of the part 1 is thinner than the thickness of the shell, Under the impact of the strong internal pressure of the battery, the accumulated gas can be quickly discharged.

[0018] The area size, thickness and compressive strength of the part 1 whose thickness is smaller than the thickness...

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Abstract

The invention provides an explosion proof shell of a secondary battery, wherein the shell at least comprises a part 1 with thickness less than the shell thickness and a groove 2 arranged on the part 1 with thickness less than the shell thickness. When internal pressure of the battery increases tremendously to burst limit of a safety explosion proof film, the part 1 with thickness less than the shell thickness is broken through by the internal pressure of the battery and the accumulative gas is discharged instantly. The battery has a good safety performance.

Description

technical field [0001] The invention relates to a battery casing, more specifically, to an explosion-proof casing of a secondary battery and a battery. Background technique [0002] In order to make the secondary battery have good safety performance in use, a safety explosion-proof device assembly is generally arranged on the battery case. When the internal pressure of the battery is small, the safety explosion-proof device component can play the role of sealing the vent hole; when the internal pressure of the battery increases sharply due to unexpected reasons, such as a short circuit of the battery, the safety explosion-proof device component will be opened in time to discharge gas and reduce the internal pressure of the battery in time. [0003] Such as Figure 1 to Figure 3 As shown, the secondary battery with a safety explosion-proof device assembly includes a battery body 7 and a safety explosion-proof device assembly 8. The battery body 7 includes a casing 9 and posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/12H01M2/02H01M10/04H01M50/10H01M50/30
CPCY02E60/10Y02P70/50
Inventor 汪鲁建李德军
Owner 江西双华新能源股份有限公司