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Safe lithium battery case

A technology for lithium batteries and battery casings, which is applied to battery components, circuits, electrical components, etc., can solve problems such as deformation of battery casings, failure to consider pressure relief effects, and low commercial value, so as to avoid battery The effect of reduced capacity, suitable for popularization and use, and simplified production process

Inactive Publication Date: 2008-09-03
无锡瑞通电源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

②The valve body is sealed and explosion-proof. This kind of design is complicated, takes up a lot of space, and costs high, so the commercial value is very small
The above-mentioned explosion-proof structures are all set on the top surface of the lithium battery case, on the same surface as the electrode lead-out, and when designing the explosion-proof structure, only the pressure relief holes are considered, and the pressure relief effect is not considered, nor can it solve the battery problem. The problem of shell deformation

Method used

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Examples

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Effect test

Embodiment 1

[0020] Embodiment one: see attached figure 1 to attach Figure 4 As shown, a safe lithium battery case includes a battery case body 1 and an electrode lead-out sealing structure, the case body is a narrow strip structure, the height of the case body is greater than 100mm, and the The height is greater than 10 times the width or thickness, and a plurality of explosion-proof holes 2 are arranged on the long and narrow side of the shell body, and the explosion-proof holes are covered with an explosion-proof film 3, and the explosion-proof needles 4 are arranged on the explosion-proof holes , the explosion-proof lancet can be punched and formed when the shell is punched.

[0021] When the battery is in use, when charging produces outgassing, the explosion-proof film bulges outward to provide a gas storage space. When the pressure inside the battery casing is too high, the explosion-proof film ruptures, releasing the pressure in time to prevent the battery from exploding.

Embodiment 2

[0022] Embodiment 2: A safe lithium battery case for assembling a 10AH power lithium battery, which is in the shape of a cuboid, with a body height of 400mm, a width of 28mm, and a thickness of 12mm. There are 25 explosion-proof holes arranged on the two narrow and long sides. Each explosion-proof hole is a circle punched with a needle structure.

[0023] Since 50 explosion-proof holes are provided in this embodiment, it is equivalent to one explosion-proof hole corresponding to every 0.2AH. The height of the original 10AH lithium battery case is about 80mm, and there is only one explosion-proof hole on the top. Therefore, the shell of this embodiment is not easy to explode and has high safety; meanwhile, there is a variable space for accommodating gas evolution, so the service life can be extended to 1.5 times of the original.

Embodiment 3

[0024] Embodiment 3: A safe lithium battery case is in the shape of a cuboid, the height of the case body is greater than 100mm, and at least 10 explosion-proof holes are provided on the narrow and long sides of both sides, and each of the explosion-proof holes is oblong or elliptical. shape, square or triangle.

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Abstract

The invention discloses a safety lithium battery shell which includes a battery shell body and an electrode inducing sealing structure. The safety lithium battery shell has characteristics in that: the shell body is a narrow strip structure, and has height more than 100mm, the shell body height is 10 times greater than width or thickness, the shell body narrow side has a row of safety explosion proof structure. The shell has narrow strip structure, and has the explosion proof structure in narrow side which can play a role of explosion proof effectively and solve problem of battery gassing.

Description

technical field [0001] The invention relates to a power battery assembly, in particular to a safe lithium battery case. Background technique [0002] Lithium batteries are widely used in various products, including household appliances and electric vehicles, due to their advantages of light weight, small size, large capacity, and fast charging speed. [0003] However, for power batteries used in electric vehicles, due to the high energy density inside the battery, the internal electrolyte will produce gassing during charging and discharging, especially when there is a short circuit inside the battery or abnormal charging. The rapid increase of the battery will cause the gas pressure inside the battery to rise sharply, resulting in increased deformation of the container, electrolyte leakage, and even explosion when the pressure limit is exceeded. At the same time, during the use of the battery, charging and gas generation will lead to a decrease in battery performance and af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/12H01M50/131H01M50/342
CPCY02E60/10
Inventor 崔晓宏
Owner 无锡瑞通电源有限公司
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