An explosion-proof protection structure of a large-capacity lithium battery

An explosion-proof protection, lithium battery technology, used in lithium batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve problems such as large volume, lithium battery explosion, and battery heat dissipation, so as to improve the heat dissipation effect and improve the circulation effect. , to avoid the effect of poor heat dissipation

Active Publication Date: 2022-04-19
承德神奥新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium batteries have high energy density and long life, so they are widely used. However, when lithium batteries are in use, thermal runaway will cause lithium batteries to explode. The main reasons for thermal runaway are: the temperature of the battery is too high or the heat dissipation of the battery is too high. Not good, leading to poor heat dissipation of the battery, especially for some large-capacity lithium batteries, because it consists of multiple battery packs, the volume is large, the heat of the battery packs located in the internal area is less likely to dissipate, and the risk of explosion is greater. Therefore, it is necessary to provide an explosion-proof protection structure that dissipates the heat generated by the battery pack in time to improve the safety performance of large-capacity lithium batteries

Method used

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  • An explosion-proof protection structure of a large-capacity lithium battery
  • An explosion-proof protection structure of a large-capacity lithium battery
  • An explosion-proof protection structure of a large-capacity lithium battery

Examples

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Effect test

Embodiment 1

[0034] The invention provides an explosion-proof protection structure of a large-capacity lithium battery, referring to figure 1 , Figure 8 , Figure 9, as a specific embodiment, it includes a main body 1, a battery accommodating chamber 10 disposed inside the main body 1, and a first chamber 11 and a second chamber 12 respectively disposed on opposite sides of the battery accommodating chamber 10, A plurality of heat conduction plates 101 are evenly spaced in the battery accommodation cavity 10, and a channel 102 communicating with the first cavity 11 and the second cavity 12 is arranged in the heat conduction plate 101, and the first cavity 11 A movable plate 13 is arranged inside, and the movable plate 13 is arranged parallel to the first side wall of the first cavity 11, and the first side wall is that the first cavity 11 is adjacent to the battery accommodating cavity 10 The side wall of the movable plate 13 is slidingly and sealingly engaged with the inner side wall o...

Embodiment 2

[0038] The present invention provides an explosion-proof protection structure for a large-capacity lithium battery. As a further preferred embodiment, the first cavity 11 is set above the battery accommodating cavity 10, and the second cavity 12 is set above the Below the battery accommodating chamber 10, the difference between it and Embodiment 1 is that the cooling liquid is provided with heat-conducting expansion particles 3, and the density of the heat-conducting expanding particles is not less than that of the cooling liquid when it is not expanded, and the density is not less than that of the cooling liquid when it is expanded. The density is smaller than the cooling liquid, and the thermally conductive expandable particles 3 can pass through the channel 102 when expanding.

[0039] refer to figure 1 , Figure 10 , as a specific embodiment, by adding thermally conductive expansion particles 3 in the cooling liquid, when the battery is not working or the temperature is l...

Embodiment 3

[0048] The present invention provides an explosion-proof protection structure of a large-capacity lithium battery. As a further improvement, refer to Figure 3-Figure 5 , which is different from Embodiment 2 in that: the valve assembly 23 also includes a first guide cylinder 232 and a second guide cylinder 233 arranged in parallel at intervals, and a first piston 2321 is slidably disposed in the first guide cylinder, so The second piston 2331 is slidably arranged in the second guide cylinder 233, and the first cavity of the first guide cylinder 232 located in the first piston communicates with the second cavity of the second guide cylinder located in the second piston. The side of the first piston 2321 facing away from the first cavity is provided with a first locking rod 2322 that can extend out of the first guide cylinder, and the first guide cylinder is located on the side away from the first piston. The cavity of the first chamber is filled with expansion fluid and communi...

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PUM

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Abstract

The invention provides an explosion-proof protection structure for a large-capacity lithium battery. There are passages in the board, a movable board and a driving assembly for driving the movable board to and fro in the first chamber, and a heat dissipation device arranged outside the body. The first chamber is provided with a first passage, and the second chamber is provided with a In the second channel, the two liquid inlets and outlets of the cooling device communicate with the first channel and the second channel respectively. The second one-way valve, which allows liquid to flow into the second chamber, drives the movable plate to reciprocate through the drive assembly, so that the heat-absorbing medium in the first chamber and the second chamber can circulate in the first chamber, the second chamber and the heat sink , to achieve the purpose of cooling the large-capacity lithium battery and improve safety.

Description

technical field [0001] The invention generally relates to the technical field of battery protection, in particular to an explosion-proof protection structure for a large-capacity lithium battery. Background technique [0002] Lithium batteries have high energy density and long life, so they are widely used. However, when lithium batteries are in use, thermal runaway will cause lithium batteries to explode. The main reasons for thermal runaway are: the temperature of the battery is too high or the heat dissipation of the battery is too high. Not good, leading to poor heat dissipation of the battery, especially for some large-capacity lithium batteries, because it consists of multiple battery packs, the volume is large, the heat of the battery pack located in the internal area is less likely to dissipate, and the risk of explosion is greater. Therefore, it is necessary to provide an explosion-proof protection structure that dissipates the heat generated by the battery pack in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/653H01M10/6554H01M10/6556H01M10/6568H01M10/052H01L41/113
CPCH01M10/613H01M10/6554H01M10/6568H01M10/6556H01M10/653H01M10/052H10N30/30Y02E60/10
Inventor 董娜姜楠楠孟凡净孙淑瑞田长留花少震孔春辉刘静香
Owner 承德神奥新能源科技有限公司
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