A temperature protection structure and protection method with over-temperature protection and fire extinguishing functions

A protection structure and over-temperature protection technology, which is applied to structural parts, fire rescue, non-aqueous electrolyte batteries, etc., can solve problems such as unreachable temperature deformation, lower deformation temperature of heat-sensitive metal sheets, and current cut-off, so as to prevent heat loss. The effect of an out-of-control fire

Active Publication Date: 2022-04-19
ZHEJIANG NARADA POWER SOURCE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the state of high current, the deformation temperature of the heat-sensitive metal sheet will be greatly reduced, and the accurate temperature deformation cannot be achieved, so that the current cannot be accurately cut off at high temperature. The function of the open current cannot solve the problem of fire and explosion caused by the thermal runaway of the battery cell

Method used

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  • A temperature protection structure and protection method with over-temperature protection and fire extinguishing functions
  • A temperature protection structure and protection method with over-temperature protection and fire extinguishing functions
  • A temperature protection structure and protection method with over-temperature protection and fire extinguishing functions

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Embodiment 1

[0038] This embodiment provides a temperature protection structure with over-temperature protection and fire extinguishing functions. The overall shape and volume of the temperature protection structure match the battery cells 8 of the battery module 7 and are connected in series with the battery module 7 .

[0039] see figure 1 and figure 2 , the temperature protection structure includes a heat-sensitive sealing bag 1 and perfluorohexanone packaged in the heat-sensitive sealing bag 1, the addition amount is 70g, and the upper end of the heat-sensitive sealing bag 1 is provided with a multi-connector for connecting with the battery module 7 in series. An electrical connecting piece, including a first electrical connecting piece 2 connected to the positive pole and a second electrical connecting piece 3 connected to the negative pole, a safety spring 4 is arranged between the first electrical connecting piece 2 and the second electrical connecting piece 3, so One end of the s...

Embodiment 2

[0044] This embodiment provides a temperature protection structure with over-temperature protection and fire extinguishing functions. The overall shape and volume of the temperature protection structure match the battery cells 8 of the battery module 7 and are connected in series with the battery module 7 .

[0045] see figure 1 and figure 2, the temperature protection structure includes a heat-sensitive sealing bag 1 and perfluorohexanone packaged in the heat-sensitive sealing bag 1, the addition amount is 50g, and the upper end of the heat-sensitive sealing bag 1 is provided with a multi-connector for connecting with the battery module 7 in series. An electrical connecting piece, including a first electrical connecting piece 2 connected to the positive pole and a second electrical connecting piece 3 connected to the negative pole, a safety spring 4 is arranged between the first electrical connecting piece 2 and the second electrical connecting piece 3, so One end of the sa...

Embodiment 3

[0050] This embodiment provides a temperature protection structure with over-temperature protection and fire extinguishing functions. The overall shape and volume of the temperature protection structure match the battery cells 8 of the battery module 7 and are connected in series with the battery module 7 .

[0051] see figure 1 and figure 2 , the temperature protection structure includes a heat-sensitive sealing bag 1 and perfluorohexanone packaged in the heat-sensitive sealing bag 1, the addition amount is 100g, and the upper end of the heat-sensitive sealing bag 1 is provided with a multi-connector for connecting with the battery module 7 in series. An electrical connecting piece, including a first electrical connecting piece 2 connected to the positive pole and a second electrical connecting piece 3 connected to the negative pole, a safety spring 4 is arranged between the first electrical connecting piece 2 and the second electrical connecting piece 3, so One end of the ...

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Abstract

The invention provides a temperature protection structure and protection method with over-temperature protection and fire extinguishing functions, including a heat-sensitive sealing bag and a fire-extinguishing medium packaged in the heat-sensitive sealing bag, the upper end of the heat-sensitive sealing bag is provided with a A plurality of electrical connecting pieces connected in series in the battery module, safety elastic pieces are arranged between the plurality of electrical connecting pieces, when the temperature of the heat-sensitive sealed bag rises, the fire extinguishing medium expands to make the safety elastic pieces spring up, disconnecting the electrical connection connections between slices. The temperature protection structure of the present invention has an over-temperature protection function and a fire extinguishing function at the same time. According to the temperature in the battery module, it can catch the heat of the battery in time, disconnect the circuit, and can be recycled, and can prevent the thermal runaway of the battery cell from catching fire. The out-of-control battery cells have the effect of extinguishing the fire.

Description

technical field [0001] The invention belongs to the technical field of lithium battery fire extinguishing, and relates to a lithium battery temperature protection structure and protection method with over-temperature protection and fire extinguishing functions. Background technique [0002] In recent years, with the gradual advancement of energy transformation, high specific energy batteries have become more and more widely used in fields such as electric vehicles and smart grids. Lithium-ion batteries have become a leader in the field of new energy due to their long cycle life and high energy density. [0003] During the use of the battery module, due to overcharge, overdischarge, overcurrent, etc., the internal temperature of the battery will rise, and there will be safety hazards such as fire and explosion in serious cases. There are many temperature protectors on the market, most of which are thermistors or heat-sensitive metal sheets. When the internal temperature of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/375H01M50/383H01M10/052A62C3/16
CPCH01M50/375H01M50/383H01M10/052A62C3/16Y02E60/10
Inventor 胡雨萌刘桃松陈冬屠芳芳党志敏张焱张文杨东辉相佳媛李敏
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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