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

A protection structure and over-temperature protection technology, applied in structural parts, fire rescue, electrical components, etc., can solve the problems of heat-sensitive metal sheet deformation temperature drop, deformation that cannot reach the temperature, and current cut-off, etc.

Active Publication Date: 2021-09-14
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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  • Temperature protection structure with over-temperature protection and fire extinguishing functions and protection method
  • Temperature protection structure with over-temperature protection and fire extinguishing functions and protection method
  • Temperature protection structure with over-temperature protection and fire extinguishing functions and protection method

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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 with over-temperature protection and fire extinguishing functions and a protection method. The temperature protection structure comprises a thermosensitive sealing bag and a fire extinguishing medium packaged in the thermosensitive sealing bag; the upper end part of the thermosensitive sealing bag is provided with a plurality of electric connecting sheets used for being connected with a battery module in series; safety elastic sheets are arranged between the plurality of electric connecting sheets; when the temperature of the thermosensitive sealing bag rises, the fire extinguishing medium expands to enable the safety elastic sheets to bounce, and connection between the safety elastic sheets and the electric connecting sheets is cut off. The temperature protection structure disclosed by the invention has an over-temperature protection function and a fire extinguishing function at the same time, can timely capture battery heating and switch off a circuit according to the temperature in the battery module, can be recycled, can prevent a battery cell from catching on fire due to thermal runaway, and has a fire extinguishing effect on the battery cell which is subjected to thermal runaway.

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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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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