A lithium battery high temperature protection structure and lithium battery

A protective structure and lithium battery technology, which is applied in the direction of secondary batteries, cell structure combination, secondary battery repair/maintenance, etc., can solve the problems of thermal runaway and fire of lithium batteries, insufficient safety protection performance, etc., and achieve reasonable structure and low cost Effect

Active Publication Date: 2019-11-05
TIANJIN ENERGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a lithium battery high-temperature protection structure in order to solve the problem of insufficient safety protection performance of the existing lithium battery and the problem that the lithium battery is prone to thermal runaway and fire

Method used

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  • A lithium battery high temperature protection structure and lithium battery
  • A lithium battery high temperature protection structure and lithium battery
  • A lithium battery high temperature protection structure and lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment one, such as Figure 2-Figure 6 As shown, the KSD temperature switch 2 is a normally open thermal bimetal jumping temperature control switch, and its performance matches the size and capacity of the battery body 5. When the size and capacity of the battery body 5 are large, a large size and The KSD temperature switch 2 with strong overcurrent capability, and the closing trigger temperature of the KSD temperature switch 2 can be selected according to actual needs. In this embodiment, the operating temperature of the KSD temperature switch 2, that is, the upper limit of the safe temperature of the lithium battery, is selected as 100°C. The short-circuit overcurrent connector 3 is made of a high internal resistance alloy material, such as: nickel-chromium alloy, iron-chromium-aluminum alloy, and its resistance value makes the short-circuit current value limited to 1-3 times of the lithium battery capacity, and the short-circuit current I 短路 =U 电池 / R 短路过电流连接件 ...

Embodiment 2

[0041] Embodiment two, such as Figure 7 , Figure 8The shown short-circuit overcurrent connector 3 is made of metal materials with high conductivity, such as copper and aluminum. In order to control the short-circuit current and avoid overheating of the KSD temperature switch 2 and the short-circuit over-current connector 3 caused by excessive short-circuit current, a current-limiting resistor 6 is connected in series with the short-circuit over-current connector 3 to achieve the purpose of adjusting the short-circuit current. The short-circuit current I 短路 =U 电池 / (R 短路过电流连接件 +R 限流电阻 ), and also limit the short-circuit current value to 1-3 times the capacity of the lithium battery.

[0042] The present invention also proposes a lithium battery, including the high temperature protection structure of the lithium battery as described above. Such as Figure 9 As shown, the lithium battery module 9 is composed of a plurality of lithium batteries using the lithium battery hig...

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Abstract

The invention relates to the technical field of lithium battery high-temperature protection, and in particular to a lithium battery high-temperature protection structure and a lithium battery. The structure comprises a lithium battery Block frame, a KSD temperature switch, short circuit over-current connecting parts and a heat conduction layer, wherein the lithium battery Block frame is of a frame structure, is used for fixing a battery main body, and comprises an anode pile and a cathode pile for connecting the anode and the cathode of the battery main body, and a clamping groove at the inner side of the lithium battery Block frame; the short circuit over-current connecting parts are conductors which are fixed inside the clamping groove in the inner side of the lithium battery Block frame, and are used for connecting the anode pile and the cathode pile of the lithium battery Block frame with the KSD temperature switch respectively; the KSD temperature switch is mounted on the lithium battery Block frame, is normally opened, and has a fixed value temperature closing function; and the heat conduction layer is adhered to the surface of the battery main body and contacts a temperature sensing point of the KSD temperature switch. The lithium battery high-temperature protection structure has the functions of temperature recognition and over-temperature security short circuit triggering, the lithium battery has gentle thermal runaway and heat discharge, fire or explosion can be avoided, and a function of high-temperature protection on the lithium battery is achieved.

Description

technical field [0001] The invention relates to the technical field of lithium battery high temperature protection, in particular to a lithium battery high temperature protection structure and a lithium battery. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the advantages of small size, light weight, high energy and high power, low self-discharge rate, environmental protection and long service life, lithium batteries have gradually become the mainstream of power batteries. [0003] With the rapid development of the new energy vehicle market, lithium batteries have been widely used, and their safety issues have become increasingly prominent. Fire accidents of new energy vehicles have occurred from time to time, and their safety has become the focus of social attention. Most of the fires of new energy vehicles are caused by the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/613H01M10/635H01M10/655H01M10/0525
CPCH01M10/0525H01M10/425H01M10/613H01M10/635H01M10/655Y02E60/10
Inventor 李天龙杨春乐高秀玲王立仕王驰伟
Owner TIANJIN ENERGIES
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