Battery protection device

Abstract

One or more embodiments of the invention provide a battery protection device, and the device comprises a battery shell, poles at the two ends of the battery shell are electrically connected with connecting pieces to be connected and conducted with tabs of a battery core body, a liquid inlet pipe is externally connected with an expansion valve to introduce cooling liquid, and a liquid outlet pipe is attached to the outer side wall of the battery core body to cool and dissipate heat. Expansion liquid is filled in the temperature sensing bulb so as to sense the temperature of the liquid outlet pipe, control the opening degree of the expansion valve and automatically adjust heat dissipation in real time; the expansion valve is further provided with a switching mechanism, a screw and a nut which are meshed with each other in a threaded mode, the hollow interior of the nut is filled with flame-retardant powder, and an elastic film is attached to the outer side of the nut in an original state, and is fixedly clamped through an elastic rope. When the temperature sensed by the temperature sensing bulb reaches a limit threshold value, the switch mechanism can be triggered to trigger and conduct the top thorn mechanism, so the connecting piece and the elastic rope are broken to scatter the flame-retardant powder, and therefore, the functions of timely extinguishing fire and isolating thebattery are realized.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field of batteries, and in particular, to a battery protection device. Background technique [0002] As batteries are used more and more widely, battery safety issues are becoming more and more prominent. The battery will generate a lot of heat when it supplies power, so it is necessary to effectively cool the battery. In case of external short circuit or other accidents, the impact of high current will cause overheating, which may even cause the battery to burn and explode. Heat dissipation will not only affect the life of the battery, but also increase the instability of the battery and pose a safety hazard. In the prior art, the battery is generally cooled by continuously feeding cold air or blowing air into the battery box. However, a On the one hand, it does not have the function of automatic adjustment with the change of battery temperature, so it cannot match the different te...

AI Technical Summary

Problems solved by technology

[0002] As batteries are used more and more widely, battery safety issues are becoming more and more prominent. The battery will generate a lot of heat when it supplies power, so it is necessary to effectively cool the battery. In case of external short circuit or other accidents, the impact of high current will cause overheating, which may even cause the battery to burn and explode. Heat dissipation will not only affect the life of the battery, but also increase the instability of the battery and pose a safety hazard. In the prior art, the battery is generally cooled by continuously feeding cold air or blowing air into the battery box. However, a On the one hand, it does not have the function of automatic adjustment with the change of battery temperature, so it cannot match the different temperatures of the battery in real-time use to maintain the ideal state of battery use, especially when the battery temperature rises abnormally and rapidly, it is difficult to adjust heat dissipation in time to ensure The safety and stability of the battery. On the other hand, when the battery burns or even explodes in an accident, the cooling air introduced at this time will help the combustion to a certain extent. As a result, the battery is very easy to burn violently, and then more serious secondary accidents occur, and the safety is poor

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