New energy automobile power battery safety system

Abstract

The invention discloses a power battery safety system for a new energy vehicle, which includes a control unit, an alarm sensor and a fire extinguishing device. Wherein the alarm sensor is arranged next to the power battery pack of the new energy vehicle for detecting the environmental conditions of the battery pack, the alarm sensor is connected with the control unit, and the control unit is connected with the fire extinguishing device. When the alarm sensor detects that the environmental condition of the battery pack exceeds a preset value, it sends an alarm message to the control unit, and the control unit triggers the fire extinguishing device according to the alarm message. The power battery safety system for new energy vehicles involved in the present invention can detect the abnormal temperature of the power battery pack in time and quickly deal with it, and effectively solve the time from the discovery of the sudden fire of the new energy vehicle to the implementation of the fire extinguishing process. Lag problem, reduce security risks.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a power battery safety system used in new energy vehicles for preventing the battery box from catching fire and / or exploding. Background technique [0002] As the problem of environmental pollution is becoming more and more serious, the governments of various countries have become more and more strict on one of the main sources of pollution: the emission of vehicle exhaust, which has brought great opportunities to the rapid development of new energy vehicles to a certain extent. It also makes new energy vehicles, mainly new energy vehicles, begin to enter the public life. [0003] However, as the number of new energy vehicles continues to increase, spontaneous combustion and fire incidents have gradually begun to increase. After careful analysis, it is mainly the battery problem of new energy vehicles, which has become the main cause of the fire. [0004] At present, power ba...

AI Technical Summary

Problems solved by technology

However, due to the production process and other reasons, there will be certain differences in the capacity and performance of each battery. Batteries with small capacity and poor performance will be over-discharged or over-charged, causing the diaphragm between the positive and negative electrodes of the battery to be broken down and short-circuited. , and then generate high temperature, overheating will vaporize the electrolyte, expand and cause the battery case to rupture, and even cause fire or explosion and many other problems

[0006] In order to balance different battery packs, the industry adopts BMS (BATTERY MANAGEMENT SYSTEM, battery management system) system, which can monitor the voltage, current and temperature of each battery pack in real time, balance the voltage of each single battery, and make each single cell in the battery pack The capacity and performance of the battery are as consistent as possible, but the reliability of the current BMS system is not high, and it is impossible to completely eliminate the hidden danger of fire and explosion in the battery box of new energy vehicles.

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