Separated automatic fire extinguishing system of lithium ion battery for new energy vehicle

Abstract

The invention provides a separated automatic fire extinguishing system of a lithium ion battery for a new energy vehicle. The separated automatic fire extinguishing system comprises a battery box provided with partition plates, a battery pack is arranged in each partition, and the partition also comprises a sensor set formed by combining a plurality of sensors, the sensors transmit sensed signalsto BMS through a circuit, the BMS controls an alarm to give an alarm by analyzing the signals and makes the alarm lamp of a specific single corresponding battery module give the alarm, and the BMS also transmits control signals to a fire extinguishing device by analyzing the signals, so that the fire extinguishing device opens valves and delivers a fire extinguishing agent. The fire extinguishingagent can reach the partition where a specific out-of-control battery module is located through a pipeline, and spray the fire extinguishing agent onto the out-of-control module through nozzles, thusrealizing accurate fire extinguishing until battery fire is extinguished, and preventing the fire from spreading to other battery modules and even into compartments.

Description

technical field [0001] The invention aims to improve the safety of new energy vehicles, and provides a complete fire extinguishing system for the fire of lithium-ion battery packs used in vehicles. This technology mainly lies in the construction of a separate fire extinguishing system for lithium-ion batteries used in vehicles. Background technique [0002] Lithium-ion batteries have been widely used in new energy vehicles due to their advantages such as high energy density, high output voltage, long cycle life, low environmental pollution, and no memory. With the wide application of lithium-ion batteries in life, its safety Sexual issues are also getting more and more attention. [0003] There are many heat generating factors inside the lithium-ion battery. If the heat generation rate inside the lithium-ion battery is greater than the heat loss rate, the reaction temperature in the system will continue to rise. As a result, two extreme situations may occur: one situation ...

AI Technical Summary

Problems solved by technology

[0004] At present, although there is a lot of research on improving battery safety, battery safety accidents still occur frequently. In the first half of 2018 alone, more than 10 electric vehicle safety accidents caused by lithium-ion batteries were reported at home and abroad. Therefore, it is urgent Lithium-ion battery safety issues need to be addressed

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