New energy battery side pressure relief principle diagram

Can a pressure relief valve prevent a thermal runaway?

Installing an electric-controlled pressure relief valve with battery fault detection capability on a liquid-cooled battery pack can prevent explosions caused by thermal runaway. 1. Introduction

What are battery side reactions triggered by overcharge?

The battery side reactions triggered by overcharge are, firstly, excess lithium embedded in the negative electrode, which will grow lithium dendrites on the negative electrode surface (N/P ratio will affect the starting SOC of lithium dendrite growth).

How does a battery safety valve work?

A safety valve was installed in the battery to prevent explosions due to excessive internal pressure. A battery tester (brand: NEWARE) overcharged the battery. Thermocouples measured the temperature. A decibel meter (brand: Delixi, model: DSM-D1) analyzed the opening duration of the battery safety valve , .

What is a pressure relief valve (PRV) on a LCBP?

The inherent safety issues associated with LIBs are difficult to eliminate . Pressure relief valve (PRV) on LCBPs serves as crucial backup protection devices, effectively reducing the accumulation and explosive potential of FEGs .

How does the size of a PRV affect pressure relief efficiency?

The size of the PRV largely determined the pressure relief efficiency. The front panel of the pack was equipped with BMS, circuit breakers, terminal blocks, liquid cooling pipeline controllers, etc., which imposed strict restrictions on the size of the PRV.

What happens when LCBP batteries vent?

When the internal batteries vent due to TR or when an explosion occurs inside the LCBP, the internal pressure rapidly increases, compressing the spring and pushing the piston to open the exhaust channel for pressure relief. The membrane PRV has a waterproof and breathable membrane on the exhaust channel.