Paralyzed battery valve

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 , .

Can a PRV be opened after a battery safety valve is opened?

Experimental tests have shown that conventional PRV that rely on pressure differentials are difficult to open in time after the battery safety valve is opened. The VE generated during battery TR cannot pass through the PRV membrane. In addition, numerical studies revealed that larger sizes of PRV are better.

Can electric-controlled pressure relief valve prevent explosions caused by thermal runaway?

This paper addresses the safety concerns associated with LCBPs and proposes an effective solution for explosion relief. 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

How does a LCBP PRV work?

This PRV had a built-in sound recognition module to detect the opening of the battery safety valve quickly and sensitively. When the battery fault detection module identified that the battery safety valve was open, the PRV was opened immediately to release FEGs inside the LCBP.

What is a battery fault detection module (PRV)?

When the battery fault detection module identified that the battery safety valve was open, the PRV was opened immediately to release FEGs inside the LCBP. The novel PRV’s hardware and software components were developed, along with its integration with the BMS to modify the charging and discharging strategy of battery.

What happens if the safety valve outlet of LCBP explodes?

The temperature of the safety valve outlet of battery increased from 40.3 to 215.4 °C. The high temperature inside the battery ignited the electrolyte. Flames erupted from the safety valve outlet of battery, causing the FEGs in the LCBP to explode. The explosion damaged the LCBP casing, deforming the top cover and body.