Energy storage battery box air pressure detection

Is detection of pressure variation effective in preventing battery tr?

By comparing the results of these two experiments, it is clear that the detection of pressure variation is an effective way to provide warnings for, and thus avoid, battery TR. We set the warning signal for different experimental conditions as the module-space air pressure was increased by 1 hPa in 10 s.

Does the air pressure of an energy-storage module vary when a TR occurs?

In this study, we developed and verified that the air pressure of an energy-storage module varies when a TR induced by different fault types (overcharging and overheating) occurs in a prismatic LiFePO 4 battery.

How many ventilated battery modules are in the energy-storage cabin?

The energy-storage cabin was equipped with 300 ventilated battery modules. As shown in Fig. 14 (d) and (e), we selected six modules (P1–P6) and installed air-pressure sensors inside them. The origin of the coordinate system is marked in Fig. 14 (d) and (e) (unit: m).

Can module-space air-pressure variation provide safety warnings for battery thermal runaway?

This paper proposes a safety warning method based on module-space air-pressure variation to provide warnings for battery thermal runaway (TR). TR is induced by different battery faults (overcharge, overheat), and the air pressure in the module space varies during the battery venting process.

How accurate is the air pressure sensor?

An air-pressure sensor was used to detect air pressure data in the module space. The measurement range was 300–1100 hPa, and the accuracy was 0.06 hPa. Fig. 2 (c) shows the experimental battery. A k-type thermocouple was fixed on the surface of the battery to detect the surface temperature during TR. Fig. 2.

What is the air pressure in the module space?

At t 4 = 1905 s, the air pressure in the module space reached a maximum, the detected module-space air pressure was 1.15.95 hPa, the battery terminal voltage was 2.99 V, and the battery surface temperature was 178.5 °C. Fig. 11.