| CPC H01M 50/383 (2021.01) [H01M 10/425 (2013.01); H01M 10/482 (2013.01); H01M 10/486 (2013.01); H01M 50/317 (2021.01); H01M 2010/4271 (2013.01)] | 18 Claims |
|
1. A firefighting method for energy storage, applied to a firefighting system for energy storage, wherein the firefighting system for energy storage comprises a plurality of temperature sensors, a plurality of gas detectors, a plurality of exhaust fans, a plurality of firefighting apparatuses, and a battery management system (BMS); a plurality of battery clusters are disposed in an energy-storage container, and each of the plurality of battery clusters comprises a plurality of battery modules, wherein one gas detector and one temperature sensor are disposed in each of the plurality of battery modules; the plurality of battery clusters, the plurality of exhaust fans, and the plurality of firefighting apparatuses are in one-to-one correspondence; and the method comprises:
turning on, by the BMS, a first exhaust fan corresponding to a first battery cluster where a first battery module is disposed to exhaust a preset gas from the energy-storage container, when a first gas detector disposed in the first battery module detects the preset gas, wherein the first battery module is any one of a plurality of battery modules in the first battery cluster;
obtaining, by the BMS, a concentration of the preset gas at each moment in a preset period through the first gas detector and a second gas detector adjacent to the first gas detector, wherein
obtaining, by the BMS, the concentration of the preset gas at each moment in the preset period through the first gas detector and the second gas detector adjacent to the first gas detector comprises:
obtaining a first concentration of the preset gas detected by the first gas detector at each moment in the preset period and obtaining a second concentration of the preset gas detected by the second gas detector at each moment;
obtaining a first relative distance between the second gas detector and the first exhaust fan;
determining a wind speed corresponding to the second gas detector, based on an operating power of the first exhaust fan and the first relative distance between the second gas detector and the first exhaust fan;
determining an initial diffusion rate of the preset gas in air, based on molecular weight of the preset gas and molecular weight of the air;
obtaining a relative direction between a diffusion direction of the preset gas diffused to the second gas detector and the first exhaust fan, wherein the relative direction comprises an opposite direction or a reverse direction of the opposite direction;
adjusting the initial diffusion rate of the preset gas in the air based on the wind speed and the relative direction, to obtain a diffusion rate of the preset gas diffused to the second gas detector;
obtaining a two-dimensional size of each of the plurality of battery modules and a second relative distance between the first gas detector and the second gas detector;
determining the diffusion concentration of the preset gas diffused to the second gas detector at each moment, based on the diffusion rate, the two-dimensional size of each of the plurality of battery modules, the second relative distance, and the second concentration; and
determining the concentration of the preset gas at each moment in the preset period, based on the diffusion concentration of the preset gas diffused to the second gas detector at each moment and the first concentration of the preset gas;
obtaining, by the BMS, a temperature of the first battery module at each moment in the preset period through a first temperature sensor disposed in the first battery module; and
determining, by the BMS, whether to turn on a first firefighting apparatus corresponding to the first battery cluster based on the concentration of the preset gas at each moment in the preset period and the temperature of the first battery module at each moment in the preset period, to extinguish a fire at a battery module in the energy-storage container.
|