The Ministry of Public Security issued the "Notice on Strengthening the Prevention of Electric Vehicle Fires in Residential Areas" at the front-end time. The electric vehicles here (electric bicycles, electric motorcycles and electric tricycles), let us talk about the fire safety of electric vehicles. .
The safety of battery cars compared with the safety of traditional cars is mainly the safety of high voltage and lithium batteries. The explosion and combustion of lithium batteries is a manifestation of thermal runaway. The main reason is that the heat generated by the ternary electrode material is higher than that of lithium iron phosphate and generates oxygen.
The first part of electric vehicle fire protection configuration
US NFPA "Electric Vehicle Emergency Guide" Reference Document 1. The US National Highway Traffic Safety Administration "Interim Guide for Electric and Hybrid Electric Vehicles with High Voltage Batteries" recommends the use of continuous, large quantities of fire water as fire extinguishing agent.
The considerations here are mainly for the car:
The high-voltage battery has a protective case, and it is difficult for the fire extinguishing agent to directly reach the battery unit. A lot of water can cool the battery and prevent the flame from spreading to nearby units
Remarks: According to the method of contacting the battery, Fire Fighter Safety and Emergency Response for Electric Drive and Hybrid Electric Drive Vehicles. Quincy believes that the use of dry powder, carbon dioxide and foam fire extinguishing agent is better.
Battery A (4.4Kwh) requires 275-1060 gallons of water
Battery B (16.5kwh) requires 1165-2639 gallons of water
Some basic conclusions
The flow rate of water is larger than expected for conventional car fires (water consumption is significantly higher than that of conventional diesel locomotives)
Continuous water flow on the battery can cool down and shorten the fire extinguishing time, but the total water volume will increase
Note: If there is no water
Allowing the battery to burn to self-extinguishing may be an effective option for fire suppression if there is no source of water on the site and there is no threat to human life safety, buildings, vehicles, and it takes longer to monitor and observe any complex In the burning and free-burning test, the battery continues to have a visible flame for about 90 minutes. The battery extinguished by the extinguishing agent may re-ignite. When the high-voltage battery is extinguished, a large amount of water should be used. A small amount of water can release dangerous toxic gases. .
To use these connectors, the ribbon cable is inserted into the Ribbon Connector and the connector is then plugged into the Ribbon Connector on the circuit board. The connectors are designed to provide a secure and reliable connection that can withstand repeated insertions and removals.
Overall, the 2.54mm Ribbon Connectors are an essential component in many electronic devices that require a reliable and secure connection between the ribbon cable and the circuit board.
2.54Mm Ribbon Connector,Pressure Welding Bar Connector,Pressure Welding Bar Connectors,Welding Bar Connector
YUEQING WEIMAI ELECTRONICS CO.,LTD , https://www.weimaiconn.com