Blade batteries are widely known for conquering the pinprick test, and the safety factor of power lithium batteries is in turn a major concern. Many consumers want to know more data about the safety of the blade battery. In addition to the needling test, what other tests have the blade battery undergone? What is the main performance? Let's take a look at it.
Squeeze test to ensure personal safety in impact accidents
Extrusion test is an essential key item for the detection of power lithium batteries, which can simulate the impact of the car, the power lithium battery extrusion deformation, the detection of the safety factor of power lithium batteries. National industry standards for extrusion testing standards are more demanding: power lithium battery in the deformation of more than 30%, and within an hour, there can be no fire, explosion.
Extrusion test, the blade battery in the deformation of more than 30% and placed in the whole process of 1 hour no fire, explosion. In the road traffic accident does not explode, not on fire, can ensure that the owner from secondary injury, but also in the maximum protection of the owner's life, property safety, which is also BYD Auto for the safety requirements of the power lithium battery.
Furnace temperature test to test the high temperature safety barrier of power lithium battery
Furnace temperature test, also known as heating test, is mainly used to test the safety factor of the power lithium battery under high temperature conditions. The national standard standard with continuous heating of the power lithium battery to 130 ° C, and maintain the temperature for 30 minutes, in this time, the power lithium battery can not produce a fire, an explosion.
Blade battery using lithium iron phosphate materials, high temperature performance indicators more outstanding. Furnace temperature test, the blade battery in more than two times the national industry standard temperature, more than 300 ° high temperature to maintain 30 minutes, during which there is no fire or explosion and other situations. When encountered in the parking lot neighboring vehicles on fire and other situations, the blade battery super high temperature resistance performance indicators, so that new energy vehicles in the high temperature environment to ensure maximum battery safety.
Over-charging detection special battery charging system to prevent abnormalities
Overcharging is one of the main culprits of new energy vehicle fire accidents. Because of the battery charging system failure, the battery continues to be charged when fully charged, thus causing overcharging and thus causing new energy vehicles to catch fire.
The stronger the power lithium battery's ability to prevent overcharging, the lower the chance of the vehicle catching fire. Overcharge detection can simulate the battery overcharge situation and test the battery's ability to prevent thermal runaway. The national standard standard to 1 times the current constant current battery charging to 1.5 times the termination voltage to terminate the battery charging, and the observation of 1 hour shall not appear on fire, the occurrence of explosions.
In the overcharge test, BYD Auto Blade battery charging to 1 times the current battery charge to 2.6 times the termination voltage to terminate battery charging, and in the 1-hour observation period there is no fire, explosion and other situations. With a higher standard of overcharge prevention to reduce the chance of fire caused by overcharging, the blade battery makes the safety factor of new energy vehicles to a higher level.
Mandatory thermal runaway of the battery cell whole pack still sits untouched
Thermal runaway is the fuse that causes the fire of the power lithium battery. In order to better test the safety factor of the blade battery under thermal runaway condition, BYD conducts mandatory thermal runaway testing on the blade battery, which artificially causes thermal runaway of some battery cells in the pack and observes the safety factor of the whole pack.
The mandatory thermal runaway of the battery cell, with the mutual cooperation of the blade battery self-insulation and flame retardant system, did not lead to the thermal runaway of the adjacent battery cell. The maximum temperature of the adjacent cell is 80°C, which still does not exceed the temperature conditions for thermal runaway of lithium iron phosphate batteries. The thermal runaway of a single cell did not cause a chain reaction of adjacent cells, so the safety factor of the whole pack of batteries remains the same.
After thousands of severe tests, the all-round safety coefficient of the blade battery has been tested in many aspects, and the true safety of new energy vehicles will be given to the majority of consumers. The emergence of the blade battery makes the performance advantages of new energy vehicles more and more obvious, replacing fuel cars and promoting green travel will become an irreversible historical trend.
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