BYD's Blade Battery was officially released in March 2020, proving that it will not catch fire or explode when punctured by a needle. Now it is March 2021, marking the first anniversary of the Blade Battery's launch.
Throughout the year, battery companies have been committed to battery safety, and various battery technologies have made continuous progress. To date, even ternary lithium battery systems are not afraid of needle penetration.
The blade battery uses lithium iron phosphate material, which already possesses safety advantages. So, which ternary lithium batteries have made significant progress in terms of safety?
On March 17, Voyah Automobile held an online technical sharing session to provide a comprehensive explanation of the ternary lithium battery pack used in its first mass-produced model, the Voyah Free.
Voyah Automobile states that its FREE battery pack has three main advantages: a pioneering "three-dimensional heat insulation wall" technology, a unique battery safety monitoring and early warning model in its BMS system, and a high-safety battery pack solution. With these three cutting-edge technologies, the new battery pack will not smoke, catch fire, or explode after thermal runaway is triggered and a thermal event alarm signal is issued.
On March 10th, GAC Aion released its new generation of power battery safety technology – the magazine battery system safety technology. Based on the design concept of "preventing short circuits within the battery cell, preventing thermal runaway after a short circuit, and preventing the spread of heat after thermal runaway", the magazine battery adopts a safety-cabin-like design, which can effectively block the spread of thermal runaway cells. When abnormalities are detected in the cell voltage or temperature, the battery rapid cooling system is automatically activated to cool the battery.
GAC Aion also released a test video from the China Automotive Technology and Research Center, showing a needle penetration thermal propagation test on a ternary lithium battery pack equipped with the magazine battery system safety technology. The test results showed that, five minutes after the thermal accident signal was issued during the test, the magazine battery pack only emitted smoke briefly, without any fire or explosion.
It is understood that the battery cells for GAC Aion are supplied by CALB and are ternary lithium batteries.
In December 2020, SVOLT Energy unveiled its thermal runaway system solution, Cold Bee, at its Battery Day event. Cold Bee completely solves the thermal runaway problem of battery systems through original technologies at four levels: materials, cells, battery packs, and monitoring systems.
Sunwoda also announced the successful development of a battery pack that "only smokes and does not catch fire" and can pass the "heat-triggered cell thermal runaway test". That is, after a single cell is triggered to cause thermal runaway, the entire battery pack only smokes and does not catch fire.
CATL stated in October 2020 that it had developed a ternary battery that "only smokes and does not catch fire". Through high-safety electrolyte and thermal expansion isolation technology, it directly addresses the pain points of high energy density and high safety, ensuring that the battery pack does not burn. Even if one cell catches fire, the entire battery pack will only smoke.
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Advances in various technologies are jointly promoting the further development of new energy vehicles, which will help them replace gasoline vehicles as soon as possible!
