In addition, in northern China, due to the very low winter temperatures, new energy vehicles are extremely limited in their promotion due to their unbearable low-temperature batteries, and the low temperature test of the power battery of the Nugget has shown that The charge and discharge capacity of the battery at -40°C can reach more than 60% of the rated capacity, and after 400 charge and discharge at -20°C, the capacity attenuation does not exceed 3%. This means that lithium-ion batteries can also be used on a large scale in extreme temperatures such as in Northeast China and even in space.
According to the R&D personnel of the League, the battery product was mainly renovated from the structural design. First, the laminated cell structure and electrode design were adopted, and the diffusion distance of lithium ions was shortened through high-precision process control. Improve the lithium ion diffusion rate, is conducive to the rapid charge and discharge of the battery; Second, the use of flat flexible packaging battery structure, making the battery temperature difference is minimized, the battery has a larger surface area, more conducive to cooling after warming, reduce the battery heat The risk of losing control is that the battery is safer in operation. In addition, the use of a structure with ears on both sides increases the width of the electrode that draws current from the positive and negative electrodes, and the current distribution is more uniform, making it easier to achieve high power output of the battery.
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