BAK Battery is ready with its 4680 battery cell

28 March 2021, 13:29:12

BAK Battery is ready with its 4680 battery cellChinese media have reported that BAK, one of China's largest batteries producer, is ready to produce a 4680 cylindrical battery cell. During the China International Battery Technology Exhibition (CIBF 2021) in Shenzhen, Li Dan, vice president of BAK Battery, revealed that the 4 series (46mm diameter battery cell products) is currently mainly customized, that is, joint development is the mainstay. It will be mass-produced by the end of next year, and it can be customized in the second half of this year. Of customers send samples. As far as the industry is concerned, BAK believes that the industry's mass production of large cylindrical batteries is expected to start in 2023 and will be used in electric cars.

BAK said that its large cylinder battery program was developed very early and was promoted to customers before Tesla Battery Day. "From the second half of 2019 to the first half of 2020, we have been promoting this technology with overseas high-end customers before the Tesla battery came out. We have done 26 and 32 before, and the height is also from 70 to 140. We have all tried after Tesla announced this thing, all these customers had a deeper understanding of us. Tesla led us to a more likely popular size, the diameter of 46. Tesla's addition has done a good endorsement of this technology." Fan Wenguang, the head of BAK battery cell research and development, said.

Lin Jian, chief scientist of BAK Battery, said that because we realize that the cylinder has to compete with the square, it is impossible not to follow the all-pole route. The square has a long cruising, long life, and low impedance. It is because it is an all-pole. If a cylinder wants to compete with a square, it has to have full pole ears.

In Lin Jian's view, the cylindrical battery can match the square shape in terms of power density and fast charge and fast discharge capabilities. In terms of safety, the cylindrical directional blasting ability is incomparable to that of a square. "Compared with the big square, the safety of the cylinder is the biggest advantage when the energy density and power density are similar." Lin Jian said.

It is understood that the 4680 of BAK battery is currently calibrated to 25Ah, far exceeding the 3Ah of 18650 battery. Source

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