Safety issues of lithium batteries urgently need to be addressed
Against the backdrop of the confirmed trend of replacing traditional fuel vehicles with new energy vehicles, lithium batteries are currently the main power batteries used in electric vehicles due to their advantages such as high energy density, high discharge power, and long cycle life. However, in recent years, safety accidents caused by thermal runaway of lithium batteries have occasionally occurred, posing a threat to the safety of consumers’ lives and property.
In September 2020, Tesla launched the 46800 large cylindrical battery solution. Compared with traditional small cylindrical batteries, large cylindrical battery technology can reduce the number of batteries and corresponding structural components in the battery pack, improve energy density, simplify battery management systems, reduce manufacturing costs, and largely compensate for the disadvantage of cylindrical battery management systems requiring higher requirements than square batteries.
From the current progress, Tesla has achieved self production of 1 million 4680 large cylindrical batteries in January 2022, and the product yield has reached the level of mass production. In September 2022, BMW Group announced the use of 46 series cylindrical batteries in its new models starting from 2025, and locked in the first batch of partners as Ningde Era and Yiwei Lithium Energy. Other well-known battery manufacturers both domestically and internationally are steadily promoting the layout of 4680 large cylindrical batteries
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Post time: Jun-01-2023
