NIO's in-house-developed 46105 large cylindrical battery is about to enter small-scale pilot production. Most likely, the first batch of 46105 cells will be intended for the 120 kWh battery pack. EVE Energy or Gotion High-Tech could be the companies responsible for mass production.
Last year, NIO's major shareholder CYVN acquired McLaren Automotive and subsequently merged it with Forseven, a British luxury EV startup. In 2024, Forseven signed a technology licensing agreement with NIO, allowing it to use NIO's vehicle platforms and technologies for new vehicle development in exchange for a licensing fee. Put simply, NIO now has the financial resources to move forward with its own large cylindrical battery development.
Last year, NIO's 4680 battery developed for McLaren had already reached the A-sample stage. At the time, there were reports that EVE Energy might be responsible for mass production. So it wouldn't be surprising if EVE Energy were selected for the 46105 large cylindrical battery this time around.
Why is NIO developing large cylindrical batteries?
As we all know, an EV battery pack consists of rows of individual cells (essentially small batteries). In the 46105 large cylindrical cell, "46" represents its diameter of 46 mm, while "105" represents its height of 105 mm. The planned energy density is 292 Wh/kg. Higher energy density at the cell level helps optimize cell placement within the limited space of a battery pack, increasing the pack's overall capacity.
Compared with conventional cylindrical batteries, large cylindrical cells offer lower internal resistance and a simpler longitudinal current path. Meanwhile, batteries featuring an all-tab design can better overcome the traditional trade-off between high energy density and high safety performance compared with conventional single-tab cells. This also paves the way for high-rate fast charging.
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