The encyclopedia · Engineering & Operations · Technical decision · 2020–2024
BYD's blade battery skipped the module and packed LFP cells straight into the frame
Instead of fighting LFP's energy-density gap with chemistry, BYD removed the module step and put blade cells straight into the pack — 50% more space, no fire.
BYD
the move
BYD launched the Blade Battery in March 2020, saying it wanted to bring battery safety back to the forefront after the industry's single-minded pursuit of energy density. Chairman Wang Chuanfu framed it as redefining the industry's safety standards.
The invention is a process and structure breakthrough: cells shaped like blades are packed directly into the pack, skipping the module. Space utilization rises by over 50% versus conventional LFP block batteries, giving LFP — long criticized for low energy density — a competitive package.
In nail-penetration tests the Blade Battery emitted no smoke or fire and stayed at 30–60°C, while a ternary lithium cell exceeded 500°C and burned; crush, bending, 300°C furnace and 260% overcharge tests also passed. The Han EV, launched June 2020 with a 605 km range, was the first car to carry it.
Korean trade press later described the pack as breaking LFP's energy-density limits through manufacturing-process innovation rather than chemistry.
why it works
- Dropping the module removes weight and wasted volume at pack level.
- LFP's thermal stability makes the extreme-safety story credible.
- The test results are visual and dramatic — a nail through the pack.
- Cell-to-pack simplifies the factory, a genuine process innovation.
what transfers
Before swapping materials, question the assembly steps: removing an intermediate component can buy more performance than a new chemistry — while making the product safer.
what came after
Blade Battery-equipped EVs launched from June 2020, BYD said it would share the technology with partners, and by 2024 the pack had run through several generations while Korean media still cited it as the example of LFP limits broken by process rather than chemistry.
references
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