Blade battery — what the name describes

A conventional pack is built in three stages: cells go into modules, modules go into a case. The Blade design removes the middle stage. The cells are drawn out into long strips that span most of the width of the pack, and those strips act as structural members of the case itself.

Why it matters when buying

Removing the modules recovers volume, and recovering volume is how an LFP pack — a chemistry with lower energy density — ends up competitive on range with a nickel-based one. The structural role of the cells also stiffens the floor of the car, which is why manufacturers using this approach quote body rigidity figures alongside battery figures.

The safety argument that surrounds the name comes from a nail penetration demonstration BYD publicised widely. The claim worth taking seriously is narrower than the marketing: iron phosphate chemistry has a higher thermal runaway threshold than nickel chemistry, and the flat format gives heat more surface to escape through. That is a real property of the design rather than a brand attribute.

The trade-off is repairability. A pack whose cells carry structural load is harder to open and repair at cell level, so damage assessment after an accident tends to be pack-level. That matters for insurance more than for daily use, and it is worth asking the importer how pack damage is handled before purchase.

Related: LFP · cell-to-pack · cell-to-body