BYD’s latest Blade battery shows how advanced EV battery engineering has become, but a recent teardown also highlights a major concern: serviceability. Researchers reportedly spent eight hours dismantling the 1,261-pound pack, using cutting, grinding, hammering and even a deep-freeze cycle to access its internal structure.
A research team recently tore down one of BYD’s newest Blade battery packs and found that taking it apart was far from simple. The process reportedly took around eight hours and required heavy physical work, including cutting, grinding and hammering.
The team also placed the pack in cold storage for 40 hours in an attempt to make some of the adhesive materials more brittle. Even after that, the pack remained difficult to separate into serviceable components.
The Blade battery itself remains one of BYD’s most important technical achievements. Its long and narrow cells are arranged in a tightly packed structure, helping improve packaging efficiency and energy density.
This design can help automakers reduce weight, simplify manufacturing and extract more driving range from a given battery footprint. It also supports the kind of compact battery architecture needed for very high charging performance.
However, the same engineering choices that make the pack efficient can also make it harder to repair. When battery cells, modules and structural elements are integrated tightly together, the pack becomes less like a collection of easily replaceable parts and more like one large bonded system.
One of the biggest challenges during the teardown was the extensive use of structural adhesive. These adhesives help secure battery components, improve crashworthiness and reduce the need for extra fasteners or weight-adding hardware.
According to the source article, the adhesive was found around battery modules, busbars, tabs and even wiring. That made it much harder to separate the parts without damaging them.
Because the team could not safely use heat or chemicals to remove the adhesive, the process became even more complicated. This is where the concern around repairability becomes clear.
If a battery pack is difficult to open and service, even a relatively small fault could become expensive to repair. A damaged module, failed cell or crash-related battery issue may require specialist labor, off-site refurbishment or, in some cases, full pack replacement.
That matters because the battery is one of the most expensive components in an electric vehicle. If packs are treated as sealed structural units, repair costs and insurance costs could rise, especially after accidents.
The issue is not limited to BYD. Many automakers are moving toward more integrated battery pack designs because they can save weight, increase body rigidity and reduce manufacturing complexity. The trade-off is that servicing these packs can become significantly harder.
The teardown team reportedly described BYD’s pack as the hardest battery they had taken apart so far, after working on more than 20 different packs. Beyond repairability, they also raised concerns about recycling at the end of the battery’s usable life.
Battery recycling depends on being able to separate valuable materials efficiently and safely. If packs are heavily bonded with adhesives and difficult to dismantle, recycling could require more time, more energy and more specialized equipment.
The BYD Blade battery teardown points to a wider debate in the electric vehicle industry. Buyers want more range, faster charging and lower prices, while automakers need simpler and cheaper manufacturing methods to deliver those goals.
Highly integrated battery packs can help achieve better efficiency and lower production costs. But as more EVs age, crash, or leave warranty coverage, repairability will become increasingly important.
BYD’s latest Blade battery may be brilliant from a packaging and performance perspective, but the teardown suggests that the industry still needs to balance innovation with long-term service, repair and recycling needs.
