EV battery circularity begins with smart design

Circularity has become a major talking point in the EV debate. Much of the focus has been on recycling, but recycling alone won’t unlock the full environmental value of EV batteries.

To achieve true circularity, the priority must be maximising battery longevity through repair and remanufacturing, with recycling reserved as a last resort. That journey begins with how batteries are designed.

What does true EV circularity look like?

Manufacturers have a duty to consider the full lifecycle impact of EV batteries. Recycling does recover some value, but with a higher environmental cost. Whether through repairing the original pack or harvesting healthy modules to restore other packs, it is much better to keep these components in use for as long as possible. Premature recycling throws away this potential, undermining the very environmental case on which EVs are founded.

The waste hierarchy framework makes this clear: prevention is better than recycling. For EV batteries, prevention means designing for repairability, ensuring packs can be kept in service for as long as possible before they are repurposed or recycled. Only once every avenue to extend life has been exhausted should recycling enter the conversation.

Advanced cell-level testing, such as Autocraft’s OptEVizer® methodology, shows that many so-called “failed” packs still contain large numbers of healthy modules. The problem is that some designs make these modules virtually impossible to recover safely or viably. If the industry is serious about circularity, repairability has to be designed in from the start.
Design holds the key to long-term sustainability

With the right design, faults can be isolated and faulty modules replaced with healthy ones to restore performance. Autocraft’s REVIVE® process can repeat this throughout the battery lifecycle, extending usable life and delaying the need for recycling.

The obstacle is foresight. Many early EV batteries were built on the assumption that failures would be rare, so repairability was not prioritised. In reality, faults do occur, even if at low rates, and when they do, the reputational, financial, and environmental costs of premature failure are significant.

OEMs are under pressure on multiple fronts: warranty claims, consumer trust, and net-zero commitments. A battery that fails prematurely undermines all three. Repair-first thinking allows manufacturers to meet warranty obligations with a fraction of the cost and environmental footprint of replacement, while giving customers confidence that their vehicles will remain reliable long after the warranty has expired.

What does smart battery design look like?

At its core, smart battery design means ensuring components can be taken apart during the repair process, so faults can be isolated and fixed at a modular or even cellular level.

One practical way OEMs can support this is by designing packs that can be unscrewed, rather than glued together or secured with plastic clips, both of which make safe extraction difficult. Modularity is key: the easier it is to remove and replace failing components, the more viable repair becomes.

We’ve worked with automotive manufacturers for many years on design for remanufacture in ICE engines, helping them remove barriers to repair and recovery of key components. The same principle applies to EV batteries. Because we see first-hand where issues occur in the field, we can anticipate the kinds of faults likely to arise and proactively guide manufacturers on how to design around them. This foresight helps make future repairs safer, faster and repeatable at scale.

Ultimately, OEMs may need to invest in more advanced designs, higher-quality materials and smarter production methods to reduce costs and risks over the vehicle lifetime.

The cornerstone of circularity

EV batteries will always degrade over time. Repair and remanufacture cannot reverse calendar ageing or restore a pack to “brand new,” but they can rectify faults and reverse the effects of cyclical ageing, keeping batteries performing at the required level for much longer.

For this to be possible, batteries must be designed with repairability in mind. EV technology is still in its relative infancy, and like any emerging technology, there are teething problems that will improve over time. In the meantime, manufacturers need to factor in the risk of faults and design packs so they can be repaired safely and effectively. Without this foresight, the only fallback is costly and wasteful replacement.

By working with repair specialists early in the design phase, OEMs can create batteries that are easier to service and remanufacture. This reduces economic and environmental costs, while keeping valuable components in circulation for longer. Ultimately, smart design is the cornerstone of battery circularity, ensuring EVs deliver on their sustainability promise throughout their entire lifecycle.