Case Study: Battery Technology Scouting Case Study: Sourcing a Next-Gen Cell

This battery technology scouting case study follows a mid-market energy-storage OEM that had decided its next product generation could not be built entirely in-house. Its lithium-ion packs were competitive today, but the roadmap called for a step-change in energy density and cost within three years — the kind of leap that solid-state, sodium-ion and silicon-anode developers were already filing on. Rather than spend three years and a research budget rediscovering what start-ups and institutes had already invented, the board asked a simpler question: who out there already owns the technology we need, and can we license or partner our way to it? Answering that is what technology scouting does, and this is how the search ran.

The Challenge

The OEM’s problem was not a shortage of ideas but a shortage of time. Its engineers could name a dozen promising directions — sulphide solid electrolytes, sodium-ion for the low-cost tier, silicon-dominant anodes — but had no way to see which of them were already locked up by someone else’s patents, which were still open, and which external developers were far enough along to partner with rather than merely admire. Building any of them from a blank sheet risked spending three years arriving where a start-up already sat, and possibly infringing that start-up’s claims on the way.

The sector context raised the stakes. Battery and electricity-storage patenting has been growing about 14% a year — four times the all-technology average — and the EPO’s Patent Index 2024 recorded battery-technology filings rising a further 24.0% in a single year. When a field is filling that fast, the window to license a technology on favourable terms closes quickly: the developer that is receptive to a partnership this year may have a competing OEM’s term sheet next year. A scouting exercise that takes six months to produce a shortlist can miss the opening it was commissioned to find.

The board wanted three things before it committed R&D headcount: a ranked shortlist of external technologies that actually met the need, evidence that each was available to license or partner rather than tied up exclusively elsewhere, and a read on the freedom-to-operate risk of building in each direction. The mandate was scoped to the product calendar — a fast landscape pass first, then a deeper scorecard and outreach shortlist.

Our Approach

We ran the mandate through our standard technology-scouting method, which moves from a sharp definition of the need to a shortlist a deal team can act on. The work ran in four steps:

• Need-statement definition — the vague brief ‘better cells’ was turned into hard, testable criteria: an energy-density target, a cost-per-kWh ceiling, a cycle-life floor, a manufacturing-compatibility constraint and a time-to-maturity limit. A candidate had to clear all five to make the list.
• Global technology search — the patent record and the scientific literature searched together, across every office, for developers working on each chemistry, with assignee names normalised so a spin-out filing under a founder’s name and a university’s technology-transfer office were not counted as two unrelated players.
• Candidate scorecard — each developer scored on technology fit, patent strength and breadth, maturity (lab, pilot or pre-production), and availability — whether the IP was already exclusively licensed, jointly held or genuinely open to a deal.
• Partner and licence shortlist — the field narrowed to the handful worth a conversation, each with a one-page dossier: what they own, how strong it is, who else is circling, and the realistic route in — licence, joint development or acquisition.

The scouting sat on top of a full battery patent landscape, because a candidate cannot be judged in isolation. A developer with a brilliant sulphide-electrolyte patent is only attractive if the surrounding claim space is not already fenced off by a Panasonic or a Toyota — the incumbents that, with Samsung, LG and Bosch, hold nearly half of all battery patent families filed since 2000. Reading each candidate against the crowding around it is what separates a technology that can be built on from one that will be litigated over.

Availability was assessed as carefully as the technology itself. A start-up’s headline patent means little if it has already granted an exclusive licence for the automotive field of use to a rival, or if its core family is jointly owned with a university that retains march-in or publication rights. So for each shortlisted candidate we traced the ownership and the encumbrances, not just the abstract — the same discipline a buyer would apply in an M&A IP due diligence review, applied early enough to shape which door the OEM chose to knock on.

Finally, we ran a freedom-to-operate screen in the other direction for each shortlisted route. Adopting an external cell technology means inheriting its position in the claim thicket, so before recommending a direction we tested the OEM’s intended product against the densest clusters of live claims in that chemistry. A candidate that scored well on fit but dragged the OEM straight into an incumbent’s claim space was flagged, so the board could weigh the licensing cost of clearing that path against the appeal of the technology.

What the Research Found

The global search returned more than forty external developers working on the three target chemistries — and the first useful finding was how few of them actually cleared the need statement. Roughly half fell out on maturity: genuinely novel lab results with no pilot line and no realistic path to the OEM’s three-year window. Another group fell out on availability, not technology: strong patents already exclusively licensed to a competing carmaker or cell maker for the field of use the OEM cared about. Screening on availability early saved the team from falling in love with a technology it could never have obtained.

The chemistry cuts told their own story. Solid-state candidates clustered around sulphide and oxide electrolytes, but the surrounding claim space was already dense with incumbent filings, so an attractive start-up here came with a heavy freedom-to-operate caveat. Sodium-ion looked very different: the technology is being pushed hardest by Chinese cell makers, and the developers open to a Western OEM partnership were fewer but less encircled by overlapping incumbent claims. Silicon-anode candidates split sharply between a crowded ‘drop-in additive’ group and a thinner, more defensible ‘silicon-dominant’ group worth a closer look.

Five candidates survived every filter. Each held a defensible patent position in its chemistry, sat at pilot or pre-production maturity, and — critically — had IP that was genuinely available for the automotive-storage field of use. Two were venture-backed start-ups open to a licence, two were university spin-outs whose technology-transfer offices were actively seeking an industrial partner, and one was a materials supplier willing to co-develop. The scorecard made the trade-offs explicit: the strongest technology fit was not the easiest deal, and the cleanest freedom-to-operate route was not the highest energy density.

The exercise also surfaced a genuine piece of white space. In one sodium-ion sub-area, filing density was still low enough that the OEM could plausibly file its own claims around a specific electrode-and-electrolyte combination rather than license someone else’s — a ‘build here, buy there’ split that a pure make-or-buy debate would have missed. Scouting is usually framed as a search for what to acquire; done well, it also reveals the corners still open to claim.

The Outcome

The shortlist became the OEM’s external-innovation plan rather than a report filed and forgotten. The board approved outreach to three of the five candidates in parallel — a lead licensing target in silicon-dominant anodes, a sodium-ion spin-out for the low-cost product tier, and the materials supplier for a co-development track — with the scorecard dossiers serving as the opening brief for each conversation. Running three conversations at once, rather than sequentially, preserved the OEM’s leverage: no single developer knew it was the only door being tried.

Two of the routes the search closed off were as valuable as the ones it opened. The team had been an internal champion away from committing headcount to an in-house solid-state programme; the landscape showed that direction was already fenced by incumbent claims and would have demanded a licence anyway, so the OEM redirected that budget toward the cleaner sodium-ion and silicon paths. The white-space finding, meanwhile, seeded a small internal filing programme in the one sodium-ion corner still open — turning the scouting exercise into both a buy decision and a build decision.

Twelve weeks after the need statement was signed off, the OEM had what it had asked for: a ranked, evidenced shortlist, three live partnership conversations, and a clear-eyed view of which directions to abandon. The cost of the scouting was a fraction of the research spend it redirected, and a smaller fraction still of what an infringement suit on a blind in-house programme would have cost.

The timing of the search was part of what it protected. Because the availability and encumbrance work ran up front, the OEM approached each developer before a competitor had locked up the automotive field of use — the difference, in a field filing 24% more patents year on year, between a partnership on the OEM’s terms and a bidding war on someone else’s.

What This Means for Similar Matters

The lesson that generalises is that in a fast-filing field, the make-or-buy decision is really a ‘who-already-owns-this’ decision. An OEM can spend three years building a technology only to find a start-up filed on it first; the cheaper first move is to read the patent record and see what already exists, who holds it, and whether it can be licensed. Technology scouting is that first move made rigorous — a structured search rather than a series of conference-corridor conversations.

The second lesson is that availability has to be screened as early as technology fit. The most exciting candidate is worthless if its IP is already exclusively licensed for your field of use, and that fact is knowable from the recorded record before a single meeting. Filtering on availability up front is what stops a scouting exercise from producing a wish-list the client can never obtain.

The third lesson is that good scouting reveals build opportunities, not just buy targets. Reading the landscape closely enough to shortlist licensees also exposes the white space still open to the client’s own filings — the corners no incumbent has reached. A scouting report that only ever points outward misses half of what the same search can see.

Taken together, this battery technology scouting case study makes a single point that travels to any R&D-driven sector: the external innovation you need probably already exists, and the fastest, cheapest way to reach it is to find out who owns it before you try to reinvent it. Everything the search produced — the ranked shortlist, the availability filter, the white-space finding — existed to turn a vague ‘we should partner more’ into a specific, evidenced list of doors worth knocking on. That is the discipline a battery technology scouting case study is meant to demonstrate, and the reason the work belongs at the front of a product roadmap rather than as a footnote to it.

Data Sources

The market and patent data referenced above comes from:

• EPO–IEA — Innovation in Batteries and Electricity Storage — Joint EPO/IEA study: battery patenting grew ~14% a year (2005–18), four times the all-field average, with the top-25 applicants holding 47% of families since 2000.
• EPO Patent Index 2024 — European filing data recording battery-technology applications up 24.0% year on year and electrical machinery/energy up 8.9%.
• WIPO World Intellectual Property Indicators 2025 — Patents highlights — Record 3.7M global patent applications in 2024, the backdrop of filing density a scouting search reads against.
• Espacenet — worldwide patent search — The EPO's free access to 150+ million patent documents used to identify and normalise external developers by chemistry.

Discuss a Similar Matter

If you are weighing whether to build or license a next-generation technology, we can define the need, search the global record and hand you a shortlist of who already owns it.

Related PerspireIP work: Technology Scouting · Battery Patent Landscape · Patent White Space Analysis.

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