1.

An industry pivot with legal consequences

At InterBattery 2026, LG Energy Solution, Samsung SDI, and SK On all highlighted ESS, fire-safety technologies, and next-generation battery platforms as the center of their messaging, rather than EV batteries. Reporting in early 2026 also indicates that Korean battery makers are reallocating production and investment toward ESS in response to the EV slowdown, with line conversions and dedicated ESS output now moving from strategy to execution.

This transition matters because ESS products are evaluated differently from automotive batteries. In the ESS context, patent and liability questions increasingly arise at the level of system architecture, fault detection, thermal-event response, and operational lifespan, rather than solely at the level of cell chemistry or charging performance.

2.

U.S. manufacturing realignment raises new FTO questions

This strategic shift is already visible in U.S. manufacturing. Ultium Cells, the General Motors–LG Energy Solution joint venture, announced a $70 million retooling of its Spring Hill, Tennessee facility so that it can begin LFP battery production for ESS in Q2 2026. LG Energy Solution has also stated that the output will support its North American ESS build-out, including U.S.-made enclosures and vertically integrated ESS offerings.

For overseas manufacturers, suppliers, and project-facing businesses, this means FTO analyses should no longer stop at cathode materials or cell design. As ESS manufacturing expands, exposure may arise from pack and enclosure design, thermal-runaway containment, monitoring logic, suppression systems, and the interface between the battery system and higher-level control electronics.

3.

The next patent battleground is likely to be system-level

Recent patent publications associated with Samsung SDI suggest a growing emphasis on ESS-specific safety and control functions, including energy storage apparatuses, fire-extinguishing systems, and system-level architectures designed to respond to abnormal conditions. These filings indicate that competitive value is increasingly being claimed not only with respect to electrochemical performance, but also in relation to event detection, propagation control, and incident mitigation.

That distinction will be important in future disputes. In a grid-scale or containerized ESS installation, liability analysis may turn on whether the system can detect degradation, localize a fault, preserve relevant operating data, and limit escalation after an initiating event. As a result, patents covering “forensic” or defensive system functions may become just as important as patents covering cell composition or energy density.

4.

LMFP is not an open field

Although foundational LFP barriers have narrowed over time, LMFP now appears to be a crowded follow-on patent space rather than a clearly open opportunity. KnowMade’s 2026 LMFP landscape analyzes more than 7,800 patent families, and reports that over 410 new IP players have entered since 2023, with about 80% of those newcomers coming from China. KnowMade also describes a sharp increase in Chinese patenting activity and notes that China has become the dominant center of LMFP patenting and industrial scale-up.

For businesses evaluating market entry, sourcing, licensing, or acquisition opportunities, the practical risk is therefore not limited to core chemistry claims. The denser issues may lie in manganese incorporation strategies, precursor routes, processing conditions, electrode structures, and implementation-specific optimizations that sit around the chemistry, rather than at its historic core.

5.

Enforcement risk is becoming more international

In Europe, the Unified Patent Court is becoming an increasingly important forum for strategic patent enforcement, with 2025–2026 commentary emphasizing its role in cross-border relief and coordinated litigation strategy. In the United States, post-Lashify commentary indicates that the ITC’s domestic-industry requirement may be more accessible in some cases than previously assumed, potentially making Section 337 a more attractive route for patent owners targeting imported ESS-related products.

This does not mean an immediate wave of ESS cases is inevitable, but it does mean that imported ESS assemblies, racks, containers, battery control subsystems, and integrated storage solutions should now be assessed with the same seriousness once reserved for EV cells and packs.

6.

Practical takeaways

Companies active in ESS should widen their patent diligence to include not only cell materials, but also rack-level monitoring, enclosure architecture, propagation barriers, extinguishing systems, and software-assisted safety controls. Supply agreements should also be revisited for indemnity scope, root-cause allocation, evidence access, incident-data retention, and long-tail degradation or safety obligations over the life of the project.

For cross-border matters, portfolio review should be aligned with likely enforcement venues. That means tracking LMFP follow-on rights, identifying system-level patents with import leverage, and evaluating whether a future dispute would be better framed as a chemistry case, a control-system case, or a containerized ESS architecture case.