In this dataset, it's a patent family whose title or abstract references a bidirectional DC-DC converter (or the broader DC-DC converter term) and whose claims or description address thermal management, power module cooling, heat sink design, or liquid cooling. The search further restricts to IPC classes covering power conversion circuitry, electronic packaging, and semiconductor thermal design, so a converter patent with no cooling-specific language would not qualify. This combination is deliberately narrow: it captures the overlap of converter topology and thermal engineering rather than either field alone.

The dataset's assignee ranking is concentrated among a mix of specialist power-electronics firms and larger OEMs, with the momentum data showing almost no latest-year filing activity across tracked names. Only one assignee shows any latest-year filing, and it is flat year-over-year rather than growing. This pattern is consistent with a field that peaked in filing volume around 2024 and has since cooled, so current leadership is better read from cumulative family counts than from recent momentum alone.

The trend data shows a rise from a single filing in 2017 to a peak of 11 in 2024, with a flat midpoint of just 2 filings in 2022 — meaning the growth was concentrated in a short window rather than gradual. This kind of pattern often reflects a specific technology inflection, such as wider adoption of bidirectional converters in EV charging or grid-storage applications, prompting a cluster of filings around the same time. The apparent drop-off after 2024 should be read cautiously, since publication lags filing by roughly 18 months and recent years are structurally undercounted.

The IPC composition shows heavy density in power conversion (H02M) and packaging (H05K), but comparatively thin coverage in classes tied to EV propulsion (B60L), semiconductor devices (H01L), batteries (H01M), and inductors/transformers (H01F). That thinner coverage suggests under-claimed territory at the intersection of converter cooling and vehicle-level integration, die-level thermal spreading, or cell-adjacent cooling loops. A first claim in these areas would likely combine an existing bidirectional converter topology with a cooling structure specific to one of these adjacent domains, rather than restating core power-conversion circuitry.

Ownership is not highly concentrated in the sense of joint filing — the dataset records only two co-assignee pairs across 66 families, meaning the overwhelming majority of patents were filed by a single assignee acting alone. Geographically, filing is spread across Europe, the US, and China at broadly similar levels, with India, Japan, and Canada trailing. This combination — many independent filers, no dominant collaborative cluster, and distributed geography — points to a field still open to new entrants rather than locked up by a small alliance of players.