Energy storage devices

By embedding comb-shaped current collectors with parallel connections and a specified resistance, the safety of energy storage devices is enhanced by limiting current concentration and heat generation during internal short circuits, addressing the inadequacies of existing designs.

JP7888388B2Active Publication Date: 2026-07-13KK TOYOTA CHUO KENKYUSHO +1
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Patent Information

Application Number
JP2022118036
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-07-25
Publication Date
2026-07-13
Estimated Expiration
2042-07-25

AI Technical Summary

Technical Problem

Existing energy storage devices, particularly those with comb-shaped current collectors, do not adequately address safety concerns during internal short circuits, necessitating further improvements to enhance safety.

Method used

Embedding comb-shaped current collectors within the active material and connecting them in parallel, with a resistance of 0.4Ω or more for each current collector, to suppress current concentration and prevent thermal runaway during internal short circuits.

Benefits of technology

This design enhances safety by limiting current concentration and heat generation during internal short circuits, allowing for greater design flexibility and reduced risk of thermal runaway, even in large electrodes.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To enhance the safety of a power storage device.SOLUTION: An electrode for a power storage device comprises: an electrode active material; a current collecting part with a comb-shaped structure that has a plurality of current collection wires adjacent to the electrode active material, and a connection part to which the current collection wires are parallel-connected. A resistance R of one current collection wire is equal to or more than 0.4 Ω.SELECTED DRAWING: Figure 1
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Citation Information

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  • Metal fluoride compositions for self formed batteries

    US20140117291A1