Method for disassembling power storage device

JP2026019543APending Publication Date: 2026-02-05PRIME PLANET ENERGY & SOLUTIONS INC +1
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Patent Information

Application Number
JP2024121187
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-26
Publication Date
2026-02-05

AI Technical Summary

Technical Problem

Existing methods for disassembling lithium-ion batteries fail to separate the electrode body from the case effectively, leading to potential short circuits and heat generation due to the negative electrode being connected to the case, which can cause large-scale damage.

Method used

A method involving a preparation step to insulate the positive electrode from the case, a separation step to disconnect the negative electrode from the case, and a cutting step to sever the electrical connection, thereby localizing any short circuits and preventing large-scale heat generation.

Benefits of technology

The method allows for efficient separation of the electrode body from the case while minimizing short circuits and heat generation, enabling effective resource recovery of materials like rare earths.

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Abstract

To suppress heat generation due to a short circuit in cutting a case of a power storage device in which a negative electrode is connected to the case.SOLUTION: The method of disassembling power storage device 10 includes a preparation step of preparing power storage device 10 in which positive electrode 30 and negative electrode 40 are accommodated in case 20, negative electrode 40 is electrically connected to case 20, and positive electrode 30 is insulated from case 20, a separation step of separating a portion 41 where case 20 and negative electrode 40 are electrically connected from case 20, and a cutting step of cutting other portions of case 20 after the separation step.SELECTED DRAWING: Figure 4
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Citation Information

Patent Citations

  • Method for recycling lithium-ion battery

    JP2021073375A