Energy storage module and manufacturing method thereof

By varying electrode opposing widths based on temperature regions, the energy storage module addresses unequal high-rate resistance and improves volumetric energy density and fuel efficiency, reducing the need for additional confinement members.

JP7763208B2Active Publication Date: 2025-10-31PRIME PLANET ENERGY & SOLUTIONS INC
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Patent Information

Application Number
JP2023064314
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-04-11
Publication Date
2025-10-31
Estimated Expiration
2043-04-11

AI Technical Summary

Technical Problem

Existing energy storage modules face challenges in equalizing high-rate resistance among multiple power storage devices due to uniform confinement pressures, leading to increased weight and reduced volumetric energy density, particularly when installed in moving objects like vehicles.

Method used

The energy storage module is designed with varying electrode opposing widths for different temperature regions, arranging energy storage devices with narrower widths in low-temperature areas and wider widths in high-temperature areas, allowing flexible adjustment of high-rate resistance without the need for a 'cell group framework.

Benefits of technology

This design enhances high-rate resistance equality, improves volumetric energy density, and increases fuel efficiency by reducing the number of restraining members and parts, while minimizing performance degradation.

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Abstract

To provide a power storage module with a novel structure, in which the high-rate durability of a plurality of power storage devices can be leveled.SOLUTION: A power storage module 500 disclosed here includes a plurality of power storage devices 100. The power storage module 500 includes a low-temperature region A1 with relatively low temperature and a high-temperature region A2 with relatively high temperature when the power storage devices 100 are charged and discharged. A first power storage device 110 disposed in the low-temperature region A1 among the power storage devices 100 has a narrower electrode facing width than a second power storage device 120 disposed in the high-temperature region A2.SELECTED DRAWING: Figure 5
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