Energy storage device

By strategically positioning the case and cell fume valves within the housing case and cell, the power storage device enhances smoke exhaust efficiency and reduces heat exposure to battery cells, improving safety and performance.

JP2026102968APending Publication Date: 2026-06-23TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TOYOTA JIDOSHA KK
Filing Date
2026-04-03
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The challenge in battery packs is that when a smoke exhaust valve is positioned on the side surface of a battery cell, the distance between the valve and the exhaust duct above the battery pack increases, leading to reduced smoke exhaust efficiency.

Method used

The power storage device is designed with a housing case that includes a case fume valve located above or below the center of the housing case, and a cell fume valve positioned above or below the center of the power storage cell, optimizing the exhaust path and reducing contact area with high-temperature gas.

Benefits of technology

This configuration improves smoke exhaust efficiency by shortening the exhaust path and minimizing contact between high-temperature gas and the battery cells, while also using a cooler to quickly cool the discharged gas and protect the cells from heat damage.

✦ Generated by Eureka AI based on patent content.

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  • Figure 2026102968000001_ABST
    Figure 2026102968000001_ABST
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Abstract

In an energy storage device that houses energy storage cells, the cell exhaust valve is installed on the side of the energy storage cell to improve exhaust efficiency. [Solution] The energy storage device 1 comprises a plurality of energy storage cells 10 and a housing case 20. Each of the plurality of energy storage cells 10 includes a cell exhaust valve provided on the side of the energy storage cell 10 for exhausting gas from within the energy storage cell 10. The housing case 20 includes a lower case 22, an upper case 21, and a case exhaust valve 23. The case exhaust valve 23 is located above or below the center of the housing case 20 in the vertical direction. If the case exhaust valve 23 is located above the center of the housing case 20, the cell exhaust valve is located above the center of the energy storage cell 10 in the vertical direction. If the case exhaust valve 23 is located below the center of the housing case 20, the cell exhaust valve is located below the center of the energy storage cell 10 in the vertical direction.
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