Battery pack box body and battery pack

By designing guide channels and varying the flow cross-sectional area of ​​the flow channels in the battery pack housing, as well as differentiating the contact areas of the three types of barrier components, the problem of uneven heat exchange in the battery pack was solved, achieving uniform cooling of the battery pack and extending its service life.

CN224232734UActive Publication Date: 2026-05-12ZHEJIANG LEAPENERGY TECH CO LTD +1
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Patent Information

Application Number
CN202520937595.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2026-05-12
Estimated Expiration
2035-05-13

AI Technical Summary

Technical Problem

Uneven heat exchange in the battery pack affects its lifespan.

Method used

Design a battery pack housing including a guide channel and a channel opening. The flow cross-sectional area of ​​the guide channel near the channel opening is smaller than that far from the channel opening. The channel opening is connected to the guide channel. By designing a stepped increasing or decreasing flow cross-sectional area, the heat exchange medium flow rate is ensured to be uniform. Combined with the different contact area designs of three types of barrier components, the heat exchange effect of the battery cell is optimized.

Benefits of technology

It achieves uniform heat exchange in the battery pack, extends its service life, improves the cooling uniformity of the battery pack, and reduces the temperature difference between the cells.

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Abstract

The utility model relates to a battery pack box body and a battery pack, the battery pack box body is provided with a guide flow channel and a flow channel opening, the flow channel opening is communicated with the guide flow channel, the guide flow channel is used for defining a guide direction allowing a heat exchange working medium to pass through, and the flow channel opening is used for allowing the heat exchange working medium to pass through in the guide direction; and the through-flow sectional area of the guide runner close to the runner opening is smaller than that of the guide runner far away from the runner opening. According to the technical scheme, the through-flow sectional area, close to the flow channel opening, of the guide flow channel is smaller than the through-flow sectional area, away from the flow channel opening, of the guide flow channel, so that the flow of the heat exchange working medium, close to the flow channel opening, of the guide flow channel and the flow of the heat exchange working medium away from the flow channel opening tend to be uniform; therefore, the heat exchange working medium with uniform flow can exchange heat with the battery cells of the battery pack at different positions, the heat exchange uniformity of the battery cells at each position of the battery pack is improved, the phenomenon of non-uniform heat exchange of the battery pack is improved, and the service life of the battery pack is prolonged.
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