Battery pack and energy storage device

CN224328748UActive Publication Date: 2026-06-05SHANGHAI HONGYING NEW ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI HONGYING NEW ENERGY TECHNOLOGY CO LTD
Filing Date
2025-05-16
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In traditional liquid cooling solutions, the temperature difference between the top and bottom of the battery module is large, resulting in uneven heat dissipation, which can easily generate local hot spots and cause thermal runaway.

Method used

Design a battery pack structure in which the heat exchange tube includes a first heat exchange section and a second heat exchange section. The first heat exchange section corresponds to the high-heat area at the top of the battery module, and the second heat exchange section corresponds to the low-heat area at the bottom. The length of the first heat exchange section is greater than that of the second heat exchange section, forming a fluid passage for the flow of coolant to exchange heat, thereby improving the uniformity of heat exchange efficiency at the top and bottom.

Benefits of technology

By optimizing the design of the heat exchanger tubes, the temperature difference of the battery module along the height direction was reduced, the heat dissipation uniformity was improved, the probability of local hot spots was reduced, and the risk of thermal runaway was reduced.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224328748U_ABST
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Abstract

The utility model discloses a kind of battery pack and energy storage equipment, in battery pack, shell is provided with receiving cavity, liquid inlet and liquid outlet, receiving cavity is used to accommodate immersion liquid;Battery module includes the top of the cell assembly and electrode assembly that is immersed in immersion liquid;Heat exchange pipe includes first heat exchange section and second heat exchange section, first heat exchange section is at least partially with electrode assembly flush, second heat exchange section is at least partially located below electrode assembly, the length of first heat exchange section is greater than the length of second heat exchange section, first heat exchange section and second heat exchange section are communicated to form fluid passage, fluid passage is used to flow cooling liquid.By the above-mentioned mode, the heat exchange efficiency of battery module top is greater than the heat exchange efficiency of battery module bottom, and then reduce the temperature difference between different positions of battery module along height direction, to improve the heat dissipation uniformity of battery module, reduce to generate local hot spot, reduce the probability of thermal runaway.
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