Battery box body

The battery box design using aluminum extrusion profiles and bolt connections solves the shortcomings of the battery system in terms of strength and integration, and achieves efficient improvement in mechanical properties and increase in energy density.

CN223347886UActive Publication Date: 2025-09-16中汽新能(天津)电池科技有限公司
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Patent Information

Application Number
CN202422585936.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-25
Publication Date
2025-09-16
Estimated Expiration
2034-10-25

AI Technical Summary

Technical Problem

Existing battery systems are insufficient in meeting higher strength requirements and energy density, especially in the stacking and connection methods of battery modules, resulting in a complex overall structure, heavy weight and low integration.

Method used

The left side panel, right side panel, front panel, rear panel and mid-bottom panel made of aluminum extrusion profiles are welded to form the lower box body, and form a stable quadrilateral structure with the second layer of liquid cooling plate. Combined with bolt connection and thermal conductive structural adhesive, the module is stably fixed and the force is evenly distributed.

Benefits of technology

The overall integration and energy density of the battery pack are improved, the mechanical strength is enhanced, the vibration and impact resistance are improved, the modal frequency is increased to above 60Hz, and the processing cost and weight are reduced.

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Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a battery box body which comprises an upper-layer box body, a lower-layer box body, an upper-layer module and a lower-layer module, the upper-layer module and the lower-layer module are respectively arranged in the upper-layer box body and the lower-layer box body, and the lower-layer box body comprises a left side plate, a right side plate, a front panel, a rear panel, a middle bottom plate and a two-layer liquid cooling bottom plate. The left side plate, the right side plate, the front panel, the rear panel and the middle bottom plate are welded to form a lower-layer box body, the two-layer liquid cooling plate is located on the upper portion of the lower-layer box body and connected with the upper portion of the left side plate and the upper portion of the right side plate through bolts, and the upper-layer module is installed on the two-layer liquid cooling plate. According to the technical scheme, the overall integration degree is high, the number of parts is small, machining is easy, the machining amount is reduced, and the machining cost is reduced.
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