A battery box and a battery pack

By using a U-shaped groove structure and threaded connection in the battery box to connect the structural beam and the outer frame, the problem of welding dissimilar materials was solved, achieving a low-cost and high-strength battery box design and optimizing the economy of the battery pack.

CN224384401UActive Publication Date: 2026-06-19CALB GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CALB GROUP CO LTD
Filing Date
2025-06-11
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Existing battery casings suffer from interfacial reactions that generate brittle phases during dissimilar material welding, resulting in insufficient joint ductility and impact toughness. Furthermore, thermal stress generated under temperature differences affects connection strength and fatigue performance, making it difficult to achieve the goal of cost reduction.

⚗Method used

The installation structure using a U-shaped groove connects the structural beams and outer frame, and is fixed using threaded connections and structural adhesives, overcoming the challenge of welding dissimilar material interfaces and enabling the use of low-cost metal materials.

🎯Benefits of technology

The problem of welding dissimilar materials was solved, meeting the cost reduction requirements of the battery box while ensuring rigidity and strength, thus optimizing the overall manufacturing cost of the battery pack.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model belongs to the field of battery technology and discloses a battery box and a battery pack. The battery box includes an outer frame, a mounting structure, and structural beams. The mounting structure is mounted on the outer frame and has U-shaped grooves. The ends of the structural beams are respectively positioned in two U-shaped grooves and connected to the mounting structure. In this utility model, the mounting structure connects the structural beams and the outer frame, overcoming the limitation of using dissimilar materials for the structural beams and outer frame. During battery production, provided the rigidity and strength requirements are met, low-cost metal materials can be used, thus satisfying the cost reduction needs of the battery box.
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