Power storage device and method for manufacturing the same
By setting linear protrusions on the welding head and anvil and using vibration welding technology to form multiple concave and convex structures for the electrode tabs, the problem of insufficient welding reliability of the electrode tabs is solved, the strength and stability of the welded joint are improved, and the reliability of the battery's conductive connection is enhanced.
CN122158884APending Publication Date: 2026-06-05PRIME PLANET ENERGY & SOLUTIONS INC
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PRIME PLANET ENERGY & SOLUTIONS INC
- Filing Date
- 2025-12-02
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
In the existing technology, the welding reliability of electrode tabs needs to be improved, especially in the process of ultrasonic welding, where the strength and stability of the weld joint are insufficient.
Method used
The electrode tabs are joined by setting linear protrusions on the welding head and anvil, and forming the joint through vibration welding. During the joining process, the linear protrusions abut against the surface of the electrode tabs to form multiple concave and convex structures extending in the same direction to enhance the joint strength.
Benefits of technology
It improves the welding reliability and stability of electrode tabs, enhances the strength and durability of welded joints, and improves the reliability of battery conductive connections.
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Smart Images
Figure CN122158884A_ABST
Abstract
The present application relates to a power storage device and a manufacturing method thereof, the manufacturing method of the power storage device including: a step of producing an electrode body (200) having a first electrode tab group (220); and a step of forming a joining portion in which first electrode tabs (230) in the first electrode tab group (220) are joined to each other by applying vibration to the first electrode tab group (220) in a stacking direction of the first electrode tabs (230) with the first electrode tab group (220) being sandwiched by a horn (10) and an anvil (20) using the horn (10), in one of the horn (10) and the anvil (20), a linear protrusion (11) is provided on a surface that comes into contact with a first outer surface of the first electrode tab group (220), and in the step of forming the joining portion, the vibration is applied in a state in which the linear protrusion (11) comes into contact with the first outer surface of the first electrode tab group (220).
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