Welded body, battery housing, battery and electric device
By employing different welding trajectories—curved and straight—between the cover plate and the housing, the problem of incomplete welding caused by housing deformation was solved, thereby improving the battery's sealing performance and structural stability.
WO2026138995A1PCT designated stage Publication Date: 2026-07-02BYD CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-12-25
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
When the cover plate is welded to the casing, the casing is prone to deformation, which can lead to poor welding and consequently result in poor battery sealing performance.
Method used
Different welding trajectory designs are adopted, including a first welding trajectory that extends in a curve and a second welding trajectory that extends in a straight line. The overlap rate of the welding positions is adjusted to adapt to the structural strength at different positions and avoid deformation caused by heat concentration.
Benefits of technology
It improves the sealing performance of the welding position and the battery casing, reduces the probability of poor welding, and enhances the overall sealing performance and structural stability of the battery.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN2025145813_02072026_PF_FP_ABST
Abstract
A welded body (10a), comprising a first member (100a) and a second member (200a), wherein a welding trajectory (210, 220) is formed at the joint between the first member (100a) and the second member (200a). The welded body does not easily deform, has a low probability of welding voids, and ensures a high welding sealing performance. Further disclosed are a battery housing, a battery and an electric device.
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