Ultrasonic welding system and battery production system

By setting clearance holes and gap structures in the ultrasonic welding system, the stress concentration problem during electrode welding is solved, the welding quality and system reliability are improved, and the possibility of electrode breakage is reduced.

CN224508688UActive Publication Date: 2026-07-17JIANGSU CONTEMPORARY AMPEREX TECH LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU CONTEMPORARY AMPEREX TECH LTD
Filing Date
2025-05-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the manufacturing of new energy batteries, the mechanical stress in the electrode welding area cannot be evenly distributed during ultrasonic welding, leading to stress concentration, which can easily cause electrode cracking and affect welding quality and safety.

Method used

Design an ultrasonic welding system in which the clearance hole size D of the welding head is set to be greater than or equal to 4mm+D1, and the abutment moves along the first direction during the welding process to avoid stress concentration areas. By setting the first and second gaps, stress is released and the possibility of electrode breakage is reduced.

Benefits of technology

This effectively reduces the breakage of the electrode tabs due to stress concentration, improves welding quality and system reliability, and reduces the mechanical failure rate.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224508688U_ABST
    Figure CN224508688U_ABST
Patent Text Reader

Abstract

The application discloses an ultrasonic welding system and a battery production system. The ultrasonic welding system is used for welding a tab of a battery and comprises a welding clamp and a welding device. The welding clamp comprises an abutting piece configured to be movable along a first direction and used for abutting the tab, and the abutting piece has an avoiding hole. The welding device comprises a welding head having a welding part configured to be movable along the first direction into the avoiding hole and configured to be vibratable along a second direction to weld the tab, along the second direction, two sides of the welding part and inner walls of the avoiding hole form first gaps respectively, the first direction intersects the second direction, along the second direction, a size of the avoiding hole is D, a size of the welding part is D1, and D is greater than or equal to 4mm+D1. The D is set to be greater than or equal to 4mm+D1, so that the tab can release stress generated in the welding, thereby reducing the possibility of the tab being broken due to stress concentration generated in the welding, and improving the welding quality.
Need to check novelty before this filing date? Find Prior Art

Claims

1. An ultrasonic welding system for welding a tab of a battery, the ultrasonic welding system comprising: include: A welding fixture includes an abutment configured to move in a first direction and abut against the electrode tab, the abutment having a clearance hole; A welding apparatus includes a welding head having a welding portion configured to move into a clearance hole along a first direction and configured to vibrate along a second direction to weld the electrode tab. Along the second direction, a first gap is formed between the two sides of the welding portion and the inner wall of the clearance hole. The first direction intersects the second direction. Along the second direction, the size of the clearance hole is D, and the size of the welding portion is D1, where D ≥ 4 mm + D1.

2. The ultrasonic welding system of claim 1, wherein, The size of the first gap is s1, where 2mm ≤ s1 ≤ 10mm.

3. The ultrasonic welding system of claim 2, wherein, 4mm≤s1≤10mm.

4. The ultrasonic welding system of claim 2, wherein, Along the second direction, the size of the tab is d, and D is configured to be less than or equal to d+8mm.

5. The ultrasonic welding system of any of claims 1-4, wherein, Along the third direction, the size of the clearance hole is larger than the size of the welded part. The welded part forms a second gap with the inner wall of the clearance hole on both sides along the third direction. The third direction is perpendicular to the second direction. The plane where the second direction and the third direction are located intersects the first direction.

6. The ultrasonic welding system of claim 5, wherein, Along the third direction, the size of the welded part is H1, and the size of the clearance hole is H, where H≥H1+2mm.

7. The ultrasonic welding system of claim 6, wherein, Along the third direction, the size of the tab is h, and H is configured to be less than or equal to h.

8. The ultrasonic welding system of claim 5, wherein, The size of the second gap is s2, where 1mm ≤ s2 ≤ 5mm.

9. The ultrasonic welding system according to claim 8, characterized in that, 3mm≤s2≤5mm.

10. The ultrasonic welding system according to any one of claims 1-4, characterized in that, The size of the clearance hole along the second direction is greater than the size of the clearance hole along the third direction, and the plane containing the second direction and the third direction intersects the first direction.

11. The ultrasonic welding system of claim 10, wherein, The clearance hole includes two first inner walls and two second inner walls. The two first inner walls are spaced apart along the second direction, and the two second inner walls are spaced apart along the third direction.

12. A battery production system characterized by comprising: Includes the ultrasonic welding system as described in any one of claims 1-11.