A welding process method and device for a power battery cell

A power battery and welding device technology, applied in the direction of feeding devices, welding equipment, positioning devices, etc., can solve the problems of difficult positioning and uneven position distribution, and achieve the effects of improving production efficiency, controlling safety risks, and reducing costs
CN107009026BActive Publication Date: 2019-03-12CHINA FIRST AUTOMOBILE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA FIRST AUTOMOBILE
Publication Date
2019-03-12

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Abstract

The invention discloses a welding process method for a power battery cell, which includes battery cell assembly, tab bending and bonding and pressing, double-side laser welding, and electrical connection sheet bending and positioning. The invention also discloses a welding device for a power battery unit, which includes a cover plate, a clamping fixture, a lug pressure plate, a lug bending fixture, a rotary welding fixture, and an electrical connecting piece bending fixture. In the present invention, the whole welding process is a semi-automatic operation, which is completed by operating the button to control the hydraulic drive mechanism. The precise cooperation between them ultimately guarantees the quality of single laser welding and process consistency, and can effectively improve production efficiency, control safety risks and reduce costs in the process of small-batch production or trial production of battery modules.
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Description

Technical field

[0001] The invention belongs to the technical field of laser welding process design and welding fixture design for power battery monomers, and specifically relates to a welding process method and device for small batch production or trial production of soft pack power battery modules. Background technique

[0002] The current mainstream power battery cell types are divided into soft packs, square hard shells and cylinders. Among them, the square hard shell batteries and cylindrical batteries have sufficient strength and structural strength and are easy to fix, and only need to add electrical connections for welding or screwing. To realize the series and parallel connection between the cells, it is relatively easy to realize. The soft package monomer is limited by factors such as difficult positioning due to shape and structure, soft and outward extension of the positive and negative poles, and uneven position distribution. In terms of welding method, welding proce...

Claims

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