Laser welding method for aluminum alloy shell of automobile power battery

A technology for automotive power batteries and aluminum alloy casings, applied in the field of material processing, can solve problems such as low positioning accuracy, prone to welding deviation, air holes, arc craters, unreasonable selection of laser welding process parameters, etc., and achieve high positioning accuracy, Beautiful shape and strong practicability

Inactive Publication Date: 2018-06-01
SHANGHAI SKEQI AUTOMATION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to many factors such as low positioning accuracy of the battery module tooling fixture before welding and unreasonable selection of laser welding process parameters, quality defects such as welding deviation, air holes, and arc craters are prone to occur after laser welding
[0004] With the continuous improvement of people's requirements for the quality of post-weld forming of automobile power battery shells, it is difficult for pure laser welding to meet the current demand for product quality of battery manufacturers.

Method used

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  • Laser welding method for aluminum alloy shell of automobile power battery
  • Laser welding method for aluminum alloy shell of automobile power battery
  • Laser welding method for aluminum alloy shell of automobile power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, comprises the following steps:

[0023] Step 1, battery module casing material selection and initial positioning;

[0024] Step 2, the robot is equipped with a galvanometer for laser welding.

[0025] Step 1: Material selection and initial positioning of the battery module shell. The clamping process uses a magnetic switch to detect the state of the cylinder and feeds back to the controller 4. The controller 4 controls the cylinder to clamp the corresponding part. The corresponding part refers to the battery The module end plate 5 and the module side plate 6 reach the predetermined position of the tooling fixture respectively. The battery module end plate 5 used: the material is 3 series aluminum alloy, and the size is 149.3mm×16.7mm×94.7mm; the module side plate 6 : The material is 3 series aluminum alloy, the size is 515.2mm×3.0mm×105.4mm, wherein, the butt joint gap between the battery module end plate 5 and the module side plate 6 is less than 0.1mm, ...

Embodiment 2

[0029] Embodiment 2, comprises the following steps:

[0030] Step 1, battery module casing material selection and initial positioning;

[0031] Step 2, industrial vision pre-weld inspection and secondary positioning;

[0032] Step 3, the robot is equipped with a galvanometer for laser welding.

[0033] Step 1: Material selection and initial positioning of the battery module shell. The clamping process uses a magnetic switch to detect the state of the cylinder and feeds back to the controller 4. The controller 4 controls the cylinder to clamp the corresponding part. The corresponding part refers to the battery The module end plate 5 and the module side plate 6 reach the predetermined position of the tooling fixture respectively. The battery module end plate 5 used: the material is 3 series aluminum alloy, and the size is 149.3mm×16.7mm×94.7mm; the module side plate 6 : The material is 3 series aluminum alloy, the size is 515.2mm×3.0mm×105.4mm, wherein, the butt joint gap betw...

Embodiment 3

[0038] Embodiment 3, comprises the following steps:

[0039] Step 1, battery module casing material selection and initial positioning;

[0040] Step 2, industrial vision pre-weld inspection and secondary positioning;

[0041] Step 3, the robot is equipped with a galvanometer for laser welding.

[0042]Step 1: Material selection and initial positioning of the battery module shell. The clamping process uses a magnetic switch to detect the state of the cylinder and feeds back to the controller 4. The controller 4 controls the cylinder to clamp the corresponding part. The corresponding part refers to the battery The module end plate 5 and the module side plate 6 reach the predetermined position of the tooling fixture respectively. The battery module end plate 5 used: the material is 3 series aluminum alloy, and the size is 149.3mm×16.7mm×94.7mm; the module side plate 6 : The material is 3 series aluminum alloy, the size is 515.2mm×3.0mm×105.4mm, wherein, the butt joint gap betwe...

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Abstract

The invention discloses a laser welding method for an aluminum alloy shell of an automobile power battery. According to the technical scheme, a galvanometer, an intelligent camera, a joint, a controller, a module end plate, a module side plate are involved, and the method comprises the steps that 1, battery module shell material selecting and primary positioning are carried out; 2, industrial visual pre-welding detecting and secondary positioning are carried out; and 3, laser welding is carried out by a robot carrying the galvanometer. According to the laser welding method for the aluminum alloy shell of the automobile power battery, the operation steps are simple, the practicability is high, the positioning precision is high, the parameters of the laser welding process are optimized, theperformance of the weld joint is guaranteed to be good, a formed shell is attractive, no defect exists, the requirements of customers are met, and great help is provided for people.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a laser welding method for an aluminum alloy casing of an automobile power battery. Background technique [0002] With the rapid development of new energy technology, power batteries have an unprecedented development trend in the automotive field. Laser welding is mainly applied to the welding of automotive power battery casings. It has the advantages of narrow heat-affected zone, small welding deformation, large weld depth-to-width ratio, flexible welding position, and easy automation. [0003] At present, the pure laser welding method mainly performs welding through the trajectory determined by the pre-welding fixture. Due to many factors such as low positioning accuracy of battery module tooling fixtures before welding and unreasonable selection of laser welding process parameters, quality defects such as welding deviation, pores, and arc craters are prone to occu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/082B23K26/70
CPCB23K26/082B23K26/21B23K26/702
Inventor 许广伟韦志成
Owner SHANGHAI SKEQI AUTOMATION ENG CO LTD
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