New MIG Welding Process Technique for Aluminum Alloy of Electric Vehicle Battery Box

WANG Xiaoyu; SUN Quanwei; YIN Bin; WANG Xin

doi:10.7512/j.issn.1001-2303.2024.06.15

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New MIG Welding Process Technique for Aluminum Alloy of Electric Vehicle Battery Box
Vol. 54, Issue 6, Pages: 94-98(2024)
Published： 25 June 2024 ，
DOI： 10.7512/j.issn.1001-2303.2024.06.15
稿件说明：

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王晓宇，孙全伟，尹斌，等.新能源汽车铝电池盒MIG焊接新工艺［J］.电焊机，2024，54（6）：94-98.

WANG Xiaoyu, SUN Quanwei, YIN Bin, et al.New MIG Welding Process Technique for Aluminum Alloy of Electric Vehicle Battery Box[J].Electric Welding Machine, 2024, 54(6): 94-98.
王晓宇，孙全伟，尹斌，等.新能源汽车铝电池盒MIG焊接新工艺［J］.电焊机，2024，54（6）：94-98. DOI： 10.7512/j.issn.1001-2303.2024.06.15.

WANG Xiaoyu, SUN Quanwei, YIN Bin, et al.New MIG Welding Process Technique for Aluminum Alloy of Electric Vehicle Battery Box[J].Electric Welding Machine, 2024, 54(6): 94-98. DOI： 10.7512/j.issn.1001-2303.2024.06.15.

摘要

在铝合金电池盒实际生产中，由于焊接位置较多、焊接接头板厚差异大，焊接一次合格率很难控制，这就需要研发一种焊接工艺提升铝合金薄厚板焊接的稳定性。目前铝合金电池盒MIG焊接主要是直流脉冲焊接，其中包括直流单脉冲或直流双脉冲焊接。通过分析发现，采用直流+交流摆动同步双脉冲焊接，在相同电流情况下可有效降低焊接热输入，在相同热输入情况下可增加焊缝a值。并在铝合金薄厚板焊接时，可在厚板位置使用直流脉冲，薄板位置使用交流脉冲，保证厚板熔深且薄板不烧穿。摆动同步交直流焊接技术已经在实际生产中得到应用，并有效提高了焊缝合格率和生产效率。

Abstract

The application of aluminum alloy MIG welding technology in the electric vehicle battery box effectively improves the welding efficiency and reduce the cost of production. In the actual production of aluminum alloy battery box

it is difficult to control the rate of one-pass welding because of the many welding positions and the great difference of the thickness of the welding joint plate

it is necessary to develop a welding process to improve the stability of thin and thick aluminum alloy plate welding. The usual MIG welding method for the electric vehicle battery box is DC pulse welding

the welding mode is DC pulse single-current welding or DC pulse double-current welding. Through analysis

the welding heat input can be effectively lower under the same current condition and the welding a value can be increased under the same heat input condition for DC+AC pulse welding weave method. When the thin plate and thick plate for aluminum alloy welding

DC pulse welding can be used in the position of thick plate and AC pulse welding in the position of thin plate. It can ensure deep penetration of thick plate and non-burn-through of thin plate. AC+DC weave welding technology has been applied in actual production

and has effectively improved the pass rate of welding seam and production efficiencyand improve the welding seam acceptance rate.

关键词

铝合金电池盒薄厚板交直流MIG脉冲焊接

Keywords

aluminum alloy of electric vehicle battery boxthin and thick plateDC+AC MIG pulse welding

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