Title:
TAB WELDING METHOD, WELDING TOOL, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/083011
Kind Code:
A1
Abstract:
A tab welding method, comprising: first, using a toothed welding head to perform first welding on a positive tab and a negative tab which are provided in a stacked manner, so as to form a tab body (30) having a first welding mark region (31), so that the positive tab and negative tab which are provided in a stacked manner are in solid-phase connection; then using a toothless welding head (40) to perform flat welding to form a second welding mark region (32), so as to shape and flatten an uneven region formed after the first welding. Also provided are a battery cell prepared by means of the tab welding method, a battery having the battery cell, and an electric device having the battery. By means of the method, gaps between multiple stacked tabs can be eliminated.
Inventors:
LIN CHUANDONG (CN)
LIN JIANG (CN)
XUE FEI (CN)
LIN JIANG (CN)
XUE FEI (CN)
Application Number:
PCT/CN2022/127902
Publication Date:
May 19, 2023
Filing Date:
October 27, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
B23K20/10; B23K28/02; H01M4/139; H01M10/058; H01M50/536; H01M50/538
Domestic Patent References:
| WO2013105361A1 | 2013-07-18 |
Foreign References:
| CN111554960A | 2020-08-18 | |||
| CN112453735A | 2021-03-09 | |||
| CN113042874A | 2021-06-29 | |||
| CN104396050A | 2015-03-04 | |||
| CN111867775A | 2020-10-30 | |||
| JP2016219274A | 2016-12-22 | |||
| JP2015199095A | 2015-11-12 | |||
| CN202111318931A | 2021-11-09 |
Attorney, Agent or Firm:
ACIP LAW OFFICES (CN)
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