US 12,341,221 B2
Battery and portable electrical device
Ning Peng, Zhuhai (CN)
Assigned to ZHUHAI COSMX BATTERY CO., LTD., Zhuhai (CN)
Filed by Zhuhai CosMX Battery Co., Ltd., Zhuhai (CN)
Filed on Nov. 16, 2023, as Appl. No. 18/510,772.
Application 18/510,772 is a continuation of application No. 17/028,344, filed on Sep. 22, 2020, granted, now 11,824,227.
Claims priority of application No. 202010567298.X (CN), filed on Jun. 19, 2020.
Prior Publication US 2024/0088527 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/531 (2021.01); H01M 10/04 (2006.01)
CPC H01M 50/531 (2021.01) [H01M 10/049 (2013.01); H01M 2220/30 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A battery, comprising a housing and a battery cell disposed in the housing; wherein
the battery cell comprises electrodes and tabs, and each of the electrodes is connected with a tab, wherein each of the electrodes comprises a current collector and an active material layer, and the current collector comprises a coating zone coated with the active material layer and an empty foil zone not coated with the active material layer, and an end of the tab is welded to the empty foil zone;
a surface of the empty foil zone facing away from the tab has a plurality of welding zones which are arranged at intervals, and each of the welding zones comprises at least two line-shaped welding marks which are disposed in parallel with each other, and a distance between two adjacent line-shaped welding marks is larger than 50 μm;
a surface of the tab facing away from the empty foil zone has no welding mark;
a ratio of a height of each of the line-shaped welding marks to a width of each of the line-shaped welding marks is less than 1;
the electrodes of the battery cell comprises a positive electrode and a negative positive electrode, and the tabs comprises a positive tab and a negative tab;
a welding tension between the positive electrode and the positive tab is greater than 25 N; and/or,
a welding tension between the negative electrode and the negative tab is greater than 8 N.