Title:
BATTERY HAVING WINDING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/113999
Kind Code:
A1
Abstract:
A battery having a winding structure, relating to the technical field of batteries. The battery comprises a cell (4), formed by successively overlaying a first pole piece (1), an isolating film (3) and a second pole piece (2) with an electrical property opposite to that of the first pole piece (1) and then winding same in the same direction, and an electrolyte thereof. The first pole piece (1) comprises a first current collector (12) and a first active substance layer (11) attached to the surface of the first current collector (12). The second pole piece (2) comprises a second current collector (22) and a second active substance layer (21) attached to the surface of the second current collector (22). The first active substance layer (11) is provided with a first groove (111), and the second active substance layer (21) is provided with a second groove (211). The first groove (111) is located at the start end of the winding first pole piece (1), and the second groove (211) is located at the start end or the middle of the winding second pole piece (2). A first tab (5) is embedded in the first groove (111), and a second tab (6) is embedded in the second groove (211). The battery optimizes the positions where the tabs (5, 6) are located on the pole pieces (1, 2), so that the problems of the cell (4), such as low hardness, easy deformation and poor symmetry, are solved, and the passing rate of a battery abuse test is improved.
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Inventors:
LI BINGJIANG (CN)
NIU SHAOJUN (CN)
NIU SHAOJUN (CN)
Application Number:
PCT/CN2016/105421
Publication Date:
July 06, 2017
Filing Date:
November 11, 2016
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M10/0587; H01M50/533; H01M50/538
Foreign References:
| CN104600250A | 2015-05-06 | |||
| CN203733894U | 2014-07-23 | |||
| CN204204984U | 2015-03-11 | |||
| CN205355186U | 2016-06-29 | |||
| CN102201594A | 2011-09-28 |
Attorney, Agent or Firm:
BEIJING UNI-INTEL PATENT AND TRADEMARK OFFICE (CN)
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