Title:
二次電池
Document Type and Number:
Japanese Patent JP7084299
Kind Code:
B2
Abstract:
A negative-electrode core laminate of a portion of a negative-electrode core on which no negative-electrode active material layer is formed is bonded to a negative-electrode current collector by ultrasonic bonding. A core recess is formed in a bonding region of the negative-electrode core laminate bonded to the negative-electrode current collector by ultrasonic bonding, a region of the negative-electrode core laminate in which the core recess is formed includes a solid-state bonding layer and a central layer, the solid-state bonding layer being formed by solid-state bonding between layers of the negative-electrode core, the central layer being disposed between the solid-state bonding layers formed on both faces of the negative-electrode core. The average grain size of metal crystal grains constituting the solid-state bonding layer is smaller than the average grain size of metal crystal grains constituting the central layer.
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Inventors:
Matsumasa Yoshitaka
Application Number:
JP2018245220A
Publication Date:
June 14, 2022
Filing Date:
December 27, 2018
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H01M50/536; H01M4/66; H01M10/04; H01M10/0587; H01M50/534; H01M50/538
Domestic Patent References:
| JP2018125110A | ||||
| JP2015199095A | ||||
| JP2010282846A | ||||
| JP2017182905A |
Foreign References:
| WO2018159197A1 | ||||
| WO2013005555A1 | ||||
| WO2019150825A1 |
Attorney, Agent or Firm:
Maeda patent office