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US 12,002,998 B2Granted
Secondary battery
AssigneePrime Planet Energy & Solutions, Inc.
InventorsYukio Harima, Ryoichi Wakimoto
Life of this patent
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Abstract
A technology is provided which suppresses the movement of an electrode body inside of a battery case, and prevents the damage at a junction between an electrode tab group and a collector. A secondary battery herein disclosed includes an exterior body, a sealing plate, an electrode body, an electrode tab group, a terminal, and a collector. The collector has a first region part to be joined with the electrode tab group, a second region part to be joined with the terminal, and a third region part closer to the electrode body than the first region part.
Claims10
A secondary battery, comprising:
- an exterior body having a bottom wall, a pair of first sidewalls extending from the bottom wall and facing each other, a pair of second sidewalls extending from the bottom wall and facing each other, and an opening facing the bottom wall;
- a sealing plate sealing the opening;
- an electrode body accommodated in an inside of the exterior body, and including a long band-shaped first electrode sheet, and a long band-shaped second electrode sheet having a different polarity from that of the first electrode sheet;
- a first electrode tab group provided at a first end face of the electrode body facing one of the pair of first sidewalls, and electrically connected with the first electrode sheet;
- a second electrode tab group provided on a second end face of the electrode body facing the other of the pair of first sidewalls, and electrically connected with the second electrode sheet;
- a terminal fixed at the sealing plate;
- and
- a collector electrically connected with the terminal and the electrode body,
- wherein
- the first electrode sheet comprises:
- a first electrode collecting foil;
- a first electrode active material layer fixed on at least one surface of the first electrode collecting foil;
- and,
- first electrode tabs, respectively protruding toward one side in a width direction orthogonal to the longitudinal direction of the first electrode sheet, and provided at intervals along the longitudinal direction of the first electrode sheet,
- the first electrode tab group comprises the first electrode tabs stacked at the first end face,
- the second electrode sheet comprises:
- a second electrode collecting foil;
- a second electrode active material layer fixed on at least one surface of the second electrode collecting foil;
- and,
- second electrode tabs, respectively protruding toward one side in the width direction, and provided at intervals along the longitudinal direction of the second electrode sheet,
- the second electrode tab group comprises the second electrode tabs stacked at the second end face,
- the collector has a first collector to be connected with the first electrode tab group, and a second collector to be connected with the second electrode tab group, and
- at least any one of the first collector and the second collector has:
- a first region part to be joined with the first electrode tab group or the second electrode tab group,
- a second region part to be connected with the terminal, and
- a third region part closer to the electrode body than the first region part, wherein
- the first region part is directly joined with a first electrode tab in the first electrode tab group or with a second electrode tab in the second electrode tab group.
24 more elements
A secondary battery, comprising:
- an exterior body having a bottom wall, a pair of first sidewalls extending from the bottom wall and facing each other, a pair of second sidewalls extending from the bottom wall and facing each other, and an opening facing the bottom wall;
- a sealing plate sealing the opening;
- an electrode body accommodated in an inside of the exterior body, and including a first electrode sheet, and a second electrode sheet having a different polarity from that of the first electrode sheet;
- a first electrode tab group provided at a first end face of the electrode body facing one of the pair of first sidewalls, and electrically connected with the first electrode sheet;
- a second electrode tab group provided on a second end face of the electrode body facing the other of the pair of first sidewalls, and electrically connected with the second electrode sheet;
- a terminal fixed at the sealing plate;
- and
- a collector electrically connected with the terminal and the electrode body,
- wherein
- the collector has a first collector to be connected with the first electrode tab group, and a second collector to be connected with the second electrode tab group, and
- at least any one of the first collector and the second collector has:
- a first region part to be joined with the first electrode tab group or the second electrode tab group,
- a second region part to be connected with the terminal, the second region part arranged above the first region part on the sealing plate side and
- a projection-shaped third region part which is closer to the electrode body than the first region part, and projects from the second region part toward the electrode body, wherein
- the first region part is directly joined with a first electrode tab in the first electrode tab group or with a second electrode tab in the second electrode tab group.
12 more elements
A secondary battery, comprising:
- an exterior body having a bottom wall, a pair of first sidewalls extending from the bottom wall and facing each other, a pair of second sidewalls extending from the bottom wall and facing each other, and an opening facing the bottom wall;
- a sealing plate sealing the opening;
- an electrode body accommodated in an inside of the exterior body, and including a first electrode sheet, and a second electrode sheet having a different polarity from that of the first electrode sheet;
- a first electrode tab group provided at a first end face of the electrode body facing one of the pair of first sidewalls, and electrically connected with the first electrode sheet;
- a second electrode tab group provided on a second end face of the electrode body facing the other of the pair of first sidewalls, and electrically connected with the second electrode sheet;
- a terminal fixed at the sealing plate;
- and
- a collector electrically connected with the terminal and the electrode body,
- wherein
- the terminal comprises a collector connection part comprising:
- an upper part arranged along an inner surface of the sealing plate;
- and
- a lower part extending from the upper part toward the bottom wall side;
- the collector has a first collector to be connected with the first electrode tab group, and a second collector to be connected with the second electrode tab group, and
- at least any one of the first collector and the second collector has:
- a first region part to be joined with the first electrode tab group or the second electrode tab group;
- a second region part to be connected with the terminal, the second region part arranged above the first region part on the sealing plate side;
- and
- a step part extending from an upper edge of the first region part on the sealing plate side to the electrode body;
- and
- the second region part
- extends from one end of the step part on the electrode body side to the sealing plate,
- is connected to a face on the lower part on the electrode body side, and
- is closer to the electrode body than the first region part, wherein
- the first region part is directly joined with a first electrode tab in the first electrode tab group or with a second electrode tab in the second electrode tab group.
22 more elements
Dependencies are inferred from the claim text.