Assembled battery
First Claim
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1. An assembled battery comprising:
- unit cells each including a flat main body, a positive electrode tab disposed at a first end side in a lateral direction of the main body, and a negative electrode tab disposed a second end side in the lateral direction of the main body, the positive electrode tab and the negative electrode tab extending along a first surface of the main body and longitudinally away from the main body in a same direction;
cell stack formed by stacking the unit cells facing in an identical direction;
positive electrode-side bus bars each being connected to the positive electrode tab; and
negative electrode-side bus bars each being connected to the negative electrode tab;
wherein each of the positive electrode-side bus bar and the negative electrode-side bus bar has a first connection portion, a second connection portion and a coupling portion having a stepped portion connecting the first and second connect portions, the first connection portion and the second connection portion extending substantially parallel to each other,the first connection portion of each of the bus bars is disposed on at least a portion of the corresponding electrode tab, andin the unit cells that are adjacent to each other in the cell stack, the positive electrode-side bus bar connected to the positive electrode tab of a first unit cell of the unit cells and the negative electrode-side bus bar connected to the negative electrode tab of a second unit cell of the unit cells are connected to each other on a first surface of the cell stack.
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Abstract
An assembled battery includes a cell stack formed by stacking a plurality of unit cells in the same direction, positive electrode-side bus bars respectively connected to positive electrode tabs of the unit cells, and negative electrode-side bus bars respectively connected to negative electrode tabs of the unit cells. A positive electrode-side bus bar connected to a positive electrode tab of a first unit cell of adjacent unit cells in the cell stack, and a negative electrode-side bus bar connected to a negative electrode tab of a second unit cell, are connected to each other on one of the surfaces of the cell stack.
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Citations
13 Claims
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1. An assembled battery comprising:
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unit cells each including a flat main body, a positive electrode tab disposed at a first end side in a lateral direction of the main body, and a negative electrode tab disposed a second end side in the lateral direction of the main body, the positive electrode tab and the negative electrode tab extending along a first surface of the main body and longitudinally away from the main body in a same direction; cell stack formed by stacking the unit cells facing in an identical direction; positive electrode-side bus bars each being connected to the positive electrode tab; and negative electrode-side bus bars each being connected to the negative electrode tab; wherein each of the positive electrode-side bus bar and the negative electrode-side bus bar has a first connection portion, a second connection portion and a coupling portion having a stepped portion connecting the first and second connect portions, the first connection portion and the second connection portion extending substantially parallel to each other, the first connection portion of each of the bus bars is disposed on at least a portion of the corresponding electrode tab, and in the unit cells that are adjacent to each other in the cell stack, the positive electrode-side bus bar connected to the positive electrode tab of a first unit cell of the unit cells and the negative electrode-side bus bar connected to the negative electrode tab of a second unit cell of the unit cells are connected to each other on a first surface of the cell stack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification