Laminated battery and method of manufacturing laminated battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKenichi KAKISHITA
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Abstract
A laminated battery has an electrode body and a laminate sheet covering the electrode body, and has a fused portion at which one end side and another end side of the laminate sheet that covers the electrode body are fused together. The fused portion has a step portion at which a thickness of a region near the electrode body side is thinner than a thickness of a region far from the electrode body side. Ratio (LS1/LE) of outer peripheral length LE of the electrode body and inner peripheral length LS1 of the laminate sheet that covers the electrode body is greater than or equal to 1.00 and less than or equal to 1.05.
Claims5
A laminated battery comprising:
- an electrode body;
- and
- a laminate sheet that covers the electrode body,
- wherein:
- the laminated battery has a fused portion at which one end side and another end side of the laminate sheet, which covers the electrode body, are fused,
- the fused portion has a step portion at which a thickness of a region near an electrode body side is thinner than a thickness of a region far from the electrode body side, and
- a ratio (LS1/LE) of an outer peripheral length LE of the electrode body and an inner peripheral length LS1 of the laminate sheet that covers the electrode body is greater than or equal to 1.00 and less than or equal to 1.05.
A method of manufacturing a laminated battery having:
- an electrode body;
- and
- a laminate sheet that covers the electrode body,
- wherein:
- the laminated battery has a fused portion at which one end side and another end side of the laminate sheet, which covers the electrode body, are fused,
- the fused portion is formed by fusing steps that are carried out two or more times, while shifting a position;
- a region, which is further from an electrode body side than a region fused in a fusing step of a second time, is fused in a fusing step of a first time;
- and
- a region, which is nearer to the electrode body side than a region fused in the fusing step of the first time, is fused in the fusing step of the second time, and fusing in the fusing step of the second time is carried out such that a ratio ((LS0−2×L2)/LE) of a length obtained by subtracting a value that is twice a length L2 from an end portion at the electrode body side of the region fused in the fusing step of the first time to an end portion at the electrode body side of the region fused in the fusing step of the second time, from an inner peripheral length Lso of the laminate sheet after fusing in the fusing step of the first time and before fusing in the fusing step of the second time, and an outer peripheral length LE of the electrode body, is greater than or equal to 1.00 and less than or equal to 1.05.
Dependencies are inferred from the claim text.