Energy storage device
First Claim
1. An energy storage device, comprising:
- electrode terminals;
an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate;
current collectors which connect the electrode terminals and the electrode assembly to each other,wherein at least one of the positive electrode plate and the negative electrode plate includes a plurality of tab groups which are joined to one of the current collectors, each tab group being formed by stacking one or more tabs projecting toward the electrode terminals, andwherein at least one tab group among the tab groups and one current collector among the current collectors include a swaged joint portion, the swaged joint portion projecting from one tab group among the tab groups or one current collector among the current collectors to an other one of the one tab group among the tab groups or the one current collector among the current collectors; and
a cover material which overlaps with the at least one tab group among the tab groups and is fixed with the at least one tab group among the tab groups, andwherein, in a stacking direction of the cover material on the at least one tab group, a projection portion or a recessed portion extends on a surface of the cover material, and the projection portion or the recessed portion is disposed at a position away from the swaged joint portion.
1 Assignment
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Accused Products
Abstract
An energy storage device comprising: electrode terminals; an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate; and current collectors which connect the electrode terminals and the electrode assembly to each other, wherein at least one of the positive electrode plate and the negative electrode plate has a plurality of tab groups which are joined to the current collector, each tab group being formed by stacking one or more tabs projecting toward the electrode terminal, and at least one tab group among the tab groups and the current collector has a swaged joint portion, the swaged joint portion projecting from either one of the tab group or the current collector to the other of the tab group or the current collector.
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Citations
17 Claims
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1. An energy storage device, comprising:
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electrode terminals; an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate; current collectors which connect the electrode terminals and the electrode assembly to each other, wherein at least one of the positive electrode plate and the negative electrode plate includes a plurality of tab groups which are joined to one of the current collectors, each tab group being formed by stacking one or more tabs projecting toward the electrode terminals, and wherein at least one tab group among the tab groups and one current collector among the current collectors include a swaged joint portion, the swaged joint portion projecting from one tab group among the tab groups or one current collector among the current collectors to an other one of the one tab group among the tab groups or the one current collector among the current collectors; and a cover material which overlaps with the at least one tab group among the tab groups and is fixed with the at least one tab group among the tab groups, and wherein, in a stacking direction of the cover material on the at least one tab group, a projection portion or a recessed portion extends on a surface of the cover material, and the projection portion or the recessed portion is disposed at a position away from the swaged joint portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An energy storage device, comprising:
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an electrode terminal; an electrode assembly formed by stacking a positive electrode plate and a negative electrode plate; and a current collector which connects the electrode terminal and the electrode assembly to each other, wherein one of the positive electrode plate and the negative electrode plate includes a plurality of tab groups which are joined to the current collector, each tab group being formed by stacking one or more tabs projecting toward the electrode terminal, wherein at least one tab group among the tab groups and the current collector includes a swaged joint portion, the swaged joint portion projecting from one of the tab group or the current collector to an other one of the tab group or the current collector, and wherein the current collector includes; a first connecting portion which has a plate shape; and a second connecting portion and a third connecting portion which project from the first connecting portion toward the electrode assembly. - View Dependent Claims (15, 16)
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17. An energy storage device, comprising:
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electrode terminals; an electrode assembly formed by stacking and winding a positive electrode plate and a negative electrode plate and; current collectors which connect the electrode terminals and the electrode assembly to each other, wherein at least one of the positive electrode plate and the negative electrode plate includes a plurality of tab groups which are joined to one of the current collectors, each tab group being formed by stacking one or more tabs projecting toward the electrode terminals, and wherein at least one tab group among the tab groups and one current collector among the current collectors include a swaged joint portion, the swaged joint portion projecting from one tab group among the tab groups or one current collector among the current collectors to an other one of the one tab group among the tab groups or the one current collector among the current collectors; and a cover material disposed on a surface of the at least one tab group, wherein, in a stacking direction of the cover material on the at least one tab group, a projection portion or a recessed portion extends on a surface of the cover material, and the projection portion or the recessed portion is disposed at a position away from the swaged joint portion.
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Specification