SECONDARY BATTERY
First Claim
1. A secondary battery comprising:
- an electrode group including a positive electrode plate, a negative electrode plate, and a porous insulating layer disposed between the positive electrode plate and the negative electrode plate, where the positive electrode plate, the negative electrode plate, and the porous insulating layer are arranged such that an exposed end which is one end in a width direction of at least one of the positive electrode plate and the negative electrode plate projects from the porous insulating layer; and
a current collector plate connected to the exposed end, whereinthe secondary battery is a non-aqueous electrolyte secondary battery,the electrode group includesthe exposed end in which a current collector is exposed, anda body portion which is located at an inner position relative to the exposed end in the width direction of the electrode plate, and has an active material provided on a surface of the current collector,the current collector plate includesa principal surface to which the exposed end is connected, andprojections which are disposed on at least portions of a periphery of the principal surface, and sandwich the exposed end in a direction perpendicular to a longitudinal direction of the exposed end,in the electrode group, the positive electrode plate and the negative electrode plate are wound with the porous insulating layer interposed therebetween,the electrode group has a cylindrical shape, andin a direction in which the positive electrode plate, the porous insulating layer, and the negative electrode plate are sequentially arranged, a width of the current collector plate is larger than or equal to a length obtained by subtracting the length of the exposed end from the width of the body portion, and is equal to or smaller than a width of the body portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A secondary battery has a so-called tabless structure. An electrode group (4) includes an exposed end (1a) and a body portion (5). In the exposed end (1a), a current collector is exposed. In the body portion (5), an active material is provided on a surface of the current collector. A current collector plate (10) includes a principal surface (11) to which the electrode group (4) is connected, and projections (13) provided on the periphery of the principal surface (11). Moreover, in a direction in which a positive electrode plate (1), a porous insulating layer (3) and a negative electrode plate (2) are sequentially arranged, a width of the current collector plate (10) is equal to or smaller than a width of the body portion (5). Furthermore, the projections (13) sandwich the exposed end (1a) in a direction perpendicular to a longitudinal direction of the exposed end (1a).
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Citations
4 Claims
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1. A secondary battery comprising:
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an electrode group including a positive electrode plate, a negative electrode plate, and a porous insulating layer disposed between the positive electrode plate and the negative electrode plate, where the positive electrode plate, the negative electrode plate, and the porous insulating layer are arranged such that an exposed end which is one end in a width direction of at least one of the positive electrode plate and the negative electrode plate projects from the porous insulating layer; and a current collector plate connected to the exposed end, wherein the secondary battery is a non-aqueous electrolyte secondary battery, the electrode group includes the exposed end in which a current collector is exposed, and a body portion which is located at an inner position relative to the exposed end in the width direction of the electrode plate, and has an active material provided on a surface of the current collector, the current collector plate includes a principal surface to which the exposed end is connected, and projections which are disposed on at least portions of a periphery of the principal surface, and sandwich the exposed end in a direction perpendicular to a longitudinal direction of the exposed end, in the electrode group, the positive electrode plate and the negative electrode plate are wound with the porous insulating layer interposed therebetween, the electrode group has a cylindrical shape, and in a direction in which the positive electrode plate, the porous insulating layer, and the negative electrode plate are sequentially arranged, a width of the current collector plate is larger than or equal to a length obtained by subtracting the length of the exposed end from the width of the body portion, and is equal to or smaller than a width of the body portion. - View Dependent Claims (3, 4)
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2. (canceled)
Specification