Secondary battery and method of manufacturing the same
First Claim
1. A method of manufacturing a secondary battery having an electrode winding body that includes a positive electrode and a negative electrode, and has a non-rectangular shape in a planar view thereof, the manufacturing method comprising:
- forming an electrode precursor laminate by stacking a positive electrode precursor on a negative electrode precursor with a separator interposed therebetween; and
winding the electrode precursor laminate to form the electrode winding body, with the winding performed about a winding axis that is substantially parallel to an extending direction of a terminal element of the secondary battery,wherein the electrode precursor laminate has a comb-teeth shape in the planar view and the electrode winding body is a non-rectangular shape in the planar view thereof,wherein the winding of the electrode precursor laminate is performed such that a middle of each of a narrow portion and a wide portion in the comb-teeth shape is configured as a bending location in the winding and the terminal element is disposed in the narrow portion of the comb-teeth shape, andwherein the narrow and wide portions each have a width extending in a direction parallel to the winding axis and the width of the narrow portion is less than the width of the wide portion.
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Accused Products
Abstract
A method of manufacturing a secondary battery is provided for manufacturing a secondary battery that includes an electrode winding body formed of a positive electrode and a negative electrode, and having a non-rectangular shape in planar view. In this manufacturing method, a positive electrode precursor and a negative electrode precursor are stacked on each other with a separator interposed therebetween to form an electrode precursor laminate, which is wound to form the electrode winding body. Moreover, the electrode precursor laminate has a comb-teeth shape in planar view, and winding is performed such that a winding axis for winding is substantially parallel to an extending direction of a terminal element of the secondary battery, whereby the electrode winding body is made non-rectangular.
13 Citations
16 Claims
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1. A method of manufacturing a secondary battery having an electrode winding body that includes a positive electrode and a negative electrode, and has a non-rectangular shape in a planar view thereof, the manufacturing method comprising:
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forming an electrode precursor laminate by stacking a positive electrode precursor on a negative electrode precursor with a separator interposed therebetween; and winding the electrode precursor laminate to form the electrode winding body, with the winding performed about a winding axis that is substantially parallel to an extending direction of a terminal element of the secondary battery, wherein the electrode precursor laminate has a comb-teeth shape in the planar view and the electrode winding body is a non-rectangular shape in the planar view thereof, wherein the winding of the electrode precursor laminate is performed such that a middle of each of a narrow portion and a wide portion in the comb-teeth shape is configured as a bending location in the winding and the terminal element is disposed in the narrow portion of the comb-teeth shape, and wherein the narrow and wide portions each have a width extending in a direction parallel to the winding axis and the width of the narrow portion is less than the width of the wide portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A secondary battery comprising:
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an electrode winding body including a positive electrode, a negative electrode, and a separator disposed therebetween, with the electrode winding body including a winding structure in which the positive electrode, the negative electrode, and the separator are integrally wound; and an exterior body that wraps the electrode winding body, wherein the secondary battery comprises a non-rectangular shape in a planar view thereof with a narrow portion and wide portion, wherein a winding axis of the winding structure is substantially parallel to an extending direction of a terminal element of the secondary battery, wherein the narrow portion and wide portion each have a width extending parallel to the winding axis, with the width of the narrow portion being less than the width of the wide portion, and wherein each of the positive electrode, the negative electrode and the separator has a comb-teeth shape in a non-wound state and the terminal element is disposed in the narrow portion of the comb-teeth shape. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification