US11515596B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11515596-B2 |
| Application number | US-201816761649-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 11, 2018 |
| Priority date | Nov 10, 2017 |
| Publication date | Nov 29, 2022 |
| Grant date | Nov 29, 2022 |
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A method for manufacturing an electricity-storage module includes: preparing a stacked body and first sealing portions; processing an extension portion of one or more first sealing portions included in an outer edge portion in a stacking direction of the stacked body so that an extension portion length of the one or more of first sealing portions becomes shorter than a length of the extension portions of the first sealing portions which are not included in the outer edge portion; and forming a second sealing portion that is provided at the periphery of the first sealing portions when viewed from the stacking direction and covers at least parts of outer surfaces of the first sealing portions located at stacking ends of the stacked body in the stacking direction by injection molding in which a resin material is caused to circulate in a mold frame.
Opening claim text (preview).
The invention claimed is: 1. An electricity-storage module, comprising: a stacked body that is obtained by stacking a plurality of electrodes; and a sealing portion that is provided in the stacked body to surround edge portions of the plurality of electrodes when viewed from a stacking direction of the stacked body, wherein the plurality of electrodes include a plurality of bipolar electrodes, a negative terminal electrode, and a positive terminal electrode, each of the plurality of bipolar electrodes includes an electrode plate, a positive electrode provided on a first surface of the electrode plate, and a negative electrode provided on a second surface of the electrode plate which is opposite to the first surface, the negative terminal electrode includes the electrode plate and the negative electrode provided on the second surface of the electrode plate, and is disposed at one end of the stacked body in the stacking direction in such a manner that the second surface is located on an inner side of the stacked body, the positive terminal electrode includes the electrode plate and the positive electrode provided on the first surface of the electrode plate, and is disposed at the other end of the stacked body in the stacking direction in such a manner that the first surface is located on an inner side of the stacked body, the sealing portion includes a plurality of first sealing portions which are respectively provided at edge portions of the plurality of electrodes, and a second sealing portion that is joined to the plurality of first sealing portions to surround the plurality of first sealing portions when viewed from the stacking direction, the second sealing portion includes: a first flange portion that is in contact with a first terminal sealing portion that is one of the plurality of first sealing portions which is provided at an edge portion of the negative terminal electrode at one end of the stacked body, and includes a portion that overlaps the first terminal sealing portion when viewed from the stacking direction; and a second flange portion that is in contact with a second terminal sealing portion that is one of the plurality of first sealing portions which is provided at an edge portion of the positive terminal electrode at the other end of the stacked body, and includes a portion that overlaps the second terminal sealing portion when viewed from the stacking direction, wherein the first flange portion, the first terminal sealing portion, and the electrode plate of the negative terminal electrode include first portions overlapping each other when viewed from the stacking direction, and the second flange portion, the second terminal sealing portion, and the electrode plate of the positive terminal electrode include second portions overlapping each other when viewed from the stacking direction. 2. The electricity-storage module according to claim 1 , wherein at least the first flange portion and the negative terminal electrode include portions overlapping each other when viewed from the stacking direction. 3. The electricity-storage module according to claim 1 , wherein each of the plurality of first sealing portions includes an extension portion that extends from an end portion of the electrode plate, and a length of the extension portion of the one or the plurality of first sealing portions included in an outer edge portion in a stacking direction of the stacked body is shorter than a length of the extension portion of the one or the plurality of first sealing portions which are not included in the outer edge portion. 4. An electricity-storage module, comprising: a stacked body that is obtained by stacking a plurality of electrodes; and a sealing portion that is provided in the stacked body to surround edge portions of the plurality of electrodes when viewed from a stacking direction of the stacked body, wherein the plurality of electrodes include a plurality of bipolar electrodes, a negative terminal electrode, and a positive terminal electrode, each of the plurality of bipolar electrodes includes an electrode plate, a positive electrode provided on a first surface of the electrode plate, and a negative electrode provided on a second surface of the electrode plate which is opposite to the first surface, the negative terminal electrode includes the electrode plate and the negative electrode provided on the second surface of the electrode plate, and is disposed at one end of the stacked body in the stacking direction in such a manner that the second surface is located on an inner side of the stacked body, the positive terminal electrode includes the electrode plate and the positive electrode provided on the first surface of the electrode plate, and is disposed at the other end of the stacked body in the stacking direction in such a manner that the first surface is located on an inner side of the stacked body, the sealing portion includes a plurality of first sealing portions which are respectively provided at edge portions of the plurality of electrodes, and a second sealing portion that is joined to the plurality of first sealing portions to surround the plurality of first sealing portions when viewed from the stacking direction, the second sealing portion includes: a first flange portion that is in contact with a first terminal sealing portion that is one of the plurality of first sealing portions which is provided at an edge portion of the negative terminal electrode at one end of the stacked body, and includes a portion that overlaps the first terminal sealing portion when viewed from the stacking direction; and a second flange portion that is in contact with a second terminal sealing portion that is one of the plurality of first sealing portions which is provided at an edge portion of the positive terminal electrode at the other end of the stacked body, and includes a portion that overlaps the second terminal sealing portion when viewed from the stacking direction, at least one set between a set of the first flange portion and the negative terminal electrode, and a set of the second flange portion and the positive terminal electrode includes portions overlapping each other when viewed from the stacking direction, wherein each of the plurality of first sealing portions includes an extension portion that extends from an end portion of the electrode plate, and a length of the extension portion of the one or the plurality of first sealing portions included in an outer edge portion in a stacking direction of the stacked body is shorter than a length of the extension portion of the one or the plurality of first sealing portions which are not included in the outer edge portion.
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