Pouch-type secondary battery including pouch case with concave groove having bottom surface with area larger than opening area of concave groove and pouch film forming apparatus
US-10818884-B2 · Oct 27, 2020 · US
Pouch-type secondary battery, and pouch film forming device
US11196113B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11196113-B2 |
| Application number | US-201816466800-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 9, 2018 |
| Priority date | Sep 14, 2017 |
| Publication date | Dec 7, 2021 |
| Grant date | Dec 7, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Disclosed is a pouch-type secondary battery, which includes an electrode assembly having a positive electrode plate and a negative electrode plate disposed to face each other and a pouch case having a concave groove formed to accommodate the electrode assembly, wherein the pouch case includes a first pouch film and a second pouch film thermally fused to the first pouch film, and wherein a concave groove is formed in at least one of the first pouch film and the second pouch film, and the concave groove has a bottom surface on which the electrode assembly is placed so that the bottom surface has an area equal to or greater than an area of a reference surface that covers an opening of the concave groove.
First claim
Opening claim text (preview).
What is claimed is: 1. A pouch-type secondary battery, which includes an electrode assembly having a positive electrode plate and a negative electrode plate disposed to face each other and a pouch case having a concave groove formed to accommodate the electrode assembly, wherein the pouch case includes a first pouch film and a second pouch film thermally fused to the first pouch film, and wherein the concave groove is formed in at least one of the first pouch film and the second pouch film, and the concave groove has a bottom surface on which the electrode assembly is placed so that the bottom surface has an area equal to or greater than an area of a reference surface that covers an opening of the concave groove, wherein the concave groove includes a first side surface region extending from the reference surface and a second side surface region extending from an end point of the first side surface region to the bottom surface, wherein the electrode assembly includes a first battery cell group stacked in the first side surface region and a second battery cell group stacked in the second side surface region, a first full width of each battery cell of the first battery cell group corresponds to a first full width of the concave groove included in the first side surface region, and a second full width of each battery cell of the second battery cell group corresponds to a second full width of the concave groove included in the second side surface region, wherein the second full width of each battery cell of the second battery cell group is greater than the first full width of each battery cell of the first battery cell group, and wherein the end point of the first side surface region is closer to the reference surface than to the bottom surface, such that a height of the second side surface region in a depth direction from the reference surface is greater than a height of the first side surface region in the depth direction. 2. The pouch-type secondary battery according to claim 1 , further comprising: an inner film configured to surround an outer circumference of the electrode assembly accommodated in the pouch case. 3. The pouch-type secondary battery according to claim 1 , wherein the concave groove is formed at the first pouch film. 4. The pouch-type secondary battery according to claim 3 , wherein the first pouch film and the second pouch film are formed using a single film, and the second pouch film is disposed to overlap the first pouch film to form a single cup-type pouch case. 5. The pouch-type secondary battery according to claim 1 , wherein in the first side surface region the first full width of the concave groove is gradually decreased in a depth direction from the reference surface and in the second side surface region the second full width of the concave groove is gradually increased from the end point of the first side surface region in the depth direction to the bottom surface. 6. The pouch-type secondary battery according to claim 5 , wherein the first side surface region has a rounded shape. 7. The pouch-type secondary battery according to claim 5 , wherein a full width of the electrode assembly corresponds to the first full width of the concave groove at the end point of the first side surface region.
Assignees
Inventors
Classifications
- H01M8/2475Primary
Enclosures, casings or containers of fuel cell stacks · CPC title
on the same side of the cell · CPC title
- H01M50/105Primary
Pouches or flexible bags · CPC title
Terminals adapted for prismatic, pouch or rectangular cells · CPC title
having a layered structure · CPC title
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Frequently asked questions
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- What does patent US11196113B2 cover?
- Disclosed is a pouch-type secondary battery, which includes an electrode assembly having a positive electrode plate and a negative electrode plate disposed to face each other and a pouch case having a concave groove formed to accommodate the electrode assembly, wherein the pouch case includes a first pouch film and a second pouch film thermally fused to the first pouch film, and wherein a conca…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M8/2475. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 07 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).