US10797338B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10797338-B2 |
| Application number | US-201514951321-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 24, 2015 |
| Priority date | Nov 24, 2014 |
| Publication date | Oct 6, 2020 |
| Grant date | Oct 6, 2020 |
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A flexible secondary battery includes: an electrode stack assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate. One end of the first electrode tab and one end of the second electrode tab are disposed inside the electrode stack assembly and are stacked together with the first electrode plate, the second electrode plate, and the separator to form the electrode stack assembly. A first welding part is formed between, and binds, at least one of i) a portion of the first electrode plate and a portion of the first electrode tab and ii) a portion of the second electrode plate and a portion of the second electrode tab.
Opening claim text (preview).
What is claimed is: 1. A flexible secondary battery comprising: an electrode stack assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate, wherein one end of the first electrode tab and one end of the second electrode tab are disposed inside the electrode stack assembly and are stacked together with the first electrode plate, the second electrode plate, and the separator to form the electrode stack assembly, wherein a remaining portion of the first electrode tab and a remaining portion of the second electrode are disposed outside the electrode stack assembly, and wherein: the electrode stack assembly has a rectangular shape, the first electrode plate includes a first active material part coated with a first active material and a first uncoated part uncoated with the first active material, and the second electrode plate includes a second active material part coated with a second active material and a second uncoated part uncoated with the second active material, the first uncoated part of the first electrode plate includes a first protruding part protruding from the rectangular electrode stack assembly, and a first embedded part that is a portion of the first uncoated part different from and not vertically overlapping the first protruding part, the second uncoated part of the second electrode plate includes a second protruding part protruding from the rectangular electrode stack assembly, and a second embedded part that is a portion of the second uncoated part different from and not vertically overlapping the second protruding part, a first welding part is formed on an outer surface of the first or second electrode plate, and binds at least one of i) the first embedded part of the first uncoated part of the first electrode plate and a portion of the first electrode tab and ii) the second embedded part of the second uncoated part of the second electrode plate and a portion of the second electrode tab, and the first welding part is not formed on the remaining portions of the first and second electrode tabs. 2. The flexible secondary battery of claim 1 , wherein: the first uncoated part is located at a position where the first electrode plate and the first electrode tab contact each other, and the second uncoated part is located at a position where the second electrode plate and the second electrode tab contact each other. 3. The flexible secondary battery of claim 2 , wherein the first electrode tab and the second electrode tab are disposed inside the first protruding part and the second protruding part, respectively. 4. The flexible secondary battery of claim 2 , wherein at least one of the first embedded part and the second embedded part is fixed by a welding process. 5. The flexible secondary battery of claim 1 , wherein the first electrode tab is disposed on the first protruding part and the second electrode tab is disposed on the second protruding part. 6. The flexible secondary battery of claim 5 , wherein at least one of the first protruding part, the first embedded part, the second protruding part, and the second embedded part is fixed by a welding process.
characterised by the method of fixing the leads to the electrodes, e.g. by welding · CPC title
Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title
characterised by the material · CPC title
Electrode connections inside a battery casing · CPC title
Fixed electrical connections, i.e. not intended for disconnection · CPC title
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