COIN-SHAPED LITHIUM SECONDARY BATTERY AND IoT DEVICE
US-2021043919-A1 · Feb 11, 2021 · US
Coin-type lithium secondary cell
US12119501B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12119501-B2 |
| Application number | US-202117203950-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 17, 2021 |
| Priority date | Oct 30, 2018 |
| Publication date | Oct 15, 2024 |
| Grant date | Oct 15, 2024 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A coin-type lithium secondary cell for soldering by reflow method includes a positive electrode including a lithium composite oxide, a negative electrode, an electrolyte layer provided between the positive electrode and the negative electrode and including an electrolytic solution, a cell case having an enclosed space in which the positive electrode, the negative electrode, and the electrolyte layer are housed. The positive electrode and the negative electrode as a whole contains 3.0% by mass or less of lithium carbonate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A coin-type lithium secondary cell for soldering by reflow method, comprising: a positive electrode containing a lithium composite oxide; a negative electrode; an electrolyte layer provided between said positive electrode and said negative electrode and containing an electrolytic solution; and a cell case having an enclosed space in which said positive electrode, said negative electrode, and said electrolyte layer are housed, wherein said positive electrode and said negative electrode as a whole contain 0.002% or more by mass and 3.0% or less by mass of lithium carbonate, and wherein said positive electrode and said negative electrode are sintered bodies, which contain neither binders nor conductive assistants. 2. The coin-type lithium secondary cell according to claim 1 , wherein said negative electrode contains a lithium composite oxide. 3. The coin-type lithium secondary cell according to claim 1 , wherein said electrolyte layer includes a ceramic separator, and said positive electrode, said ceramic separator, and said negative electrode are formed into an integral sintered body. 4. The coin-type lithium secondary cell according to claim 1 , wherein said coin-type lithium secondary cell has a thickness of 0.7 to 1.6 mm and a diameter of 10 to 20 mm. 5. The coin-type lithium secondary cell according to claim 1 , wherein said coin-type lithium secondary cell has an energy density of 35 to 200 mWh/cm 3 before reflow soldering. 6. The coin-type lithium secondary cell according to claim 1 , wherein said coin-type lithium secondary cell after reflow soldering has a capacity higher than or equal to 65% of the capacity of said coin-type lithium secondary cell before the reflow soldering.
Assignees
Inventors
Classifications
Separators, membranes or diaphragms characterised by the material · CPC title
Positive electrodes · CPC title
Negative electrodes · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
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- What does patent US12119501B2 cover?
- A coin-type lithium secondary cell for soldering by reflow method includes a positive electrode including a lithium composite oxide, a negative electrode, an electrolyte layer provided between the positive electrode and the negative electrode and including an electrolytic solution, a cell case having an enclosed space in which the positive electrode, the negative electrode, and the electrolyte …
- Who is the assignee on this patent?
- Ngk Insulators Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M50/109. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 15 2024 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).