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Charging control method for secondary cell and charging control device for secondary cell
US9190864B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9190864-B2 |
| Application number | US-201314406652-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 22, 2013 |
| Priority date | Jul 12, 2012 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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Abstract
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A method for controlling charging of a secondary cell including a positive electrode containing a positive-electrode active substance having that increases resistance in accordance with an increase in the SOC, a negative electrode; and a non-aqueous electrolyte includes performing constant-current charging at a set current value to a prescribed upper-limit voltage, performing constant-voltage charging at the upper-limit voltage after the upper-limit voltage V 1 has been reached, and terminating charging of the secondary cell when the charging current in the constant-voltage charging has decreased to a cutoff current value, the cutoff current value being set to a current value that complies with the relationships in formulas (I) and (II): Cutoff current value A 2 ≧set current value A 1 ×X (I) X=(cell resistance R 1 of secondary cell in target SOC [Ω]×set current value A 1 [A])/upper-limit voltage V 1 [V]. (II)
First claim
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The invention claimed is: 1. A method for controlling charging of a secondary cell including a positive electrode containing a positive-electrode active substance having a resistance that increases in accordance with an increase in SOC, a negative electrode, and a non-aqueous electrolyte, the method comprising: performing constant-current charging at a set current value A 1 to a prescribed upper-limit voltage V 1 ; performing constant-voltage charging at the upper-limit volt…
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- What does patent US9190864B2 cover?
- A method for controlling charging of a secondary cell including a positive electrode containing a positive-electrode active substance having that increases resistance in accordance with an increase in the SOC, a negative electrode; and a non-aqueous electrolyte includes performing constant-current charging at a set current value to a prescribed upper-limit voltage, performing constant-voltage c…
- Who is the assignee on this patent?
- Nissan Motor
- What technology area does this patent fall under?
- Primary CPC classification H02J7/94. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 17 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).