Battery electric system with alternating current self-heating mode
US-2024429481-A1 · Dec 26, 2024 · US
Secondary battery system
US8994322B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994322-B2 |
| Application number | US-201213535410-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 28, 2012 |
| Priority date | Jun 29, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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Since in existent charge-discharge control the battery direct current resistance of a lithium ion battery increases at a low temperature or in a low SOC, the battery voltage may possibly exceed greatly the maximum allowable voltage instantaneously due to over-voltage during charging or may possibly decrease greatly to less than the minimum allowable voltage during discharging. If the lithium ion battery continuously lies in such a state the battery performance is degraded abruptly. The battery resistance of a lithium ion battery module is estimated in accordance with SOC and temperature of the lithium ion battery module, and current to charge is set properly based on the estimated battery resistance.
First claim
Opening claim text (preview).
What is claimed is: 1. A secondary battery system comprising: a battery module having at least one lithium ion battery; a measuring device for measuring a voltage and a temperature of the battery module; a state of charge detection device for detecting a state of charge based on the voltage; and a charge-discharge control device; wherein an estimated battery resistance of the battery module, corresponding to the state of charge and the temperature of the battery module, is…
Assignees
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H01M10/425Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8994322B2 cover?
- Since in existent charge-discharge control the battery direct current resistance of a lithium ion battery increases at a low temperature or in a low SOC, the battery voltage may possibly exceed greatly the maximum allowable voltage instantaneously due to over-voltage during charging or may possibly decrease greatly to less than the minimum allowable voltage during discharging. If the lithium io…
- Who is the assignee on this patent?
- Sasaki Hironori, Yamamoto Tsunenori, Hitachi Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M10/425. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 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).