Apparatus for managing battery and method thereof
US-2024418786-A1 · Dec 19, 2024 · US
Battery monitor with correction for internal OHMIC measurements of battery cells in parallel connected battery strings
US8933702B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933702-B2 |
| Application number | US-201113106324-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 12, 2011 |
| Priority date | May 14, 2010 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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A battery monitor determines an internal resistance of a battery cell of a battery having parallel connected battery strings which accounts for errors introduced by the parallel connected battery strings. When determining the internal resistance of a battery cell, the battery monitor determines a baseline intercell resistance of an intercell connecting the negative terminal of the battery cell to the positive terminal of an adjacent battery. The battery monitor then applies a momentary load across the battery cell and immediately prior to releasing the load, measures the voltage across the battery cell (loaded voltage) and the voltage across the intercell. The battery monitor then calculates the current flowing through the intercell (intercell current) by dividing the measured voltage across the intercell by the determined intercell resistance. Immediately after releasing the load, the battery monitor measures the voltage across the battery cell (recovered voltage) and determines the battery cell internal resistance by dividing the difference between the recovered voltage and the loaded voltage by the intercell current.
First claim
Opening claim text (preview).
What is claimed is: 1. A system for determining resistance of a battery cell in a battery string, comprising: a voltage sense circuit operable to measure a voltage drop across a first battery cell in a first string of battery cells and to measure a voltage drop across an intercell connection between the first battery cell and a second adjacent battery cell, where a negative terminal of the first battery cell coupled by the intercell connection to a positive terminal of the second…
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Physics · mapped topic
- G01R31/396Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G01R31/3658Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US8933702B2 cover?
- A battery monitor determines an internal resistance of a battery cell of a battery having parallel connected battery strings which accounts for errors introduced by the parallel connected battery strings. When determining the internal resistance of a battery cell, the battery monitor determines a baseline intercell resistance of an intercell connecting the negative terminal of the battery cell …
- Who is the assignee on this patent?
- Deveau Edward W, Bie Xiaoquan, Liebert Corp
- What technology area does this patent fall under?
- Primary CPC classification G01R31/396. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 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).