State Of Battery Health Estimation Based On Swelling Characteristics
US-2021197691-A1 · Jul 1, 2021 · US
Low voltage battery SOC confirmation and cell balancing
US11577624B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11577624-B2 |
| Application number | US-202016893948-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 5, 2020 |
| Priority date | Jun 5, 2019 |
| Publication date | Feb 14, 2023 |
| Grant date | Feb 14, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A battery system includes at least one battery including a plurality of cells and a hybrid control module configured to monitor a differential capacity of the at least one battery, determine when the monitored differential capacity of the at least one battery corresponds to a predetermined differential capacity of the at least one battery, and determine a state of charge of the battery in response to the determination that the monitored differential capacity corresponds to the predetermined differential capacity.
First claim
Opening claim text (preview).
What is claimed is: 1. A battery system, comprising: at least one battery including a plurality of cells; and a hybrid control module configured to monitor a differential capacity of the at least one battery, determine when the monitored differential capacity of the at least one battery corresponds to a predetermined differential capacity of the at least one battery, and determine a state of charge of the battery in response to the determination that the monitored differential capacity corresponds to the predetermined differential capacity, wherein determining the state of charge of the battery includes (i) identifying an inflection point in a voltage profile of the at least one battery, wherein the inflection point corresponds to a transition between a non-flat region and a generally flat region in the voltage profile, and (ii) indexing the identified inflection point to the state of charge of the battery. 2. The battery system of claim 1 , wherein, in the generally flat region, an open circuit voltage of the battery varies by less than 100 mV and the state of charge varies by at least 50%. 3. The battery system of claim 1 , wherein the hybrid control module is further configured to: determine when the monitored differential capacity of the at least one battery corresponds to a second predetermined differential capacity of the at least one battery, wherein the predetermined differential capacity corresponds to a first inflection point in the voltage profile of the at least one battery and the second predetermined differential capacity corresponds to a second inflection point in the voltage profile of the at least one battery; and calculate an energy of the battery between the first inflection point and the second inflection point. 4. The battery system of claim 3 , wherein the hybrid control module is further configured to calculate at least one of a state of health of the battery and a remaining life of the battery based on the calculated energy. 5. A vehicle comprising the battery system of claim 1 .
Assignees
Inventors
Classifications
the cycle being controlled or terminated in response to electric parameters · CPC title
Hybrid vehicles · CPC title
Energy storage systems for electromobility, e.g. batteries · CPC title
Switching between serial connection and parallel connection of battery modules · CPC title
Balancing the charge of battery modules · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11577624B2 cover?
- A battery system includes at least one battery including a plurality of cells and a hybrid control module configured to monitor a differential capacity of the at least one battery, determine when the monitored differential capacity of the at least one battery corresponds to a predetermined differential capacity of the at least one battery, and determine a state of charge of the battery in respo…
- Who is the assignee on this patent?
- Gm Global Tech Operations Llc
- What technology area does this patent fall under?
- Primary CPC classification B60L58/15. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 14 2023 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).