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Battery phase meter to determine internal temperatures of lithium-ion rechargeable cells under charge and discharge
US8961004B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8961004-B2 |
| Application number | US-201113275664-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 18, 2011 |
| Priority date | Oct 18, 2010 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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Methods and systems to determine an internal temperature of a rechargeable lithium-ion cell based on a phase shift of the cell. Internal cell temperature may be determined with respect to an internal anode temperature and/or an internal cathode temperature. Internal anode temperature may be determined based on a phase shift of a frequency within a range of approximately 40 Hertz (Hz) to 500 Hz. Internal cathode temperature may be determined based on a phase shift of a frequency of up to approximately 30 Hz. A temperature sensor as disclosed herein may be powered by a monitored cell with relatively little impact on cell charge, may be electrically coupled to cell but housed physically separate from the cell, and/or may monitor multiple cells in a multiplex fashion. A rate of change in phase shift may be used to initiate pre-emptive action, without determining corresponding temperatures.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of measuring an internal temperature of a lithium-ion rechargeable cell, comprising: applying an alternating signal to the cell to generate a phase-shifted alternating signal at the cell; detecting the phase shift as a phase difference between a frequency of the applied alternating signal and a frequency of the phase-shifted alternating signal; and determining the internal temperature of the cell based on the phase difference; wherein the appl…
Assignees
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- H01M10/486Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US8961004B2 cover?
- Methods and systems to determine an internal temperature of a rechargeable lithium-ion cell based on a phase shift of the cell. Internal cell temperature may be determined with respect to an internal anode temperature and/or an internal cathode temperature. Internal anode temperature may be determined based on a phase shift of a frequency within a range of approximately 40 Hertz (Hz) to 500 Hz.…
- Who is the assignee on this patent?
- Srinivasan Rengaswamy, Butler Michael H, Carkhuff Bliss G, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification H01M10/486. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 24 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).