Granted Patent
B2
US 12,249,694 · App. 17/930,792 · Granted Mar 11, 2025
Battery adaptive charging
Inventors:
Dania Ghantous (Walnut Creek, CA); Fred Berkowitz (Los Gatos, CA); Nadim Maluf (Los Altos, CA); Christina Peabody (Fremont, CA)
Assignee:
Qnovo Inc.
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Abstract
Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and/or frequency domains. These systems may be additionally responsible for charging and/or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and/or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.
Claims (26)
1. A method to determine a state of health of a battery and charge the battery via charging circuitry, wherein the battery includes at least two terminals, the method comprising:
(a) applying an electrical signal to at least two terminals of the battery;
(b) from the battery's response to the electrical signal, determining a change over a plurality of charge-discharge cycles, as the battery ages, degrades or deteriorates, in (i) an available stored charge in the battery for a given measured voltage, or (ii) a maximum amount of charge that is capable of being stored in the battery; and
(c) based at least in part on the available stored charge or the maximum amount of charge as determined in (b), adjusting one or more characteristics of a charging process for the battery.
2. The method of claim 1 , wherein adjusting one or more characteristics of a charging process for the battery comprises adjusting a charge current applied to the battery during a charging process for the battery.
3. The method of claim 1 , wherein determining the change, as the battery ages, degrades or deteriorates, in the available stored charge in the battery for a given measured voltage comprises determining a change in a voltage-charge curve for the battery.
4. The method of claim 1 , wherein determining the change, as the battery ages, degrades or deteriorates, in the maximum amount of charge is capable of being stored in the battery for a given measured voltage comprises determining a shift in a voltage-charge curve or relationship with repeated charge-discharge cycles of the battery.
5. The method of claim 1 , wherein determining the change, as the battery ages, degrades or deteriorates, in the available stored charge in the battery for a given measured voltage comprises determining that the battery has less available stored charge for a defined voltage.
6. The method of claim 1 , wherein determining the change, as the battery ages, degrades or deteriorates, in the available stored charge in the battery for a given measured voltage comprises determining an impedance and/or a change in impedance of the battery.
7. The method of claim 1 , wherein adjusting one or more characteristics of a charging process for the battery comprises changing an amplitude and/or duration of a charge current applied to the battery during the charging process.
8. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises lowering current applied to the battery during the charging process.
9. The method of claim 1 , wherein adjusting one or more characteristics of a charging process for the battery comprises adjusting a peak charging current.
10. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises applying a plurality of charge signals that decrease in magnitude over time.
11. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises applying a plurality of charge steps that decrease in magnitude over time.
12. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises adjusting the charging process to reduce a terminal voltage of the battery, during the charging process, to a level below a predetermined value and/or a predetermined range.
13. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises adjusting a predetermined value and/or a predetermined range associated with charging the battery.
14. The method of claim 13 , wherein the predetermined value and/or a predetermined range characterizes an overpotential of the battery, a relaxation time of the battery, and/or a partial relaxation time of the battery.
15. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises controlling, managing, and/or reducing a relaxation time of the battery.
16. The method of claim 1 , wherein one or more characteristics of a charging process for the battery comprises changing one or more characteristics of the charging process over time or use of the battery.
17. The method of claim 1 , wherein the battery comprises a plurality of cells.
18. A system for charging a battery including at least two terminals, the system comprising:
charging and/or monitoring circuitry designed or configured to apply a charge signal to the battery; and
control circuitry, coupled to the charging and/or monitoring circuitry designed or configured to cause the system to:
(a) apply an electrical signal to at least two terminals of the battery;
(b) from the battery's response to the electrical signal, determine a change over a plurality of charge-discharge cycles, as the battery ages, degrades or deteriorates, in (i) an available stored charge in the battery for a given measured voltage, or (ii) a maximum amount of charge that is capable of being stored in the battery; and
(c) based at least in part on the available stored charge or the maximum amount of charge as determined in (b), adjust one or more characteristics of a charging process for the battery.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Jan 31, 2025
From: GHANTOUS, DANIA; BERKOWITZ, FRED; MALUF, NADIM; PEABODY, CHRISTINA
To: QNOVO INC.
Reel/Frame 070068/0920 →
Continuity (14)
Continuation In Part
16107560
· Aug 21, 2018
Continuation
14003826
Provisional Application
61468051
· Mar 27, 2011
Provisional Application
61439400
· Feb 4, 2011
Provisional Application
61368158
· Jul 27, 2010
Provisional Application
61358384
· Jun 24, 2010
Provisional Application
61346953
· May 21, 2010
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