Granted Patent
B2
US 12,646,758 · App. 18/670,437 · Granted Jun 2, 2026
Battery adaptive charging using battery physical phenomena
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 (30)
1 . A method of adaptively charging a battery, the method comprising:
(a) measuring a voltage across terminals of the battery;
(b) based on the voltage across the terminals of the battery, determining an overpotential of the battery, wherein the overpotential characterizes voltage changes during a relaxation period;
(c) determining a state of charge of the battery; and
(d) based on the overpotential and the state of charge of the battery, adapting a charging process of the battery.
2 . The method of claim 1 , wherein determining the state of charge comprises employing a correlation of the overpotential and the state of charge.
3 . The method of claim 1 , wherein determining the state of charge comprises employing a look up table that correlates the overpotential and the state of charge of the battery.
4 . The method of claim 1 , further comprising determining an open circuit voltage of a cell.
5 . The method of claim 1 , further comprising determining a charge pulse voltage from the measured voltage across terminals of the battery.
6 . The method of claim 1 , further comprising determining a partial relaxation time from the measured voltage across terminals of the battery.
7 . The method of claim 1 , wherein adapting the charging process of the battery comprises adjusting a charging current to preserve a cycle life of the battery.
8 . The method of claim 1 , further comprising conducting a first portion of the charging process prior to (a), wherein adapting the charging process of the battery comprises modifying a charge signal applied to the battery.
9 . The method of claim 8 , wherein modifying the charge signal applied to the battery comprises modifying one or more current steps or current pulses that are used in the charging process.
10 . The method of claim 1 , further comprising determining a state of health of the battery from the overpotential of the battery.
11 . The method of claim 10 , further comprising using the state of health of the battery to determine how to adapt the charging process of the battery.
12 . A system comprising:
charging and/or monitoring circuitry designed or configured to perform a charging process on a battery; and
control circuitry, coupled to the charging and/or monitoring circuitry designed or configured to cause the system to:
(a) measure a voltage across terminals of the battery,
(b) based on the voltage across the terminals of the battery, determine an overpotential of the battery, wherein the overpotential characterizes voltage changes during a relaxation period,
(c) determine a state of charge of the battery, and
(d) based on the overpotential and the state of charge of the battery, adapt the charging process of the battery.
13 . The system of claim 12 , wherein the control circuitry is designed or configured to cause the system to adapt the charging process of the battery in (d) by causing the system to modify a charge signal applied to the battery, and wherein the control circuitry is further designed or configured to cause the system to conduct a first portion of the charging process prior to (a).
14 . The system of claim 13 , wherein the control circuitry is designed or configured to cause the system to modify the charge signal applied to the battery by causing the system to modify one or more current steps or current pulses that are used in the charging process.
15 . The system of claim 12 , wherein the control circuitry is designed or configured to determine the state of charge by employing a correlation of the overpotential and the state of charge.
16 . The system of claim 12 , wherein the control circuitry is designed or configured to determine the state of charge by employing a look up table that correlates the overpotential and the state of charge of the battery.
17 . The system of claim 12 , wherein the control circuitry is designed or configured to determine an open circuit voltage of a cell.
18 . The system of claim 12 , wherein the control circuitry is designed or configured to adapt the charging process of the battery by adjusting a charging current to preserve a cycle life of the battery.
19 . The system of claim 12 , wherein the control circuitry is designed or configured to (i) conduct a first portion of the charging process prior to (a), and (ii) modify one or more current steps or current pulses that are used in the charging process.
20 . The system of claim 12 , wherein the control circuitry is designed or configured to determine a state of health of the battery from the overpotential of the battery and use the state of health of the battery to determine how to adapt the charging process of the battery.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Mar 11, 2026
From: BERKOWITZ, FRED; GHANTOUS, DANIA; MALUF, NADIM
To: QNOVO INC.
Reel/Frame 074049/0029 →
Continuity (15)
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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