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US 12,374,913 B2Granted
Charge/discharge management in electrochemical cells, including partial cycle control
AssigneeSion Power Corporation
InventorsYuriy V. Mikhaylik, Chariclea Scordilis-Kelley
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Abstract
Electrochemical cell and battery management systems are generally provided. The systems can comprise an electrochemical cell and a controller. In some cases, the controller can be used to control various aspects of the charge and/or discharge of the electrochemical cell. In some cases, the system can comprise one or more strings of cells.
Claims14
An electrochemical cell management system comprising:
- an electrochemical cell;
- and
- at least one controller configured to:
- control the cell such that the cell is charged over a first state of charge range having breadth of at least 20%,
- wherein an average charging rate over a first portion of the first state of charge range is lower than an average charging rate over a second portion of the first state of charge range,
- wherein the first portion spans at least 2% of the first state of charge range and the second portion spans at least 2% of the first state of charge range,
- wherein the first portion occurs before the second portion, and
- wherein the at least one controller is configured to:
- control the cell such that the cell is discharged over a second state of charge range having breadth of at least 2% and at most 90%, and then discharged over a third state of charge range having breadth of at least 2%,
- wherein an average discharging rate over the second state of charge range is at least 2 times an average discharging rate over the third state of charge range.
7 more elements
An electrochemical cell management system comprising:
- an electrochemical cell;
- and
- at least one controller configured to:
- control the cell such that the cell is charged over a first state of charge range having breadth of at least 2% and at most 90%, and then charged over a second state of charge range,
- wherein an average charging rate over the first state of charge range is at most 0.5 times an average charging rate over the second state of charge range,
- wherein the at least one controller is configured to:
- control the cell such that the cell is discharged over a third state of charge range having breadth of at least 2% and at most 90%, and then discharged over a fourth state of charge range having breadth of at least 2%,
- wherein an average discharging rate over the third state of charge range is at least 2 times an average discharging rate over the fourth state of charge range.
5 more elements
An electrochemical cell management system comprising:
- an electrochemical cell;
- and
- at least one controller configured to:
- control the cell such that the cell is charged over a first state of charge range having breadth of at least 20%,
- wherein an average charging rate over a first portion of the first state of charge range is lower than an average charging rate over a second portion of the first state of charge range,
- wherein the first portion spans at least 2% of the first state of charge range and the second portion spans at least 2% of the first state of charge range,
- wherein the first portion occurs before the second portion, and
- wherein the at least one controller is configured to:
- control the cell such that the cell is discharged over a second state of charge range having breadth of at least 2% and at most 90%, then discharged over a third state of charge range having breadth of at least 2%, and then discharged over a fourth state of charge range having breadth of at least 2%,
- wherein an average discharging rate over the second state of charge range is higher than an average discharging rate over the third state of charge range, and
- wherein the average discharging rate over the third state of charge range is higher than an average discharging rate over the fourth state of charge range.
8 more elements
An electrochemical cell management system comprising:
- an electrochemical cell;
- and
- at least one controller configured to:
- control the cell such that the cell is charged over a first state of charge range having breadth of at least 2% and at most 90%, and then charged over a second state of charge range,
- wherein an average charging rate over the first state of charge range is at most 0.5 times an average charging rate over the second state of charge range, and
- wherein the at least one controller is configured to:
- control the cell such that the cell is discharged over a fourth state of charge range having breadth of at least 2% and at most 90%, and then discharged over a fifth state of charge range having breadth of at least 2%,
- wherein an average discharging rate over the fourth state of charge range is at least 2 times an average discharging rate over the fifth state of charge range.
5 more elements
An electrochemical cell management method comprising:
- controlling an electrochemical cell such that the cell is charged over a first state of charge range having breadth of at least 20%,
- wherein an average charging rate over a first portion of the first state of charge range is lower than an average charging rate over a second portion of the first state of charge range,
- wherein the first portion spans at least 2% of the first state of charge range and the second portion spans at least 2% of the first state of charge range,
- wherein the first portion occurs before the second portion,
- wherein the method comprises controlling the cell such that the cell is discharged over a second state of charge range having breadth of at least 2% and at most 90%, and then discharged over a third state of charge range having breadth of at least 2%, and
- wherein an average discharging rate over the second state of charge range is at least 2 times an average discharging rate over the third state of charge range.
3 more elements
An electrochemical cell management method comprising:
- controlling an electrochemical cell such that the cell is charged over a first state of charge range having breadth of at least 2% and at most 90%, and then charged over a second state of charge range,
- wherein an average charging rate over the first state of charge range is at most 0.5 times an average charging rate over the second state of charge range,
- wherein the method comprises controlling the cell such that the cell is discharged over a third state of charge range having breadth of at least 2% and at most 90%, and then discharged over a fourth state of charge range having breadth of at least 2%, and
- wherein an average discharging rate over the third state of charge range is at least 2 times an average discharging rate over the fourth state of charge range.
1 more element
An electrochemical cell management method, comprising:
- controlling an electrochemical cell such that the cell is charged over a first state of charge range having breadth of at least 20%,
- wherein an average charging rate over a first portion of the first state of charge range is lower than an average charging rate over a second portion of the first state of charge range,
- wherein the first portion spans at least 2% of the first state of charge range and the second portion spans at least 2% of the first state of charge range,
- wherein the first portion occurs before the second portion,
- wherein the method comprises controlling the cell such that the cell is discharged over a second state of charge range having breadth of at least 2% and at most 90%, then discharged over a third state of charge range having breadth of at least 2%, and then discharged over a fourth state of charge range having breadth of at least 2%,
- wherein an average discharging rate over the second state of charge range is higher than an average discharging rate over the third state of charge range, and
- wherein the average discharging rate over the third state of charge range is higher than an average discharging rate over the fourth state of charge range.
4 more elements
An electrochemical cell management method, comprising:
- controlling an electrochemical cell such that the cell is charged over a first state of charge range having breadth of at least 2% and at most 90%, and then charged over a second state of charge range,
- wherein an average charging rate over the first state of charge range is at most 0.5 times an average charging rate over the second state of charge range, and
- controlling the cell such that the cell is discharged over a fourth state of charge range having breadth of at least 2% and at most 90%, and then discharged over a fifth state of charge range having breadth of at least 2%,
- wherein an average discharging rate over the fourth state of charge range is at least 2 times an average discharging rate over the fifth state of charge range.
1 more element
Dependencies are inferred from the claim text.