Method For Detecting Cell State-Of-Charge and State-Of-Discharge Divergence Of A Series String of Batteries Or Capacitors
First Claim
Patent Images
1. A system for charging a battery comprising:
- a battery pack having at least two lithium ion cells;
a controller that detects a rate of change of voltage with respect to a state of charge (dV/dSOC) of the battery pack based on a calculated dV/dSOC that represents the battery pack as a whole, without calculating dV/dSOC individually on a cell-by-cell basis;
wherein charging is terminated when dV/dSOC reaches a predetermined value.
7 Assignments
0 Petitions
Accused Products
Abstract
A system for charging a battery includes a battery pack having at least two lithium ion cells. A controller detects a rate of change of voltage with respect to a state of charge (dV/dSOC) of the battery pack based on a calculated dV/dSOC that represents the battery pack as a whole, without calculating dV/dSOC individually on a cell-by-cell basis. Charging is terminated when dV/dSOC reaches a predetermined value.
-
Citations
23 Claims
-
1. A system for charging a battery comprising:
-
a battery pack having at least two lithium ion cells; a controller that detects a rate of change of voltage with respect to a state of charge (dV/dSOC) of the battery pack based on a calculated dV/dSOC that represents the battery pack as a whole, without calculating dV/dSOC individually on a cell-by-cell basis; wherein charging is terminated when dV/dSOC reaches a predetermined value. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
-
-
2. The system of claim 2, wherein the battery pack consists of at least two lithium ion cells connected in series.
-
11. A battery charger, comprising:
-
a battery pack comprising lithium ion cells; a circuit which determines a rate of change of voltage of the battery pack with respect to a state of charge (dV/dSOC) of the battery pack based on a calculation of the dV/dSOC that represents the battery pack as a whole, without individually calculating dV/dSOC on a cell by cell basis; and wherein charging of a battery pack is terminated when a predetermined dV/dSOC has been reached. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A method of charging a battery pack, comprising:
-
providing a battery pack of at least two or more lithium ion battery cells; detecting the rate of change of voltage with respect to the state of charge (dV/dSOC) based on a calculated dV/dSOC that represents the battery pack as a whole, without individually detecting dV/dSOC on a cell by cell basis; comparing the detected dV/dSOC with a predetermined dV/dSOC associated with the battery pack; and terminating the charging of battery pack based on the comparison. - View Dependent Claims (21, 22, 23)
-
Specification