Systems and methods for state of charge and capacity estimation of a rechargeable battery
First Claim
Patent Images
1. A battery system, comprising:
- a battery configured to couple to an electrical system; and
a battery control module comprising a state of charge (SoC) module and a state of health (SoH) module, wherein the battery control module is configured to electrically couple to the battery, and the battery control module is configured to;
read battery data;
estimate a first state of charge of the battery based at least in part on the battery data using a first method of the SoC module;
calculate a first state of charge error of the battery associated with the estimate of the first state of charge and based on magnitudes of state of charge error sources associated with the first method;
estimate a second state of charge of the battery based at least in part on the battery data using a second method of the SoH module;
calculate a second state of charge error of the battery associated with the estimate of the second state of charge and based on magnitudes of state of charge error sources associated with the second method;
estimate a third state of charge error of the battery based on the first and the second state of charge errors; and
update a state of health estimation of the battery when the third state of charge error of the battery exceeds a predetermined threshold.
7 Assignments
0 Petitions
Accused Products
Abstract
A battery system may include a battery that in operation couples to an electrical system, and a battery control module that in operation electrically couples to the battery. The battery control module may read battery data, estimate a state of charge of the battery based at least in part on the battery data, and estimate a state of charge error of the battery based on magnitudes of state of charge error sources. Additionally, the battery control module may update a state of health estimation of the battery when the state of charge error of the battery exceeds a predetermined threshold.
12 Citations
23 Claims
-
1. A battery system, comprising:
-
a battery configured to couple to an electrical system; and a battery control module comprising a state of charge (SoC) module and a state of health (SoH) module, wherein the battery control module is configured to electrically couple to the battery, and the battery control module is configured to; read battery data; estimate a first state of charge of the battery based at least in part on the battery data using a first method of the SoC module; calculate a first state of charge error of the battery associated with the estimate of the first state of charge and based on magnitudes of state of charge error sources associated with the first method; estimate a second state of charge of the battery based at least in part on the battery data using a second method of the SoH module; calculate a second state of charge error of the battery associated with the estimate of the second state of charge and based on magnitudes of state of charge error sources associated with the second method; estimate a third state of charge error of the battery based on the first and the second state of charge errors; and update a state of health estimation of the battery when the third state of charge error of the battery exceeds a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A tangible, non-transitory computer readable medium of a battery control module configured to store instructions executable by a processor, wherein the instructions cause the processor to:
-
read battery data of a rechargeable battery; estimate a first state of charge of the rechargeable battery based at least in part on the battery data read from the rechargeable battery; determine a first state of charge error of the first state of charge based at least in part on magnitudes of first state of charge error sources; estimate a second state of charge of the rechargeable battery based at least in part on the battery data read from the rechargeable battery, and a state of health of the rechargeable battery; determine a second state of charge error of the second state of charge based at least in part on magnitudes of second state of charge error sources; determine a third state of charge error based on the first state of charge error and the second state of charge error; and update the state of health of the rechargeable battery when the third state of charge error exceeds a predetermined threshold. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
-
20. An energy storage system, comprising:
-
an electrical system of a vehicle or stationary battery; an energy storage component configured to electrically couple to the electrical system of the vehicle or stationary battery; at least one sensor coupled to the energy storage component and configured to collect energy storage component data from the energy storage component; and a battery control module configured to; estimate a first state of charge of the energy storage component based on the energy storage component data collected by the at least one sensor; calculate a first state of charge error of the energy storage component based at least in part on magnitudes of first error sources associated with the first state of charge; estimate a second state of charge of the energy storage component based on the energy storage component data calculated by the at least one sensor; calculate a second state of charge error of the energy storage component based at least in part on magnitudes of second error sources associated with the second state of charge; and update a state of health estimation of the energy storage component when a third state of charge error of the energy storage component exceeds a predetermined threshold, wherein the third state of charge error is calculated based on the first state of charge error and the second state of charge error. - View Dependent Claims (21, 22, 23)
-
Specification