Autonomous battery equalization circuit
First Claim
1. A battery equalization circuit for equalizing charge between at least first and second series connected batteries, each battery including a positive end and a negative end, where the positive end of the second battery is coupled to the negative end of the first battery at a common node, the battery equalization circuit comprising:
- a switching circuit connectable to (i) the positive end of the first battery at a positive node, and (ii) the negative end of the second battery at a negative node; and
a resonant circuit connectable between the switching circuit and the common node of the batteries,wherein the switching circuit is adapted to alternately couple the resonant circuit in parallel with the first and second batteries such that a DC current component flows between the first and second batteries through the resonant circuit as a function of a charge imbalance therebetween.
2 Assignments
0 Petitions
Accused Products
Abstract
A battery equalization circuit for equalizing charge between at least first and second series connected batteries includes a switching circuit and a resonant circuit. Each battery has a positive end and a negative end, where the positive end of the second battery is coupled to the negative end of the first battery at a common node. The switching circuit is connectable to (i) the positive end of the first battery at a positive node, and (ii) the negative end of the second battery at a negative node; and the resonant circuit is connectable between the switching circuit and the common node of the batteries, wherein the switching circuit is adapted to alternately couple the resonant circuit in parallel with the first and second batteries such that a DC current component flows between the first and second batteries through the resonant circuit as a function of a charge imbalance therebetween.
-
Citations
36 Claims
-
1. A battery equalization circuit for equalizing charge between at least first and second series connected batteries, each battery including a positive end and a negative end, where the positive end of the second battery is coupled to the negative end of the first battery at a common node, the battery equalization circuit comprising:
-
a switching circuit connectable to (i) the positive end of the first battery at a positive node, and (ii) the negative end of the second battery at a negative node; and a resonant circuit connectable between the switching circuit and the common node of the batteries, wherein the switching circuit is adapted to alternately couple the resonant circuit in parallel with the first and second batteries such that a DC current component flows between the first and second batteries through the resonant circuit as a function of a charge imbalance therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A battery equalization circuit for equalizing charge between at least first and second series connected battery cells, each battery cell including a positive end and a negative end, where the positive end of the second battery cell is coupled to the negative end of the first battery cell at a common node, the battery equalization circuit comprising:
-
a switching circuit connectable to (i) the positive end of the first battery cell at a positive node, and (ii) the negative end of the second battery cell at a negative node; and a resonant circuit connectable between the switching circuit and the common node of the battery cells, wherein the switching circuit is adapted to alternately couple the resonant circuit in parallel with the first and second battery cells such that a DC current component flows between the first and second battery cells through the resonant circuit as a function of a charge imbalance therebetween. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
Specification