BATTERY CHARGE EQUALIZATION SYSTEM
First Claim
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1. A battery system comprising:
- n cell groups connected in series to form a battery pack, wherein each cell group includes at least one battery cell; and
charge balancing circuitry including at least n−
1 operational amplifiers each configured as a voltage follower, wherein n is at least 3 and wherein a mth operational amplifier of the n−
1 operational amplifiers is powered by an aggregate voltage of corresponding mth and (m+1)th cells of the n cell groups that are connected in series.
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Abstract
A vehicle having a traction battery power source includes n power cells each having a positive and negative terminal and connected in series to form a power pack, and n−1 comparators configured as voltage followers. A negative terminal of a mth comparator of the n−1 comparators is connected to the negative terminal of a corresponding mth cell of the n cells. And, a positive terminal of the mth comparator is connected to the positive terminal of a (m+1)th cell of the n cells.
19 Citations
20 Claims
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1. A battery system comprising:
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n cell groups connected in series to form a battery pack, wherein each cell group includes at least one battery cell; and charge balancing circuitry including at least n−
1 operational amplifiers each configured as a voltage follower, wherein n is at least 3 and wherein a mth operational amplifier of the n−
1 operational amplifiers is powered by an aggregate voltage of corresponding mth and (m+1)th cells of the n cell groups that are connected in series. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle having a traction battery power source comprising:
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n power cells each having a positive and negative terminal and connected in series to form a power pack; and n−
1 comparators configured as voltage followers, wherein a negative terminal of a mth comparator of the n−
1 comparators is connected to the negative terminal of a corresponding mth cell of the n cells, and a positive terminal of the mth comparator is connected to the positive terminal of a (m+1)th cell of the n cells. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A power storage system comprising:
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n cell groups connected in series to form a power pack, wherein each of the cell groups includes at least one power cell; and charge balancing circuitry including at least n−
1 operational amplifiers each configured as a voltage follower, wherein n is at least 3 and wherein a mth operational amplifier of the at least n−
1 operational amplifiers is powered by an aggregate voltage of corresponding mth and (m+1)th cell groups of the n cells groups connected in series. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification