Method of controlling battery current limit values
First Claim
1. A method of controlling battery current limiting that controls maximum battery charging and discharging current values according to the state of charge of the battery comprising:
- integrating battery charging and discharging current to compute a first state of charge, and determining first charging and discharging current limit value candidates from that first state of charge;
computing a second state of charge based on battery voltage, and determining second charging and discharging current limit value candidates from that second state of charge; and
taking the smaller charging and discharging current limit value candidates of the first charging and discharging current limit value candidates and the second charging and discharging current limit value candidates as the charging and discharging current limit values for charging and discharging the battery,wherein maximum charging current is reduced for a battery with a high state of charge, and maximum discharging current is reduced for a battery with a low state of charge.
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Abstract
A method of controlling battery current limit values, the method controls maximum charging and discharging current values according to the state of charge of the battery. The method of controlling current limits integrates battery charging and discharging current to compute a first state of charge, determines first charging and discharging current limit value candidates from that first state of charge, computes a second state of charge based on battery voltage, and determines second charging and discharging current limit value candidates from that second state of charge. Further, the method takes the smaller of the first and second charging and discharging current limit value candidates as the charging and discharging current limit values for charging and discharging the battery.
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Citations
19 Claims
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1. A method of controlling battery current limiting that controls maximum battery charging and discharging current values according to the state of charge of the battery comprising:
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integrating battery charging and discharging current to compute a first state of charge, and determining first charging and discharging current limit value candidates from that first state of charge; computing a second state of charge based on battery voltage, and determining second charging and discharging current limit value candidates from that second state of charge; and taking the smaller charging and discharging current limit value candidates of the first charging and discharging current limit value candidates and the second charging and discharging current limit value candidates as the charging and discharging current limit values for charging and discharging the battery, wherein maximum charging current is reduced for a battery with a high state of charge, and maximum discharging current is reduced for a battery with a low state of charge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling battery current limiting that controls maximum battery charging and discharging current values according to the state of charge of the battery comprising:
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integrating battery charging and discharging current to compute a first state of charge, and computing a second state of charge based on battery voltage; determining the maximum charging current value for battery charging based on the larger state of charge between the first state of charge and the second state of charge; and determining the maximum discharging current value for battery discharge based on the smaller state of charge between the first state of charge and the second state of charge, wherein maximum charging current is reduced for a battery with a high state of charge, and maximum discharging current is reduced for a battery with a low state of charge. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification