Battery protection circuitry for limiting charging parameters of a battery plant
First Claim
1. In a circuit for charging a battery, a control circuit, comprising:
- means for applying a DC voltage to the battery; and
means for controlling the DC voltage and a charging current applied to the battery, including;
a resistive device connected to a battery terminal to limit charging current applied to the battery despite degeneration of internal battery resistance; and
means for further limiting charging current in response to a measured temperature related to the resistive device.
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Accused Products
Abstract
In an arrangement for charging a battery in a battery plant, a resistive network is situated in the charging path of a battery being charged to guarantee a minimum total resistance of the added resistance and the battery'"'"'s internal resistance regardless of the thermal effect of reducing the battery'"'"'s internal resistance. A diode path bypasses the resistive network during discharging of the battery to reduce power dissipation. Charging current is controlled in response to a temperature of a heat sink on which the resistive network is mounted. Ambient temperature is used as a control or in another arrangement as a controlling factor in controlling charging current. Battery temperature may also be used as a control or in another arrangement as a controlling factor in controlling charging current.
28 Citations
20 Claims
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1. In a circuit for charging a battery, a control circuit, comprising:
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means for applying a DC voltage to the battery; and means for controlling the DC voltage and a charging current applied to the battery, including; a resistive device connected to a battery terminal to limit charging current applied to the battery despite degeneration of internal battery resistance; and means for further limiting charging current in response to a measured temperature related to the resistive device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a battery plant having a battery floated across rails coupling an input rectifier to a load, an impedance network, comprising:
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a first impedance element coupled to the battery; and a second impedance element, coupled to the first impedance element, that provides a variable impedance in response to a characteristic of the battery plant, the first and second impedance elements cooperating to limit a charging current to the battery. - View Dependent Claims (16, 17)
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18. In a battery plant that includes a battery and an impedance element floated across rails coupling an input rectifier to a load, the battery plant further including a discharge path that bypasses the impedance element to conduct a discharge current from the battery, a circuit for monitoring a charge of the battery, comprising:
a controller that monitors a characteristic of the battery plant and provides a signal to the battery to regulate a charge thereacross. - View Dependent Claims (19, 20)
Specification