Charger device for battery supported power supplies
First Claim
1. A charger device, comprising:
- a sensor configured to measure a differential current as a difference between a first current through a first battery portion of a battery and a second current through a second battery portion of the battery, the sensor being configured to provide a current difference signal based on the differential current, wherein the first battery portion and the second battery portion are centrally earthed;
a compensator configured to calculate a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a battery current setpoint; and
a controller configured to control charging or discharging of the first battery portion based on the first current setpoint and of the second battery portion based on the second current setpoint.
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Accused Products
Abstract
The present invention relates to a charger device (100) comprising: a sensor (10) which is configured to measure a differential current (DELTA_I) as a difference between a first current (I_POS) through a first battery portion (210) of a battery (200) and a second current (I_NEG) through a second battery portion (220) of the battery (200) and which is configured to provide a current difference signal (ΔI_meas) based on the measured differential current (DELTA_I); a compensator (20) which is configured to calculate a first current setpoint (I_SP_POS) used for the first battery portion (210) and a second current setpoint (I_SP_NEG) used for the second battery portion (220) based on the provided current difference signal (DELTA_I) and a battery current setpoint (I_SP); and a controller (30) which is configured to control charging and/or discharging of the first battery portion (210) based on the first current setpoint (I_SP_POS) and of the second battery portion (220) based on the second current setpoint (I_SP_NEG).
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Citations
13 Claims
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1. A charger device, comprising:
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a sensor configured to measure a differential current as a difference between a first current through a first battery portion of a battery and a second current through a second battery portion of the battery, the sensor being configured to provide a current difference signal based on the differential current, wherein the first battery portion and the second battery portion are centrally earthed; a compensator configured to calculate a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a battery current setpoint; and a controller configured to control charging or discharging of the first battery portion based on the first current setpoint and of the second battery portion based on the second current setpoint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power supply system, comprising:
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a battery comprising a first battery portion and a second battery portion; and a charger device comprising; a sensor configured to measure a differential current as a difference between a first current through the first battery portion and a second current through the second battery portion, the sensor being configured to provide a current difference signal based on the differential current, wherein the first battery portion and the second battery portion are centrally earthed; a compensator configured to calculate a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a battery current setpoint; and a controller configured to control charging or discharging of the first battery portion based on the first current setpoint and of the second battery portion based on the second current setpoint, wherein the charger device is configured to control charging or discharging of the battery.
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10. A method for charging and discharging a battery, the method comprising:
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measuring a differential current as a difference between a first current through a first battery portion of a battery and a second current through a second battery portion of the battery; providing a current difference signal based on the differential current, wherein the first battery portion and the second battery portion are centrally earthed; calculating a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a batter current setpoint; controlling charging or discharging of the first battery portion based on the first current setpoint; controlling charging or discharging of the second battery portion based on the second current setpoint. - View Dependent Claims (11, 12, 13)
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Specification