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US 2018/0123491 A1Published application
Load drive current control method and system
AssigneeLG Chem, Ltd.
InventorsYong Min Jo, Ju Young Sun
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a battery load drive system, and more particularly, to a battery load drive system for preparing for a surge current generated by a capacitor when a battery is coupled to a battery using a path for reducing current additionally provided in an existing path.
Claims12
A method of controlling a drive current supplied to a load by using a battery, the method comprising:
- an initial Pulse Width Modulation (PWM) signal output operation for outputting an initial PWM signal having a predetermined initial duty ratio as a switching control signal of a switch for turning on/off a current flow between the load and the battery to supply a current to the load;
- and
- a voltage measurement operation for measuring a load voltage of the load where the current is supplied according to the initial PWM signal outputted from the initial PWM signal output operation and a battery voltage of the battery;
- a voltage difference calculation operation for calculating a difference between the battery voltage and the load voltage measured in the voltage measurement operation;
- a switch on operation for turning on the switch when the difference between the battery voltage and the load voltage measured in the voltage measurement operation is less than a predetermined reference value;
- and
- a correction PWM signal output operation for increasing a duty ratio or a period of the initial PWM signal to output the increased one as an on/off control signal of the switch when the difference between the battery voltage and the load voltage measured in the voltage measurement operation is greater than the predetermined reference value.
4 more elements
A system for controlling a drive current supplied to a load by using a battery, the system comprising:
- a battery configured to be a current source;
- a control unit configured to output a PWM signal having a predetermined duty ratio according to a voltage difference between the battery and the load;
- and
- a discharge switching unit configured to turn on/off a current flowing from the battery to the load based on the duty ratio of the PWM signal outputted from the control unit.
1 more element
Dependencies are inferred from the claim text.