Battery charging coaction and output system with current limit supply
OwnerTai-Her Yanginventor
Life of this patent
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Abstract
The present invention relates to a power system utilizing an engine generator or public power with AC source, wherein the power system particularly has the characteristics that the maximum output current thereof is limited by electromagnetic effects, and/or constant current or nearly constant current output thereof is set to be lower than the maximum output current, for powering a load, and charging a battery, or jointly powering a load with a battery; when an engine generator set is utilized to be power supply, during operation, the engine operates with the best brake specific fuel consumption and/or the range of revolutions and torque for better energy saving.
Claims24
A battery charging coaction and output system with current limited power supply, comprising:
- a battery (BAT 101) capable of repeated charging and discharging;
- and an auxiliary power supply (PS 100) connected to supply charging current to the battery (BAT101) and further connected to supply load current to the load, wherein said auxiliary power supply (PS 100) and battery (BAT 101) are thereby connected to selectively supply power to the load both individually and jointly, wherein an output current of the auxiliary power supply (PS 100) is limited, wherein a load current supplied to the load is a sum of the limited output current of the auxiliary power supply and a discharge output current of the battery, which varies dependent on the load such that:
- if the load current is smaller than a rated maximum output current of the auxiliary power supply (PS 100), the auxiliary power supply (PS 100) supplies all of the load current directly to the load, and further supplies a difference between the load current and the current limited output current to charge the battery (BAT100);
- if the load current is larger than a rated maximum output current of the auxiliary power supply (PS 100), the auxiliary power supply (PS 100) supplies all of the current limited output current to the load and a difference between the load current and the current limited output current is supplied to the load by the battery (BAT100), and
- wherein the auxiliary power supply (PS100) includes one of:
- (i) a generator (G101) driven by an engine (ICE101) and (ii) at least one rectifier for converting an AC line current into a DC auxiliary power supply output, and wherein the system is controlled as a function of battery saturation according to the following modes:
- (a) when the system is not actuated to drive a load and the battery saturation status drops to a level below a prescribed threshold, an engine startup motor (M100) is activated to cause the engine (ICE t 01) to drive the generator (G 101) to charge the battery or the battery is charged by the DC converted AC line current, said charging by the generator (G101) or DC converted AC line current being suspended when the battery reaches saturation;
- (b) to drive a load, a saturation status of the battery is compared by a central control unit (CCU101) to that of an operation model and the generator (G101) is controlled or the DC converted AC line current is regulated to deliver an output having a constant or controlled current or power such that once the power required by the load exceeds that supplied by the auxiliary power supply (PS100), power to the load is supplied jointly by the auxiliary power supply (PS100) and the battery (BAT101), and when the power required by the load is less than that supplied by the auxiliary power supply (PS100), the auxiliary power supply (PS 100) supplies power to the load and charging current to the battery until the power requirements of the load exceed a power rating of the auxiliary power supply (PS100), which case the system shifts to mode (c), as follows:
- (c) when the power requirements of the load exceed a power rating of the auxiliary power supply (PS100), the battery (BAT101) and the auxiliary power supply (PS100) jointly supply power to the load with a proportion of power supplied by the auxiliary power supply (PS 100) and battery (BAT101) depending on a saturation state of the battery (BAT101), wherein the system switches to mode (b) when the power requirements of the load drop below the power rating of the auxiliary power supply (PS 100);
- (d) when the load is driven solely by the battery (BAT101) power supplied to the load is monitored and, when the power supplied to the load exceeds a set value or extends beyond a set time, the auxiliary power supply (PS 100) supplies a constant or controlled current output to jointly drive the load with the battery (BAT101) in accordance with said operation mode.
Dependencies are inferred from the claim text.