# US 12,113,391 B2 · Power supply controlling system

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- Number: US 12,113,391 B2
- Document ID: US12113391B2
- Status: Granted
- Kind: B2
- Application number: 18/048,700
- Filed: 2022-10-21
- Published: 2023-08-31
- Granted: 2024-10-08
- Earliest claimed: 2022-02-25
- Assignees: Inventec Appliances (Pudong) Corporation; Inventec Appliances Corp.; Inventec Appliances (Shanghai) Co. Ltd.
- Applicants: Inventec Appliances (Pudong) Corporation; Inventec Appliances Corporation; Inventec Appliances (Shanghai) Co. Ltd.
- Inventors: Cheng-Hsien Hsiao; Hsin-Chang Yu; Ming-Tsan Lin
- Web page: https://patentgrep.com/patent/US12113391B2

## CPC

- H02J 7/96: in response to battery voltage
- H02J 1/10: Parallel operation of DC sources
- H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence)
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- H02M 3/155: using semiconductor devices only
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A power supply controlling system is configured to supply power to a load and includes a first power supply device having a first outputting voltage and current to the load, a second power supply device having a second outputting voltage and current to the load, and a buck converter which is selectively connected to the first power supply device or the second power supply device first and is then connected in parallel with the power supply device without converter and the load. The buck converter is selectively connected to the power supply device with a higher voltage, and controls the output voltage of the converter to make it conform to the voltage of the other power supply device, so as to connect the two power supply devices in parallel and output current to the load.

## Claims

### Claim 1

A power supply controlling system for supplying power to a load, the power supply controlling system comprising:
a first power supply device having a first outputting voltage and configured for outputting a first outputting current to the load;
a second power supply device having a second outputting voltage and configured for outputting a second outputting current to the load;
a buck converter selectively connected in parallel with the first power supply device, the second power supply device and the load, the buck converter being configured for selectively adjusting the outputting voltages of the first power supply device and the second power supply device according to the first outputting voltage of the first power supply device, the second outputting voltage of the second power supply device and a load voltage of the load, the buck converter comprising a first adjusting switch, a second adjusting switch and a third adjusting switch, wherein the buck converter is disposed between the first power supply device and the second power supply device, and the second power supply device is disposed between the buck converter and the load; and
a controller connected to the buck converter, the controller being configured for controlling the first adjusting switch, the second adjusting switch and the third adjusting switch of the buck converter to adjust the outputting voltage of at least one of the first power supply device and the second power supply device;
wherein when the first outputting voltage is greater than the second outputting voltage or the second outputting voltage is greater than the first outputting voltage, the buck converter balances the first outputting voltage and the second outputting voltage for the first power supply device and the second power supply device to provide the first outputting current and the second outputting current to the load at the same time;
wherein when the first outputting voltage and the second outputting voltage are the same, the controller controls the first adjusting switch to completely turn on, so as to connect the first power supply device, the second power supply device and the load in parallel.

### Claim 2 (depends on 1)

The power supply controlling system of claim 1, wherein the second adjusting switch and the third adjusting switch respectively are one of a transistor and a diode.

### Claim 3 (depends on 1)

The power supply controlling system of claim 1, wherein the controller is a pulse-width modulation (PWM) controller.

### Claim 4 (depends on 1)

The power supply controlling system of claim 1, wherein when the first outputting voltage of the first power supply device is lower than the load voltage of the load, the controller controls the first adjusting switch and the third adjusting switch to turn off.

### Claim 5 (depends on 1)

The power supply controlling system of claim 1, further comprising a first circuit, a second circuit, a third circuit and a fourth circuit, comprising a first switch, a second switch, a third switch and a fourth switch respectively disposed in the first circuit, the second circuit, the third circuit and the fourth circuit, and comprising a switching controller connected to and controlling the first switch, the second switch, the third switch and the fourth switch, the buck converter being disposed between the first power supply device and the load and between the second power supply device and the load, the first circuit being connected to the first power supply device, the buck converter and the load, the second circuit being connected to the second power supply device and the load, the third circuit being connected to the first power supply device and the load, and the fourth circuit being connected to the second power supply device, the buck converter and the load.

### Claim 6 (depends on 5)

The power supply controlling system of claim 5, wherein when the first outputting voltage is greater than the second outputting voltage, the switching controller controls the first switch and the second switch to turn on, so that the first power supply device outputs the first outputting current through the first circuit, and the second power supply device outputs the second outputting current through the second circuit.

### Claim 7 (depends on 5)

The power supply controlling system of claim 5, wherein when the second outputting voltage is greater than the first outputting voltage, the switching controller controls the third switch and the fourth switch to turn on, so that the first power supply device outputs the first outputting current through the third circuit, and the second power supply device outputs the second outputting current through the fourth circuit.

### Claim 8 (depends on 5)

The power supply controlling system of claim 5, wherein when the first outputting voltage is equal to the second outputting voltage, the switching controller controls the second switch and the third switch to turn on, so that the first power supply device outputs the first outputting current through the third circuit, and the second power supply device outputs the second outputting current through the second circuit.