# US 11,309,592 B2 · Load power supply circuit and terminal

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- Number: US 11,309,592 B2
- Document ID: US11309592B2
- Status: Granted
- Kind: B2
- Application number: 16/085,883
- Filed: 2016-03-25
- Published: 2019-04-18
- Granted: 2022-04-19
- Earliest claimed: 2016-03-25
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Guanghua Zhong; Yuanguo Wang; Ming Zhang
- Web page: https://patentgrep.com/patent/US11309592B2

## CPC

- G05F 1/577: for plural loads
- H01M 10/4207: {for several batteries or cells simultaneously or sequentially}
- H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H02J 7/64: against overvoltage
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M 3/135: using semiconductor devices only
- H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators
- H02M 3/33515: {with digital control}
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- H02M 1/0087: {adapted for receiving as input a current source}
- Y02E 60/10: Energy storage using batteries
- G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Embodiments of the present invention relate to the battery monitoring field, and provide a load power supply circuit and a terminal. The load power supply circuit includes a charging manager and a step-up circuit. The charging manager includes a first pin, a second pin, and a third pin. The first pin of the charging manager is electrically connected to a load, and the second pin of the charging manager is electrically connected to a battery. The step-up circuit includes a first end, a second end, and a control end. The first end of the step-up circuit is electrically connected to the load, the second end of the step-up circuit is electrically connected to the battery, and the control end of the step-up circuit is electrically connected to the third pin of the charging manager.

## Claims

### Claim 1

A load power supply circuit comprising:
a charging manager that is integrated into a single circuit chip and that comprises a first pin, a second pin, a third pin, a logic control circuit, and a switch element, wherein:
the first pin of the charging manager is electrically connected to a load and the second pin of the charging manager is electrically connected to a battery;
the logic control circuit comprises a first output end and a second output end;
the switch element is a metal insulator semiconductor (MOS) transistor that comprises a first end, a second end, and a control end, wherein a gate of the MOS transistor is the control end of the switch element, a source of the MOS transistor is the second end of the switch element, and a drain of the MOS transistor is the first end of the switch element;
the first end of the switch element is electrically connected to the first pin of the charging manager, the second end of the switch element is electrically connected to the second pin of the charging manager, and the control end of the switch element is electrically connected to the first output end of the logic control circuit; and
the second output end of the logic control circuit is electrically connected to the third pin of the charging manager; and
a step-up circuit that comprises a first end, a second end, and a control end, the first end of the step-up circuit is electrically connected to the load, the second end of the step-up circuit is electrically connected to the battery, and the control end of the step-up circuit is electrically connected to the third pin of the charging manager; wherein:
when the charging manager is not electrically connected to an external power supply and when a voltage of the battery is greater than a first threshold, the logic control circuit controls the control end of the switch element to connect the first end and the second end of the switch element, the logic control circuit controls the control end of the step-up circuit to disconnect the step-up circuit, and the battery supplies power to the load by using the switch element in the charging manager;
when the charging manager is not electrically connected to the external power supply and when the voltage of the battery is less than a second threshold, the logic control circuit controls the control end of the switch element to disconnect the first end and the second end of the switch element, the logic control circuit controls the control end of the step-up circuit to connect the step-up circuit, and the battery supplies power to the load by using the step-up circuit, wherein the second threshold is less than or equal to the first threshold; and
the step-up circuit and the switch element of the charging manager are electrically connected in parallel.

### Claim 2 (depends on 1)

The load power supply circuit according to claim 1, wherein when the charging manager is electrically connected to the external power supply, the external power supply supplies power to the load by using the charging manager, the logic control circuit controls the control end of the switch element to connect the first end and the second end of the switch element, and the external power supply charges the battery by using the switch element.

### Claim 3 (depends on 1)

The load power supply circuit according to claim 1, wherein when the charging manager is electrically connected to the external power supply and the voltage of the battery is greater than a third threshold, the external power supply supplies power to the load by using the charging manager, and the logic control circuit controls the control end of the switch element to disconnect the first end and the second end of the switch element, wherein the third threshold is greater than the first threshold.

### Claim 4 (depends on 1)

The load power supply circuit according to claim 1, wherein the logic control circuit further comprises an input end, and the logic control circuit obtains the voltage of the battery by using the input end.

### Claim 5 (depends on 1)

The load power supply circuit according to claim 1, wherein the charging manager and the step-up circuit are integrated into the single circuit chip.

### Claim 6

A terminal, comprising:
a load;
a load power supply circuit that comprises a charging manager and a step-up circuit;
a battery that supplies power to the load by using the load power supply circuit;
the charging manager is integrated into a single circuit chip and comprises a first pin, a second pin, a third pin, a logic control circuit, and a switch element, wherein:
the first pin of the charging manager is electrically connected to the load and the second pin of the charging manager is electrically connected to the battery;
the logic control circuit comprises a first output end and a second output end;
the switch element is a metal insulator semiconductor (MOS) transistor that comprises a first end, a second end, and a control end, wherein a gate of the MOS transistor is the control end of the switch element, a source of the MOS transistor is the second end of the switch element, and a drain of the MOS transistor is the first end of the switch element;
the first end of the switch element is electrically connected to the first pin of the charging manager, the second end of the switch element is electrically connected to the second pin of the charging manager, and the control end of the switch element is electrically connected to the first output end of the logic control circuit; and
the second output end of the logic control circuit is electrically connected to the third pin of the charging manager; and
the step-up circuit comprises a first end, a second end, and a control end, the first end of the step-up circuit is electrically connected to the load, the second end of the step-up circuit is electrically connected to the battery, and the control end of the step-up circuit is electrically connected to the third pin of the charging manager; wherein:
when the charging manager is not electrically connected to an external power supply and when a voltage of the battery is greater than a first threshold, the logic control circuit controls the control end of the switch element to connect the first end and the second end of the switch element, the logic control circuit controls the control end of the step-up circuit to disconnect the step-up circuit, and the battery supplies power to the load by using the switch element in the charging manager;
when the charging manager is not electrically connected to the external power supply and when the voltage of the battery is less than a second threshold, the logic control circuit controls the control end of the switch element to disconnect the first end and the second end of the switch element, the logic control circuit controls the control end of the step-up circuit to connect the step-up circuit, and the battery supplies power to the load by using the step-up circuit, wherein the second threshold is less than or equal to the first threshold; and
the step-up circuit and the switch element of the charging manager are electrically connected in parallel.

### Claim 7 (depends on 6)

The terminal according to claim 6, wherein when the charging manager is electrically connected to the external power supply, the external power supply supplies power to the load by using the charging manager, the logic control circuit controls the control end of the switch element to connect the first end and the second end of the switch element, and the external power supply charges the battery by using the switch element.

### Claim 8 (depends on 6)

The terminal according to claim 6, wherein when the charging manager is electrically connected to the external power supply and the voltage of the battery is greater than a third threshold, the external power supply supplies power to the load by using the charging manager, and the logic control circuit controls the control end of the switch element to disconnect the first end and the second end of the switch element, wherein the third threshold is greater than the first threshold.

### Claim 9 (depends on 6)

The terminal according to claim 6, wherein the logic control circuit further comprises an input end, and the logic control circuit obtains the voltage of the battery by using the input end.

### Claim 10 (depends on 6)

The terminal according to claim 6, wherein the charging manager and the step-up circuit are integrated into the single circuit chip.