CN219739991U - Power supply circuit and power supply device - Google Patents

Abstract

The utility model provides a power supply circuit and a power supply device, and relates to the technical field of charging. This power supply circuit is applied to the base that charges, and the base that charges is connected with portable power source, and this power supply circuit includes: a first power supply circuit and a control circuit; wherein, control circuit is used for: switching on the mobile power supply in an overdischarge state to supply power to the mobile power supply through the first power supply circuit; and disconnecting the mobile power supply under the condition that the mobile power supply is in communication connection with the charging base so as to stop supplying power to the mobile power supply through the first power supply circuit. The power supply circuit provided by the utility model can avoid the situation that the charging base cannot charge the mobile power supply when the mobile power supply is excessively discharged.

Description

Power supply circuit and power supply device

Technical Field

The present utility model relates to the field of charging technologies, and in particular, to a power supply circuit and a power supply device.

Background

The components that charge the mobile Power supply typically include a charging base and a Power Adapter (Power Adapter). The power adapter provides power input for the charging base, and the charging base charges the mobile power supply through a spring Pin (Pogo Pin).

However, the mobile power supply is in an overdischarge state under the conditions that the mobile power supply is completely discharged and is not charged in time, so that a main control chip in the mobile power supply loses working capacity, and the charging base cannot charge the main control chip.

Disclosure of Invention

The utility model provides a power supply circuit and a power supply device, which can avoid the situation that a charging base cannot charge a mobile power supply when the mobile power supply is in an overdischarge state.

Other features and advantages of the utility model will be apparent from the following detailed description, or may be learned by the practice of the utility model.

In a first aspect, a power supply circuit is provided, and the power supply circuit is applied to a charging base, the charging base is connected with a mobile power supply, and the power supply circuit includes: a first power supply circuit and a control circuit; the control circuit is used for: when the charging base is electrified, the charging base is connected to supply power to the mobile power supply through the first power supply circuit, wherein the mobile power supply is in an overdischarge state; and disconnecting the mobile power supply from the charging base under the condition that the mobile power supply is in communication connection with the charging base, so as to stop power supply to the mobile power supply through the first power supply circuit.

In one embodiment of the present utility model, the power supply circuit further includes: the second power supply circuit and the main control chip; the first end of the first power supply circuit is connected with the power input end in the charging base; the second end of the first power supply circuit is connected with the first end of the control circuit; the first end of the second power supply circuit is connected with the power input end; the second end of the second power supply circuit is connected with a spring pin in the charging base.

In one embodiment of the present utility model, the power supply circuit further includes: a main control chip; the first end of the main control chip is connected with the third end of the second power supply circuit and the second end of the control circuit; the second end of the main control chip is connected with the second end of the first power supply circuit; the third end of the main control chip is connected with the spring needle; and a third end of the control circuit is connected with the spring needle.

In one embodiment of the present utility model, the power supply circuit further includes: a second power supply circuit; wherein, the second power supply circuit is used for: disconnecting the charging base when the charging base is electrified, wherein the mobile power supply is in an overdischarge state; and switching on the mobile power supply under the condition that the mobile power supply and the charging base are in communication connection so as to supply power for the mobile power supply.

In one embodiment of the present utility model, the power supply circuit further includes: a main control chip; the main control chip is used for: generating a first control signal when the charging base is electrified; wherein, the first control signal is used for: controlling the control circuit to be switched on and controlling the second power supply circuit to be switched off; the first control signal is a low level signal, and the mobile power supply is in an overdischarge state.

In one embodiment of the present utility model, the power supply circuit further includes: a main control chip; the main control chip is used for: generating a second control signal under the condition that the mobile power supply and the charging base are in communication connection; wherein the second control signal is used for: controlling the control circuit to be disconnected and controlling the second power supply circuit to be connected; wherein the second control signal is a high level signal.

In one embodiment of the present utility model, the control circuit includes: a triode and a body diode; the control circuit is specifically used for: when the charging base is electrified, the triode and the body diode are conducted so as to supply power to the mobile power supply through the first power supply circuit, wherein the mobile power supply is in an overdischarge state; and under the condition that the mobile power supply and the charging base are in communication connection, the triode and the body diode are closed so as to stop supplying power to the mobile power supply through the first power supply circuit.

In one embodiment of the present utility model, the power supply circuit further includes: a main control chip; the first power supply circuit is specifically configured to: when the control circuit is in a connection state, the spring needle in the charging base supplies power to the mobile power supply so as to establish communication connection between the mobile power supply and the main control chip; the first power supply circuit is further configured to: and supplying power to the main control chip.

In an embodiment of the present utility model, the second power supply circuit further includes: a capacitor; wherein, above-mentioned electric capacity is used for: and under the condition that the mobile power supply and the charging base are in communication connection, the connection of the second power supply circuit is delayed.

In a second aspect, there is provided a power supply device comprising the power supply circuit of the first aspect.

The embodiment of the utility model provides a power supply circuit and a power supply device, which have the following technical effects:

in general, the mobile power supply is in an overdischarge state under the conditions that the mobile power supply is completely discharged and is not charged in time, so that a main control chip in the mobile power supply loses working capacity, and the charging base cannot charge the main control chip. The power supply circuit provided by the utility model is applied to a charging base, and comprises a first power supply circuit and a control circuit. The control circuit is switched on when the mobile power supply is in an overdischarge state so as to supply power to the mobile power supply through the first power supply circuit, and is switched off when the mobile power supply is in communication connection with the charging base so as to stop supplying power to the mobile power supply through the first power supply circuit; the first power supply circuit is used for supplying power to the mobile power supply in a state that the control circuit is on, so that the mobile power supply and the charging base are in communication connection, and the situation that the mobile power supply cannot work due to overdischarge is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a block diagram of an exemplary power supply circuit according to an embodiment of the present utility model;

fig. 2 is a connection structure diagram of an example of a charging base according to an embodiment of the present utility model;

FIG. 3 is a block diagram of an example control circuit provided in an embodiment of the present utility model;

FIG. 4 is a schematic diagram illustrating an example of a power adapter and a charging base in communication connection according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of an example of a charging base for supplying power to a mobile power supply through a first power supply circuit according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of an example of a charging base for supplying power to a mobile power supply through a second power supply circuit according to an embodiment of the present utility model;

FIG. 7 is a flowchart of an example of the power circuit operation logic provided in an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of an example of a power supply device according to an embodiment of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the utility model as detailed in the accompanying claims.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

In the related art, a solution is provided for the problem that a main control chip inside a mobile power supply loses working capacity because the mobile power supply is in an overdischarge state under the conditions of discharging and not timely charging: the spring needle of the charging base is always in a charged state. However, this solution has drawbacks: when the spring needle is always in a charged state, external metal foreign matters can cause the spring needle to be short-circuited, so that the power adapter connected with the charging base is further caused to enter a protection state due to overcurrent, and some power adapters cannot automatically recover after entering the protection state, and user experience is affected.

The utility model provides a power supply circuit and a power supply device, which can solve the problem that a main control chip in a mobile power supply loses working capacity due to overdischarge, and the problem that a spring needle loses working capacity due to external metal foreign matters in the prior art.

Fig. 1 is a block diagram of an example power supply circuit provided by the present utility model, and fig. 2 is a connection block diagram of an example charging base provided by the present utility model.

In an exemplary embodiment, as shown in fig. 1, the power supply circuit 100 includes a first power supply circuit 10, a control circuit 11, a second power supply circuit 12, and a main control chip 13.

In an exemplary embodiment, as shown in fig. 2, the power supply circuit 100 is applied in a charging base 110. The charging base 110 includes a power input 111 and pogo pins (e.g., pogo pin 1, pogo pin 2, pogo pin 3, pogo pin 4).

The power input end 111 is a power supply port of the charging base 110, and the power supply port is connected with the power adapter, that is, the power adapter supplies power to the charging base 110 through the power input end 111.

Wherein a first terminal of the power supply circuit 100 is connected to the power input terminal 111. A second end of the power supply circuit 100 is connected to a pogo pin. The mobile power supply 112 is connected with the charging base 110 through a spring pin, that is, the charging base 110 supplies power to the mobile power supply 112 through the spring pin.

Note that, the number of pogo pins and the connection between each pogo pin and the power supply circuit shown in fig. 2 are only examples, and the present embodiment is not limited thereto.

For example, for the chip U1 in the main control chip 13, a micro control unit (Microcontroller Unit, MCU) or other kinds of chips may be used. The type and model of the chip U1 are not limited in this embodiment.

In the main control chip 13, pins SDA1 and SCL1 (denoted as the third terminal of the main control chip 13) for communication connection, an enable terminal SC87234_en (denoted as the first terminal of the main control chip 13), and a 5V input port with resistors R100 and R101 (denoted as the second terminal of the main control chip 13) are configured.

The enable terminal SC87234_en is used for outputting a control signal.

Illustratively, the first power supply circuit 10 includes therein a chip U2, a VBUS port (denoted as a first end of the first power supply circuit), and a 5V output port (denoted as a second end of the first power supply circuit).

The chip U2 is usually a direct current-direct current converter (DC-to-DC converter). After the charging base 110 is powered on, the first power supply circuit 10 can supply power to the main control chip 13 through the 5V output port.

In addition, the first power supply circuit 10 can also play a role in current limiting, so that the power supply circuit 100 and the charging base 10 can be prevented from stopping working due to the short circuit of the exposed spring needle, that is, after the first power supply circuit 10 is connected, even if the spring needle is short-circuited, the power supply circuit 100 and the charging base 10 can work normally.

In addition, after the first power supply circuit 10 is connected, an MCU chip for detecting the spring needle current is not required to be configured, so that the circuit structure is simplified.

Illustratively, in the second power supply circuit 12, a control signal input section, a power supply input section, a control chip section, an output voltage feedback section, and a portable power supply interface section are generally included.

Wherein the power input section comprises a VBUS port (denoted as first end of the second supply circuit 12).

The control signal input portion mainly includes an enable terminal SC87234_en (denoted as a third terminal of the second power supply circuit 12), a capacitor C111, and a resistor R93. The enabling end SC87234_en is used for receiving a control signal sent by the main control chip 13. The capacitor C111 is used for delaying the opening of the chip U3, so as to realize the slow start of the second power supply circuit 12 after the control circuit 11 is disconnected. The resistor R93 is used for ensuring that the enable terminal SC87234_en is in a low level state after the charging base 110 is powered on, so as to prevent the chip U3 from being turned on by mistake due to the floating voltage.

The chip U3 of the control chip part is usually a dc-dc converter, and can play a role of reducing voltage in the power supply circuit 100.

The output voltage feedback section may include resistors R87 and R89, and a capacitor C101, among others.

Wherein the portable power source interface part is connected to the pogo pins through pins SDA1 and SCL1 (denoted as second end of the second power supply circuit 12) to supply power to the portable power source.

Fig. 3 is a block diagram of an example control circuit provided by the present utility model.

Illustratively, as shown in fig. 3, the control circuit 11 mainly includes a control driving portion, a first power supply circuit control portion, current limiting resistors R94 and R95, a 5V port, and a POGO5V port (referred to as a first end of the control circuit 11).

The control driving part mainly includes a transistor Q8 and an enable terminal SC87234_en (denoted as a second terminal of the control circuit 11). The enabling end SC87234_en is used for receiving a control signal sent by the main control chip 13.

The first power supply circuit control section mainly includes a body diode Q7, and is connected to a 5V port (referred to as a first end of the control circuit 11), which is connected to the first power supply circuit 10.

In addition, the control circuit 11 may be provided with a diode D11 as shown in fig. 3. The diode D11 can prevent the current from flowing backward through the body diode Q7 when the second power supply circuit 12 is turned on.

Wherein the POGO5V port (denoted as third terminal of the control circuit 11) is connected to the POGO pin to supply power to the POGO pin.

Fig. 4 is a schematic diagram illustrating an example of a communication connection between a power adapter and a charging base according to the present utility model.

In the exemplary embodiment, the power adapter is first connected to the charging base 110 via the power input 111. After the connection, the main control chip 13 can establish communication connection with the power adapter through the pins SDA1 and SCL 1. Thus, the power adapter obtains the power gear required by the charging base 110 and supplies power to the charging base 110 according to the power gear.

When the charging base 110 is powered on, the main control chip 13 generates a first control signal, and sends the first control signal through the enabling terminal SC87234 _en. Wherein the first control signal is used for controlling the second power supply circuit 12 to be in an off state and controlling the control circuit 11 to be in an on state. Thus, a path is formed between the first power supply circuit 10, the control circuit 11 and the pogo pin to supply power to the pogo pin through the first power supply circuit 10.

Specifically, the first control signal is a low level signal. After the enabling end SC87234_en of the second power supply circuit 12 receives the first control signal, the control chip thereof is turned off, so that the second power supply circuit 12 is turned off. After the enabling terminal SC87234_en of the control circuit 11 receives the first control signal, the triode Q8 is turned on and drives the body diode Q7 to be turned on, so that the control circuit 11 is turned on.

Fig. 5 is a schematic diagram of an example of a charging base provided by the utility model for supplying power to a mobile power supply through a first power supply circuit.

In the exemplary embodiment, it is assumed that the mobile power supply 112 is not charged after a long-time standing, and is in an overdischarged state. After the power adapter and the charging base are connected in communication, the mobile power supply 112 is inserted into the charging base 110 (the power adapter and the charging base are still connected).

As shown in fig. 5, when the mobile power supply 112 in the over-discharge state is connected to the charging base 110 through a pogo pin, the off/on states of the first power supply circuit 10, the control circuit 11, and the second power supply circuit 12 are unchanged, and the main control chip 13 is in communication with the mobile power supply 112.

Specifically, the mobile power supply 112 only has the main control chip therein operating in an overdischarged state. The mobile power supply 112 is connected with the charging base 110 through spring pins (such as spring pin 1 and spring pin 2), and a main control chip of the mobile power supply 112 communicates with the main control chip 13 through a communication protocol of software. The communication manner may include serial ports or integrated circuit buses (Inter-Integrated Circuit, IIC), and the like, which are not limited in this embodiment.

For example, after the main control chip of the mobile power supply 112 obtains the power information that can be provided by the charging base 110, the main control chip 13 sends information that the communication connection is established successfully, so as to complete the establishment of the communication connection.

Fig. 6 is a schematic diagram of an example of a charging base provided by the utility model for supplying power to a mobile power supply through a second power supply circuit.

In an exemplary embodiment, as shown in fig. 6, in a case where the mobile power supply 112 establishes a communication connection with the charging base 110 (i.e., after the main control chip 13 receives the information that the communication connection is established successfully), the main control chip 13 generates a second control signal, and sends the second control signal through the enabling terminal SC87234 _en.

The second control signal is used for controlling the second power supply circuit 12 to be in an on state and controlling the control circuit 11 to be in an off state, so that power supply to the pogo pins through the first power supply circuit 10 is stopped, and power supply to the pogo pins through the second power supply circuit 10 is stopped.

Specifically, the second control signal is a high level signal. After the enabling end SC87234_en of the second power supply circuit 12 receives the second control signal, the control chip thereof is turned on, so that the second power supply circuit 12 is turned on. After the enabling terminal SC87234_en of the control circuit 11 receives the second control signal, the triode Q8 and the body diode Q7 thereof are turned off, so that the control circuit 11 is turned off.

For example, after the control circuit 11 is turned off, the capacitor C111 may delay the opening of the chip U3, thereby realizing a slow start of the second power supply circuit 12.

In an exemplary embodiment, the specific connection relationship between the circuits in the power supply circuit 100 is as follows:

a first terminal of the first power supply circuit 10 is connected to the power input terminal 111.

A second terminal of the first power supply circuit 10 is connected to a first terminal of the control circuit 11.

The first terminal of the second power supply circuit 12 is connected to the power input terminal 111.

The second end of the second power supply circuit 12 is connected to a pogo pin, for example, pogo pin 4.

The first end of the main control chip 13 is connected with the third end of the second power supply circuit 12 and with the second end of the control circuit 11.

A second end of the main control chip 13 is connected with a second end of the first power supply circuit 10.

The third end of the main control chip 13 is connected with spring pins (for example, spring pins 1 and spring pins 2).

A third terminal of the control circuit 11 is connected to a pogo pin, for example, pogo pin 4.

FIG. 7 is a flow chart of an example of the power circuit operation logic provided by the present utility model.

In an exemplary embodiment, as shown in fig. 7, in general, the operating logic of the power supply circuit 100 is as follows:

after the charging base is connected with the power adapter and is electrified (i.e. S701: the charging base is electrified), the main control chip executes S702: the control circuit is turned on and controls the second power supply circuit to be turned off. Therefore, the charging base supplies power to the mobile power supply through the first power supply circuit, and the mobile power supply and the charging base are in communication connection (namely S703: the mobile power supply and the charging base are in communication connection).

After the communication connection is established, the mobile power supply resumes normal operation, and the main control chip executes S704: the second power supply circuit is controlled to be on, and the control circuit is controlled to be off, so that the charging base supplies power for the mobile power supply through the second power supply circuit.

In the power supply circuit provided by the utility model, the on/off of the control circuit and the second power supply circuit can be controlled through one input/output interface (namely the enabling end SC87234 _EN) of the main control chip. After the charging base is electrified, the main control chip controls the control circuit to be connected (the second power supply circuit is disconnected), so that after the mobile power supply in an overdischarge state is connected with the charging base, the mobile power supply can be powered through the first power supply circuit, and the mobile power supply and the charging base can be successfully connected in a communication mode.

After the mobile power supply is in communication connection with the charging base, the main control chip controls the second power supply circuit to be connected (the first power supply circuit is disconnected), so that the mobile power supply is powered through the second power supply circuit.

Therefore, the power supply circuit provided by the utility model can avoid the problem that the mobile power supply is in an overdischarge state due to long-term placement and cannot communicate with the charging base. In addition, the power supply circuit provided by the utility model adopts elements such as a capacitor, a triode and a body diode, and the circuit structure is simple and reliable. In addition, compared with the circuit scheme in the related art, the power supply circuit provided by the utility model can greatly save cost.

Fig. 8 is a schematic structural diagram of an exemplary power supply device according to the present utility model. Referring to fig. 8, the power supply device 800 includes: the power supply circuit 100, the processor 801, and the memory 802 described in the above embodiments.

In the embodiment of the present utility model, the processor 801 is a control center of a computer system, and may be a processor of a physical machine or a processor of a virtual machine. Processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 801 may be implemented in hardware in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 801 may also include a main processor, which is a processor for processing data in an awake state, also referred to as a central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state.

In the embodiment of the present utility model, the power supply circuit 100 includes a first power supply circuit, a control circuit, a second power supply circuit, and a main control chip, and the processor 801 may implement by controlling the power supply circuit 100:

the control circuit is connected when the charging base is electrified so as to supply power to the mobile power supply through the first power supply circuit, wherein the mobile power supply is in an overdischarge state; and disconnecting the mobile power supply from the charging base when the mobile power supply is in communication connection with the charging base, so as to stop power supply to the mobile power supply through the first power supply circuit; the first power supply circuit supplies power to the mobile power supply when the control circuit is in a connection state, so that the mobile power supply and the charging base are in communication connection.

Further, the processor 801 may control the power supply circuit 100 to realize: the second power supply circuit is disconnected when the charging base is electrified, wherein the mobile power supply is in an overdischarge state; and switching on the mobile power supply under the condition that the mobile power supply and the charging base are in communication connection so as to supply power for the mobile power supply.

Alternatively, the processor 801 may control the power supply circuit 100 to perform: the main control chip generates a first control signal when the charging base is electrified; wherein, the first control signal is used for: controlling the control circuit to be switched on and controlling the second power supply circuit to be switched off; the first control signal is a low level signal, and the mobile power supply is in an overdischarge state.

Optionally, the processor 801 may further implement by controlling the power supply circuit 100: the main control chip generates a second control signal under the condition that the mobile power supply and the charging base are in communication connection; wherein the second control signal is used for: controlling the control circuit to be disconnected and controlling the second power supply circuit to be connected; wherein the second control signal is a high level signal.

In an exemplary embodiment, based on the foregoing, the first end of the first power supply circuit is connected to a power input end in the charging base; the second end of the first power supply circuit is connected with the first end of the control circuit; the first end of the second power supply circuit is connected with the power input end; the second end of the second power supply circuit is connected with a spring needle in the charging base; the first end of the main control chip is connected with the third end of the second power supply circuit and the second end of the control circuit; the second end of the main control chip is connected with the second end of the first power supply circuit; the third end of the main control chip is connected with the spring needle; and a third end of the control circuit is connected with the spring needle.

Optionally, the processor 801 may further implement by controlling the power supply circuit 100: when the charging base is electrified, the control circuit conducts the triode and the body diode in the control circuit 100 to supply power to the mobile power supply through the first power supply circuit, wherein the mobile power supply is in an overdischarge state; and under the condition that the mobile power supply and the charging base are in communication connection, the triode and the body diode are closed so as to stop supplying power to the mobile power supply through the first power supply circuit.

Optionally, the processor 801 may further implement by controlling the power supply circuit 100: the first power supply circuit supplies power to the mobile power supply through a spring needle in the charging base when the control circuit is in a connection state, so that the mobile power supply and the main control chip are in communication connection; the method for establishing communication connection between the mobile power supply and the main control chip comprises the following steps: communication connection is established through a serial port or through an integrated circuit bus.

Optionally, the processor 801 may further implement by controlling the power supply circuit 100: the first power supply circuit supplies power to the main control chip.

Optionally, the processor 801 may further implement by controlling the power supply circuit 100: and under the condition that the mobile power supply and the charging base are in communication connection, the capacitor in the second power supply circuit delays the connection of the second power supply circuit.

Memory 802 may include one or more computer-readable storage media, which may be non-transitory. Memory 802 may also include high-speed random access memory, as well as non-volatile memory, such as one or more disk storage terminals, flash storage terminals. In some embodiments of the utility model, a non-transitory computer readable storage medium in memory 802 is used to store at least one instruction for execution by processor 801 to implement the methods of embodiments of the utility model.

In some embodiments, the power supply device 800 further includes: a peripheral interface 803, and at least one peripheral. The processor 801, the memory 802, and the peripheral interface 803 may be connected by a bus or signal line. Individual peripheral devices may be connected to the peripheral device interface 803 by buses, signal lines, or a circuit board. Specifically, the peripheral device includes at least: a power adapter 804.

Peripheral interface 803 may be used to connect at least one Input/Output (I/O) related peripheral device to processor 801 and memory 802. In some embodiments of the utility model, processor 801, memory 802, and peripheral interface 803 are integrated on the same chip or circuit board; in some other embodiments of the utility model, either or both of the processor 801, memory 802, and peripheral interface 803 may be implemented on separate chips or circuit boards. The embodiment of the present utility model is not particularly limited thereto.

The power adapter 804 is used to power the various components in the power supply 800.

The power supply device structural block diagram shown in the embodiment of the present utility model does not constitute a limitation of the power supply device 800, and the power supply device 800 may include more or less components than those shown, or may combine some components, or may employ a different arrangement of components.

In the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or order; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or unit referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present utility model.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Accordingly, equivalent variations from the claims of the present utility model are intended to be covered by the present utility model.

Claims (10)

1. A power supply circuit, characterized in that, power supply circuit is applied to the base that charges, the base that charges is connected with portable power source, power supply circuit includes: a first power supply circuit and a control circuit; wherein,,

the control circuit is used for: when the charging base is electrified, the charging base is connected to supply power to the mobile power supply through the first power supply circuit, wherein the mobile power supply is in an overdischarge state;

and disconnecting the mobile power supply under the condition that the mobile power supply and the charging base are in communication connection so as to stop supplying power to the mobile power supply through the first power supply circuit.

2. The power supply circuit of claim 1, wherein the power supply circuit further comprises: a second power supply circuit;

the first end of the first power supply circuit is connected with the power input end in the charging base;

the second end of the first power supply circuit is connected with the first end of the control circuit;

the first end of the second power supply circuit is connected with the power input end;

the second end of the second power supply circuit is connected with a spring needle in the charging base.

3. The power supply circuit of claim 2, wherein the power supply circuit further comprises: a main control chip;

the first end of the main control chip is connected with the third end of the second power supply circuit and the second end of the control circuit;

the second end of the main control chip is connected with the second end of the first power supply circuit;

the third end of the main control chip is connected with the spring needle;

and the third end of the control circuit is connected with the spring needle.

4. The power supply circuit of claim 1, wherein the power supply circuit further comprises: a second power supply circuit; wherein,,

the second power supply circuit is used for: disconnecting the charging base when the charging base is electrified, wherein the mobile power supply is in an overdischarge state; the method comprises the steps of,

and the mobile power supply is connected with the charging base under the condition that communication connection is established between the mobile power supply and the charging base so as to supply power for the mobile power supply.

5. The power supply circuit of claim 4, wherein the power supply circuit further comprises: a main control chip;

the main control chip is used for: generating a first control signal when the charging base is electrified; wherein the first control signal is for: controlling the control circuit to be switched on and controlling the second power supply circuit to be switched off; the first control signal is a low-level signal, and the mobile power supply is in an overdischarge state.

6. The power supply circuit of claim 4, wherein the power supply circuit further comprises: a main control chip;

the main control chip is used for: generating a second control signal under the condition that the mobile power supply and the charging base are in communication connection; wherein the second control signal is for: the control circuit is controlled to be disconnected, and the second power supply circuit is controlled to be connected; wherein the second control signal is a high level signal.

7. The power supply circuit according to any one of claims 1 to 6, characterized in that the control circuit comprises: a triode and a body diode;

the control circuit is specifically used for: when the charging base is electrified, the triode and the body diode are conducted so as to supply power to the mobile power supply through the first power supply circuit, wherein the mobile power supply is in an overdischarge state; the method comprises the steps of,

under the condition that the mobile power supply and the charging base are in communication connection, the triode and the body diode are closed, so that the power supply of the mobile power supply is stopped through the first power supply circuit.

8. A power supply circuit according to any one of claims 1 to 3, characterized in that the power supply circuit further comprises: a main control chip;

the first power supply circuit is specifically configured to:

when the control circuit is in a connection state, the spring needle in the charging base supplies power to the mobile power supply so as to enable the mobile power supply to be in communication connection with the main control chip;

the first power supply circuit is further configured to: and supplying power to the main control chip.

9. The power supply circuit according to any one of claims 2 to 6, characterized in that the second power supply circuit further comprises: a capacitor;

wherein the capacitance is used for: and under the condition that the mobile power supply is in communication connection with the charging base, the connection of the second power supply circuit is delayed.

10. A power supply device, characterized in that the power supply device comprises a power supply circuit as claimed in any one of claims 1 to 9.