WO2023010462A1

WO2023010462A1 - Power source circuit and electronic device

Info

Publication number: WO2023010462A1
Application number: PCT/CN2021/111025
Authority: WO
Inventors: 雷云; 张智锋; 黄锦智; 张兵
Original assignee: 深圳市华思旭科技有限公司
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2023-02-09
Also published as: CN116420127A

Abstract

Provided in the present application are a power source circuit and an electronic device. The power source circuit comprises: a first power source input terminal, which is connected to an electrical device and is used for connecting a first power source module, such that the first power source module supplies power to the electrical device; and a second power source module, which is connected to the electrical device, and is used for storing electric energy, and when the first power source module stops supplying power, for using the stored electric energy to supply power to the electrical device, such that the electrical device can work by means of using the power supplied by the second power source module. By means of the power source circuit provided in the present application, when the first power source module stops supplying power, the second power source module can continuously supply power to the electrical device as a back-up power source, so as to ensure that the electrical device can continue to work after a power failure.

Description

Power circuits and electronic equipment

technical field

The present application relates to the field of electronic technology, in particular to a power supply circuit and electronic equipment.

Background technique

At present, electronic devices with controllers as the core are more and more widely used. Some electronic devices on the market use peripheral circuits to directly connect to external power sources to supply power to controllers. ) or the peripheral circuit fails, the controller will suddenly lose power, causing some important data to be lost because it is too late to store, and in severe cases, it may even cause the electronic equipment to crash and cannot be restored to use again.

Contents of the invention

The first aspect of the present application provides a power supply circuit, the power supply circuit includes a first power supply input terminal, connected to a power consumption device, and used to connect to a first power supply module, so that the first power supply module can control the power consumption by the first power supply module. power supply for equipment; and a second power module, connected to the electrical equipment, for storing electrical energy, and using the stored electrical energy to supply power to the electrical equipment when the first power supply module stops supplying power, so as to The electric device can use the power supplied by the second power supply module to work.

The second aspect of the present application provides an electronic device, the electronic device includes an electric device and the power supply circuit described in the first aspect above, wherein the electric device is respectively connected to the first power input terminal of the power supply circuit Connect to the second power module.

The power supply circuit provided by this application is used to supply power to electrical equipment, and the power supply circuit is provided with a second power supply module. When the first power supply module supplies power normally, the first power supply module supplies power to the electrical equipment through the power supply circuit, and when the first power supply module stops supplying power, the second power supply module acts as a backup power supply The electric device can be continuously powered for a period of time, so as to ensure that the electric device can continue to work.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some implementations of the present application. Those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of functional modules of a power supply circuit provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of functional modules of another power supply circuit provided by an embodiment of the present application.

FIG. 3 is a schematic diagram of a circuit structure of a power supply circuit provided by an embodiment of the present application.

Fig. 4 is a schematic diagram of functional modules of an electronic device provided by an embodiment of the present application.

Description of main component symbols

Power Circuit 100

The first power input terminal 10

The first power module 200

The first isolation module 41

Second isolation module 42

The third isolation module 43

Second power module 20

Voltage regulator module 30

Voltage divider module 50

Clamp Module 60

Voltage divider output terminal 501

Controller 300

Control Chip U2

Resistor R1, R2

The first unidirectional conduction element D1

The second unidirectional conduction element D3

The third unidirectional conduction element D4

Clamping Diodes D21, D22

Capacitor CE1, C1, C2, C3, C4

Ground point GND

Regulator U1

Electronic equipment 600

The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Wherein, the accompanying drawings are used for illustrative purposes only, represent only schematic diagrams, and should not be construed as limitations on the present application.

Unless defined otherwise, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the present application is only for the purpose of describing specific implementations, and is not intended to limit the present application. In the following description, the use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating the description of the present application and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

It should be noted that the "connection" in the embodiment of the present application includes the form of physical line connection and/or wireless connection between components to realize the transmission of electric energy. In addition, the "connection" may also include direct connection or indirect connection.

Please refer to FIG. 1 , the embodiment of the present application provides a power supply circuit 100 for supplying power to electrical equipment. The power circuit 100 includes a first power input terminal 10 and a second power module 20 .

The first power input terminal 10 is connected to the electrical equipment (the controller 300 is taken as an example in FIG. 1 ), and the first power input terminal 10 is used to connect to the first power module 200 to realize the first power supply The module 200 supplies power to the electrical device.

The second power supply module 20 is connected to the electric device, and the second power supply module 20 is used to store electric energy, and when the first power supply module 200 stops supplying power, use the stored electric energy to The electric device is powered, so that the electric device can work with the power supplied by the second power supply module 20 .

The power supply circuit 100 provided in this application is used to supply power to the controller 300 , and the power supply circuit is provided with a second power supply module 20 . When the first power supply module 200 supplies power normally, the first power supply module 200 supplies power to the controller 300 through the power supply circuit 100, and when the first power supply module 200 stops supplying power, the second power supply As a backup power supply, the module 20 can continuously supply power to the electrical equipment for a period of time, so as to ensure that the electrical equipment can continue to work.

Exemplarily, the embodiment of the present application can be applied to a starting power supply or a battery clip, and the battery clamp is a connector for connecting the starting power supply and a car battery. The first power supply module 200 may include a cell assembly for starting a power supply, and the electrical device may include a functional module in a starting power supply or a battery clip, such as a controller, an alarm module, a load connection state detection module, a current detection module, a voltage detection module, etc. module or temperature detection module, etc. When the battery cell that starts the power supply stops outputting power supply, the second power supply module 20 can continue to supply power to the functional modules, so that the functional modules can continue to work.

In one embodiment, the electrical device includes the controller 300, and the controller 300 can use the power supply of the second power module 20 to perform an emergency storage function when the first power module 200 stops supplying power. , the emergency storage function includes storing preset type data.

Exemplarily, the first power supply module 200 may include, but not limited to, an external power supply, such as a charging adapter and a storage battery.

Exemplarily, taking the controller in the starting power supply or the battery clip as an example, the starting power supply or the controller 300 in the battery clip can be used to control the starting power supply to charge the load device (such as a car battery). The first power supply module 200 may include a battery assembly for starting a power supply, and the battery assembly may supply power to load equipment, and may also be connected to the controller 300 through a voltage stabilizing module 30 to realize power supply for the controller 300 for starting a power supply.

Exemplarily, the preset type data includes important data preset according to requirements. For example, when the controller 300 is applied to a starting power supply product, the preset type data may include starting power supply power data, battery At least one of component voltage data, external load voltage data, temperature data, and ignition times data; when the controller 300 is applied to a shared power bank, the preset type data may include power bank ID number data, charging At least one of charging time data and remaining power data of the treasure.

In this way, when the first power supply module 200 supplies power normally, the first power supply module 200 supplies power to the controller 300 through the power supply circuit 100, and when the first power supply module 200 stops supplying power (for example, voltage loss or power supply), the second power supply module 20 can continue to supply power to the controller 300 for a period of time as a backup power supply, so as to ensure that the controller 300 can perform the emergency storage function in time, so as to avoid loss of important data and avoid The controller and other electronic components are damaged due to sudden power failure.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of functional modules of another power supply circuit provided by an embodiment of the present application.

In this embodiment, the power supply circuit 100 further includes a first isolation module 41, and the first power input terminal 10 is connected to the electric equipment through the first isolation module 41 (the controller 300 is taken as an example in FIG. 2 ), the first isolation module 41 is used to realize the one-way conduction of the first power supply module 200 to the electric device.

In this embodiment, the power supply circuit 100 further includes a second isolation module 42, the second isolation module 42 is connected between the first power input terminal 10 and the second power supply module 20, and the second isolation module 42 is The second isolation module 42 is used to implement unidirectional conduction between the first power module 200 and the second power module 20 . In this way, it is possible to prevent the second power module 20 from sending power back to the first power module 200 .

In this embodiment, the power supply circuit 100 further includes a third isolation module 43, the second power supply module 20 is connected to the electrical equipment through the third isolation module 43, and the third isolation module 43 is used for The one-way conduction of the second power supply module 20 to the electrical equipment is realized.

In this embodiment, when the electric device includes the controller 300, the first power input terminal 10 is also used to provide the electric signal for the electric device, so that the electric device can determine The power supply status of the first power module 200 . The electrical device is configured to determine that the first power module 200 stops supplying power in response to the electrical signal provided by the first power input terminal 10 not satisfying a preset electrical signal condition, and executes an emergency storage function. Wherein, the preset electrical signal condition is that the voltage value of the electrical signal provided by the first power input terminal 10 is greater than a preset voltage threshold, and the preset voltage threshold can be preset according to requirements, for example, set to 0V.

In this embodiment, the power supply circuit 100 further includes a voltage stabilizing module 30 , and both the first power input terminal 10 and the second power supply module 20 are connected to the electrical equipment through the voltage stabilizing module 30 . The voltage stabilizing module 30 is used to convert the voltage provided by the first power input terminal 10 and/or the second power supply module 20, and output a stable voltage VCC to the electric device, for example, the The stable voltage VCC is a DC voltage of 5V.

In this embodiment, the power supply circuit 100 further includes a voltage divider module 50 connected to the first power input terminal 10, and the voltage divider module 50 is used to carry out the input voltage of the first power supply input terminal 10 Partial pressure. The voltage dividing module 50 is used to divide the input voltage of the first power supply input terminal 10 and provide a divided voltage signal to charge the second power supply module 20 . Specifically, the first power supply input terminal 10 is connected to the second power supply module 20 through the voltage divider module 50 and the second isolation module 42, and the second isolation module 42 is used to implement the first power supply The module 200 conducts unidirectionally to the second power module 20 , thereby preventing the second power module 20 from sending power back to the first power module 200 .

Further, the voltage dividing module 50 is also used for providing the voltage dividing signal to the electric device, so that the electric device can determine the power supply condition of the first power module 200 according to the voltage dividing signal. The electric device is configured to determine that the first power module 200 stops supplying power in response to the voltage value of the divided voltage signal being less than or equal to a preset voltage threshold. Specifically, the voltage division module 50 includes a voltage division output terminal 501, the electrical equipment is connected to the voltage division output terminal 501, and the electrical equipment is used to obtain the voltage division signal of the voltage division output terminal 501, And in response to the voltage value of the divided voltage signal being less than or equal to the preset voltage threshold, it is determined that the first power module 200 stops supplying power. Wherein, the preset voltage threshold can be preset according to requirements, for example, set to 0V.

The circuit structures and working principles of the above-mentioned modules 10-50 will be described in detail below in conjunction with FIG. 3 .

In this embodiment, the first power supply module 200 includes an external battery BAT, a rectifier, etc., which are not limited here, as long as a suitable power supply can be input to the first power input terminal 10 .

In this embodiment, the voltage divider module 50 further includes a resistor R1 and a resistor R2, the first end of the resistor R1 is connected to the first power input terminal 10, and the second end of the resistor R1 is connected to the voltage divider output terminal 501 , the first end of the resistor R2 is connected to the voltage divider output end 501, and the second end of the resistor R2 is connected to the ground point GND. The resistance values of the resistors R1 and R2 can be selected according to requirements, and the calculation formula of the voltage V501 of the voltage divider output terminal 501 is:

V ₅₀₁ =V _BAT ×R ₂ /(R ₁ +R ₂ ), wherein, R ₁ and R ₂ are the resistance values of resistor R1 and resistor R2 respectively, and V _BAT is the voltage VBAT of the first power input terminal 10 Voltage value.

Wherein, the voltage division output terminal 501 also sends a voltage division signal BAT_SCAN to the electrical equipment, and the electrical equipment is used to respond to the signal value of the voltage division signal BAT_SCAN being less than or equal to the preset voltage threshold, When it is determined that the first power supply module 200 stops supplying power and the electric device includes the controller 300 , the controller 300 may execute an emergency storage function in response to the first power supply module 200 stopping supplying power.

In this embodiment, the first isolation module 41 includes a first unidirectional conduction element D1, the second isolation module 42 includes a second unidirectional conduction element D3, and the third isolation module 43 includes a third unidirectional conduction element D3. pass element D4. Exemplarily, the unidirectional conduction element adopts a diode. Exemplarily, the anode of the first unidirectional conduction element D1 is connected to the first power input terminal 10, the cathode of the first unidirectional conduction element D1 serves as the output terminal of the isolation module 40, and the first The cathode of the unidirectional conduction element D1 is connected to the input terminal VIN of the voltage stabilizing module 30 , and the first power supply input terminal 10 provides the input voltage VBAT to the voltage stabilizing module 30 through the first unidirectional conduction element D1 .

The anode of the second unidirectional conduction element D3 is connected to the voltage divider output terminal 501, the cathode of the second unidirectional conduction element D3 is connected to the second power module 20, and the first power input terminal 10 passes through the The second unidirectional conduction element D3 provides charging power to the second power module 20 , wherein the charging voltage received by the second power module 20 is the voltage V501 output from the voltage dividing output terminal 501 . It should be noted that, when the first power supply module 200 supplies power normally, since the charging voltage V501 received by the second power supply module 20 is lower than the voltage VBAT of the first power input terminal 10, therefore, the The second power module 20 cannot discharge the voltage stabilizing module 30 at the same time during the process of charging and storing energy. In this way, it can be ensured that when the first power module 200 supplies power normally, the second power module 20 It can stay in a fully charged state after being fully charged.

The anode of the third unidirectional conduction element D4 is connected to the second power module 20, the cathode of the third unidirectional conduction element D4 is connected to the input terminal VIN of the voltage stabilizing module 30, and the second power module 20 The input voltage is provided to the voltage stabilizing module 30 through the third unidirectional conduction element D4. Apparently, the first unidirectional conduction element D1 and the second unidirectional conduction element D3 are also used to prevent the second power supply module 20 from sending power back to the first power input terminal 10 .

Exemplarily, the second power module 20 includes a capacitor component, and the capacitor component includes at least one of a tantalum capacitor and a super capacitor. The capacitor component may include one or more capacitors, and the connections among the multiple capacitors include series connection and/or parallel connection. In this embodiment, the second power module 20 includes a capacitor CE1, one end of the capacitor CE1 is connected to the anode of the third unidirectional conduction element D4, and the other end is connected to the ground point GND. Since the tantalum capacitor has the advantages of good stability, small size, and large capacitance, the capacitor CE1 includes a tantalum capacitor, and the capacitance value of the capacitor CE1 can be selected according to the application scenario of the electrical device. It can be understood that, The higher the capacitance value of the capacitor CE1 is, the longer the maximum discharge time is. Optionally, the capacitor CE1 may also be a common capacitor and/or a super capacitor. Of course, in some embodiments, the second power module 20 may also use a storage battery and/or other energy storage devices.

In this embodiment, the voltage stabilizing module 30 includes a voltage regulator U1, a capacitor C2 and a capacitor C3, the capacitor C2 is connected between the input terminal of the voltage regulator U1 and the ground point GND, the The capacitor C3 is connected between the output terminal of the voltage regulator U1 and the ground point, and both the capacitor C2 and the capacitor C3 are used for filtering. The voltage regulator U1 is used to receive the input voltage of the first power supply input terminal 10 through the first unidirectional conduction element D1, and to receive the second power supply through the third unidirectional conduction element D4 The input voltage of the module 20, and performs voltage conversion on the input voltage to output a stable voltage VCC, so as to provide a stable power supply voltage for the electrical equipment and other functional modules. Wherein, the voltage regulator U1 can be a DC-DC converter or a linear voltage regulator, such as a low dropout linear voltage regulator (low dropout regulator, LDO).

In this embodiment, the power supply circuit 100 further includes a clamp module 60 connected to the voltage division output terminal 501, and the clamp module 60 is used to limit the voltage value of the voltage division signal BAT_SCAN to protect the The electric equipment will not be damaged due to the voltage value of the divided voltage signal BAT_SCAN being too high. The clamping module 60 includes a first clamping diode D21 and a second clamping diode D22. The capacitor C4 is connected between the voltage divider output terminal 501 and the ground point GND, and the capacitor C4 is used for filtering. The anode of the first clamping diode D21 is connected to the ground point GND, and the cathode is connected to the voltage dividing output terminal 501 . The anode of the second clamping diode D22 is connected to the voltage dividing output terminal 501 , and the cathode is connected to the output terminal VOUT of the voltage stabilizing module 30 . Since the turn-on voltage drop of the first clamping diode D21 and the second clamping diode D22 is relatively small, it can be ignored. The voltage value of BAT_SCAN is clamped below the stable voltage VCC, and the first clamping diode D21 can clamp the voltage value of the divided voltage signal BAT_SCAN above 0V.

Please refer to FIG. 4 , the present application also provides an electronic device 600, which includes the above-mentioned power supply circuit 100 and electrical equipment (the controller 300 is taken as an example in FIG. 3 ), wherein the controller 300 and The first power input terminal 10 of the power supply circuit 100 is connected to the second power module 20, and the controller 300 uses the The power supply of the second power supply module 20 performs an emergency storage function, and the emergency storage function includes storing preset type data. The first power supply module 200 may be a charging adapter, a storage battery, a lithium battery, etc., which can provide power for the electronic device 600 . The electronic device 600 may be an electronic device to which the controller 300 is applied, such as a power-on product, a shared power bank, and the like.

Exemplarily, the electric device may include a controller 300, and the controller 300 may adopt a programmable control device, such as a microcontroller (Microcontroller Unit, MCU), a programmable logic array (Field-Programmable Gate Array, FPGA), Or digital signal processor (Digital Signal Processor, DSP), etc. The controller 300, as the logic operation and control center of the electronic device 600, is mainly responsible for functions such as data collection and conversion, logic operation, data communication, execution drive output, and emergency storage. Exemplarily, the controller 300 includes a control chip U2, the power terminal of the control chip U2 is connected to the output terminal of the voltage stabilizing module 30, and the capacitor C1 is connected to the power terminal of the control chip U2 and the ground point GND Between, the capacitor C1 is used for filtering.

In some embodiments, the electronic device 600 further includes an energy storage device (not shown in the figure) or a battery clip (not shown in the figure), wherein the energy storage device includes a vehicle starting power supply. The controller 300 of the electronic device 600 may be used to control the electronic device 600 to charge a load device (such as a car battery). The first power supply module 200 may include the battery assembly of the electronic device 600, the battery assembly may supply power to the load device, and may also be connected to the controller 300 through the voltage stabilizing module 30 to be implemented as the controller of the electronic device 600 300 power supply.

The electronic device 600 provided by this application uses the above-mentioned power supply circuit 100, and when the first power supply module 200 stops supplying power (for example, voltage loss or power failure), the second power supply module 20 can be used as a backup power supply Continuously supply power to the controller 300 for a period of time to ensure that the controller 300 can perform the emergency storage function in time, thereby avoiding loss of important data and damage to the controller and other electronic components due to sudden power failure.

The above description is the preferred implementation mode of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the application, some improvements and modifications can also be made, and these improvements and modifications are also considered For the scope of protection of this application.

Claims

A power supply circuit, characterized in that it comprises:

The first power input terminal is connected to the electric device, and is used to connect to the first power module, so that the first power module supplies power to the electric device; and

The second power supply module is connected to the electrical equipment, and is used to store electrical energy, and when the first power supply module stops supplying power, use the stored electrical energy to supply power to the electrical equipment, so that the electrical equipment The electrical equipment can work with the power supplied by the second power supply module.
The power supply circuit according to claim 1, wherein the electric device comprises a controller, and the controller uses the power supplied by the second power supply module to execute An emergency storage function, the emergency storage function includes storing preset type data.
The power circuit according to claim 1, wherein the first power input terminal is also connected to the second power module, and the first power module is also used to charge the second power module, so that The second power supply module stores electrical energy.
The power supply circuit according to any one of claims 1 to 3, further comprising a voltage stabilizing module, the voltage stabilizing module is connected to the first power input terminal, the second power supply module and the power supply For equipment, the voltage stabilizing module is used to stabilize the voltage supplied by the first power supply module or the second power supply module to the electric device.
The power supply circuit according to any one of claims 1 to 3, characterized in that, the power supply circuit further comprises a first isolation module, and the first power input terminal is connected to the electrical equipment through the first isolation module , the first isolation module is used to implement unidirectional conduction between the first power supply module and the electric device.
The power supply circuit according to any one of claims 1 to 3, characterized in that, the power supply circuit further comprises a second isolation module, and the second isolation module is connected between the first power input terminal and the second Between the power modules, the second isolation module is used to implement unidirectional conduction between the first power module and the second power module.
The power supply circuit according to any one of claims 1 to 3, wherein the power supply circuit further comprises a third isolation module, and the second power supply module is connected to the electrical equipment through the third isolation module, The third isolation module is used to realize unidirectional conduction of the second power supply module to the electric device.
The power supply circuit according to claim 2, wherein the first power supply input terminal is also used to provide the controller with an electrical signal, so that the controller can determine the first power supply according to the electrical signal The power supply of the module;

The controller is configured to determine that the first power module stops supplying power and execute an emergency storage function in response to the electrical signal provided by the first power input terminal not meeting a preset electrical signal condition.
The power supply circuit according to claim 1, characterized in that, the power supply circuit further comprises a voltage divider module connected to the first power supply input terminal, and the voltage divider module is used for inputting the first power supply input terminal The voltage is divided, and a divided signal is provided to charge the second power module.
The power supply circuit according to claim 9, wherein the voltage division module is further used to provide the voltage division signal for the electrical equipment, so that the electrical equipment can determine the voltage division signal according to the voltage division signal. Describe the power supply situation of the first power supply module;

The electric device is configured to determine that the first power module stops supplying power in response to the voltage value of the divided voltage signal being less than or equal to a preset voltage threshold.
The power supply circuit according to claim 9 or 10, characterized in that, the power supply circuit further comprises a second isolation module, and the first power input terminal is connected to the A second power supply module, the second isolation module is used to implement unidirectional conduction between the first power supply module and the second power supply module.
The power circuit according to claim 1, wherein the second power module comprises a capacitor component.
The power supply circuit according to claim 12, wherein the capacitor component comprises at least one of a tantalum capacitor and a super capacitor.
An electronic device comprising:

electrical equipment; and

The power supply circuit according to any one of claims 1-13, wherein the power supply circuit is used to supply power to the electrical equipment;

Wherein, the electric device is respectively connected to the first power input terminal of the power circuit and the second power module.
The electronic device according to claim 14, wherein the power-consuming device comprises a controller, and the controller utilizes the The power supply of the second power supply module performs an emergency storage function, and the emergency storage function includes storing preset type data.
The electronic device according to claim 14, wherein the electronic device includes an energy storage device or a battery clip, and the energy storage device includes a vehicle starting power supply.