WO2018032981A1

WO2018032981A1 - Power supply circuit of electronic apparatus, and electronic apparatus

Info

Publication number: WO2018032981A1
Application number: PCT/CN2017/095898
Authority: WO
Inventors: 肜卿; 蒋丛华; 周虎
Original assignee: 比亚迪股份有限公司
Priority date: 2016-08-17
Filing date: 2017-08-03
Publication date: 2018-02-22
Also published as: CN107769351A; CN107769351B

Abstract

A power supply circuit (100) of an electronic apparatus, and an electronic apparatus. The power supply circuit comprises: a movement energy storage module (110) used to convert dynamic energy generated by a movement of the electronic apparatus into electric energy, store the electric energy, and supply power to the electronic apparatus; a backup battery module (120); and a switching circuit module (130) connected to the movement energy storage module and the backup battery module, and used to switch between the movement energy storage module and the backup battery module to supply power to the electronic apparatus. By utilizing a power supply method employing an energy collecting technique combined with backup battery power supply, the energy generated by the movement of the electronic apparatus can be converted into the electric energy, and the electric energy can be stored. The stored electric energy can be used to supply power to the electronic apparatus, resolving a problem of short battery life of an electronic apparatus, prolonging an operation duration of the electronic apparatus, and saving power.

Description

Power supply circuit and electronic device of electronic equipment

Technical field

The present invention relates to the field of circuits, and in particular to a power supply circuit and an electronic device of an electronic device.

Background technique

Traditional electronic watches use a built-in lithium-ion battery to supply power to the watch through a battery mounted inside the watch. Currently, most watches are still powered by this method. And the traditional watch has a single function and can only be used to view time.

As wearable devices become more versatile, users wearing wearable devices are increasing. For example, a smart watch can not only view the current time, but also answer or make a call through a smart watch.

However, although the existing smart watch solves the single problem of the traditional watch function, the power supply of the watch and the battery life of the watch have not been solved. For example, most of the current smart watch designs are also powered by a lithium ion battery, which is generally used under normal use. An electric energy supplement is needed in one day, which adds a lot of unnecessary trouble to the user.

Summary of the invention

It is an object of the present invention to provide a power supply circuit and an electronic device for an electronic device to solve the problem of short-lived electronic devices in the prior art.

In order to achieve the above object, according to a first aspect of the present invention, a power supply circuit for an electronic device is provided, including:

a motion energy storage module, configured to convert kinetic energy generated by the electronic device by motion into electrical energy, and store the electrical energy to supply power to the electronic device;

Backup battery module;

And a switching circuit module connected to the motion energy storage module and the backup battery module for switching to power the electronic device by the motion energy storage module or the backup battery module.

Optionally, when the power stored by the motion energy storage module is less than a first preset value, the switching circuit module is configured to switch to powering the electronic device by the backup battery module;

The switching circuit module is configured to switch to powering the electronic device by the motion energy storage module when the power stored by the motion energy storage module is greater than or equal to the first preset value.

Optionally, the motion energy storage module includes:

a motion power generation module, configured to convert kinetic energy generated by the electronic device by motion into an alternating current output;

a rectifying and filtering circuit, configured to convert the alternating current output by the motion generating module into a direct current output;

a primary charging switch module connected to the rectifying and filtering circuit;

The first-level capacitor storage circuit is connected to the rectifying and filtering circuit through the first-stage charging switch module, and is configured to store the direct current outputted by the rectifying and filtering circuit when the first-stage charging switch module is in an on state.

Optionally, the motion energy storage module further includes:

a secondary charging switch module, configured to switch to an on state when the primary capacitor storage circuit is fully charged;

a secondary rechargeable battery is connected to the rectifying and filtering circuit through the secondary charging switch module, and is configured to store the direct current output by the rectifying and filtering circuit when the secondary charging switch module is in an on state

Optionally, the motion energy storage module further includes a first diode; an anode of the first diode is connected to the secondary rechargeable battery, and a cathode of the first diode is connected to the first diode Stage capacitor storage circuit;

The secondary rechargeable battery is further configured to deliver stored electrical energy to the primary capacitor storage circuit through the first diode.

Optionally, the motion energy storage module further includes:

a first voltage detecting module, configured to detect a voltage output by the primary capacitor storage circuit, and send a conduction signal to the secondary charging switch module when the detected voltage value is greater than a second preset value, to The secondary charging switch module is switched to an on state.

Optionally, the secondary charging switch module includes:

a second diode, an anode of the second diode is connected to the primary charging switch module;

a triode having a base connected to an output of the first voltage detecting module and an emitter grounded through a resistor;

a first switching transistor, a gate of the first switching transistor is connected to a collector of the triode, a source of the first switching transistor is connected to a cathode of the second diode, and the first switching transistor The drain is coupled to the secondary rechargeable battery.

Optionally, the switching circuit module includes:

a second voltage detecting module, configured to detect an actual voltage output by the motion storage module, and send a signal that enables the backup battery module to switch to a location when the detected actual voltage value is less than a target voltage value The backup battery module supplies power to the electronic device; when the detected actual voltage value is greater than or equal to the target voltage value, transmitting a signal that enables the motion energy storage module to switch to being stored by the motion The energy module supplies power to the electronic device.

Optionally, the switching circuit module further includes:

a first inverter, an input end of the first inverter is connected to an output end of the second voltage detecting module;

a second inverter, an input end of the second inverter is connected to an output end of the first inverter;

a second switching transistor, a gate of the second switching transistor is connected to an output end of the first inverter, and a drain of the second switching transistor is connected to the motion energy storage module;

a third switching transistor, a gate of the third switching transistor is connected to an output end of the second inverter, a drain of the third switching transistor is connected to the backup battery module; and the third switching transistor The source and the source of the second switching transistor are both connected to the supply voltage output.

According to a second aspect of the embodiments of the present invention, there is provided an electronic device comprising the above-described power supply circuit.

The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

By using energy supply combined with backup battery power supply, the base of power supply in existing electronic equipment In addition, a motion energy storage module is newly added, and the motion energy storage module converts the motion energy of the electronic device into electrical energy for storage, and the stored electrical energy is used to supply power to the electronic device, and the power supply circuit solves the prior art. The short-lived problem of electronic equipment existing in the system can effectively extend the running time of electronic equipment, save energy, and protect the environment.

Other features and advantages of the invention will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a

FIG. 1 is a block diagram of a power supply circuit of an electronic device, according to an exemplary embodiment.

FIG. 2 is a block diagram of a motion energy storage module of a power supply circuit of an electronic device, according to an exemplary embodiment.

FIG. 3 is a schematic diagram of a motion energy storage module and a switching circuit in a power supply circuit of an electronic device according to an exemplary embodiment.

detailed description

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The description below refers to the same or similar elements in the different drawings unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present aspects. Instead, they are merely examples of devices and methods consistent with aspects of the present aspects as detailed in the appended claims.

Referring to FIG. 1 , FIG. 1 is a block diagram of a power supply circuit of an electronic device according to an exemplary embodiment. As shown in FIG. 1 , the power supply circuit 100 of the electronic device includes a motion energy storage module 110 , a backup battery module 120 , and a switching circuit module 130 .

The motion energy storage module 110 is configured to convert kinetic energy generated by the electronic device by motion into electrical energy, and store the electrical energy to supply power to the electronic device;

The backup battery module 120 is configured to be a backup power source of the electronic device;

The switching circuit module 130 is configured to switch the motion energy storage module 110 or the backup battery module 120 to supply power to the electronic device.

The electronic device in the present invention may be a wearable device, which may be a smart bracelet, a smart watch, a smart glove, a smart ring, a smart wear, or the like. When the user wears the wearable device, the sports energy storage module 110 converts the kinetic energy generated by the wearable device into motion and converts it into electrical energy, and the stored electrical energy can be used to give the wearable device. The device is powered. The electronic device in the present invention may also be other types of electronic devices other than the wearable device. For example, when the electronic device is capable of generating vibration during operation, the motion energy storage module 110 may vibrate the electronic device. The generated kinetic energy is converted into electrical energy and stored, and the stored electrical energy can be used to power the electronic device.

The backup battery module 120 in the present invention may be a lithium battery, or may be other types of batteries such as graphene. The backup battery module 120 serves as a backup power source, and can supply power to the electronic device when the energy stored by the motion energy storage module 110 is insufficient.

For example, the switching circuit module 130 in the present invention can switch between power supply sources through a PMOS (positive channel metal oxide semiconductor) field effect transistor, thereby ensuring normal operation of the electronic device. Those skilled in the art will recognize that the use of PMOS is by way of example only, and it is apparent that NMOS can also be used in the present invention with a simple transformation.

The invention adds a motion energy storage module to the existing electronic device power supply by using the power supply technology combined with the backup battery power supply, and the motion energy storage module converts the motion energy of the electronic device The power is converted into electrical energy and stored, and the stored electrical energy is used to supply power to the electronic device. The power supply circuit solves the short-lived problem of the electronic device existing in the prior art, and can effectively extend the running time of the electronic device, thereby effectively saving Energy, green and environmental protection.

Optionally, when the power stored by the motion energy storage module 110 is less than a first preset value, the switching circuit module 130 is configured to switch to powering the electronic device by the backup battery module 120. The first preset value may be set by the electronic device, or may be manually set by a user. When the electrical energy stored by the motion energy storage module 110 is less than the first preset value, indicating that the electrical energy stored by the motion energy storage module 110 continues to be consumed, the stored electrical energy may not be guaranteed. The normal operation of the electronic device. Therefore, the switching circuit module 130 is switched to supply power to the electronic device by the backup battery module 120, thereby ensuring normal operation of the electronic device.

When the power stored by the motion energy storage module 110 is greater than or equal to the first preset value, the switching circuit module 130 is configured to switch to power the electronic device by the motion energy storage module 110. When the electrical energy stored by the motion energy storage module 110 is greater than or equal to the first preset value, indicating that the electrical energy stored by the motion energy storage module 110 supplies power to the electronic device, the The normal operation of electronic equipment. Therefore, the switching circuit module 130 is switched to supply power to the electronic device by the motion energy storage module 110, thereby effectively extending the running time of the electronic device, effectively saving energy, and being environmentally friendly.

Please refer to FIG. 2. FIG. 2 is a block diagram of a motion energy storage module of a power supply circuit of an electronic device according to an exemplary embodiment. As shown in FIG. 2, the motion energy storage module 110 includes a motion power generation module 111, a rectification and filtering circuit 112, a primary charging switch module 113, and a primary capacitor storage circuit 114.

The motion power generation module 111 is configured to convert kinetic energy generated by the electronic device by motion into an alternating current output.

The rectifying and filtering circuit 112 is configured to convert the alternating current output by the motion generating module 111 into a direct current output.

The primary charging switch module 113 is connected to the rectifying and filtering circuit 112. The primary charging switch module 113 is a hysteresis switching module having a hysteresis interval for intermittently charging the primary capacitor storage circuit 114.

The primary capacitor storage circuit 114 is configured to store the DC power output by the rectifier filter circuit 112 when the primary charging switch module 113 is in an on state. The primary charging switch module 113 is actually connected to the rectifying filter The filter capacitors in the wave circuit 112 are connected. For example, when the rectified voltage is greater than a first set value (for example, 4V), the primary charging switch module 113 is in an on state, and the primary capacitor storage circuit 114 is provided. Charging; if the rectified voltage is less than a second set value (such as 2V), then the primary charging switch module 113 is in an off state, and the primary capacitor storage circuit 114 is not charged.

The motion power generation module 111 converts kinetic energy into an AC power output, which can be achieved by, but not limited to, the following: an electronic device is used as a wearable smart watch, and the mobile power generation module 111 is provided with a weight; when the user wears When the smart watch is running, the weight swings with the movement of the smart watch; the hammer further drives the connected gear to rotate, and the gear further drives the connected conductor to cut the magnetic lines of force to generate electric current.

As shown in FIG. 2, the motion power generation module 111 outputs the converted alternating current to the rectification and filtering circuit 112, and the rectification and filtering circuit 112 converts the alternating current output by the motion generation module 111 into a direct current output. When the primary charging switch module 113 is in an on state, the direct current output by the rectifying and filtering circuit 112 is stored in the primary capacitor storage circuit 114. When the electrical energy stored by the primary capacitor storage circuit 114 is greater than or equal to the first predetermined value, the switching circuit module 130 switches to supply power to the electronic device by the primary capacitor storage circuit 114. Therefore, the kinetic energy of the electronic device is converted into electrical energy by the motion generating module 111, and the electrical energy is stored in the primary capacitor storage circuit 114, which can effectively extend the running time of the electronic device, save energy, and protect the environment. .

Referring to FIG. 2 , the motion energy storage module 110 includes a second generation charging switch module 115 and two in addition to the motion generating module 111 , the rectifying and filtering circuit 112 , the primary charging switch module 113 , and the primary capacitor storage circuit 114 . Level rechargeable battery 116.

The secondary charging switch module 115 is configured to switch to an on state when the primary capacitor storage circuit 114 is fully charged.

The secondary rechargeable battery 116 is configured to store the direct current output by the rectifying and filtering circuit 112 when the secondary charging switch module 115 is in an on state.

When the electrical energy stored by the primary capacitor storage circuit 114 is greater than the overflow value, the primary capacitor storage circuit 114 can no longer continue to store the electrical energy. At this time, if the electronic device is still in a moving state, the secondary charging switch module 115 is in an on state, and the electrical energy converted by the motion generating module 111 is stored in the secondary rechargeable battery 116, ensuring The effective collection and storage of energy in the case of motion makes the electrical energy converted by the motion generating module 111 not wasted in the case of motion.

Referring to FIG. 2, the motion energy storage module 110 further includes a first diode 117; an anode of the first diode 117 is connected to the secondary rechargeable battery 116, and the first diode 117 The cathode is connected to the primary capacitor storage circuit 114.

Optionally, the secondary rechargeable battery 116 can also supply the stored electrical energy to the primary capacitor storage circuit 114 through the first diode 117, thereby ensuring storage in the primary capacitor storage circuit 114. The electrical energy is greater than or equal to the preset value.

Referring to FIG. 2, the motion energy storage module 110 further includes: a first voltage detecting module 118, configured to detect a voltage output by the primary capacitor storage circuit 114, and the detected voltage value is greater than the second pre- When setting the value, An on signal is sent to the secondary charging switch module 115 to switch the secondary charging switch module 115 to an on state. After the secondary charging switch module 115 is switched to the conductive state, the electrical energy converted by the motion generating module 111 is stored in the secondary rechargeable battery 116, ensuring efficient collection and storage of energy under motion conditions. .

FIG. 3 is a schematic diagram of a motion energy storage module and a switching circuit in a power supply circuit of an electronic device according to an exemplary embodiment. In the embodiment shown in FIG. 3, the first voltage detecting module 118 is U1. The first diode 117 is A, the secondary rechargeable battery 116 is BT1, and the primary capacitor storage circuit 114 is a super capacitor C1. As shown in FIG. 3, the secondary charging switch module 115 includes a second diode B, a transistor Q2, a first switching transistor Q1, and the like.

The anode of the second diode B is connected to the primary charging switch module 113; the first charging switch module 113 collects the energy stored by the rectifying capacitor in the rectifying and filtering circuit 112 mainly through the switch. When the primary charging switch module 113 is in the on state, the energy stored by the rectifying capacitor in the rectifying and filtering circuit 112 can be stored in the secondary rechargeable battery BT1 through the second diode B.

The base of the transistor Q2 is coupled to the output of the first voltage detecting module U1. Alternatively, a resistor R1 can be connected in series between the base of the transistor Q2 and the output of the first voltage detecting module U1, and the transistor The base of Q2 is grounded through resistor R2, and the emitter of transistor Q2 is grounded through resistor R4.

The gate of the first switch transistor Q1 is connected to the collector of the transistor Q2, the source of the first switch transistor Q1 is connected to the cathode of the second diode B, and the first switch transistor Q1 The drain is coupled to the secondary rechargeable battery BT1. Optionally, a resistor R5 is connected in series between the drain of the first switch transistor Q1 and the secondary rechargeable battery BT1, and a resistor R3 is connected between the source and the gate of the first switch transistor Q1. .

The motion energy collecting device 310 in FIG. 3 corresponds to the set of the motion power generating module 111, the rectifying and filtering circuit 112, and the primary charging switch module 113 in FIG. The function of the primary charging switch module 113 is to intermittently charge the super capacitor C1. When the rectified voltage is greater than the first set value (for example, 4V), the primary charging switch module 113 is in an on state to charge the super capacitor C1; for example, when the rectified voltage is less than the second set value (eg When 2V), the primary charging switch module 113 is in an off state, and the super capacitor C1 is not charged.

The secondary rechargeable battery BT1 is used as a long-term storage battery for collecting energy. When the first voltage detecting module U1 detects that the voltage of the super capacitor C1 exceeds a certain value (for example, 3V), the output of the first voltage detecting module U1 is Is high level, so that the transistor Q2 is closed, the collector of the transistor Q2 is at a low level, so that the first switching transistor Q1 is closed, and the current passes through the second diode B and the first switching transistor Q1 as the secondary rechargeable battery. BT1 is charged, and the electric energy in the secondary rechargeable battery BT1 is recirculated to the super capacitor C1 through the first diode A, which ensures the fast start of the load circuit of the electronic device and ensures the energy collection. Effective storage.

Optionally, the switching circuit module includes: a second voltage detecting module.

The second voltage detecting module is configured to detect an actual voltage of the super capacitor C1 at the output end of the motion energy storage module, and send a signal for enabling the backup battery module when the detected actual voltage value is less than the target voltage value. Switching to supply power to the electronic device by the backup battery module; when the detected actual voltage value is greater than or equal to the target voltage value, transmitting a signal that enables the motion energy storage module to switch to Stored by the movement The energy module supplies power to the electronic device.

Referring to FIG. 3, in the embodiment shown in FIG. 3, the second voltage detecting module is U2, and the backup battery module is BT2. As shown in FIG. 3, the switching circuit module further includes:

a first inverter A1, an input end of the first inverter A1 is connected to an output end of the second voltage detecting module U2;

a second inverter A2, an input end of the second inverter A2 is connected to an output end of the first inverter A1;

a second switching transistor Q3, a gate of the second switching transistor Q3 is connected to an output end of the first inverter A1, and a drain of the second switching transistor Q3 is connected to a super of the motion storage module Capacitor C1;

a third switching transistor Q4, a gate of the third switching transistor Q4 is connected to an output end of the second inverter A2, and a drain of the third switching transistor Q4 is connected to the backup battery module BT2, The source of the three switching transistor Q4 and the source of the second switching transistor Q3 are both connected to the module supply voltage output terminal VOUT.

When the load system of the electronic device is in an operating state, and when the voltage in the super capacitor C1 is higher than a set value (such as 2.5V), the output of the second voltage detecting module U2 is at a high level. At this time, the first inverter A1 outputs a low level, the second inverter A2 outputs a high level, thereby closing the second switching transistor Q3, and the third switching transistor Q4 is off. On, the supercapacitor C1 supplies power to the load system of the electronic device. When the voltage across the super capacitor C1 is lower than a set value (for example, 2.5V), the output of the second voltage detecting module U2 is at a low level, and at this time, the output of the first inverter A1 is a high level. The second inverter A2 outputs a low level, so that the second switch tube Q3 is turned off, and the third switch tube Q4 is closed. At this time, the backup battery module BT2 is used to supply power to the electronic device. , thus achieving power switching in different states.

It is to be noted that the first, second and third switching transistors can be implemented by MOSFETs or by other equivalent electronic components or circuits having controlled switching characteristics.

The present invention also provides an electronic device including the above-described power supply circuit 100. Regarding the electronic device in this embodiment, the specific manner in which the power supply circuit 100 and the respective modules included in the power supply circuit 100 perform operations has been described in detail in the above embodiments, and will not be described in detail herein. Explain the explanation.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the embodiments described above, and various modifications may be made to the technical solutions of the present invention within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made as long as it does not deviate from the idea of the invention, and it should be regarded as the disclosure of the invention.

Claims

A power supply circuit for an electronic device, comprising:

a motion energy storage module, configured to convert kinetic energy generated by the electronic device by motion into electrical energy, and store the electrical energy to supply power to the electronic device;

Backup battery module;

And a switching circuit module connected to the motion energy storage module and the backup battery module for switching to power the electronic device by the motion energy storage module or the backup battery module.
The power supply circuit according to claim 1, wherein

The switching circuit module is configured to switch to powering the electronic device by the backup battery module when the power stored by the motion energy storage module is less than a first preset value;

And when the electrical energy stored by the motion energy storage module is greater than or equal to the first preset value, switching to powering the electronic device by the motion energy storage module.
The power supply circuit of claim 1 wherein said motion energy storage module comprises:

a motion power generation module, configured to convert kinetic energy generated by the electronic device by motion into an alternating current output;

a rectifying and filtering circuit, configured to convert the alternating current output by the motion generating module into a direct current output;

a primary charging switch module connected to the rectifying and filtering circuit;

The first-level capacitor storage circuit is connected to the rectifying and filtering circuit through the first-stage charging switch module, and is configured to store the direct current outputted by the rectifying and filtering circuit when the first-stage charging switch module is in an on state.
The power supply circuit of claim 3, wherein the motion energy storage module further comprises:

a secondary charging switch module, configured to switch to an on state when the primary capacitor storage circuit is fully charged;

The secondary rechargeable battery is connected to the rectifying and filtering circuit through the secondary charging switch module, and is configured to store the direct current output by the rectifying and filtering circuit when the secondary charging switch module is in an on state.
The power supply circuit according to claim 4, wherein said motion energy storage module further comprises a first diode; an anode of said first diode is connected to said secondary rechargeable battery, said first diode a cathode of the tube is connected to the primary capacitor storage circuit;

The secondary rechargeable battery is further configured to deliver stored electrical energy to the primary capacitor storage circuit through the first diode.
The power supply circuit according to claim 4 or 5, wherein the motion energy storage module further comprises:

a first voltage detecting module, configured to detect a voltage output by the primary capacitor storage circuit and detect the detected voltage When the voltage value is greater than the second preset value, the conduction signal is sent to the secondary charging switch module to switch the secondary charging switch module to the conductive state.
The power supply circuit according to any one of claims 4 to 6, wherein the secondary charging switch module comprises:

a second diode, an anode of the second diode is connected to the primary charging switch module;

a triode having a base connected to an output of the first voltage detecting module and an emitter grounded through a resistor;

a first switching transistor, a gate of the first switching transistor is connected to a collector of the triode, a source of the first switching transistor is connected to a cathode of the second diode, and the first switching transistor The drain is coupled to the secondary rechargeable battery.
The power supply circuit of claim 1 wherein said switching circuit module comprises:

a second voltage detecting module, configured to detect an actual voltage output by the motion storage module, and send a signal that enables the backup battery module to switch to a location when the detected actual voltage value is less than a target voltage value The backup battery module supplies power to the electronic device; when the detected actual voltage value is greater than or equal to the target voltage value, transmitting a signal that enables the motion energy storage module to switch to being stored by the motion The energy module supplies power to the electronic device.
The power supply circuit of claim 8, wherein the switching circuit module further comprises:

a first inverter, an input end of the first inverter is connected to an output end of the second voltage detecting module;

a second inverter, an input end of the second inverter is connected to an output end of the first inverter;

a second switching transistor, a gate of the second switching transistor is connected to an output end of the first inverter, and a drain of the second switching transistor is connected to the motion energy storage module;

a third switching transistor, a gate of the third switching transistor is connected to an output end of the second inverter, a drain of the third switching transistor is connected to the backup battery module; and the third switching transistor The source and the source of the second switch are both connected to the supply voltage output.
A power supply circuit according to any one of claims 7-9, wherein said first, second and third switching transistors are MOSFETs.
An electronic device comprising the power supply circuit of any one of claims 1 to 10.