An adaptive kinetic energy recovery control circuit and method

Abstract

The present invention provides an adaptive dynamic energy recovery control circuit and method, the method comprising: a voltage monitoring circuit acquires an energy recovery source voltage, converts the energy recovery source voltage into a logic level, and sends the logic level to a second pin of the main control chip; the second pin wakes up the main control chip according to the logic level, and after the main control chip wakes up, the energy recovery circuit is activated through the first pin to charge a charging and discharging device; the main control chip sends a control signal to the first pin according to the charging state of the charging and discharging device to control the working state of the energy recovery circuit; the main control chip adjusts the output state of the first pin of the main control chip and its own sleep state according to the level state of the second pin and the input voltage obtained from the third pin, thereby realizing adaptive dynamic energy recovery.

Description

Technical Field

[0001] The present invention relates to the field of energy recovery technology, and in particular to an adaptive kinetic energy recovery control circuit and method. Background Art

[0002] Currently, devices including but not limited to electronic tags, remote controls, electronic beacons, electronic table signs, electronic advertising screens, etc. require relevant energy recovery.

[0003] Currently, the existing energy recovery circuits and control methods have high power consumption and large leakage current. In particular, the related main control chip maintains high power consumption under different external energy stimuli, and cannot automatically shut down charging when the energy recovery is low and automatically start charging when the energy recovery is high, which reduces the leakage current of the energy recovery circuit and improves the charging efficiency.

[0004] In addition, the current mainstream energy recovery control main control chip also has a certain leakage current when in sleep mode, which reduces the efficiency of energy recovery. Summary of the Invention

[0005] One of the inventive purposes of the present invention is to provide an adaptive dynamic energy recovery control circuit and method, wherein the circuit and method are configured with a voltage monitoring circuit in relevant equipment requiring energy recovery, wherein the voltage monitoring circuit is connected to an internal energy recovery source or an energy recovery source for voltage monitoring, and the voltage monitoring circuit is used to convert the induced voltage of the energy recovery source into a logic level, and the working state of the corresponding energy recovery circuit is controlled by the logic level, so that the energy recovery circuit can operate at a lower overall power consumption, thereby improving the durability of the energy recovery circuit.

[0006] Another object of the present invention is to provide an adaptive dynamic energy recovery control circuit and method, wherein the circuit and method are configured with a main control chip and a diode with ultra-low reverse leakage current, wherein the output power supply of the main control chip and the diode with ultra-low reverse leakage current are reversely connected, so that the main control chip power supply will not leak to the energy recovery circuit, reducing the supercapacitor damage caused by the continuous leakage of the main control chip power supply to the energy recovery system, and improving the service life of the energy recovery circuit.

[0007] Another object of the present invention is to provide an adaptive dynamic energy recovery control circuit and method, wherein the circuit and method monitor the voltage of the internal energy recovery source or the energy recovery source through the voltage monitoring circuit. When the voltage of the internal energy recovery source or the energy recovery source is less than a certain value, the logic level is sent to the main control chip to perform a low-voltage interrupt operation, and the relevant pins of the main control chip float to enter a low-power consumption stage, thereby greatly reducing the power consumption waste of the main control chip as a whole.

[0008] In order to achieve at least one of the above-mentioned objects, the present invention further provides an adaptive kinetic energy recovery control circuit, the circuit comprising:

[0009] Energy recovery source;

[0010] Main control chip;

[0011] Energy recovery circuit;

[0012] Voltage monitoring circuit;

[0013] charging and discharging device;

[0014] Ultra-low reverse leakage current diode;

[0015] The energy recovery source includes photovoltaic energy, weak magnetic energy, thermal power energy, vibration energy, radio frequency energy, and waste electrical energy. The energy recovery source obtains weak electrical energy through conversion, or has weak electrical energy itself.

[0016] The main control chip includes a first pin, a second pin, a third pin, and a main control chip input power supply;

[0017] The energy recovery circuit is an energy conversion circuit that uses a boost circuit to increase a weak voltage to a usable voltage range and achieves the highest efficiency through maximum power point tracking;

[0018] The voltage monitoring circuit converts the analog voltage of the input terminal into a logic signal through a voltage comparator and outputs it to the output terminal: when the input terminal voltage is lower than the first voltage monitoring threshold, the circuit outputs a high level; when the input terminal voltage is higher than the first voltage monitoring threshold, the circuit outputs a low level;

[0019] The charging and discharging device includes a common capacitor, a supercapacitor, and a rechargeable battery for storing electrical energy;

[0020] The ultra-low reverse leakage current diode is a diode with a reverse leakage current of <10pA, which is used to prevent the electricity of the charging and discharging device from leaking to the energy recovery circuit when not charging; during charging or over-discharging, the output current of the energy recovery circuit can be charged to the charging and discharging device through the diode.

[0021] The first pin of the main control chip is connected to the output terminal of the energy recovery circuit, the second pin is connected to the output terminal of the voltage monitoring circuit, and the third pin is connected to the input terminal of the voltage monitoring control circuit. The ultra-low reverse leakage current diode is connected between the main control chip and the energy recovery circuit, and the energy recovery source is connected to the input terminal of the energy recovery circuit and the voltage monitoring circuit.

[0022] According to one of the preferred embodiments of the present invention, the power terminal of the main control chip and the power terminal of the voltage monitoring circuit are connected to the positive electrode of the charging and discharging device, the output terminal of the energy recovery circuit is connected to the positive electrode of the charging and discharging device after passing through the ultra-low reverse leakage current diode, and the corresponding ground terminals of the main control chip and the energy recovery circuit are both connected to the negative electrode of the charging and discharging device.

[0023] According to one of the preferred embodiments of the present invention, the energy recovery circuit includes an input terminal and an output terminal, wherein the input terminal of the energy recovery circuit is connected to the energy recovery source, the output terminal is connected to the first pin of the main control chip, and is connected to the charging and discharging device after passing through the ultra-low reverse leakage current diode.

[0024] According to another preferred embodiment of the present invention, the voltage monitoring circuit includes an input terminal, an output terminal and a power terminal, the input terminal is connected to the energy recovery source, the output terminal is connected to the second pin of the main control chip, and the power terminal of the voltage monitoring circuit is connected to the positive pole of the charging and discharging device.

[0025] In order to achieve at least one of the above-mentioned objects, the present invention further provides an adaptive kinetic energy recovery control method, the method comprising:

[0026] The voltage monitoring circuit obtains the energy recovery source voltage, converts the energy recovery source voltage into a logic level, and sends the logic level to the second pin of the main control chip;

[0027] The second pin of the main control chip wakes up the main control chip according to the logic level, and after the main control chip wakes up, it activates the energy recovery circuit through the first pin to charge the charging and discharging device;

[0028] The main control chip sends a control signal to the first pin according to the charging state of the charging and discharging device, so as to control the working state of the energy recovery circuit;

[0029] The main control chip adjusts the output state of the first pin of the main control chip and its own sleep state according to the level state of the second pin and the input voltage obtained from the third pin, thereby realizing adaptive kinetic energy recovery.

[0030] According to another preferred embodiment of the present invention, the voltage monitoring circuit sets a first voltage monitoring threshold. When the voltage monitoring circuit obtains that the energy recovery source voltage is greater than the first voltage monitoring threshold, the voltage monitoring circuit generates the logic level, wherein the logic level includes a preset high level and a low level. When the energy recovery source voltage is greater than the first voltage monitoring threshold, a low level logic level is generated, and the low level logic level wakes up the main control chip through the second pin.

[0031] According to another preferred embodiment of the present invention, when the main control chip is in the awake state, the main control chip generates a high level at the first pin, and the high level generated by the first pin activates the energy recovery circuit. The activated energy recovery circuit charges the charging and discharging device.

[0032] According to another preferred embodiment of the present invention, the main control chip obtains the charging status of the charging and discharging device in real time. When it is detected that the charging and discharging device is in a fully charged state, the main control chip generates a low level at the first pin. The low level of the first pin is used to turn off the energy recovery circuit from charging the charging and discharging device.

[0033] According to another preferred embodiment of the present invention, the main control chip sets a second voltage monitoring threshold, wherein the second voltage monitoring threshold is less than the first voltage monitoring threshold. When the third pin of the main control chip collects the energy recovery source voltage which is less than the second voltage monitoring threshold, the main control chip sets the first pin to a floating state, and sets the second pin to an interrupt input state, and puts itself into a low power consumption state.

[0034] The present invention further provides an adaptive kinetic energy recovery control circuit, wherein the main control chip is a SoC chip, which includes a central processing unit (CPU), memory (RAM), a storage controller, a multimedia codec, Bluetooth communication function, and an input and output interface. The software corresponding to the adaptive kinetic energy recovery control method is executed on the main control chip to implement the above-mentioned adaptive kinetic energy recovery control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shown is a schematic diagram of the connection structure of an adaptive kinetic energy recovery control circuit of the present invention.

[0036] Figure 2 Shown is a flow chart of an adaptive kinetic energy recovery control method of the present invention.

[0037] Figure 3 Shown is a flow chart of the main control chip changing from a dormant state to an activated charging state in the control method of the present invention.

[0038] Figure 4 Shown is a schematic diagram of the process of the main control chip changing from a charging state to a sleep state in the control method of the present invention.

[0039] Figure 5 Shown is a flow chart of abnormal state detection and processing of the main control chip during use in the control method of the present invention. DETAILED DESCRIPTION

[0040] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0041] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0042] Please refer to Figure 1-Figure 5 The present invention discloses an adaptive kinetic energy recovery control circuit and method, wherein the circuit includes the following components: a main control chip, an energy recovery circuit, a voltage monitoring circuit, a charge-discharge device, and a diode with ultra-low reverse leakage current; wherein the main control chip includes multiple control pins, each of which is used to receive a voltage monitoring circuit signal and control the energy recovery circuit state. Furthermore, the main control chip also determines whether the current main control chip needs to be activated or enter a low-power state based on the voltage of the energy recovery source. Therefore, the present invention can achieve efficient and low-power adaptive kinetic energy recovery through the multiple control pins of the above-mentioned main control chip.

[0043] For details, please refer to Figure 1 The circuit structure shown includes an energy recovery source, a main control chip, an energy recovery circuit, a voltage monitoring circuit, a charge and discharge device, and a diode with ultra-low reverse leakage current, wherein the main control chip includes a first pin GPIO1, a second pin GPIO2, a third pin GPIO3, and a main control chip output power supply VCC3, wherein the energy recovery circuit includes an input terminal and an output terminal OUT2, wherein the output terminal OUT2 of the energy recovery circuit is connected to the charge and discharge device and the main control chip, the first pin GPIO1 is connected to the energy recovery circuit output terminal OUT2, the second pin GPIO2 is connected to the voltage monitoring circuit output terminal OUT1, and the voltage monitoring circuit output terminal OUT1 outputs a logic level according to the voltage of the energy recovery source, wherein the second pin GPIO2 is used as a wake-up source according to the received logic level, and the third pin GPIO3 is connected to the positive pole of the energy recovery source. It should be noted that the voltage monitoring control circuit input terminal includes a positive input terminal V + and the negative input terminal V - , the voltage monitoring control circuit positive input terminal V + and the negative input terminal V -Used to connect the corresponding positive and negative electrodes of the energy recovery source. It should be noted that the energy recovery source in the present invention includes but is not limited to photovoltaic energy, weak magnetic energy, thermoelectric energy, vibration energy, radio frequency energy, and waste electricity. The charging and discharging device in the present invention includes but is not limited to ordinary capacitors, supercapacitors, and rechargeable batteries. The present invention will not elaborate on this in detail.

[0044] The energy recovery circuit includes a positive input terminal and a negative input terminal, and the positive input terminal of the voltage monitoring circuit is connected to the positive input terminal of the energy recovery circuit, while the negative input terminal of the voltage monitoring circuit is connected to the negative input terminal of the energy recovery circuit. This allows the voltage of the energy recovery source to be monitored by both the voltage monitoring circuit and the energy recovery circuit. The present invention utilizes the voltage monitoring circuit to convert the monitored voltage of the energy recovery source into a specified logic level, and wakes up the main control chip after the second pin GPIO2 of the main control chip receives the relevant logic level. The awakened main control chip further performs relevant energy recovery control and its own power consumption control operations.

[0045] Please continue to refer to Figure 1 The circuit connection structure further includes: the power terminal VCC3 of the main control chip, the power terminal VCC1 of the voltage monitoring circuit, and the output terminal OUT2 of the energy recovery circuit are all connected to the positive electrode of the charging and discharging device through an ultra-low reverse leakage current diode D1, and the negative electrode of the charging and discharging device is respectively connected to the ground terminal GND2 of the energy recovery circuit and the ground terminal GND3 of the main control chip. The V- inside the energy recovery circuit is connected to GND2, wherein the positive electrode of the ultra-low reverse leakage current diode D1 is connected to the output terminal OUT2 of the energy recovery circuit, and the negative electrode of the ultra-low reverse leakage current diode D1 is connected to the positive electrode of the charging and discharging device. In this circuit structure, when the energy recovery circuit no longer performs energy recovery, the current flowing from the charging and discharging device to the energy recovery circuit is cut off due to the unidirectional conductive characteristics of the ultra-low reverse leakage current diode D1. The cut-off leakage current is less than 10pA, thereby effectively preventing leakage of the energy recovery circuit and improving the standby time.

[0046] It is worth mentioning that, based on the above circuit structure, the present invention further utilizes the relevant control program of the main control chip to execute the following adaptive kinetic energy recovery control method, which mainly includes:

[0047] The voltage monitoring circuit obtains the energy recovery source voltage, converts the energy recovery source voltage into a logic level, and sends the logic level to the second pin GPIO2 of the main control chip;

[0048] The second pin GPIO2 wakes up the main control chip according to the logic level, and after the main control chip wakes up, it activates the energy recovery circuit through the first pin to charge the charging and discharging device;

[0049] The main control chip sends a control signal to the first pin GPIO1 according to the charging state of the charging and discharging device, so as to control the working state of the energy recovery circuit;

[0050] The main control chip adjusts the output state of the first pin GPIO1 of the main control chip and its own sleep state according to the level state of the second pin GPIO2 and the input voltage obtained by the third pin GPIO3, thereby realizing adaptive kinetic energy recovery.

[0051] Furthermore, the main control chip wake-up operation includes: the voltage monitoring circuit sets a first voltage monitoring threshold; when the voltage monitoring circuit obtains that the energy recovery source voltage is greater than the first voltage monitoring threshold, the voltage monitoring circuit generates the logic level, wherein the logic level includes a preset high level and a preset low level; when the energy recovery source voltage is greater than the first voltage monitoring threshold, a low level logic level is generated, and the low level logic level is set to wake up the main control chip via the second pin GPIO2. When the logic level is high, the main control chip is no longer woken up.

[0052] Furthermore, the method for controlling the energy recovery circuit after the main control chip wakes up includes: when the main control chip is in the awake state, the main control chip determines whether to charge based on the voltage level of the charging and discharging device; if charging is to be performed, a high level is generated at the first pin, and the high level generated by the first pin GPIO1 activates the energy recovery circuit, and the activated energy recovery circuit charges the charging and discharging device. If not charging, a low level is generated at the first pin, and the low level generated by the first pin GPIO1 disables the output of the energy recovery circuit, preventing it from charging the charging and discharging device.

[0053] Furthermore, the method for the main control chip to enter low power consumption includes: the main control chip sets a second voltage monitoring threshold, wherein the second voltage monitoring threshold is less than the first voltage monitoring threshold, so as to form a hysteresis circuit to avoid repeated flipping at the zero boundary point. When the voltage of the energy recovery source is less than the second voltage monitoring threshold, a low-voltage interrupt signal is generated on the third pin GPIO3 of the main control chip, and the main control chip sets the first pin GPIO1 to floating and the second pin GPIO2 to interrupt input, and causes the main control chip to enter a low power consumption state. It should be noted that when the main control chip enters the ultra-low power consumption state, the final overall machine loss is <100nA.

[0054] In another preferred embodiment of the present invention, since the main control chip also includes other functions, such as the Bluetooth connection function of the electronic tag, the infrared transmission function of the remote control, the wireless transmission function of the electronic beacon, the image refresh function of the electronic table sign and the electronic advertising screen, etc., when the device itself is overused and undervoltage occurs, the main control chip automatically shuts down other functions and only retains the charging logic.

[0055] In another preferred embodiment of the present invention, when the charging and discharging device is over-discharged, all functions of the main control chip are turned off, and the control pins GPIO1 and GPIO2 and the collection pin GPIO3 are set to floating. If there is a large external energy input, since the energy recovery circuit is not disabled, its output current is charged to the rechargeable device through the ultra-low reverse leakage current diode.

[0056] In the embodiments disclosed herein, the processes described above with reference to the flowcharts can be implemented as embedded software programs. The embodiments disclosed herein include an embedded software program product that can execute a corresponding adaptive kinetic energy recovery control method on a SoC chip or a single-chip microcomputer. The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of the systems, methods, and embedded program products according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or portion of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the drawings. For example, two boxes shown in succession can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, as well as combinations of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified functions or operations, or can be implemented using a combination of dedicated hardware and embedded software instructions.

[0057] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the implementation methods of the present invention may be subject to any deformation or modification.

Claims

1. An adaptive kinetic energy recovery control method, characterized in that: The method comprises: The voltage monitoring circuit obtains the energy recovery source voltage, converts the energy recovery source voltage into a logic level, and sends the logic level to the second pin of the main control chip; The second pin of the main control chip wakes up the main control chip according to the logic level, and after the main control chip wakes up, the energy recovery circuit is activated through the first pin to charge the charging and discharging device; The main control chip sends a control signal to the first pin according to the charging state of the charging and discharging device, so as to control the working state of the energy recovery circuit; The main control chip adjusts the output state of the first pin of the main control chip and its own sleep state according to the level state of the second pin and the input voltage obtained by the third pin, thereby realizing adaptive kinetic energy recovery.

2. The adaptive kinetic energy recovery control method according to claim 1, characterized in that: The voltage monitoring circuit sets a first voltage monitoring threshold. When the voltage monitoring circuit obtains that the energy recovery source voltage is greater than the first voltage monitoring threshold, the voltage monitoring circuit generates the logic level, wherein the logic level includes a preset high level and a low level. When the energy recovery source voltage is greater than the first voltage monitoring threshold, a low level logic level is generated, and the low level logic level wakes up the main control chip through the second pin.

3. The adaptive kinetic energy recovery control method according to claim 2, characterized in that: When the main control chip is in the awake state, the main control chip generates a high level at the first pin, and the high level generated by the first pin activates the energy recovery circuit. The activated energy recovery circuit charges the charging and discharging device.

4. The adaptive kinetic energy recovery control method according to claim 1, characterized in that: The main control chip obtains the charging status of the charging and discharging device in real time. When it is detected that the charging and discharging device is in a full state, the main control chip generates a low level at the first pin. The low level of the first pin is used to turn off the energy recovery circuit from charging the charging and discharging device.

5. The adaptive kinetic energy recovery control method according to claim 2, characterized in that: The main control chip sets a second voltage monitoring threshold, wherein the second voltage monitoring threshold is less than the first voltage monitoring threshold. When the third pin of the main control chip detects that the energy recovery source voltage is less than the second voltage monitoring threshold, the main control chip sets the first pin to a floating state, sets the second pin to an interrupt input state, and puts itself into a low power consumption state.

6. An adaptive kinetic energy recovery control circuit, characterized in that: The circuit comprises: Energy recovery sources; Main control chip; Energy recovery circuit; Voltage monitoring circuit; Charging and discharging device; Ultra-low reverse leakage current diode; The energy recovery source includes photovoltaic energy, weak magnetic energy, thermal power energy, vibration energy, radio frequency energy, and waste electric energy, and the energy recovery source obtains electric energy through conversion or has electric energy itself; The main control chip includes a first pin, a second pin, a third pin, and a main control chip input power supply; The energy recovery circuit is an energy conversion circuit that increases the low voltage to a usable voltage range through a boost circuit and achieves the highest efficiency through maximum power point tracking; The voltage monitoring circuit converts the analog voltage of the input terminal into a logic signal and outputs it to the output terminal through a voltage comparator: when the input terminal voltage is lower than the first voltage monitoring threshold, it outputs a high level, and when the input terminal voltage is higher than the first voltage monitoring threshold, it outputs a low level; The charging and discharging device includes a common capacitor, a super capacitor, and a rechargeable battery for storing electrical energy; The ultra-low reverse leakage current diode is a diode with a reverse leakage current of <10pA, which is used to prevent the electricity of the charging and discharging device from leaking to the energy recovery circuit when not charging; during charging and over-discharging, the output current of the energy recovery circuit can be charged to the charging and discharging device through the diode; The first pin of the main control chip is connected to the output terminal of the energy recovery circuit, the second pin is connected to the output terminal of the voltage monitoring circuit, the third pin is connected to the input terminal of the voltage monitoring control circuit, the positive electrode of the ultra-low reverse leakage current diode is connected to the output terminal of the energy recovery circuit, and the negative electrode is connected to the charging and discharging device, and the energy recovery source is connected to the input terminals of the energy recovery circuit and the voltage monitoring circuit.

7. The adaptive kinetic energy recovery control circuit according to claim 6, characterized in that: The power terminal of the main control chip and the power terminal of the voltage monitoring circuit are connected to the positive electrode of the charging and discharging device, the output terminal of the energy recovery circuit is connected to the positive electrode of the charging and discharging device after passing through the ultra-low reverse leakage current diode, and the corresponding ground terminals of the main control chip and the energy recovery circuit are both connected to the negative electrode of the charging and discharging device.

8. The adaptive kinetic energy recovery control circuit according to claim 7, characterized in that: The energy recovery circuit comprises an input terminal and an output terminal, wherein the input terminal of the energy recovery circuit is connected to an energy recovery source, the output terminal is connected to a first pin of the main control chip, and is connected to the charging and discharging device after passing through the ultra-low reverse leakage current diode.

9. The adaptive kinetic energy recovery control circuit according to claim 8, characterized in that: The voltage monitoring circuit includes an input terminal, an output terminal and a power terminal. The input terminal is connected to an energy recovery source, the output terminal is connected to the second pin of the main control chip, and the power terminal of the voltage monitoring circuit is connected to the positive electrode of the charging and discharging device.

10. An adaptive kinetic energy recovery control circuit, characterized in that: The main control chip is a SoC chip, which includes a central processing unit CPU, a memory RAM, a storage controller, a multimedia codec, a Bluetooth communication function, and an input and output interface. The software corresponding to the adaptive kinetic energy recovery control method is executed on the main control chip to implement any one of the adaptive kinetic energy recovery control methods in claims 1-5 above.

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