WO2018112750A1

WO2018112750A1 - Micro-energy collection-based power management method and device, and micro-energy supply device

Info

Publication number: WO2018112750A1
Application number: PCT/CN2016/111066
Authority: WO
Inventors: 华建武
Original assignee: 深圳市浩博高科技有限公司
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2018-06-28
Also published as: CN108521837A; CN108521837B

Abstract

A micro-energy collection-based power management method and device, and a micro-energy supply device. The SOC-based method comprises: selecting a collection mode according to a current power source electric quantity and a current collected electric quantity for micro-energy collection (S101); setting a communication threshold and a load threshold (S102); regularly determining whether the current power source electric quantity is greater than the communication threshold or not according to a timestamp, and communicating with a server when the current power source electric quantity is greater than the communication threshold (S103); and regularly determining whether the current power source electric quantity is greater than the load threshold or not, and supplying power to the load when the current power source electric quantity is greater than the load threshold (S104). A power management system is established on SOC on the basis of the existing IC, and the power consumption is further reduced by setting power priority to be suitable for power supply limit for micro-energy collection, achieving power management of micro-amps-level power consumption, increasing the application scope of energy collection, breaking environmental restrictions for energy collection, and expands the application field of clean energy.

Description

Instruction manual

Title of Invention: Power Management Method, Device and Micro Energy Supply Device Based on Micro Energy Energy Set

Technical field

[0001] The present invention belongs to the field of electronics, and in particular, to a power management method, device, and micro energy power supply based on micro energy harvesting.

Background technique

[0002] At present, new types of clean energy sources, such as solar energy, wind energy, and fluid energy, have shown more and more advantages over traditional energy sources, and thus have received more and more attention.

[0003] In an energy harvesting system, it is necessary to optimize the acquisition control, communication transmission, and output power by managing the stored electrical energy. However, the current power management methods are implemented by the MCU, but the operating current of one MCU. It is tens of milliamps. This power consumption has no problem for large-scale ordinary energy harvesting. However, for micro-energy harvesting, only micro-ampere-level current is generated after each energy conversion, and the power supply requirement of the MCU cannot be guaranteed at all. As a result, energy harvesting and application cannot be performed in many environments with weak energy, which limits the application of many technologies.

technical problem

[0004] An object of the embodiments of the present invention is to provide a power management method based on micro energy collection, which aims to solve the problem that the existing power management technology consumes too much power and cannot be applied to micro energy collection, which causes the load application to be limited by the environment. .

Problem solution

Technical solution

[0005] The embodiment of the present invention is implemented by a power management method based on micro energy collection, and the method is performed by using an SOC established on an MCU, where the method includes the following steps:

[0006] Selecting an acquisition mode according to a current power supply quantity and a current collection power quantity for micro energy collection, the acquisition mode includes at least a low power consumption acquisition mode and a high efficiency acquisition mode;

[0007] setting a communication threshold and a load threshold, the communication threshold being less than the load threshold; [0008] determining, according to the inter-turn stamp, whether the current power source is greater than a communication threshold, and communicating with the server when the current power source is greater than a communication threshold;

[0009] Determine whether the current power supply is greater than the load threshold, and supply power to the load when the current power is greater than the load threshold.

[0010] Another object of the embodiments of the present invention is to provide a power management device based on micro-energy acquisition, the device is established on an SOC, and the device includes:

[0011] an acquisition unit, configured to select an acquisition mode according to a current power source and a current collection power to perform micro energy collection, where the acquisition mode includes at least a low power collection mode and a high efficiency acquisition mode;

[0012] a threshold setting unit, configured to set a communication threshold and a load threshold, where the communication threshold is smaller than the load threshold;

[0013] The first determining unit is configured to determine, according to the inter-turn stamp, whether the current power source is greater than a communication threshold, and determine whether the current power source is greater than a load threshold;

[0014] a communication unit, configured to communicate with the server when the current power source is greater than the communication threshold.

[0015] The power supply unit is configured to supply power to the load when the current power source is greater than the load threshold.

Another object of embodiments of the present invention is to provide a micro energy power supply including the above-described micro energy harvesting based power management device.

Advantageous effects of the invention

Beneficial effect

[0017] The embodiment of the present invention establishes a power management system based on an existing IC on the SOC, and further reduces power consumption by setting a power supply priority, and is applicable to power supply limitation of micro energy collection, thereby realizing power management of micro-ampere power consumption. Increase the scope of energy harvesting, break through the environmental limitations of energy harvesting, and expand the application of clean energy.

Brief description of the drawing

DRAWINGS

1 is a schematic structural diagram of a power management method based on micro energy collection according to an embodiment of the present invention; [0019] FIG. 2 is a flowchart of step S101 in a power management method based on micro energy collection according to an embodiment of the present invention; Structure diagram

3 is a structural diagram of a power management apparatus based on micro energy collection according to an embodiment of the present invention; Embodiments of the invention

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Further, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0023] The embodiment of the present invention establishes a power management system based on an existing IC on the SOC, and further reduces power consumption by setting a power supply priority, and is suitable for power supply limitation of micro energy collection, and realizes power management of micro-ampere power consumption. Increase the scope of energy harvesting, break through the environmental limitations of energy harvesting, and expand the application of clean energy.

1 shows a flow structure of a power management method based on micro energy harvesting provided by an embodiment of the present invention. For the convenience of description, only parts related to the present invention are shown.

[0025] As an embodiment of the invention, the method can be applied to the collection of light energy, wind energy, fluid energy and pressure kinetic energy, and is particularly suitable for collecting micro-energy micro-energy collection management with small electric quantity, and can be combined Internet of Things or operators for data statistics and remote control.

The power management method based on the micro energy harvesting is performed by the SOC established on the MCU, and includes the following steps:

[0027] In step S101, the acquisition mode is selected according to the current power source and the current collected power for micro-energy acquisition, and the acquisition mode includes at least a low-power acquisition mode and a high-efficiency acquisition mode;

[0028] In the embodiment of the present invention, the SOC may be established on the MCU to collect weak electric energy, and it is worth noting that

The SOC here includes a general-purpose MCU, a system built on the MCU, and a necessary external device of the chip. The SOC establishes a system on a general-purpose MCU, enables a general-purpose MCU to have a specific function, and optimizes the function more easily. The burst cycle is shorter.

[0029] Since the collected power is relatively weak, it is necessary to activate a corresponding acquisition mode for micro energy collection. For example, if the current collected power is relatively low, and the current power supply is not sufficient, the low-power acquisition mode with lower power consumption is used for acquisition, and in the current collected power, the high-efficiency acquisition with higher acquisition efficiency can be selected. The way to accumulate power faster. [0030] The low-power acquisition mode works in the working mode of the MCU sleep, and sets the frequency of wake-up by controlling the number and width of the boosted pulses collected;

[0031] The high-efficiency acquisition mode can be controlled by MPPT control, the optimal parameter and the optimal power consumption balance voltage point are selected by the MPPT, and the weak electric energy is collected according to the optimal parameter and the optimal power consumption balance voltage point.

[0032] As a preferred embodiment of the present invention, in step S101, the current power source can be determined by detecting the current power source voltage, and the current power collection amount can be determined by detecting the input current, the input voltage, or the input charge.

[0033] For example, the current acquisition mode may be determined according to the voltage in the current electrical energy storage unit. If the current power is low, the detection frequency may be lowered, that is, the acquisition mode is not frequently changed, thereby reducing power consumption;

[0034] If the current power is high, the detection frequency can be increased, that is, the acquisition mode more suitable for the current environment is continuously replaced, thereby increasing the collection efficiency.

[0035] In step S102, setting a communication threshold and a load threshold;

[0036] In step S103, determining whether the current power source is greater than a communication threshold according to the time stamp, and communicating with the server when the current power source is greater than the communication threshold;

[0037] In the embodiment of the present invention, the current power source can be determined according to the time stamp, or the current power source can be determined by the preset frequency, and the current battery meets the communication condition, communicates with the server, and performs data interaction. The data interaction includes uploading the collected data to the server, identifying an update instruction on the server, sending an update request to the server, and downloading the update data from the server to reconfigure the acquisition criteria based on the acquired update data.

[0038] Of course, for the first time communication, the first time communication can be communicated through a preset default time stamp.

[0039] In step S104, it is determined whether the current power source is greater than a load threshold, and the current power is greater than the load threshold to supply power to the load.

[0040] In the embodiment of the present invention, the power supply priorities are: acquisition, communication, and load power supply. After the current power can bear the power consumption of the acquisition task, the communication power is supplied, and the power output of the communication is satisfied only after the current power can satisfy the power consumption requirement of the communication. After the current power is insufficient to meet the power consumption requirements of the current communication, the communication can be delayed by extending the inter-frame stamp, or the frequency of communication can be reduced.

[0041] Preferably, in step S103, after communicating with the server, further determining whether the current power source is low At a preset lower communication threshold, the lower communication threshold is lower than the communication threshold;

[0042] If yes, the communication is interrupted, and the breakpoint data is recorded for communication again, and the data transmission is continued according to the breakpoint data;

[0043] If no, the communication is maintained.

[0044] In the embodiment of the present invention, if the communication power suddenly drops below the preset value and the current communication demand cannot be guaranteed, the communication is interrupted, and the power-off data is saved, and the power is restored to the preset value. , continue to complete the data interaction based on the breakpoint data.

[0045] The embodiment of the present invention establishes a power management system based on an existing IC on the SOC, and further reduces power consumption by setting a power supply priority, and is applicable to power supply limitation of micro energy collection, thereby realizing power management of micro-ampere power consumption. Increase the scope of energy harvesting, break through the environmental limitations of energy harvesting, and expand the application of clean energy.

2 shows a flow chart of the step S101 in the power management method based on the micro energy collection according to the embodiment of the present invention. For the convenience of description, only parts related to the present invention are shown.

[0047] Step S101: The specific steps of selecting the acquisition mode to perform micro energy collection according to the current power source and the currently collected power amount are as follows:

[0048] In step S201, it is determined whether the currently collected power is greater than the first collection threshold;

[0049] executing step S202 to select a high efficiency acquisition mode;

[0050] If no, step S203 is performed to determine whether the current power is greater than the second collection threshold;

[0051] returning to step S202 to select a high efficiency acquisition mode;

[0052] If no, step S204 is performed to select a low power consumption acquisition mode.

[0053] The first collection threshold and the second collection threshold may be set according to actual requirements, for example, the first acquisition threshold is set to acquire a current value or a voltage value corresponding to the conversion of 50 mA, and the second collection threshold is set as a battery. The power supply voltage value or current value corresponding to 20% of the power.

[0054] In the embodiment of the present invention, the current collected power is preferentially determined. If the current collection capability is weak, but the battery still stores more power, the high-efficiency collection may still be used, if the current battery stores the power. Not too much, converted to low power acquisition.

[0055] As a preferred embodiment of the present invention, after step S203, but not limited to before step S204, the following steps may be further included: [0056] In step S205, it is determined whether the current power source amount is within the preset interval or the plurality of time intervals continuously exceed the second collection threshold;

[0057] If no, step S206 is performed to enter a sleep state, and only the low power consumption acquisition mode is retained;

[0058] If yes, step S207 is performed to switch to the awake state, and the high efficiency acquisition mode is selected.

[0059] In the embodiment of the present invention, when the current power is at an unstable threshold (second acquisition threshold), the current state is unstable. If the switching state is frequently switched, more power is consumed, so the device can temporarily enter the sleep state. Keep the low-power acquisition mode to continue the micro-energy acquisition until the power supply has increased greatly, no longer float near the critical value, and then wake up the system to enter the high-efficiency acquisition mode. Because of the large amount of power, it can be switched to Collect more efficient mode acquisition.

[0060] The embodiment of the present invention establishes a power management system based on an existing IC on the SOC, and further reduces power consumption by setting a power supply priority, and is suitable for power supply limitation of micro energy collection, and realizes power management of micro-ampere power consumption. Increase the scope of energy harvesting, break through the environmental limitations of energy harvesting, and expand the application of clean energy.

3 shows the structure of a power management apparatus based on micro energy harvesting provided by an embodiment of the present invention. For the convenience of description, only parts related to the present invention are shown.

[0062] As an embodiment of the present invention, the power management device based on micro energy harvesting is established on the SOC, including

[0063] The collecting unit 11 is configured to select an acquisition mode according to a current power source and a current power collection mode, where the acquisition mode includes at least a low power consumption mode and a high efficiency acquisition mode.

In the embodiment of the present invention, the SOC may be established on the MCU to collect weak electric energy. Since the collected electric quantity is relatively weak, the corresponding acquisition mode needs to be started to perform micro energy collection. For example, if the current collected power is relatively low, and the current power supply is not sufficient, the low-power acquisition mode with lower power consumption is used for acquisition, and in the current collected power, the high-efficiency acquisition with higher acquisition efficiency can be selected. The way to accumulate power faster.

[0065] The low-power acquisition mode works in an MCU sleep mode, and sets the wake-up frequency by controlling the number and width of the acquired boost pulses;

[0066] The high-efficiency acquisition mode can be controlled by MPPT control, and the optimal parameter and the optimal power balance voltage point are selected by the MPPT, and the weak electric energy is collected according to the optimal parameter and the optimal power balance voltage point. [0067] a threshold setting unit 12, configured to set a communication threshold and a load threshold, where the communication threshold is less than a load threshold;

[0068] The first determining unit 13 is configured to determine, according to the inter-turn stamp, whether the current power source is greater than a communication threshold, and determine whether the current power source is greater than a load threshold;

[0069] The communication unit 14 is configured to communicate with the server when the current power source is greater than the communication threshold.

[0070] In the embodiment of the present invention, the current power supply amount may be determined according to the inter-turn stamp, or the current power supply amount may be determined by the preset frequency, and the current power meets the communication condition, communicates with the server, and performs data interaction. The data interaction includes uploading the collected data to the server, identifying an update instruction on the server, sending an update request to the server, and downloading the update data from the server to reconfigure the acquisition criteria based on the acquired update data.

[0071] The power supply unit 15 is configured to supply power to the load when the current power source is greater than the load threshold.

[0072] In the embodiment of the present invention, the power supply priorities are: acquisition, communication, and load power supply. After the current power can bear the power consumption of the acquisition task, the communication power is supplied, and the power output of the communication is satisfied only after the current power can satisfy the power consumption requirement of the communication. After the current power is insufficient to meet the power consumption requirements of the current communication, the communication can be delayed by extending the inter-frame stamp, or the frequency of communication can be reduced.

[0073] The embodiment of the present invention establishes a power management system based on an existing IC on the SOC, and further reduces power consumption by setting a power supply priority, and is applicable to power supply limitation of micro energy collection, thereby realizing power management of micro-ampere power consumption. Increase the scope of energy harvesting, break through the environmental limitations of energy harvesting, and expand the application of clean energy.

4 shows the structure of a power management apparatus based on micro energy harvesting provided by a preferred embodiment of the present invention, and for convenience of explanation, only parts related to the present invention are shown.

As an embodiment of the present invention, the collecting unit 11 includes a detecting unit 111 for determining the current power source by detecting the current power source voltage, and determining the current power collected by detecting the input current, the input voltage, or the input charge.

[0076] For example, the current acquisition mode may be determined according to the voltage in the current electrical energy storage unit. If the current power is low, the detection frequency may be lowered, that is, the acquisition mode is not frequently changed, thereby reducing power consumption;

[0077] If the current power is high, the detection frequency can be increased, that is, the acquisition mode more suitable for the current environment is continuously replaced, thereby increasing the collection efficiency.

[0078] As a preferred embodiment of the present invention, the collecting unit 11 may further include: [0079] The second determining unit 112 is configured to determine whether the currently collected power is greater than the first collection threshold, and determine whether the current power is greater than the second collection threshold;

[0080] The acquisition mode selection unit 113 is configured to select a high-efficiency acquisition mode when the current collected power is greater than the first collection threshold or the current power is greater than the second collection threshold, and the current collection power is not greater than the first collection threshold or the current power is greater than The second acquisition threshold 吋 selects the low power acquisition mode.

[0081] The first collection threshold and the second collection threshold may be set according to actual requirements, for example, the first acquisition threshold is set to acquire a current value or a voltage value corresponding to the conversion of 50 mA, and the second collection threshold is set to The power supply voltage value or current value corresponding to 20% of the battery power.

In the embodiment of the present invention, the current collected power is preferentially determined. If the current collection capability is weak, but the battery still stores more power, the high-efficiency collection may still be used, if the current battery stores the power. Not too much, converted to low power acquisition.

[0083] The collecting unit 11 may further include:

[0084] The third determining unit 114 is configured to determine whether the current power source is within the preset interval or the plurality of time intervals continuously exceed the second collection threshold;

[0085] The acquisition mode selection unit enters the sleep state after the current power supply is within the preset interval or the plurality of inter-day intervals continuously exceeds the second collection threshold, and only retains the low-power acquisition mode; If the preset interval or multiple inter-day intervals do not continue to exceed the second acquisition threshold, switch to the awake state.

, choose the high efficiency acquisition mode.

In the embodiment of the present invention, when the current power is at an unstable threshold (the second collection threshold), if the frequency is frequently switched, the power consumption will be consumed, so that the device can temporarily enter the sleep state. Keep the low-power acquisition mode to continue the micro-energy acquisition until the power supply has increased greatly, no longer float near the critical value, and then wake up the system to enter the high-efficiency acquisition mode. Because of the large amount of power, it can be switched to Collect more efficient mode acquisition.

[0087] As a preferred embodiment of the present invention, the power management device based on the micro energy collection may further include: [0088] The fourth determining unit 16 is configured to communicate with the server, and determine whether the current power source is lower than a preset. The lower communication threshold, the lower communication threshold is lower than the communication threshold;

[0089] The communication unit 14 interrupts the communication when the current power source is lower than the preset lower communication threshold, and records the breakpoint data for communication again, and continues data transmission according to the breakpoint data; Below the preset lower communication threshold threshold, communication is maintained.

[0090] In the embodiment of the present invention, if the communication power supply suddenly drops below the preset value and the current communication demand cannot be guaranteed, the communication is interrupted, and the power-off data is saved, and the power is restored to the preset value. , continue to complete the data interaction based on the breakpoint data.

It should be understood that the first determining unit 13, the second determining unit 112, the third determining unit 114, and the fourth determining unit 16 are only divided as modules, and may be multiplexed in a determining processing module in practice.

Another object of an embodiment of the present invention is to provide a micro energy supply device including the above micro energy harvesting device.

[0093] The embodiment of the present invention establishes a power management system based on an existing IC on the SOC, and further reduces power consumption by setting a power supply priority, and is applicable to power supply limitation of micro energy collection, thereby realizing power management of micro-ampere power consumption. Increase the scope of energy harvesting, break through the environmental limitations of energy harvesting, and expand the application of clean energy.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention are included in the present invention. Within the scope of protection.

Claims

Claim

[Claim 1] A power management method based on micro energy harvesting, characterized in that

The SOC is executed on the MCU, and the method includes the following steps: selecting an acquisition mode to perform micro energy collection according to a current power supply quantity and a current collection power quantity, where the acquisition mode includes at least a low power consumption acquisition mode and a high efficiency acquisition mode;

Set communication threshold and load threshold;

According to the time stamp, it is determined whether the current power source is greater than the communication threshold, and the current power source is greater than the communication threshold, and communicates with the server;

Determine whether the current power supply is greater than the load threshold, and supply power to the load when the current power is greater than the load threshold.

[Claim 2] The method according to claim 1, wherein the current power source is determined by detecting a current power source, and the current power collected is determined by detecting an input current, an input voltage, or an input charge.

[Claim 3] The method according to claim 1, wherein the step of performing micro energy collection according to the current power source and the current collected power selection acquisition mode is specifically:

Determining whether the currently collected power is greater than the first collection threshold;

If yes, select the high efficiency acquisition mode;

If not, it is determined whether the current power is greater than the second collection threshold; if yes, the high efficiency acquisition mode is selected;

If not, select the low power acquisition mode.

[Claim 4] The method according to claim 3, wherein the step of determining whether the current power is greater than the second collection threshold further comprises:

Determining whether the current power source is continuously within the preset interval or the plurality of time intervals exceeds the second collection threshold;

If not, enter the sleep state, leaving only the low power acquisition mode; if yes, switch to the awake state and select the high efficiency acquisition mode.

[Claim 5] The method according to claim 1, wherein, after communicating with the server, determining whether the current power source is lower than a preset lower communication threshold, the lower communication threshold is lower than The communication threshold;

If so, the communication is interrupted, and the breakpoint data is recorded for communication again, and the data transfer is continued according to the breakpoint data;

If not, keep the communication.

[Claim 6] A power management apparatus based on micro energy harvesting, wherein the apparatus is established

On the SOC, the device includes:

An acquisition unit, configured to select an acquisition mode according to a current power supply quantity and a current collection power quantity, where the acquisition mode includes at least a low power consumption acquisition mode and a high efficiency acquisition mode;

a threshold setting unit, configured to set a communication threshold and a load threshold; a first determining unit, configured to determine, according to the inter-turn stamp, whether the current power source is greater than a communication threshold, and determine whether the current power source is greater than a load threshold;

The communication unit is configured to communicate with the server when the current power source is greater than the communication threshold. The power supply unit is configured to supply power to the load when the current power supply is greater than the load threshold.

[Claim 7] The device according to claim 6, wherein the collecting unit includes a detecting unit for determining a current power source by detecting a current power source voltage, by detecting an input current, an input voltage, or an input charge. Determine the current collected power.

[Claim 8] The device according to claim 6, wherein the collecting unit comprises:

The second determining unit is configured to determine whether the currently collected power is greater than the first collection threshold, and determine whether the current power is greater than the second collection threshold;

The acquisition mode selection unit is configured to select a high-efficiency acquisition mode when the current collected power is greater than the first collection threshold or the current power is greater than the second collection threshold; the current collection power is not greater than the first collection threshold or the current power is greater than the second collection threshold吋, select the low power acquisition mode.

[Claim 9] The device according to claim 8, wherein the collecting unit further comprises:

a third determining unit, configured to determine whether the current power source is within a preset interval or a plurality of time intervals continuously exceeds the second collection threshold;

The acquisition mode selection unit is in the preset power interval or between the plurality of time zones After the interval continues to exceed the second collection threshold, the sleep state is entered, and only the low-power acquisition mode is retained; the current power supply is within the preset interval or the plurality of inter-day intervals does not continue to exceed the second collection. Threshold 吋, switch to awake state, select high efficiency acquisition mode.

[Claim 10] The device according to claim 6, wherein the device further comprises:

a fourth determining unit, configured to communicate with the server, determine whether the current power source is lower than a preset lower communication threshold, the lower communication threshold is lower than the communication threshold; and the communication unit is lower than the current power supply Set the communication lower threshold 吋, interrupt communication, and record the breakpoint data for communication again, continue data transmission according to the breakpoint data; keep communication when the current power supply is not lower than the preset lower communication threshold.

[Claim 11] A micro energy power supply, characterized in that the micro energy power supply comprises the claims