WO2024000870A1

WO2024000870A1 - Ultramicro energy conversion circuit and energy storage device

Info

Publication number: WO2024000870A1
Application number: PCT/CN2022/121894
Authority: WO
Inventors: 谢炜; 许天骥; 黄小军
Original assignee: 箭牌家居集团股份有限公司; 深圳箭牌智能家居有限公司
Priority date: 2022-06-29
Filing date: 2022-09-27
Publication date: 2024-01-04
Also published as: CN115528789A

Abstract

The present application relates to an ultramicro energy conversion circuit and an energy storage device. The ultramicro energy conversion circuit comprises: a control module, a switch module, and a plurality of energy storage units, wherein the switch module is respectively connected to the control module, an ultramicro energy source, and the plurality of energy storage units; the control module is used for controlling the switch module to be in a first switch-on state, so that the plurality of energy storage units are connected in parallel to collect and store a charging voltage provided by the ultramicro energy source, and is also used for controlling the switch module to be in a second switch-on state, so that the plurality of energy storage units are connected in series to provide a discharge voltage for a load, the discharge voltage being greater than the charging voltage. Switching of the switch-on states of the switch module is controlled by the control module, and the low-voltage ultramicro energy appearing frequently is stored and applied in high voltage mode, thereby greatly improving the energy collection efficiency and expanding the application scene.

Description

Ultra-micro energy conversion circuit and energy storage device

Technical field

The present application relates to the field of energy harvesting technology, and in particular to an ultra-micro energy conversion circuit and energy storage device.

Background technique

Many micro-energy harvesting solutions currently on the market are based on the conversion between kinetic energy and electrical energy. The energy collected and stored is used by the load in the form of voltage. Usually the working voltage of the load is above 3V and must be maintained at 5V or above. The input voltage can make the load work stably, and the voltage collected generally needs to be higher than 5V for storage.

However, in daily life, scenes with voltages higher than 5V are limited, and the scenes with voltages higher than 5V last for a short time, and the energy collected is very limited. Although there are a large number of ultra-micro voltage scenarios, the voltage amplitude of ultra-micro voltage scenarios is usually around 1-3V. Due to the low voltage, it is difficult to store, and the low voltage after storage cannot quickly meet the load startup requirements, so usually this part of the ultra-micro voltage scene is Even the smallest amount of energy has not been used effectively.

Contents of the invention

Based on this, it is necessary to address the above technical problems and provide an ultra-micro energy conversion circuit and energy storage device that can effectively collect and utilize ultra-micro energy.

An ultra-micro energy conversion circuit, including: a control module, a switch module and a plurality of energy storage units, wherein the switch module is respectively connected to the control module, an ultra-micro energy source and a plurality of energy storage units;

The control module is used to control the switch module to be in the first conduction state, so that multiple energy storage units are connected in parallel to collect and store the charging voltage provided by the ultra-micro energy source, and is also used to control all the energy storage units. The switch module is in a second conductive state, so that a plurality of the energy storage units are connected in series to provide a discharge voltage for the load, wherein the discharge voltage is greater than the charging voltage; the switch module includes: a plurality of first switches unit, a plurality of second switch units and at least one third switch unit, the input end of the energy storage unit is connected to the ultra-micro energy source through a first switch unit; the output end of the energy storage unit is connected through A second switch unit is connected to the ultra-micro energy source; a third switch unit is connected between two energy storage units; wherein the first conduction state of the switch module includes: The first switch unit and each of the second switch units are both in a conductive state, and each of the third switch units are in a disconnected state; the second conductive state of the switch module includes: each of the first switches The unit and each of the second switch units are in an off state, and each of the third switch units are in an on state; the storage unit includes a capacitor, and the upper plate of the capacitor serves as the first electrode of the storage unit. terminals are respectively connected to one end of the first switch unit and one end of the third switch unit, the other end of the first switch unit is connected to the positive electrode of the ultra-micro energy source, and the other end of the third switch unit is connected to The lower plate of the capacitor is connected; the lower plate of the capacitor serves as the second end of the storage unit and is connected to one end of the second switch unit, and the other end of the second switch unit is connected to the ultra-fine energy Negative connection of the source.

In one of the embodiments, the control module further includes a processor, and the processor is configured to control the switch module to switch to the first conductive state when the time of the switch module reaches a first preset time. The second conduction state is described.

In one embodiment, the control module further includes a processor, which is connected to each energy storage unit and is used to control when the voltage value at both ends of each energy storage unit is greater than the first preset value. The switch module switches to the second conductive state.

In one embodiment, the processor is connected to the output end of the energy storage unit link, and is used to detect the discharge voltage of the ultra-micro energy conversion circuit when the energy storage units are connected in series, and detect the discharge voltage of the ultra-fine energy conversion circuit when the energy storage units are connected in series. When the discharge voltage is lower than the second preset value, the switch module is controlled to switch to the first conduction state.

In one embodiment, the processor is further configured to control the switch module to switch to the first conductive state when the time the switch module is in the second conductive state reaches a second preset time.

In one of the embodiments, a switching power supply is further included. The switching power supply is connected to the output end of the energy storage unit link. The switching power supply is used to boost or step down the output voltage of the energy storage unit link. Convert.

In one embodiment, an energy storage device includes at least one ultra-micro energy conversion circuit as described above.

In one embodiment, each of the ultra-fine energy conversion circuits is respectively connected to the ultra-fine energy source, and each of the ultra-fine energy conversion circuits collects and converts the charging voltage provided by the ultra-fine energy source in a time-sharing manner. to output the discharge voltage.

In the above-mentioned ultra-micro energy conversion circuit, the control module controls the first conduction state and the second conduction state of the switch module to connect the energy storage units in parallel or in series. When the energy storage units are connected in parallel, the ultra-micro energy source can When each energy storage unit is charged, the charging efficiency is high; when the energy storage units are connected in series, each energy storage unit is combined into an overall energy storage structure, and the output voltage of the overall energy storage structure is the sum of the output voltages of each energy storage unit. and, thus driving the corresponding load work and realizing the storage and utilization of ultra-micro energy. The ultra-micro energy conversion circuit of this application controls the conduction state switching of the switch module through the control module, stores the low-voltage ultra-micro energy that often appears at high frequency, and applies it in the form of high voltage, thus greatly improving energy collection. efficiency and application scenarios.

Description of drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the traditional technology, the drawings needed to be used in the description of the embodiments or the traditional technology will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of explaining the embodiments or the technical solutions of the traditional technology. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a structural block diagram of an ultra-micro energy conversion circuit in one embodiment;

Figure 2 is a schematic diagram of an ultra-micro energy conversion circuit when the switch module is in the first conductive state in one embodiment;

Figure 3 is a schematic diagram of an ultra-micro energy conversion circuit when the switch module is in the second conduction state in one embodiment;

Figure 4 is a structural block diagram of an energy storage device in another embodiment.

Explanation of reference symbols:

11-Control module, 12-Switch module, 13-Ultra-micro energy source, 14-Energy storage unit.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing specific embodiments only and is not intended to limit the application.

It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.

Spatial relational terms such as "under", "under", "under", "under", "on", "above", etc., in This may be used to describe the relationship of one element or feature to other elements or features shown in the figures. It will be understood that the spatially relative terms encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "under" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "below" and "under" may include both upper and lower orientations. Additionally, the device may be otherwise oriented (eg, rotated 90 degrees or at other orientations) and the spatial descriptors used herein interpreted accordingly.

It should be noted that when an element is said to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intervening element. In addition, "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

As used herein, the singular forms "a," "an," and "the" may include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" or "having" and the like specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, but do not exclude the presence or addition of one or more Possibility of other features, integers, steps, operations, components, parts or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

Just like the background technology, in daily life, the scenes with voltages higher than 5V are limited, and the scenes with voltages higher than 5V last for a short time, and the energy collected is very limited. Although there are a large number of ultra-micro voltage scenarios, the voltage amplitude of ultra-micro voltage scenarios is usually around 1-3V. Due to the low voltage, it is difficult to store, and the low voltage after storage cannot quickly meet the load startup requirements, so usually this part of the ultra-micro voltage scene is Even the smallest amount of energy has not been used effectively.

Based on the above reasons, the present invention provides an ultra-micro energy conversion circuit.

In one embodiment, as shown in Figure 1, an ultra-micro energy conversion circuit of ultra-micro energy is provided, including: a control module 11, a switch module 12 and a plurality of energy storage units 14, wherein the switch module 12 is respectively connected with The control module 11, the ultra-micro energy source 13, and multiple energy storage units 14 are connected; the control module 11 is used to control the switch module 12 to be in the first conduction state, so that the multiple energy storage units 14 are connected in parallel to collect and store ultra-micro energy. The charging voltage provided by the energy source 13 is also used to control the switch module 12 to be in the second conductive state, so that multiple energy storage units 14 are connected in series to provide a discharge voltage to the load, where the discharge voltage is greater than the charging voltage.

The energy storage unit 14 may include a capacitor. When the ultra-micro energy source 13 applies voltage to the capacitor, the capacitor will store charges to realize energy storage. It can be understood that ultra-fine energy can be collected through capacitors and stored. The control module 11 can be an electronic control module or a structural control module. The control module can be adjusted manually to control the conduction state of the switch module 12. For example, each switch in the switch module 12 can be pressed directly by hand. conduction state. When the control module 11 is an electronic control module, the conductive state of the switch module 12 can be switched by setting a preset trigger condition.

Specifically, when the switch module 12 is in the first conductive state, each energy storage unit 14 is connected in parallel, the ultra-micro energy source 13 is electrically connected to each energy storage unit 14, each energy storage unit 14 is connected in parallel, and both ends of each energy storage unit 14 The applied voltage is the output voltage of the ultra-micro energy source 13. At this time, each energy storage unit 14 will store charges, that is, charge. When the switch module 12 is in the second conduction state, the ultra-micro energy source 13 is no longer connected to each energy storage unit 14, and each energy storage unit 14 is connected in series. When each energy storage unit 14 is used as an integral energy storage structure, The voltage at both ends of the energy storage structure is the sum of the voltages at both ends of each energy storage unit 14, so the voltage boost is completed without passing through a voltage converter. At this time, the output voltage of the ultra-fine energy conversion circuit is enough to start the load and drive the load to work. Thus the utilization of ultra-micro energy is completed.

For example, the output voltage of the ultra-micro energy source 13 is 2V, and the ultra-micro energy conversion circuit includes three energy storage units 14. After the ultra-micro energy source 13 completes charging each energy storage unit 14, each energy storage unit 14 If the voltage at both ends is 2V, then after each energy storage unit 14 is connected in series, the output voltage of the ultra-micro energy conversion circuit is 6V, which is greater than the working voltage of the load (5V) and is enough to drive the corresponding load.

In the application, the number of energy storage units 14 can be determined according to the working voltage of the load and the output voltage of the ultra-micro energy source 13, so that after the ultra-micro energy source 13 completes charging of each energy storage unit 14, each energy storage unit 14 is connected in series. The total voltage can be greater than or equal to the working voltage of the load.

In this embodiment, the control module 11 controls the first conduction state and the second conduction state of the switch module 12 to connect the energy storage units 14 in parallel or in series. When the energy storage units 14 are connected in parallel, the ultra-micro energy source 13 It can charge each energy storage unit 14 with high charging efficiency; when the energy storage units 14 are connected in series, each energy storage unit 14 is combined into an overall energy storage structure, and the output voltage of the overall energy storage structure is The sum of the output voltages of the unit 14 can drive the corresponding load to realize the storage and utilization of ultra-micro energy. The ultra-micro energy conversion circuit of the present application controls the conduction state switching of the switch module 12 through the control module 11, stores the low-voltage ultra-micro energy that often appears at high frequency, and applies it in the form of high voltage, thus greatly improving the energy efficiency. Energy harvesting efficiency and application scenarios.

In one embodiment, as shown in Figures 2 and 3, the switch module includes: a plurality of first switch units S1, a plurality of second switch units S2, and at least one third switch unit S3. The input end of the energy storage unit is A first switch unit S1 is connected to the ultra-micro energy source 13; the output end of the energy storage unit passes between a second switch unit S2 and the ultra-micro energy source 13; a third switch unit S3 is connected between the two energy storage units. ; Wherein, the first conduction state of the switch module includes: each first switch unit S1 and each second switch unit S2 are in a conduction state, and each third switch unit S3 is in an off state; the second switch module 12 The conduction state includes: each first switch unit S1 and each second switch unit S2 are in an off state, and each third switch unit S3 is in a conduction state.

When the control module 11 controls the switching module 12 to be turned on and off, each first switch unit S1 and each second switch unit S2 should be turned on and off synchronously, and each third switch unit S3 should be turned on or off synchronously. Therefore, during the charging process of each energy storage unit 14, each energy storage unit 14 is synchronously connected and disconnected from the ultra-fine energy source 13, realizing synchronous charging of each energy storage unit 14 and ensuring that each energy storage unit 14 stores energy. The energy is as similar as possible. By synchronously turning on or off each third switch unit S3, each energy storage unit 14 is synchronously discharged, ensuring that the output voltage of the ultra-fine energy conversion circuit is the sum of the output voltages of each energy storage unit 14 to drive the corresponding load. .

Specifically, when each first switch unit S1 and each second switch unit S2 are in the on state, each energy storage unit 14 is connected to the ultra-micro energy source 13 respectively, and when each second switch unit S2 is in the off state, Each energy storage unit 14 is connected in parallel, and the ultra-micro energy source 13 charges each energy storage unit 14; when each first switch unit S1 and each second switch unit S2 are in a disconnected state, and each third switch unit S3 is in a conductive state. , each energy storage unit 14 has no connection relationship with the ultra-micro energy source 13, and each energy storage unit 14 is connected in series and serves as a discharge power source.

In this embodiment, when each first switch unit S1 and each second switch unit S2 are in the on state and each second switch unit S2 is in the off state, each energy storage unit 14 is connected in parallel, and the ultra-micro energy source 13 is connected with each The energy storage units 14 are electrically connected, and each energy storage unit 14 is connected in parallel. The voltage applied to both ends of each energy storage unit 14 is the output voltage of the ultra-micro energy source 13. At this time, each energy storage unit 14 will store electric charge, that is, charge. When each first switch unit S1 and each second switch unit S2 are in the off state, and each third switch unit S3 is in the on state, the ultra-micro energy source 13 is no longer connected to each energy storage unit 14, and each energy storage unit 14 in series, when each energy storage unit 14 is regarded as an integral energy storage structure, the voltage at both ends of the energy storage structure is the sum of the voltages at both ends of each energy storage unit 14, and the voltage boost is completed without a voltage converter. , at this time, the output voltage of the ultra-micro energy conversion circuit is enough to start the load and drive the load to work, thereby completing the utilization of ultra-micro energy.

In one embodiment, as shown in Figures 2 and 3, the memory unit includes a capacitor C. The upper plate of the capacitor C serves as the first end of the memory unit, which is connected to one end of the first switching unit S1 and one end of the third switching unit S3 respectively. connection, the other end of the first switch unit S1 is connected to the positive electrode of the ultra-micro energy source 13, the other end of the third switch unit S3 is connected to the lower plate of the capacitor C; the lower plate of the capacitor C serves as the second end of the storage unit, One end of the second switch unit S2 is connected, and the other end of the second switch unit S2 is connected to the negative electrode of the ultra-micro energy source 13 .

Among them, capacitor C is a "container" that stores charge. The capacitance of capacitor C is numerically equal to the ratio of the amount of charge on a conductive plate to the voltage between the two plates. Therefore, the capacitance of capacitor C It needs to match the output voltage of the ultra-micro energy source 13 to ensure that the voltage between the two plates of the charging container C is as close as possible to the output voltage of the ultra-micro energy source 13 .

Specifically, the upper plate of the capacitor C is connected to the positive electrode of the ultra-micro energy source 13 through the first switch unit S1, and the lower plate of the capacitor C is connected to the negative electrode of the ultra-micro energy source 13 through the second switch unit S2, then each third When one switch unit S1 and each second switch unit S2 are in the on state, and the third switch unit S3 is in the off state, each capacitor C is connected in parallel, and the output voltage of the ultra-micro energy source 13 exerts pressure on each ultra-micro energy source 13 output voltage across the capacitor C. The third switch unit S3 is located between the two capacitors C. When the third switch unit S3 is in the conducting state, the upper plate of the capacitor C is connected to the lower plate of the other capacitor C, thereby realizing the connection between the capacitor C and the other capacitor C. C is connected in series; then each first switch unit S1 and each second switch unit S2 are in the off state, and each third switch unit S3 is in the on state, each capacitor C is connected in series, and each capacitor C in series forms a capacitor C When the link is discharging, the upper plate of the capacitor C at the beginning of the link and the lower plate of the capacitor C at the end serve as different output poles of the power supply. The voltage between the two output poles is the voltage between the two plates of each capacitor C. Sum.

In this embodiment, through the above connection method, when the first switch unit S1 and the second switch unit S2 are in the on state and the third switch unit S3 is in the off state, the positive electrode of the ultra-fine energy source 13 is connected to the capacitor C. The upper plate of the capacitor C is connected, and the negative electrode of the ultrafine energy source 13 is connected to the lower plate of the capacitor C. Then, a voltage is applied to each capacitor C through the ultrafine energy source 13, thereby charging each capacitor C. After the charging is completed, each first switch unit S1 and each second switch unit S2 are in the off state, and each third switch unit S3 is in the on state, thereby realizing the series connection of the capacitors C. The capacitors C after the series connection form A capacitor C link. When discharging, the upper plate of the capacitor C at the beginning of the capacitor C link and the lower plate of the capacitor C at the end serve as different output poles of the power supply. The voltage between the two output poles is the two pole plates of each capacitor C. The sum of the voltages between them increases the output voltage and supplies power to the corresponding load.

In one embodiment, the control module 11 further includes a processor, and the processor is configured to control the switch module 12 to switch to the second conductive state when the time the switch module 12 is in the first conductive state reaches the first preset time.

Among them, the processor can be a single-chip microcomputer. When each first switch unit S1 and each second switch unit S2 are turned on and off synchronously, the processor only needs to select a first switch unit S1 or a second switch unit S2 to monitor the conduction time. When the conduction time reaches the first preset time, the switch module 12 is controlled to switch to the second conduction state, that is, each first switch unit S1 and each second switch unit S2 are disconnected, and each third switch unit S3 is conducted.

It can be understood that if the output voltage of the ultra-micro energy source 13 is matched and the storage energy of the energy storage unit 14 is low, then after the charging time reaches a certain period, it can basically be determined that the charging of each energy storage unit 14 is completed. After charging is completed, the control switch module 12 switches to the second conduction state, thereby disconnecting the ultra-micro energy conversion circuit from the ultra-micro energy source 13 and preparing the ultra-micro energy conversion circuit for discharge at any time. load power supply.

In this embodiment, the processor monitors whether the time that each first switch unit S1 and each second switch unit S2 is in the conductive state reaches the first preset time to determine whether each energy storage unit 14 is fully charged. When the time that the module 12 is in the first conduction state reaches the first preset time, the processor determines that each energy storage unit 14 is fully charged, and switches the switch module 12 to the second conduction state by controlling the switch module 12 to turn off the ultra-micro energy conversion circuit. Open the connection with the ultra-micro energy source 13 and prepare the ultra-micro energy conversion circuit for discharge so as to supply power to the load at any time.

In another embodiment, the control module 11 also includes a processor, which is connected to each energy storage unit 14 and is used to control the switch module 12 when the voltage value at both ends of each energy storage unit 14 is greater than the first preset value. Switch to the second conduction state.

It can be understood that the voltage output by the ultra-micro energy conversion circuit during discharge is the sum of the voltages across each energy storage unit 14. When the output voltage of the ultra-micro energy conversion circuit needs to be greater than a certain value, the voltage across each energy storage unit 14 is also Needs to be greater than a certain value. Therefore, it can be determined whether each energy storage unit 14 is fully charged by monitoring the voltage at both ends of each energy storage unit 14 to be greater than the first preset value. When the voltage at both ends of each energy storage unit 14 is greater than the first preset value, When it is determined that each energy storage unit 14 is fully charged, the charging process can be stopped and ready for discharge, even if each first switch unit S1 and each second switch unit S2 are disconnected and each third switch unit S3 is switched on.

In this embodiment, the processor monitors whether the voltage at both ends of each energy storage unit 14 is greater than the first preset value to determine whether each energy storage unit 14 is fully charged. The voltage at both ends of each energy storage unit 14 is greater than the first preset value. When setting the value, it is determined that each energy storage unit 14 is fully charged, and the switch module 12 is switched to the second conduction state, so that the ultra-fine energy conversion circuit is disconnected from the ultra-fine energy source 13 and the ultra-fine energy conversion circuit is Be prepared to discharge so that the load can be powered at any time.

In one embodiment, the processor is connected to the output end of the energy storage unit link, and is used to detect the discharge voltage of the ultra-micro energy conversion circuit when each energy storage unit 14 is connected in series, and when the discharge voltage is lower than the second preset value, the control switch module 12 is switched to the first conductive state.

It can be understood that when the discharge time of the ultra-fine energy conversion circuit reaches a certain value, the output voltage of each energy storage unit 14 will decrease. At this time, the output voltage of the ultra-fine energy conversion circuit is likely to be unable to continue to drive the load, and it is necessary to adjust the output voltage of each energy storage unit 14. The energy storage unit 14 is charged. Therefore, the switch module 12 is controlled to switch to the first conduction state, that is, each first switch unit S1 and each second switch unit S2 are turned on, and each third switch unit S3 is turned off, so that the ultra-fine energy conversion circuit stops discharging and restarts. Each energy storage unit 14 is charged.

In this embodiment, the processor detects the discharge voltage of the ultra-micro energy conversion circuit, and when the discharge voltage is lower than the second preset value, the switch module 12 is controlled to switch to the first conduction state, so that the ultra-micro energy conversion circuit When the output voltage is too low, the ultra-fine energy conversion circuit automatically stops discharging and recharges each energy storage unit 14.

In one embodiment, the processor is further configured to control the switch module 12 to switch to the first conductive state when the time the switch module 12 is in the second conductive state reaches the second preset time.

Similarly, it can be understood that when the discharge time of the ultra-micro energy conversion circuit reaches a certain value, the output voltage of each energy storage unit 14 will decrease. At this time, the output voltage of the ultra-micro energy conversion circuit may not be able to continue to drive the load. Each energy storage unit 14 needs to be charged. Therefore, each first switch unit S1 and each second switch unit S2 are controlled to be turned on, and each third switch unit S3 is turned off, so that the ultra-fine energy conversion circuit stops discharging and recharges each energy storage unit 14.

In this embodiment, the processor detects the discharge time of the ultra-micro energy conversion circuit, and when the discharge voltage reaches the second preset time, it is determined that the output voltage of the ultra-micro energy conversion circuit cannot drive the load. At this time, each energy storage unit 14 needs to be recharged. Thereby, the switch module 12 is controlled to switch to the first conduction state, so that the ultra-fine energy conversion circuit automatically stops discharging and recharges each energy storage unit 14 .

In one embodiment, a switching power supply is also included, the switching power supply is connected to the output end of the energy storage unit link, and the switching power supply is used to step up or step down the output voltage of the energy storage unit link.

Among them, the switching power supply is a high-frequency power conversion device. It mainly uses power electronic switching devices to periodically "turn on" and "off" the electronic switching devices through the control circuit, allowing the power electronic switching devices to The voltage is pulse modulated to realize voltage conversion, adjustable output voltage and automatic voltage stabilization.

It is understandable that for some loads, the output voltage of the ultra-fine energy conversion circuit may not be its optimal operating voltage, and the output voltage of the ultra-fine energy conversion circuit is difficult to fine-tune. After the switching power supply is connected to the output end of the energy storage unit link, the switching power supply converts the output voltage of the ultra-micro energy conversion circuit and outputs a suitable voltage as the driving voltage of the load, which can make the load work in a better state. In addition, the output voltage of the ultra-micro energy conversion circuit will gradually decrease as time increases. Stabilizing the voltage through a switching power supply is also conducive to the stable operation of the load.

In this embodiment, the switching power supply converts the output voltage of the ultra-fine energy conversion circuit, thereby outputting a suitable voltage as the driving voltage of the load, so that the load can work in a better state. In addition, the switching power supply is used to stabilize the voltage to ensure stable operation of the load.

In one embodiment, an energy storage device includes at least one ultra-micro energy conversion circuit as above.

The advantages of the energy storage device of this embodiment over the prior art are the same as the advantages of the above-mentioned ultra-micro energy conversion circuit over the prior art, and will not be described again here.

In one embodiment, as shown in Figure 4, the energy storage device includes multiple ultra-micro energy conversion circuits, each ultra-micro energy conversion circuit is connected to the ultra-micro energy source 13, and each ultra-micro energy conversion circuit time-shares the ultra-micro energy conversion circuit. The charging voltage provided by the energy source 13 is collected and converted to output a discharge voltage.

Among them, each ultra-micro energy conversion circuit can be connected to the ultra-micro energy source 13 one by one through the electronically controlled switch S4 unit, and the ultra-micro energy conversion circuit connected to the ultra-micro energy source 13 is controlled by the electronically controlled switch S4 unit that controls conduction. Then control the charging of that ultra-fine energy conversion circuit. Among them, the conduction sequence and conduction time of each electronically controlled switch S4 unit can be set in advance.

It can be understood that each ultra-micro energy conversion circuit is connected to the load respectively, and each ultra-micro energy conversion circuit supplies power to the load in a time-sharing manner. Similarly, each ultra-micro energy conversion circuit can be connected to the ultra-micro energy source 13 one by one through the electronically controlled switch S4 unit, and the electronically controlled switch S4 unit that controls conduction controls which ultra-micro energy conversion circuit charges the load. Among them, the conduction sequence and conduction time of each electronically controlled switch S4 unit can also be set in advance. The ultra-micro energy conversion circuit cannot be connected to the ultra-micro energy source 13 and the load at the same time to prevent the same ultra-micro energy conversion circuit from charging and discharging at the same time.

In this embodiment, each ultrafine energy conversion circuit is connected to the ultrafine energy source 13 respectively, so that after one ultrafine energy conversion circuit is charged, another ultrafine energy conversion circuit is used to connect to the ultrafine energy source 13, so that The ultra-micro energy source 13 charges another ultra-micro energy conversion circuit, thereby continuously collecting ultra-micro energy and improving the utilization efficiency of ultra-micro energy.

In the description of this specification, reference to the terms "some embodiments," "other embodiments," "ideal embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included herein. In at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

An ultra-micro energy conversion circuit, characterized in that it includes: a control module, a switch module and a plurality of energy storage units, wherein the switch module is connected to the control module, an ultra-micro energy source, and a plurality of energy storage units respectively. unit connection;

The control module is used to control the switch module to be in the first conduction state, so that multiple energy storage units are connected in parallel to collect and store the charging voltage provided by the ultra-micro energy source, and is also used to control all the energy storage units. The switch module is in a second conductive state, so that a plurality of the energy storage units are connected in series to provide a discharge voltage to the load, wherein the discharge voltage is greater than the charging voltage;

The switch module includes: a plurality of first switch units, a plurality of second switch units and at least one third switch unit. The first end of the energy storage unit is connected to the ultra-fine energy through one of the first switch units. Source connection; the second end of the energy storage unit is connected to the ultra-micro energy source through a second switch unit; a third switch unit is connected between the two energy storage units;

Wherein, the first conduction state of the switch module includes: each of the first switch units and each of the second switch units are in a conduction state, and each of the third switch units are in an off state; The second conduction state of the switch module includes: each of the first switch units and each of the second switch units are in an off state, and each of the third switch units are in a conduction state;

The storage unit includes a capacitor, and the upper plate of the capacitor serves as the first end of the storage unit and is respectively connected to one end of the first switch unit and one end of the third switch unit. The other end is connected to the positive electrode of the ultra-micro energy source, and the other end of the third switch unit is connected to the lower plate of the capacitor; the lower plate of the capacitor serves as the second end of the storage unit, and One end of the second switch unit is connected, and the other end of the second switch unit is connected to the negative electrode of the ultra-micro energy source.
The ultra-micro energy conversion circuit according to claim 1, wherein the control module further includes a processor, and the processor is configured to reach a first preset time when the switch module is in the first conduction state. when, the switch module is controlled to switch to the second conduction state.
The ultra-micro energy conversion circuit according to claim 1, characterized in that the control module further includes a processor, the processor is connected to each energy storage unit, and is used to determine the voltage value at both ends of each energy storage unit. When both are greater than the first preset value, the switch module is controlled to switch to the second conduction state.
The ultra-micro energy conversion circuit according to claim 2 or 3, characterized in that the processor is connected to the output end of the energy storage unit link, and is used to detect the ultra-micro energy conversion when each of the energy storage units is connected in series. The discharge voltage of the micro energy conversion circuit is controlled, and when the discharge voltage is lower than the second preset value, the switch module is controlled to switch to the first conduction state.
The ultra-micro energy conversion circuit according to claim 2 or 3, wherein the processor is further configured to control the switch module when the time in which the switch module is in the second conduction state reaches a second preset time. The switch module switches to the first conductive state.
The ultra-micro energy conversion circuit according to claim 1, further comprising a switching power supply connected to the output end of the energy storage unit link, and the switching power supply is used to convert the energy storage unit chain The output voltage of the circuit is boosted or bucked.
An energy storage device, characterized by comprising at least one ultra-micro energy conversion circuit according to any one of claims 1 to 6.
The energy storage device according to claim 7, characterized in that the energy storage device includes a plurality of ultra-fine energy conversion circuits, each of the ultra-fine energy conversion circuits is respectively connected to the ultra-fine energy source, and each of the ultra-fine energy conversion circuits is connected to the ultra-fine energy source. The ultra-micro energy conversion circuit collects and converts the charging voltage provided by the ultra-micro energy source in a time-sharing manner to output a discharge voltage.