Uninterruptible power supply device based on piezoelectric power generation and self-power-taking uninterruptible power supply system

Abstract

The utility model discloses an uninterruptible power supply device based on piezoelectric power generation and a self-power-taking uninterruptible power supply system. The uninterruptible power supply device based on piezoelectric power generation comprises a plurality of piezoelectric power generation vibrators and a vibration pickup mechanism, the vibration pickup mechanism is connected with the piezoelectric power generation vibrators, is used for being connected with a vibration source body and is configured to transmit vibration generated by the vibration source body to the piezoelectric power generation vibrators; and the piezoelectric power generation vibrator is fixedly connected with the non-vibration source body and is configured to convert the mechanical vibration energy generated by the vibration source body into electric energy. According to the uninterruptible power supply device based on piezoelectric power generation, vibration generated by the vibration source body can be timely converted into electric energy through the plurality of piezoelectric power generation vibrators and the vibration pickup mechanism, and the uninterruptible power supply device is simple in structure and convenient to process and manufacture. And meanwhile, the piezoelectric power generation vibrator is fixedly connected with the non-vibration source body, so that the conversion efficiency of electric energy can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of uninterruptible power supply, in particular to an uninterruptible power supply device based on piezoelectric power generation and a self-powered uninterruptible power supply system. Background Art

[0002] Currently, there are many different energy harvesting technologies that can convert energy in the environment into electrical energy. The development of energy harvesting technology is closely related to its application environment and energy supply method. The energy supply level of different energy harvesting technologies varies. Photoelectric conversion is the use of high-purity single-crystal silicon photovoltaic cells that can generate up to 15000μW / cm 3 It can generate a large amount of electrical energy with a conversion efficiency of nearly 20%. However, solar energy is subject to significant environmental constraints, and its power generation capacity drops significantly on cloudy days and in indoor environments. Wind energy has the advantage of being fuel-free and pollution-free, and my country has abundant wind resources. However, wind power generation has high site selection requirements and is costly. Mechanical vibration is ubiquitous in everyday environments, such as in buildings, roads, bridges, vehicles, ships, and other production and living equipment.

[0003] The main methods for converting mechanical vibration energy into electrical energy include electromagnetic conversion, electrostatic conversion, and piezoelectric conversion. The principle of electromagnetic induction is mature, but the mechanism is complex and bulky. Electrostatic conversion can directly generate low voltage and is easily integrated with microelectromechanical systems (MEMS), but it requires an independent power supply initialization process. Piezoelectric conversion uses the principle of the positive piezoelectric effect to convert mechanical vibration energy into electrical energy without the need for a transformer. However, the piezoelectric energy harvesting devices used in related technologies are complex in structure and difficult to manufacture. Utility Model Content

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, the present invention aims to provide an uninterruptible power supply device and a self-powered uninterruptible power supply system based on piezoelectric power generation, which can convert mechanical vibration energy into electrical energy in a timely and efficient manner.

[0005] To achieve the above-mentioned objectives, the first aspect of the present invention proposes an uninterruptible power supply device based on piezoelectric power generation, which includes: multiple piezoelectric power generation vibrators and a vibration pickup mechanism; the vibration pickup mechanism is connected to the multiple piezoelectric power generation vibrators and is used to connect to a vibration source body, and is configured to transmit the vibration generated by the vibration source body to the piezoelectric power generation vibrator; the piezoelectric power generation vibrator is fixedly connected to a non-vibration source body, and is configured to convert the mechanical vibration energy generated by the vibration source body into electrical energy.

[0006] In addition, the piezoelectric power generation uninterruptible power supply device of the present invention may also have the following additional technical features:

[0007] According to an embodiment of the present invention, the number of the piezoelectric generating vibrators is two.

[0008] According to one embodiment of the present invention, the vibration pickup mechanism includes a support member and a cantilever; the first end of the support member is connected to the vibration source body, and the second end of the support member is connected to the center of the cantilever; the two piezoelectric generating vibrators are located on both sides of the cantilever, and the piezoelectric generating vibrators on both sides are connected together in a topological structure; wherein the cross-sectional area of ​​the first end is greater than the cross-sectional area of ​​the second end.

[0009] According to an embodiment of the present invention, the piezoelectric generator includes a piezoelectric ceramic sheet, and the piezoelectric ceramic sheet is adhered to both sides of the cantilever.

[0010] To achieve the above-mentioned objectives, the second aspect of the present invention proposes a self-powered uninterruptible power supply system, which includes: the above-mentioned piezoelectric power generation-based uninterruptible power supply device; a DC / DC filter circuit, electrically connected to the piezoelectric power generation-based uninterruptible power supply device, and configured to convert the AC voltage output by the piezoelectric power generation-based uninterruptible power supply device into a stable DC voltage; a super energy storage circuit, electrically connected to the DC / DC filter circuit, and configured to store the stable DC voltage; and an energy storage charging circuit, electrically connected to the super energy storage circuit, and configured to manage the electrical energy in the super energy storage circuit.

[0011] In addition, the self-powered uninterruptible power supply system of the present invention may also have the following additional technical features:

[0012] According to one embodiment of the present invention, the system further includes: a compensation protection circuit connected between the piezoelectric power generation-based uninterruptible power supply device and the DC / DC filter circuit, and configured to compensate for poor characteristics in the circuit by adjusting and optimizing circuit parameters.

[0013] According to one embodiment of the present invention, the system further includes: a load output circuit electrically connected to the energy storage charging circuit and connected to the sensor, and configured to provide a stable DC voltage to the sensor.

[0014] According to one embodiment of the present invention, the system further includes: an energy storage battery electrically connected to the energy storage charging circuit.

[0015] The piezoelectric-based uninterruptible power supply device and self-powered uninterruptible power supply system of this utility model utilizes multiple piezoelectric generators and a vibration pickup mechanism to promptly convert the vibrations generated by a vibration source into electrical energy. The device features a simple structure and is easy to manufacture. Furthermore, the piezoelectric generators are fixedly connected to a non-vibration source, improving the efficiency of electrical energy conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a schematic structural diagram of an uninterruptible power supply device based on piezoelectric power generation according to an embodiment of the present invention;

[0018] Figure 2 It is a structural diagram of a self-powered uninterruptible power supply system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more apparent, the following exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in this utility model, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present utility model.

[0020] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0021] It should be understood that the present invention can be implemented in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and will fully convey the scope of the present invention to those skilled in the art.

[0022] In order to fully understand the present invention, a detailed structure will be provided in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementation methods.

[0023] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0024] Please refer to the following Figure 1 -Attached Figure 2 The present invention describes an uninterruptible power supply device based on piezoelectric power generation and a self-powered uninterruptible power supply system according to an embodiment of the present invention.

[0025] Figure 1 It is a structural schematic diagram of an uninterruptible power supply device based on piezoelectric power generation according to an embodiment of the present invention.

[0026] like Figure 1 As shown, the uninterruptible power supply device 10 based on piezoelectric power generation includes: a plurality of piezoelectric power generation vibrators 101 and a vibration pickup mechanism 102.

[0027] The vibration pickup mechanism 102 is connected to the plurality of piezoelectric generator vibrators 101 and is used to connect to the vibration source 201 . The mechanism 102 is configured to transmit the vibration generated by the vibration source to the piezoelectric generator vibrators 101 .

[0028] The piezoelectric generator 101 is fixedly connected to the non-vibration source body 202 and is configured to convert the mechanical vibration energy generated by the vibration source body into electrical energy.

[0029] Preferably, the piezoelectric generator 101 can be a chip made of piezoelectric material and sandwiched between two electrodes. When the chip is subjected to mechanical vibration, it will generate electrical energy due to the piezoelectric effect.

[0030] As an example, the vibration pickup mechanism 102 transmits the vibrations generated by the vibration source to the piezoelectric generator 101 through its connection to the vibration source. Upon receiving the vibrations, the piezoelectric generator 101 converts the mechanical vibration energy into electrical energy due to the piezoelectric effect. This conversion process occurs within the piezoelectric chip, generating electrical energy through the deformation and recovery of the chip.

[0031] The piezoelectric-based uninterruptible power supply (UPS) 10 of the present invention utilizes multiple piezoelectric generators 101 and a vibration pickup mechanism 102 to promptly convert vibrations generated by a vibration source into electrical energy. Its structure is simple and easy to manufacture. Furthermore, the piezoelectric generators 101 are fixedly connected to a non-vibration source, improving electrical energy conversion efficiency.

[0032] In one embodiment of the present invention, the number of the piezoelectric generator oscillators 101 is two.

[0033] Specifically, the vibration pickup mechanism 102 includes a support member 1021 and a cantilever 1022 .

[0034] The first end of the support member is connected to the vibration source, and the second end of the support member is connected to the center of the cantilever; the two piezoelectric generating vibrators 101 are located on both sides of the cantilever, and the piezoelectric generating vibrators 101 on both sides are connected together in a topological structure.

[0035] As an example, two piezoelectric generators 101 are located on both sides of the cantilever and are distributed symmetrically.

[0036] It should be noted that the topology is a network structure with a specific connection method that can enhance the stability and energy transmission efficiency of the system.

[0037] The cross-sectional area of ​​the first end is greater than the cross-sectional area of ​​the second end.

[0038] In this embodiment, the second end of the support member is connected to the center of the cantilever, which can evenly distribute the vibration energy to the piezoelectric generators 101 on both sides. The symmetrical distribution of the two piezoelectric generators 101 ensures that when the cantilever is vibrated, the piezoelectric generators 101 on both sides can effectively receive the vibration energy.

[0039] In one embodiment of the present invention, the piezoelectric generator 101 includes a piezoelectric ceramic sheet, which is adhered to both sides of the cantilever.

[0040] It is worth mentioning that when subjected to external mechanical vibration, the piezoelectric ceramic piece will deform, thereby generating an electric field inside it, and then generating voltage and current.

[0041] As an example, to achieve high connection strength and uniform stress distribution, specialized adhesives or bonding techniques are used to ensure a tight fit between the piezoelectric ceramic sheet and the cantilever.

[0042] In this embodiment, since the piezoelectric ceramic piece has good temperature stability and high piezoelectric performance, the conversion efficiency of electric energy can be improved.

[0043] Based on the above-mentioned uninterruptible power supply device based on piezoelectric power generation, an embodiment of the present utility model proposes a self-powered uninterruptible power supply system.

[0044] like Figure 2 As shown, the self-powered uninterruptible power supply system 1 includes: the above-mentioned uninterruptible power supply device 10 based on piezoelectric power generation, a DC / DC filter circuit 20, a super energy storage circuit 30 and an energy storage charging circuit 40.

[0045] The DC / DC filter circuit 20 is electrically connected to the uninterruptible power supply device 10 based on piezoelectric power generation, and is configured to convert the AC voltage output by the uninterruptible power supply device 10 based on piezoelectric power generation into a stable DC voltage.

[0046] As an example, the DC / DC filter circuit 20 may include an input filter, a switching device, an energy storage element, and a first control subcircuit. The input filter can remove noise and interference from the AC power supply to ensure the purity of the input power. Through the periodic operation of the switching device, combined with the energy storage element and the first control subcircuit, it can achieve efficient conversion from AC to DC, thereby outputting a stable DC voltage.

[0047] The super tank circuit 30 is electrically connected to the DC / DC filter circuit 20 and is configured to store a stable DC voltage.

[0048] As an example, the super energy storage circuit 30 may include a super capacitor and a charging sub-circuit, receive the stable DC voltage output by the DC / DC filter circuit 20, charge the super capacitor through the charging sub-circuit, and store electrical energy.

[0049] The energy storage charging circuit 40 is electrically connected to the super energy storage circuit 30 and is configured to manage the electrical energy in the super energy storage circuit 30 .

[0050] As an example, the energy storage charging circuit 40 may include a discharge subcircuit and a first protection subcircuit. According to the load demand and system status, the discharge subcircuit is controlled to provide electrical energy to the load. At the same time, the protection subcircuit ensures that the system cuts off the power supply in time under abnormal circumstances to avoid damage.

[0051] The present invention's self-powered uninterruptible power supply system 1 integrates a piezoelectric-based uninterruptible power supply device 10, a DC / DC filter circuit 20, a super energy storage circuit 30, and an energy storage charging circuit 40. This system captures vibration energy from the environment, converts it into stable DC power, and effectively stores and manages it. This system is highly efficient, stable, and reliable.

[0052] In one embodiment of the present invention, the self-powered uninterruptible power supply system 1 also includes: a compensation protection circuit 50 connected between the uninterruptible power supply device 10 based on piezoelectric power generation and the DC / DC filter circuit 20, and is configured to compensate for poor characteristics in the circuit by adjusting and optimizing circuit parameters.

[0053] As an example, the compensation protection circuit 50 may include: a monitoring subcircuit, a comparison subcircuit, a second control circuit, and a second protection circuit. The monitoring subcircuit monitors circuit parameters in real time and converts these parameters into processable signals; the comparison subcircuit compares the monitored circuit parameters with preset reference values ​​to determine whether adjustment is necessary; the second control subcircuit, based on the output signal of the comparison circuit, adjusts relevant circuit parameters to compensate for undesirable characteristics. The second control subcircuit typically includes a microprocessor, logic circuits, etc., to implement complex control algorithms and logical judgments; and the second protection subcircuit can cut off power in abnormal situations to protect circuit safety.

[0054] In this embodiment, the compensation protection circuit 50 compensates for poor characteristics by adjusting and optimizing circuit parameters, thereby protecting circuit safety and improving power quality.

[0055] In one embodiment of the present invention, the self-powered uninterruptible power supply system 1 further includes: a load output circuit 60 electrically connected to the energy storage charging circuit 40 and connected to the sensor, and configured to provide a stable DC voltage to the sensor.

[0056] Specifically, the self-powered uninterruptible power supply system 1 further includes: an energy storage battery 70 electrically connected to the energy storage charging circuit 40.

[0057] As an example, the energy storage battery 70 includes a lithium-ion battery, a lead-acid battery, etc.

[0058] In this embodiment, the load output circuit 60 converts the electrical energy from the energy storage charging circuit 40 into a stable DC voltage suitable for loads such as sensors. The load output circuit 60 and the energy storage battery 70 ensure that the power supply system can provide reliable power support to the load in various situations.

[0059] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0060] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0061] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another device, or ignoring or not implementing some features.

[0062] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0063] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various utility model aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the present application should not be interpreted as reflecting the following intention: that the application claimed for protection requires more features than the features explicitly recited in each claim. More precisely, as reflected in the corresponding claims, its utility model point is that the corresponding technical problem can be solved with features that are less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present application.

[0064] It will be understood by those skilled in the art that, except where mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of the devices disclosed herein may be combined in any combination. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature providing the same, equivalent, or similar purpose.

[0065] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0066] It should be noted that the above embodiments illustrate rather than limit the present application, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbols placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0067] The above description is merely a specific embodiment or illustration of a specific embodiment of the present application, and the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. The scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An uninterruptible power supply device based on piezoelectric power generation, characterized in that: The device comprises: a plurality of piezoelectric generating vibrators and a vibration pickup mechanism; The vibration pickup mechanism is connected to the plurality of piezoelectric generating vibrators and is used to connect to a vibration source, and is configured to transmit the vibration generated by the vibration source to the piezoelectric generating vibrators; The piezoelectric generating vibrator is fixedly connected to the non-vibration source body and is configured to convert the mechanical vibration energy generated by the vibration source body into electrical energy.

2. The uninterruptible power supply device based on piezoelectric power generation according to claim 1, characterized in that: The number of the piezoelectric generating vibrators is two.

3. The uninterruptible power supply device based on piezoelectric power generation according to claim 2, characterized in that: The vibration pickup mechanism includes a support member and a cantilever; The first end of the support member is connected to the vibration source, and the second end of the support member is connected to the center of the cantilever; The two piezoelectric generating vibrators are located on both sides of the cantilever, and the piezoelectric generating vibrators on both sides are connected together in a topological structure; The cross-sectional area of ​​the first end is greater than the cross-sectional area of ​​the second end.

4. The uninterruptible power supply device based on piezoelectric power generation according to claim 3, characterized in that: The piezoelectric generator includes a piezoelectric ceramic sheet, and the piezoelectric ceramic sheet is adhered to both sides of the cantilever.

5. A self-powered uninterruptible power supply system, characterized in that: The system comprises: An uninterruptible power supply device based on piezoelectric power generation according to any one of claims 1 to 4; a DC / DC filter circuit electrically connected to the piezoelectric power generation-based uninterruptible power supply device and configured to convert the AC voltage output by the piezoelectric power generation-based uninterruptible power supply device into a stable DC voltage; a super energy storage circuit, electrically connected to the DC / DC filter circuit and configured to store a stable DC voltage; The energy storage charging circuit is electrically connected to the super energy storage circuit and is configured to manage the electric energy in the super energy storage circuit.

6. The self-powered uninterruptible power supply system according to claim 5, characterized in that: The system further includes a compensation protection circuit connected between the uninterruptible power supply device based on piezoelectric power generation and the DC / DC filter circuit, and configured to compensate for poor characteristics in the circuit by adjusting and optimizing circuit parameters.

7. The self-powered uninterruptible power supply system according to claim 5, characterized in that: The system further includes a load output circuit electrically connected to the energy storage charging circuit and to the sensor, and configured to provide a stable DC voltage to the sensor.

8. The self-powered uninterruptible power supply system according to claim 5, characterized in that: The system further includes: an energy storage battery electrically connected to the energy storage charging circuit.

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