CN106487047A - Electric power system in conjunction with the low-power consumption on-line monitoring equipment of efficient ultracapacitor - Google Patents

Abstract

The invention provides a power supply system for low-power on-line monitoring equipment combined with high-efficiency supercapacitors, which includes a power supply unit, a power conversion device, and a power storage device that are electrically connected in sequence. The storage device is electrically connected to the low-power on-line monitoring device; the power supply unit includes a metal plate and polycrystalline piezoelectric material plates respectively fixed on both sides of the metal plate; one of the polycrystalline piezoelectric material plates is closely attached to the outer wall of the power equipment combined; the electric energy storage device is a flat supercapacitor. The power supply system proposed by the present invention has the advantages of simple structure, no electromagnetic interference, no pollution, easy processing, and easy miniaturization and integration, and provides a stable, reliable and effective power supply source for low-power on-line monitoring equipment , thereby ensuring the reliable operation of the low-power on-line monitoring equipment on the power equipment.

Description

Power supply system for low-power on-line monitoring equipment combined with high-efficiency supercapacitors

technical field

The invention relates to the field of power supply for electric equipment, in particular to a power supply system for low-power on-line monitoring equipment combined with high-efficiency supercapacitors.

Background technique

The monitoring of the operating status of power equipment and transmission lines is of great significance to prevent accidents and ensure the safety of power grid operation. The energy supply problem of the online monitoring device has always been one of the key technical problems restricting its function. With the development of sensing technology, most online monitoring devices use low-power online monitoring equipment, such as low-power sensor chips, but the problem of its stable energy supply still needs to be solved.

Existing solutions still adopt the traditional energy supply method, which uses chemical energy batteries as the main energy supply source. Although chemical energy batteries are widely used for their ease of use, more and more shortcomings in the use process have also attracted people's increasing attention. First, chemical energy batteries and their auxiliary devices occupy a considerable part of micro-electromechanical systems. space and weight; second, the production of chemical energy batteries, waste of materials during use, environmental pollution, and difficulty in recycling have become increasingly prominent; third, the service life of chemical energy batteries is short, and as the voltage drops, the performance of the entire system will decrease. Research on new energy supply technologies is critical.

Therefore, how to design a power supply system with a simple structure, no electromagnetic interference, no pollution, easy processing and easy to realize miniaturization and integration of low-power on-line monitoring equipment combined with high-efficiency supercapacitors is an urgent need for those skilled in the art. solved problem.

Contents of the invention

In view of this, the present invention provides a power supply system for low-power on-line monitoring equipment combined with high-efficiency supercapacitors, which provides a stable, reliable and effective power supply source for low-power on-line monitoring equipment, thereby ensuring the power supply on the power equipment Reliable operation of low-power online monitoring equipment.

The purpose of the present invention is achieved through the following technical solutions:

Combined with a power supply system for low-power on-line monitoring equipment with high-efficiency supercapacitors, the low-power on-line monitoring device is an electrical device with a power supply voltage between 1v and 5v, and it is arranged on the outer wall of the power equipment; the power supply system includes A power supply unit, a power conversion device and a power storage device electrically connected in sequence;

The power supply unit is closely attached to the outer wall of the power equipment;

The electric energy storage device is electrically connected with the low power consumption online monitoring device.

Preferably, the power supply unit includes a metal plate and polycrystalline piezoelectric material plates respectively fixed on both sides of the metal plate;

One of the polycrystalline piezoelectric material plates is closely attached to the outer wall of the electric device.

Preferably, the area of the plate surface of the metal plate is larger than the plate area of the polycrystalline piezoelectric material plate;

The partially exposed surface of the metal plate on which the polycrystalline piezoelectric material plate is not installed is a fixed surface;

The fixing plate surface is fixed close to the outer wall of the electrical equipment.

Preferably, the metal plate is an L-shaped metal plate; the two polycrystalline piezoelectric material plates are respectively installed on both sides of the long plate of the L-shaped metal plate; the short plate of the L-shaped metal plate is the fixed surface;

One of the polycrystalline piezoelectric material plates is tightly sandwiched between the long plate and the outer wall of the electric device;

The fixing plate surface is fixed on the foundation feet with foundation bolts.

Preferably, the electrical energy storage device is a planar supercapacitor.

Preferably, the planar supercapacitor includes a first unit and an end unit that are both plate-type and connected in series;

The first unit sequentially includes an outlet positive electrode, a double capacitor layer and a porous metal collector from top to bottom;

The end unit sequentially includes a porous metal collector, a double capacitor layer, and a negative electrode for outgoing lines from top to bottom;

Two adjacent porous metal collectors are connected.

Preferably, a connection unit is provided between the first unit and the last unit;

The connection unit includes two of the porous metal collectors and a double capacitor layer interposed between the two of the porous metal collectors.

Preferably, the double capacitor layer includes two graphene porous carbon electrodes and a diaphragm sandwiched between the two graphene porous carbon electrodes;

Both sides of the separator are filled with electrolyte.

It can be seen from the above technical solutions that the present invention provides a power supply system for low-power on-line monitoring equipment combined with high-efficiency supercapacitors, including a power supply unit, a power conversion device, and a power storage device that are electrically connected in sequence, and the power supply unit and power The outer wall of the equipment is closely attached; the electric energy storage device is electrically connected to the low-power on-line monitoring device; the electric energy supply unit includes a metal plate and polycrystalline piezoelectric material plates respectively fixed on both sides of the metal plate; one of the polycrystalline piezoelectric material plates The board is closely attached to the outer wall of the power equipment; the electric energy storage device is a flat-plate supercapacitor. The power supply system proposed by the present invention has the advantages of simple structure, no electromagnetic interference, no pollution, easy processing, and easy miniaturization and integration, and provides a stable, reliable and effective power supply source for low-power on-line monitoring equipment , thereby ensuring the reliable operation of the low-power on-line monitoring equipment on the power equipment.

Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects:

1. In the technical solution provided by the present invention, the power supply unit is closely attached to the outer wall of the power equipment through the electric energy supply unit, the power conversion device and the power storage device that are electrically connected in sequence; the power storage device and the low-power on-line monitoring device Electrical connection; the power supply unit includes a metal plate and polycrystalline piezoelectric material plates fixed on both sides of the metal plate; one of the polycrystalline piezoelectric material plates is closely attached to the outer wall of the power equipment; the electric energy storage device is a flat super capacitor. The power supply system proposed by the present invention has the advantages of simple structure, no electromagnetic interference, no pollution, easy processing, and easy miniaturization and integration, and provides a stable, reliable and effective power supply source for low-power on-line monitoring equipment , thereby ensuring the reliable operation of the low-power on-line monitoring equipment on the power equipment.

2. In the technical solution provided by the present invention, the piezoelectric material used is a multi-element single crystal piezoelectric body, and the piezoelectric coefficient is 3 times that of traditional piezoelectric ceramics; its service life is long; energy collection is realized by using environmental vibrations, which can be used in principle To obtain long-term reliable power supply, its service life only depends on the energy harvesting device itself; it is clean, environmentally friendly, and pollution-free. This kind of energy harvesting technology mainly uses the positive piezoelectric effect of piezoelectric materials to realize the coupling of mechanical energy and electrical energy, and the working process will not produce polluting waste. It is a typical green technology; through reasonable structural design, it can be realized with micro The integration of mechanical and electrical systems is in line with the trend of miniaturization of modern electronic devices and products.

3. In the technical solution provided by the present invention, the power generation depends on the power equipment and transmission line's own vibration during operation, the power generation source is continuous and stable, and it is environmentally friendly and pollution-free.

4. The technical solution provided by the present invention can be attached to the existing on-line monitoring device as a new accessory, and it is not necessary to replace the entire device.

5. The technical solution provided by the present invention, the use of graphene electrodes; has ultra-high conductivity and huge specific surface area, compared with traditional activated carbon electrodes, it can greatly improve the energy storage density of existing supercapacitors, reaching 8Wh/ L, at the same time, it has the advantages of high power density, fast charge and discharge, long cycle life, and wide operating temperature range; on the other hand, because the internal resistance of supercapacitors is much smaller than that of chemical batteries, they can be charged by a small current (uA level), Ideal for micro energy harvesting systems. In structural form,

6. The technical solution provided by the present invention adopts a flat-plate supercapacitor; it is easier to combine with the piezoelectric device and the equipment body, and the overall volume utilization rate is high.

7. In the technical solution provided by the present invention, the fixing plate of the L-shaped metal plate is fixed on the foot of the electrical equipment through anchor bolts to form a vertical cantilever piezoelectric power generation device; the pressure between the electrical equipment and the metal plate is ensured. Close fit of electrical materials.

8. The technical solution provided by the present invention is widely used and has significant social and economic benefits.

Description of drawings

Fig. 1 is the structural representation of the power supply system of the low-power on-line monitoring equipment combined with high-efficiency supercapacitor of the present invention;

Fig. 2 is a schematic diagram of the connection structure between the power supply system and the power equipment of the present invention;

Fig. 3 is a schematic structural diagram of the electric energy storage device in the power supply system of the present invention.

Among them, 1-electric energy supply unit, 2-electric energy conversion device, 3-electric energy storage device, 4-electric power equipment, 5-low power consumption online monitoring device, 6-metal plate, 601-long plate, 602-fixed plate, 7 -polycrystalline piezoelectric material plate, 8-foot, 9-plate supercapacitor, 10-first unit, 11-last unit, 12-outlet positive electrode, 13-double capacitor layer, 14-porous metal collector, 15 -Outlet negative electrode, 16-connection unit, 17-graphene porous carbon electrode, 18-diaphragm, 19-anchor bolt.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

As shown in Figure 1, the present invention provides a power supply system for low-power online monitoring equipment combined with high-efficiency supercapacitors. The low-power online monitoring device 5 is an electrical device with a supply voltage between 1v and 5v, and it is set in the power On the outer wall of the device 4; the power supply system includes a power supply unit 1, a power conversion device 2 and a power storage device 3 that are electrically connected in sequence;

The power supply unit 1 is closely attached to the outer wall of the power equipment 4;

The electric energy storage device 3 is electrically connected with the low power consumption online monitoring device 5 .

The power supply unit 1 includes a metal plate 6 and a polycrystalline piezoelectric material plate 7 respectively fixed on both sides of the metal plate 6; the piezoelectric coefficient of the polycrystalline piezoelectric material is three times that of traditional piezoelectric ceramics, and can convert mechanical energy, strain, and vibration When the mechanical deformation is applied to the piezoelectric element, it will cause the polarization generated by the relative movement of the positive and negative charge centers inside the piezoelectric element, resulting in the appearance of bound charges with opposite signs on the two surfaces of the piezoelectric element, and the charge density is the same as The magnitude of the external force is proportional, and this phenomenon is called the positive piezoelectric effect.

Polycrystalline piezoelectric materials have the advantages of simple structure, no electromagnetic interference, no pollution, easy processing, and easy miniaturization and integration. In recent years, they have received extensive attention in the field of self-powered power supply research.

Vibration is unavoidable during the operation of power equipment 4 or power transmission lines, which provides a working environment for the use of piezoelectric vibrators to convert vibration energy into electrical energy; The device is an ideal solution to the power supply of low-power products such as sensors.

One of the polycrystalline piezoelectric material plates 7 is closely attached to the outer wall of the electric device 4 .

The area of the plate surface of the metal plate 6 is larger than the plate area of the polycrystalline piezoelectric material plate 7;

The part of the bare surface on the metal plate 6 that is not equipped with the polycrystalline piezoelectric material plate 7 is the surface of the fixed plate 602;

The surface of the fixing plate 602 is fixed close to the outer wall of the electric device 4 .

In this embodiment, the low-power online monitoring device is a low-power sensor chip; the power device 4 is a transformer.

As shown in Figure 2, the metal plate 6 is an L-shaped metal plate 6; two polycrystalline piezoelectric material plates 7 are respectively installed on the two sides of the long plate 601 of the L-shaped metal plate 6; the short plate of the L-shaped metal plate 6 is fixed 602 faces of the board;

One of the polycrystalline piezoelectric material plates 7 is tightly sandwiched between the long plate 601 and the outer wall of the electric device 4;

The surface of the fixed plate 602 is fixed on the anchor 8 with anchor bolts 19; a vertical cantilever piezoelectric power generation device is formed, and after being charged to the flat supercapacitor 9, it supplies power to the low-power on-line monitoring equipment originally arranged around the transformer. The piezoelectric material 1 is deformed by the vibration of the power equipment 4, and the electric charge generated is connected to the electric energy conversion device 2 through a wire, and converted into a direct current for charging a graphene-based supercapacitor 9 with a high energy storage density. The supercapacitor 9 is on-line to the load, that is, the transformer Monitor sensor power supply.

The electric energy storage device 3 is a flat-plate supercapacitor 9; a small current is charged to the flat-plate supercapacitor 9 based on graphene-based technology, which has high energy storage density, low internal resistance, better charging performance and environmental protection than batteries, and small currents can also be used. storage.

The flat-plate supercapacitor 9 includes a first unit 10 and an end unit 11 which are plate-type and connected in series;

The first unit 10 sequentially includes an outlet positive electrode 12, a double capacitor layer 13 and a porous metal collector 14 from top to bottom;

The final unit 11 sequentially includes a porous metal collector 14, a double capacitor layer 13 and a negative electrode 15 from top to bottom;

Two adjacent porous metal collector electrodes 14 are connected.

As shown in Figure 3, a connection unit 16 is provided between the first unit 10 and the end unit 11; in this embodiment, three connection units 16 are taken as an example;

The connection unit 16 includes two porous metal collectors 14 and a double capacitor layer 13 sandwiched between the two porous metal collectors 14; the porous metal collectors 14 are respectively connected to a graphene-based carbon electrode and the corresponding The first graphene-based carbon electrode adjacent to the next small unit in series forms two pairs of electrodes. The voltage of the series cells is 2.7V*(2+3)=13.5V. Different from the traditional winding supercapacitor 9, the planar supercapacitor 9 used in this patent is easier to combine with the piezoelectric device and the transformer body, and the overall volume utilization rate is high.

The double capacitor layer 13 includes two graphene porous carbon electrodes 17 and a diaphragm 18 sandwiched between the two graphene porous carbon electrodes 17; It can greatly improve the energy storage density of the existing supercapacitor 9, reaching 8Wh/L, and has the advantages of high power density, fast charging and discharging, long cycle life, and wide operating temperature range; on the other hand, due to the supercapacitor 9 The resistance is much smaller than the internal resistance of the chemical battery, and it can be charged by a small current (uA level), which is very suitable for micro energy harvesting systems. In terms of structure, this patent uses a flat-plate supercapacitor 9, which is easier to combine with the piezoelectric device and the equipment body, and the overall volume utilization rate is high.

Both sides of the separator 18 are filled with electrolyte.

The energy supply system provided by the present invention is attached to the vibration monitoring device, and the piezoelectric material is deformed by using the vibration of the power equipment or transmission line when it is working, and converted into continuous tiny electric energy, which is charged to a supercapacitor with a high energy storage density to replace The battery powers the vibration monitoring sensor.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify or equivalently replace the specific embodiments of the present invention. , and any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention are all within the protection scope of the claims of the pending application of the present invention.

Claims (8)

1. The power supply system of low-power online monitoring equipment combined with high-efficiency supercapacitors, the low-power online monitoring device is an electrical device with a power supply voltage between 1v and 5v, and it is arranged on the outer wall of the power equipment; it is characterized in that , the power supply system includes a power supply unit, a power conversion device, and a power storage device that are electrically connected in sequence; The power supply unit is closely attached to the outer wall of the power equipment; The electric energy storage device is electrically connected with the low power consumption online monitoring device. 2. The power supply system according to claim 1, wherein the power supply unit comprises a metal plate and polycrystalline piezoelectric material plates respectively fixed on both sides of the metal plate; One of the polycrystalline piezoelectric material plates is closely attached to the outer wall of the electric device. 3. The power supply system according to claim 2, wherein the area of the plate surface of the metal plate is larger than the plate area of the polycrystalline piezoelectric material plate; The partially exposed surface of the metal plate on which the polycrystalline piezoelectric material plate is not installed is a fixed surface; The fixing plate surface is fixed close to the outer wall of the electrical equipment. 4. The power supply system according to claim 3, wherein the metal plate is an L-shaped metal plate; two polycrystalline piezoelectric material plates are respectively installed on both sides of the long plate of the L-shaped metal plate ; The short plate of the L-shaped metal plate is the fixed plate surface; One of the polycrystalline piezoelectric material plates is tightly sandwiched between the long plate and the outer wall of the electric device; The fixing plate surface is fixed on the foundation feet with foundation bolts. 5. The power supply system according to claim 1, wherein the electric energy storage device is a planar supercapacitor. 6. The power supply system according to claim 5, wherein the flat-plate supercapacitor comprises a first unit and an end unit which are all plate-type and connected in series; The first unit sequentially includes an outlet positive electrode, a double capacitor layer and a porous metal collector from top to bottom; The end unit sequentially includes a porous metal collector, a double capacitor layer, and a negative electrode for outgoing lines from top to bottom; Two adjacent porous metal collectors are connected. 7. The power supply system according to claim 6, wherein a connection unit is provided between the first unit and the last unit; The connection unit includes two of the porous metal collectors and a double capacitor layer interposed between the two of the porous metal collectors. 8. The power supply system as claimed in claim 6 or 7, wherein the double capacitor layer comprises two graphene porous carbon electrodes and a diaphragm sandwiched between the two graphene porous carbon electrodes; Both sides of the separator are filled with electrolyte.