Pulse resonance deicing device

Abstract

A pulse resonance deicing device provided by the present invention comprises a solar device, a master control box and an external excitation source device, the solar device comprises a solar panel and a fixed steel support, the solar panel is fixed on a power tower through the fixed steel support, and a communication board, a master control board, a power panel and a storage battery are installed in the master control box. The main control board is in signal connection with the far-end monitoring platform through the communication board, the solar panel is connected with the power panel, the power panel is connected with the storage battery, the storage battery is connected with the main control board, and the external excitation source device comprises a pulse generation module, a resonant frequency detection module and a resonance generation module. The pulse generation module, the resonant frequency detection module and the resonance generation module are connected with the power panel and the main control panel respectively. The device is convenient to install and high in maintenance-free degree. While high-efficiency, low-consumption, pollution-free and safe deicing is realized, the ice and snow coverage condition of the current power transmission line can be remotely transmitted to a remote monitoring system, and related data is provided to assist a user in decision making.

Description

Technical Field

[0001] The invention relates to a pulse resonance deicing device for removing ice and snow mixture on a transmission line. Background Art

[0002] During the operation of high-voltage transmission lines, ice and snow disasters are one of the variables that affect the safe and stable operation of the power grid. The accumulation of ice and snow often leads to the degradation of the electrical performance of bare metal conductors. In high-altitude areas or extreme weather, it can also cause accidents such as line breakage and tower collapse. Traditional deicing methods for transmission lines are mainly through three methods: DC deicing, mechanical deicing, and chemical deicing. The DC deicing process is cumbersome, greatly affected by the site and equipment, and will also affect the normal operation of the line; mechanical deicing generally uses manual knocking or equipment to break the ice. This method not only has high requirements for personnel and equipment, but also easily causes damage to equipment and transmission lines, and even affects personal safety in severe cases; chemical deicing will have a greater impact on the environment, and for transmission lines, the chemical agent has a short action time, and how to accurately deliver the chemical agent is also a problem, and there is no condition for large-scale deployment. Therefore, in the face of this problem, a pulse resonance deicing device with low energy consumption, small environmental impact, convenient maintenance, and high deicing efficiency is invented, which uses pulse force and resonance device to de-ice the transmission line, thereby achieving the purpose of low-cost and high-efficiency deicing. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a pulse resonance deicing device, which applies time domain pulses to the transmission line, quickly detects the natural frequency of the ice and snow mixture of the transmission line, uses a resonance generation module to apply an external excitation source to the transmission line, and tracks the resonance of the transmission line, thereby ensuring that the natural frequency changes caused by the changes in the ice and snow mixture on the transmission line are adjusted and fed back, and the resonance frequency is adjusted in time to achieve closed-loop self-adaptation of the system and stable deicing effect. It can also monitor the line icing situation in real time, and upload the working status of the device to the remote monitoring platform. The background system can record relevant data to achieve intelligent management and control.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A pulse resonance deicing device, characterized in that it comprises a solar device and a main control box installed on a power tower and an external excitation source device installed on a transmission line, wherein the solar device comprises a solar panel and a fixed steel bracket, wherein the solar panel is fixed on the power tower through the fixed steel bracket, The main control box is equipped with a communication board, a main control board, a power board and a battery. The main control board is connected to the remote monitoring platform signal through the communication board, the solar panel is connected to the power board, the power board is connected to the battery, and the battery is connected to the main control board. The external excitation source device includes a pulse generating module, a resonant frequency detecting module and a resonant generating module, wherein the pulse generating module, the resonant frequency detecting module and the resonant generating module are connected to a power supply board and a main control board respectively, and the power supply board serves as a power input terminal of the pulse generating module, the resonant frequency detecting module and the resonant generating module. The pulse generation module, the resonance frequency detection module and the resonance generation module are clamped and fixed on the transmission line with bolts as a whole and are located above the insulator. The pulse generating module is used to convert electrical pulses into mechanical pulses. The pulse generating module includes a pulse coil and an actuating mechanism. The pulse coil is connected to the actuating mechanism. The pulse coil is used to realize the conversion between electricity and magnetism. The actuating mechanism is used to convert magnetic force into mechanical force to apply external excitation force to the power transmission line. The resonant frequency detection module is used to detect the resonant frequency of the transmission line. Each time the pulse generation module applies an external excitation force to the transmission line, the resonant frequency detection module performs a resonant frequency detection on the transmission line. When the resonant frequency detection module detects different natural frequencies of the ice and snow mixture on the transmission line, it feeds it back to the main control board. The main control board calculates and controls the pulse duration and pulse force of the pulse generation module and the resonant frequency of the resonance generation module. The resonance generating module is used to add external excitation force to the ice-snow mixture on the transmission line so that the resonance frequency is consistent with the natural frequency of the ice-snow mixture on the transmission line. The resonance generating module includes a vibration generating device for generating external excitation force.

[0005] In the above structure: A pulse resonance de-icing device proposed in the present invention includes a solar device and a main control box installed on a power tower and an external excitation source device installed on a transmission line, wherein the solar device is used to generate electricity to supply power to the main control box and the external excitation source device, the main control box is used for dominant control, and the external excitation source device is used to clear the ice and snow mixture on the output line.

[0006] The solar device includes a solar panel, which is fixed to the power tower through a fixed steel bracket. The solar panel is fixed around and on the back panel with metal alloy as a structural reinforcement to improve the reliability of the solar panel structure. The fixed steel bracket is made of composite metal material with high strength, corrosion resistance and long service life. The fixed structure uses bolts to achieve L-shaped clamping.

[0007] The main control box is equipped with a communication board, a main control board, a power board and a battery. The main control board is connected to the remote monitoring platform signal through the communication board. The solar panel is connected to the power board through a cable, and the power is transmitted to the battery after rectification and regulation. The battery is connected to the main control board to provide power for it. The power board and the battery are the power part of the entire pulse resonance deicing device. The device is powered by solar energy. After the solar device part completes power collection, it is connected to the power board by a cable to complete rectification and regulation and then transmitted to the battery.

[0008] The external excitation source device includes a pulse generating module, a resonant frequency detection module and a resonance generating module, wherein the pulse generating module, the resonant frequency detection module and the resonance generating module are respectively connected to the power supply board and the main control board, the power supply board serves as the power input end of the pulse generating module, the resonant frequency detection module and the resonance generating module, and the pulse generating module, the resonant frequency detection module and the resonance generating module are clamped as a whole and fixed above the insulator with bolts. The pulse generating module is used to convert electrical pulses into mechanical pulses, thereby realizing wide-range resonant frequency confirmation. The pulse generating module is composed of a pulse coil and an actuator mechanism, wherein the pulse coil is used to realize the conversion between electricity and magnetism, and the actuator mechanism is made of iron-aluminum alloy, and is used to convert magnetic force into mechanical force to apply external excitation force to the conductor. By controlling the electric energy and time passing through the pulse coil, different frequencies can be verified. Each time an external excitation force is applied, the resonant frequency detection module is waited for to detect the resonant frequency of the equipment conductor. The pulse force of the pulse generating module is fed back through the detected resonance amplitude and frequency, so as to more quickly find the resonant frequency range close to the natural frequency of the ice and snow mixture on the transmission line conductor. When the resonant frequency detection module detects different natural frequencies of the ice and snow mixture, it will also feed back the relevant information to the main control board. After the main control board completes the system calculation, it controls the pulse duration and pulse force of the pulse generating module and the resonant frequency of the resonance generating module, thereby ensuring better system tracking and stability. The built-in vibration generating device in the resonance generating module is used to increase the external excitation force on the ice-snow mixture on the transmission line conductor, so that the resonance frequency is consistent with the natural frequency of the ice-snow mixture on the transmission line conductor, thereby achieving rapid de-icing.

[0009] The ice-snow mixture on the transmission line conductor will change its natural frequency due to the continuous falling of ice and snow during the oscillation process. Therefore, the resonant frequency detection module is required to continuously follow and detect the natural frequency of the current ice-snow mixture, so that the resonance generation module can respond to the change of the resonant frequency more quickly to avoid the system becoming an open-loop system due to the lack of a feedback loop.

[0010] Further: the solar device also includes an angle adjustment mechanism, which includes a lifting screw, a limit block and a limit bolt. The solar panel is hingedly connected to a base plate, and the fixed steel bracket is fixed to the base plate. One end of the lifting screw is fixed to the base plate and is located on the end face opposite to the base plate and the solar panel. The limit block is installed on the solar panel through the limit bolt and is located on the end face opposite to the solar panel and the base plate. The lifting screw and the limit block are connected by bolts.

[0011] In the above structure: an angle adjustment mechanism is installed on the solar panel, the angle adjustment mechanism includes a lifting screw, a limit block and a limit bolt, the solar panel is hingedly connected to a base plate, and the fixed steel bracket is fixed to the base plate. The lifting screw adopts an extended screw with a hexagonal opening at the bottom. During installation, the height of the screw is adjusted by an hexagonal wrench, and the position of the limit block is adjusted at the same time. After the angle adjustment is completed, the position of the limit block is fixed with a limit bolt, so as to realize the angle adjustment of the solar panel as a whole, and the fixed steel bracket is fixed and clamped on the power tower by bolts.

[0012] Furthermore: the solar panel is made of single crystal silicon.

[0013] In the above structure: the solar panel is made of monocrystalline silicon, which has higher efficiency and longer life than polycrystalline silicon.

[0014] Further: an I-shaped mounting piece is arranged on the back of the main control box, a first through-core fixing hole and a second through-core fixing hole are arranged in the middle of the I-shaped mounting piece, and a first bolt fixing hole and a second bolt fixing hole are arranged at both ends.

[0015] In the above structure: the main control box adopts a high-grade closed waterproof box with good sealing performance, insect-proof, moisture-proof and waterproof. An "I"-shaped installation component is installed on the back of the main control box to facilitate fixing on the transmission line tower. The connection with the power tower can be installed by clamping from the first core fixing hole and the second core fixing hole with a steel tie, or by fixing and installing from the first bolt fixing hole and the second bolt fixing hole with bolts.

[0016] Further: the communication board has a built-in APN card for realizing data transmission and remote startup with a remote monitoring platform.

[0017] In the above structure: through the APN card, data transmission and remote startup with the remote monitoring platform can be realized, helping the remote monitoring platform to achieve centralized control of the icing conditions of different lines.

[0018] Further: the battery is a lithium iron phosphate battery.

[0019] In the above structure: the battery adopts lithium iron phosphate battery, which can effectively ensure the power supply safety of the system.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The pulse resonance deicing device proposed by the present invention is easy to install and has a high degree of maintenance-free. While achieving high-efficiency, low-consumption, pollution-free and safe deicing, it can also transmit the current snow and ice coverage of the transmission line to the remote monitoring system to provide relevant data to assist users in making decisions. When necessary, it can be remotely started by relevant personnel, which not only ensures the safe and stable operation of the high-voltage transmission line of the power grid, reduces the workload of operation and maintenance and repair personnel, improves work efficiency, but also increases the intelligent management means of the high-voltage transmission line of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the installation of the present invention; Figure 2 It is a schematic diagram of the solar panel structure; Figure 3 It is a schematic diagram of the overall structure of the solar panel; Figure 4 is a schematic diagram of the structure of an external excitation source device; Figure 5 It is a schematic diagram of the main control box structure; Figure 6 This is a schematic diagram of the side structure of the main control box.

[0022] List of reference numerals: 1. Solar device; 2. Main control box; 3. External excitation source device; 4. Solar panel; 5. Fixed steel bracket; 6. Angle adjustment structure; 7. Lifting screw; 8. Limit block; 9. Limit bolt; 10. Pulse generating module; 11. Resonance frequency detection module; 12. Resonance generating module; 13. Communication board; 14. Main control board; 15. Power board; 16. Battery; 17. First through-core fixing hole; 18. Second through-core fixing hole; 19. First bolt fixing hole; 20. Second bolt fixing hole; 21. Insulator. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: like Figure 1-6 As shown, the present invention proposes a pulse resonance deicing device, comprising a solar device 1 and a main control box 2 installed on a power tower and an external excitation source device 3 installed on a transmission line, wherein the solar device 1 comprises a solar panel 4 and a fixed steel bracket 5, wherein the solar panel 4 is fixed on the power tower by the fixed steel bracket 5. The main control box 2 is equipped with a communication board 13, a main control board 14, a power board 15 and a battery 16. The main control board 14 is connected to the remote monitoring platform signal through the communication board 13, the solar panel 4 is connected to the power board 15, the power board 15 is connected to the battery 16, and the battery 16 is connected to the main control board 14. The external excitation source device 3 includes a pulse generating module 10, a resonance frequency detecting module 11 and a resonance generating module 12. The pulse generating module 10, the resonance frequency detecting module 11 and the resonance generating module 12 are connected to a power supply board 15 and a main control board 14 respectively. The power supply board 15 serves as a power input terminal of the pulse generating module 10, the resonance frequency detecting module 11 and the resonance generating module 12. The pulse generating module 10, the resonance frequency detecting module 11 and the resonance generating module 12 are clamped and fixed on the transmission line with bolts as a whole and are located above the insulator 21. The pulse generating module 10 is used to convert electrical pulses into mechanical pulses. The pulse generating module 10 includes a pulse coil and an actuating mechanism. The pulse coil is connected to the actuating mechanism. The pulse coil is used to realize the conversion between electricity and magnetism. The actuating mechanism is used to convert magnetic force into mechanical force to apply external excitation force to the power transmission line. The resonant frequency detection module 11 is used to detect the resonant frequency of the transmission line. Each time the pulse generation module 10 applies an external excitation force to the transmission line, the resonant frequency detection module 11 performs a resonant frequency detection on the transmission line. When the resonant frequency detection module 11 detects different natural frequencies of the ice and snow mixture on the transmission line, it feeds it back to the main control board 14. The main control board 14 calculates and controls the pulse duration and pulse force of the pulse generation module 10 and the resonant frequency of the resonance generation module 12. The resonance generating module 12 is used to add external excitation force to the ice-snow mixture on the transmission line so that the resonance frequency is consistent with the natural frequency of the ice-snow mixture on the transmission line. The resonance generating module 12 includes a vibration generating device for generating external excitation force.

[0024] A pulse resonance de-icing device proposed in the present invention includes a solar device 1 and a main control box 2 installed on a power tower and an external excitation source device 3 installed on a transmission line, wherein the solar device 1 is used to generate electricity to supply power to the main control box 2 and the external excitation source device 3, the main control box 2 is used for dominant control, and the external excitation source device 3 is used to clear the ice and snow mixture on the output line.

[0025] The solar device 1 includes a solar panel 4, which is fixed to the power tower through a fixed steel bracket 5. The solar panel 4 is fixed around and on the back panel with a metal alloy as a structural reinforcement to improve the reliability of the solar panel 4 structure. The fixed steel bracket 5 is made of composite metal material with high strength, corrosion resistance and long service life. The fixed structure uses bolts to achieve L-shaped clamping.

[0026] The main control box 2 is installed with a communication board 13, a main control board 14, a power board 15 and a battery 16. The main control board 14 is connected to the remote monitoring platform signal through the communication board 13. The solar panel 4 is connected to the power board 15 through a cable, and the power is transmitted to the battery 16 after rectification and regulation. The battery 16 is connected to the main control board 14 to provide power for it. The power board 15 and the battery 16 are the power part of the whole set of pulse resonance deicing device. The device is powered by solar energy. After the solar device 1 partially completes power collection, it is connected to the power board 15 by a cable to complete rectification and regulation and then transmitted to the battery 16.

[0027] The external excitation source device 3 includes a pulse generating module 10, a resonant frequency detection module 11 and a resonance generating module 12, wherein the pulse generating module 10, the resonant frequency detection module 11 and the resonance generating module 12 are respectively connected to a power supply board 15 and a main control board 14, the power supply board 15 serves as a power input terminal of the pulse generating module 10, the resonant frequency detection module 11 and the resonance generating module 12, and the pulse generating module 10, the resonant frequency detection module 11 and the resonance generating module 12 are integrally clamped and fixed above the insulator 21 with bolts. The pulse generating module 10 is used to convert electrical pulses into mechanical pulses, thereby realizing wide-range resonant frequency confirmation. The pulse generating module 10 is composed of a pulse coil and an actuating mechanism, wherein the pulse coil is used to realize the conversion between electricity and magnetism, and the actuating mechanism is made of iron-aluminum alloy, and is used to convert magnetic force into mechanical force to apply external excitation force to the conductor. By controlling the electric energy and time passing through the pulse coil, verification of different frequencies can be realized. Each time an external excitation force is applied, the resonant frequency detection module 11 is waited for to detect the resonant frequency of the primary equipment conductor, and the pulse force of the pulse generating module 10 is fed back through the detected resonant amplitude and frequency, so as to more quickly find the resonant frequency range close to the natural frequency of the ice and snow mixture on the transmission line conductor. When the resonant frequency detection module 11 detects different natural frequencies of the ice and snow mixture, it will also feed back the relevant information to the main control board 14. After the main control board 14 completes the system calculation, it controls the pulse duration and pulse force of the pulse generating module 10 and the resonant frequency of the resonance generating module 12, thereby ensuring better system tracking and stability. The vibration generating device built into the resonance generating module 12 is used to increase the external excitation force on the ice-snow mixture on the transmission line conductor, so that the resonance frequency is consistent with the natural frequency of the ice-snow mixture on the transmission line conductor, thereby achieving rapid de-icing.

[0028] The ice-snow mixture on the transmission line conductor will change its natural frequency due to the continuous falling of ice and snow during the oscillation process. Therefore, the resonant frequency detection module 11 is required to continuously follow and detect the natural frequency of the current ice-snow mixture, so that the resonance generation module 12 can respond to the change of the resonant frequency more quickly to avoid the system becoming an open-loop system due to the lack of a feedback loop.

[0029] In this embodiment: the solar device 1 also includes an angle adjustment mechanism, which includes a lifting screw 7, a limit block 8 and a limit bolt 9. The solar panel 4 is hingedly connected to a base plate, and the fixed steel bracket 5 is fixed to the base plate. One end of the lifting screw 7 is fixed to the base plate and is located on the end face of the base plate opposite to the solar panel 4. The limit block 8 is installed on the solar panel 4 through the limit bolt 9 and is located on the end face of the solar panel 4 opposite to the base plate. The lifting screw 7 and the limit block 8 are connected by bolts. An angle adjustment mechanism is installed on the solar panel 4, and the angle adjustment mechanism includes a lifting screw 7, a limit block 8 and a limit bolt 9. The solar panel 4 is hingedly connected to a base plate, and a fixed steel bracket 5 is fixed to the base plate. The lifting screw 7 adopts an extended screw with a hexagonal opening at the bottom. During installation, the height of the screw is adjusted by an hexagonal wrench, and the position of the limit block 8 is adjusted at the same time. After the angle adjustment is completed, the limit block 8 is fixed with a limit bolt 9 to achieve the angle adjustment of the solar panel 4 as a whole, and the fixed steel bracket 5 is fixed and clamped on the power tower by bolts.

[0030] In this embodiment, the solar panel 4 is made of monocrystalline silicon, which has higher efficiency and longer life than polycrystalline silicon.

[0031] In this embodiment: the back of the main control box 2 is provided with an I-shaped mounting piece, the middle of the I-shaped mounting piece is provided with a first through-core fixing hole 17 and a second through-core fixing hole 18, and the two ends are provided with a first bolt fixing hole 19 and a second bolt fixing hole 20. The main control box 2 adopts a high-grade closed waterproof box with good sealing performance, insect-proof, moisture-proof and waterproof. An "I"-shaped mounting component is installed on the back of the main control box 2 for easy fixing on the transmission line tower. The connection with the power tower can be installed by clamping from the first through-core fixing hole 17 and the second through-core fixing hole 18 with a steel tie, or by fixing and installing from the first bolt fixing hole 19 and the second bolt fixing hole 20 with bolts.

[0032] In this embodiment: the communication board 13 is built with an APN card for data transmission and remote start with the remote monitoring platform. Through the APN card, data transmission and remote start with the remote monitoring platform can be realized, helping the remote monitoring platform to achieve centralized control of ice coverage conditions of different lines.

[0033] In this embodiment, the battery 16 is a lithium iron phosphate battery, which can effectively ensure the power supply safety of the system.

[0034] The pulse resonance deicing device proposed by the present invention is easy to install and has a high degree of maintenance-free. While achieving high-efficiency, low-consumption, pollution-free and safe deicing, it can also transmit the current snow and ice coverage of the transmission line to the remote monitoring system to provide relevant data to assist users in making decisions. When necessary, it can be remotely started by relevant personnel, which not only ensures the safe and stable operation of the high-voltage transmission line of the power grid, reduces the workload of operation and maintenance and repair personnel, improves work efficiency, but also increases the intelligent management means of the high-voltage transmission line of the power grid.

[0035] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A pulse resonance deicing device, characterized in that: The invention comprises a solar device (1) and a main control box (2) installed on a power tower, and an external excitation source device (3) installed on a transmission line. The solar device (1) comprises a solar panel (4) and a fixed steel bracket (5). The solar panel (4) is fixed on the power tower by the fixed steel bracket (5). The main control box (2) is equipped with a communication board (13), a main control board (14), a power board (15) and a storage battery (16). The main control board (14) is connected to the remote monitoring platform signal through the communication board (13). The solar panel (4) is connected to the power board (15). The power board (15) is connected to the storage battery (16). The storage battery (16) is connected to the main control board (14). The external excitation source device (3) comprises a pulse generating module (10), a resonance frequency detecting module (11) and a resonance generating module (12); the pulse generating module (10), the resonance frequency detecting module (11) and the resonance generating module (12) are respectively connected to a power supply board (15) and a main control board (14); the power supply board (15) serves as a power input terminal of the pulse generating module (10), the resonance frequency detecting module (11) and the resonance generating module (12); The pulse generation module (10), the resonance frequency detection module (11) and the resonance generation module (12) are integrally clamped and fixed on the transmission line with bolts and are located above the insulator (21). The pulse generating module (10) is used to convert electrical pulses into mechanical pulses, and comprises a pulse coil and an actuating mechanism, wherein the pulse coil is connected to the actuating mechanism, wherein the pulse coil is used to realize the conversion between electricity and magnetism, and the actuating mechanism is used to convert magnetic force into mechanical force to apply external excitation force to the power transmission line. The resonant frequency detection module (11) is used to detect the resonant frequency of the transmission line. Each time the pulse generation module (10) applies an external excitation force to the transmission line, the resonant frequency detection module (11) detects the resonant frequency of the transmission line. When the resonant frequency detection module (11) detects different natural frequencies of the ice and snow mixture on the transmission line, it feeds back the frequencies to the main control board (14). The main control board (14) calculates and controls the pulse duration and pulse force of the pulse generation module (10) and the resonant frequency of the resonant generation module (12). The resonance generating module (12) is used to add an external excitation force to the ice-snow mixture on the transmission line so that the resonance frequency is consistent with the natural frequency of the ice-snow mixture on the transmission line. The resonance generating module (12) comprises a vibration generating device for generating the external excitation force.

2. A pulse resonance deicing device according to claim 1, characterized in that: The solar device (1) also includes an angle adjustment mechanism, which includes a lifting screw (7), a limit block (8) and a limit bolt (9). The solar panel (4) is hingedly connected to a base plate, and the fixed steel bracket (5) is fixed to the base plate. One end of the lifting screw (7) is fixed to the base plate and is located on the end surface of the base plate opposite to the solar panel (4). The limit block (8) is installed on the solar panel (4) through the limit bolt (9) and is located on the end surface of the solar panel (4) opposite to the base plate. The lifting screw (7) and the limit block (8) are connected by bolts.

3. A pulse resonance deicing device according to claim 2, characterized in that: The solar panel (4) is made of single crystal silicon.

4. The pulse resonance deicing device according to claim 1, characterized in that: The back of the main control box (2) is provided with an I-shaped mounting piece, the middle of the I-shaped mounting piece is provided with a first through-core fixing hole (17) and a second through-core fixing hole (18), and the two ends are provided with a first bolt fixing hole (19) and a second bolt fixing hole (20).

5. The pulse resonance deicing device according to claim 1, characterized in that: The communication board (13) is equipped with an APN card for realizing data transmission and remote startup with a remote monitoring platform.

6. The pulse resonance deicing device according to claim 1, characterized in that: The storage battery (16) is a lithium iron phosphate battery.

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