Portable maintenance instrument for undervoltage assembly

Abstract

The utility model provides a portable maintenance instrument for an under-voltage assembly, which relates to the technical field of photovoltaic power station assembly maintenance and can provide direct current or alternating current supply for the under-voltage assembly according to actual requirements by arranging a power supply module, a protection module, an output module, a conversion module, a first switch and a detection module. The use mode is more flexible, detection signals can be received, and detection result information is generated based on the detection signals. According to the mode, the problem of large disassembly volume of the under-voltage assembly can be solved, the labor intensity and workload of maintenance personnel are reduced, the maintenance efficiency of the under-voltage assembly is improved, meanwhile, the problem of long wire power supply can be solved, the electric shock risk of operators is reduced, and the under-voltage assembly can be applied to places with complex terrains and relatively high installation heights and has high practicability. Maintenance difficulty is reduced and power generation efficiency of a photovoltaic power station is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power station component maintenance, in particular to a portable maintenance instrument for undervoltage components. Background Art

[0002] With the rapid development of photovoltaic power station technology, photovoltaic modules are also becoming more mature. Among them, photovoltaic modules are the core components of photovoltaic power generation. However, due to the problems of desoldering and cold soldering in the reflow belt of the photovoltaic module junction box, the module is under-voltage, which seriously affects the power generation efficiency of the power station.

[0003] At present, undervoltage components need to be disassembled and taken to the maintenance point for maintenance, which requires a lot of manpower and material resources for disassembly and transportation, and the work intensity is high and the maintenance efficiency is low. At the same time, an external power supply is often required during on-site maintenance. When there is no power supply nearby, the power supply can only be obtained by pulling a long wire, which not only makes the maintenance work more cumbersome, but also increases the risk of electric shock for operators. Therefore, it is necessary to design a portable undervoltage component repair instrument to reduce the difficulty of repairing undervoltage components and improve the maintenance efficiency and power generation efficiency of photovoltaic power stations.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a portable maintenance instrument for an undervoltage component to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A portable maintenance instrument for undervoltage components, applicable to undervoltage components, characterized by comprising: a power module, a protection module, an output module, a conversion module, a first switch, and a detection module;

[0008] The power module is electrically connected to the protection module, and is used to provide direct current, and send it to the output module after passing through the protection module;

[0009] The protection module is electrically connected to the output module and is used to limit the direct current provided by the power module and disconnect the circuit to protect the power module when the limit is exceeded.

[0010] The output module includes a DC output unit and an AC output unit, both of which are used to output current to the undervoltage component;

[0011] The conversion module is connected in series between the protection module and the AC output unit of the output module, and is used to convert DC power into AC power and then output it through the AC output unit;

[0012] The first switch is used to control the working state of the conversion module according to user needs;

[0013] The detection module is connected between the power module and the protection module, and is used for collecting detection signals and generating corresponding detection information based on the detection signals.

[0014] Preferably, the portable maintenance instrument for undervoltage components further comprises a DC input unit for connecting to an external DC power supply and transmitting the DC power provided by the external DC power supply to the protection module.

[0015] Preferably, the portable maintenance device for undervoltage components further comprises a display screen, which is communicatively connected to the detection module and electrically connected to the protection module, and is used for displaying the detection information generated by the detection module.

[0016] Preferably, the portable maintenance instrument for undervoltage components also includes a lighting module and a second switch. The lighting module is electrically connected to the protection module and is used to provide lighting according to user needs. The second switch is a double-control switch, which is used to control the switching status of the lighting module and the display screen respectively.

[0017] Preferably, the protection module is a DC circuit breaker, whose rated current is greater than the rated current of the undervoltage component portable repair instrument as a whole and less than the rated current preset by the user, and the rated voltage of the DC circuit breaker is equal to the rated voltage of the power module.

[0018] Preferably, the DC circuit breaker includes an arc fuse and an arc extinguisher;

[0019] The arc fuse is used to control the formation of the arc and limit the energy of the arc;

[0020] The arc extinguisher is used to disconnect the power module and the conversion module when the arc loses energy.

[0021] Preferably, the arc fuse comprises a plurality of groups of arc plates or curved channels, and the arc plates or curved channels are made of a material having heat resistance and electrical conductivity.

[0022] Preferably, the portable maintenance instrument for undervoltage components further comprises an inverter air dissipator, which is fixedly connected to the outside of the inverter and is used to dissipate heat for the inverter.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model can provide direct current or alternating current supply to the undervoltage component according to actual needs by setting a power module, a protection module, an output module, a conversion module, a first switch, and a detection module, so that its use method is more flexible, and it can also receive a detection signal and generate detection result information based on the detection signal. This method can not only solve the problem of large disassembly volume of the undervoltage component, reduce the labor intensity and workload of maintenance personnel, and improve the maintenance efficiency of the undervoltage component, but also solve the problem of power supply of long wires, reduce the risk of electric shock for operators, and can be applied to places with complex terrain and high installation heights, reduce the difficulty of maintenance, and improve the power generation efficiency of photovoltaic power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure of another embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of another embodiment of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Example:

[0031] See also Figure 1 , the utility model provides a technical solution:

[0032] A portable repair instrument for undervoltage components, suitable for undervoltage components and welding equipment for repairing undervoltage components, characterized in that it includes: a power module, a protection module, an output module, a conversion module, a first switch, and a detection module;

[0033] The power module is electrically connected to the protection module and is used to provide direct current, and then send the direct current to the output module through the protection module.

[0034] In this embodiment, the power module is configured as a battery, including but not limited to a 12V rechargeable battery, for providing a low-voltage DC power supply. During use, in order to meet the small volume requirement of the portable repair instrument for undervoltage components, the battery can shorten the distance between the corresponding electrolyte and the electrode and reduce the internal resistance to ensure higher performance.

[0035] In addition, the battery includes an organic liquid electrolyte or solid electrolyte containing lithium salt, and an additive is added to the organic liquid electrolyte or solid electrolyte to improve the performance of the organic electrolyte or solid electrolyte. For example, by adding additives to improve the stability and high temperature resistance of the organic electrolyte or solid electrolyte, it is helpful to reduce the aging rate of the battery under high temperature conditions.

[0036] In this embodiment, the electrodes of the battery are made of carbon material or conductive polymer, and a conductive agent is added to the carbon material or conductive polymer. By using carbon material or conductive polymer as the electrode material, it is helpful to reduce the impedance of the electrode material itself to the current. In addition, the surface area of ​​the electrode of the battery in this embodiment is larger than the preset area, which is the area of ​​the corresponding electrode of the commonly used rechargeable battery. By increasing the surface area of ​​the electrode and increasing the pores of the electrode, the effective contact area between the electrode and the electrolyte is increased, the resistance is reduced, and the charge transfer speed is increased. The organic liquid electrolyte or solid electrolyte is infiltrated into the pores of the electrode to improve the diffusivity of the electrolyte in the electrode, which further helps to reduce the internal resistance of the electrolyte in the battery.

[0037] In another embodiment, a conductive agent is added to the battery electrode. For example, the electrode is a carbon material or a conductive polymer. By adding graphite, carbon nanotubes, etc. to the carbon material or the conductive polymer, it helps to improve the conductivity of the electrode and improve the electron and ion transmission between the electrode and the electrolyte.

[0038] The protection module is electrically connected to the output module, and is used to limit the direct current provided by the power module. When the limit is exceeded, the circuit is disconnected to play a protective role. The protection module is a DC circuit breaker, and its rated current is greater than the rated current of the entire undervoltage component portable repair instrument, and less than the rated current preset by the user. Such a design takes into account the current demand of the undervoltage component portable repair instrument during normal operation, and also in order to cope with abnormal situations, such as current fluctuations or increased demand when the undervoltage component portable repair instrument is working. The rated voltage of the DC circuit breaker is equal to the rated voltage of the power module, which ensures the applicability of the DC circuit breaker in the entire undervoltage component portable repair instrument. When the undervoltage component portable repair instrument needs to cut off the connection with the battery, the existence of the DC circuit breaker can quickly cut off the circuit to prevent potential dangers, such as overload or short circuit, and improve the safety of the entire undervoltage component portable repair instrument. The design of the DC circuit breaker also takes into account possible electrical faults. Its rated current is greater than the rated current of the undervoltage component portable repair instrument, so that it can cope with instantaneous current shocks, ensuring that the undervoltage component portable repair instrument can reliably cut off the circuit in abnormal situations to prevent equipment damage.

[0039] The introduction of DC circuit breakers has made the portable maintenance instrument for undervoltage components more controllable. Operators can manually or automatically trigger the DC circuit breaker when needed to achieve flexible control of the battery.

[0040] The DC circuit breaker includes an arc fuse and an arc extinguisher. The arc fuse is used to control the formation of the arc and limit the energy of the arc. The arc extinguisher is used to disconnect the power module and the conversion module when the arc loses energy. The arc fuse includes a plurality of arc plates or curved channels, and the arc plates or curved channels are made of heat-resistant and conductive materials. Since the discharge phenomenon caused by air jumping during the circuit disconnection process may damage the equipment, the arc fuse can prevent the arc from forming to reduce its harm.

[0041] In this embodiment, the arc fuse further includes a sensor, a control unit, a trigger mechanism and a fuse element, wherein the sensor is used to detect the existence of an arc, and may be a current sensor, a voltage sensor or a sensor that uses other methods to sense arc formation.

[0042] The control unit includes a microprocessor or similar control logic for receiving the signal from the sensor and determining whether to trigger the fuse based on the predetermined arc characteristics.

[0043] The trigger mechanism includes but is not limited to electromagnetic trigger, mechanical trigger or other mechanism, which is used for the control unit to determine that the arc needs to be cut off, to be activated and to guide the fusing process of the arc.

[0044] The fuse element includes but is not limited to a fuse, a switch device or other specially designed elements, which are used to quickly open the circuit and cut off the arc in the arc fuse.

[0045] The arc extinguisher includes an energy sensor, control logic and a cutting mechanism; wherein the energy sensor is used to detect whether the arc has lost energy; the control logic is used to receive signals from the energy sensor to determine whether the circuit connection needs to be cut off when the arc loses energy; the cutting mechanism includes but is not limited to an electromagnetic relay, an electronic first switch or other specially designed cutting devices, which are used to quickly and reliably cut off the connection of the battery.

[0046] In summary, the coordinated work between the arc extinguisher and the arc fuse is intended to ensure that the arc does not cause serious impact on the portable maintenance instrument of the undervoltage component and related equipment, and at the same time quickly cut off the connection of the battery after the arc event ends to maintain the safety of the system.

[0047] The output module includes a DC output unit and an AC output unit, both of which are used to output current to the undervoltage component.

[0048] The conversion module is an inverter, which is connected in series between the protection module and the AC output unit of the output module, and is used to convert DC power into AC power and then output it through the AC output unit. An inverter air dissipator is also installed on the outside of the inverter, and the inverter air dissipator is connected to the inverter to dissipate heat for the inverter.

[0049] The first switch is used to control the working state of the conversion module according to user needs, that is, to control the start and stop of the inverter. When the portable maintenance instrument for undervoltage components needs to output AC power, the first switch is turned on to control the inverter to be connected to the DC circuit breaker. When the portable maintenance instrument for undervoltage components needs to output DC power, the first switch is turned off to control the inverter to be disconnected from the DC circuit breaker.

[0050] The detection module is connected between the power module and the protection module, and is used to collect detection signals and generate corresponding detection information based on the detection signals. The detection module has a data processing function, including a chip, a DSP and other modules with data processing functions, and a detection algorithm is built into the corresponding data processing function module, which can obtain detection result information based on the received current or voltage detection signal. In addition, based on the detection result information, a maintenance instruction for the undervoltage component can be generated to prompt the user.

[0051] In summary, the portable maintenance instrument for undervoltage components provided in this embodiment is connected by a battery and a DC circuit breaker to provide DC power. When the first switch is closed, the DC power is transmitted to the DC output unit, and the DC power is directly output to the undervoltage component to be detected; the inverter is connected to the DC circuit breaker through the first switch, and is used to convert the DC power into AC power when the first switch is turned on, and output it to the undervoltage component to be detected through the AC output unit; the detection module is connected between the battery and the DC circuit breaker, and is used to receive the detection signal and generate the detection result information based on the detection signal. It can solve the problem of large disassembly volume of undervoltage components, reduce the labor intensity and workload of maintenance personnel, improve the maintenance efficiency of undervoltage components, and solve the problem of power supply with long wires, reduce the risk of electric shock for operators, and can be applied to places with complex terrain and high installation heights, reduce the difficulty of maintenance, and improve the power generation efficiency of photovoltaic power stations.

[0052] Example 2

[0053] See also Figure 2 Compared with Example 1, the portable repair instrument for undervoltage components in this embodiment also includes a DC input unit, which is connected to a DC circuit breaker and is used to input external DC power to the DC circuit breaker so that the DC circuit breaker can convert the DC power into AC power output through an inverter. In this embodiment, the DC output unit and the DC input unit are set to the same terminal to reduce the overall volume of the portable repair instrument for undervoltage components to facilitate users to carry it. It should be understood that the DC output unit and the DC input unit can use different terminals to make a more strict distinction between the effects and avoid misunderstandings by users during use, and can be flexibly designed according to actual conditions.

[0054] Example 3

[0055] See also Figure 3 Compared with the first and second embodiments, the portable maintenance device for undervoltage components in the present embodiment further includes a display screen, which is communicatively connected to the detection module and electrically connected to the protection module, and is used to display the detection information generated by the detection module. The display screen can also display the voltage and stored power of the battery, so as to prompt the user to input direct current through the direct current input unit for charging when the battery power is low.

[0056] In addition, the portable maintenance device for undervoltage components also includes a lighting module and a second switch. The lighting module is electrically connected to the protection module and is used to provide lighting according to user needs. The second switch is a double-control switch, which is used to control the switching status of the lighting module and the display screen respectively.

[0057] In summary, the portable maintenance instrument for undervoltage components provided by the embodiment of the present application can be used in specific use by connecting the battery and the DC circuit breaker to output direct current to the undervoltage component to be detected; or after the battery is connected to the DC circuit breaker, the first switch is turned on to turn on the inverter to output alternating current, and the alternating current is output to the undervoltage component to be detected; or when the battery is insufficient and alternating current needs to be output, the DC circuit breaker cuts off the connection of the battery, and the external power supply directly inputs direct current to the DC circuit breaker, and then the first switch turns on the inverter to output the corresponding alternating current. It provides a flexible power supply method to meet more application scenarios and improve the detection efficiency of undervoltage components. It has the effect of improving the maintenance efficiency of undervoltage components, improving power generation efficiency, and reducing the labor intensity of operators. At the same time, due to its small operating range, it not only improves the safety of operators, but also makes it more convenient to carry, further improving the maintenance efficiency of undervoltage components.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A portable maintenance instrument for undervoltage components, suitable for undervoltage components, characterized in that: include: Power module, protection module, output module, conversion module, first switch, detection module; The power module is electrically connected to the protection module, and is used to provide direct current, and send it to the output module after passing through the protection module; The protection module is electrically connected to the output module and is used to limit the direct current provided by the power module and disconnect the circuit to protect the power module when the limit is exceeded. The output module includes a DC output unit and an AC output unit, both of which are used to output current to the undervoltage component; The conversion module is connected in series between the protection module and the AC output unit of the output module, and is used to convert DC power into AC power and then output it through the AC output unit; The first switch is used to control the working state of the conversion module according to user needs; The detection module is connected between the power module and the protection module, and is used for collecting detection signals and generating corresponding detection information based on the detection signals.

2. The portable maintenance instrument for undervoltage components according to claim 1, characterized in that: The portable maintenance instrument for undervoltage components also includes a DC input unit, which is used to connect an external DC power supply and transmit the DC power provided by the external DC power supply to the protection module.

3. The portable maintenance instrument for undervoltage components according to claim 1, characterized in that: The portable maintenance instrument for undervoltage components also includes a display screen, which is communicatively connected to the detection module and electrically connected to the protection module, and is used to display the detection information generated by the detection module.

4. The portable maintenance instrument for undervoltage components according to claim 3, characterized in that: The portable maintenance instrument for undervoltage components also includes a lighting module and a second switch. The lighting module is electrically connected to the protection module and is used to provide lighting according to user needs. The second switch is a double-control switch, which is used to control the switch status of the lighting module and the display screen respectively.

5. The portable maintenance instrument for undervoltage components according to claim 1, characterized in that: The protection module is a DC circuit breaker, whose rated current is greater than the rated current of the undervoltage component portable repair instrument as a whole and less than the rated current preset by the user, and the rated voltage of the DC circuit breaker is equal to the rated voltage of the power module.

6. The portable maintenance instrument for undervoltage components according to claim 5, characterized in that: The DC circuit breaker includes an arc fuse and an arc extinguisher; The arc fuse is used to control the formation of the arc and limit the energy of the arc; The arc extinguisher is used to disconnect the power module and the conversion module when the arc loses energy.

7. The portable maintenance instrument for undervoltage components according to claim 6, characterized in that: The arc fuse comprises a plurality of groups of arc plates or curved channels, and the arc plates or curved channels are made of a material with heat resistance and electrical conductivity.

8. The portable maintenance instrument for undervoltage components according to claim 1, characterized in that: The portable maintenance instrument for undervoltage components also includes an inverter air dissipator, which is fixedly connected to the outside of the inverter and is used to dissipate heat for the inverter.

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