CN217406513U - Photovoltaic module rapid turn-off device comprising single-wire box embedded junction box - Google Patents
Photovoltaic module rapid turn-off device comprising single-wire box embedded junction box Download PDFInfo
- Publication number
- CN217406513U CN217406513U CN202221212400.5U CN202221212400U CN217406513U CN 217406513 U CN217406513 U CN 217406513U CN 202221212400 U CN202221212400 U CN 202221212400U CN 217406513 U CN217406513 U CN 217406513U
- Authority
- CN
- China
- Prior art keywords
- switch
- unit
- resistor
- mos
- photovoltaic module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model relates to a new forms of energy technical field, concretely relates to quick turn-off device of photovoltaic module who contains embedded terminal box of single line box, including voltage sampling unit, MOS switch N1, MOS switch N2, the fast switch unit, logic controller U1, energy storage unit and inductance L, fast switch unit control end is connected with logic controller U1, the output of fast switch unit is connected with MOS switch N1 and MOS switch N2's grid respectively, MOS switch N1's drain electrode and photovoltaic module substring negative pole connecting wire, MOS switch N2's source electrode and photovoltaic module positive pole connecting wire are connected, MOS switch N1's source electrode and MOS switch N2's drain electrode are connected with inductance L first end, inductance L second end is as the negative pole output. The utility model has the advantages of: the MOS tube switch is used for replacing a diode, so that the safety is ensured; an external wire box is not needed, the construction steps are reduced, and the cost is reduced.
Description
Technical Field
The utility model relates to a new forms of energy technical field, concretely relates to photovoltaic module turn-off device fast who contains embedded terminal box of single line box.
Background
Due to the renewable and clean nature of solar energy, photovoltaic grid-connected power generation technology is rapidly developed. At present, a plurality of photovoltaic modules are connected in series to form a photovoltaic group string, and the photovoltaic group string is converted into alternating current by an inverter and then is transmitted to a power grid. The direct-current voltage formed by the photovoltaic module arrays connected in series is very high, and a great potential safety hazard exists, so that the photovoltaic modules are required to be quickly turned off by self in order to improve the safety of a photovoltaic system. In the prior art, a quick breaker is added behind each photovoltaic module, and the voltage on a direct current cable can meet the safety requirements through the breaker.
The existing scheme adopts an integrated junction box, namely a shutoff device is added behind each photovoltaic panel, as shown in fig. 1, so that the scheme of the overall monitoring shutoff system is completed. However, it has the following disadvantages: the cable, the junction box shell and the corresponding connecting terminal are newly added, so that the whole BOS cost of the project is increased, and the project yield is reduced; the newly added switch-off box can multiply the connection position of the system, and the system risk probability such as direct current arc discharge and the like caused by the failure rate of the connector is increased; the external line box increases the working procedures and difficulty of a construction site and increases the working hours. For this reason it is necessary to develop new shut-off devices to reduce the production and installation costs of the plant.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: at present, the technical problems that the production and installation cost of the photovoltaic system shutdown evidence storage equipment is high, the arc discharge potential safety hazard exists and integration is difficult are solved. The photovoltaic module rapid turn-off device comprises a single-wire box embedded junction box, and a turn-off circuit directly attached to a photovoltaic panel replaces a diode, so that the trouble of connecting a turn-off device on a cable is eliminated, and the cost is reduced.
Solve the technical problem, the utility model discloses a following technical scheme: a photovoltaic module quick turn-off device comprising a single-wire box embedded junction box comprises a voltage sampling unit, an MOS switch N1, an MOS switch N2, a quick switch unit, a logic controller U1, an energy storage unit and an inductor L, wherein the voltage sampling unit is connected with the positive pole and the negative pole of a photovoltaic module sub-string and used for detecting the voltage between the positive pole and the negative pole of the photovoltaic module sub-string, the voltage sampling unit is connected with the logic controller U1, the control end of the quick switch unit is connected with the logic controller U1, the quick switch unit is provided with two output ends, the output ends of the quick switch unit are respectively connected with the grids of an MOS switch N1 and an MOS switch N2, the drain electrode of the MOS switch N1 is connected with the negative pole of the photovoltaic module sub-string, the source electrode of the MOS switch N2 is connected with the positive pole connecting wire of the photovoltaic module sub-string, and the source electrode of the MOS switch N1 is connected with the drain electrode of the MOS switch N2 and the first end of the inductor L, and the second end of the inductor L is used as the output end of the negative connecting wire of the photovoltaic module substring, and the energy storage unit supplies power for the electronic components.
Preferably, the voltage sampling unit comprises a filter capacitor C, a divider resistor R1 and a divider resistor R2, the first end of the divider resistor R1 is connected with the positive connecting wire of the sub-string of the photovoltaic module, the second end of the divider resistor R2 is connected with the negative connecting wire of the sub-string of the photovoltaic module, the second end of the divider resistor R1 and the first end of the divider resistor R2 are both connected with the first end of the filter capacitor C, the second end of the filter capacitor C is connected with the negative connecting wire of the sub-string of the photovoltaic module, and the first end of the filter capacitor C is connected with a logic controller U1.
Preferably, the voltage dividing resistor R1 is a pull-up resistor having a resistance larger than that of the voltage dividing resistor R2.
Preferably, the fast switch unit includes two sets of switch circuits, the switch circuits include a resistor R4, a resistor R5, a resistor R6 and a MOS transistor Q1, a first end of the resistor R4 is connected to an I/O pin of the logic controller U1, a second end of the resistor R4 is grounded via a resistor R2, and is connected to a negative electrode of the energy storage module to represent ground, a source of the MOS transistor Q1 is grounded, a second end of the resistor R4 is connected to a gate of the MOS transistor Q1, a drain of the MOS transistor Q1 is connected to a positive electrode of the energy storage module via the resistor R6, a drain of the MOS transistor Q1 is used as an output end of the fast switch unit, and drains of the MOS transistors Q1 of the two sets of switch circuits are connected to gates of the MOS switch N1 and the MOS switch N2, respectively.
Preferably, the intelligent terminal further comprises a communication unit, wherein the communication unit is connected with the logic controller U1, and the communication unit is in wireless communication connection with the Internet.
Preferably, the communication unit comprises a PLC carrier communication unit and/or an HPLC carrier communication unit.
Preferably, the solar photovoltaic module sub-string protection device further comprises a decoupling capacitor C1, and the decoupling capacitor C1 is installed between the positive pole of the photovoltaic module sub-string and the negative pole of the photovoltaic module sub-string.
Preferably, the energy storage unit is a high-temperature-resistant battery or a super capacitor.
Preferably, the controller further comprises a storage unit, the storage unit is connected with the logic controller U1, and the storage unit stores the action record of the quick switch unit.
Preferably, the inverter further comprises a communication interface, the communication interface is connected with the logic controller U1, and the communication interface is connected with the inverter through a communication cable.
The utility model has the advantages of:
(1) the MOS tube switch is used for replacing a diode, so that the bypass function when the shadow is shielded is realized, meanwhile, the effect that the diode cannot influence and cannot be switched off when the diode is switched off is ensured, and the safety is ensured;
(2) the circuit is used for replacing a middle wire box of the three-split wire box, the turn-off function is realized, an external wire box is not needed, the construction steps are reduced, the cost is reduced, and the yield of the power station is increased;
(3) compared with a shut-off device, the system connection position can be increased in multiples, the fault rate of the connector is increased, and system risks such as direct current arc discharge and the like are caused, the technology of the utility model reduces the connection position and reduces the system risks;
(4) an energy storage circuit is added, so that the instability of the safety function shutdown caused by the instability of the output of the component is reduced;
(5) and a separate shutoff device is eliminated, so that the shutoff device can be integrated in the photovoltaic panel, and the integration level of the system is increased.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
Drawings
The invention will be further explained with reference to the drawings:
fig. 1 is a schematic connection diagram of a conventional shutdown device.
Fig. 2 is a schematic diagram of string connections of photovoltaic modules in the prior art.
FIG. 3 is a schematic diagram of an exemplary turn-off circuit.
Fig. 4 is a schematic circuit diagram of a voltage sampling unit according to an embodiment.
Fig. 5 is a schematic circuit diagram of the fast switch unit according to the embodiment.
Wherein: 1. the photovoltaic module comprises a negative electrode connecting box, 2, a positive electrode junction box, 3, a photovoltaic panel, 4, a shutoff device, 5, an inverter, 6, a substring positive electrode connecting wire, 7, a diode, 8, a substring negative electrode connecting wire, 9, a photovoltaic module substring, 10, an energy storage unit, 11, a voltage sampling unit, 12, a quick switching unit, 13 and a communication unit.
Detailed Description
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
In the following description, the appearances of the indicating orientation or positional relationship, such as the terms "inner", "outer", "upper", "lower", "left", "right", etc., are only for convenience in describing the embodiments and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
In the prior art, three split type junction boxes are used for completing connection between the photovoltaic panels 3, and the junction boxes comprise a negative junction box 1, a middle shaft junction box and a positive junction box 2, wherein the positive junction box 2 of the positive connecting wire of each photovoltaic panel 3 is connected, the negative junction box 1 of the negative connecting wire is connected, and the positive junction box 2 and the negative junction box 1 are connected with the middle shaft junction box. The junction box of the middle shaft has two output ends, and the two output ends can be used for being connected with other photovoltaic panels 3, please refer to fig. 1. Referring to fig. 2, the photovoltaic panel 3 includes a plurality of strings of photovoltaic modules, which are connected in series. The substring anode connecting wire 6 is connected with the next substring cathode connecting wire 8, and substrings at two ends respectively provide an anode terminal and a cathode terminal. The anode and cathode of a single string are close to each other, a diode 7 is connected between the anode and cathode, and the diode 7 is in a cut-off state. In the prior art, a shutdown device 4 is connected between every two photovoltaic panels 3, and the shutdown device 4 is also required to be installed at two joints of an inverter 5, so as to ensure the safety of a photovoltaic system. The junction box of the breaker 4 needs to be connected for many times on the installation site of the photovoltaic system, and construction time is increased.
Example (b):
a photovoltaic module fast turn-off device containing a single-wire box embedded junction box is disclosed, please refer to figure 3, and comprises a voltage sampling unit 11, an MOS switch N1, an MOS switch N2, a fast switch unit 12, a logic controller U1, a communication unit 13, an energy storage unit 10 and an inductor L, wherein the voltage sampling unit 11 is connected with the positive pole and the negative pole of a photovoltaic module sub-string 9 for detecting the voltage between the positive pole and the negative pole of the photovoltaic module sub-string 9, the voltage sampling unit 11 is connected with the logic controller U1, the control end of the fast switch unit 12 is connected with the logic controller U1, the fast switch unit 12 is provided with two output ends, the output end of the fast switch unit 12 is respectively connected with the grids of an MOS switch N1 and an MOS switch N2, the drain of the MOS switch N1 is connected with the negative pole connecting wire 8 of the photovoltaic module sub-string 9, the source of the MOS switch N2 is connected with the positive pole connecting wire 6 of the photovoltaic module sub-string 9, the source of the MOS switch N1 is connected with the drain of the MOS switch N2 and the first end of the inductor L, the second end of the inductor L is used as the output end of a negative connecting wire 8 of the photovoltaic module sub-string 9, the energy storage unit 10 supplies power for the electronic components, and the energy storage unit 10 is a high-temperature-resistant battery or a super capacitor, so that short-time power supply is guaranteed when the voltage of the sub-string cannot maintain the normal work of the circuit. The communication unit 13 is connected to the logic controller U1, and the communication unit 13 establishes a wireless communication connection with the internet. The communication unit 13 is a communication section for controlling the quick-acting switch-off 4, for receiving a switch-off command. The communication unit comprises PLC carrier communication or HPLC carrier communication. When the current demand of the rear-stage component is increased instantly, the power supply caused by the sudden change of the current is unstable, and the characteristic of the inductor L determines that the current flowing through the inductor can not be suddenly changed, so that the influence on the stability of the power supply of the whole system is well protected.
The embodiment is also provided with a storage unit and a communication interface, wherein the storage unit is connected with the logic controller U1, and the storage unit stores the action record of the quick switch unit. The communication interface is connected with the logic controller U1, and the communication interface is connected with the inverter through a communication cable. The inverter and the logic controller U1 establish communication connection through a communication interface to realize information intercommunication.
Referring to fig. 4, the voltage sampling unit 11 includes a filter capacitor C, a voltage divider resistor R1 and a voltage divider resistor R2, wherein a first end of the voltage divider resistor R1 is connected to the positive connection line 6 of the photovoltaic module sub string 9, a second end of the voltage divider resistor R2 is connected to the negative connection line 8 of the photovoltaic module sub string 9, the second end of the voltage divider resistor R1 and a first end of the voltage divider resistor R2 are both connected to the first end of the filter capacitor C, the second end of the filter capacitor C is connected to the negative connection line 8 of the photovoltaic module sub string 9, and the first end of the filter capacitor C is connected to the logic controller U1. The voltage dividing resistor R1 is a pull-up resistor with a resistance value larger than that of the voltage dividing resistor R2, and the resistor R2 is a pull-down resistor. The voltage dividing resistors R1 and R2 have to use high precision, otherwise, the voltage deviation after sampling is large, the voltage obtained by dividing the voltage of an input power VIN + connected to the positive connecting wire 6 of the photovoltaic module sub-string 9 through the voltage dividing resistors R1 and R2 is filtered through the filter capacitor C, so that the voltage fluctuation is small, and then the voltage is transmitted to a pin of the logic control processor U1, and the logic control processor U1 is a processor with analog-to-digital conversion.
The decoupling capacitor C1 is used as an input decoupling capacitor of the module power supply and is placed between the positive pole of the photovoltaic module substring 9 and the negative pole of the photovoltaic module substring 9, so that the current fluctuation formed in the power supply circuit when the current of the input and output circuit is changed is prevented from influencing the normal work of the circuit, and meanwhile, the interference caused by power supply noise can be solved.
Referring to fig. 5, the fast switch unit 12 includes two sets of switch circuits, each switch circuit includes a resistor R4, a resistor R5, a resistor R6, and a MOS transistor Q1, a first end of the resistor R4 is connected to an I/O pin of the logic controller U1, a second end of the resistor R4 is grounded via a resistor R2, and is connected to a negative electrode of the energy storage module to represent ground, a source of the MOS transistor Q1 is grounded, a second end of the resistor R4 is connected to a gate of the MOS transistor Q1, a drain of the MOS transistor Q1 is connected to a positive electrode of the energy storage module via the resistor R6, a drain of the MOS transistor Q1 is used as an output end of the fast switch unit 12, and drains of the MOS transistors Q1 of the two sets of switch circuits are connected to gates of the MOS switch N1 and the MOS switch N2, respectively. When the product is operating normally, the fast switching unit 12 closes the MOS switch N1, opens the MOS switch N2, and the power supply forms an open path from VIN + to VIN-and a power supply output path from VOUT + to VOUT-. When the power output needs to be cut off, the fast switching unit 12 turns off the MOS switch N1 and the MOS switch N2, and at this time, the path from VIN + to VIN-is disconnected, and at the same time, the path from VOUT + to VOUT-is also disconnected, and the output cannot be output to the subsequent stage. When shadow masking occurs, MOS switch N2 is closed, bypassing it. The principle diagram of the rapid turn-off unit is shown in fig. 5, the rapid turn-off unit is composed of resistors R4, R5, R6 and an MOS tube Q1, the resistor R4 is connected to a GPIO port of a logic controller U1, when GPIO is high level, an MOS tube Q1 is connected, at the moment, a low level signal is supplied to an MOS switch N1 or N2, the MOS switch is turned off, when GPIO is low level, the MOS tube Q1 is turned off, at the moment, the level supplied to the MOS switch N1 or N2 is high level, the MOS switch is connected, and as the switching speed of the MOS switch is very high, the rapid switching function can be realized through the circuit.
The beneficial technical effects of this embodiment do: the diode 7 is replaced by the MOS tube switch, so that the bypass function when the shadow is shielded is realized, meanwhile, the situation that the diode 7 cannot be influenced to shut down when the diode is shut down is ensured, and the safety is ensured; the circuit replaces the middle wire box of the three-split wire box, the turn-off function is realized, an external wire box is not needed, the construction steps are reduced, and the cost is reduced; and an energy storage circuit is added, so that the instability of the safety function shutdown caused by the instability of the output of the component is reduced.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. A photovoltaic module rapid turn-off device containing a single-wire box embedded junction box is characterized in that,
the photovoltaic power generation device comprises a voltage sampling unit, an MOS switch N1, an MOS switch N2, a quick switch unit, a logic controller U1, an energy storage unit and an inductor L, wherein the voltage sampling unit is connected with the positive pole and the negative pole of a photovoltaic component sub string to detect the voltage between the positive pole and the negative pole of the photovoltaic component sub string, the voltage sampling unit is connected with the logic controller U1, the control end of the quick switch unit is connected with the logic controller U1, the quick switch unit is provided with two output ends, the output ends of the quick switch unit are respectively connected with the grid electrodes of an MOS switch N1 and an MOS switch N2, the drain electrode of the MOS switch N1 is connected with the negative pole of the photovoltaic component, the source electrode of the MOS switch N2 is connected with the positive pole of the photovoltaic component sub string, the source electrode of the MOS switch N1 is connected with the first end of the drain electrode of the MOS switch N2, and the second end of the inductor L is used as the output end of the negative pole of the photovoltaic component sub string, the energy storage unit supplies power to the electronic components.
2. The device for rapidly shutting down a photovoltaic module including a single-wire box embedded junction box according to claim 1,
the voltage sampling unit includes filter capacitor C, divider resistance R1 and divider resistance R2, the first end of divider resistance R1 is connected with photovoltaic module substring positive connecting wire, and divider resistance R2 second end is connected with photovoltaic module substring negative connecting wire, divider resistance R1 second end and divider resistance R2 first end all with filter capacitor C first end is connected, filter capacitor C second end is connected with photovoltaic module substring negative connecting wire, filter capacitor C first end is connected with logic controller U1.
3. The device for rapidly shutting down a photovoltaic module including a single-wire box embedded junction box according to claim 2,
the voltage dividing resistor R1 is a pull-up resistor, and the resistance value of the voltage dividing resistor R2 is larger than that of the voltage dividing resistor R1.
4. A rapid turn-off device of photovoltaic modules comprising a single wire box embedded junction box according to any one of claims 1 to 3,
the fast switch unit comprises two groups of switch circuits, each switch circuit comprises a resistor R4, a resistor R5, a resistor R6 and an MOS transistor Q1, the first end of the resistor R4 is connected with an I/O pin of a logic controller U1, the second end of the resistor R4 is grounded through a resistor R2, the second end of the resistor R4 is connected with the negative electrode of the energy storage module and is grounded, the source electrode of the MOS transistor Q1 is grounded, the second end of the resistor R4 is connected with the grid electrode of the MOS transistor Q1, the drain electrode of the MOS transistor Q1 is connected with the positive electrode of the energy storage module through the resistor R6, the drain electrode of the MOS transistor Q1 serves as the output end of the fast switch unit, and the drain electrodes of the MOS transistors Q1 of the two groups of switch circuits are respectively connected with the grid electrodes of an MOS switch N1 and an MOS switch N2.
5. A rapid turn-off device of photovoltaic modules comprising a single wire box embedded junction box according to any one of claims 1 to 3,
the intelligent control system further comprises a communication unit, wherein the communication unit is connected with the logic controller U1, and the communication unit is connected with the Internet in a wireless communication mode.
6. The device for rapidly shutting down a photovoltaic module including a single-wire box embedded junction box according to claim 5,
the communication unit comprises a PLC carrier communication unit and/or an HPLC carrier communication unit.
7. A rapid turn-off device of photovoltaic modules comprising a single wire box embedded junction box according to any one of claims 1 to 3,
the photovoltaic module sub-string decoupling device further comprises a decoupling capacitor C1, and the decoupling capacitor C1 is installed between the positive pole of the photovoltaic module sub-string and the negative pole of the photovoltaic module sub-string.
8. A rapid turn-off device of photovoltaic modules comprising a single wire box embedded junction box according to any one of claims 1 to 3,
the energy storage unit is a high-temperature-resistant battery or a super capacitor.
9. A rapid turn-off device of photovoltaic modules comprising a single wire box embedded junction box according to any one of claims 1 to 3,
the intelligent control device further comprises a storage unit, wherein the storage unit is connected with the logic controller U1, and the storage unit stores the action record of the quick switch unit.
10. A rapid turn-off device of photovoltaic modules comprising a single wire box embedded junction box according to any one of claims 1 to 3,
the inverter further comprises a communication interface, wherein the communication interface is connected with the logic controller U1, and the communication interface is connected with the inverter through a communication cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221212400.5U CN217406513U (en) | 2022-05-20 | 2022-05-20 | Photovoltaic module rapid turn-off device comprising single-wire box embedded junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221212400.5U CN217406513U (en) | 2022-05-20 | 2022-05-20 | Photovoltaic module rapid turn-off device comprising single-wire box embedded junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217406513U true CN217406513U (en) | 2022-09-09 |
Family
ID=83144874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221212400.5U Active CN217406513U (en) | 2022-05-20 | 2022-05-20 | Photovoltaic module rapid turn-off device comprising single-wire box embedded junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217406513U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115764817A (en) * | 2023-01-06 | 2023-03-07 | 上海劭能新能源科技有限公司 | Quick shutoff device supporting two-way photovoltaic module input and having monitoring function |
-
2022
- 2022-05-20 CN CN202221212400.5U patent/CN217406513U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115764817A (en) * | 2023-01-06 | 2023-03-07 | 上海劭能新能源科技有限公司 | Quick shutoff device supporting two-way photovoltaic module input and having monitoring function |
| CN115764817B (en) * | 2023-01-06 | 2023-06-23 | 上海劭能新能源科技有限公司 | Quick turn-off device supporting two paths of photovoltaic module input and having monitoring function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106817075B (en) | A kind of photovoltaic junction box and photovoltaic system | |
| CN203481783U (en) | Short circuit and overcurrent protection circuit and mass production test equipment | |
| WO2021233318A1 (en) | Passive cms equalization circuit and method based on super-capacitor | |
| CN217406513U (en) | Photovoltaic module rapid turn-off device comprising single-wire box embedded junction box | |
| US20210351741A1 (en) | Safety Switch for Photovoltaic Systems | |
| US20230046346A1 (en) | Power System | |
| CN105245104A (en) | Intelligent photovoltaic power adjustor and adjusting method | |
| CN202206111U (en) | Over-current protection device for boost discharge adjusting unit | |
| CN102570525A (en) | PSoC (Programmable System on Chip)-based MPPT (Maximum Power Point Tracking) type solar charge controller | |
| CN104660038A (en) | Intelligent solar photovoltaic module circuit and control/protection method thereof | |
| CN205389123U (en) | Current foldback circuit of battery | |
| CN217522635U (en) | Distributed photovoltaic power station monitoring equipment with acquisition module | |
| CN201204725Y (en) | Intelligent switch controller for solar street lamp | |
| CN110417388A (en) | A kind of photovoltaic module switching off device and photovoltaic power generation safety system | |
| CN109245711B (en) | Photovoltaic system safety protection equipment | |
| US20220200290A1 (en) | Power System | |
| CN114024291B (en) | Multi-control assembly level quick shutoff device | |
| CN115764817A (en) | Quick shutoff device supporting two-way photovoltaic module input and having monitoring function | |
| CN112821353B (en) | Photovoltaic module turn-off device and method for resuming access after photovoltaic module turn-off | |
| CN114421884A (en) | Photovoltaic solar module and switching method thereof | |
| CN105429587A (en) | Cascade power optimizer of solar power station | |
| CN112165076A (en) | Lithium battery secondary overvoltage overcharge-prevention protection system and control method | |
| WO2020177204A1 (en) | Power generation device and system capable of maximum power tracking | |
| CN205051579U (en) | Intelligence photovoltaic frequency control ware | |
| CN204392083U (en) | A kind of intelligent solar photovoltaic module circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |