CN216956800U - Low-cost split type photovoltaic module efficiency management intelligent optimization ware - Google Patents
Low-cost split type photovoltaic module efficiency management intelligent optimization ware Download PDFInfo
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- CN216956800U CN216956800U CN202220712816.7U CN202220712816U CN216956800U CN 216956800 U CN216956800 U CN 216956800U CN 202220712816 U CN202220712816 U CN 202220712816U CN 216956800 U CN216956800 U CN 216956800U
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- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 238000010248 power generation Methods 0.000 abstract description 21
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- 238000010586 diagram Methods 0.000 description 10
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Abstract
The utility model provides a low-cost split type photovoltaic module efficiency management intelligent optimizer which comprises a left optimizer, a middle optimizer and a right optimizer, wherein the adjacent optimizers are connected through cables, and each optimizer comprises a box body, a control circuit board and a box cover. The control circuit board is provided with an MPPT module, a DC/DC converter, a bypass diode, a sub-string level bus bar connection area and a cable connection area. The MPPT module can realize the optimization of the sub-string level power generation efficiency, independently perform the MPPT control of the sub-string level, eliminate the problem of performance mismatch between minimum plates and improve the power generation capacity of a photovoltaic system; the conventional Schottky diode is used as a bypass element, so that the production cost is reduced on the premise of ensuring the passing of large current; the optimizers are directly connected through cables, and when the assembly is produced, the photovoltaic assembly sub-string bus bar is connected with the bus bar connecting area of the control circuit board, the existing assembly production process is not changed, and the application effect of the optimizers is improved.
Description
Technical Field
The utility model relates to the technical field of photovoltaic power generation, in particular to a low-cost split type photovoltaic module efficiency management intelligent optimizer.
Background
At present, a photovoltaic module formed by combining a plurality of solar cells is widely used for building various photovoltaic power generation systems or building curtain walls to build energy-saving and environment-friendly buildings. The photovoltaic power generation system is an assembly array formed by connecting a plurality of battery assemblies in series and parallel, and each battery assembly comprises a plurality of battery pieces connected in series. In a photovoltaic system, the parameters of each solar cell module are not completely the same, and the solar radiation conditions may be different, for example, different degrees of soiling on the surface of the module, local shadows due to various reasons, module orientation, etc., which may cause the actual power generation of each solar cell module in the photovoltaic system to be different, i.e., the actual output power of each parallel string of solar cell modules is different from the theoretical maximum output power. The actual power generation capacity of the photovoltaic system has a direct relationship with the system efficiency, theoretically, the power generation efficiency of the photovoltaic system is generally about 80%, and according to actual statistical data, even in western regions with good illumination radiation conditions, the average system efficiency of the photovoltaic system is only 74%.
To solve this problem, the most widely used at present is to use a Maximum Power Point Tracking (MPPT) circuit in a photovoltaic Power generation system. The general MPPT control circuit and the inverter are integrally installed in an inverter case, the output power of the whole photovoltaic system is adjusted through the MPPT control circuit, or the output power of each battery pack string is adjusted by connecting one MPPT control circuit for each battery pack string in the system; in the former method, as long as there is a difference between the outputs of the component strings, the strings will affect each other, the output voltage will be limited to a lower value (barrel effect), resulting in energy loss, and the larger the difference of the strings is, the greater the energy loss is; in addition, the severe inter-string variability can cause local hot spots, affecting the overall reliability of the system. In previous photovoltaic power generation systems, MPPT control circuitry may be provided in each photovoltaic module, i.e., maximum power tracking for individual modules. In order to further improve the power generation efficiency of the photovoltaic module, MPPT control may be performed on each battery string in the photovoltaic module, and thus, the effective power generation power of the whole photovoltaic power generation system may be further improved.
At present, a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is used as a bypass element to realize smaller temperature rise, and the cost of the intelligent diode is generally higher, so that the production cost of the optimizer is high. In addition, the structure and circuit design of the existing split type optimizer are carried out based on the structure of the existing split type junction box, the electrical connection between the split type junction boxes is carried out through the assembly bus bar, for the intelligent optimizer, if the assembly bus bar is adopted to realize adjacent connection, an additional connection bus bar needs to be added in the photovoltaic assembly, and the connection bus bar between the optimizers and the insulation isolation between the original connection bus bar and the connection bus bar connected by the conductive terminals of the junction box are ensured, so that the internal structure of the photovoltaic assembly needs to be changed, the existing assembly manufacturing process is further changed, a lot of manufacturing cost can be increased, and the intelligent optimizer is not beneficial to being applied to the existing conventional battery assembly.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a low-cost split type photovoltaic module efficiency management intelligent optimizer which realizes the substring-level optimization of photovoltaic modules, reduces the production cost, reduces the connection difficulty between adjacent optimizers and improves the applicability of the intelligent optimizer.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a low-cost split type photovoltaic module efficiency management intelligent optimizer comprises a left optimizer, a middle optimizer and a right optimizer, wherein adjacent optimizers are connected through cables, and each optimizer comprises a box body, a control circuit board arranged in the box body and a box cover capable of being buckled with the box body; a cable installation part and a buckle are arranged at the end part of the box body, and a channel for the cable to pass through is formed in the cable installation part and the buckle; the control circuit board is provided with an MPPT module, a DC/DC converter, a bypass diode, a sub-string level bus bar connection area and a cable connection area which are connected with the photovoltaic module battery sub-string; the sub-cascade bus bar connection region comprises a slit for a bus bar to pass through and a bus bar welding region; the DC/DC converter is electrically connected with the MPPT module to perform maximum power tracking control on the photovoltaic module battery substrings; the bypass diode is a Schottky diode and is connected with the output end of the DC/DC converter; the cable is connected with the control circuit board through the cable connecting area.
Preferably, the bypass diode is an axial diode or a patch diode.
Preferably, a plurality of positioning columns are arranged inside the box body, a plurality of positioning holes are formed in the control circuit board, and the structures of the positioning holes are matched with the structures of the positioning columns.
Still preferably, a conductor is further disposed on the control circuit board, and a cable is connected to the cable connection area through the conductor.
Still preferably, the conductor is integrally formed with the cable connection region.
Still preferably, the electrical conductor includes a first end and a second end, the first end being connected to the electrical cable connection region, and the second end being connected to the electrical cable.
Still preferably, the cable line connecting area is provided with a plurality of connecting holes, the first end of the conductor is provided with a plurality of connecting claws, and each connecting claw passes through a corresponding connecting hole.
Still preferably, the second end of the conductor is a U-shaped structure.
Still preferably, the cable installation parts are provided at both ends of the case, and the electric conductors are provided at both ends of the control circuit board.
Still preferably, the following: the left end of the left optimizer is connected with a first connector through a cable, and the right end of the right optimizer is connected with a second connector through a cable.
Compared with the prior art, the utility model has the beneficial effects that: in the low-cost split type photovoltaic module efficiency management intelligent optimizer, the MPPT module is integrated on the control panel, so that the optimization of the sub-string level power generation efficiency can be realized, the sub-string level MPPT control is independently carried out, the problem of performance mismatch between minimum plates is eliminated, and the power generation capacity of a photovoltaic system is improved; the traditional Schottky diode is used as a bypass element, so that the production cost is reduced on the premise of ensuring that the temperature rise meets the requirement; adopt cable conductor lug connection between the optimizer, in the subassembly production process, only need with photovoltaic module substring busbar and control circuit board's substring level busbar joining region be connected can, do not change current subassembly production technology, improve the applicability of optimizer.
Drawings
Fig. 1 is a schematic structural diagram of a low-cost split-type photovoltaic module efficiency management intelligent optimizer according to embodiment 1 of the present invention;
FIG. 2 is an exploded schematic diagram of a left optimizer in the low-cost split photovoltaic module efficiency management intelligent optimizer of FIG. 1;
FIG. 3 is a schematic top view of the internal structure of a left optimizer in the low-cost split photovoltaic module efficiency management intelligent optimizer of FIG. 1;
FIG. 4 is a schematic cross-sectional structural diagram of a left optimizer in the low-cost split photovoltaic module efficiency management intelligent optimizer of FIG. 1;
FIG. 5 is a schematic structural diagram of an electrical conductor in the low-cost split photovoltaic module efficiency management intelligent optimizer of FIG. 1;
FIG. 6 is a schematic structural diagram of the low-cost split-type photovoltaic module efficiency management intelligent optimizer shown in FIG. 1 applied to a photovoltaic module;
fig. 7 is an electrical connection diagram of the low-cost split photovoltaic module efficiency management intelligent optimizer of fig. 1 applied to a photovoltaic module.
In the figure, 100-intelligent optimizer, 10-left optimizer, 11-box body, 111-cable installation part, 112-buckle, 113-positioning column, 12-control circuit board, 121-sub-string level bus bar connection region, 122-cable connection region, 123-positioning hole, 124-connection hole, 13-box cover, 14-MPPT module, 15-DC/DC converter, 16-bypass diode, 17-conductor, 171-connection claw, 172-first notch, 173-second notch, 20-middle optimizer, 30-right optimizer, 40-cable, 50-first connector, 60-second connector, 200-photovoltaic module, 201-photovoltaic module sub-string bus bar.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1 to 4, a schematic structural diagram of a low-cost split-type photovoltaic module efficiency management intelligent optimizer of embodiment 1 of the present invention is shown, and a low-cost split-type photovoltaic module efficiency management intelligent optimizer 100 of the present invention includes a left optimizer 10, a middle optimizer 20, and a right optimizer 30, adjacent optimizers are connected by a cable 40, and each optimizer includes a box body, a control circuit board disposed inside the box body, and a box cover capable of being fastened to the box body. For example, the left optimizer 10 includes a box 11, a control circuit board 12 and a box cover 13, the control circuit board 12 is disposed inside the box 11, and the box cover 13 can be fastened to the box 11. In the actual manufacturing, the box body adopts the totally enclosed encapsulating mode to seal, can set up the block structure that corresponds on box body and lid, like the cooperation of draw-in groove and fixture block to set up the sealing washer, clamp the box body with the lid correspondence, promote waterproof, dustproof ability, prolong intelligent optimization ware's life.
Due to the fact that the cables 40 are used for connecting the adjacent optimizers, the structure and the existing manufacturing process of the photovoltaic module cannot be changed, the process of connecting the adjacent optimizers through bus bars is omitted, and the photovoltaic module substring bus bars are only required to be connected with the substring-level bus bar connecting area of the control circuit board, so that the production cost of the module is reduced, and the production efficiency is improved.
The internal structures of the left optimizer 10, the middle optimizer 20 and the right optimizer 30 are similar, and the left optimizer 10 is taken as an example for detailed description. Referring to fig. 2 to 4, in the left optimizer 10, the end of the box 11 is provided with a cable installation portion 111 and a buckle 112, the buckle 112 is installed below the cable installation portion 111, the structure of the buckle 112 matches with the structure of the cable installation portion 111, and a channel for the cable 40 to pass through is formed inside the cable installation portion 111 and the buckle 112. In the assembling process, the cable 40 passes through the channel formed by the cable mounting part 111 and the buckle 112, and the buckle 112 is correspondingly buckled with the cable mounting part 111 or fixedly connected with the cable mounting part 111 through ultrasonic welding to fix the cable 40.
The control circuit board 12 is roughly in a strip-shaped plate-shaped structure, and the structure of the box body 11 is matched with that of the control circuit board 12. The control circuit board 12 is provided with an MPPT module 14 connected with a photovoltaic module battery sub-string, a DC/DC converter 15, a bypass diode 16, a sub-string level bus bar connection area 121 and cable line connection areas 122 arranged at two ends of the control circuit board 12, and the DC/DC converter 15 is electrically connected with the MPPT module 14 to realize tracking control of maximum power generation power of the photovoltaic module battery sub-string. The MPPT module 14 is used for ensuring that the photovoltaic module substrings provide maximum power so as to eliminate the problem of performance mismatch between minimum plates. The bypass diode 16 is a schottky diode, which is low in cost and convenient to assemble, and can reduce the production cost under the condition of ensuring that the temperature rise meets the requirement. Compared with the traditional optimizer, the length of the box body of the optimizer is properly increased, and the heat dissipation capacity is improved, so that even if a Schottky diode is used as a bypass element, the temperature rise in the box body is not too high under the condition of allowing large current to pass, and the application requirement can be met. The sub-string-level bus bar connection region 121 includes a slit for the bus bar to pass through and a bus bar welding region for welding connection with the sub-string bus bar of the photovoltaic module. The bypass diode 16 is connected with the output end of the DC/DC converter, the cathode of the bypass diode is connected with the anode of the output end of the DC/DC converter, and the anode of the bypass diode is connected with the cathode of the output end of the DC/DC converter; the cable connection area 122 is used to connect the control circuit board 12 to the cables 40 at both ends of the optimizer.
Referring to fig. 2, a plurality of positioning posts 113 are disposed inside the box 11, a plurality of positioning holes 123 are disposed on the control circuit board 12, and the structure of the positioning holes 123 matches the structure of the positioning posts 113. In an embodiment, four positioning columns 113 are arranged inside the box body 11, four positioning holes 123 are correspondingly arranged on the control circuit board 12, during assembly, the control circuit board 12 is arranged in the box body 11, and the positioning columns 113 in the box body 11 penetrate through the corresponding positioning holes 123 on the control circuit board 12, so that assembly accuracy can be guaranteed, and product quality is improved. In other embodiments, the number and arrangement of the positioning posts 113 and the positioning holes 123 can be set reasonably according to actual requirements.
In the low-cost split type photovoltaic module efficiency management intelligent optimizer 100 according to embodiment 1 of the present invention, the control circuit board 12 is further provided with a conductive body 17, please refer to fig. 2 to 5 in combination, fig. 5 is a schematic structural diagram of the conductive body in the low-cost split type photovoltaic module efficiency management intelligent optimizer according to embodiment 1 of the present invention, the conductive body 17 is made of copper, a first end of the conductive body 17 is fixedly connected to the cable connection area 122, and a second end of the conductive body 17 is connected to the cable 40.
In one embodiment, the cable connecting area 122 is provided with a plurality of connecting holes 124, the first end of the conductive body 17 is provided with a plurality of connecting claws 171, and each connecting claw 171 passes through the corresponding connecting hole 124 to realize the connection, such as welding fixation, of the conductive body 17 and the cable connecting area 122. First notches 172 are formed in two sides of the joint of each connecting claw 171 and the first end of the conductor 17, so that certain surplus can be guaranteed, and stress concentration is avoided. The second end of the conductor 17 is U-shaped, and the middle of the two sides of the conductor is provided with a second notch 173. During the connection, conductor 17 and conductor 40 are riveted in the U type structure of conductor 17 is arranged in to the metal heart yearn head of cable 40, and the riveting condition of cable conductor both conveniently has been observed in the design of second breach 173, conveniently carries out extra soldering tin in the riveting department again, makes the riveting department atress even, increases riveting firmness, prolongs the life of intelligent optimization ware.
In another preferred embodiment, the conductive body 17 may also be a part of the cable connecting area 122, for example, a metal (e.g., copper) flange structure may be formed at the cable connecting area 122, and the metal core of the cable 40 is directly welded to the cable connecting area 122 by resistance welding.
In order to standardize components during production, facilitate part management and reduce production cost, the intelligent optimizer 100 of the present invention may adopt a standardized design, that is, the three optimizers have the same structure, the cable installation parts 111 are disposed at two ends of the box body 11, and the electric conductors 17 are disposed at two ends of the control circuit board 12. However, the present invention is not limited to this, and in actual production, different designs may be performed according to the installation position of the intelligent optimizer.
Further, the left end of the left optimizer 10 is connected with a first connector 50 through a cable 40, and the right end of the right optimizer 30 is connected with a second connector 60 through the cable 40. The first connector 50 and the second connector 60 are used for realizing connection between the photovoltaic module and other photovoltaic modules or other equipment in the photovoltaic system; the right end of the left optimizer and the left end of the middle optimizer are connected together through a cable 40. In one embodiment, the first connector 50 is a negative connector and the second connector 60 is a positive connector. Of course, the utility model is not limited thereto, and in other embodiments, the first connector 50 may also be a positive connector, and the second connector 60 may also be a negative connector.
Referring to fig. 6 and 7 in combination, fig. 6 is a schematic structural diagram of a low-cost split-type photovoltaic module efficiency management intelligent optimizer in embodiment 1 of the present invention when applied to a photovoltaic module; fig. 7 is an electrical connection diagram of the low-cost split-type photovoltaic module efficiency management intelligent optimizer of embodiment 1 of the present invention when applied to a photovoltaic module. When the low-cost split-type photovoltaic module efficiency management intelligent optimizer 100 is applied to a photovoltaic module 200, the photovoltaic module substring bus bars 201 are directly connected with the substring-level bus bar connection region 121 in each optimizer in a welding manner, and each optimizer corresponds to one battery string in the photovoltaic module. Taking a general photovoltaic module composed of 72 battery pieces as an example, 24 battery pieces in each two rows are connected in series to form a battery string, and each battery string is connected with an optimizer, so that each battery string comprises an MPPT module 14 and a bypass diode 16, and MPPT control can be performed on each battery string in the photovoltaic module, thereby optimizing the power generation efficiency and improving the power generation capacity of the photovoltaic system. In application, the DC/DC converter 15 is electrically connected with the MPPT module 14 to track and control the maximum power generation power of the photovoltaic module battery substring; the bypass diode 16 is connected between the negative electrode of the single-string battery piece and the positive electrode of the DC/DC output, and the current acquisition part of the DC/DC converter 15 is provided with an LC filter circuit, so that interference signals can be eliminated, and the control precision is ensured.
In the low-cost split type photovoltaic module efficiency management intelligent optimizer, the MPPT module is integrated on the control circuit board, so that the optimization of the sub-string level power generation efficiency can be realized, the sub-string level MPPT control is independently carried out, the problem of performance mismatch between minimum boards is eliminated, and the power generation capacity of a photovoltaic system is improved; the conventional Schottky diode is used as a bypass element, so that the production cost is reduced on the premise of ensuring the high-current passing capability and meeting the requirement of temperature rise, and the diode can be a shaft type diode or a surface-mounted diode; adopt cable conductor lug connection between the optimizer, in the subassembly course of working, only need with photovoltaic module substring busbar and control circuit board's substring level busbar joining region be connected can, reduced the production degree of difficulty, do not bring extra change to current subassembly production technology, improved production efficiency.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the utility model. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (10)
1. The utility model provides a split type photovoltaic module efficiency management intelligent optimization ware of low cost which characterized in that: the optimization system comprises a left optimizer, a middle optimizer and a right optimizer, wherein adjacent optimizers are connected through cables, and each optimizer comprises a box body, a control circuit board arranged in the box body and a box cover capable of being buckled with the box body; a cable installation part and a buckle are arranged at the end part of the box body, and a channel for the cable to pass through is formed in the cable installation part and the buckle; the control circuit board is provided with an MPPT module, a DC/DC converter, a bypass diode, a sub-string level bus bar connection area and a cable connection area which are connected with the photovoltaic module battery sub-string; the sub-cascade bus bar connection region comprises a slit for a bus bar to pass through and a bus bar welding region; the DC/DC converter is electrically connected with the MPPT module to perform maximum power tracking control on the photovoltaic module battery substrings; the bypass diode is a Schottky diode and is connected with the output end of the DC/DC converter; the cable is connected with the control circuit board through the cable connecting area.
2. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 1 wherein: the bypass diode is an axial diode or a patch diode.
3. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 1 or 2, wherein: the box body is internally provided with a plurality of positioning columns, the control circuit board is provided with a plurality of positioning holes, and the structures of the positioning holes are matched with the structures of the positioning columns.
4. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 1 or 2, wherein: the control circuit board is also provided with a conductor, and a cable is connected with the cable connecting area through the conductor.
5. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 4, wherein: the conductor and the cable connecting area are integrally formed.
6. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 4, wherein: the conductor comprises a first end and a second end, the first end is connected with the cable connection area, and the second end is connected with the cable.
7. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 6, wherein: the cable conductor connecting area is provided with a plurality of connecting holes, the first end of the conductor is provided with a plurality of connecting claws, and each connecting claw penetrates through the corresponding connecting hole.
8. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 6, wherein: and the second end of the conductor is of a U-shaped structure.
9. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 4, wherein: the cable installation parts are arranged at two ends of the box body, and the electric conductors are arranged at two ends of the control circuit board.
10. The low-cost split photovoltaic module efficiency management intelligent optimizer of claim 1 wherein: the left end of the left optimizer is connected with a first connector through a cable, and the right end of the right optimizer is connected with a second connector through a cable.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116056399A (en) * | 2023-01-12 | 2023-05-02 | 江苏泽润新能科技股份有限公司 | A glue filling method with a simple structure optimizer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116056399A (en) * | 2023-01-12 | 2023-05-02 | 江苏泽润新能科技股份有限公司 | A glue filling method with a simple structure optimizer |
| CN116056399B (en) * | 2023-01-12 | 2026-03-24 | 江苏泽润新能科技股份有限公司 | A potting method with a simple structure optimizer |
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