Direct-current optical stacking module and photovoltaic power supply system

Abstract

The utility model provides a direct-current stacked optical module and a photovoltaic power supply system, which are characterized in that the internal space of a shell is divided into a first chamber and a second chamber which are arranged left and right, and a wiring window is arranged at the top of one side, close to the front surface of the shell, of the second chamber; the photovoltaic module is arranged in the first cavity, and the power distribution module and the photovoltaic wiring terminal are arranged in the front space of the second cavity side by side and face the front face. The photovoltaic wiring terminals are in one-to-one correspondence with the photovoltaic modules and are electrically connected with the input ends of the rear ends of the corresponding photovoltaic modules; the bus positive line bank is arranged in the second cavity and is positioned in the wiring window; the bus positive line bank is electrically connected with the output end positive electrode of the rear end of each photovoltaic module. The first end of the power distribution module is connected with the cathode of the DC bus, and the second end is electrically connected with the output end cathode of each photovoltaic module. Separated unit modules in a solar power generation system are assembled in a unified mode, wiring complexity is simplified, maintenance is convenient, and the size is small.

Description

Technical Field

[0001] The utility model relates to the field of new energy, in particular to a direct current stacked light module and a photovoltaic power supply system. Background Art

[0002] Solar power generation devices can provide low-carbon, clean energy for DC loads of 4G / 5G communication base stations and distributed data centers. With the continuous advancement of solar power generation technology, the application prospects of DC stacking technology in the field of base station power supply are becoming more and more broad; DC stacking technology is a technology that converts solar energy into DC power to supply base station equipment through a solar power generation system. It has the advantages of environmental protection and energy saving, high reliability, strong adaptability, and low operating costs. In order to realize the application of solar power generation in base stations, it is necessary to install solar controllers, lightning protection devices, remote monitoring modules and other equipment. How to assemble these separate unit modules in a unified manner, which can be convenient for installation and maintenance and save space in the machine room, is an urgent problem to be solved.

[0003] Existing DC stacked optical modules generally have problems such as low internal space utilization, large size, inconvenient maintenance, and low integration. Therefore, how to reduce the size of the DC stacked optical module, simplify the structure, facilitate maintenance, and improve integration has become a problem that needs to be solved urgently by those skilled in the art.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a DC stacked optical module and a photovoltaic power supply system, which are used to solve the problem of unified assembly of separate unit modules in the solar power generation system in the prior art, which is convenient for installation and maintenance and can save space in the machine room.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a DC stacked optical module, which at least includes:

[0007] Shell, power distribution module, busbar positive wiring bar, N groups of photovoltaic terminals and N groups of photovoltaic modules, where N is a natural number greater than or equal to 1;

[0008] The longitudinal partition in the shell divides the internal space of the shell into a first chamber and a second chamber arranged on the left and right, and a wiring window is arranged on the top shell of the second chamber close to the front side of the shell;

[0009] The photovoltaic module is arranged in the first chamber, and the power distribution module and the photovoltaic terminal are arranged side by side in the front space of the second chamber, and both face the front of the shell;

[0010] Each photovoltaic terminal corresponds to each photovoltaic module one by one, and is electrically connected to the input terminal at the rear end of the corresponding photovoltaic module;

[0011] The busbar positive wiring bar is arranged in the second chamber and is located in the wiring window; the busbar positive wiring bar is electrically connected to the positive pole of the output terminal at the rear end of each photovoltaic module;

[0012] The first end of the power distribution module is connected to the negative pole of the DC bus, and the second end is electrically connected to the negative pole of the output end of each photovoltaic module.

[0013] Optionally, the busbar positive connection bar and the parallel power distribution modules and the photovoltaic connection terminals are arranged in a stepped manner, and the busbar positive connection bar is located above the rear side of the parallel power distribution modules and the photovoltaic connection terminals.

[0014] Optionally, the DC stacked optical module further includes a step-down module, a current sampling device and a DC ammeter;

[0015] The step-down module is arranged in the rear space of the second chamber, and the input end is electrically connected to the output end of the rear end of each photovoltaic module;

[0016] The DC meter, the power distribution module and the photovoltaic terminal blocks are arranged side by side in the front space of the second chamber, and the current sampling device is arranged in the rear space of the second chamber; the DC meter obtains electric energy from the step-down module; one end of the current sampling device is connected to the second end of the power distribution module, and the other end is electrically connected to the negative pole of the output end of each photovoltaic module, samples the current flowing through the DC bus, and transmits the sampling signal to the DC meter.

[0017] More optionally, the current sampling device is implemented based on a shunt or a Hall sensor.

[0018] More optionally, the DC stacked optical module also includes a remote monitoring module; the remote monitoring module is arranged in the rear space of the second chamber, obtains electrical energy from the step-down module, and is connected to the DC meter and each photovoltaic module.

[0019] More optionally, the DC stacked light module also includes a photovoltaic control module; the photovoltaic control module is arranged in the rear space of the second chamber, one end of which is connected to the remote monitoring module, and the other end is connected to and controls each of the photovoltaic modules.

[0020] More optionally, the DC stacked optical module also includes N groups of photovoltaic lightning protection modules corresponding to each photovoltaic module one by one, one end of each photovoltaic lightning protection module is connected to the input end of the corresponding photovoltaic module, and the other end is grounded; the photovoltaic lightning protection module, the power distribution module and the photovoltaic terminal are arranged side by side in the front space of the second chamber and are located in the wiring window; or the photovoltaic lightning protection module is arranged in the rear space of the second chamber.

[0021] More optionally, the DC stacked optical module also includes N groups of photovoltaic wiring buses corresponding to each photovoltaic module one by one, and the photovoltaic modules and photovoltaic lightning protection modules are connected to the photovoltaic wiring terminals via the corresponding photovoltaic wiring buses; each photovoltaic wiring bus is located in the rear space of the second chamber.

[0022] More optionally, the DC stacked optical module further includes a capacitor module, which is located in the rear space of the second chamber and connected to the output end of the corresponding photovoltaic module.

[0023] In order to achieve the above-mentioned purpose and other related purposes, the utility model also provides a photovoltaic power supply system, which at least includes:

[0024] Photovoltaic panels and the above-mentioned DC stacked light modules;

[0025] The photovoltaic panel is connected to the photovoltaic connection terminal of the DC stacked light module, and the DC stacked light module controls the photovoltaic panel to supply power to the load.

[0026] Optionally, a remote monitoring module is further provided in the DC stacked optical module, and the remote monitoring module obtains electric energy from the step-down module;

[0027] The photovoltaic power supply system also includes a host computer, which communicates with the remote monitoring module and realizes remote monitoring.

[0028] Optionally, the photovoltaic power supply system also includes an AC / DC rectifier module, the input end of the AC / DC rectifier module receives an AC power supply, the positive pole of the output end is connected to the bus positive terminal block of the DC stacked light module, and the negative pole of the output end is connected to the negative pole of the DC bus.

[0029] As described above, the DC stacked light module and photovoltaic power supply system of the present invention have the following beneficial effects:

[0030] 1. The DC stacked light module of the utility model assembles the separate unit modules in the solar power generation system in a unified manner, which is convenient for installation and maintenance and can save space in the machine room.

[0031] 2. The DC stacked light module and photovoltaic power supply system of the utility model arranges the busbar positive wiring row in the front space of the second chamber, and realizes wiring with the outside through the wiring window, which simplifies the wiring complexity and facilitates maintenance.

[0032] 3. The DC stacked optical module and photovoltaic power supply system of the present invention arranges the power distribution module, terminal block, and DC meter in the front space, and arranges the current sampling device and remote monitoring module in the rear space, which can greatly reduce the volume of the DC stacked optical module and is suitable for small and medium power new energy storage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Shown is a front view stereoscopic structural schematic diagram of a DC stacked optical module of the present invention.

[0034] Figure 2 Shown is a front view structural schematic diagram of the DC stacked optical module of the present invention.

[0035] Figure 3 Shown is a rear-view stereoscopic structural schematic diagram of the DC stacked light module of the present invention.

[0036] Figure 4 Shown is a schematic diagram of the circuit structure of the photovoltaic power supply system of the present utility model.

[0037] Component number description

[0038] 1 DC stacked optical module

[0039] 10 Housing

[0040] 10a First chamber

[0041] 10b Second chamber

[0042] 10c Wiring Window

[0043] 101 Left Panel

[0044] 102 Right Panel

[0045] 103 Top Panel

[0046] 104 Bottom Panel

[0047] 11 Power distribution module

[0048] 12a Busbar positive terminal block

[0049] 12b Busbar negative busbar

[0050] 13a Photovoltaic terminal block

[0051] 13b Photovoltaic wiring busbar

[0052] 14a Photovoltaic modules

[0053] 14b Photovoltaic control module

[0054] 15 Buck Module

[0055] 16a Current sampling device

[0056] 16b DC ammeter

[0057] 17 Remote monitoring module

[0058] 18a Photovoltaic lightning protection module

[0059] 18b busbar lightning protection module

[0060] 19 Display

[0061] 2 Photovoltaic panels

[0062] 3 Photovoltaic combiner box

[0063] 4 AC / DC rectifier module DETAILED DESCRIPTION

[0064] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0065] See also Figure 1 to Figure 4 It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the utility model, and the drawings only show the components related to the utility model rather than the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0066] like Figure 1 to Figure 4 As shown, the utility model provides a DC stacked optical module 1, and the DC stacked optical module 1 includes:

[0067] The housing 10 , the power distribution module 11 , the busbar positive connection bar 12 a , N groups of photovoltaic connection terminals 13 a and N groups of photovoltaic modules 14 a , where N is a natural number greater than or equal to 1.

[0068] like Figure 1 and Figure 2As shown, the shell 10 is used to accommodate the electronic components in the DC stacked optical module 1; the longitudinal partition 100 in the shell 10 divides the internal space of the shell 10 into a first chamber 10a and a second chamber 10b arranged on the left and right, and a wiring window 10c is arranged on the top shell of the second chamber 10b close to the front side of the shell.

[0069] Specifically, in this embodiment, the housing 10 includes five panels, namely a rear panel (not shown in the figure), a left panel 101, a right panel 102, a top panel 103 and a bottom panel 104 (a front panel is not provided, and can be provided as needed in actual use); an opening is provided on the top panel 104 corresponding to the second chamber 10b, near the front of the housing. It should be noted that the shape of the housing 10 can also be set according to actual needs, and is not limited to this embodiment.

[0070] like Figure 1 and Figure 2 As shown, the photovoltaic module 14a is disposed in the first chamber 10a.

[0071] Specifically, in this embodiment, two groups of photovoltaic modules 14a are arranged side by side in the first chamber 10a; in actual use, the two groups of photovoltaic modules 14a can also be stacked in the first chamber 10a. The number of photovoltaic modules 14a is set according to actual needs. When the number of photovoltaic modules 14a is greater than or equal to 3 groups, each photovoltaic module 14a can be arranged side by side, or stacked in sequence, or partially side by side and partially stacked, which will not be described one by one here. The input end and output end of each group of photovoltaic modules 14a are both arranged at the rear end thereof to simplify the wiring in front of the DC stacked optical module 1 to achieve the purpose of hot plugging.

[0072] like Figure 1 and Figure 2 As shown, the photovoltaic terminal 13 a and the power distribution module 11 are arranged side by side in the front space of the second chamber 10 b and both face the front of the housing 10 .

[0073] Specifically, Figure 4 As shown, the photovoltaic positive terminal and the photovoltaic negative terminal constitute a group of photovoltaic terminals 13a, each group of photovoltaic terminals 13a corresponds to each group of photovoltaic modules 14a, and each photovoltaic terminal 13a is electrically connected to the input terminal of the rear end of the corresponding photovoltaic module 14a; the photovoltaic positive terminal is connected to the positive pole of the input terminal of the corresponding photovoltaic module 14a, and the photovoltaic negative terminal is connected to the negative pole of the input terminal of the corresponding photovoltaic module 14a. In this embodiment, two groups of photovoltaic terminals 13a and two groups of photovoltaic modules 14a are provided. In actual use, the number of photovoltaic terminals 13a and photovoltaic modules 14a is set according to needs.

[0074] Specifically, Figure 4As shown, the first end of the power distribution module 11 is connected to the negative pole of the DC bus, and the second end is electrically connected to the negative pole of the output end of each photovoltaic module 14a. In this embodiment, a bus negative bus 12b is also provided between the power distribution module 11 and the negative pole of the output end of each photovoltaic module 14a, and the bus negative bus 12b is used to realize the switching, thereby simplifying the wiring complexity. In this embodiment, the power distribution module 11 is a circuit breaker or a fuse. In actual use, any device that can disconnect the circuit when the current is too large to realize the protection function is applicable, including but not limited to air-type and ceramic-type devices, which are not described one by one here.

[0075] like Figure 1 and Figure 2 As shown, the busbar positive wiring bar 12a is disposed in the second chamber 10b and located in the wiring window 10c; the busbar positive wiring bar 12a is electrically connected to the positive pole of the output terminal at the rear end of each photovoltaic module 14a.

[0076] Specifically, in this embodiment, the bus positive wiring bar 12a is set as a bus bar, and the positive pole of the output end of each photovoltaic module 14a is connected to the bus positive wiring bar 12a, and the positive pole of the output end of each photovoltaic module 14a is electrically connected to the positive pole of the DC bus through the bus bar to simplify the wiring. In actual use, the bus positive wiring bar 12a can also use a wiring terminal, which is not limited to this embodiment.

[0077] like Figure 1 and Figure 2 As shown, in order to facilitate wiring, the bus positive wiring bar 12a and the side-by-side power distribution module 11 and photovoltaic terminal 13a are arranged in a stepped manner, and the bus positive wiring bar 12a is located above the rear side of the side-by-side power distribution module 11 and photovoltaic terminal 13a; the external wires can be introduced from the top of the bus positive wiring bar 12a, the power distribution module 11 and the photovoltaic terminal 13a through the wiring window 10c, and the internal wires or busbars are respectively led out through the rear space or bottom space of the bus positive wiring bar 12a, the power distribution module 11 and the photovoltaic terminal 13a. In actual use, the bus positive wiring bar 12a can also be stacked up and down with the power distribution module 11 and the photovoltaic terminal 13a, or arranged side by side, as long as the wiring can be achieved, and it is not limited to this embodiment.

[0078] As another implementation of the present invention, Figure 1 to Figure 4 As shown, the DC stacked optical module 1 also includes a voltage reduction module 15, a current sampling device 16a and a DC meter 16b. Figure 3 and Figure 4As shown, the step-down module 15 is arranged in the rear space of the second chamber 10b, and the input end is electrically connected to the output end of the rear end of each photovoltaic module 14a, and the bus voltage is stepped down (including but not limited to converting DC 48V to DC 24V) to supply power to the current sampling device 16a and the DC meter 16b; as an example, the positive pole of the input end of the step-down module 15 is connected to the bus positive wiring bar 12a, and the negative pole of the input end is connected to the bus negative bus bar 12b. Figure 3 and Figure 4 As shown, the current sampling device 16a is arranged in the rear space of the second cavity 10b; one end of the current sampling device 16a is connected to the second end of the power distribution module 11, and the other end is electrically connected to the negative pole of the output end of each photovoltaic module 14a (in this example, the current sampling device 16a is connected to the negative pole of the output end of each photovoltaic module 14a through the bus negative bus 12b), samples the current flowing through the DC bus, and transmits the sampling signal to the DC meter 15; as an example, the current sampling device 16a is implemented based on a shunt or a Hall sensor. When a shunt is used, the shunt is connected in series between the second end of the power distribution module 11 and the bus negative bus 12b, and the output end is connected to the DC meter 16b; when a Hall sensor is used, the second end of the power distribution module 11 is connected to the bus negative bus 12b through a wire, and the Hall sensor is set on the periphery of the wire, senses the current size through the magnetic field, and transmits the sensed result to the DC meter 16b. As shown Figure 1 , Figure 2 and Figure 4 As shown, the DC meter 16b, the power distribution module 11 and the photovoltaic terminal 13a are arranged side by side in the front space of the second chamber 10b; the DC meter 16b obtains electric energy from the step-down module 15 and displays the current value collected by the current sampling device 16a; it can also be connected to the bus positive bus bar 12a and the bus negative bus bar 12b to sample and display the voltage value.

[0079] Furthermore, if Figure 4 As shown, the DC stacked optical module 1 also includes a remote monitoring module 17; the remote monitoring module 17 is arranged in the rear space of the second chamber 10b, obtains electric energy from the step-down module 15, and is connected to the DC meter 16b and each photovoltaic module 14a. The remote monitoring module 17 communicates with the external remote host computer APP, remotely transmits the information of the DC meter 16b, and remotely monitors each photovoltaic module 14a.

[0080] Furthermore, if Figure 3 and Figure 4As shown, the DC stacked optical module 1 also includes a photovoltaic control module 14b (PT-ADP); the photovoltaic control module 14b is arranged in the rear space of the second chamber 10b, one end of which is connected to the remote monitoring module 17, and the other end is connected to and controls each photovoltaic module 14a; the control signal output by the remote monitoring module 17 is summarized and transmitted to each photovoltaic module 14a, and the information of each photovoltaic module 14a is summarized and transmitted to the remote monitoring module 17.

[0081] As another implementation of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, the DC stacked light module 1 also includes N groups of photovoltaic lightning protection modules 18a corresponding to each photovoltaic module one by one; as an example, the photovoltaic lightning protection module 18a, the power distribution module 11 and the photovoltaic wiring terminal 13a are arranged side by side in the front space of the second chamber 10b, and are located in the wiring window 10c; as another example, the photovoltaic lightning protection module 18a is arranged in the rear space of the second chamber 10b. One end of each photovoltaic lightning protection module 18a is connected to the input end of the corresponding photovoltaic module 14a, and the other end is grounded; it is used to protect each photovoltaic module 14a from lightning damage. In order to facilitate wiring, the DC stacked light module 1 also includes N groups of photovoltaic wiring buses 13b corresponding to each photovoltaic module 14a one by one, such as Figure 4 As shown, the photovoltaic module 14a and the photovoltaic lightning protection module 14a are connected to the photovoltaic terminal 13a via the corresponding photovoltaic wiring bus 13b; that is, the photovoltaic module 14a and the photovoltaic lightning protection module 14a connected to the same set of photovoltaic terminals 13a are connected to the corresponding photovoltaic wiring bus 13b, and then connected to the corresponding photovoltaic terminal 13a via the photovoltaic wiring bus 13b. Each photovoltaic wiring bus 12b is located in the rear space of the second chamber 10b.

[0082] As another implementation of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, the DC stacked optical module 1 also includes a busbar lightning protection module 18b, which is arranged side by side with the power distribution module 11 and the photovoltaic terminal 13a in the front space of the second chamber 10b and is located in the wiring window 10c. Alternatively, the busbar lightning protection module 18b is arranged in the rear space of the second chamber 10b. One end of the busbar lightning protection module 18b is connected to the busbar negative bus 12b, and the other end is grounded; it is used to protect the devices connected to the busbar from lightning damage.

[0083] As another implementation method of the present invention, the DC stacked light module 1 also includes a capacitor module (not shown in the figure), which is located in the rear space of the second chamber 10b and connected to the output end of the corresponding photovoltaic module 14a, and is used to reduce the fluctuations of the bus voltage caused by solar energy fluctuations and the fluctuations of the bus voltage caused by the photovoltaic control module.

[0084] As another implementation of the present invention, Figure 1 and Figure 2 As shown, the DC stacked optical module 1 also includes a display screen 19, which is arranged side by side with the power distribution module 11, the photovoltaic terminal 13a and the photovoltaic lightning protection module 18a in the front space of the second chamber 10b, and is electrically connected to the photovoltaic module 14a to display the status information of the DC stacked optical module 1.

[0085] like Figure 4 As shown, the utility model also provides a photovoltaic power supply system, the photovoltaic power supply system comprises:

[0086] Photovoltaic panel 2 and DC stacked light module 1 of the present invention.

[0087] like Figure 4 As shown, the photovoltaic panel 2 is connected to the photovoltaic terminal 13a of the DC stacked light module 1, and the DC stacked light module 1 controls the photovoltaic panel 2 to supply power to the load.

[0088] Specifically, in this embodiment, a photovoltaic combiner box 3 is connected in series between the photovoltaic panel 2 and the photovoltaic connection terminal 13 a.

[0089] like Figure 4 As shown, when a remote monitoring module 17 is provided in the DC stacked optical module 1, the photovoltaic power supply system further includes a host computer (not shown in the figure), which communicates with the remote monitoring module 17 and implements remote monitoring.

[0090] As another implementation method of the present invention, the photovoltaic power supply system also includes an AC / DC rectifier module 4, the input end of the AC / DC rectifier module 4 receives an AC power source (in this example, an AC power grid), the positive pole of the output end is connected to the bus positive terminal bar 12a of the DC stacked light module 1, and the negative pole of the output end is connected to the negative pole of the DC bus (that is, the first end of the distribution module 11), which is used to convert AC power into DC power.

[0091] The DC stacked optical module of the utility model unifies the separate unit modules in the solar power generation system, directly integrates the electric energy generated by solar energy into the DC bus, increases the proportion of green electricity in the base station, increases the backup power time of the base station, facilitates installation and maintenance, saves space in the computer room, and supports online hot swapping.

[0092] In summary, the utility model provides a DC stacked optical module and a photovoltaic power supply system, comprising: a shell, a power distribution module, a bus positive wiring bar, N groups of photovoltaic terminals and N groups of photovoltaic modules, N is a natural number greater than or equal to 1; the longitudinal partition in the shell divides the internal space of the shell into a first chamber and a second chamber arranged on the left and right, and a wiring window is arranged on the top shell of the second chamber close to the front side of the shell; the photovoltaic module is arranged in the first chamber, and the power distribution module and the photovoltaic terminals are arranged side by side in the front space of the second chamber, and both face the front of the shell; each photovoltaic terminal corresponds to each photovoltaic module one by one, and is electrically connected to the input end of the rear end of the corresponding photovoltaic module; the bus positive wiring bar is arranged in the second chamber and is located in the wiring window; the bus positive wiring bar is electrically connected to the positive pole of the output end of the rear end of each photovoltaic module; the first end of the power distribution module is connected to the negative pole of the DC bus, and the second end is electrically connected to the negative pole of the output end of each photovoltaic module. The DC stacked light module of the utility model assembles the separated unit modules in the solar power generation system in a unified manner, which is convenient for installation and maintenance and can save space in the machine room; the busbar positive wiring row is set in the front space of the second chamber, and the wiring with the outside is realized through the wiring window, which simplifies the wiring complexity and facilitates maintenance; the power distribution module, wiring row, and DC meter are set in the front space, and the current sampling device and remote monitoring module are set in the rear space, which can greatly reduce the volume of the DC stacked light module and is suitable for small and medium power new energy storage scenarios. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0093] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A DC stacked optical module, characterized in that: The DC stacked optical module at least comprises: Shell, power distribution module, busbar positive wiring bar, N groups of photovoltaic terminals and N groups of photovoltaic modules, where N is a natural number greater than or equal to 1; The longitudinal partition in the shell divides the internal space of the shell into a first chamber and a second chamber arranged on the left and right, and a wiring window is arranged on the top shell of the second chamber close to the front side of the shell; The photovoltaic module is arranged in the first chamber, and the power distribution module and the photovoltaic terminal are arranged side by side in the front space of the second chamber, and both face the front of the shell; Each photovoltaic terminal corresponds to each photovoltaic module one by one, and is electrically connected to the input terminal at the rear end of the corresponding photovoltaic module; The busbar positive wiring bar is arranged in the second chamber and is located in the wiring window; the busbar positive wiring bar is electrically connected to the positive pole of the output terminal at the rear end of each photovoltaic module; The first end of the power distribution module is connected to the negative pole of the DC bus, and the second end is electrically connected to the negative pole of the output end of each photovoltaic module.

2. The DC stacked optical module according to claim 1, characterized in that: The busbar positive connection row and the parallel power distribution module and the photovoltaic connection terminal are arranged in a stepped manner, and the busbar positive connection row is located above the rear side of the parallel power distribution module and the photovoltaic connection terminal.

3. The DC stacked optical module according to claim 1, characterized in that: The DC stacked optical module also includes a step-down module, a current sampling device and a DC ammeter; The step-down module is arranged in the rear space of the second chamber, and the input end is electrically connected to the output end of the rear end of each photovoltaic module; The DC meter, the power distribution module and the photovoltaic terminal blocks are arranged side by side in the front space of the second chamber, and the current sampling device is arranged in the rear space of the second chamber; the DC meter obtains electric energy from the step-down module; one end of the current sampling device is connected to the second end of the power distribution module, and the other end is electrically connected to the negative pole of the output end of each photovoltaic module, samples the current flowing through the DC bus, and transmits the sampling signal to the DC meter.

4. The DC stacked optical module according to claim 3, characterized in that: The current sampling device is implemented based on a shunt or a Hall sensor.

5. The DC stacked optical module according to claim 3 or 4, characterized in that: The DC stacked optical module also includes a remote monitoring module; the remote monitoring module is arranged in the rear space of the second chamber, obtains electric energy from the step-down module, and is connected to the DC meter and each photovoltaic module.

6. The DC stacked optical module according to claim 5, characterized in that: The DC stacked light module also includes a photovoltaic control module; the photovoltaic control module is arranged in the rear space of the second chamber, one end of which is connected to the remote monitoring module, and the other end is connected to and controls each of the photovoltaic modules.

7. The DC stacked optical module according to any one of claims 1 to 4, characterized in that: The DC stacked optical module also includes N groups of photovoltaic lightning protection modules corresponding to each photovoltaic module one by one, one end of each photovoltaic lightning protection module is connected to the input end of the corresponding photovoltaic module, and the other end is grounded; the photovoltaic lightning protection module, the power distribution module and the photovoltaic terminal are arranged side by side in the front space of the second chamber and are located in the wiring window; or the photovoltaic lightning protection module is arranged in the rear space of the second chamber.

8. The DC stacked optical module according to claim 7, characterized in that: The DC stacked optical module also includes N groups of photovoltaic wiring buses corresponding to each photovoltaic module one by one. The photovoltaic modules and photovoltaic lightning protection modules are connected to the photovoltaic wiring terminals via the corresponding photovoltaic wiring buses; each photovoltaic wiring bus is located in the rear space of the second chamber.

9. The DC stacked optical module according to any one of claims 1 to 4, characterized in that: The DC stacked light module also includes a capacitor module, which is located in the rear space of the second chamber and connected to the output end of the corresponding photovoltaic module.

10. A photovoltaic power supply system, characterized in that: The photovoltaic power supply system at least comprises: Photovoltaic panel and the DC stacked light module as claimed in any one of claims 1 to 9; The photovoltaic panel is connected to the photovoltaic connection terminal of the DC stacked light module, and the DC stacked light module controls the photovoltaic panel to supply power to the load.

11. The photovoltaic power supply system according to claim 10, characterized in that: A remote monitoring module is also provided in the DC stacked optical module. When the DC stacked optical module includes a step-down module, the remote monitoring module obtains electrical energy from the step-down module. The photovoltaic power supply system also includes a host computer, which communicates with the remote monitoring module and realizes remote monitoring.

12. The photovoltaic power supply system according to claim 10 or 11, characterized in that: The photovoltaic power supply system also includes an AC / DC rectifier module, the input end of the AC / DC rectifier module receives an AC power supply, the positive pole of the output end is connected to the bus positive terminal block of the DC stacked light module, and the negative pole of the output end is connected to the negative pole of the DC bus.

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