Back contact battery cascade structure applied to system power supply module

Abstract

The utility model relates to a back contact battery cascade structure applied to a system power supply module. The back contact battery cascade structure comprises a plurality of photovoltaic power generation panels, a plurality of coaxial switches and a plurality of power transmission lines, the photovoltaic power generation panel comprises a plurality of back contact batteries; the back contact batteries in the same photovoltaic power generation panel are only connected in series or in parallel; a plurality of photovoltaic power generation panels form a queue, and a plurality of coaxial switches form a queue; the coaxial switch comprises at least two input ends and at least two output ends; a first input end and a first output end of the coaxial switch are respectively connected with two photovoltaic power generation panels which are adjacent front and back in the queue; the first end and the second end of the power transmission line are respectively connected with the second output ends and the second input ends of two front and back adjacent coaxial switches in the queue; the output end of the coaxial switch at the tail end of the queue is connected with a system power supply module through a transmission line. The types and the number of the photovoltaic power generation panels connected to the power supply circuit can be selected according to requirements, so that different voltages and currents required by the system power supply module are met.

Description

Technical Field

[0001] The present application relates to the technical field of battery cascade, and in particular to a back-contact battery cascade structure applied to a system power supply module. Background Art

[0002] Back-contact cells, also known as interdigitated back-contact solar cells, are a type of back-contact solar cell. The most significant feature of back-contact cells is that both the emitter and base electrodes are located on the back of the cell, which reduces shading and improves photoelectric conversion efficiency.

[0003] Photovoltaic panels formed by back-contact cells can provide power for most power usage scenarios. In some power usage scenarios, due to the different power-consuming equipment, the system power supply module needs to provide different voltages and currents, and the power generation capacity of a single photovoltaic panel is fixed, that is, the voltage and current provided by a single photovoltaic panel are fixed. In the existing technology, a single photovoltaic panel is difficult to meet the different voltages and currents required by the system power supply module. Utility Model Content

[0004] In order to at least to some extent overcome the problem in the related art that a single photovoltaic power generation panel is difficult to meet the different voltage and current requirements of the system power supply module, the present application provides a back-contact battery cascade structure applied to the system power supply module.

[0005] The scheme of this application is as follows:

[0006] A back-contact battery cascade structure applied to a system power supply module, comprising:

[0007] Multiple photovoltaic panels, multiple coaxial switches, and multiple transmission lines;

[0008] The photovoltaic panel includes a plurality of back contact cells;

[0009] Back contact cells in the same photovoltaic panel are only connected in series or only connected in parallel;

[0010] Multiple photovoltaic panels form a queue, and multiple coaxial switches form a queue;

[0011] The coaxial switch includes at least two input terminals and at least two output terminals;

[0012] The first input end and the first output end of the coaxial switch are respectively connected to two adjacent photovoltaic panels in the queue;

[0013] The first end and the second end of the transmission line are respectively connected to the second output end and the second input end of two adjacent coaxial switches in the queue;

[0014] The output end of the coaxial switch at the end of the queue is connected to the system power supply module through a transmission line.

[0015] Preferably, the feature is that the number of back contact cells in different photovoltaic panels is the same or different.

[0016] Preferably, photovoltaic panels with the same number of back contact cells are placed at adjacent positions in the queue.

[0017] Preferably, photovoltaic panels with the same back contact cell connection method are placed at adjacent positions in the queue.

[0018] Preferably, it also includes:

[0019] Multiple signage;

[0020] The signboards correspond to the photovoltaic panels one by one;

[0021] The indicator board is arranged on the side of the photovoltaic power generation panel and is used to record and indicate the voltage value and current value of the photovoltaic power generation panel.

[0022] Preferably, it also includes:

[0023] Multiple secondary power generation detection circuits;

[0024] The secondary power generation detection circuit corresponds to the photovoltaic power generation panel in a one-to-one manner;

[0025] The secondary power generation detection circuit includes: a secondary current sensor, a secondary voltage sensor, a secondary data acquisition chip and a secondary display screen;

[0026] The secondary display screen is arranged on the side of the photovoltaic power generation panel;

[0027] The secondary current sensor and the secondary voltage sensor are used to detect the voltage and current values ​​of the photovoltaic panel, and send the voltage and current values ​​of the photovoltaic panel to the secondary data acquisition chip;

[0028] The secondary data acquisition chip displays the voltage value and current value of the photovoltaic power generation panel through the secondary display screen.

[0029] Preferably, the photovoltaic panel is equipped with a pluggable battery interface;

[0030] An openable and closable baffle is provided on the outside of the battery interface;

[0031] The battery interface is connected to the battery through the battery charging line when the baffle is opened.

[0032] Preferably, the photovoltaic panel is equipped with a digitally controlled switch;

[0033] The digital control switch is connected to the battery via a power transmission line.

[0034] Preferably, it also includes:

[0035] First-level power generation detection circuit;

[0036] The primary power generation detection circuit is connected to the transmission line between the coaxial switch at the end of the queue and the system power supply module;

[0037] The first-level power generation detection circuit includes: a first-level current sensor, a first-level voltage sensor, a first-level data acquisition chip and a first-level display screen;

[0038] The primary current sensor and the primary voltage sensor are used to detect the total voltage and total current values ​​transmitted by the photovoltaic power generation panel to the system power supply module, and send the total voltage and total current values ​​to the primary data acquisition chip;

[0039] The first-level data acquisition chip displays the total voltage value and total current value transmitted by the photovoltaic power generation panel to the system power supply module through the first-level display screen.

[0040] Preferably, it also includes:

[0041] Temperature sensor;

[0042] The temperature sensor is arranged on the power transmission line between the coaxial switch at the end of the queue and the system power supply module, and is used to detect the temperature value of the power transmission line between the coaxial switch at the end of the queue and the system power supply module, and send the detected temperature value to the primary data acquisition chip;

[0043] The primary data acquisition chip displays the temperature value detected by the temperature sensor through the primary display screen.

[0044] The technical solution provided in the present application may include the following beneficial effects: the back-contact battery cascade structure applied to the system power supply module in the present application includes: multiple photovoltaic panels, multiple coaxial switches and multiple transmission lines; the photovoltaic panels include multiple back-contact batteries; the back-contact batteries in the same photovoltaic panel are only connected in series or only connected in parallel; multiple photovoltaic panels form a queue, and multiple coaxial switches form a queue; the coaxial switch includes at least two input ends and at least two output ends; the first input end and the first output end of the coaxial switch are respectively connected to the two adjacent photovoltaic panels in the queue; the first end and the second end of the transmission line are respectively connected to the second output end and the second input end of the two adjacent coaxial switches in the queue; the output end of the coaxial switch at the tail end of the queue is connected to the system power supply module through the transmission line.

[0045] On the premise that the specifications of the back-contact cells in the photovoltaic power generation panel are all the same, when the back-contact cells in the same photovoltaic power generation panel are only connected in series, the power generation current value of the photovoltaic power generation panel will be the power generation current value of any back-contact cell, and the power generation voltage value of the photovoltaic power generation panel will be the sum of the power generation voltage values ​​of all the back-contact cells in the photovoltaic power generation panel. When the back-contact cells in the same photovoltaic power generation panel are only connected in parallel, the power generation current value of the photovoltaic power generation panel will be the sum of the power generation current values ​​of all the back-contact cells, and the power generation voltage value of the photovoltaic power generation panel will be the power generation voltage value of any back-contact cell in the photovoltaic power generation panel. In this technical solution, considering that connecting multiple photovoltaic power generation panels together can simply and effectively increase the photovoltaic power generation capacity, a design is made to connect multiple photovoltaic power generation panels through a coaxial switch. In this technical solution, the connection method formed between the photovoltaic power generation panels is series connection, so that the power generation voltage in the final power supply circuit is the sum of the voltages of the photovoltaic power generation panels connected to the power supply circuit, and the power generation current in the final power supply circuit is the photovoltaic power generation panel with the lowest current among the photovoltaic power generation panels connected to the power supply circuit. In the present application, the number of photovoltaic panels connected to the power supply circuit can be controlled by a coaxial switch. The coaxial switch includes at least two input terminals and at least two output terminals. It can control the input direction of the power supply to switch between the two input terminals and control the output direction of the power supply to switch between the two output terminals. If the current photovoltaic panel needs to be connected to the power supply circuit, the coaxial switch at the front of the queue connected to the current photovoltaic panel is switched to the first output terminal, and the coaxial switch at the back of the queue connected to the current photovoltaic panel is switched to the first input terminal, so that the current photovoltaic panel can be connected to the power supply circuit. If the current photovoltaic panel needs to be removed from the power supply circuit, the coaxial switch at the front of the queue connected to the current photovoltaic panel is switched to the second output terminal, and the coaxial switch at the back of the queue connected to the current photovoltaic panel is switched to the second input terminal, so that the current photovoltaic panel can be removed from the power supply circuit. Each time a photovoltaic panel is connected to the power supply circuit, the voltage value in the power supply circuit increases. The supply voltage can be adjusted by adjusting the number of photovoltaic panels connected to the power supply circuit. Since the photovoltaic panels in this application are divided into two categories, the back-contact cells in the first type of photovoltaic panels are only connected in series, and the back-contact cells in the second type of photovoltaic panels are only connected in parallel, the two types of photovoltaic panels provide different voltages and currents. In specific practice, the type and number of photovoltaic panels connected to the power supply circuit can be selected according to needs, so as to meet the different voltages and currents required by the system power supply module.

[0046] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0048] Figure 1 This is a schematic diagram of a back contact battery cascade structure applied to a system power supply module provided by an embodiment of the present application;

[0049] Figure 2 Another back-contact battery cascade structure applied to a system power supply module provided by an embodiment of the present application;

[0050] Figure 3 Another embodiment of the present application provides a back-contact battery cascade structure applied to a system power supply module;

[0051] Figure 4 Another back-contact battery cascade structure applied to a system power supply module is provided in an embodiment of the present application.

[0052] Reference numerals: photovoltaic panel-1; coaxial switch-2; transmission line-3; back contact battery-4; storage battery-5; primary power generation detection circuit-6; temperature sensor-7. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0054] Example 1

[0055] Figure 1 This is a schematic diagram of a back contact battery cascade structure applied to a system power supply module provided by an embodiment of the present application, with reference to Figure 1 , a back contact battery cascade structure applied to a system power supply module, comprising:

[0056] A plurality of photovoltaic panels 1, a plurality of coaxial switches 2, and a plurality of transmission lines 3;

[0057] The photovoltaic panel 1 includes a plurality of back contact cells 4;

[0058] The back contact cells 4 in the same photovoltaic panel 1 are only connected in series or only connected in parallel;

[0059] A plurality of photovoltaic panels 1 form a queue, and a plurality of coaxial switches 2 form a queue;

[0060] The coaxial switch 2 includes at least two input terminals and at least two output terminals;

[0061] The first input terminal and the first output terminal of the coaxial switch 2 are respectively connected to two adjacent photovoltaic panels 1 in the queue;

[0062] The first end and the second end of the transmission line 3 are respectively connected to the second output end and the second input end of two adjacent coaxial switches 2 in the queue;

[0063] The output end of the coaxial switch 2 at the tail end of the queue is connected to the system power supply module through the transmission line 3.

[0064] It should be noted that the back-contact cells 4 in the photovoltaic panel 1 can be connected in series to increase voltage output, or in parallel to increase current output. Similarly, the photovoltaic panels 1 can also be connected in series to increase voltage output.

[0065] It should be noted that in practice, only identical photovoltaic panels (same back-contact cell connection method, same number of back-contact cells) are connected to the power supply circuit. This is because connecting multiple photovoltaic panels with the same voltage and current in series will not cause any problems. However, connecting multiple photovoltaic panels with different voltages and currents in series may result in insufficient power.

[0066] For example:

[0067] 1. Photovoltaic panels with different voltages and the same current are connected in series:

[0068] The first PV panel is 5V / 3A, the second is 7V / 3A, and the third is 9V / 3A. When connected in series, the array produces 21V at 3A, or 63W of power. Again, the output current remains the same 3A as before, but the voltage output jumps to 21V (5+7+9).

[0069] 2. Photovoltaic panels with different voltages and currents are connected in series:

[0070] The first PV panel is rated at 3V / 1A, the second at 7V / 3A, and the third at 9V / 5A. When these panels are connected in series, the voltages of the individual panels are added together, but the current in the series circuit is limited to the current of the lowest-rated PV panel in the series, which in this example is 1A. Therefore, the array will produce a voltage of 19V (3+7+9) at 1A, or only 19W of a possible 69W. This means the power output will fall short of expectations, reducing the array's efficiency. Connecting panels with different current ratings in series is only a temporary solution, as the panel with the lowest current rating determines the current output of the entire array.

[0071] Assuming that all back-contact cells 4 in a photovoltaic panel 1 have the same specifications, when the back-contact cells 4 in the same photovoltaic panel 1 are connected only in series, the generated current value of the photovoltaic panel 1 will be the generated current value of any back-contact cell 4, and the generated voltage value of the photovoltaic panel 1 will be the sum of the generated voltage values ​​of all back-contact cells 4 in the photovoltaic panel 1. When the back-contact cells 4 in the same photovoltaic panel 1 are connected only in parallel, the generated current value of the photovoltaic panel 1 will be the sum of the generated current values ​​of all back-contact cells 4, and the generated voltage value of the photovoltaic panel 1 will be the generated voltage value of any back-contact cell 4 in the photovoltaic panel 1. In this technical solution, considering that connecting multiple photovoltaic panels 1 together can simply and effectively increase photovoltaic power generation capacity, a design is made to connect multiple photovoltaic panels 1 through a coaxial switch 2. In this technical solution, the photovoltaic panels 1 are connected in series, so that the generated voltage in the final power supply circuit is the sum of the voltages of the photovoltaic panels 1 connected to the power supply circuit, and the generated current in the final power supply circuit is the photovoltaic panel 1 with the lowest current among the photovoltaic panels 1 connected to the power supply circuit.

[0072] It should be noted that the coaxial switch 2 includes common single-pole double-throw switches, double-pole double-throw switches, etc. In this technical solution, refer to Figure 1 , single-pole double-throw switches are used at the first and last positions of the coaxial switch 2 queue, and double-pole double-throw switches are used in the queue.

[0073] In this embodiment, the number of photovoltaic panels 1 connected to the power supply circuit can be controlled by a coaxial switch 2. The coaxial switch 2 includes at least two input terminals and at least two output terminals, and can control the input direction of the power supply to switch between the two input terminals and the output direction of the power supply to switch between the two output terminals. If the current photovoltaic panel 1 needs to be connected to the power supply circuit, the coaxial switch 2 at the front of the queue connected to the current photovoltaic panel 1 is switched to the first output terminal, and the coaxial switch 2 at the back of the queue connected to the current photovoltaic panel 1 is switched to the first input terminal, so that the current photovoltaic panel 1 can be connected to the power supply circuit. If the current photovoltaic panel 1 needs to be removed from the power supply circuit, the coaxial switch 2 at the front of the queue connected to the current photovoltaic panel 1 is switched to the second output terminal, and the coaxial switch 2 at the back of the queue connected to the current photovoltaic panel 1 is switched to the second input terminal, so that the current photovoltaic panel 1 can be removed from the power supply circuit. Each time a photovoltaic panel 1 is connected to the power supply circuit, the voltage value in the power supply circuit increases. The supply voltage can be adjusted by adjusting the number of photovoltaic panels 1 connected to the power supply circuit. Since the photovoltaic panels 1 in this application are divided into two categories, the back-contact cells 4 in the first type of photovoltaic panels 1 are only connected in series, and the back-contact cells 4 in the second type of photovoltaic panels 1 are only connected in parallel, the two types of photovoltaic panels 1 provide different voltages and currents. In specific practice, the type and number of photovoltaic panels 1 connected to the power supply circuit can be selected according to needs, so as to meet the different voltages and currents required by the system power supply module.

[0074] Example 2

[0075] It should be noted that, referring to Figure 2 The number of back contact cells 4 in different photovoltaic panels 1 is the same or different.

[0076] It can be understood that the back contact cells 4 in the first type photovoltaic power generation panel 1 are only connected in series. In this embodiment, the voltage value provided by the first type photovoltaic power generation panel 1 can be adjusted by adjusting the number of back contact cells 4 carried in the first type photovoltaic power generation panel 1, thereby more accurately adjusting the voltage value finally provided by the power supply circuit.

[0077] The back contact cells 4 in the second type photovoltaic power generation panel 1 are only connected in parallel. In this embodiment, the current value provided by the second type photovoltaic power generation panel 1 can be adjusted by adjusting the number of back contact cells 4 carried in the second type photovoltaic power generation panel 1, thereby more accurately adjusting the current value ultimately provided by the power supply circuit.

[0078] Since the cascade structure of the back-contact cells 4 in this technical solution can adjust the supply voltage by adjusting the number of photovoltaic panels 1 connected to the power supply circuit, the main effect of this embodiment is to adjust the supply current by adjusting the number of back-contact cells 4 in the second type photovoltaic panels 1.

[0079] Preferably, photovoltaic panels 1 with the same number of back contact cells 4 are placed at adjacent positions in the queue.

[0080] Preferably, photovoltaic panels 1 with the same back contact cell 4 connection method are placed at adjacent positions in the queue.

[0081] Reference Figure 2 In this embodiment, the photovoltaic panels 1 with the same number of back-contact cells 4 are placed at adjacent positions in the queue, which can facilitate the staff to operate the coaxial switches 2 in batches.

[0082] Similarly, placing photovoltaic panels 1 with the same back contact battery 4 connection method at adjacent positions in the queue is also to facilitate the staff to operate the coaxial switches 2 in batches.

[0083] Example 3

[0084] It should be noted that the back contact battery cascade structure used in the system power supply module also includes:

[0085] Multiple signage;

[0086] The signboards correspond to the photovoltaic panels 1 one by one;

[0087] The indicator board is arranged on the side of the photovoltaic power generation panel 1 and is used to record and indicate the voltage value and current value of the photovoltaic power generation panel 1 .

[0088] In this embodiment, by setting an indicator sign on the side of the photovoltaic panel 1, the information of the photovoltaic panel 1 (specifically the voltage and current values ​​of the photovoltaic panel 1) is indicated without affecting the power generation efficiency of the photovoltaic panel 1, so that the staff can clearly and intuitively understand the voltage and current values ​​of different photovoltaic panels 1, and thus select the appropriate photovoltaic panel 1 combination to connect to the power supply circuit according to the voltage and current required by the system power supply module.

[0089] Furthermore, the back contact battery 4-cascade structure applied to the system power supply module also includes:

[0090] Multiple secondary power generation detection circuits;

[0091] The secondary power generation detection circuit corresponds to the photovoltaic power generation panel 1 one by one;

[0092] The secondary power generation detection circuit includes: a secondary current sensor, a secondary voltage sensor, a secondary data acquisition chip and a secondary display screen;

[0093] The secondary display screen is arranged on the side of the photovoltaic power generation panel 1;

[0094] The secondary current sensor and the secondary voltage sensor are used to detect the voltage and current values ​​of the photovoltaic panel 1 and send the voltage and current values ​​of the photovoltaic panel 1 to the secondary data acquisition chip;

[0095] The secondary data acquisition chip displays the voltage and current values ​​of the photovoltaic panel 1 through the secondary display screen.

[0096] In this technical solution, the voltage and current values ​​of the photovoltaic panel 1 are detected in real time by a secondary power generation detection circuit, and the voltage and current values ​​of the photovoltaic panel 1 are displayed in real time by a secondary display screen.

[0097] On the one hand, the voltage and current values ​​of the photovoltaic panel 1 displayed on the secondary display screen can be compared with the voltage and current values ​​of the photovoltaic panel 1 recorded and indicated on the sign to determine whether there is any abnormality in the photovoltaic panel 1.

[0098] On the one hand, when the sign cannot provide clear instructions under conditions of insufficient brightness such as cloudy days or at night, the secondary display screen can provide clearer and more specific instructions.

[0099] Example 4

[0100] In this embodiment, it is considered that the photovoltaic power generation panel 1 that is not connected to the power supply circuit is still in operation. In order to avoid the waste of electric energy generated by the photovoltaic power generation panel 1 that is not connected to the power supply circuit, Figure 3 In this embodiment, two schemes are used to recover the electric energy generated by the photovoltaic panel 1 that is not connected to the power supply circuit.

[0101] In one solution of this embodiment, the photovoltaic panel 1 is provided with a pluggable battery 5 interface;

[0102] The outside of the battery 5 interface is equipped with an openable and closable baffle;

[0103] The battery 5 interface is connected to the battery 5 through the battery 5 charging line when the baffle is opened.

[0104] In this solution, a pluggable battery 5 port can be configured on the side of the photovoltaic panel 1, and a retractable baffle can be configured outside the battery 5 port. When the battery 5 is not needed to recover energy, the baffle is closed to prevent the battery 5 port from being exposed and causing wear. When the battery 5 is needed to recover energy, the baffle is opened, and the battery 5 is connected to the battery 5 port via the battery 5 charging cable to recover energy.

[0105] In another solution of this embodiment, the photovoltaic panel 1 is equipped with a digitally controlled switch;

[0106] The digital control switch is connected to the battery 5 via the power transmission line 3 .

[0107] In this solution, a digital control switch can also be configured on the side or bottom of the photovoltaic panel 1. The digital control switch is always connected to the battery 5 through the transmission line 3. When it is not necessary to recover electric energy through the battery 5, the connection between the photovoltaic panel 1 and the battery 5 is directly disconnected through the digital control switch. When it is necessary to recover electric energy through the battery 5, the connection between the photovoltaic panel 1 and the battery 5 is directly opened through the digital control switch.

[0108] Example 5

[0109] Reference Figure 4 , a back contact battery cascade structure used in system power modules, also includes:

[0110] First-level power generation detection circuit 6;

[0111] The primary power generation detection circuit 6 is connected to the transmission line 3 between the coaxial switch 2 at the end of the queue and the system power supply module;

[0112] The first-level power generation detection circuit 6 includes: a first-level current sensor, a first-level voltage sensor, a first-level data acquisition chip and a first-level display screen;

[0113] The primary current sensor and the primary voltage sensor are used to detect the total voltage and current values ​​transmitted by the photovoltaic panel 1 to the system power supply module, and send the total voltage and current values ​​to the primary data acquisition chip;

[0114] The primary data acquisition chip displays the total voltage and current values ​​transmitted from the photovoltaic panel 1 to the system power supply module through the primary display screen.

[0115] Furthermore, it also includes:

[0116] Temperature sensor 7;

[0117] The temperature sensor 7 is provided on the transmission line 3 between the coaxial switch 2 at the end of the queue and the system power supply module, and is used to detect the temperature value of the transmission line 3 between the coaxial switch 2 at the end of the queue and the system power supply module, and send the detected temperature value to the primary data acquisition chip;

[0118] The primary data acquisition chip displays the temperature value detected by the temperature sensor 7 through the primary display screen.

[0119] In this embodiment, a primary current sensor and a primary voltage sensor are also used to detect the total voltage value and total current value transmitted by the photovoltaic panel 1 to the system power supply module, and the total voltage value and total current value transmitted by the photovoltaic panel 1 to the system power supply module are displayed on the primary display screen, so that the staff can clearly and intuitively judge whether the total voltage value and total current value in the current power transmission meet the standards.

[0120] In this embodiment, a temperature sensor 7 is also used to detect the temperature of the transmission line 3 between the coaxial switch 2 at the end of the queue and the system power supply module, and the temperature is displayed on the primary display screen. This allows staff to understand the temperature of the transmission line 3 in real time and prevent burns caused by excessive temperatures.

[0121] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0122] It should be noted that, in the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0123] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0124] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A back contact battery cascade structure applied to a system power supply module, characterized in that: include: Multiple photovoltaic panels, multiple coaxial switches, and multiple transmission lines; The photovoltaic panel includes a plurality of back contact cells; Back contact cells in the same photovoltaic panel are only connected in series or only connected in parallel; Multiple photovoltaic panels form a queue, and multiple coaxial switches form a queue; The coaxial switch includes at least two input terminals and at least two output terminals; The first input end and the first output end of the coaxial switch are respectively connected to two adjacent photovoltaic panels in the queue; The first end and the second end of the transmission line are respectively connected to the second output end and the second input end of two adjacent coaxial switches in the queue; The output end of the coaxial switch at the end of the queue is connected to the system power supply module through a transmission line.

2. The back contact battery cascade structure applied to the system power supply module according to claim 1, characterized in that: The number of back contact cells in different photovoltaic panels may be the same or different.

3. The back contact battery cascade structure applied to the system power supply module according to claim 2, characterized in that: Photovoltaic panels with the same number of back contact cells are placed in adjacent positions in the queue.

4. The back contact battery cascade structure applied to the system power supply module according to claim 3, characterized in that: Photovoltaic panels with the same back contact cell connection method are placed in adjacent positions in the queue.

5. The back contact battery cascade structure applied to the system power supply module according to claim 2, characterized in that: Also includes: Multiple signage; The signboards correspond to the photovoltaic panels one by one; The indicator board is arranged on the side of the photovoltaic power generation panel and is used to record and indicate the voltage value and current value of the photovoltaic power generation panel.

6. The back contact battery cascade structure applied to the system power supply module according to claim 2, characterized in that: Also includes: Multiple secondary power generation detection circuits; The secondary power generation detection circuit corresponds to the photovoltaic power generation panel in a one-to-one manner; The secondary power generation detection circuit includes: a secondary current sensor, a secondary voltage sensor, a secondary data acquisition chip and a secondary display screen; The secondary display screen is arranged on the side of the photovoltaic power generation panel; The secondary current sensor and the secondary voltage sensor are used to detect the voltage and current values ​​of the photovoltaic panel, and send the voltage and current values ​​of the photovoltaic panel to the secondary data acquisition chip; The secondary data acquisition chip displays the voltage value and current value of the photovoltaic power generation panel through the secondary display screen.

7. The back contact battery cascade structure applied to the system power supply module according to claim 1, characterized in that: The photovoltaic power generation panel is equipped with a pluggable battery interface; An openable and closable baffle is provided on the outside of the battery interface; The battery interface is connected to the battery through the battery charging line when the baffle is opened.

8. The back contact battery cascade structure applied to the system power supply module according to claim 1, characterized in that: The photovoltaic power generation panel is equipped with a digital control switch; The digital control switch is connected to the battery via a power transmission line.

9. The back contact battery cascade structure applied to the system power supply module according to claim 1, characterized in that: Also includes: First-level power generation detection circuit; The primary power generation detection circuit is connected to the transmission line between the coaxial switch at the end of the queue and the system power supply module; The first-level power generation detection circuit includes: a first-level current sensor, a first-level voltage sensor, a first-level data acquisition chip and a first-level display screen; The primary current sensor and the primary voltage sensor are used to detect the total voltage and total current values ​​transmitted by the photovoltaic power generation panel to the system power supply module, and send the total voltage and total current values ​​to the primary data acquisition chip; The first-level data acquisition chip displays the total voltage value and total current value transmitted by the photovoltaic power generation panel to the system power supply module through the first-level display screen.

10. The back contact battery cascade structure applied to the system power supply module according to claim 9, characterized in that: Also includes: Temperature sensor; The temperature sensor is arranged on the power transmission line between the coaxial switch at the end of the queue and the system power supply module, and is used to detect the temperature value of the power transmission line between the coaxial switch at the end of the queue and the system power supply module, and send the detected temperature value to the primary data acquisition chip; The primary data acquisition chip displays the temperature value detected by the temperature sensor through the primary display screen.

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