Laminated photovoltaic module and photovoltaic power station

Abstract

The utility model discloses a laminated photovoltaic assembly and a photovoltaic power station. The laminated photovoltaic assembly comprises a plurality of battery assemblies which are arranged in a laminated manner, and each battery assembly comprises a positive electrode and a negative electrode; the insulating layers are arranged between every two adjacent battery assemblies; each optimization circuit is connected in series with the positive electrode and the negative electrode of one battery assembly, and each optimization circuit is connected in series with different battery assemblies; and the optimization circuit is used for regulating and controlling the output voltage of the laminated photovoltaic module and the current of the battery module connected with the laminated photovoltaic module. Each layer of battery assembly in the laminated photovoltaic assembly can work under respective power, and the conversion efficiency of the laminated photovoltaic assembly can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a laminated photovoltaic component and a photovoltaic power station. Background Art

[0002] In order to improve the light utilization rate and photoelectric conversion efficiency of photovoltaic modules, laminated photovoltaic modules are becoming more and more popular in the market. However, due to the performance difference between the upper and lower components in the laminated photovoltaic modules, if the upper and lower components in the laminated photovoltaic modules are directly connected to the external load, in order to make the upper and lower components provide equal voltage to the external load, it is difficult to work at the optimal power, which affects the efficiency of the laminated photovoltaic modules.

[0003] In order to overcome the above-mentioned problems existing in the existing laminated photovoltaic modules, in the prior art (CN106298998A), it is designed to connect the upper and lower components in parallel, and connect the parallel circuits in series to the same tracking module, and provide a stable voltage to the external load through the boost circuit in the tracking module, so that the laminated photovoltaic modules can provide a stable voltage to the external load and are no longer affected by ground weather changes.

[0004] However, the prior art does not consider the optimal power of each layer of components in the laminated photovoltaic module, resulting in that each layer of components cannot work at its optimal power, affecting the conversion efficiency of the laminated photovoltaic module. Utility Model Content

[0005] In view of this, the utility model provides a laminated photovoltaic module and a photovoltaic power station. The battery modules of each layer in the laminated photovoltaic module can work at their own power, which can effectively improve the conversion efficiency of the laminated photovoltaic module.

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

[0007] In a first aspect, the utility model provides a laminated photovoltaic module, comprising:

[0008] A plurality of stacked battery assemblies, wherein each of the battery assemblies comprises a positive electrode and a negative electrode;

[0009] An insulating layer disposed between each two adjacent battery assemblies;

[0010] A plurality of optimization circuits, wherein each of the optimization circuits is connected in series with a positive electrode and a negative electrode of the battery assembly, and each of the optimization circuits is connected in series with a different battery assembly;

[0011] The optimization circuit is used to regulate the output voltage of the laminated photovoltaic module and the current of the battery module connected thereto.

[0012] In a second aspect, an embodiment of the utility model provides a photovoltaic power station, comprising: a plurality of laminated photovoltaic modules provided by the embodiment of the first aspect above, wherein:

[0013] A plurality of the stacked photovoltaic modules are connected in series.

[0014] The technical solution of the first aspect of the above utility model has the following advantages or beneficial effects:

[0015] Each battery assembly included in the stacked photovoltaic module provided by the embodiment of the utility model is connected in series with an independent optimization circuit. The battery assemblies connected in series can be regulated by the optimization circuit, so that not only the output voltage of each battery assembly can be regulated, but also each battery assembly in the stacked photovoltaic module can be independently controlled to avoid mutual interference between the battery assemblies. Each battery assembly can work at its optimal power, effectively improving the conversion efficiency of the stacked photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the first structure of a laminated photovoltaic module according to an embodiment of the utility model;

[0017] Figure 2 is a schematic diagram of a second structure of a laminated photovoltaic module according to an embodiment of the utility model;

[0018] Figure 3 This is a third structural schematic diagram of a laminated photovoltaic module according to an embodiment of the utility model;

[0019] Figure 4 is a fourth structural schematic diagram of a laminated photovoltaic module according to an embodiment of the utility model;

[0020] Figure 5 is a schematic structural diagram of a step-down conversion circuit according to an embodiment of the utility model;

[0021] Figure 6 is a fifth structural schematic diagram of a laminated photovoltaic module according to an embodiment of the utility model;

[0022] Figure 7 It is a schematic diagram of the main process of the method for preparing a laminated photovoltaic module according to an embodiment of the utility model;

[0023] Figure 8 It is a structural schematic diagram of a photovoltaic power station according to an embodiment of the utility model.

[0024] The reference numerals are as follows:

[0025] 1-laminated photovoltaic module; 10-battery module; 20-insulating layer; 30-optimization circuit; 31-sampling circuit; 32-step-down conversion circuit; 321-switch tube; 322-diode; 323-voltage stabilizing circuit; 3231-inductor; 3232-first capacitor; 324-current output terminal; 33-logic processing module; 40-second capacitor; 50-optimizer; 6-photovoltaic inverter. DETAILED DESCRIPTION

[0026] The laminated photovoltaic modules involved in the embodiments of the present invention are generally independent battery modules stacked up and down, wherein each independent battery module has an independent positive electrode, negative electrode, light absorption layer, passivation anti-reflection layer, etc., which can support the battery module to independently operate various functional layers.

[0027] The laminated photovoltaic module involved in the embodiment of the utility model generally contains at least two layers of battery modules. For example, the laminated photovoltaic module can be a two-layer battery module, a three-layer battery module, a four-layer battery module, etc. That is, the number of battery modules contained in the laminated photovoltaic module can be any number.

[0028] The stacking arrangement involved in the embodiments of the present invention generally refers to a structure stacked on top of or below another structure, and the structure may be in direct or indirect contact with the main surface of the other structure. Direct contact generally refers to the one structure being directly formed, grown, or deposited on the upper or lower surface of the other structure; indirect contact generally refers to the other functional layers or non-functional layers being formed between the one structure and the other structure.

[0029] The upper surface or front surface of a structure involved in the embodiments of the utility model generally refers to a main surface of the structure facing the sunlight or upward during the use of the solar cell; the lower surface or back surface of a structure generally refers to a main surface of the structure facing away from the sunlight or downward during the use of the solar cell. Among them, the upper surface and the lower surface or the front and the back surface of a structure are opposite to each other.

[0030] The electrical connection between one structure and another structure involved in the embodiments of the utility model generally means that the structure is directly or indirectly connected to the other structure, and current can flow from the one structure to the other structure or from the other structure to the one structure. Among them, the direct connection between one structure and another structure means that the one structure and the other structure are directly connected through a wire. The indirect connection between one structure and another structure means that other electronic components are arranged between the one structure and the other structure, and the one structure and the other structure are connected to the electronic components through wires, and the one structure and the other structure are connected through the connected electronic components.

[0031] The "first" and "second" etc. involved in the embodiments of the present invention are used to distinguish different structures or components or different positions of the same structure, and are not intended to limit the number, order, etc. of structures or components. For example, the first capacitor and the second capacitor involved in the embodiments of the present invention are generally used to distinguish two capacitors that are located at different positions and have certain differences in connection structures.

[0032] The embodiments of the utility model improve the design of laminated photovoltaic modules to solve the problems of different photoelectric conversion efficiency of each battery module, inconsistent attenuation speed of each battery module, current mismatch, low yield rate of laminated photovoltaic modules, etc.

[0033] in, Figures 1 to 4 as well as Figure 6 A partial structural schematic diagram of a laminated photovoltaic assembly provided by an embodiment of the utility model is shown; Figure 5 A partial structural schematic diagram of a buck conversion circuit applied to a laminated photovoltaic module provided by an embodiment of the utility model is shown.

[0034] like Figures 1 to 4 as well as Figure 6 As shown, the embodiment of the utility model provides a laminated photovoltaic module 1. The laminated photovoltaic module 1 may include:

[0035] A plurality of stacked battery assemblies 10, wherein each battery assembly 10 includes a positive electrode and a negative electrode;

[0036] An insulating layer 20 disposed between every two adjacent battery assemblies 10;

[0037] A plurality of optimization circuits 30, wherein each optimization circuit 30 is connected in series with the positive electrode and the negative electrode of a battery assembly 10, and each optimization circuit 30 is connected in series with different battery assemblies 10;

[0038] The optimization circuit 30 is used to regulate the output voltage of the laminated photovoltaic module and the current of the battery module 10 connected thereto.

[0039] Each optimization circuit 30 independently controls the battery assembly 10 connected in series. Specifically, the optimization circuit 30 can not only make the battery assembly 10 connected in series work at the optimal power, but also control the output voltage of the battery assembly 10, and can adjust the optimal working current based on the optimal power and the actual working voltage of the battery assembly. The optimization circuits 30 do not interfere with each other.

[0040] The insulating layer 20 is generally a glass plate. The glass plate can completely block the electrical contact between adjacent battery assemblies 10, ensuring that the adjacent battery assemblies 10 are completely electrically isolated. In the case where the lower battery assembly 10 of two adjacent battery assemblies is a crystalline silicon battery assembly, the glass plate is the cover plate of the crystalline silicon battery assembly, that is, the insulating layer 20 is a part of the crystalline silicon battery assembly, and there is no need to design an insulating layer 20 separately between the two adjacent battery assemblies 10. In the case where the lower battery assembly 10 of two adjacent battery assemblies is an amorphous silicon battery assembly such as a thin-film battery assembly, a perovskite battery assembly, etc., the glass plate is an insulating layer 20 designed separately from the two adjacent battery assemblies 10.

[0041] Research has found that in the prior art, two adjacent battery assemblies are electrically isolated using EVA materials. EVA will melt and have fluidity during the high temperature process of lamination, so the use of EVA materials as an insulating layer has the risk of conduction between two adjacent battery assemblies. The glass plate provided in the embodiment of the utility model is used as the structure of the insulating layer 20. It is not a stack of layers of battery assemblies, but the upper battery assembly is made after the bottom battery assembly 10 is packaged. Moreover, the risk of conduction between two adjacent battery assemblies is eliminated through the glass plate.

[0042] Generally speaking, for the battery assembly 10 involved in the embodiment of the utility model, the positive electrode and the negative electrode included therein may be located on one main surface of the battery assembly 10, such as the front or back surface, or may be separately arranged on the two main surfaces of the battery assembly 10. Preferably, the positive electrode and the negative electrode included in the battery assembly 10 involved in the embodiment of the utility model are separately arranged on the front and back surfaces of the battery assembly 10. That is, the positive electrode included in the battery assembly 10 is located on the front surface of the battery assembly 10, and the negative electrode included in the battery assembly 10 is located on the back surface of the battery assembly 10; or, the negative electrode included in the battery assembly 10 is located on the front surface of the battery assembly 10, and the positive electrode included in the battery assembly 10 is located on the back surface of the battery assembly 10.

[0043] The optimization circuit 30 generally regulates the output voltage of the laminated photovoltaic module by ensuring that the battery module 10 connected thereto is at the optimal power and reducing the voltage of the battery module 10. By reducing the voltage of the battery module 10, the battery module 10 outputs a relatively high current, reducing the impact of the laminated photovoltaic module on other laminated photovoltaic modules connected in series, so that when any battery module has problems such as being blocked, the output current and output power of the photovoltaic power station where the laminated photovoltaic module is located can still be effectively improved.

[0044] As shown above, the laminated photovoltaic module provided in the embodiment of the utility model may include two or more stacked cell modules 10. Among them, the absorption spectra of each cell module 10 are different to ensure the utilization rate of light by the overall structure of the laminated photovoltaic module, and to ensure the light utilization rate and photoelectric conversion efficiency of the cell module 10. In a preferred embodiment, the above-mentioned laminated photovoltaic module includes two cell modules 10. In a more preferred embodiment, the multiple stacked cell modules 10 are a perovskite cell module located on the upper layer and a crystalline silicon cell module located on the lower layer. In the embodiment of the utility model, the perovskite cell module is designed and adjusted to mainly absorb short waves, and the crystalline silicon cell module 12 mainly absorbs long waves, so as to better improve the utilization rate of sunlight and the photoelectric conversion efficiency.

[0045] In the stacked photovoltaic module provided in the embodiment of the utility model, each battery module is connected in series with an independent optimization circuit, and the battery modules connected in series can be regulated by the optimization circuit, so that not only the output voltage of each battery module can be regulated, but also each battery module in the stacked photovoltaic module can be independently controlled to avoid mutual interference between the battery modules. Each battery module can work at its optimal power, effectively improving the conversion efficiency of the stacked photovoltaic module.

[0046] In addition, according to the structural design of the laminated photovoltaic module provided by the embodiment of the utility model, each optimization circuit can independently regulate the battery module connected in series to have the best operating current at the best power, so that the battery module can achieve the maximum light conversion efficiency.

[0047] Furthermore, when the attenuation rates of various battery components are different, since each battery component operates at the optimal power and optimal operating current under the control of its optimized circuit, the battery components do not affect each other, and as time goes by, the conversion efficiency of each battery component can still be guaranteed to be in the optimal state.

[0048] In addition, each optimization circuit can independently regulate the output voltage of the battery assembly connected in series and the current of the battery assembly 10 to which it is connected, thereby ensuring that the output voltage and output circuit of each battery assembly 10 match each other.

[0049] In the embodiment of the utility model, by designing an insulating layer 20 between adjacent battery assemblies 10, electrical connection between adjacent battery assemblies 10 can be avoided, the yield of the stacked photovoltaic assembly can be effectively improved, the waste of battery assemblies 10 can be avoided, and the production cost of the stacked photovoltaic assembly can be effectively reduced.

[0050] Specifically, Figures 2 to 4 As shown, the optimization circuit includes: a sampling circuit 31 and a buck conversion circuit 32, wherein:

[0051] The sampling circuit 31 is electrically connected to a battery assembly 10 and is used to collect the current and voltage of the battery assembly;

[0052] The step-down conversion circuit 32 is electrically connected to the battery assembly 10 and is used to adjust the output voltage of the battery assembly 10 according to the current and voltage collected by the sampling circuit 31 .

[0053] Among them, the sampling circuit 31 can be electrically connected to the battery assembly 10 through a signal line or a current wire. The sampling circuit 31 can include electronic components such as a voltage detection sensor, a current detection sensor, and in addition to the voltage detection sensor and the current detection sensor, it can also include other electronic components. The specific structure of the sampling circuit 31 can be designed according to the existing sampling circuit, and is not specifically limited here. Among them, the sampling circuit 31 and the battery assembly 10 can be electrically connected by the sampling circuit 31 directly connecting the positive and negative electrodes of the battery assembly 10 through a wire, or by the sampling circuit 31 connecting to the junction box to which the electrodes of the battery assembly 10 are connected through a wire. In addition, other electronic components can be arranged between the battery assembly 10 and the sampling circuit 31, and the design of other electronic components between the battery assembly 10 and the sampling circuit 31 is not limited here.

[0054] In the case where the sampling circuit 31 is electrically connected to the battery assembly 10 via a signal line, the step-down conversion circuit 32 and the battery assembly 10 are directly electrically connected to the positive and negative electrodes of the battery assembly 10 via wires.

[0055] In the case where the sampling circuit 31 is electrically connected to the battery assembly 10 through a wire, the sampling circuit 31 is disposed on a circuit between the battery assembly 10 and the step-down conversion circuit 32 .

[0056] The step-down conversion circuit 32 regulates the output voltage of the battery assembly 10 so that the output voltage of each battery assembly 10 can be kept consistent, thereby ensuring that the stacked photovoltaic assembly outputs a stable voltage.

[0057] Among them, Figure 5 As shown, the buck conversion circuit 32 may include: a switch tube 321, a diode 322, a voltage stabilizing circuit 323 and a current output terminal 324, wherein:

[0058] The input end of the switch tube 321 is electrically connected to the positive electrode of the battery assembly 10;

[0059] The diode 322 and the voltage stabilizing circuit 323 are connected in parallel;

[0060] The output end of the switch tube 321 is connected to the cathode of the diode 322 and the input end of the voltage stabilizing circuit 323 respectively;

[0061] The positive electrode of the diode 322 and the output end of the voltage stabilizing circuit 323 are electrically connected to the negative electrode of the battery assembly 10;

[0062] The current output terminal 324 is connected to the voltage stabilizing circuit 323 and is used to output the current stabilized by the voltage stabilizing circuit 323 .

[0063] In the embodiment of the utility model, the working principle of the step-down converter circuit 32 is as follows: when the input and output ends of the switch tube 321 are in the on state, the diode 322 is in the off state, the current is stored through the voltage stabilizing circuit 323, and the current is output to the current output end 324. When the input and output ends of the switch tube 321 are in the off state, the voltage stabilizing circuit 323 discharges, the diode 322 is turned on, and the current is output to the current output end 324.

[0064] The step-down converter circuit 32 provided in the embodiment of the utility model controls the output voltage of the current output terminal 324 by controlling the on-off of the switch tube 321 , and ensures the stability of the output voltage through the voltage stabilizing circuit 323 and the diode 322 .

[0065] Among them, the voltage stabilizing circuit 323 may include: an inductor 3231 and a first capacitor 3232, wherein the input end of the inductor 3231 is electrically connected to the output end of the switch tube 321; the inductor 3231 is connected in parallel with the current output end 324, and the output end of the inductor 3231 is electrically connected to the input end of the first capacitor 3232, and the output end of the first capacitor 3232 is electrically connected to the positive electrode of the diode 322 and the negative electrode of the battery assembly 10.

[0066] The working principle of the combination of the inductor 3231 and the first capacitor 3232 in the voltage stabilizing circuit 323, the switch tube 321 and the diode 322 is as follows: when the input and output ends of the switch tube 321 are in the on state, the diode 322 is in the off state, the current passes through the inductor 3231, and transmits the current to the first capacitor 3232 for energy storage, and outputs the current to the current output end 324, and the first capacitor 3232 achieves the purpose of stabilizing the voltage of the current output end 324. When the input and output ends of the switch tube 321 are in the off state, the first capacitor 3232 releases electric energy, the diode 322 is turned on, and the current passes through the diode 322 and the inductor 3231 in sequence, and is output to the current output end 324, ensuring the stability of the output voltage.

[0067] The on or off of the switch tube 321 in the buck converter circuit 32 can be controlled by a logic processing chip in the buck converter circuit 32 , or can be implemented by a logic processing module independent of the buck converter circuit 32 .

[0068] Whether the logic processing chip in the buck converter circuit 32 controls the on or off of the switch tube 321, or the logic processing module independent of the buck converter circuit 32 controls the on or off of the switch tube 321, the implementation principle is basically the same. The specific process of controlling the on or off of the switch tube 321 will be described in detail below by taking the logic processing module independent of the buck converter circuit 32 as an example.

[0069] Regarding controlling the on or off of the switch tube 321 by a logic processing module independent of the buck converter circuit 32, further, as Figure 3 and Figure 4 As shown, the above optimization circuit 30 may further include: a logic processing module 33, wherein:

[0070] The logic processing module 33 is electrically connected to the step-down conversion circuit 32, and is used to generate a pulse signal according to the reference voltage of the laminated photovoltaic module, and output the pulse signal to the step-down conversion circuit 32;

[0071] The step-down conversion circuit 32 is further used to adjust the output voltage of the battery assembly 10 according to the pulse signal, wherein the output voltage is equal to or close to the reference voltage.

[0072] The pulse signal is used to control the on or off of the switch tube 321 .

[0073] The pulse signal is generally a pulse signal based on pulse width modulation (PWM), which can affect the on and off of the switch tube 321. The off time Toff of the switch tube 321 plus the on time Ton is one cycle of the pulse signal. The ratio of the on time Ton of the switch tube to the entire switch cycle is defined as the duty cycle D. According to the volt-second balance principle of the inductor 3231, the output voltage U of the current output terminal 324 is obtained. R =D*U in Among them, U R represents the output voltage of the current output terminal 324; D represents the duty cycle of the step-down converter circuit 32; U in Indicates the input voltage of the buck converter circuit 32 (the input voltage of the buck converter circuit 32 is actually the actual voltage input to the buck converter circuit 32 by the battery assembly 10). In other words, the embodiment of the utility model adjusts the switch duty cycle D through the logic processing module 33 to achieve the purpose of intelligently adjusting the output voltage.

[0074] Specifically, for the structure in which the step-down conversion circuit 32 includes the switch tube 321, the logic processing module 33 is connected to the control end of the switch tube 321, and is used to output the pulse signal to the control end of the switch tube 321; the control end of the switch tube 321 is used to control the connection or disconnection between the input end and the output end of the switch tube 321 according to the pulse signal. The step-down conversion circuit 32 is intelligently controlled to achieve the purpose of regulating the output voltage.

[0075] Furthermore, in order to further ensure that the battery assembly 10 operates at optimal power, the above-mentioned logic processing module 33 is electrically connected to the sampling circuit 31, and is used to obtain the voltage and current collected by the sampling circuit 31, and track the optimal power of the battery assembly 10 in real time; specifically, the real-time tracking of the optimal power of the battery assembly 10 can be achieved by using Maximum Power Point Tracking (MPPT) technology.

[0076] The logic processing module 33 is further used to regulate the current of the battery assembly 10 according to the optimal power of the battery assembly 10 and the reference voltage of the laminated photovoltaic assembly. The reference voltage of the laminated photovoltaic assembly can be preset or determined based on the voltage collected in real time by the sampling circuit 31 corresponding to each battery assembly 10 included in the laminated photovoltaic assembly.

[0077] In a preferred embodiment, the logic processing module 33 is further used to obtain the voltage collected by the sampling circuit 31 in each optimization circuit 30, and determine the reference voltage of the laminated photovoltaic module according to the collected voltage. Among them, the reference voltage is the minimum voltage of each battery assembly 10 collected in real time. That is, the minimum voltage is used as the reference voltage, that is, the output voltage is adjusted by the buck conversion circuit 32 to output according to the reference voltage, so that the output voltage is the voltage after the buck conversion circuit 32 is stepped down, and the battery assembly 10 is guaranteed to have a relatively high output current by reducing the voltage. In other words, even if any battery assembly 10 in the laminated photovoltaic assembly has a problem such as being blocked, the output voltage is reduced by adjusting the buck conversion circuit 32, and when the battery assembly 10 is controlled by the logic processing module 33 to work at the optimal power, the output current is increased to reduce the impact on each laminated photovoltaic assembly connected in series in the photovoltaic power station.

[0078] In addition, in addition to the above-mentioned independent provision of a logic processing module 33 for each battery assembly 10, each battery assembly 10 in the same laminated photovoltaic assembly can also share the same logic processing module. In the case where each battery assembly 10 shares the same logic processing module, the logic processing module still uses independent logic control for each battery assembly 10, that is, the logic processing module will independently control the buck conversion circuit 32 of each battery assembly 10, and the control logic of each buck conversion circuit 32 does not affect each other.

[0079] Furthermore, if Figure 4 As shown, the laminated photovoltaic module may also include: a second capacitor 40 connected in series with the plurality of optimization circuits 30;

[0080] The second capacitor 40 is connected in parallel with the external load.

[0081] The external load may be a photovoltaic inverter 6 in a photovoltaic power station.

[0082] The output voltage of the laminated photovoltaic module can be further stabilized by the second capacitor 40 .

[0083] Furthermore, if Figure 5 As shown, the laminated photovoltaic module may further include: an optimizer 50, wherein:

[0084] The optimizer 50 includes: a housing for encapsulating a plurality of optimization circuits 30 and a connection interface, wherein:

[0085] The electrode lead-out terminals of each battery assembly 10 are electrically connected to an optimization circuit 30 via a connection interface.

[0086] The optimizer 50 uniformly manages multiple optimization circuits 30, making it convenient to connect the optimization circuits 30 with the battery assembly 10.

[0087] In addition, each optimization circuit 30 can be respectively arranged in the junction box of the battery assembly 10 to which it is connected.

[0088] Furthermore, the present invention also provides a method for preparing a laminated photovoltaic module according to any of the above embodiments. Figure 7 As shown, the preparation method may include the following steps:

[0089] Step S701: prepare the bottom battery assembly 10; when the upper surface of the bottom battery assembly 10 is a non-insulating layer, proceed to step S702; when the upper surface of the bottom battery assembly 10 is an insulating layer 20, directly proceed to step S703;

[0090] Step S702: Laying an insulating layer 20 on the upper surface of the bottom battery assembly 10;

[0091] Step S703: preparing an upper battery assembly 10 on the insulating layer 20;

[0092] Step S704 : Connect the corresponding optimization circuit 30 in series to each battery assembly 10 .

[0093] Through this preparation method, each battery component has an independent optimization circuit 30, and the optimization circuit 30 independently controls the voltage of the battery component to which it is connected, so that each battery component can independently operate at its own optimal power to ensure the attenuation of each battery component, ensure that each battery component is matched, and improve the photoelectric conversion efficiency of the stacked photovoltaic component.

[0094] Furthermore, the embodiment of the utility model provides a photovoltaic power station. Figure 8 As shown, the photovoltaic power station may include: a plurality of laminated photovoltaic modules 1 provided by any of the above embodiments, wherein:

[0095] A plurality of laminated photovoltaic modules 1 are connected in series.

[0096] Specifically, a plurality of stacked photovoltaic modules 1 are connected in series via the optimizer 50 included therein.

[0097] Furthermore, if Figure 8 As shown, the above photovoltaic power station may further include: a photovoltaic inverter 6, wherein:

[0098] The photovoltaic inverter 6 is connected to a plurality of laminated photovoltaic modules 1 connected in series and provides electric energy to an external power grid.

[0099] Each stacked photovoltaic module 1 in the photovoltaic power station uses the lower voltage of the battery module 10 in the stacked photovoltaic module 1 as a reference voltage to control the output voltage, so that the output current of each battery module 10 in the stacked photovoltaic module 1 can be increased. Since the stacked photovoltaic modules 1 and the stacked photovoltaic modules 1 in the photovoltaic power station are connected in series, the current consistency can be ensured as much as possible by increasing the current. Since the output current of each stacked photovoltaic module 1 after series connection is the minimum current of the stacked photovoltaic module 1, the voltage is reduced and the current is increased to effectively increase the overall current output of the photovoltaic power station, thereby effectively increasing the output electrical power of the photovoltaic power station.

[0100] In summary, the embodiments of the present invention provide the following technical solutions:

[0101] Technical solution 1, a laminated photovoltaic module, comprising:

[0102] A plurality of stacked battery assemblies 10, wherein each of the battery assemblies 10 includes a positive electrode and a negative electrode;

[0103] An insulating layer 20 disposed between each two adjacent battery assemblies 10;

[0104] A plurality of optimization circuits 30, wherein each optimization circuit 30 is connected in series with a positive electrode and a negative electrode of a battery assembly 10, and each optimization circuit 30 is connected in series with a different battery assembly 10;

[0105] The optimization circuit 30 is used to regulate the output voltage of the laminated photovoltaic module and the current of the battery module 10 connected thereto.

[0106] Technical Solution 2: According to the laminated photovoltaic module described in Technical Solution 1, the optimization circuit includes: a sampling circuit 31 and a buck conversion circuit 32, wherein:

[0107] The sampling circuit 31 is electrically connected to one of the battery assemblies 10 and is used to collect the current and voltage of the battery assembly;

[0108] The step-down conversion circuit 32 is electrically connected to the battery assembly 10 , and is used to adjust the output voltage of the battery assembly 10 according to the current and voltage collected by the sampling circuit 31 .

[0109] Technical Solution 3: According to the laminated photovoltaic module described in Technical Solution 2, the step-down conversion circuit 32 includes: a switch tube 321, a diode 322, a voltage stabilizing circuit 323 and a current output terminal 324, wherein:

[0110] The input end of the switch tube 321 is electrically connected to the positive electrode of the battery assembly 10;

[0111] The diode 322 and the voltage stabilizing circuit 323 are connected in parallel;

[0112] The output end of the switch tube 321 is connected to the cathode of the diode 322 and the input end of the voltage stabilizing circuit 323 respectively;

[0113] The positive electrode of the diode 322 and the output end of the voltage stabilizing circuit 323 are electrically connected to the negative electrode of the battery assembly 10;

[0114] The current output terminal 324 is connected to the voltage stabilizing circuit 323 and is used to output the current stabilized by the voltage stabilizing circuit 323 .

[0115] Technical Solution 4: According to the laminated photovoltaic module of Technical Solution 2 or 3, the optimization circuit further includes: a logic processing module 33, wherein:

[0116] The logic processing module 33 is electrically connected to the step-down conversion circuit 32, and is used to generate a pulse signal according to the reference voltage of the laminated photovoltaic module and the current and voltage collected by the collection circuit 31, and output the pulse signal to the step-down conversion circuit 32;

[0117] The step-down conversion circuit 32 is further used to adjust the output voltage of the battery assembly 10 according to the pulse signal.

[0118] Technical solution 5: The laminated photovoltaic module according to technical solution 4,

[0119] With respect to the structure of the step-down conversion circuit 32 including the switch tube 321,

[0120] The logic processing module 33 is connected to the control end of the switch tube 321, and is used to output the pulse signal to the control end of the switch tube 321;

[0121] The control end of the switch tube 321 is used to control the connection or disconnection between the input end and the output end of the switch tube 321 according to the pulse signal.

[0122] Technical solution 6: The laminated photovoltaic module according to technical solution 4,

[0123] The logic processing module 33 is electrically connected to the sampling circuit 31 and is used to obtain the voltage and current collected by the sampling circuit 31 and track the optimal power of the battery assembly 10 in real time;

[0124] The logic processing module 33 is further used to regulate the current of the battery assembly 10 according to the optimal power of the battery assembly 10 and the reference voltage of the laminated photovoltaic assembly.

[0125] Technical solution 7: The laminated photovoltaic module according to technical solution 4,

[0126] The logic processing module 33 is further used to obtain the voltage collected by the sampling circuit 31 in each of the optimization circuits 30, and determine the reference voltage of the laminated photovoltaic module according to the collected voltage.

[0127] Technical Solution 8: According to the laminated photovoltaic module described in Technical Solution 3, the voltage stabilizing circuit 323 includes: an inductor 3231 and a first capacitor 3232, wherein:

[0128] The input end of the inductor 3231 is electrically connected to the output end of the switch tube 321;

[0129] The inductor 3231 is connected in parallel with the current output terminal 324 , and the output terminal of the inductor 3231 is electrically connected to the input terminal of the first capacitor 3232 , and the output terminal of the first capacitor 3232 is electrically connected to the positive electrode of the diode 322 and the negative electrode of the battery assembly 10 .

[0130] Technical solution 9: The laminated photovoltaic module according to any one of technical solutions 1 to 3 and 5 to 8, further comprising: a second capacitor 40 connected in series with the plurality of optimization circuits 30;

[0131] The second capacitor 40 is connected in parallel with the external load.

[0132] Technical solution 10: The laminated photovoltaic module according to any one of technical solutions 1 to 3 and 5 to 7 further includes: an optimizer 50, wherein:

[0133] The optimizer 50 includes: a housing for encapsulating a plurality of the optimization circuits 30 and a connection interface, wherein:

[0134] The electrode lead-out terminal of each of the battery assemblies 10 is electrically connected to one of the optimization circuits 30 via the connection interface.

[0135] Technical solution 11: A laminated photovoltaic module according to any one of technical solutions 1 to 3 and 5 to 8,

[0136] The insulating layer 20 is a glass plate;

[0137] and / or,

[0138] The positive electrode and the negative electrode included in the battery assembly 10 are respectively arranged on the front and back sides of the battery assembly 10;

[0139] and / or,

[0140] The plurality of stacked battery components 10 are a perovskite battery component located at an upper layer and a crystalline silicon battery component located at a lower layer.

[0141] Technical solution 12: A laminated photovoltaic module according to any one of technical solutions 1 to 3 and 5 to 8,

[0142] Each of the optimization circuits 30 is respectively disposed in a junction box of the battery assembly 10 to which it is connected.

[0143] Technical solution 13, a photovoltaic power station, comprising: a plurality of laminated photovoltaic modules 1 according to any one of technical solutions 1 to 12, wherein:

[0144] A plurality of the laminated photovoltaic modules 1 are connected in series.

[0145] Technical solution 14: The photovoltaic power station according to technical solution 13,

[0146] A plurality of the stacked photovoltaic modules 1 are connected in series via the optimizer 50 included therein.

[0147] Technical solution 15. The photovoltaic power station according to technical solution 14 further includes: a photovoltaic inverter 6, wherein:

[0148] The photovoltaic inverter 6 is connected to a plurality of the stacked photovoltaic modules 1 connected in series and provides electrical energy to an external power grid.

[0149] The introduction provided in the above steps is only used to help understand the method, structure and core idea of ​​the utility model. For ordinary technicians in this technical field, the utility model can also be improved and modified without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A laminated photovoltaic module, characterized in that: include: A plurality of stacked battery assemblies (10), wherein each of the battery assemblies (10) comprises a positive electrode and a negative electrode; An insulating layer (20) disposed between each two adjacent battery assemblies (10); A plurality of optimization circuits (30), wherein each of the optimization circuits (30) is connected in series to a positive electrode and a negative electrode of a battery assembly (10), and each of the optimization circuits (30) is connected in series to a different battery assembly (10); The optimization circuit (30) is used to regulate the output voltage of the laminated photovoltaic assembly and the current of the battery assembly (10) to which it is connected.

2. The laminated photovoltaic module according to claim 1, characterized in that: The optimization circuit comprises: a sampling circuit (31) and a step-down conversion circuit (32), wherein: The sampling circuit (31) is electrically connected to one of the battery assemblies (10) and is used to collect the current and voltage of the battery assembly; The step-down conversion circuit (32) is electrically connected to the battery assembly (10) and is used to adjust the output voltage of the battery assembly (10) according to the current and voltage collected by the sampling circuit (31).

3. The laminated photovoltaic module according to claim 2, characterized in that: The step-down conversion circuit (32) comprises: a switch tube (321), a diode (322), a voltage stabilization circuit (323) and a current output terminal (324), wherein: The input end of the switch tube (321) is electrically connected to the positive electrode of the battery assembly (10); The diode (322) and the voltage stabilizing circuit (323) are connected in parallel; The output end of the switch tube (321) is respectively connected to the cathode of the diode (322) and the input end of the voltage stabilizing circuit (323); The positive electrode of the diode (322) and the output end of the voltage stabilizing circuit (323) are electrically connected to the negative electrode of the battery assembly (10); The current output terminal (324) is connected to the voltage stabilizing circuit (323) and is used to output the current stabilized by the voltage stabilizing circuit (323).

4. The laminated photovoltaic module according to claim 2, characterized in that: The optimization circuit further comprises: a logic processing module (33), wherein: The logic processing module (33) is electrically connected to the step-down conversion circuit (32), and is used to generate a pulse signal according to the reference voltage of the laminated photovoltaic module and the current and voltage collected by the sampling circuit (31), and output the pulse signal to the step-down conversion circuit (32); The step-down conversion circuit (32) is further used to regulate the output voltage of the battery assembly (10) according to the pulse signal.

5. The laminated photovoltaic module according to claim 3, characterized in that: The optimization circuit further comprises: a logic processing module (33), wherein: The logic processing module (33) is electrically connected to the step-down conversion circuit (32), and is used to generate a pulse signal according to the reference voltage of the laminated photovoltaic module and the current and voltage collected by the sampling circuit (31), and output the pulse signal to the step-down conversion circuit (32); The step-down conversion circuit (32) is further used to regulate the output voltage of the battery assembly (10) according to the pulse signal.

6. The laminated photovoltaic module according to claim 5, characterized in that: With respect to the structure in which the step-down conversion circuit (32) includes the switch tube (321), The logic processing module (33) is connected to the control end of the switch tube (321) and is used to output the pulse signal to the control end of the switch tube (321); The control end of the switch tube (321) is used to control the connection or disconnection between the input end and the output end of the switch tube (321) according to the pulse signal.

7. The laminated photovoltaic module according to claim 4 or 5, characterized in that: The logic processing module (33) is electrically connected to the sampling circuit (31) and is used to obtain the voltage and current collected by the sampling circuit (31) and track the optimal power of the battery assembly (10) in real time; The logic processing module (33) is further used to regulate the current of the battery assembly (10) according to the optimal power of the battery assembly (10) and the reference voltage of the laminated photovoltaic assembly.

8. The laminated photovoltaic module according to claim 4 or 5, characterized in that: The logic processing module (33) is further used to obtain the voltage collected by the sampling circuit (31) in each of the optimization circuits (30), and determine the reference voltage of the laminated photovoltaic module based on the collected voltage.

9. The laminated photovoltaic module according to claim 3, characterized in that: The voltage stabilizing circuit (323) comprises: an inductor (3231) and a first capacitor (3232), wherein: The input end of the inductor (3231) is electrically connected to the output end of the switch tube (321); The inductor (3231) is connected in parallel with the current output end (324), and the output end of the inductor (3231) is electrically connected to the input end of the first capacitor (3232), and the output end of the first capacitor (3232) is electrically connected to the positive electrode of the diode (322) and the negative electrode of the battery assembly (10).

10. The laminated photovoltaic module according to any one of claims 1 to 6 and 9, characterized in that: Also includes: A second capacitor (40) connected in series with a plurality of the optimization circuits (30); The second capacitor (40) is connected in parallel with the external load.

11. The laminated photovoltaic module according to any one of claims 1 to 6 and 9, characterized in that: Also includes: An optimizer (50), wherein The optimizer (50) comprises: a housing for encapsulating a plurality of the optimization circuits (30) and a connection interface, wherein: The electrode lead-out terminal of each battery assembly (10) is electrically connected to one of the optimization circuits (30) via the connection interface.

12. The laminated photovoltaic module according to any one of claims 1 to 6 and 9, characterized in that: The insulating layer (20) is a glass plate; and / or, The battery assembly (10) comprises a positive electrode and a negative electrode which are respectively arranged on the front and back sides of the battery assembly (10); and / or, The plurality of stacked battery components (10) are a perovskite battery component located at an upper layer and a crystalline silicon battery component located at a lower layer.

13. The laminated photovoltaic module according to any one of claims 1 to 6 and 9, characterized in that: Each of the optimization circuits (30) is respectively arranged in a junction box of the battery assembly (10) to which it is connected.

14. A photovoltaic power station, characterized in that: include: A laminated photovoltaic module (1) as claimed in any one of claims 1 to 13, wherein: A plurality of the stacked photovoltaic modules (1) are connected in series.

15. The photovoltaic power station according to claim 14, characterized in that: A plurality of the stacked photovoltaic modules (1) are connected in series via the optimizer (50) contained therein.

16. The photovoltaic power station according to claim 15, characterized in that: Also includes: Photovoltaic inverter (6), wherein: The photovoltaic inverter (6) is connected to a plurality of the stacked photovoltaic modules (1) connected in series, and provides electrical energy to an external power grid.

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