CN118432531A - Laminated photovoltaic module, preparation method thereof and photovoltaic power station - Google Patents
Laminated photovoltaic module, preparation method thereof and photovoltaic power station Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 52
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- 230000001276 controlling effect Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims description 32
- 238000005070 sampling Methods 0.000 claims description 32
- 230000000087 stabilizing effect Effects 0.000 claims description 27
- 230000000712 assembly Effects 0.000 claims description 22
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- 239000003990 capacitor Substances 0.000 claims description 19
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- 239000010410 layer Substances 0.000 description 63
- 210000004027 cell Anatomy 0.000 description 16
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- 239000011521 glass Substances 0.000 description 7
- 229910021419 crystalline silicon Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 4
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- 238000003475 lamination Methods 0.000 description 3
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- 239000000463 material Substances 0.000 description 2
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- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
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Abstract
The invention discloses a laminated photovoltaic module, a preparation method thereof and a photovoltaic power station. The laminated photovoltaic module may include: a plurality of battery modules arranged in a stacked manner, wherein each battery module comprises a positive electrode and a negative electrode; an insulating layer disposed between each adjacent two of the battery packs; a plurality of optimization circuits, wherein 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 a different battery assembly; 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 output voltage. The battery assembly of each layer in the laminated photovoltaic assembly can work under the respective optimal power, and the conversion efficiency of the laminated photovoltaic assembly can be effectively improved.
Description
Technical Field
The invention relates to a laminated photovoltaic module, a preparation method thereof and a photovoltaic power station.
Background
In order to improve the light utilization rate and the photoelectric conversion efficiency of the photovoltaic module, the photovoltaic module with the laminated structure is more and more popular in the market. However, since there is a performance difference between the upper layer assembly and the lower layer assembly in the laminated structure photovoltaic module, if the upper layer assembly and the lower layer assembly in the laminated structure photovoltaic module are directly connected to an external load, it is difficult to operate at an optimal power in order to make the upper layer assembly and the lower layer assembly supply equal voltages to the external load, which affects the efficiency of the laminated structure photovoltaic module.
In order to overcome the above-mentioned problems of the photovoltaic module of the existing laminated structure, in the prior art (CN 106298998 a), an upper layer component and a lower layer component are designed to be connected in parallel, and the parallel circuits are connected in series to the same tracking module, and a stable voltage is provided for an external load through a booster circuit in the tracking module, so that the photovoltaic module of the laminated structure can provide the stable voltage for the external load and is not affected by the change of the ground weather.
However, the optimal power of each layer of the photovoltaic module with the laminated structure is not considered in the prior art, so that each layer of the module cannot work under the optimal power, and the conversion efficiency of the photovoltaic module with the laminated structure is affected.
Disclosure of Invention
In view of the above, the present invention provides a laminated photovoltaic module, a method for manufacturing the same, and a photovoltaic power station, in which each layer of the laminated photovoltaic module can operate under respective power, and the conversion efficiency of the laminated photovoltaic module can be effectively improved.
In order to solve the technical problems, the invention provides the following technical scheme:
In a first aspect, the present invention provides a laminated photovoltaic module comprising:
A plurality of battery modules arranged in a stacked manner, wherein each of the battery modules comprises a positive electrode and a negative electrode;
an insulating layer disposed between each adjacent two of the battery modules;
A plurality of optimization circuits, wherein each of the optimization circuits is connected in series with a positive electrode and a negative electrode of one of the battery assemblies, and each of the optimization circuits is connected in series with a different one of the battery assemblies;
The optimizing 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 output voltage.
In a second aspect, an embodiment of the present invention provides a photovoltaic power station, including: a plurality of the above-described embodiments of the first aspect provide a laminated photovoltaic module, wherein,
A plurality of the laminated photovoltaic modules are connected in series.
In a third aspect, an embodiment of the present invention provides a method for preparing a laminated photovoltaic module according to the embodiment of the first aspect, including:
Step 1, preparing a battery component of a bottom layer; step 2 is carried out under the condition that the upper surface of the battery component at the bottom layer is a non-insulating layer; under the condition that the upper surface of the battery component at the bottom layer is an insulating layer, directly entering the step 3;
Step 2, paving an insulating layer on the upper surface of the battery component at the bottom layer;
Step 3, preparing an upper layer battery assembly on the insulating layer;
and 4, respectively connecting the corresponding optimizing circuits in series for each battery assembly.
The technical scheme of the first aspect of the invention has the following advantages or beneficial effects:
According to the embodiment of the invention, each battery assembly is connected in series with the independent optimizing circuit, so that the battery assemblies connected in series can be regulated and controlled through the optimizing circuit, the output voltage of each battery assembly can be regulated and controlled, each battery assembly in the laminated photovoltaic assembly can be independently controlled, mutual interference of each battery assembly is avoided, each battery assembly can work under the optimal power, and the conversion efficiency of the laminated photovoltaic assembly is effectively improved.
Drawings
Fig. 1 is a first schematic structural view of a laminated photovoltaic module according to an embodiment of the present invention;
Fig. 2 is a schematic view of a second structure of a laminated photovoltaic module according to an embodiment of the present invention;
fig. 3 is a schematic view of a third structure of a laminated photovoltaic module according to an embodiment of the present invention;
Fig. 4 is a schematic view of a fourth structure of a laminated photovoltaic module according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a buck conversion circuit according to an embodiment of the present invention;
fig. 6 is a fifth structural schematic diagram of a laminated photovoltaic module according to an embodiment of the present invention;
fig. 7 is a schematic flow diagram of a method for manufacturing a laminated photovoltaic module according to an embodiment of the present invention;
Fig. 8 is a schematic structural view of a photovoltaic power plant according to an embodiment of the present invention.
The reference numerals are as follows:
1-a laminated photovoltaic module; 10-a battery assembly; 20-an insulating layer; 30-an optimization circuit; 31-a sampling circuit; a 32-buck conversion circuit; 321-switching tube; 322-diode; 323-the voltage stabilizing circuit; 3231-inductance; 3232—a first capacitance; 324-current output; 33-a logic processing module; 40-a second capacitance; 50-an optimizer; 6-photovoltaic inverter.
Detailed Description
The laminated photovoltaic modules according to the embodiments of the present invention are typically laminated up and down with individual cell modules. Wherein each independent battery assembly has independent positive electrode, negative electrode, light absorbing layer, passivation anti-reflection layer, etc. capable of supporting each functional layer of the independent operation of the battery assembly.
The laminated photovoltaic module according to the embodiment of the present invention generally includes at least two layers of cell modules. For example, the laminated photovoltaic module may be a two-layer battery module, a three-layer battery module, a four-layer battery module, or the like. That is, the number of the cell modules included in the laminated photovoltaic module may be any number.
The lamination arrangement according to embodiments of the present invention generally refers to a structure being laminated above or below another structure, which may be in direct or indirect contact with a major surface of the other structure. Wherein direct contact generally refers to the formation or growth or deposition of one structure directly on the upper or lower surface of another structure; indirect contact generally means that other functional or nonfunctional layers are also formed between the one structure and the other structure.
The upper surface or front side of a structure according to embodiments of the present invention generally refers to a major surface of the structure that faces sunlight or upward during use of the solar cell; the lower or back surface of a structure generally refers to the one major surface of the structure that faces away from the sun or downward during use of the solar cell. Wherein the upper and lower surfaces or the front and back surfaces of a structure are opposed.
The electrical connection of one structure to another structure in accordance with embodiments of the present invention generally means that the structure is directly or indirectly connected to the other structure and that current can flow from the one structure to the other structure or from the other structure to the structure. Wherein, the direct connection of one structure and another structure means that the one structure and the other structure are directly connected through a wire. The indirect connection of one structure and another structure means that other electronic elements are arranged between the one structure and the other structure, the one structure and the other structure are both connected with the electronic elements through wires, and the one structure and the other structure are communicated through the connected electronic elements.
The "first" and "second" and the like in the embodiments of the present invention are to distinguish different structures or components or different positions of the same structure, and are not limited to the number, order, etc. of the structures or components and the like. For example, the first capacitor and the second capacitor according to the embodiments of the present invention are generally used to distinguish two capacitors that are located at different positions and have a certain difference in connection structure.
The embodiment of the invention solves the problems of different photoelectric conversion efficiency of each battery component, inconsistent attenuation speed of each battery component, mismatching current, low yield of the laminated photovoltaic component and the like of the laminated photovoltaic component by improving the design of the laminated photovoltaic component.
Fig. 1 to fig. 4 and fig. 6 are schematic views showing a part of a structure of a laminated photovoltaic module according to an embodiment of the present invention; fig. 5 is a schematic diagram of a part of a buck conversion circuit applied to a stacked photovoltaic module according to an embodiment of the present invention.
As shown in fig. 1 to 4 and fig. 6, an embodiment of the present invention provides a laminated photovoltaic module 1. The laminated photovoltaic module 1 may include:
A plurality of battery modules 10 arranged in a stacked manner, wherein each battery module 10 includes a positive electrode and a negative electrode;
An insulating layer 20 disposed between each adjacent two of the battery assemblies 10;
A plurality of optimization circuits 30, wherein each of the optimization circuits 30 is connected in series with the positive and negative poles of one battery assembly 10, and each of the optimization circuits 30 is connected in series with a different battery assembly 10;
The optimization circuit 30 is used to regulate the output voltage of the laminated photovoltaic module and the current of the battery module 10 to which it is connected.
Wherein each optimization circuit 30 independently controls the battery packs 10 to which it is connected in series. Specifically, the optimizing circuit 30 can not only operate the battery assembly 10 connected in series at the optimal power, but also control the output voltage of the battery assembly 10, and regulate the optimal operating current based on the optimal power and the actual operating voltage of the battery assembly. The respective optimization circuits 30 do not interfere with each other.
Wherein the insulating layer 20 is typically a glass plate. The glass plate can completely block the electrical contact between the adjacent cell assemblies 10, ensuring the complete electrical isolation between the adjacent cell assemblies 10. For the case that the lower battery assembly 10 is a crystalline silicon battery assembly in two adjacent battery assemblies, the glass plate is a cover plate of the crystalline silicon battery assembly, that is, the insulating layer 20 is a part of the crystalline silicon battery assembly, and no insulating layer 20 is required to be separately designed between the two adjacent battery assemblies 10. For adjacent two cell assemblies, the lower cell assembly 10 is an amorphous silicon cell assembly such as a thin film cell assembly, a perovskite cell assembly, etc., and the glass plate is an insulating layer 20 independently designed from the adjacent two cell assemblies 10.
It was found that for prior art electrical isolation of two adjacent cell components using EVA material, EVA melts and has fluidity during lamination at high temperature, so there is a risk of conduction between two adjacent cell components using EVA material as insulating layer. The glass plate provided by the embodiment of the invention is used as the structure of the insulating layer 20, is not a lamination of all layers of battery components, but is used as the upper layer of battery component after the bottom layer of battery component 10 is packaged, and the conduction risk between two adjacent battery components is avoided through the glass plate.
In general, the positive electrode and the negative electrode included in the battery assembly 10 according to the embodiment of the present invention may be located on one main surface of the battery assembly 10, such as the front surface or the back surface, or may be separately located on two main surfaces of the battery assembly 10. Preferably, the battery assembly 10 according to the embodiment of the present invention includes the positive electrode and the negative electrode provided on the front surface and the rear surface of the battery assembly 10, respectively. That is, the battery assembly 10 includes a positive electrode on the front surface of the battery assembly 10, and a negative electrode on the rear surface of the battery assembly 10; or the battery assembly 10 includes a negative electrode on the front side of the battery assembly 10 and a positive electrode on the rear side of the battery assembly 10.
The optimization circuit 30 regulates the output voltage of the laminated photovoltaic module, and the optimization circuit 30 generally reduces the voltage of the battery module 10 by ensuring that the battery module 10 connected with the optimization circuit is at the optimal power. By reducing the voltage of the battery assembly 10, the battery assembly 10 outputs higher current, and the influence of the laminated photovoltaic assembly on other laminated photovoltaic assemblies connected in series is reduced, so that problems such as shielding and the like occur in any battery assembly, and the output current and the output power of a photovoltaic power station where the laminated photovoltaic assembly is positioned can be effectively improved.
As described above, the laminated photovoltaic module provided in the embodiment of the present invention may include two or more laminated cell modules 10. The absorption spectra of the battery assemblies 10 are different, so that the light utilization rate of the overall structure of the laminated photovoltaic assembly is ensured, and the light utilization rate and the photoelectric conversion efficiency of the battery assemblies 10 can be ensured. In a preferred embodiment, the above-described laminated photovoltaic module includes two cell modules 10. In a more preferred embodiment, the plurality of battery modules 10 arranged in a stacked manner are a perovskite battery module located at an upper layer and a crystalline silicon battery module located at a lower layer. In the embodiment of the invention, the perovskite battery component is designed and regulated to mainly absorb short waves, and the crystalline silicon battery component 12 mainly absorbs long waves, so that the sunlight utilization rate and the photoelectric conversion efficiency are better improved.
In the laminated photovoltaic module provided by the embodiment of the invention, each battery module is connected in series with the independent optimizing circuit, so that the battery modules connected in series can be regulated and controlled through the optimizing circuit, the output voltage of each battery module can be regulated and controlled, each battery module in the laminated photovoltaic module can be independently controlled, the mutual interference of each battery module is avoided, each battery module can work under the optimal power, and the conversion efficiency of the laminated photovoltaic module is effectively improved.
In addition, according to the structural design of the laminated photovoltaic module provided by the embodiment of the invention, each optimization circuit can independently regulate and control the battery module connected in series to have the optimal working current under the optimal power, so that the battery module can achieve the maximum light conversion efficiency.
Further, when the decay rates of the respective battery packs are different, since the respective battery packs are operated under the control of the optimizing circuit thereof under the optimal power and the optimal operating current, the respective battery packs do not affect each other, and the conversion efficiency of the respective battery packs can be ensured to be in the optimal state as time passes.
In addition, by means of each optimizing circuit, the output voltage of the battery assembly connected in series and the current of the battery assembly 10 connected with the optimizing circuit can be independently regulated, and the output voltage of each battery assembly 10 can be matched with the output circuit.
In the embodiment of the invention, by designing the insulating layer 20 between the adjacent battery assemblies 10, the electrical communication between the adjacent battery assemblies 10 can be avoided, the yield of the laminated photovoltaic assembly is effectively improved, the waste of the battery assemblies 10 is avoided, and the production cost of the laminated photovoltaic assembly can be effectively reduced.
Specifically, as shown in fig. 2 to 4, the optimization circuit includes: a sampling circuit 31 and a buck conversion circuit 32, wherein,
The sampling circuit 31 is electrically connected with one battery assembly 10 and is used for collecting the current and the voltage of the battery assembly;
the buck conversion circuit 32 is electrically connected to the battery assembly 10, and is configured to regulate the output voltage of the battery assembly 10 according to the current and the voltage collected by the sampling circuit 31.
The sampling circuit 31 may be electrically connected to the battery assembly 10 through a signal line or a current lead. The sampling circuit 31 may include electronic components such as a voltage detection sensor and a current detection sensor, and may include other electronic components in addition to the voltage detection sensor and the current detection sensor. The specific structure of the sampling circuit 31 may be according to the existing sampling circuit design, and is not particularly limited herein. The sampling circuit 31 may be electrically connected to the battery assembly 10 by directly connecting the sampling circuit 31 to the positive electrode and the negative electrode of the battery assembly 10 through wires, or by connecting the sampling circuit 31 to a junction box to which the electrodes of the battery assembly 10 are connected through wires. In addition, other electronic components may be disposed between the battery assembly 10 and the sampling circuit 31, and the design of the other electronic components between the battery assembly 10 and the sampling circuit 31 is not limited in any way.
In the case where the sampling circuit 31 is electrically connected to the battery assembly 10 through a signal line, the buck conversion circuit 32 and the battery assembly 10 are directly electrically connected to the positive electrode and the negative electrode of the battery assembly 10 through wires.
In the case where the sampling circuit 31 is electrically connected to the battery assembly 10 through a wire, the sampling circuit 31 is provided on a circuit between the battery assembly 10 and the buck conversion circuit 32.
The buck conversion circuit 32 regulates the output voltage of the battery modules 10 to maintain the output voltage of each battery module 10 consistent, thereby ensuring that the laminated photovoltaic module outputs a stable voltage.
As shown in fig. 5, the buck conversion circuit 32 may include: a switching tube 321, a diode 322, a voltage stabilizing circuit 323, and a current output terminal 324, wherein,
The input end of the switch tube 321 is electrically connected with the positive electrode of the battery assembly 10;
The diode 322 is connected in parallel with the voltage stabilizing circuit 323;
the output end of the switch 321 is respectively connected with the cathode of the diode 322 and the input end of the voltage stabilizing circuit 323;
the anode of the diode 322 and the output terminal of the voltage stabilizing circuit 323 are electrically connected with the cathode of the battery assembly 10;
The current output terminal 324 is connected to the voltage stabilizing circuit 323, and is used for outputting the current stabilized by the voltage stabilizing circuit 323.
In the embodiment of the present invention, the above-mentioned buck conversion circuit 32 operates according to the following principle: in the on state of the input terminal and the output terminal of the switching tube 321, the diode 322 is in the off state, and the current is stored by the voltage stabilizing circuit 323 and is output to the current output terminal 324. When the input terminal and the output terminal of the switching transistor 321 are in an off state, the voltage stabilizing circuit 323 discharges, and the diode 322 is turned on and outputs to the current output terminal 324.
The buck conversion circuit 32 provided by the embodiment of the invention realizes the control of the output voltage of the current output end 324 by controlling the on-off of the switching tube 321, and ensures the stability of the output voltage through the voltage stabilizing circuit 323 and the diode 322.
The voltage stabilizing circuit 323 may include: an inductor 3231 and a first capacitor 3232, wherein an input end of the inductor 3231 is electrically connected with an output end of the switching tube 321; 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 anode of the diode 322 and the cathode of the battery assembly 10.
The operating principle of the combination of the inductor 3231 and the first capacitor 3232 in the voltage stabilizing circuit 323, the switching tube 321 and the diode 322 is as follows: when the input end and the output end of the switching tube 321 are in a conducting state, the diode 322 is in a cut-off state, the current passes through the inductor 3231, and the current is transmitted to the first capacitor 3232 to store energy, and the current is output 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 end and the output end of the switching tube 321 are in the off state, the first capacitor 3232 releases electric energy, the diode 322 is turned on, and current is sequentially output to the current output end 324 through the diode 322 and the inductor 3231, so that the stability of the output voltage is ensured.
The on or off of the switching tube 321 in the buck conversion circuit 32 may be controlled by a logic processing chip in the buck conversion circuit 32, or may be implemented by a logic processing module independent of the buck conversion circuit 32.
Whether the logic processing chip in the buck conversion circuit 32 controls the on or off of the switching tube 321 or the logic processing module independent of the buck conversion circuit 32 controls the on or off of the switching tube 321, the implementation principle is basically consistent. The specific procedure of controlling the on or off of the switching tube 321 will be described in detail below by taking a logic processing module independent of the buck conversion circuit 32 as an example.
For controlling the on or off of the switching tube 321 with a logic processing module independent of the buck converter 32, further, as shown in fig. 3 and fig. 4, the optimizing circuit 30 may further include: the logic processing module 33, wherein,
The logic processing module 33 is electrically connected with the buck conversion circuit 32, and is configured to generate a pulse signal according to a reference voltage of the laminated photovoltaic module, and output the pulse signal to the buck conversion circuit 32;
The buck conversion circuit 32 is further configured to regulate the output voltage of the battery assembly 10 according to the pulse signal. Wherein the output voltage is equal to or similar to the reference voltage.
The pulse signal is used to control the on or off of the switching tube 321.
The pulse signal is generally a pulse signal based on pulse width modulation (Pulse width modulation, PWM), and the pulse signal can affect on and off of the switching tube 321. The off time Toff and on time Ton of the switching tube 321 are one period of the pulse signal, the ratio of the on time Ton of the switching tube to the whole switching period is defined as the duty ratio D, and the output voltage U R＝D*Uin of the current output terminal 324 is obtained according to the inductance 3231 volt-second balance principle. Wherein U R represents the output voltage of the current output terminal 324; d denotes a duty cycle controlling the buck conversion circuit 32; u in denotes the input voltage of the buck converter circuit 32 (the input voltage of the buck converter circuit 32 is substantially the actual voltage of the buck converter circuit 32 input to the battery assembly 10). That is, the embodiment of the invention adjusts the switching duty ratio D through the logic processing module 33, thereby achieving the purpose of intelligently adjusting the output voltage.
Specifically, for the structure that the buck conversion circuit 32 includes a switching tube 321, the logic processing module 33 is connected to a control end of the switching tube 321, and is configured to output a pulse signal to the control end of the switching tube 321; the control end of the switching tube 321 is used for controlling the connection or disconnection between the input end and the output end of the switching tube 321 according to the pulse signal. The buck conversion circuit 32 is intelligently controlled to achieve the purpose of regulating and controlling the output voltage.
Further, in order to further ensure that the battery assembly 10 works under the optimal power, the logic processing module 33 is electrically connected with the sampling circuit 31, and is used for acquiring the voltage and the current acquired by the sampling circuit 31 and tracking 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 may be implemented using maximum power point tracking (Maximum Power Point Tracking, MPPT) techniques.
The logic processing module 33 is further configured 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 module may be preset, or may be determined based on the voltages collected in real time by the sampling circuits 31 corresponding to the respective battery modules 10 included in the laminated photovoltaic module.
In a preferred embodiment, the logic processing module 33 is further configured to obtain the voltages collected by the sampling circuits 31 in the respective optimization circuits 30, and determine the reference voltage of the laminated photovoltaic module according to the collected voltages. Wherein 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 regulated by the buck conversion circuit 32 to output according to the reference voltage, so that the output voltage is the voltage which is reduced by the buck conversion circuit 32, and the battery assembly 10 is ensured to have higher output current by reducing the voltage. That is, even if any one of the stacked photovoltaic modules 10 is problematic, such as blocked, etc., the output voltage reduction is regulated by the buck conversion circuit 32, and in the case where the battery module 10 is controlled to operate at an optimal power by the logic processing module 33, the output current increases to reduce the influence on each of the stacked photovoltaic modules connected in series in the photovoltaic power plant.
In addition, each of the battery modules 10 in the same laminated photovoltaic module may share the same logic processing module, in addition to the above-described independent provision of one logic processing module 33 per each of the battery modules 10. For the case that each battery assembly 10 shares the same logic processing module, the logic processing module still adopts independent logic control for each battery assembly 10, that is, the logic processing module can independently control the buck conversion circuits 32 of each battery assembly 10, and the regulation logic of each buck conversion circuit 32 does not affect each other.
Further, as shown in fig. 4, the laminated photovoltaic module may further include: a second capacitor 40 in series with the plurality of optimization circuits 30;
the second capacitor 40 is connected in parallel with the external load.
Wherein the external load may be a photovoltaic inverter 6 in a photovoltaic power plant.
The output voltage of the laminated photovoltaic module can be further stabilized by the second capacitor 40.
Further, as shown in fig. 5, the laminated photovoltaic module may further include: the optimizer 50 may be configured to determine, among other things,
The optimizer 50 includes: a housing for enclosing a plurality of optimization circuits 30, and a connection interface, wherein,
The electrode terminals of each cell assembly 10 are electrically connected to an optimization circuit 30 through connection interfaces.
The plurality of optimization circuits 30 are collectively managed by the optimizer 50, and the optimization circuits 30 are conveniently connected to the battery pack 10.
In addition, each optimization circuit 30 may be provided in the junction box of the battery assembly 10 to which it is connected, respectively.
Further, the embodiment of the invention also provides a preparation method of the laminated photovoltaic module provided by any embodiment. Specifically, as shown in fig. 7, the preparation method may include the steps of:
Step S701: preparing a bottom layer of the battery assembly 10; in the case where the upper surface of the battery pack 10 of the bottom layer is a non-insulating layer, the process proceeds to step S702; in the case where the upper surface of the battery pack 10 of the bottom layer is the insulating layer 20, the flow proceeds directly to step S703;
Step S702: an insulating layer 20 is laid on the upper surface of the battery assembly 10 at the bottom layer;
step S703: preparing an upper battery assembly 10 on the insulating layer 20;
step S704: a respective optimization circuit 30 is connected in series for each battery assembly 10.
By the preparation method, each battery assembly is provided with the independent optimization circuit 30, and the optimization circuit 30 independently controls the voltage of the battery assembly connected with the battery assembly, so that each battery assembly can independently work under the respective optimal power, the attenuation similarity of each battery assembly is ensured, the matching of each battery assembly is ensured, and the photoelectric conversion efficiency of the laminated photovoltaic assembly is improved.
Further, the embodiment of the invention provides a photovoltaic power station. As shown in fig. 8, the photovoltaic power plant may include: a plurality of the laminated photovoltaic modules 1 provided in any of the above embodiments, wherein,
A plurality of stacked photovoltaic modules 1 are connected in series.
Specifically, a plurality of laminated photovoltaic modules 1 are connected in series by an optimizer 50 included therein.
Further, as shown in fig. 8, the photovoltaic power station may further include: a photovoltaic inverter 6, wherein,
The photovoltaic inverter 6 is connected into a plurality of laminated photovoltaic modules 1 which are connected in series, and provides electric energy for an external power grid.
The lower voltage of the battery assembly 10 in the laminated photovoltaic assembly 1 is used as the reference voltage, the output voltage is controlled, the output current of each battery assembly 10 in the laminated photovoltaic assembly 1 is improved, the laminated photovoltaic assembly 1 and the laminated photovoltaic assembly 1 in the photovoltaic power station are connected in series, the current consistency can be ensured as much as possible through the improvement of the current, and the output current after the series flow of each laminated photovoltaic assembly 1 is the minimum current of the laminated photovoltaic assembly 1, and the voltage and the improvement of the current are reduced, so that the overall current output of the photovoltaic power station is effectively improved, and the output electric power of the photovoltaic power station is effectively improved.
In summary, the embodiments of the present invention provide the following various technical solutions:
technical solution 1, a laminated photovoltaic module, comprising:
A plurality of battery modules 10 arranged in a stacked manner, wherein each of the battery modules 10 includes a positive electrode and a negative electrode;
an insulating layer 20 disposed between each adjacent two of the battery assemblies 10;
a plurality of optimization circuits 30, wherein each of the optimization circuits 30 is connected in series with the positive electrode and the negative electrode of one of the battery assemblies 10, and each of the optimization circuits 30 is connected in series with a different one of the battery assemblies 10;
The optimization circuit 30 is used for regulating and controlling the output voltage of the laminated photovoltaic module and the current of the battery module 10 connected with the output voltage.
Technical solution 2, the laminated photovoltaic module according to the technical solution 1, the optimization circuit includes: a sampling circuit 31 and a buck conversion circuit 32, wherein,
The sampling circuit 31 is electrically connected with one battery assembly 10 and is used for collecting the current and the voltage of the battery assembly;
The buck conversion circuit 32 is electrically connected to the battery assembly 10, and is configured to regulate and control the output voltage of the battery assembly 10 according to the current and the voltage collected by the sampling circuit 31.
Technical solution the laminated photovoltaic module according to claim 2, the buck conversion circuit 32 includes: a switching tube 321, a diode 322, a voltage stabilizing circuit 323, and a current output terminal 324, wherein,
The input end of the switch tube 321 is electrically connected with the anode of the battery assembly 10;
the diode 322 is connected in parallel with the voltage stabilizing circuit 323;
The output end of the switch 321 is respectively connected with the cathode of the diode 322 and the input end of the voltage stabilizing circuit 323;
The anode of the diode 322 and the output end of the voltage stabilizing circuit 323 are electrically connected with the cathode of the battery assembly 10;
The current output terminal 324 is connected to the voltage stabilizing circuit 323, and is configured to output the current stabilized by the voltage stabilizing circuit 323.
Technical solution the laminated photovoltaic module according to the technical solution 2 or 3, the optimization circuit further includes: the logic processing module 33, wherein,
The logic processing module 33 is electrically connected to the buck conversion circuit 32, and is configured 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 buck conversion circuit 32;
The buck converter circuit 32 is further configured to regulate the output voltage of the battery assembly 10 according to the pulse signal.
Technical solution the laminated photovoltaic module according to the technical solution 4,
For a configuration in which the buck converter circuit 32 includes the switching tube 321,
The logic processing module 33 is connected to the control end of the switching tube 321, and is configured to output the pulse signal to the control end of the switching tube 321;
the control end of the switching tube 321 is configured to control the connection or disconnection between the input end and the output end of the switching tube 321 according to the pulse signal.
Technical solution 6 the laminated photovoltaic module according to the technical solution 4,
The logic processing module 33 is electrically connected with the sampling circuit 31, and is configured to acquire the voltage and the current acquired 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 configured to regulate and control 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.
Claim 7 is a laminated photovoltaic module according to claim 4,
The logic processing module 33 is further configured to obtain the voltages collected by the sampling circuits 31 in the optimization circuits 30, and determine the reference voltage of the laminated photovoltaic module according to the collected voltages.
The laminated photovoltaic module according to claim 8, the voltage stabilizing circuit 323 includes: an inductance 3231 and a first capacitance 3232, wherein,
The input end of the inductor 3231 is electrically connected with the output end of the switch tube 321;
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 anode of the diode 322 and the cathode of the battery assembly 10.
Technical solution 9, the laminated photovoltaic module according to any one of claims 1 to 3, 5 to 8, further comprising: a second capacitor 40 connected in series with a plurality of the optimization circuits 30;
The second capacitor 40 is connected in parallel with an external load.
Technical solution 10, the laminated photovoltaic module according to any one of claims 1 to 3,5 to 7, further comprising: the optimizer 50 may be configured to determine, among other things,
The optimizer 50 includes: a housing for enclosing a plurality of said optimization circuits 30, and a connection interface, wherein,
The electrode tab of each of the battery modules 10 is electrically connected to one of the optimization circuits 30 through the connection interface.
Technical solution 11 the laminated photovoltaic module according to any one of claims 1 to 3, 5 to 8,
The insulating layer 20 is a glass plate;
And/or the number of the groups of groups,
The battery assembly 10 includes a positive electrode and a negative electrode respectively provided on the front and rear surfaces of the battery assembly 10;
And/or the number of the groups of groups,
The plurality of battery modules 10 stacked are a perovskite battery module located at an upper layer and a crystalline silicon battery module located at a lower layer.
Technical solution 12 the laminated photovoltaic module according to any one of claims 1 to 3, 5 to 8,
Each of the optimization circuits 30 is provided in the junction box of the battery pack 10 to which it is connected, respectively.
Technical solution 13, a photovoltaic power plant, comprising: a plurality of laminated photovoltaic modules 1 as claimed in any of claims 1 to 12, wherein,
A plurality of the laminated photovoltaic modules 1 are connected in series.
Technical solution the photovoltaic power plant according to claim 14,
A plurality of the laminated photovoltaic modules 1 are connected in series by an optimizer 50 included therein.
Technical solution the photovoltaic power station of claim 15, according to claim 14, further comprising: a photovoltaic inverter 6, wherein,
The photovoltaic inverter 6 is connected into the plurality of laminated photovoltaic modules 1 which are connected in series, and provides electric energy for an external power grid.
The method for manufacturing a laminated photovoltaic module according to any one of claims 16, 1 to 12, comprising:
Step 1, preparing a bottom layer battery assembly 10; in the case that the upper surface of the battery assembly 10 at the bottom layer is a non-insulating layer, step 2 is entered; in the case that the upper surface of the battery assembly 10 at the bottom layer is the insulating layer 20, directly proceeding to step 3;
Step2, paving an insulating layer 20 on the upper surface of the bottom layer of the battery assembly 10;
Step 3, preparing an upper layer battery assembly 10 on the insulating layer 20;
step 4, respectively connecting the respective optimizing circuits 30 in series for each of the battery assemblies 10.
The above steps are presented merely to aid in understanding the method, structure, and core concept of the invention. It will be apparent to those skilled in the art that various changes and modifications can be made to the present invention without departing from the principles of the invention, and such changes and modifications are intended to be included within the scope of the appended claims.
Claims (10)
1. A laminated photovoltaic module, comprising:
a plurality of battery modules (10) arranged in a stacked manner, wherein each of the battery modules (10) includes a positive electrode and a negative electrode;
An insulating layer (20) provided between each adjacent two of the battery modules (10);
A plurality of optimization circuits (30), wherein each of the optimization circuits (30) is connected in series with a positive electrode and a negative electrode of one of the battery assemblies (10), and each of the optimization circuits (30) is connected in series with a different one of the battery assemblies (10);
the optimization circuit (30) is used for regulating and controlling the output voltage of the laminated photovoltaic module and the current of the battery module (10) connected with the output voltage.
2. The laminated photovoltaic module of claim 1, wherein the optimization circuit comprises: a sampling circuit (31) and a buck conversion circuit (32), wherein,
The sampling circuit (31) is electrically connected with one battery assembly (10) and is used for collecting the current and the voltage of the battery assembly;
The buck conversion circuit (32) is electrically connected with the battery assembly (10) and is used for regulating and controlling the output voltage of the battery assembly (10) according to the current and the voltage acquired by the sampling circuit (31).
3. The laminated photovoltaic module according to claim 2, wherein the buck conversion circuit (32) comprises: a switching tube (321), a diode (322), a voltage stabilizing circuit (323) and a current output terminal (324), wherein,
The input end of the switch tube (321) is electrically connected with the anode of the battery assembly (10);
The diode (322) is connected in parallel with the voltage stabilizing circuit (323);
the output end of the switching tube (321) is respectively connected with the cathode of the diode (322) and the input end of the voltage stabilizing circuit (323);
the anode of the diode (322) and the output end of the voltage stabilizing circuit (323) are electrically connected with the cathode of the battery assembly (10);
The current output end (324) is communicated with the voltage stabilizing circuit (323) and is used for outputting the current after the voltage stabilizing circuit (323) stabilizes voltage.
4. The laminated photovoltaic module according to claim 2 or 3, wherein the optimization circuit further comprises: a logic processing module (33), wherein,
The logic processing module (33) is electrically connected with the buck conversion circuit (32) and is used for generating a pulse signal according to the reference voltage of the laminated photovoltaic module and the current and the voltage acquired by the acquisition circuit (31) and outputting the pulse signal to the buck conversion circuit (32);
The buck conversion circuit (32) is further configured to regulate an output voltage of the battery assembly (10) according to the pulse signal.
5. The laminated photovoltaic module according to claim 4,
For a configuration in which the buck conversion circuit (32) includes the switching tube (321),
The logic processing module (33) is connected with the control end of the switch tube (321) and is used for outputting the pulse signal to the control end of the switch tube (321);
The control end of the switching tube (321) is used for controlling the connection or disconnection between the input end and the output end of the switching tube (321) according to the pulse signal.
6. The laminated photovoltaic module according to claim 4,
The logic processing module (33) is electrically connected with the sampling circuit (31) and is used for acquiring the voltage and the current acquired by the sampling circuit (31) and tracking the optimal power of the battery assembly (10) in real time;
The logic processing module (33) is further used for regulating and controlling 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.
7. The laminated photovoltaic module according to claim 4,
The logic processing module (33) is further configured to obtain voltages collected by the sampling circuits (31) in the optimization circuits (30), and determine a reference voltage of the laminated photovoltaic module according to the collected voltages.
8. A laminated photovoltaic module according to claim 3, characterized in that the voltage stabilizing circuit (323) comprises: an inductance (3231) and a first capacitance (3232), wherein,
The input end of the inductor (3231) is electrically connected with the output end of the switch tube (321);
The inductor (3231) is connected in parallel with the current output end (324), the output end of the inductor (3231) is electrically connected with the input end of the first capacitor (3232), and the output end of the first capacitor (3232) is electrically connected with the anode of the diode (322) and the cathode of the battery assembly (10).
9. A photovoltaic power plant, comprising: a plurality of laminated photovoltaic modules (1) according to any of claims 1 to 8, wherein,
A plurality of the laminated photovoltaic modules (1) are connected in series.
10. A method of manufacturing a laminated photovoltaic module according to any one of claims 1 to 8, comprising:
Step 1, preparing a bottom layer battery assembly (10); step 2 is entered when the upper surface of the battery pack (10) of the bottom layer is a non-insulating layer; under the condition that the upper surface of the battery component (10) at the bottom layer is an insulating layer (20), directly entering the step 3;
step 2, paving an insulating layer (20) on the upper surface of the battery assembly (10) at the bottom layer;
Step 3, preparing an upper layer battery assembly (10) on the insulating layer (20);
and 4, respectively connecting the corresponding optimizing circuits (30) in series for each battery assembly (10).
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