Perovskite crystalline silicon three-terminal laminated battery pack

Abstract

The utility model provides a perovskite crystal silicon three-terminal laminated battery pack, which comprises more than two perovskite crystal silicon three-terminal laminated batteries, and the perovskite crystal silicon three-terminal laminated batteries are all connected in parallel. The perovskite crystal silicon three-terminal laminated cell comprises front plate glass, a top cell front electrode conductive net, a cell assembly layer and a back plate which are sequentially arranged in a laminated mode in the illumination direction, the cell assembly layer comprises a top cell and a bottom cell, the top cell comprises a perovskite cell, the bottom cell comprises a crystal silicon cell, and the back plate is arranged on the front plate glass. The perovskite cell comprises a perovskite cell front electrode end, and the crystalline silicon cell comprises a crystalline silicon bottom cell positive electrode end and a crystalline silicon bottom cell negative electrode end. According to the perovskite crystal silicon three-terminal laminated battery pack, power attenuation caused by current mismatch when the perovskite crystal silicon two-terminal laminated battery pack works outdoors can be avoided, and more generating capacity can be obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar cells and relates to a perovskite crystalline silicon three-terminal stacked battery group. Background Art

[0002] In recent decades, photovoltaic technology has continued to develop, crystalline silicon cells have become extremely popular, and cell efficiency has continued to improve. It has currently reached 26.8%, getting closer and closer to the theoretical limit of 29.4%, and there is little room for further improvement.

[0003] Laminated cells have become a relatively easy-to-achieve technology for improving efficiency and have received great attention. It is reported that the laboratory efficiency of two-terminal laminated cells has exceeded 33%. However, this was obtained using a simulator in the laboratory under AM1.5G standard test conditions. The actual outdoor working climate conditions are changeable, and laminated cells are prone to current mismatch. Current mismatch leads to performance degradation, and the actual efficiency improvement is limited.

[0004] CN220528490U discloses a perovskite solar cell, which comprises a substrate, a battery component layer, a three-proof adhesive layer, a packaging adhesive film layer and a back plate stacked in sequence.

[0005] CN219352270U discloses a solar stacked cell, a cell assembly and a photovoltaic system. The solar stacked cell comprises a thin-film top cell, a crystalline silicon bottom cell, a first main grid, a second main grid, a first sub-grid, a second sub-grid and a front sub-grid; along the direction from the crystalline silicon bottom cell to the thin-film top cell, the thin-film top cell comprises a conductive layer, a first carrier transport layer, a light absorption layer and a second carrier transport layer stacked in sequence; the first main grid is connected to the first carrier transport layer, passes through the crystalline silicon bottom cell, and is connected to the first sub-grid arranged on the side of the crystalline silicon bottom cell away from the thin-film top cell; the second main grid is connected to the second carrier transport layer through the front sub-grid, passes through the thin-film top cell and the crystalline silicon bottom cell, and is connected to the second sub-grid arranged on the side of the crystalline silicon bottom cell away from the thin-film top cell.

[0006] The above scheme uses a two-terminal stacked cell device, which is prone to current mismatch under a changing spectrum. The current mismatch between the top cell and the bottom cell often leads to performance degradation, and the actual efficiency improvement is limited. In severe cases, it is even lower than that of a single crystalline silicon cell. Utility Model Content

[0007] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a perovskite crystalline silicon three-terminal stacked battery pack, which can avoid the power attenuation caused by current mismatch of the perovskite crystalline silicon two-terminal stacked battery assembly when working outdoors, and obtain more power generation.

[0008] To achieve this purpose, the utility model adopts the following technical solutions:

[0009] A perovskite crystalline silicon three-terminal stacked battery pack, the perovskite crystalline silicon three-terminal stacked battery pack includes more than two perovskite crystalline silicon three-terminal stacked batteries, the perovskite crystalline silicon three-terminal stacked batteries are fully connected in parallel, the perovskite crystalline silicon three-terminal stacked battery includes a front plate glass, a top battery front electrode conductive mesh, a battery component layer and a back plate stacked in sequence along the direction of light, the battery component layer includes a top battery and a bottom battery, the top battery includes a perovskite battery, the bottom battery includes a crystalline silicon battery, the perovskite battery includes a perovskite battery front electrode terminal, and the crystalline silicon battery includes a crystalline silicon bottom battery positive terminal and a crystalline silicon bottom battery negative terminal.

[0010] The full parallel connection between the perovskite crystalline silicon three-terminal stacked cells means that the positive terminals of the crystalline silicon bottom cells of each perovskite crystalline silicon three-terminal stacked cell are connected in parallel with each other, the negative terminals of the crystalline silicon bottom cells of each perovskite crystalline silicon three-terminal stacked cell are connected in parallel with each other, and the front electrode terminals of the perovskite cells of each perovskite crystalline silicon three-terminal stacked cell are connected in parallel with each other.

[0011] As a preferred technical solution of the present invention, the front glass plate is made of ultra-white tempered velvet glass.

[0012] As a preferred technical solution of the present invention, edge sealant is provided on the edge of the front glass.

[0013] The utility model adopts a material with low water vapor permeability as the edge sealant, preferably butyl glue, and the edge sealant forms a closed circle along the edge of the glass.

[0014] As a preferred technical solution of the present invention, the width of the edge sealant is 10 to 15 mm, for example: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm or 15 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable. The thickness of the edge sealant is 0.8 to 1.2 mm, for example: 0.8 mm, 0.9 mm, 1 mm, 1.1 mm or 1.2 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0015] As a preferred technical solution of the present invention, a front packaging film is arranged on the side of the edge sealant away from the front glass.

[0016] As a preferred technical solution of the utility model, a thermoplastic polyolefin elastomer (TOP) or elastic composite material (POE) film with a low water vapor transmission rate is used as the packaging film.

[0017] As a preferred technical solution of the present invention, the front packaging film is consistent with the area of ​​the edge sealant, and the thickness of the front packaging film is 0.4 to 0.6 mm, for example: 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm or 0.6 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0018] As a preferred technical solution of the utility model, the top battery front electrode conductive network includes a substrate film and an array of nickel-plated copper wires arranged on the surface of one side of the substrate film close to the top battery.

[0019] The nickel-plated copper wire is partially embedded in the substrate film.

[0020] As a preferred technical solution of the present invention, the substrate film includes an adhesive glue, polyethylene terephthalate (PET) and an adhesive glue which are stacked in sequence, and the thickness of the adhesive glue is independently 0.03-0.05 mm, for example: 0.03 mm, 0.035 mm, 0.04 mm, 0.045 mm or 0.05 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable. The thickness of the PET is 0.05-0.1 mm, for example: 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm or 0.1 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0021] As a preferred technical solution of the present invention, the diameter of the nickel-plated copper wire is 0.25-0.35 mm, for example: 0.25 mm, 0.28 mm, 0.3 mm, 0.32 mm or 0.35 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable. The spacing between adjacent nickel-plated copper wires is 3-5 mm, for example: 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0022] As a preferred technical solution of the utility model, the width of the top battery front electrode conductive mesh is the same as the width of the battery component layer.

[0023] As a preferred technical solution of the utility model, one end of the top battery front electrode conductive mesh in the length direction is aligned with the battery component layer, and the other end exceeds the edge of the battery component layer by 10 to 20 mm, for example: 10 mm, 12 mm, 15 mm, 18 mm or 20 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0024] As a preferred technical solution of the utility model, a top battery bus bar is arranged on the side of the top battery front electrode conductive mesh that exceeds the battery assembly layer and is close to the battery assembly layer.

[0025] As a preferred technical solution of the present invention, the width of the top battery bus bar is 4 to 6 mm, for example: 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0026] As a preferred technical solution of the present invention, the thickness of the top battery bus bar is 0.2-0.3 mm, for example: 0.2 mm, 0.22 mm, 0.25 mm, 0.28 mm or 0.3 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0027] As a preferred technical solution of the utility model, the top battery bus bar is in contact with the nickel-plated copper wire in the top battery front electrode conductive mesh.

[0028] As a preferred technical solution of the utility model, an insulating strip is arranged on one side of the top battery bus bar close to the top battery.

[0029] As a preferred technical solution of the utility model, the insulating strip covers the top battery bus bar and the nickel-plated copper wire in the top battery front electrode conductive mesh.

[0030] As a preferred technical solution of the utility model, the short side of the insulating strip covers the short side of the top battery bus bar and extends 8 to 15 mm, for example: 8 mm, 9 mm, 10 mm, 12 mm or 15 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0031] As a preferred technical solution of the utility model, the top battery is close to the side of the top battery front electrode conductive network, and the bottom battery is close to the side of the back plate.

[0032] As a preferred technical solution of the utility model, the perovskite battery includes a battery positive electrode layer, a hole transport layer, a perovskite absorption layer, a battery electron transport layer, a buffer layer and a negative electrode which are stacked in sequence along the illumination direction.

[0033] As a preferred technical solution of the utility model, the crystalline silicon cell comprises a transparent conductive oxide thin film layer (TCO layer) and a crystalline silicon cell body which are sequentially stacked along the illumination direction.

[0034] As a preferred technical solution of the utility model, the positive terminal of the crystalline silicon bottom battery and the negative terminal of the crystalline silicon bottom battery are arranged on the side of the crystalline silicon battery body away from the TCO layer.

[0035] As a preferred technical solution of the utility model, the positive terminal of the crystalline silicon bottom battery and the negative terminal of the crystalline silicon bottom battery are arranged at intervals of 2 to 10 mm near the edge of the two ends of the crystalline silicon battery body.

[0036] As a preferred technical solution of the utility model, a bottom battery collector comb is arranged on the side of the battery assembly layer close to the back plate.

[0037] As a preferred technical solution of the utility model, the bottom battery current collecting comb includes a bottom battery positive electrode current collecting comb and a bottom battery negative electrode current collecting comb.

[0038] As a preferred technical solution of the utility model, the bottom battery collecting comb is in a comb shape.

[0039] As a preferred technical solution of the utility model, the parallel sub-bus strips on the bottom cell positive bus comb are connected to the positive terminal of the crystalline silicon bottom cell.

[0040] As a preferred technical solution of the utility model, the parallel sub-bus strips on the bottom battery negative electrode bus comb are connected to the negative terminal of the crystalline silicon bottom battery.

[0041] The bottom battery bus comb described in the utility model includes a bottom battery positive bus comb and a bottom battery negative bus comb, each in a comb shape. Several parallel sub-bus strips on the bottom battery positive bus comb are respectively connected to each row of crystalline silicon bottom battery positive terminals, and are collected on the L-shaped comb trunk outside the battery; several parallel sub-bus strips on the bottom battery negative bus bar are respectively connected to each row of crystalline silicon bottom battery negative terminals, and are collected on the L-shaped comb trunk outside the battery. The bus comb lead-out part passes through the back glass lead-out hole of the packaging film to the inside of the junction box. The bus strip uses a conductive adhesive with adhesive properties, which can be directly applied to the battery and fix the battery, and the comb trunk uses a silver-plated copper strip.

[0042] As a preferred technical solution of the utility model, a back packaging film is provided on the side of the back plate close to the battery assembly layer.

[0043] As a preferred technical solution of the present utility model, the area and thickness of the back sealing film are consistent with the area and thickness of the front sealing film.

[0044] As a preferred technical solution of the utility model, a junction box is arranged on the side of the back plate away from the battery assembly layer.

[0045] As a preferred technical solution of the utility model, the junction box includes three contact points inside, which are respectively connected to the front electrode terminal of the perovskite battery, the positive terminal of the crystalline silicon bottom battery and the negative terminal of the crystalline silicon bottom battery.

[0046] As a preferred technical solution of the utility model, four cables and connectors are arranged outside the junction box, two of which are commonly connected to the positive terminal of the crystalline silicon bottom battery, and the remaining two are respectively connected to the front electrode terminal of the perovskite battery and the negative terminal of the crystalline silicon bottom battery, the front electrode terminal of the perovskite battery and the positive terminal of the bottom battery are connected to the main circuit, and the positive terminal of the bottom battery and the negative terminal of the bottom battery are connected to the auxiliary circuit.

[0047] As a preferred technical solution of the present utility model, the back plate is provided with a lead-out hole at the installation position of the corresponding junction box.

[0048] Compared with the prior art, the beneficial effects of the utility model are:

[0049] (1) The utility model adopts a perovskite crystalline silicon three-terminal stacked battery group as a power generation unit, which can avoid the power attenuation caused by current mismatch when the perovskite crystalline silicon two-terminal stacked battery assembly works outdoors, and obtain more power generation.

[0050] (2) The perovskite crystalline silicon three-terminal battery module of the utility model adopts a full parallel connection mode. Not only can the module obtain the same anti-current mismatch performance as the battery, but the heat loss of the module can be further reduced.

[0051] (3) The top battery of the utility model module is interconnected by nickel-plated copper wire, and the bottom battery is connected in parallel by two busbars. The busbar includes an L-shaped comb and a plurality of parallel busbars. The busbars are interconnected by conductive tape, which not only facilitates connection, but also fixes the battery cells, eliminating the need for tape to fix the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the structure of the perovskite crystalline silicon three-terminal stacked battery pack described in an embodiment of the utility model, wherein 1-front glass, 2-edge sealant, 3-front packaging film, 4-top battery front electrode conductive mesh, 5-top battery bus bar, 6-insulating strip, 7-battery assembly layer, 8-bottom battery bus comb, 9-back packaging film, 10-back glass, 11-junction box.

[0053] Figure 2 This is a structural diagram of the battery component layer described in an embodiment of the utility model, wherein 7-1-crystalline silicon bottom battery positive terminal, 7-2-crystalline silicon bottom battery negative terminal, 7-3-crystalline silicon battery body, 7-4-TCO layer, 7-5-perovskite battery.

[0054] Figure 3 This is a diagram of the electrode terminal structure of the battery component layer described in an embodiment of the utility model, wherein TB1-perovskite battery front electrode terminal, B1-crystalline silicon bottom battery positive terminal, B2-crystalline silicon bottom battery negative terminal. DETAILED DESCRIPTION

[0055] It should be understood that, in the description of the present utility model, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0056] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0057] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0058] Example 1

[0059] This embodiment provides a perovskite crystalline silicon three-terminal stacked battery pack, including 6 perovskite crystalline silicon three-terminal stacked batteries. The structural schematic diagram of the perovskite crystalline silicon three-terminal stacked battery pack is shown in FIG. Figure 1 As shown, the perovskite crystalline silicon three-terminal stacked battery pack includes:

[0060] Front glass 1, edge sealant 2, front packaging film 3, top battery front electrode conductive mesh 4, top battery bus bar 5, insulating strip 6, battery assembly layer 7, bottom battery bus comb 8, back packaging film 9, back glass 10 and junction box 11;

[0061] The front glass 1 is made of ultra-white tempered velvet glass; a material with low water vapor permeability (butyl rubber) is used as the edge sealant 2, and the edge sealant 2 forms a closed circle along the edge of the front glass 1, with a width of 12mm and a height of 1mm. A POE film with low water vapor permeability is used as the packaging film 3, and the packaging film 3 is located in the area surrounded by the edge sealant 2, and its length and width are consistent with the inner length and width of the edge sealant 2, and the thickness is 0.5mm;

[0062] The structure of adhesive-PET-adhesive is used as the substrate, and nickel-plated copper wire is embedded as the top battery front electrode conductive mesh 4, which is composed of nickel-plated copper wire embedded in the substrate film and a series of substrate films. Its width is the same as the width of the battery component layer 7, one end in the length direction is aligned with one end of the battery component layer 7, and the other end is 15mm longer than the edge of the battery component layer 7. The thickness of the adhesive is 0.04mm, and the thickness of PET is 0.08mm. The diameter of the nickel-plated copper wire is 0.3mm, and the spacing between adjacent nickel-plated copper wires is 4mm. The top battery front electrode conductive mesh 4 connects all the top battery front electrodes together;

[0063] A top battery bus bar 5 is arranged below the top battery front electrode conductive mesh 4 extending beyond the battery assembly layer 7, and contacts the nickel-plated copper wire of the top battery front electrode conductive mesh 4 to perform a busing and conducting function. The width is set to 5 mm, and the thickness is set to 0.25 mm. An insulating strip 6 is arranged below the top battery bus bar 5. The insulating strip 6 completely covers the bus bar and the nickel-plated copper wire of the conductive mesh in the length direction. The insulating strip 6 is 10 mm wider than the top battery bus bar 5 in the width direction. The insulating strip 6 isolates and insulates the top battery bus bar 5 from the bottom battery bus comb;

[0064] The battery component layer 7 is a stacked battery, including a top battery and a bottom battery, the top battery is a perovskite battery, and the bottom battery is a crystalline silicon IBC battery. The structure of the battery component layer 7 is shown in FIG. Figure 2 As shown, the battery component layer includes a perovskite battery 7-5, a crystalline silicon battery body 7-3, a TCO layer 7-4, and a crystalline silicon bottom battery positive terminal 7-1 and a crystalline silicon bottom battery negative terminal 7-2 arranged on the back of the crystalline silicon battery body 7-3 near the battery edge 8mm, and the perovskite battery 7-5 includes a battery positive electrode layer, a hole transport layer, a perovskite absorption layer, a battery electron transport layer, a buffer layer and a negative electrode stacked in sequence;

[0065] The electrode terminal structure diagram of the battery component layer 7 is as follows Figure 3 As shown, the front electrode terminal of the perovskite cell is TB1, the positive terminal of the crystalline silicon bottom cell is B1, and the negative terminal of the crystalline silicon bottom cell is B2. When the cell works outdoors, the spectrum is often different from the standard AM1.5G. At this time, the photocurrent of the top cell and the bottom cell is mismatched. For conventional two-terminal stacked cells, the power of the overall cell will be reduced. If the photocurrent generated by the top cell It , the photocurrent generated by the bottom cell is I b , and I t >I b , the overall power of the two-terminal stacked battery I b *V TB1 The three-terminal stacked battery pack can avoid this effect. When TB1, B1B2 are connected to the load to form a sub-circuit, the current passing through the TB1 sub-circuit is I t , split at the B1 end, I b Flows into the silicon cell to form a loop, I t -I b Part of it passes through the B1B2 sub-circuit. The power generated by the two sub-circuits is I t *V TB1 -(I t -I b )*V B1B2 Obviously, the power gain relative to the two-end stack is ΔP = I t *(V TB1 -V B1B2 )+I b *V B1B2 -I b *V TB1 =(I t -I b )(V TB1 -V B1B2 )>0, since the band gap of perovskite cells is wider and the voltage is greater than that of crystalline silicon cells, V TB1 >V B1B2 , ΔP>0, a positive gain is obtained. t b , the overall power of the neutron battery at both ends is I t *V TB1 , and the power of the three-terminal stacked battery pack is I t *V B1 +(I b -I t )*V B1B2 , the gain is ΔP=(I b -I t )*V B1B2 , and a positive gain is also obtained. Therefore, the three-terminal stacked battery pack can avoid the loss of the two-terminal stacked battery due to current mismatch, and obtain more power generation than the two-terminal stacked battery. The full parallel structure of the perovskite crystalline silicon three-terminal stacked battery pack described in the utility model connects the three ends of all batteries together respectively, and the formed assembly can obtain the same performance as the battery, so it can solve the problem that the perovskite crystalline silicon three-terminal stacked battery pack assembly can obtain more power generation than the two-terminal perovskite crystalline silicon stacked assembly.

[0066] ​The bottom battery bus comb 8 includes a bottom battery positive bus comb and a bottom battery negative bus comb, each of which is comb-shaped. Several parallel sub-bus strips on the bottom battery positive bus comb are respectively connected to each row of crystalline silicon bottom battery positive terminals 7-1, and are collected on the L-shaped comb trunk outside the battery; several parallel sub-bus strips on the bottom battery negative bus comb are respectively connected to each row of crystalline silicon bottom battery negative terminals 7-2, and are collected on the L-shaped comb trunk outside the battery, and the bus comb lead-out part passes through the lead-out hole of the back glass 10 of the packaging film to the inside of the junction box 11. The busbar uses a conductive adhesive with adhesive properties, which can be directly applied to the battery and fix the battery. The comb uses a silver-plated copper strip. The positive terminals of each crystalline silicon bottom battery are connected in parallel, and the L-shaped comb of the bottom battery positive busbar comb is connected to the positive terminal 7-1 of the crystalline silicon bottom battery. The negative terminals of each crystalline silicon bottom battery are connected in parallel, and the L-shaped comb of the bottom battery negative busbar comb is connected to the negative terminal 7-2 of the crystalline silicon bottom battery. The front electrode terminals of each perovskite battery are connected in parallel, and the top battery busbar 5 is connected to the front electrode terminals of the perovskite battery.

[0067] Flat tempered glass is used as the back panel glass 10, and a back packaging film 9 is set on the side of the back panel glass 10 close to the battery component layer, and the size and dimensions are consistent with the front packaging film. The front packaging film 3 and the back packaging film 9 wrap the battery component layer 7, the top battery bus bar 5, the insulation bar 6 and the top battery front electrode conductive mesh 4 to form a protective effect;

[0068] The junction box 11 contains three contacts inside, connecting the front electrode terminal of the perovskite cell, the positive terminal 7-1 of the crystalline silicon bottom cell, and the negative terminal 7-2 of the crystalline silicon bottom cell. There are four cables and connectors outside the junction box, two of which are connected to the positive terminal of the crystalline silicon bottom cell, and the remaining two are connected to the front electrode terminal of the perovskite cell and the negative terminal of the crystalline silicon bottom cell respectively. The front electrode terminal of the perovskite cell and the positive terminal of the bottom cell are connected to the main circuit, and the positive terminal of the bottom cell and the negative terminal of the bottom cell are connected to the auxiliary circuit.

[0069] Example 2

[0070] This embodiment provides a perovskite crystalline silicon three-terminal stacked battery pack, including 6 perovskite crystalline silicon three-terminal stacked batteries. The structural schematic diagram of the perovskite crystalline silicon three-terminal stacked battery pack is shown in FIG. Figure 1 As shown, the perovskite crystalline silicon three-terminal stacked battery pack includes:

[0071] Front glass 1, edge sealant 2, front packaging film 3, top battery front electrode conductive mesh 4, top battery bus bar 5, insulating strip 6, battery assembly layer 7, bottom battery bus comb 8, back packaging film 9, back glass 10 and junction box 11;

[0072] The front glass 1 is made of ultra-white tempered velvet glass; a material with low water vapor permeability (butyl rubber) is used as the edge sealant 2, and the edge sealant 2 forms a closed circle along the edge of the front glass 1, with a width of 10mm and a height of 0.8mm. A POE film with low water vapor permeability is used as the packaging film 3, and the packaging film 3 is located in the area surrounded by the edge sealant 2, and its length and width are consistent with the inner length and width of the edge sealant 2, and the thickness is 0.4mm;

[0073] The structure of adhesive-PET-adhesive is used as the substrate, and nickel-plated copper wire is embedded as the top battery front electrode conductive mesh 4, which is composed of nickel-plated copper wire embedded in the substrate film and a series of substrate films. Its width is the same as the width of the battery component layer 7, one end in the length direction is aligned with one end of the battery component layer 7, and the other end is 10mm longer than the edge of the battery component layer 7. The thickness of the adhesive is 0.03mm, and the thickness of PET is 0.05mm. The diameter of the nickel-plated copper wire is 0.25mm, and the spacing between adjacent nickel-plated copper wires is 3mm. The top battery front electrode conductive mesh 4 connects all the top battery front electrodes together;

[0074] A top battery bus bar 5 is arranged below the top battery front electrode conductive mesh 4 extending beyond the battery assembly layer 7, and contacts the nickel-plated copper wire of the top battery front electrode conductive mesh 4 to perform a busing and conducting function. The width is set to 4 mm, and the thickness is set to 0.2 mm. An insulating strip 6 is arranged below the top battery bus bar 5. The insulating strip 6 completely covers the bus bar and the nickel-plated copper wire of the conductive mesh in the length direction. The insulating strip 6 is 8 mm wider than the top battery bus bar 5 in the width direction. The insulating strip 6 isolates and insulates the top battery bus bar 5 from the bottom battery bus comb;

[0075] The battery component layer 7 is a stacked battery, including a top battery and a bottom battery, the top battery is a perovskite battery, and the bottom battery is a crystalline silicon IBC battery. The structure of the battery component layer 7 is shown in FIG. Figure 2 As shown, the battery component layer includes a perovskite battery 7-5, a crystalline silicon battery body 7-3, a TCO layer 7-4, and a crystalline silicon bottom battery positive terminal 7-1 and a crystalline silicon bottom battery negative terminal 7-2 arranged on the back of the crystalline silicon battery body 7-3 near the battery edge 8mm, and the perovskite battery 7-5 includes a battery positive electrode layer, a hole transport layer, a perovskite absorption layer, a battery electron transport layer, a buffer layer and a negative electrode stacked in sequence;

[0076] The bottom battery bus comb 8 includes a bottom battery positive bus comb and a bottom battery negative bus comb, each of which is comb-shaped. Several parallel sub-bus strips on the bottom battery positive bus comb are respectively connected to each row of crystalline silicon bottom battery positive terminals 7-1, and are collected on the L-shaped comb trunk outside the battery; several parallel sub-bus strips on the bottom battery negative bus comb are respectively connected to each row of crystalline silicon bottom battery negative terminals 7-2, and are collected on the L-shaped comb trunk outside the battery, and the bus comb lead-out part passes through the lead-out hole of the back glass 10 of the packaging film to the inside of the junction box 11. The busbar uses a conductive adhesive with adhesive properties, which can be directly applied to the battery and fix the battery. The comb uses a silver-plated copper strip. The positive terminals of each crystalline silicon bottom battery are connected in parallel, and the L-shaped comb of the bottom battery positive busbar comb is connected to the positive terminal 7-1 of the crystalline silicon bottom battery. The negative terminals of each crystalline silicon bottom battery are connected in parallel, and the L-shaped comb of the bottom battery negative busbar comb is connected to the negative terminal 7-2 of the crystalline silicon bottom battery. The front electrode terminals of each perovskite battery are connected in parallel, and the top battery busbar 5 is connected to the front electrode terminal of the perovskite battery (the front electrode terminal of the perovskite battery);

[0077] Flat tempered glass is used as the back panel glass 10, and a back packaging film 9 is set on the side of the back panel glass 10 close to the battery component layer, and the size and dimensions are consistent with the front packaging film. The front packaging film 3 and the back packaging film 9 wrap the battery component layer 7, the top battery bus bar 5, the insulation bar 6 and the top battery front electrode conductive mesh 4 to form a protective effect;

[0078] The junction box 11 contains three contacts inside, connecting the front electrode terminal of the perovskite cell, the positive terminal 7-1 of the crystalline silicon bottom cell, and the negative terminal 7-2 of the crystalline silicon bottom cell. There are four cables and connectors outside the junction box, two of which are connected to the positive terminal of the crystalline silicon bottom cell, and the remaining two are connected to the front electrode terminal of the perovskite cell and the negative terminal of the crystalline silicon bottom cell respectively. The front electrode terminal of the perovskite cell and the positive terminal of the bottom cell are connected to the main circuit, and the positive terminal of the bottom cell and the negative terminal of the bottom cell are connected to the auxiliary circuit.

[0079] Example 3

[0080] This embodiment provides a perovskite crystalline silicon three-terminal stacked battery pack, including 6 perovskite crystalline silicon three-terminal stacked batteries. The structural schematic diagram of the perovskite crystalline silicon three-terminal stacked battery pack is shown in FIG. Figure 1 As shown, the perovskite crystalline silicon three-terminal stacked battery pack includes:

[0081] Front glass 1, edge sealant 2, front packaging film 3, top battery front electrode conductive mesh 4, top battery bus bar 5, insulating strip 6, battery assembly layer 7, bottom battery bus comb 8, back packaging film 9, back glass 10 and junction box 11;

[0082] The front glass 1 is made of ultra-white tempered velvet glass; a material with low water vapor permeability (butyl rubber) is used as the edge sealant 2, and the edge sealant 2 forms a closed circle along the edge of the front glass 1, with a width of 15mm and a height of 1.2mm. A POE film with low water vapor permeability is used as the packaging film 3, and the packaging film 3 is located in the area surrounded by the edge sealant 2, and its length and width are consistent with the inner length and width of the edge sealant 2, and the thickness is 0.6mm;

[0083] The structure of adhesive-PET-adhesive is used as the substrate, and nickel-plated copper wire is embedded as the top battery front electrode conductive mesh 4, which is composed of nickel-plated copper wire embedded in the substrate film and a series of substrate films. Its width is the same as the width of the battery component layer 7, one end in the length direction is aligned with one end of the battery component layer 7, and the other end is 20mm longer than the edge of the battery component layer 7. The thickness of the adhesive is 0.05mm, and the thickness of PET is 0.1mm. The diameter of the nickel-plated copper wire is 0.35mm, and the spacing between adjacent nickel-plated copper wires is 5mm. The top battery front electrode conductive mesh 4 connects all the top battery front electrodes together;

[0084] A top battery bus bar 5 is arranged below the top battery front electrode conductive mesh 4 extending beyond the battery assembly layer 7, and contacts the nickel-plated copper wire of the top battery front electrode conductive mesh 4 to perform a busing and conducting function. The width is set to 6 mm, and the thickness is set to 0.3 mm. An insulating strip 6 is arranged below the top battery bus bar 5. The insulating strip 6 completely covers the bus bar and the nickel-plated copper wire of the conductive mesh in the length direction. The insulating strip 6 is 20 mm wider than the top battery bus bar 5 in the width direction. The insulating strip 6 isolates and insulates the top battery bus bar 5 from the bottom battery bus comb.

[0085] The battery component layer 7 is a stacked battery, including a top battery and a bottom battery, the top battery is a perovskite battery, and the bottom battery is a crystalline silicon IBC battery. The structure of the battery component layer 7 is shown in FIG. Figure 2 As shown, the battery component layer includes a perovskite battery 7-5, a crystalline silicon battery body 7-3, a TCO layer 7-4, and a crystalline silicon bottom battery positive terminal 7-1 and a crystalline silicon bottom battery negative terminal 7-2 arranged on the back of the crystalline silicon battery body 7-3 near the battery edge 8mm, and the perovskite battery 7-5 includes a battery positive electrode layer, a hole transport layer, a perovskite absorption layer, a battery electron transport layer, a buffer layer and a negative electrode stacked in sequence;

[0086] The bottom battery bus comb 8 includes a bottom battery positive bus comb and a bottom battery negative bus comb, each of which is comb-shaped. Several parallel sub-bus strips on the bottom battery positive bus comb are respectively connected to each row of crystalline silicon bottom battery positive terminals 7-1, and are collected on the L-shaped comb trunk outside the battery; several parallel sub-bus strips on the bottom battery negative bus comb are respectively connected to each row of crystalline silicon bottom battery negative terminals 7-2, and are collected on the L-shaped comb trunk outside the battery, and the bus comb lead-out part passes through the lead-out hole of the back glass 10 of the packaging film to the inside of the junction box 11. The busbar uses a conductive adhesive with adhesive properties, which can be directly applied to the battery and fix the battery. The comb uses a silver-plated copper strip. The positive terminals of each crystalline silicon bottom battery are connected in parallel, and the L-shaped comb of the bottom battery positive busbar comb is connected to the positive terminal 7-1 of the crystalline silicon bottom battery. The negative terminals of each crystalline silicon bottom battery are connected in parallel, and the L-shaped comb of the bottom battery negative busbar comb is connected to the negative terminal 7-2 of the crystalline silicon bottom battery. The front electrode terminals of each perovskite battery are connected in parallel, and the top battery busbar 5 is connected to the front electrode terminal of the perovskite battery (the front electrode terminal of the perovskite battery);

[0087] Flat tempered glass is used as the back panel glass 10, and a back packaging film 9 is set on the side of the back panel glass 10 close to the battery component layer, and the size and dimensions are consistent with the front packaging film. The front packaging film 3 and the back packaging film 9 wrap the battery component layer 7, the top battery bus bar 5, the insulation bar 6 and the top battery front electrode conductive mesh 4 to form a protective effect;

[0088] The junction box 11 contains three contacts inside, connecting the front electrode terminal of the perovskite cell, the positive terminal 7-1 of the crystalline silicon bottom cell, and the negative terminal 7-2 of the crystalline silicon bottom cell. There are four cables and connectors outside the junction box, two of which are connected to the positive terminal of the crystalline silicon bottom cell, and the remaining two are connected to the front electrode terminal of the perovskite cell and the negative terminal of the crystalline silicon bottom cell respectively. The front electrode terminal of the perovskite cell and the positive terminal of the bottom cell are connected to the main circuit, and the positive terminal of the bottom cell and the negative terminal of the bottom cell are connected to the auxiliary circuit.

[0089] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A perovskite crystalline silicon three-terminal stacked battery pack, characterized in that: The perovskite crystalline silicon three-terminal stacked battery group includes more than two perovskite crystalline silicon three-terminal stacked batteries, and the perovskite crystalline silicon three-terminal stacked batteries are fully connected in parallel. The perovskite crystalline silicon three-terminal stacked battery includes a front plate glass, a top battery front electrode conductive network, a battery component layer and a back plate stacked in sequence along the direction of light. The battery component layer includes a top battery and a bottom battery. The top battery includes a perovskite battery, and the bottom battery includes a crystalline silicon battery. The perovskite battery includes a perovskite battery front electrode terminal, and the crystalline silicon battery includes a crystalline silicon bottom battery positive terminal and a crystalline silicon bottom battery negative terminal.

2. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: The edge of the front glass is provided with edge sealant; The width of the edge sealant is 10 to 15 mm, and the thickness of the edge sealant is 0.8 to 1.2 mm; A front packaging film is arranged on the side of the edge sealant away from the front glass plate; The area of ​​the front packaging film is consistent with that of the edge sealant, and the thickness of the front packaging film is 0.4-0.6 mm.

3. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: The top cell front electrode conductive network includes a substrate film and nickel-plated copper wires arranged in an array on a surface of the substrate film close to the top cell; The nickel-plated copper wire is partially embedded in the substrate film; The substrate film includes adhesive glue, PET and adhesive glue which are stacked in sequence, the thickness of the adhesive glue is independently 0.03-0.05 mm, and the thickness of the PET is 0.05-0.1 mm; The diameter of the nickel-plated copper wire is 0.25-0.35 mm, and the spacing between adjacent nickel-plated copper wires is 3-5 mm; The width of the top battery front electrode conductive mesh is the same as the width of the battery component layer; One end of the top battery front electrode conductive mesh in the length direction is aligned with the battery component layer, and the other end exceeds the edge of the battery component layer by 10 to 20 mm; A top battery bus bar is arranged on the side of the top battery front electrode conductive mesh that exceeds the battery component layer and is close to the battery component layer; The width of the top battery bus bar is 4 to 6 mm; The thickness of the top battery bus bar is 0.2-0.3 mm; The top cell bus bar contacts the nickel-plated copper wire in the top cell front electrode conductive mesh; An insulating strip is arranged on one side of the top battery bus bar close to the top battery; The insulating strip covers the top cell bus bar and the nickel-plated copper wire in the top cell front electrode conductive mesh; The short side of the insulating strip covers the short side of the top cell bus bar and extends 8 to 15 mm.

4. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: The top cell is close to one side of the top cell front electrode conductive grid, and the bottom cell is close to one side of the back plate.

5. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 4, characterized in that: The perovskite battery comprises a battery positive electrode layer, a hole transport layer, a perovskite absorption layer, a battery electron transport layer, a buffer layer and a negative electrode which are sequentially stacked along the light irradiation direction.

6. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 4, characterized in that: The crystalline silicon cell also includes a TCO layer and a crystalline silicon cell body which are sequentially stacked along the light irradiation direction; The positive terminal of the crystalline silicon bottom battery and the negative terminal of the crystalline silicon bottom battery are arranged on the side of the crystalline silicon battery body away from the TCO layer; The positive terminal of the crystalline silicon bottom battery and the negative terminal of the crystalline silicon bottom battery are arranged at intervals of 2 to 10 mm near the edge of the two ends of the crystalline silicon battery body.

7. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: The battery assembly layer is provided with a bottom battery collector comb on one side close to the back plate; The bottom battery current collecting comb comprises a bottom battery positive electrode current collecting comb and a bottom battery negative electrode current collecting comb; The bottom battery busbar is in a comb shape; The parallel sub-bus strips on the bottom cell positive electrode bus comb are connected to the positive terminal of the crystalline silicon bottom cell; The parallel sub-bus strips on the bottom cell negative electrode bus comb are connected to the negative terminal of the crystalline silicon bottom cell.

8. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: A back packaging film is provided on the side of the back plate close to the battery component layer; The area and thickness of the back encapsulation film are consistent with the area and thickness of the front encapsulation film.

9. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: A junction box is arranged on the side of the back plate away from the battery assembly layer; The junction box includes three contact points inside, which are respectively connected to the front electrode terminal of the perovskite cell, the positive terminal of the crystalline silicon bottom cell and the negative terminal of the crystalline silicon bottom cell; Four cables and connectors are arranged outside the junction box, wherein two cables are commonly connected to the positive terminal of the crystalline silicon bottom battery, and the remaining two cables are respectively connected to the front electrode terminal of the perovskite battery and the negative terminal of the crystalline silicon bottom battery, the front electrode terminal of the perovskite battery and the positive terminal of the bottom battery are connected to the main circuit, and the positive terminal of the bottom battery and the negative terminal of the bottom battery are connected to the auxiliary circuit.

10. The perovskite crystalline silicon three-terminal stacked battery pack according to claim 1, characterized in that: The back plate is provided with a lead-out hole at a location corresponding to the installation of the junction box.

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