Cable current collector, current collection cable, and preparation method and application of current collection cable

Abstract

The invention discloses a cable current collector, a current collection cable and a preparation method and application of the current collection cable, the cable current collector comprises an inner protective shell, the inner protective shell comprises a main cable inner protective shell and at least one branch cable inner protective shell, the main cable inner protective shell and the branch cable inner protective shell are integrally formed, and the main cable inner protective shell and the branch cable inner protective shell are integrally formed. The inner protective shell at least covers the exposed wire core of the main cable and the exposed wire core of the branch cable; an outer protective shell is arranged on the outer surface of the inner protective shell, the outer protective shell at least wraps the inner protective shell, the outer protective shell comprises a main cable outer protective shell and at least one branch cable outer protective shell, and the main cable outer protective shell and the branch cable outer protective shell are integrally formed; the cable current collector further comprises a connecting piece, the connecting piece is at least used for connecting the wire core of the main cable and the wire cores of the branch cables so that the main cable can be electrically connected with at least one branch cable, the connecting piece is in a sleeve shape, the connecting piece is located inside the inner protective shell, and the inner protective shell at least wraps the connecting piece.

Description

Technical Field

[0001] The invention relates to a cable current collector, a current collecting cable, a preparation method of the current collecting cable and application thereof, and belongs to the technical field of solar photovoltaics. Background Art

[0002] Solar photovoltaic system, also known as photovoltaic, or PV for short, refers to a facility that converts solar energy into direct current electricity by using the photovoltaic effect of photovoltaic semiconductor materials.

[0003] In a solar photovoltaic power generation array, there are many branch power generation modules. The photovoltaic lines in the branches are connected in parallel and need to be converged into the main line to achieve convergence of multiple branches.

[0004] The existing solar photovoltaic module connection harness is connected to the junction box in a single channel, and the current is connected to the inverter after multiple single-channel connections to complete the current convergence. This installation process has many types and quantities of connection harnesses, complex installation, many installation parts, and high installation labor costs. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a cable collector, a collector cable, a preparation method of a collector cable and an application thereof, which can reduce the types of wiring harnesses, reduce the number of on-site junction boxes used and reduce costs.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0007] The present invention discloses a method for preparing a collector cable for connecting a solar photovoltaic module, comprising the following steps:

[0008] S10. Use a wire stripping machine to strip the ends or middle parts of the trunk cable and multiple branch cables to expose the wire cores;

[0009] S20, using a welding machine to weld the wire core of the trunk cable and the wire cores of the plurality of branch cables together; or using a connector to crimp the wire core of the trunk cable and the wire core of the branch cable together;

[0010] S30, using an injection molding machine to injection-mold an inner protective shell at the connection between the trunk cable and the branch cable;

[0011] S40, applying sealant to the connection between the inner protective shell and the trunk cable and the connection between the inner protective shell and the branch cable, so that the connection between the inner protective shell and the trunk cable and the connection between the inner protective shell and the branch cable are sealed;

[0012] S50, using an injection molding machine to injection-mold an outer protective shell on the outside of the inner protective shell.

[0013] Furthermore, the sealant is Chemlock 487A / B sealant, and the Chemlock 487A / B sealant is a mixture of Chemlock 487A sealant and Chemlock 487B sealant.

[0014] Furthermore, the Chemlok glue is mixed according to the weight ratio of Chemlok 487A glue and Chemlok 487B glue of 100:13.6.

[0015] Furthermore, the Chemlok glue is mixed with Chemlok 487A glue and Chemlok 487B glue in a volume ratio of 100:15.

[0016] Furthermore, the outer protective shell is injection-molded after the sealant is applied to the connection between the inner protective shell and the trunk cable and the connection between the inner protective shell and the branch cable and dried for more than 3 hours.

[0017] Another aspect of the present invention further discloses a cable collector, comprising an inner protective shell, the inner protective shell comprising a trunk cable inner protective shell and at least one branch cable inner protective shell, the trunk cable inner protective shell and the branch cable inner protective shell being integrally formed, the inner protective shell at least covering the exposed wire cores of the trunk cable and the exposed wire cores of the branch cable; an outer protective shell is provided on the outer surface of the inner protective shell, the outer protective shell at least covers the inner protective shell, the outer protective shell comprises a trunk cable outer protective shell and at least one branch cable outer protective shell, the trunk cable outer protective shell and the branch cable outer protective shell being integrally formed;

[0018] The cable collector also includes a connector, which is at least used to connect the core of the trunk cable and the core of the branch cable so that the trunk cable is electrically connected to at least one branch cable. The connector is sleeve-shaped and is located inside the inner protective shell. The inner protective shell at least covers the connector.

[0019] Furthermore, the inner protective shell is in a cross shape, a straight shape, a T shape, a tree shape, an X shape or a Y shape.

[0020] Furthermore, the outer protective shell is in a cross shape, a straight shape, a T shape, a tree shape, an X shape or a Y shape.

[0021] The present invention also discloses a collector cable for connecting solar photovoltaic modules, including a cable collector, the collector cable also including a trunk cable and at least one branch cable, the part of the trunk cable with exposed core and the part of the branch cable with exposed core are crimped together by a connector, the trunk cable is located inside the inner protective shell of the trunk cable, and the trunk cable is tightly connected to the inner protective shell of the trunk cable, the branch cable is located inside the inner protective shell of the branch cable, and the branch cable is tightly connected to the inner protective shell of the branch cable.

[0022] The present invention also discloses a collector cable for connecting solar photovoltaic modules, including a cable collector, the collector cable also including a trunk cable and at least one branch cable, the part of the trunk cable with exposed core and the part of the branch cable with exposed core are crimped together by a connector, the trunk cable is located inside the inner protective shell of the trunk cable, and the trunk cable is tightly connected to the inner protective shell of the trunk cable, the branch cable is located inside the inner protective shell of the branch cable, and the branch cable is tightly connected to the inner protective shell of the branch cable.

[0023] The present invention also discloses a cable current collection system, comprising a plurality of trunk cables, a plurality of branch cables and a plurality of cable collectors as described in claim 7, wherein the trunk cables and the branch cables are electrically connected via the cable collectors, and each of the trunk cables is provided with a current protector.

[0024] Compared with the prior art, the advantages of the present invention include:

[0025] 1) The cable collector provided by the present invention connects multiple branch cables with a trunk cable, connects multiple branches of solar photovoltaic modules in parallel to the trunk cable, reduces the types and number of wiring harnesses, and also reduces the number of junction boxes used, making the installation of the trunk cable and the branch cables convenient, requiring fewer installation parts, and reducing the installation labor cost;

[0026] 2) The present invention provides a cable collector, which crimps the core of a trunk cable and the core of a branch cable together through a connector, so that the trunk cable is electrically connected to at least one branch cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of a T-type cable collector provided in a typical implementation case of the present invention;

[0029] Figure 2 It is a schematic diagram of a cross-shaped cable collector provided in a typical implementation case of the present invention;

[0030] Figure 3 It is a schematic diagram of a tree-shaped cable collector provided in a typical implementation case of the present invention;

[0031] Figure 4It is a schematic diagram of a Y-type cable collector provided in a typical implementation case of the present invention;

[0032] Figure 5 It is a schematic diagram of a straight-line cable current collector provided in a typical implementation case of the present invention;

[0033] Figure 6 It is a schematic diagram of a collector cable for connecting a solar photovoltaic module connected with a T-type cable collector provided in a typical implementation case of the present invention;

[0034] Figure 7 It is a schematic diagram of a collector cable for connecting a solar photovoltaic module connected with a cross-shaped cable collector provided in a typical implementation case of the present invention;

[0035] Figure 8 It is a schematic diagram of a collector cable for connecting solar photovoltaic modules connected with a tree-shaped cable collector provided in a typical implementation case of the present invention;

[0036] Fig. 9 It is a schematic diagram of a collector cable for connecting a solar photovoltaic module connected with a Y-type cable collector provided in a typical implementation case of the present invention;

[0037] Fig.10 It is a schematic diagram of a collector cable for connecting a solar photovoltaic module connected with a straight-line cable collector provided in a typical implementation case of the present invention;

[0038] Fig.11 is a cross-sectional view of a herringbone cable collector provided in a typical implementation case of the present invention;

[0039] Fig.12 It is a cross-sectional view of a T-shaped cable collector provided in a typical implementation case of the present invention;

[0040] Fig.13 is a cross-sectional view of a cross-shaped cable collector provided in a typical implementation case of the present invention;

[0041] Fig.14 is a cross-sectional view of a tree-shaped cable collector provided in a typical implementation case of the present invention;

[0042] Fig.15 It is a structural schematic diagram of the cable collection system;

[0043] Fig.16 It is a flow chart of a method for preparing a collector cable for connecting a solar photovoltaic module;

[0044] Explanation of the accompanying drawings: 1. Inner protective shell; 2. Outer protective shell; 3. Connector; 4. Main cable; 5. Branch cable; 6. Current protector; 11. Inner protective shell of main cable; 12. Inner protective shell of branch cable; 21. Outer protective shell of main cable; 22. Outer protective shell of branch cable. DETAILED DESCRIPTION

[0045] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0046] like Fig.16 As shown, the present invention discloses, on one hand, a method for preparing a collector cable for connecting a solar photovoltaic module, comprising the following steps:

[0047] S10, using a wire stripping machine to strip the ends or middle parts of the trunk cable 4 and the plurality of branch cables 5 to expose the wire cores;

[0048] S20, using a welding machine to weld the wire core of the trunk cable 4 and the wire cores of the plurality of branch cables 5 together; or using a connector 3 to crimp the wire core of the trunk cable 4 and the wire core of the branch cable 5 together;

[0049] S30, using an injection molding machine to injection mold an inner protective shell 1 at the connection between the trunk cable 4 and the branch cable 5. When injecting the inner protective shell 1, the barrel temperatures of the injection molding machine are: the nozzle temperature is 200±10°C, the temperature of the first injection stage is 200±10°C, the temperature of the second injection stage is 200±10°C, the temperature of the third injection stage is 195±10°C, and the nozzle pressures are: the first nozzle pressure holding is 60±9 / 45±5S, the second nozzle pressure holding is 45±9, and the third nozzle pressure holding is 38±9;

[0050] S40. Apply sealant to the connection between the inner protective shell 1 and the trunk cable 4 and the connection between the inner protective shell 1 and the branch cable 5 to achieve sealing at the connection between the inner protective shell 1 and the trunk cable 4 and the connection between the inner protective shell 1 and the branch cable 5. On the one hand, it is used for waterproofing, and on the other hand, it is used to protect the connection between the trunk cable 4 and the branch cable 5. Preferably, after applying sealant at the connection between the inner protective shell 1 and the trunk cable 4 and the connection between the inner protective shell 1 and the branch cable 5, it is dried for more than 3 hours before injection molding the outer protective shell 2. Specifically, the sealant is Chemlock 487A / B sealant, and the Chemlock 487A / B sealant is a mixture of Chemlock 487A sealant and Chemlock 487B sealant; more specifically, the Chemlock sealant can be mixed according to a weight ratio of Chemlock 487A sealant to Chemlock 487B sealant of 100:13.6; the Chemlock sealant can also be mixed according to a volume ratio of Chemlock 487A sealant to Chemlock 487B sealant of 100:15;

[0051] S50 , using an injection molding machine to injection mold the outer protective shell 2 on the outside of the inner protective shell 1 .

[0052] like Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, the present invention further discloses a cable collector, including an inner protective shell 1, the material of the inner protective shell 1 is PP material or TPV material, the inner protective shell 1 includes a trunk cable inner protective shell 11 and at least one branch cable inner protective shell 12, the trunk cable inner protective shell 11 and the branch cable inner protective shell 12 are integrally injection molded, the trunk cable inner protective shell 11 is injection molded on the outer surface of the trunk cable 4 core, the branch cable inner protective shell 12 is injection molded on the outer surface of the branch cable 5 core; the inner protective shell 1 at least covers the exposed core of the trunk cable 4 and the branch cable 5 core. 5 exposed wire core; specifically, the shape of the inner protective shell 1 is cross-shaped, straight-shaped, T-shaped, tree-shaped, X-shaped or Y-shaped; the outer surface of the inner protective shell 1 is provided with an outer protective shell 2, the outer protective shell 2 at least covers the inner protective shell 1, the outer protective shell 2 includes a trunk cable outer protective shell 21 and at least one branch cable outer protective shell 22, the trunk cable outer protective shell 21 and the branch cable outer protective shell 22 are integrally injection molded; preferably, the material of the outer protective shell 2 is TPV material, and the outer protective shell 2 of TPV material has the effects of anti-ultraviolet, waterproof and flame retardant; specifically, as Figure 1-Figure 5 As shown, the shape of the outer protective shell 2 is a cross shape, a straight shape, a T shape, a tree shape, an X shape or a Y shape.

[0053] On the basis of the above, the cable collector also includes a connector 3, which is at least used to connect the core of the trunk cable 4 and the core of the branch cable 5, so that the trunk cable 4 is electrically connected to at least one branch cable 5, and the connector 3 is sleeve-shaped, and the connector 3 is located inside the inner protective shell 1, and the inner protective shell 1 at least covers the connector 3.

[0054] The present invention connects multiple branch cables 5 with the main cable 4 through a cable collector, and connects multiple branches of solar photovoltaic modules in parallel to the main cable 4, thereby reducing the types and number of wiring harnesses, and also reducing the number of junction boxes used, making the main cable 4 and the branch cables 5 easy to install, requiring fewer installation parts, and reducing the labor cost of installation.

[0055] Embodiment 1:

[0056] like Figure 2As shown, a cable collector comprises an inner protective shell 1, the inner protective shell 1 is cross-shaped, the inner protective shell 1 comprises a trunk cable inner protective shell 11 and three branch cable inner protective shells 12, the trunk cable inner protective shell 11 and the branch cable inner protective shell 12 are integrally formed, the inner protective shell 1 covers the exposed cores of the trunk cable 4 and the exposed cores of the branch cable 5; an outer protective shell 2 is provided on the outer surface of the inner protective shell 1, the outer protective shell 2 is cross-shaped, the outer protective shell 2 covers the inner protective shell 1, the outer protective shell 2 comprises a trunk cable outer protective shell 21 and three branch cable outer protective shells 22, the trunk cable outer protective shell 21 and the branch cable outer protective shell 22 are integrally formed.

[0057] Embodiment 2:

[0058] like Figure 1 As shown, a cable collector comprises an inner protective shell 1, the inner protective shell 1 is T-shaped, the inner protective shell 1 comprises a trunk cable inner protective shell 11 and two branch cable inner protective shells 12, the trunk cable inner protective shell 11 and the branch cable inner protective shell 12 are integrally formed, the inner protective shell 1 covers the exposed cores of the trunk cable 4 and the exposed cores of the branch cable 5; an outer protective shell 2 is provided on the outer surface of the inner protective shell 1, the outer protective shell 2 is T-shaped, the outer protective shell 2 covers the inner protective shell 1, the outer protective shell 2 comprises a trunk cable outer protective shell 21 and two branch cable outer protective shells 22, the trunk cable outer protective shell 21 and the branch cable outer protective shell 22 are integrally formed. The cable collector also includes a connector 3, which is used to connect the core of the trunk cable 4 and the core of the branch cable 5 so that the trunk cable 4 is electrically connected to the two branch cables 5. The connector 3 is sleeve-shaped and is located inside the inner protective shell 1. The inner protective shell 1 at least covers the connector 3.

[0059] The present invention also discloses a collector cable for connecting solar photovoltaic modules, including a cable collector 10, the collector cable also including a trunk cable 4 and at least one branch cable 5, the exposed core portion of the trunk cable 4 and the exposed core portion of the branch cable 5 are crimped together through a connector 3, the trunk cable 4 is located inside an inner protective shell 11 of the trunk cable, and the trunk cable 4 is tightly connected to the inner protective shell 11 of the trunk cable, the branch cable 5 is located inside an inner protective shell 12 of the branch cable, and the branch cable 5 is tightly connected to the inner protective shell 12 of the branch cable.

[0060] Embodiment three:

[0061] like Fig. 9As shown, a collector cable for connecting solar photovoltaic modules includes a cable collector 10, and the collector cable also includes a trunk cable 4 and two branch cables 5. The cable collector 10 includes a connector 3, and the part of the trunk cable 4 where the core is exposed and the part of the branch cable 5 where the core is exposed are crimped together by the connector 3; the outer surface of the connector 3 is injection-molded with an inner protective shell 1, and the inner protective shell 1 is Y-shaped, and the outer surface of the inner protective shell 1 is provided with an outer protective shell 2, and the outer protective shell 2 is Y-shaped; the trunk cable 4 is located inside the inner protective shell 11 of the trunk cable, and the trunk cable 4 is tightly connected to the inner protective shell 11 of the trunk cable, and the branch cable 5 is located inside the inner protective shell 12 of the branch cable, and the branch cable 5 is tightly connected to the inner protective shell 12 of the branch cable.

[0062] Embodiment 4:

[0063] The present invention also discloses a collector cable for connecting solar photovoltaic modules, including a cable collector 10, the collector cable also including a trunk cable 4 and two branch cables 5, the exposed core portion of the trunk cable 4 is welded together with the exposed core portion of the branch cable 5, the trunk cable 4 is located inside the trunk cable inner protective shell 11, and the trunk cable 4 is tightly connected to the trunk cable inner protective shell 11, the branch cable 5 is located inside the branch cable inner protective shell 12, and the branch cable 5 is tightly connected to the branch cable inner protective shell 12.

[0064] The present invention also discloses a cable current collection system, including a plurality of trunk cables 4, a plurality of branch cables 5 and a plurality of cable collectors 10, wherein the trunk cables 4 and the branch cables 5 are electrically connected via the cable collectors 10, and each of the trunk cables 4 is provided with a current protector 6.

[0065] Embodiment five:

[0066] like Fig.15 As shown, the cable power collection system includes five trunk cables 4 and five branch cables 5 . The trunk cables 4 and the branch cables 5 are electrically connected via a cable collector 10 . The trunk cables 4 are connected to a current protector 6 .

[0067] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a collector cable for connecting a solar photovoltaic module, characterized in that: The steps include: S10, using a wire stripping machine to strip the ends or middle parts of the trunk cable (4) and the plurality of branch cables (5) to expose the wire cores; S20, using a welding machine to weld the wire core of the trunk cable (4) and the wire cores of the plurality of branch cables (5) together; or using a connector (3) to crimp the wire core of the trunk cable (4) and the wire core of the branch cables (5) together; S30, using an injection molding machine to injection-mold an inner protective shell (1) at the connection portion between the trunk cable (4) and the branch cable (5); S40, applying sealant to the connection between the inner protective shell (1) and the trunk cable (4) and the connection between the inner protective shell (1) and the branch cable (5), so that the connection between the inner protective shell (1) and the trunk cable (4) and the connection between the inner protective shell (1) and the branch cable (5) are sealed; S50, using an injection molding machine to injection mold the outer protective shell (2) on the outside of the inner protective shell (1).

2. The method for preparing a collector cable for connecting a solar photovoltaic module according to claim 1, characterized in that: The sealant is Chemlock 487A / B sealant, and the Chemlock 487A / B sealant is a mixture of Chemlock 487A sealant and Chemlock 487B sealant.

3. The method for preparing a collector cable for connecting a solar photovoltaic module according to claim 2, characterized in that: The Chemlok glue is mixed according to the weight ratio of Chemlok 487A glue and Chemlok 487B glue of 100:13.

6.

4. The method for preparing a collector cable for connecting a solar photovoltaic module according to claim 2, characterized in that: The Chemlok glue is prepared by mixing Chemlok 487A glue and Chemlok 487B glue in a volume ratio of 100:

15.

5. The method for preparing a collector cable for connecting a solar photovoltaic module according to claim 1, characterized in that: The outer protective shell (2) is injection-molded after applying sealant at the connection between the inner protective shell (1) and the trunk cable (4) and at the connection between the inner protective shell (1) and the branch cable (5) and drying for more than 3 hours.

6. A cable collector, characterized in that: The invention comprises an inner protective shell (1), wherein the inner protective shell (1) comprises a trunk cable inner protective shell (11) and at least one branch cable inner protective shell (12), wherein the trunk cable inner protective shell (11) and the branch cable inner protective shell (12) are integrally formed, and the inner protective shell (1) at least covers the exposed wire cores of the trunk cable (4) and the exposed wire cores of the branch cable (5); an outer protective shell (2) is arranged on the outer surface of the inner protective shell (1), wherein the outer protective shell (2) at least covers the inner protective shell (1), and the outer protective shell (2) comprises a trunk cable outer protective shell (21) and at least one branch cable outer protective shell (22), and the trunk cable outer protective shell (21) and the branch cable outer protective shell (22) are integrally formed; And / or, the cable collector further comprises a connector (3), the connector (3) being used at least to connect the core of a trunk cable (4) and the core of a branch cable (5), so that the trunk cable (4) is electrically connected to at least one branch cable (5), the connector (3) being sleeve-shaped, the connector (3) being located inside the inner protective shell (1), and the inner protective shell (1) at least covering the connector (3).

7. A cable current collector according to claim 6, characterized in that: The shape of the inner protective shell (1) is a cross shape, a straight shape, a T shape, a tree shape, an X shape or a Y shape; And / or, the outer protective shell (2) is in a cross shape, a straight shape, a T shape, a tree shape, an X shape or a Y shape.

8. A collector cable for connecting solar photovoltaic modules, characterized in that: The cable collector comprises the cable collector as claimed in any one of claims 6 to 8, wherein the collector cable further comprises a trunk cable (4) and at least one branch cable (5), wherein the exposed core portion of the trunk cable (4) and the exposed core portion of the branch cable (5) are crimped together by a connector (3), the trunk cable (4) is located inside an inner protective shell (11) of the trunk cable, and the trunk cable (4) is tightly connected to the inner protective shell (11) of the trunk cable, and the branch cable (5) is located inside an inner protective shell (12) of the branch cable, and the branch cable (5) is tightly connected to the inner protective shell (12) of the branch cable.

9. A collector cable for connecting solar photovoltaic modules, characterized in that: The cable collector (10) comprises the cable collector as claimed in any one of claims 6 to 8, wherein the collector cable further comprises a trunk cable (4) and at least one branch cable (5), wherein the exposed core portion of the trunk cable (4) and the exposed core portion of the branch cable (5) are crimped together by a connector (3), the trunk cable (4) is located inside an inner protective shell (11) of the trunk cable, and the trunk cable (4) is tightly connected to the inner protective shell (11) of the trunk cable, and the branch cable (5) is located inside an inner protective shell (12) of the branch cable, and the branch cable (5) is tightly connected to the inner protective shell (12) of the branch cable.

10. Cable current collection system, characterized in that: The invention comprises a plurality of trunk cables (4), a plurality of branch cables (5) and a plurality of cable collectors (10) as claimed in claim 7, wherein the trunk cables (4) and the branch cables (5) are electrically connected via the cable collectors (10), and each of the trunk cables (4) is provided with a current protector (6).

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