Parallel copper bars inside a programmable DC power supply internal module

Abstract

The application discloses a kind of programmable DC power supply internal module parallel copper bar, including 1 module positive busbar 21, 1 module negative busbar 22, 4 connection rows 26, 1 adapter PCB 25, 4 output copper bars 24, 1 copper bar protection sleeve two 23, 1 copper bar protection sleeve one 41;Module positive busbar 21 is connected with each module positive, module negative busbar 22 is connected with each module negative, connection row 26 is connected with each module positive, negative and module positive busbar 21, module negative busbar 22, the connection between adapter PCB 25 and module, module positive busbar 21, module negative busbar 22 and output copper bar 24, copper bar protection sleeve two 23 and copper bar protection sleeve one 41 are assembled together with output copper bar 24, adapter PCB and form output copper bar assembly.Copper bar is replaced by wire, and parallel copper bar connection scheme is adopted, with small occupied space, simple process, easy to assemble, safe and reliable, and can effectively meet the function.

Description

Technical Field

[0001] This invention relates to a power supply device, and more particularly to a parallel copper busbar for an internal module of a programmable DC power supply. Background Technology

[0002] The high-power programmable DC power supply consists of three modules. By connecting the three modules in parallel, the electrical performance requirements of the entire machine can be met.

[0003] In existing technologies, parallel connection of modules is mainly achieved through the connection of wires.

[0004] However, the usable space at the rear of the high-power programmable DC power supply is severely insufficient, and the output current of a single module is relatively large. Using wires for connection makes it difficult to meet the space requirements, and the wires cannot be tied, which can easily cause messy wiring and block some air outlets. The process requirements are relatively high.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a parallel copper busbar for the internal module of a programmable DC power supply to solve the above-mentioned technical problems existing in the prior art.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] The programmable DC power supply of the present invention includes a parallel copper busbar for the internal module, comprising a positive busbar 21, a negative busbar 22, four connection busbars 26, a converter PCB board 25, four output copper busbars 24, a second copper busbar protective sleeve 23, and a first copper busbar protective sleeve 41.

[0009] The module positive busbar 21 is connected to the positive pole of each module. The middle part is 71mm long and 10mm wide, with 4 through holes 6 with a diameter of φ4.5. There is a 90° bend at each end of the middle part. After the bend, the copper busbar changes from a vertical state to a horizontal state and extends to both sides. There are two 3.5×5 elongated through holes 7 at each end. The copper busbar is engraved with a "+" pole mark 8.

[0010] The through hole 6 with a diameter of φ4.5 is connected to the adapter PCB board 25;

[0011] The two 3.5×5 elongated through holes 7 are connected to the connecting row 26.

[0012] Compared with the prior art, the programmable DC power supply provided by the present invention uses copper busbars instead of wires in its internal module parallel copper busbar connection scheme, which occupies less space, has a simpler process, and is easier to assemble. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the module parallel copper busbar scheme provided in an embodiment of the present invention;

[0014] Figure 2-1 , Figure 2-2 , Figure 2-3 These are, respectively, a structural diagram of the connecting strip and a partial assembly schematic diagram and an overall assembly schematic diagram;

[0015] Figure 3-1 , Figure 3-2 These are the structural diagram and assembly schematic of the module negative bus;

[0016] Figure 4-1 , Figure 4-2 These are the structural diagram and assembly schematic of the module's positive bus;

[0017] Figure 5-1 , Figure 5-2 These are, respectively, isometric and planar structural schematics of the output copper busbar;

[0018] Figure 5-3 This is a schematic diagram of the two-plane structure of the copper busbar protective sleeve;

[0019] Figure 5-4 , Figure 5-5 These are isometric and planar schematic diagrams of the two-part assembly of the output copper busbar and the copper busbar protective sleeve, respectively.

[0020] Figure 6-1 , Figure 6-2 , Figure 6-3 The diagrams show the front and back structures of the adapter PCB and its assembly with the output copper busbars.

[0021] Figure 7-1 This is a schematic diagram of the assembly of the output copper busbar assembly and the module negative busbar;

[0022] Figure 7-2 This is a schematic diagram of the module's positive bus and module assembly;

[0023] Figure 8-1 , Figure 8-2 These are structural diagrams and assembly schematics of the copper busbar protective sleeve.

[0024] In the picture:

[0025] 1. M3 threaded through hole; 2. 3.5×5 oblong through hole; 3. Through hole with diameter φ4.5; 4. 3.5×5 oblong through hole; 5. "-" polarity marking; 6. Through hole with diameter φ4.5; 7. 3.5×5 oblong through hole; 8. "+" polarity marking; 9. M4 threaded hole; 10. Through hole with diameter φ3.5; 11. Rectangular through hole; 12. Blind hole with diameter φ2.5; 13. Metal via; 14. Through hole with diameter φ4.5; 14. Through hole with diameter φ4.5; 14. Through hole with diameter φ4.5; 14. Through hole with diameter φ4.5; 18. Through hole with diameter φ3.5; 19. Rectangular through hole; 20. Through hole with diameter φ3.5.

[0026] 21. Module positive busbar, 22. Module negative busbar, 23. Copper busbar protective sleeve II, 24. Output copper busbar, 25. Adapter PCT board, 26. Connector busbar, 27. Module positive, 28. Module negative, 29. Phillips head three-way combination screw M3×8, 30. Phillips head three-way combination screw M3×12, 31. Phillips head three-way combination screw M3×12, 32. Phillips head pan head combination screw M3×10, 33. Square nut M3, 34. Front copper plating area (-), 35. Front copper plating area (+), 36. Back copper plating area (+), 37. Back copper plating area (-), 38. Phillips head pan head combination screw M4×10, 39. Phillips head three-way combination screw M4×10, 40. Phillips head three-way combination screw M3×8, 41. Copper busbar protective sleeve I, 42. Metal panel, 43. Phillips head pan head self-tapping screw ST2.9×13. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them, and do not constitute a limitation on the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0028] First, the following explanations are provided for the terms that may be used in this article:

[0029] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0030] The terms “including,” “comprising,” “containing,” “having,” or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, “including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.)” should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0031] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0032] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0033] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0034] The contents not described in detail in the embodiments of this invention are prior art known to those skilled in the art. Where specific conditions are not specified in the embodiments of this invention, they shall be performed according to conventional conditions in the art or conditions recommended by the manufacturer. Where the manufacturers of the reagents or instruments used in the embodiments of this invention are not specified, they are all conventional products that can be purchased commercially.

[0035] The programmable DC power supply of the present invention includes a parallel copper busbar for the internal module, comprising a positive busbar 21, a negative busbar 22, four connection busbars 26, a converter PCB board 25, four output copper busbars 24, a second copper busbar protective sleeve 23, and a first copper busbar protective sleeve 41.

[0036] The module positive busbar 21 is connected to the positive pole of each module. The middle part is 71mm long and 10mm wide, with 4 through holes 6 with a diameter of φ4.5. There is a 90° bend at each end of the middle part. After the bend, the copper busbar changes from a vertical state to a horizontal state and extends to both sides. There are two 3.5×5 elongated through holes 7 at each end. The copper busbar is engraved with a "+" pole mark 8.

[0037] The through hole 6 with a diameter of φ4.5 is connected to the adapter PCB board 25;

[0038] The two 3.5×5 elongated through holes 7 are connected to the connecting row 26.

[0039] The module negative busbar 22 is connected to the negative pole of each module. The middle part is 71mm long and 10mm wide, with 4 through holes 3 with a diameter of φ4.5. There is a 90° bend at each end of the middle part. After the bend, the copper busbar changes from a vertical state to a horizontal state and extends to both sides. There are two 3.5×5 elongated through holes 4 at each end. The copper busbar is engraved with a "-" pole mark 5.

[0040] The through hole 3 with a diameter of φ4.5 is connected to the adapter PCB board 25;

[0041] The two 3.5×5 elongated through holes 7 are connected to the connecting row 26.

[0042] The connecting bus 26 is connected to the positive and negative terminals of each module and the positive bus 21 and negative bus 22 of the module. The connecting bus 26 has four 3.5×5 elongated through holes 2 and two M3 threaded holes 1.

[0043] The four 3.5×5 elongated through holes 2 are connected to the module;

[0044] The two M3 threaded holes 1 are connected to the module positive busbar 21 and the module negative busbar 22.

[0045] The adapter PCB board 25 is connected to the module, the module positive bus 21, the module negative bus 22 and the output copper bus 24. The adapter PCB board 25 has 16 through holes 14 with a diameter of φ4.5 arranged in groups and 8 through holes 18 with a diameter of φ3.5 arranged in groups.

[0046] The adapter PCB board is divided into two parts, positive and negative, separated in the middle. Each part has copper plating on both sides and is connected in the middle by a metal via 13.

[0047] The front side of the adapter PCB board 25 is connected to the positive and negative output copper busbar 24 through eight through holes 14 with a diameter of φ4.5 respectively.

[0048] The reverse side of the adapter PCB board 25 is connected to the module's front busbar 21 via four additional through holes 14 with a diameter of φ4.5.

[0049] The reverse side of the adapter PCB board 25 is connected to the module negative busbar 22 through four additional through holes 14 with a diameter of φ4.5.

[0050] The lower part of the adapter PCB board 25 is connected to the positive and negative terminals of the module through eight through holes 18 with a diameter of φ3.5.

[0051] The output copper busbar 24 is connected to the output of the power supply equipment. The copper busbar has 8 M4 threaded holes 9 arranged in groups.

[0052] The output copper busbar has a universal structure for both positive and negative terminals, with two buses forming a positive group and two buses forming a negative group.

[0053] The threaded hole 9 of the M4 is connected to the module positive bus 21, the module negative bus 22 and the adapter PCB board 25.

[0054] The copper busbar protective sleeve 23 and copper busbar protective sleeve 41 are assembled together with the output copper busbar 24 and the adapter PCB to form an output copper busbar assembly. The copper busbar protective sleeve 23 fixes the output copper busbar 24, and the copper busbar protective sleeve 41 fixes the copper busbar protective sleeve 23 and the output copper busbar 24 to the metal panel 42.

[0055] In summary, the parallel copper busbars in the internal module of the programmable DC power supply of this embodiment of the invention replace wires with copper busbars, and the parallel copper busbar connection scheme occupies little space, has a simple process, and is easy to assemble.

[0056] The copper busbar is reasonably designed, easy to install, safe and reliable, occupies little space, and has a simple structure while effectively meeting its functions.

[0057] To more clearly demonstrate the technical solution and its effects provided by the present invention, the embodiments of the present invention will be described in detail below with reference to specific examples.

[0058] The copper busbar connection scheme consists of six parts: module positive busbar (1), module negative busbar (1), connection busbar (4), adapter PCB board (1), output copper busbar (4), copper busbar protective sleeve two (1), and copper busbar protective sleeve one (1), which are used as a set.

[0059] 1. Module positive bus:

[0060] Used for connecting the positive terminals of each module; the middle part of the module positive busbar is 71mm long and 10mm wide, with 4 through holes of φ4.5 on it; there is a 90° bend at each end of the middle part, after which the copper busbar changes from a vertical state to a horizontal state and extends to both sides; there are two 3.5×5 elongated through holes at each end of the module positive busbar; for easy identification, the copper busbar is engraved with a "+" terminal mark.

[0061] The through hole with a diameter of φ4.5 is used for connection with the adapter PCB board;

[0062] The two 3.5×5 elongated through holes are used for connection with the connecting strip.

[0063] 2. Module negative bus:

[0064] Used for connecting the negative terminals of each module; the middle part of the module negative busbar is 71mm long and 10mm wide, with 4 through holes of diameter φ4.5; there is a 90° bend at each end of the middle part, after which the copper busbar changes from a vertical state to a horizontal state and extends to both sides; there are two 3.5×5 elongated through holes at each end of the module positive busbar; for easy identification, the copper busbar is engraved with a "-" terminal mark.

[0065] The through hole with a diameter of φ4.5 is used for connection with the adapter PCB board;

[0066] The two 3.5×5 elongated through holes are used to connect with the connecting strip.

[0067] 3. Connecting strip

[0068] Used for connecting the positive and negative terminals of each module and the positive and negative busbars of the module; the connector has 4 elongated through holes of 3.5×5 mm and 2 M3 threaded holes.

[0069] The four 3.5×5 elongated through holes are used for connection with the module;

[0070] The two M3 threaded holes are used to connect to the module's positive busbar and negative busbar, respectively.

[0071] 4. Adapter PCB board

[0072] Used for connections between modules, module positive bus, module negative bus, and output copper bus; the adapter PCB has 16 through holes with a diameter of φ4.5, arranged in groups; the adapter PCB has 8 through holes with a diameter of φ3.5, arranged in groups.

[0073] The adapter PCB is divided into two parts, positive and negative, separated in the middle; each part has copper plating on both sides and is connected in the middle by a metal via.

[0074] The front side of the adapter PCB board is connected to the positive and negative output copper busbars through eight through holes with a diameter of φ4.5, respectively.

[0075] The reverse side of the adapter PCB board is connected to the module's front busbar via four through holes with a diameter of φ4.5.

[0076] The reverse side of the adapter PCB board is connected to the module's negative busbar via four through holes with a diameter of φ4.5.

[0077] The lower part of the adapter PCB board is connected to the positive and negative terminals of the module through eight through holes with a diameter of φ3.5.

[0078] 5. Output copper busbar

[0079] Used for the output of power supply equipment; the copper busbar has 8 M4 threaded holes arranged in a group.

[0080] The output copper busbars can be used for both positive and negative signals, with two buses forming a positive group and two buses forming a negative group.

[0081] The threaded hole of the M4 is used for connecting the module positive bus, the module negative bus, and the adapter PCB.

[0082] 6. Copper busbar protective sleeve II

[0083] Used for fixing and insulating the output copper busbar; it is assembled with the output copper busbar and adapter PCB to form an output copper busbar assembly for use as a complete set.

[0084] The copper busbar protective sleeve 2 consists of copper busbar protective sleeve 2 and copper busbar protective sleeve 1. Copper busbar protective sleeve 2 is used to fix the output copper busbar, and copper busbar protective sleeve 1 is used to fix the output of the above two to the metal panel.

[0085] Example 1

[0086] like Figures 1 to 8-2 As shown:

[0087] The module parallel copper bus solution consists of six parts: module positive bus (1 unit), module negative bus (1 unit), connector bus (4 units), adapter PCB board (1 unit), output copper bus (4 units), copper bus protection sleeve two (1 unit), and copper bus protection sleeve one (1 unit). These are used as a complete set, such as... Figure 1 As shown.

[0088] The connector has two M3 threaded through holes 1, which can be connected to the module's positive and negative busbars; the connector also has four 3.5×5 oblong through holes 2, which can be used with four M3×8 Phillips head combination screws to connect to the module's positive and negative connections, such as... Figure 2-2 .

[0089] The module negative bus has four through holes 3 with a diameter of φ4.5 for connecting to the output copper bus assembly; the module negative bus also has four oblong through holes 4 with a diameter of 3.5×5, which can be connected to the connector using four M3X12 Phillips head pins, such as... Figure 3-2 For easy identification, the copper busbar is engraved with the "-" pole mark 5.

[0090] The module's positive busbar has four through holes 6 with a diameter of φ4.5 for connecting to the output copper busbar assembly; the module's negative busbar has four oblong through holes 7 with a diameter of 3.5×5, which can be connected to the connector using four M3X12 Phillips head pins. Figure 4-2 For easy identification, the copper busbar is engraved with a "+" polarity symbol 8.

[0091] The output copper busbar has eight M4 threaded holes 9 arranged in groups for connecting the module positive busbar, the module negative busbar and the adapter PCB board; the output copper busbar has two through holes 10 with a diameter of φ3.5 for fixing the output copper busbar and the copper busbar protective sleeve II.

[0092] The output copper busbar protective sleeve 2 has two rectangular through holes 11 for the output copper busbar to pass through; the output copper busbar protective sleeve 2 has eight blind holes 12 with a diameter of φ2.5 for connecting to the output copper busbar protective sleeve 1.

[0093] Two output copper busbars are connected in a group. After passing through hole 11, two cross-groove pan head combination screws are used to pass through the through hole 10 on the output copper busbar. Then, an M3 square nut is used to lock the output copper busbar to the output copper busbar protective sleeve two, thus fixing the output copper busbar to the output copper busbar protective sleeve two. Figure 5-5 As shown.

[0094] The adapter PCB is divided into positive and negative parts, separated in the middle; each part has copper plating on both sides, connected by a metal via 13; the front of the adapter PCB is attached to the output copper busbar; the adapter PCB has 16 through holes with a diameter of φ4.5, arranged in groups; four through holes with a diameter of φ4.5 14 can be connected to the positive output copper busbar using four M4X10 cross-slot pan head combination screws; four through holes with a diameter of φ4.5 15 can be connected to the negative output copper busbar using four M4X10 cross-slot pan head combination screws, such as... Figure 6-3 .

[0095] The adapter PCB board's reverse side is bonded to the module's negative bus and positive bus; the adapter PCB board has four φ4.5 diameter through holes 16, which can be connected to the module's positive bus using four M4X10 Phillips head pins; the adapter PCB board also has four φ4.5 diameter through holes 17, which can be connected to the module's negative bus using four M4X10 Phillips head pins. Figure 7-1 .

[0096] The adapter PCB board is mounted and connected to the module on the reverse side; the adapter PCB board has 8 through holes with a diameter of φ3.5, which can be connected to the module's positive and negative sides respectively using 8 M3X8 Phillips head pins. Figure 7-2 .

[0097] The output copper busbar protective sleeve has two rectangular through holes 19 for the output copper busbar to pass through; the output copper busbar protective sleeve has eight through holes 20 with a diameter of φ3.5 for fixing the output copper busbar protective sleeve.

[0098] Install the metal panel and connect copper busbar protective sleeve one and copper busbar protective sleeve two using eight ST2.9-13 Phillips head pan head self-tapping screws, as follows: Figure 8-2 .

[0099] This modular parallel copper busbar design features a simple structure, easy assembly and disassembly, excellent manufacturability, and a neat and aesthetically pleasing appearance. It satisfies the electrical parallel connection function of the power supply module while saving space, enabling high-density placement of components inside the power supply, reducing the overall size of the equipment, and thus improving the space utilization of the standard socket. Simultaneously, the excellent manufacturability also improves the overall assembly efficiency, saves labor time, and consequently reduces the product's manufacturing costs.

[0100] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of the present invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. A parallel copper bus for internal modules of a programmable direct current power supply, characterized in that, Includes 1 module positive bus (21), 1 module negative bus (22), 4 connection bus (26), 1 adapter PCB board (25), 4 output copper bus (24), 1 copper bus protection sleeve II (23), and 1 copper bus protection sleeve I (41). The module positive busbar (21) is connected to the positive pole of each module. The middle part is 71mm long and 10mm wide. There are 4 through holes (6) with a diameter of φ4.5 on it. There is a 90° bend at each end of the middle part. After the bend, the copper busbar changes from a vertical state to a horizontal state and extends to both sides. There are two 3.5×5 elongated through holes (7) at each end. The copper busbar is engraved with "+" pole markings (8). The through hole (6) with a diameter of φ4.5 on the positive busbar (21) of the module is connected to the adapter PCB board (25); The two 3.5×5 elongated through holes (7) on the module's positive busbar (21) are connected to the connecting busbar (26); The module negative busbar (22) is connected to the negative pole of each module. The middle part is 71mm long and 10mm wide. There are 4 through holes with a diameter of φ4.5 (3) on it. There is a 90° bend at each end of the middle part. After the bend, the copper busbar changes from a vertical state to a horizontal state and extends to both sides. There are two 3.5×5 elongated through holes at each end (4). The copper busbar is engraved with a "-" pole mark (5). The through hole (3) with a diameter of φ4.5 on the negative busbar (22) of the module is connected to the adapter PCB board (25); The two 3.5×5 elongated through holes (7) on the module negative busbar (22) are connected to the connecting busbar (26); The connecting bus (26) is connected to the positive and negative terminals of each module and the positive bus (21) and negative bus (22) of the module. The connecting bus (26) has four 3.5×5 elongated through holes (2) and two M3 threaded holes (1). The four 3.5×5 elongated through holes (2) on the connecting bar (26) are connected to the module; The two M3 threaded holes (1) on the connecting bus (26) are connected to the module positive bus (21) and the module negative bus (22).

2. The parallel copper busbar of the internal module of the programmable DC power supply according to claim 1, characterized in that, The connection between the adapter PCB (25) and the module, the module positive bus (21), the module negative bus (22) and the output copper bus (24) is such that the adapter PCB (25) has 16 through holes (14) with a diameter of φ4.5 arranged in groups, and 8 through holes (18) with a diameter of φ3.5 arranged in groups; The adapter PCB (25) is divided into positive and negative parts, separated in the middle. Each part is copper-plated on both the positive and negative sides and connected in the middle by a metal via 13. The front side of the adapter PCB (25) is connected to the positive and negative output copper busbar (24) through eight through holes (14) with a diameter of φ4.5 respectively; The reverse side of the adapter PCB (25) is connected to the module busbar (21) through four additional through holes (14) with a diameter of φ4.

5. The reverse side of the adapter PCB (25) is connected to the module negative busbar (22) through four additional through holes (14) with a diameter of φ4.

5. The lower part of the adapter PCB (25) is connected to the positive and negative terminals of the module through eight through holes (18) with a diameter of φ3.

5.

3. The programmable DC power supply internal module parallel copper bus of claim 2, wherein, The output copper busbar (24) is connected to the output of the power supply equipment. The copper busbar has 8 M4 threaded holes (9) arranged in groups. The output copper busbar (24) has a universal structure for both positive and negative terminals, with two buses forming a positive group and two buses forming a negative group. The threaded hole (9) of the M4 is connected to the module positive bus (21), the module negative bus (22) and the adapter PCB (25).

4. The programmable DC power supply internal module parallel copper bus of claim 3, wherein, The copper busbar protective sleeve two (23) and copper busbar protective sleeve one (41) are assembled together with the output copper busbar (24) and the adapter PCB to form an output copper busbar assembly. The copper busbar protective sleeve two (23) fixes the output copper busbar (24), and the copper busbar protective sleeve one (41) fixes the copper busbar protective sleeve two (23) and the output copper busbar (24) on the metal surface (42).

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