CN219627564U - Programmable direct current power supply internal module parallel copper bar - Google Patents

Abstract

The utility model discloses a programmable direct current power supply internal module parallel copper bar, which comprises 1 module positive busbar 21, 1 module negative busbar 22, 4 connecting bars 26, 1 transfer PCB 25, 4 output copper bars 24, 1 copper bar protection sleeve II 23 and 1 copper bar protection sleeve I41; the module positive busbar 21 is connected with each module positive pole, the module negative busbar 22 is connected with each module negative pole, the connecting bar 26 is connected with each module positive pole, each module negative pole, the module positive busbar 21 and the module negative busbar 22, the switching PCB 25 is connected with the module, the module positive busbar 21, the module negative busbar 22 and the output copper bar 24, and the copper bar protection sleeve II 23, the copper bar protection sleeve I41, the output copper bar 24 and the switching PCB are assembled to form an output copper bar assembly. The copper bars are used for replacing wires, and the parallel copper bar connection scheme is adopted, so that the copper bar connection device is small in occupied space, simple in process, convenient to assemble, safe and reliable, and can effectively meet the functions.

Description

Programmable direct current power supply internal module parallel copper bar

Technical Field

The utility model relates to power supply equipment, in particular to a programmable direct current power supply internal module parallel copper bar.

Background

The high-power programmable direct current power supply is internally provided with 3 modules, and the electric performance requirement of the whole machine can be realized through the parallel connection of the 3 modules.

The parallel connection of the modules in the prior art is mainly realized by the connection of wires.

However, the available space at the rear part of the high-power programmable direct current power supply is seriously insufficient, the output current of a single module is larger, the space is difficult to meet the requirement by using wire connection, wires cannot be bound, wiring confusion is easy to cause, part of air outlets are blocked, and the process requirement is relatively high.

In view of this, the present utility model has been made.

Disclosure of Invention

The utility model aims to provide a programmable direct current power supply internal module parallel copper bar so as to solve the technical problems in the prior art.

The utility model aims at realizing the following technical scheme:

the utility model relates to a programmable direct-current power supply internal module parallel copper bar, which comprises 1 module positive busbar 21, 1 module negative busbar 22, 4 connecting bars 26, 1 transfer PCB 25, 4 output copper bars 24, 1 copper bar protection sleeve II 23 and 1 copper bar protection sleeve I41;

the positive busbar 21 of the module is connected with the positive pole of each module, the middle part is 71mm long and 10mm wide, 4 through holes 6 with the diameter phi of 4.5 are formed in the middle part, two ends of the middle part are respectively provided with a 90-degree bend, the copper bars are changed into a horizontal state from a vertical state after bending and extend to two sides, two 3.5 multiplied by 5 long round through holes 7 are respectively formed in the two ends, and a "+" pole mark 8 is carved on the copper bars;

the through hole 6 with the diameter phi of 4.5 is connected with the transfer PCB 25;

the two 3.5×5 oblong through holes 7 are connected to a connection row 26.

Compared with the prior art, the programmable direct current power supply internal module is connected with the copper bars in parallel, the copper bars are used for replacing wires, and the parallel copper bar connection scheme is adopted, so that the programmable direct current power supply internal module is small in occupied space, simple in process and convenient to assemble.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a module parallel copper bar scheme provided by an embodiment of the utility model;

fig. 2-1, 2-2 and 2-3 are respectively a connection row structure diagram and an assembly partial schematic diagram and an assembly overall schematic diagram thereof;

FIGS. 3-1 and 3-2 are block diagrams and schematic assembly views of a module negative bus, respectively;

FIGS. 4-1 and 4-2 are block diagrams of a module positive bus and assembly schematic diagrams, respectively;

FIGS. 5-1 and 5-2 are schematic views of the axial measurement and planar structure of the output copper bar, respectively;

fig. 5-3 are schematic views of two plane structures of a copper bar protection sleeve;

FIGS. 5-4 and 5-5 are schematic diagrams of an output copper bar and a copper bar protection sleeve respectively;

fig. 6-1, 6-2 and 6-3 are respectively front and back structure diagrams of the transfer PCB and an assembly schematic diagram of the transfer PCB and the output copper bar;

FIG. 7-1 is a schematic diagram of an output copper bar assembly with a module negative bus;

FIG. 7-2 is a schematic diagram of a module positive rail and module assembly;

fig. 8-1 and 8-2 are respectively a structural diagram and an assembly schematic diagram of the copper bar protection sleeve.

In the figure: 1. m3, 2, 3.5X15, 3, 4.5X15, 5, "-" pole mark, 6, 4.5, 7, 3.5X15, 8, "+" pole mark, 9, M4, 10, 3.5, 11, rectangular, 12, 2.5 diameter blind hole, 13, metal, 14, 4.5 diameter, 18, 3.5 diameter, 19, rectangular, 20, 3.5 diameter;

21. the positive busbar, 22, negative busbar, 23, copper bar protective sleeve two, 24, output copper bar, 25, transfer PCT board, 26, connection bar, 27, positive, 28, negative, 29, cross slot three combination screw m3×8, 30, cross slot three combination screw m3×12, 31, cross slot three combination screw m3×12, 32, cross slot pan head combination screw m3×10, 33, square nut M3, 34, front copper area (-), 35, front copper area (+) 36, back copper area (+) 37, back copper area (-), 38, cross slot pan head combination screw m4×10, 39, cross slot three combination screw m4×10, 40, cross slot three combination screw m3×8, 41, copper bar protective sleeve one, 42, metal panel, 43, cross pan head self tapping nail ST2.9×13.

Detailed Description

The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it will be apparent that the described embodiments are only some embodiments of the utility model, but not all embodiments, which do not constitute limitations of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

The terms that may be used herein will first be described as follows:

the term "and/or" is intended to mean that either or both may be implemented, e.g., X and/or Y are intended to include both the cases of "X" or "Y" and the cases of "X and Y".

The terms "comprises," "comprising," "includes," "including," "has," "having" or other similar referents are to be construed to cover a non-exclusive inclusion. For example: including a particular feature (e.g., a starting material, component, ingredient, carrier, formulation, material, dimension, part, means, mechanism, apparatus, step, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article of manufacture, etc.), should be construed as including not only a particular feature but also other features known in the art that are not explicitly recited.

The term "consisting of … …" is meant to exclude any technical feature element not explicitly listed. If such term is used in a claim, the term will cause the claim to be closed, such that it does not include technical features other than those specifically listed, except for conventional impurities associated therewith. If the term is intended to appear in only a clause of a claim, it is intended to limit only the elements explicitly recited in that clause, and the elements recited in other clauses are not excluded from the overall claim.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and the like should be construed broadly to include, for example: the connecting device can be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms herein above will be understood by those of ordinary skill in the art as the case may be.

The terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for ease of description and to simplify the description, and do not explicitly or implicitly indicate that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present disclosure.

What is not described in detail in the embodiments of the present utility model belongs to the prior art known to those skilled in the art. The specific conditions are not noted in the examples of the present utility model and are carried out according to the conditions conventional in the art or suggested by the manufacturer. The reagents or apparatus used in the examples of the present utility model were conventional products commercially available without the manufacturer's knowledge.

The utility model relates to a programmable direct-current power supply internal module parallel copper bar, which comprises 1 module positive busbar 21, 1 module negative busbar 22, 4 connecting bars 26, 1 transfer PCB 25, 4 output copper bars 24, 1 copper bar protection sleeve II 23 and 1 copper bar protection sleeve I41;

the positive busbar 21 of the module is connected with the positive pole of each module, the middle part is 71mm long and 10mm wide, 4 through holes 6 with the diameter phi of 4.5 are formed in the middle part, two ends of the middle part are respectively provided with a 90-degree bend, the copper bars are changed into a horizontal state from a vertical state after bending and extend to two sides, two 3.5 multiplied by 5 long round through holes 7 are respectively formed in the two ends, and a "+" pole mark 8 is carved on the copper bars;

the through hole 6 with the diameter phi of 4.5 is connected with the transfer PCB 25;

the two 3.5×5 oblong through holes 7 are connected to a connection row 26.

The negative bus bar 22 of the module is connected with the negative electrode of each module, the middle part is 71mm long and 10mm wide, 4 through holes 3 with the diameter phi of 4.5 are formed in the middle part, two ends of the middle part are respectively provided with a 90-degree bend, the copper bar is changed into a horizontal state from a vertical state after bending and extends to two sides, two 3.5 multiplied by 5 long round through holes 4 are respectively formed in the two ends, and a "-" pole mark 5 is carved on the copper bar;

the through hole 3 with the diameter phi of 4.5 is connected with the transfer PCB 25;

the 2 3.5×5 oblong through holes 7 are connected to a connection row 26.

The connecting bar 26 is connected with the positive electrode and the negative electrode of each module, the module positive bus bar 21 and the module negative bus bar 22, and 4 3.5 multiplied by 5 long round through holes 2 and 2M 3 threaded holes 1 are formed in the connecting bar 26;

the 4 3.5 multiplied by 5 long round through holes 2 are connected with the module;

the 2M 3 threaded holes 1 are connected to the module positive busbar 21 and the module negative busbar 22.

The switching PCB 25 is connected with the module, the module positive busbar 21, the module negative busbar 22 and the output copper bar 24, the switching PCB 25 is provided with 16 through holes 14 with the diameter phi 4.5, the through holes 18 with the diameter phi 3.5 are arranged in groups, and the through holes 18 with the diameter phi 3.5 are arranged in groups;

the switching PCB 25 is divided into a positive part and a negative part, the positive part and the negative part are separated from each other, copper is coated on the positive surface and the negative surface of each part, and the middle is connected through a metal via hole 13;

the front surface of the switching PCB 25 is respectively connected with the positive and negative laminating of the output copper bar 24 through 8 through holes 14 with the diameter phi of 4.5;

the reverse side of the transfer PCB 25 is connected with the module positive busbar 21 in a fitting way through the other 4 through holes 14 with the diameter phi of 4.5;

the reverse side of the transfer PCB 25 is connected with the module negative busbar 22 in a fitting way through the other 4 through holes 14 with the diameter phi of 4.5;

the lower part of the transfer PCB 25 is connected with the positive electrode and the negative electrode of the module through 8 through holes 18 with the diameter phi of 3.5.

The output copper bar 24 is connected with the output of the power supply equipment, and is provided with 8M 4 threaded holes 9 which are arranged in groups;

the output copper bar 24 has a general structure of positive and negative electrodes, wherein 2 groups of the output copper bar are positive, and 2 groups of the output copper bar are negative;

the threaded holes 9 of the M4 are connected with the module positive bus bar 21, the module negative bus bar 22 and the transfer PCB 25.

The second copper bar protection sleeve 23 and the first copper bar protection sleeve 41 are assembled together with the output copper bar 24 and the transfer PCB to form an output copper bar assembly, the second copper bar protection sleeve 23 is used for fixing the output copper bar 24, and the first copper bar protection sleeve 41 is used for fixing the second copper bar protection sleeve 23 and the output copper bar 24 on the metal panel 42.

In summary, the programmable direct current power supply internal module of the embodiment of the utility model is connected with the copper bars in parallel, the copper bars are used for replacing wires, and the parallel copper bar connection scheme is adopted, so that the occupied space is small, the process is simple, and the assembly is convenient;

the copper bar is reasonable in design, convenient to install, safe and reliable, small in occupied space and simple in structure on the basis of effectively meeting functions.

In order to more clearly demonstrate the technical scheme and the technical effects provided by the utility model, the following detailed description of the embodiments of the utility model is given by way of specific examples.

The copper bar connection scheme is divided into six parts: the module positive bus bar (1), the module negative bus bar (1), the connecting bar (4), the switching PCB board (1), the output copper bar (4), copper bar protective sleeve two (1), copper bar protective sleeve one (1), the complete set is used.

1. Module positive bus bar:

the connection is used for the positive electrode of each module; the middle part of the module positive busbar is 71mm long and 10mm wide, and 4 through holes with diameter phi of 4.5 are formed in the middle part; two ends of the middle part are respectively provided with a 90-degree bend, and the copper bars are changed into a horizontal state from a vertical state after bending and extend to two sides; two 3.5 multiplied by 5 long round through holes are respectively arranged at two ends of the module front row; for convenient identification, the copper bar is carved with a "+" pole mark.

The through hole with the diameter phi of 4.5 is used for being connected with the transfer PCB;

the two 3.5×5 oblong through holes are used for connecting with the connecting rows.

2. Module negative bus bar:

the connection is used for the negative electrode of each module; the length of the middle part of the module negative busbar is 71mm, the width is 10mm, and 4 through holes with the diameter phi of 4.5 are formed in the middle part; two ends of the middle part are respectively provided with a 90-degree bend, and the copper bars are changed into a horizontal state from a vertical state after bending and extend to two sides; two 3.5 multiplied by 5 long round through holes are respectively arranged at two ends of the module front row; for convenient identification, the copper bar is carved with a 'polar mark'.

The through hole with the diameter phi of 4.5 is used for being connected with the transfer PCB;

the 2 long round through holes with the length of 3.5 multiplied by 5 are used for being connected with the connecting rows.

3. Connection row

The connecting device is used for connecting the positive electrode and the negative electrode of each module with the module positive busbar and the module negative busbar; the connecting row is provided with 4 oblong through holes of 3.5 multiplied by 5 and 2M 3 threaded holes.

The 4 3.5 multiplied by 5 long round through holes are used for connecting with the module;

the threaded holes of the 2M 3 are used for being connected with the module positive bus bar and the module negative bus bar respectively.

4. Switching PCB board

The device is used for connecting the module, the module positive busbar, the module negative busbar and the output copper bar; the transfer PCB is provided with 16 through holes with diameter phi of 4.5, and the through holes are arranged in groups; the transfer PCB has 8 through holes with diameter phi of 3.5, and the through holes are arranged in groups

The switching PCB comprises a positive part and a negative part which are separated from each other; copper is coated on the front and back sides of each part, and the middle is connected through a metal via hole;

the front surface of the transfer PCB is respectively connected with the positive and negative laminating of the output copper bar through 8 through holes with the diameter phi of 4.5;

the back surface of the transfer PCB is in fit connection with the module positive busbar through 4 through holes with the diameter phi of 4.5;

the back surface of the transfer PCB is in fit connection with the module negative busbar through 4 through holes with the diameter phi of 4.5;

the lower part of the transfer PCB is connected with the positive electrode and the negative electrode of the module through 8 through holes with the diameter phi of 3.5; .

5. Output copper bar

An output for a power supply device; the copper bar is provided with 8M 4 threaded holes which are arranged in groups.

The output copper bars are universal in positive and negative, 2 groups are positive, and 2 groups are negative;

and the threaded hole of the M4 is used for connecting the module positive busbar, the module negative busbar and the transfer PCB.

6. Copper bar protective sleeve II

The device is used for fixing and insulating the output copper bars; and the copper bar assembly is assembled with the output copper bar and the transfer PCB to form an output copper bar assembly, and the copper bar assembly is used in a complete set.

The copper bar protection sleeve II consists of a copper bar protection sleeve II and a copper bar protection sleeve I, the copper bar protection sleeve II is used for fixing output copper bars, and the copper bar protection sleeve I is used for fixing the output copper bars on the metal panel.

Example 1

As shown in fig. 1 to 8-2:

the scheme of the module parallel copper bar is divided into six parts: the module positive busbar (1), the module negative busbar (1), the connecting bar (4), switching PCB board (1), output copper bar (4), copper bar protective sheath two (1), copper bar protective sheath one (1), the complete set uses, as shown in figure 1.

The connecting row is provided with 2M 3 threaded through holes 1 which can be connected with the module positive bus bar and the module negative bus bar; 4 3.5×5 oblong through holes 2 on the connecting row can be connected positively and negatively by 4M 3×8 cross pan head combination nails and modules, as shown in fig. 2-2.

The module negative busbar is provided with 4 through holes 3 with the diameter phi of 4.5 and used for being connected with the output copper bar assembly; 4 3.5X 5 oblong through holes 4 on the module negative busbar can be connected by 4M 3X12 cross pan head combination nails and connecting bars, as shown in fig. 3-2; for easy identification, the copper bar is engraved with a "-" pole identification 5.

The module positive busbar is provided with 4 through holes 6 with the diameter phi of 4.5 and used for being connected with the output copper bar assembly; 4 3.5X 5 oblong through holes 7 on the module negative busbar can be connected by 4M 3X12 cross pan head combination nails and connecting bars, as shown in fig. 4-2; for easy identification, the copper bar is carved with a "+" pole mark 8.

The output copper bar is provided with 8M 4 threaded holes 9 which are arranged in groups and used for connecting the module positive busbar, the module negative busbar and the transfer PCB; the output copper bar is provided with 2 through holes 10 with the diameter phi of 3.5, and the through holes are used for fixing the output copper bar and a copper bar protection sleeve II.

The second output copper bar protective sleeve is provided with 2 rectangular through holes 11 for the output copper bars to pass through; the second output copper bar protection sleeve is provided with 8 blind holes 12 with diameter phi of 2.5, and the blind holes are used for connecting the first output copper bar protection sleeve.

After two groups of output copper bars pass through the holes 11, 2 cross groove pan head combination nails pass through the through holes 10 on the output copper bars, and then the square nuts of M3 are clamped with the second output copper bar protection sleeve, so that the fixation of the output copper bars and the second output copper bar protection sleeve is realized, as shown in fig. 5-5.

The transfer PCB comprises a positive part and a negative part which are separated from each other; copper is coated on the front and back sides of each part, and the middle is connected through a metal via hole 13; the front surface of the transfer PCB is connected with the output copper bar in a bonding way; the transfer PCB is provided with 16 through holes with diameter phi of 4.5, and the through holes are arranged in groups; wherein, 4 through holes 14 with the diameter phi of 4.5 can be positively connected with the output copper bar by using 4 cross slot pan head combination nails of M4X 10; 4 through holes 15 with the diameter phi of 4.5 can be negatively connected with 4 cross groove pan head combination nails of M4X10 and output copper bars, as shown in figures 6-3.

The reverse side of the transfer PCB is connected with the module negative busbar and the module positive busbar in a bonding way; 4 through holes 16 with diameter phi of 4.5 on the transfer PCB board can be connected with the module positive busbar by using 4 cross groove pan head combination nails of M4X 10; 4 through holes 17 with the diameter phi of 4.5 on the transfer PCB board can be connected with the module negative busbar by using 4 cross slot pan head combination nails of M4X10, as shown in figure 7-1.

The reverse side of the transfer PCB is connected with the module in a fitting way; the through holes 18 with the diameter phi of 3.5 on the transfer PCB can be respectively connected with the positive and negative of the module by 8M 3X8 cross groove pan head combination nails, as shown in fig. 7-2.

The first output copper bar protection sleeve is provided with 2 rectangular through holes 19 for the output copper bars to pass through; the first output copper bar protection sleeve is provided with 8 through holes 20 with the diameter phi of 3.5, and the through holes are used for fixing the first output copper bar protection sleeve.

The metal panel was installed and the first and second copper bar protectors were connected with 8 cross slot pan head self-tapping screws ST2.9-13 as shown in fig. 8-2.

The parallel copper bar scheme of the module has the advantages of simple structure, convenient disassembly and assembly, good manufacturability, and neatness and attractiveness. The power supply module has the advantages that the electric parallel function of the power supply module is met, space is saved, devices are placed in the power supply at high density, the whole size of the equipment is reduced, and the space utilization rate of a standard plug box is improved. Meanwhile, good manufacturability also improves the assembly efficiency of the whole machine, saves working hours, and further reduces the production and manufacturing cost of products.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims. The information disclosed in the background section herein is only for enhancement of understanding of the general background of the utility model and is not to be taken as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.

Claims (6)

1. The programmable direct current power supply internal module parallel copper bar is characterized by comprising 1 module positive busbar (21), 1 module negative busbar (22), 4 connecting bars (26), 1 switching PCB (25), 4 output copper bars (24), 1 copper bar protection sleeve II (23) and 1 copper bar protection sleeve I (41);

the positive busbar (21) of the module is connected with the positive poles of the modules, the middle part is 71mm long and 10mm wide, 4 through holes I (6) with the diameter phi of 4.5 are formed in the middle part, two ends of the middle part are respectively provided with a 90-degree bend, the copper bar is changed into a horizontal state from a vertical state after bending, and extends to two sides, two 3.5 multiplied by 5 long round through holes I (7) are respectively formed at the two ends, and a "+" pole mark (8) is carved on the copper bar;

the first through hole (6) with the diameter phi of 4.5 is connected with the switching PCB (25);

the two 3.5×5 oblong through holes I (7) are connected to a connection row (26).

2. The programmable direct current power supply internal module parallel copper bar according to claim 1, wherein the module negative bus bar (22) is connected with each module negative electrode, the middle part is 71mm long and 10mm wide, 4 through holes II (3) with the diameter phi of 4.5 are formed in the middle part, two ends of the middle part are respectively provided with a 90-degree bend, the copper bar is changed into a horizontal state from a vertical state and extends to two sides after bending, two long round through holes II (4) with the diameter phi of 3.5 multiplied by 5 are respectively formed at two ends, and a "-" pole mark (5) is carved on the copper bar;

the second through hole (3) with the diameter phi of 4.5 is connected with the switching PCB (25);

the 2 3.5×5 oblong through holes I (7) are connected with a connection row (26).

3. The programmable direct current power supply internal module parallel copper bar according to claim 2, wherein the connecting bar (26) is connected with each module positive and negative electrode and module positive bus bar (21) and module negative bus bar (22), and 4 3.5×5 oblong through holes three (2) and 2M 3 threaded holes (1) are formed in the connecting bar (26);

the 4 3.5 multiplied by 5 oblong through holes III (2) are connected with the module;

the threaded holes (1) of the 2M 3 are connected with a module positive busbar (21) and a module negative busbar (22).

4. A programmable direct current power supply internal module parallel copper bar according to claim 3, characterized in that the connection between the transfer PCB (25) and the module, the module positive busbar (21), the module negative busbar (22) and the output copper bar (24) is made by arranging in groups 16 through holes three (14) with diameter phi 4.5 and 8 through holes four (18) with diameter phi 3.5;

the switching PCB (25) is divided into a positive part and a negative part, the positive part and the negative part are separated from each other, copper is coated on the positive side and the negative side of each part, and the middle is connected through a metal via hole (13);

the front surface of the switching PCB (25) is respectively connected with the positive and negative laminating of the output copper bar (24) through 8 through holes (14) with the diameter phi of 4.5;

the back surface of the transfer PCB (25) is connected with the module positive busbar (21) in a fitting way through the other 4 through holes (14) with the diameter phi of 4.5;

the back surface of the transfer PCB (25) is connected with the module negative busbar (22) in a bonding way through the other 4 through holes (14) with the diameter phi of 4.5;

the lower part of the switching PCB (25) is connected with the positive electrode and the negative electrode of the module through 8 through holes (18) with the diameter phi of 3.5.

5. The programmable direct current power supply internal module parallel copper bar according to claim 4, wherein the output copper bar (24) is connected with the output of the power supply equipment, and is provided with 8M 4 threaded holes (9) which are arranged in groups;

the output copper bar (24) has a general structure of positive and negative electrodes, wherein 2 groups of the output copper bar are positive, and 2 groups of the output copper bar are negative;

the threaded holes (9) of the M4 are connected with the module positive bus bar (21), the module negative bus bar (22) and the switching PCB (25).

6. The programmable dc power supply internal module parallel copper bar of claim 5, wherein the second copper bar protection sleeve (23) and the first copper bar protection sleeve (41) are assembled together with the output copper bar (24) and the transfer PCB to form an output copper bar assembly, the second copper bar protection sleeve (23) fixes the output copper bar (24), and the first copper bar protection sleeve (41) fixes the second copper bar protection sleeve (23) and the output copper bar (24) on the metal surface (42).