Copper busbar protective cover and copper busbar components

Abstract

The present invention provides a copper busbar protective cover (1) and a copper busbar assembly, comprising: a fixing member (2), the fixing member being in the shape of a tube with two ends open and fixed to the copper busbar (4); and a protective cover (3), the protective cover (3) comprising a main board (31) and a side board (32), the side board (32) being erected from the edge of the main board (31) to form a storage space, the protective cover (3) being able to accommodate the electrical connection end of the copper busbar (4) in the storage space, the protective cover (3) being connected to the fixing member (2) and being able to flip relative to the fixing member (2). Thus, the fixing member (2) and the protective cover (3) of the copper busbar protective cover (1) can be manufactured separately and assembled to form the copper busbar protective cover (1), which can reduce the difficulty of the injection molding process.

Description

Technical Field

[0001] The invention relates to the field of battery connection, and in particular to a copper busbar protective cover and a copper busbar assembly. Background Art

[0002] Copper busbars are used in vehicle battery packs to electrically connect battery cells and battery modules. For insulation protection purposes, the copper busbars need to be provided with a protective layer and the electrical connection portions at the ends need to be provided with protective covers.

[0003] Traditional copper bars, for example, use extrusion, sleeve and hot pressing to form an insulating protective layer on the surface of the copper bar. However, for this type of copper bar, a rubber sleeve is currently commonly used as a protective sleeve and the rubber sleeve is fixed to the electrical connection part of the end of the copper bar. The rubber sleeve is formed as a tube as a whole, with an opening for the copper bar to enter and an opening for exposing the electrical connection part of the copper bar. However, for this type of copper bar, when workers install the copper bar, they need to lift the rubber sleeve to expose the electrical connection part of the copper bar and perform a connection operation on the electrical connection part. At this time, since a large force will be applied to the rubber sleeve, the fixed part of the rubber sleeve and the copper bar is easily displaced, which affects the assembly efficiency and increases the risk of electric shock.

[0004] There is also an injection-molded copper busbar, which forms a protective layer and a protective sleeve by injection molding. However, when the protective layer and the protective sleeve are formed by injection molding, the mold design is difficult and the cost is high. Summary of the invention

[0005] In view of the above problems, the present invention provides a copper busbar protective cover and a copper busbar assembly, which can be formed at a relatively low cost to protect the electrical connection portion of the copper busbar.

[0006] One scheme of the present invention provides a copper busbar protective cover, comprising: a fixing piece, which is in the shape of a tube with openings at both ends and is fixed to the copper busbar; and a protective cover, which comprises a main board and a side plate, wherein the side plate is erected from the edge of the main board to form a storage space, wherein the protective cover can accommodate the electrical connection end of the copper busbar in the storage space, and the protective cover is connected to the fixing piece and can be flipped relative to the fixing piece.

[0007] Thus, the protective cover and the fixing member of the copper bar protective cover can be manufactured separately (for example, by injection molding) and the copper bar protective cover can be formed by assembling the protective cover and the fixing member. Compared with the case where the protective cover is formed by one-time injection molding, the difficulty of the injection molding process can be reduced, and it will not hinder the winding of mica tape on the copper bar to improve the anti-thermal runaway capability of the copper bar.

[0008] Preferably, in the above copper busbar protective cover, the fixing piece comprises a first fixing portion and a second fixing portion, the first fixing portion and the second fixing portion are respectively groove-shaped, and the cylindrical fixing piece is formed by assembling the first fixing portion and the second fixing portion.

[0009] Thus, the separately manufactured fixing piece can be conveniently fixed to the copper busbar, so that the manufacturing process of the fixing piece becomes simpler and the cost is reduced.

[0010] Preferably, in the above-mentioned copper busbar protective cover, a first clamping portion is provided on one of the first fixing portion and the second fixing portion, and a first clamped portion is provided on the other of the first fixing portion and the second fixing portion, and the first clamped portion is clamped with the first clamped portion, so that the first fixing portion and the second fixing portion are assembled into the fixing part and fixed to the copper busbar.

[0011] Thus, a split structure of a fixing piece is provided, the fixing piece can be conveniently fixed to the copper busbar, and the manufacturing process of the fixing piece becomes simpler and the cost is reduced.

[0012] Preferably, in the above-mentioned copper busbar protective cover, a second engaging portion is provided on one of the fixing piece and the protective cover, and a second engaged portion is provided on the other of the fixing piece and the protective cover, and the protective cover is connected to the fixing piece by engaging the second engaging portion with the second engaged portion.

[0013] In this way, the separately formed fixing piece and the protective cover can be connected, thereby realizing the function of protecting the electrical connection end of the copper busbar.

[0014] Preferably, in the above-mentioned copper busbar protective cover, the second engaging portion is annular with a notch, and the second engaged portion includes two first rods erected from the other of the fixing member and the protective cover and a second rod connecting the ends of the two first rods, and the diameter of the second rod is greater than the width of the notch.

[0015] Thus, the protective cover can be easily rotated relative to the fixing part, and during the rotation, the force applied to the protective cover by the operator will not be transmitted to the fixing part, so that even when the operator operates the protective cover, the fixing part will not move relative to the copper bar, and the anti-electric shock function can be ensured. In addition, since the fixing part and the protective cover are formed separately, the shapes of the second engaging part and the second engaged part can be easily realized for assembly and disassembly, and the cost is low.

[0016] Preferably, in the above copper busbar protective cover, the second engaging portion is arranged on the mainboard side of the protective cover.

[0017] As a result, when the protective cover is turned over relative to the fixing member, it can be rotated smoothly.

[0018] Preferably, in the above copper busbar protective cover, the fixing piece is in the shape of a curved cylinder, and the openings at both ends thereof are oriented in directions intersecting each other.

[0019] Therefore, it is possible to adapt to various shapes of the copper busbar, and the bent shape of the copper busbar can be used to fix the fixing piece relative to the copper busbar.

[0020] Another embodiment of the present invention provides a copper busbar assembly, comprising: a copper busbar; a protective layer, the protective layer covering the portion of the copper busbar other than the electrical connection end; and a copper busbar protective cover as described in any one of claims 1 to 7, the fixing of the copper busbar protective cover covering the protective layer, and the protective cover covering the electrical connection end of the copper busbar exposed from the protective layer.

[0021] Thus, the protective cover and the fixing member of the copper busbar protection sleeve can be manufactured separately (for example, by injection molding), which can reduce the difficulty of the injection molding process.

[0022] Preferably, in the above copper busbar assembly, the fixing piece and the portion of the copper busbar covered by the protective layer are interference fit to achieve fixation of the fixing piece and the copper busbar.

[0023] Therefore, even if the fixing member and the protective cover are formed separately by the injection molding process, the copper busbar and the fixing member can be conveniently fixed.

[0024] Preferably, in the above copper busbar assembly, an anti-slip protrusion is provided inside the fixing member, and the anti-slip protrusion abuts against the protective layer to fix the copper busbar.

[0025] In this way, the fixing piece can be more firmly fixed to the copper busbar, and it can be more reliably ensured that the fixing piece will not move relative to the copper busbar when the operator flips over the protective cover, thereby ensuring the anti-electric shock function. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of the copper busbar assembly of the present invention;

[0027] Figure 2 is a cross-sectional view of a copper busbar assembly of the present invention;

[0028] Figure 3 It is a three-dimensional diagram of the copper bar protection cover without the copper bar of the present invention;

[0029] Figure 4 is a schematic diagram of an existing protective cover;

[0030] Figure 5 It is a partially enlarged schematic diagram of the copper busbar protective cover of the present invention. DETAILED DESCRIPTION

[0031] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0032] It should be pointed out that the embodiments of the present invention and the technical features therein may be combined with each other without conflict.

[0033] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the copper busbar protection cover 1 of this embodiment includes a fixing member 2 and a protective cover 3. The fixing member 2 is used to fix the copper busbar protection cover 1 to the copper busbar 4. The protective cover 3 is connected to the fixing member 2 and can be flipped relative to the fixing member 2 to protect the electrical connection end 41 of the copper busbar 4 from electric shock.

[0035] When the copper busbar 4 is electrically connected to a connection object, such as a battery terminal, the electrical connection end 41 is brought close to the connection object with the surface 41a facing the connection object, and the external threaded component (such as a bolt) of the connection object is inserted into the through hole 41b of the electrical connection end 41.

[0036] At this time, in order to screw the internal thread member (such as a nut) on the back surface 41c side of the electrical connection end portion 41, it is necessary to Figure 1 and Figure 2 From the state shown, the protective cover 3 is flipped in the direction away from the electrical connection end 41 of the copper busbar 4, thereby exposing the back side 41c of the electrical connection end 41. In the state where the protective cover 3 is flipped in the direction away from the electrical connection end 41 of the copper busbar 4, thereby exposing the back side 41c of the electrical connection end 41, the operator inserts the bolt of the electrical connection object into the through hole 41b and exposes the head of the bolt from the back side 41c, and then the operator screws the nut inserted into the through hole 41b of the connection object on the back side 41c, thereby fixing the electrical connection end 41 of the copper busbar 4 to the connection object.

[0037] The copper busbar 4 is provided with a protective layer 5 on the surface of the portion other than the electrical connection end 41. The protective layer 5 covers all surfaces of the copper busbar 4 other than the surfaces covered by the fixing member 2 and the protective cover 2 and at least a portion of the surface covered by the fixing member 2. The protective layer 5 can be provided by extrusion processing, sleeve processing and hot pressing processing.

[0038] In the extrusion process, the plastic particles are attached to the copper bar by heating and screw extrusion by controlling parameters such as temperature and extrusion speed using an extruder. During extrusion, mica tape can be wrapped around the copper bar 4 to improve the copper bar 4's ability to prevent thermal runaway. In the sleeve process, the copper bar 4 is inserted into a heat shrink tube, which is then heated to form a protective layer 5. In the sleeve process, mica tape can also be wrapped around the copper bar 4 to improve the copper bar 4's ability to prevent thermal runaway. Hot pressing is to hot press PI film or PET film on the copper bar 4. Hot pressing can also wrap mica tape around the copper bar 4 to improve the copper bar 4's ability to prevent thermal runaway.

[0039] The fixing member 2 is formed as a whole into a cylindrical shape with both ends open, and is used to fix the copper bar protection sleeve 1 relative to the copper bar 4. The fixing member 2 includes a first fixing portion 21 and a second fixing portion 22, and the first fixing portion 21 and the second fixing portion 22 are respectively groove-shaped, specifically, including a bottom wall 23 and a side wall 24. By assembling the first fixing portion 21 and the second fixing portion 22, a hollow cylindrical fixing member 2 is formed. When the copper bar protection sleeve 1 is assembled to the copper bar 4, the copper bar 4 extends inside the fixing member 2, and the fixing member 2 covers a portion of the protective layer 5, so that the conductive part of the copper bar 4 is not exposed.

[0040] In this embodiment, the copper busbar 4 is formed in a curved shape, and the fixture 2 is also formed in a curved shape. By forming the fixture 2 in a curved shape, when the fixture 2 is fixed to the curved portion of the copper busbar 4, the relative movement between the fixture 2 and the copper busbar 4 is locked.

[0041] Specifically, the copper busbar 4 has a first portion 4a extending along a first direction and a second portion 4b extending along a second direction intersecting the first direction. Moreover, the fixture 2 is formed into a curved cylindrical shape, having a first cylindrical portion 2a along the first direction and a second cylindrical portion 2b along the second direction. The openings at both ends of the fixture 2 are respectively oriented toward directions intersecting each other, that is, toward the first direction and the second direction, respectively.

[0042] At this time, when the copper bar 4 wants to move in the first direction relative to the fixing member 2, the second portion 4b of the copper bar 4 is locked with the second cylindrical portion 2b of the fixing member 2, so that the movement of the copper bar 4 in the first direction relative to the fixing member 2 is locked. When the copper bar 4 wants to move in the second direction relative to the fixing member 2, the first portion 4a of the copper bar 4 is locked with the first cylindrical portion 2a of the fixing member 2, so that the movement of the copper bar 4 in the second direction relative to the fixing member 2 is locked. Thus, by forming the fixing member 2 into a curved shape, when the fixing member 2 is fixed to the curved portion of the copper bar 4, the relative movement between the fixing member 2 and the copper bar 4 is locked.

[0043] The first fixing portion 21 and the second fixing portion 22 are assembled with each other by means of the first clamping portion 25 and the first clamped portion 26. The first clamping portion 25 is provided at one of the first fixing portion 21 and the second fixing portion 22, and the first clamped portion 26 is provided at the other of the first fixing portion 21 and the second fixing portion 22. In the present embodiment, the first clamping portion 25 is provided at the first fixing portion 21, and the first clamped portion 26 is provided at the second fixing portion 22. Specifically, the first clamping portion 25 is provided at two side walls 24 of the first fixing portion 21, and the first clamped portion 26 is provided at two side walls 24 of the second fixing portion 22. And the copper busbar protective cover 1 is provided with a plurality of first clamping portions 25 and first clamped portions 26. In the present embodiment, as Figure 1 and Figure 3 As shown, a first engaging portion 25 and a first engaged portion 26 are respectively provided at the first portion 2a and the second portion 2b of the curved fixing member 2 on each side wall 24 .

[0044] like Figure 5 As shown, the first engaging portion 25 is frame-shaped and includes two cantilever portions 25a and a locking portion 25b. The two cantilever portions 25a extend from the side wall 24 of the first fixing portion 21 to the side wall 24 of the second fixing portion 22, and the locking portion 25b connects the ends of the two cantilever portions 25a. The first engaging portion 25 is made of a material that can be elastically deformed.

[0045] The first engaged portion 26 is in the shape of a protrusion, and the amount of protrusion from the side wall 24 of the second fixing portion 22 increases as it moves away from the first fixing portion 21, so that the first engaged portion 26 has a triangular cross-section. However, the second engaged portion 26 may be a simple protrusion.

[0046] When the first fixing part 21 and the second fixing part 22 are assembled, the locking part 25b of the first engaging part 25 moves along the upper surface of the first engaged part 26, so that the cantilever part 25a is deformed. During the engaging process, the closer the first fixing part 21 is to the second fixing part 22, the more the locking part 25b moves along the upper surface of the first engaged part 26, so that the deformation of the cantilever part 25a becomes larger. When the first fixing part 21 and the second fixing part 22 are assembled, the locking part 25b passes over the first engaged part 26 and surrounds the first engaged part 26 between two cantilever parts 25a and one locking part 25b. When the engaging is completed, if the first fixing part 21 and the second fixing part 22 move in the direction of separation from each other, the first engaged part 26 and the locking part 25b abut, thereby preventing the first fixing part 21 and the second fixing part 22 from moving in the direction of separation from each other.

[0047] In addition, in addition to the above-mentioned curved structure, the fixing means 2 and the copper busbar 4 are fixed in this embodiment by making the fixing means 2 and the copper busbar 4 contained in the fixing means 2 have an interference fit with the portion covered by the protective layer 5. The protective layer 5 is, for example, a material that can be slightly deformed, and the fixing means 2 can be fixed relative to the copper busbar 4 by the interference fit between the fixing means 2 and the protective layer 5 (the copper busbar 4 provided with the protective layer 5).

[0048] like Figure 2 As shown, in the case of interference fit, an anti-skid protrusion 27 may also be provided inside the fixing member 2, and the anti-skid protrusion 27 presses the copper bar 4 provided on the protective layer 5, thereby fixing the fixing member 2 relative to the copper bar 4, that is, the anti-skid protrusion 27 is squeezed and deformed to have an interference fit with the copper bar 4. In this case, since the anti-skid protrusion 27 that reduces the contact area with the protective layer 5 is provided, the friction resistance between the fixing member 2 and the protective layer 5 is also increased, so that the fixing member 2 can be fixed relative to the copper bar 4 more securely.

[0049] The anti-skid protrusion 27 may be formed integrally with the fixing member 2, or may be provided on the inner surface of the fixing member 2 after the fixing member 2 is formed by injection molding. The anti-skid protrusion 27 is, for example, made of an elastic material, such as rubber. The anti-skid protrusion 27 may also be made of a hard material, and the protective layer 5 is deformed by pressing.

[0050] In addition, a recess or a through hole may be provided in the copper busbar 4, and a protrusion may be provided at a position opposite to the recess or the through hole inside the cylindrical shape of the fixing member 2. When the fixing member 2 is fixed to the copper busbar 4, the fixing member 2 is fixed to the copper busbar 4 by the cooperation between the protrusion and the recess or the through hole.

[0051] In addition, if Figure 5 As shown, the protective cover 3 and the fixing member 2 are connected in a relatively rotatable manner through the second engaging portion 6 and the second engaged portion 7. The second engaging portion 6 is provided on one of the protective cover 3 and the fixing member 2, and the second engaged portion 7 is provided on the other of the protective cover 3 and the fixing member 2. In this embodiment, the second engaging portion 6 is provided on the protective cover 3, and the second engaged portion 7 is provided on the fixing member 2.

[0052] The protection cover 3 includes a main plate 31 and a side plate 32 . The side plate 32 is erected from the edge of the main plate 31 to form a receiving space. The copper busbar 4 is received in the receiving space.

[0053] The second engaging portion 6 is annular with a notch 61 and has a cross-sectional shape of Ω. It is fixed to the protective cover 3 via a connecting portion 62. In this example, the second engaging portion 6 is fixed to the end of the main board 31 close to the fixing member 2 via the connecting portion 62.

[0054] The second engaged portion 7 is disposed on the outer surface of the fixing member 2. Specifically, it is disposed on the surface on the side where the distance from the protective cover 3 becomes smaller when the protective cover 3 rotates relative to the fixing member 2 in a direction away from the copper busbar 4, and in the present invention, it is the outer surface of the bottom wall 23 of the first fixing portion 21.

[0055] like Figure 2 and Figure 5 As shown, the second engaged portion 7 includes two first rods 71 ​​erected from the outer surface of the bottom wall 23 of the first fixing portion 21 of the fixing member 2 and a second rod 72 connecting the ends of the two first rods 71. In this example, the second rod 72 is circular in cross section, and its diameter is greater than the width of the notch 61 of the second engaging portion 6. However, the second rod 72 may also be other shapes, and when the second rod 72 is also other shapes, the minimum cross-sectional width of the second rod 72 is less than the width of the notch 71.

[0056] When assembling the fixing member 2 and the protective cover 3, the notch 61 of the second engaging portion 6 is aligned with the second rod 72 of the second engaged portion 7 and pressure is applied, so that the second engaging portion 6 is deformed and the width of the notch 61 is widened, so that the second rod 72 can enter the interior of the second engaging portion 6. After the second rod 72 enters the interior of the second engaging portion 6, the notch 61 of the second engaging portion 6 returns to its original state due to elasticity, so that the second engaging portion 6 and the second engaged portion 7 are engaged.

[0057] At this time, the second engaging portion 6 can rotate around the second rod 72 of the second engaged portion 7 , so the protection cover 3 can rotate around the second rod 72 relative to the fixing member 2 .

[0058] Thus, when assembling the copper busbar 4 to the connection object, the operator can flip the protective cover 3 in the direction close to the fixing member 2 to expose the copper busbar 4 as a whole for connection operation. Moreover, after the connection operation is completed, the protective cover 3 can be put down to continue to protect the electrical connection end 41 of the copper busbar 4. During the entire connection process, since the protective cover 3 can be smoothly flipped relative to the fixing member 2, the force applied to the protective cover 3 by the operator will not be transmitted to the fixing member 2, so the fixing member 2 will not move relative to the copper busbar 4.

[0059] As a conventional example, there is a method of using the rubber cover 1A as a protective cover, such as Figure 4As shown, the conventional rubber sleeve 1A has a fixing portion 2A and a protective portion 3A, wherein the fixing portion 2A is cylindrical and fixed to the copper bar 4A by the elastic force of the rubber. When fixing the copper bar 4A to the connection object, the operator needs to open the protective portion 3A by hand to expose the copper bar 4A as a whole. At this time, since the fixing portion 2A and the protective portion 3A of the rubber sleeve 1A are integrally formed, the force applied by the operator to the protective portion 3A will be transmitted to the fixing portion 2A, so the fixing position of the fixing portion 2A and the copper bar 4A may be offset, affecting the subsequent anti-electric shock function.

[0060] In contrast, the copper busbar protective cover 1 of the present invention is provided with a separately formed fixing part 2 and a protective cover 3, and the two can be flipped relative to each other, so the operator will not affect the fixation of the fixing part 2 and the copper busbar 4 during operation, and thus will not affect the subsequent anti-electric shock function.

[0061] In addition, as an existing example, there is also a solution of directly forming a protective cover on the end of the copper busbar by injection molding. However, it is quite difficult and costly to directly form the fixing member 2 and the protective cover 3 in one piece by injection molding. Moreover, when such injection molding is used, if the copper busbar 4 is to be covered with a heat shrink tube or wrapped with a mica tape, the assembly is difficult.

[0062] The copper bar protection cover 1 of the present invention is formed into a molded fixing part 2 and a protective cover 3 respectively by injection molding, thereby reducing the technical difficulty of injection molding. Moreover, since the fixing part 2 and the protective cover 3 are assembled to the copper bar 4 by post-assembly, they will not hinder the extrusion processing, casing processing, heating processing and winding of mica tape used by the copper bar 4, so the application range is relatively wide.

[0063] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A copper busbar protective cover (1), characterized in that: have: A fixing member (2), which is in the shape of a tube with openings at both ends and is fixed to the copper busbar (4); and A protective cover (3), the protective cover (3) comprising a main board (31) and a side board (32), the side board (32) being erected from the edge of the main board (31) to form a receiving space, the protective cover (3) being capable of receiving the electrical connection end (41) of the copper busbar (4) in the receiving space, The protective cover (3) is connected to the fixing member (2) and can be turned over relative to the fixing member (2).

2. The copper busbar protective cover (1) according to claim 1, characterized in that: The fixing member (2) comprises a first fixing portion (21) and a second fixing portion (22), The first fixing portion (21) and the second fixing portion (22) are respectively groove-shaped, and the cylindrical fixing member (2) is formed by assembling the first fixing portion (21) and the second fixing portion (22).

3. The copper busbar protective cover (1) according to claim 2, characterized in that: A first engaging portion (25) is provided on one of the first fixing portion (21) and the second fixing portion (22), and a first engaged portion (26) is provided on the other of the first fixing portion (21) and the second fixing portion (22). By engaging the first engaging portion (25) and the first engaged portion (26), the first fixing portion (21) and the second fixing portion (22) are assembled into the fixing member (2) and fixed to the copper busbar (4).

4. The copper busbar protective cover (1) according to any one of claims 1 to 3, characterized in that: A second engaging portion (6) is provided on one of the fixing member (2) and the protective cover (3), and a second engaged portion (7) is provided on the other of the fixing member (2) and the protective cover (3). The protective cover (3) is connected to the fixing member (2) by engaging the second engaging portion (6) with the second engaged portion (7).

5. The copper busbar protective cover (1) according to claim 4, characterized in that: The second engaging portion (6) is annular and has a notch (61). The second engaged portion (7) comprises two first rods (71) erected from the other of the fixing member (2) and the protective cover (3) and a second rod (72) connecting the ends of the two first rods (71). The diameter of the second rod (72) is greater than the width of the notch (61).

6. The copper busbar protective cover (1) according to claim 5, characterized in that: The second engaging portion (6) is arranged on one side of the main board (31) of the protective cover (3).

7. The copper busbar protective cover (1) according to any one of claims 1 to 3, characterized in that: The fixing member (2) is in the shape of a curved cylinder, and the openings at both ends thereof are oriented in directions that intersect each other.

8. A copper busbar assembly (8), characterized in that: have: Copper busbar (4); A protective layer (5), the protective layer (5) covering a portion of the copper busbar (4) other than the electrical connection end (41); as well as The copper busbar protective sleeve (1) according to any one of claims 1 to 7, The fixing piece (2) of the copper busbar protective sleeve (1) covers the protective layer (5), and the protective cover (3) covers the electrical connection end (41) of the copper busbar (4) exposed from the protective layer (5).

9. The copper busbar assembly (8) according to claim 8, characterized in that: The fixing member (2) and the copper busbar (4) are fixed to each other by interference fit between the fixing member (2) and the portion of the copper busbar (4) covered by the protective layer (5).

10. The copper busbar assembly (8) according to claim 8 or 9, characterized in that: An anti-slip protrusion (27) is provided inside the fixing member (2), and the anti-slip protrusion (27) abuts against the protective layer (5) to fix the copper busbar (4).

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