Electrical connection device

Abstract

An electric connection device comprises a bus bar assembly and a connection assembly, and the bus bar assembly comprises a first bus bar and a second bus bar which are insulated from each other. The connecting assembly comprises two first plugs and two second plugs, and the two first plugs are arranged on the first bus bar in a spaced mode in the length direction of the first bus bar and face the opposite directions. The two second plugs are arranged on the second bus bar in a spaced mode in the length direction of the second bus bar and face the opposite directions respectively.

Description

Technical Field

[0001] The present invention relates to an electrical connection device, in particular to an electrical connection device for a bus bar. Background Art

[0002] In the technology disclosed in the Chinese invention patent with publication number CN109426326A, one end of the first connection bus and the second connection bus are electrically connected to the power distributor through a clamping electrical connector, and the other end is connected to the cabinet bus through the first output part and the second output part bent and extended relative to the first bus body and the second bus body, thereby realizing electrical connection with the cabinet bus, which is structurally complex.

[0003] In addition, due to the limited space usage of the server cabinet, this type of bus bar structure design takes up more space. Summary of the invention

[0004] Therefore, an object of the present invention is to provide an electrical connection device with a simpler structure.

[0005] Another object of the present invention is to provide an electrical connection device that can save space.

[0006] Therefore, the electrical connection device of the present invention includes a bus bar assembly and a connection assembly, the bus bar assembly includes a first bus bar and a second bus bar insulated from each other, the connection assembly includes two first plugs and two second plugs, the two first plugs are arranged on the first bus bar at intervals along a length direction of the first bus bar and face opposite directions respectively, and the two second plugs are arranged on the second bus bar at intervals along a length direction of the second bus bar and face opposite directions respectively.

[0007] In some embodiments, the first bus bar overlaps the second bus bar, and two ends of the first bus bar extend beyond two ends of the second bus bar respectively.

[0008] In some embodiments, the first bus bar overlaps the second bus bar, and one end of either the first bus bar or the second bus bar extends beyond one end of the other.

[0009] In some embodiments, the second bus bar includes a first plate and a second plate that are spaced apart from each other, and a fuse assembly disposed between the first plate and the second plate.

[0010] In some embodiments, the first plate and one end of the second plate are spaced apart and face each other, and the fuse assembly includes a fuse body and two locking plates protruding from both sides of the fuse body, and the two locking plates are respectively locked to one end of the first plate and the second plate facing each other.

[0011] In some embodiments, one end of the first plate and the second plate facing each other is bent and spaced apart from the first bus bar.

[0012] In some embodiments, one of the second plugs disposed on the second bus bar passes through the first bus bar.

[0013] In some embodiments, the first bus bar is provided with a through hole for the second plug to pass through, and the through hole has a larger diameter than the second plug, so that the second plug does not contact the first bus bar when passing through the through hole.

[0014] In some embodiments, an insulating layer is disposed on the inner edge of the through hole to prevent the second plug from contacting and electrically connecting with the first bus bar.

[0015] In some embodiments, an insulating layer is disposed between the first bus bar and the second bus bar to insulate each other.

[0016] In some embodiments, the electrical connection device further includes a docking bus bar assembly, which includes a third bus bar and a fourth bus bar, and the connection assembly also includes a plurality of first sockets arranged on the third bus bar and the fourth bus bar, and these first sockets provide a portion of these first plugs and second plugs for pluggable and floating connection, so that the bus bar assembly is electrically connected to the docking bus bar assembly.

[0017] In some embodiments, when the busbar assembly is electrically connected to the docking busbar assembly, an angle is formed between the length direction of the busbar assembly and the length direction of the docking busbar assembly.

[0018] In some embodiments, the busbar assembly is arranged in a transverse direction, and the docking busbar assembly is arranged in a longitudinal direction.

[0019] In some embodiments, the third bus bar and the fourth bus bar are in the shape of flat plates and are arranged side by side with their plate edges facing each other.

[0020] In some embodiments, the electrical connection device also includes a horizontally arranged circuit board, and the connection component also includes a plurality of second sockets arranged on the circuit board, and these second sockets are respectively provided for pluggable and floating connection of a portion of the first plug and the second plug, so that the bus bar assembly is electrically connected to the circuit board.

[0021] In some embodiments, the circuit board includes a board body and a conductive seat disposed on the board body, the conductive seat is upright relative to the board body, and the plurality of second sockets are disposed on the conductive seat.

[0022] In some embodiments, the first bus bar and the second bus bar are in a planar shape.

[0023] In some embodiments, each first plug has a mounting portion disposed on the first bus bar and a contact portion protruding from the mounting portion in a columnar shape, and the contact portions of these first plugs face in opposite directions; each second plug has a mounting portion disposed on the second bus bar and a contact portion protruding from the mounting portion in a columnar shape, and the contact portions of these second plugs face in opposite directions.

[0024] In some embodiments, the electrical connection device also includes a docking bus bar assembly, which includes a third bus bar and a fourth bus bar, and the connection assembly also includes a plurality of first sockets arranged on the third bus bar and the fourth bus bar, and these first sockets are provided for a part of these first plugs and the second plugs to be pluggable and floating, so that the bus bar assembly is electrically connected to the docking bus bar assembly; and a circuit board, which is arranged in a horizontal direction, and the connection assembly also includes a plurality of second sockets arranged on the circuit board, and these first sockets and these second sockets are respectively provided for these first plugs and these second plugs in opposite directions to be pluggable and floating, so that the docking bus bar assembly is electrically connected to the circuit board through the bus bar assembly.

[0025] In some embodiments, when the first plugs and the second plugs are plugged into the first sockets and the second sockets, they can float relative to the first sockets and the second sockets along a plugging direction and a radial direction perpendicular to the plugging direction.

[0026] In some embodiments, each first socket and second socket includes a seat, a barrel-shaped member, a pressure element and a contact member; the seat has a channel extending between two ends and an annular receiving groove extending outward from the channel, the barrel-shaped member has a barrel body with an outer diameter smaller than the channel, and an annular flange extending outward from the outer wall surface of the barrel body, the annular flange is movably accommodated in the annular receiving groove, the pressure element is elastic and is arranged between the annular flange of the barrel-shaped member and the annular receiving groove so that the barrel-shaped member can float in the channel along the plug-in direction, and the contact member is arranged in the barrel body of the barrel-shaped member; each first plug and second plug has a contact portion, which is inserted into the first socket and the second socket along the plug-in direction and contacts the contact member, and can float along the radial direction relative to the contact member.

[0027] The present invention simplifies the structure of the bus bar assembly being electrically connected to the docking bus bar assembly and the circuit board respectively by using a plurality of first and second plugs in opposite directions. In addition, the bus bar assembly is configured as a flat structure, and cooperates with the docking bus bar assembly, the plurality of first and second plugs and the first and second sockets, so that when the docking bus bar assembly needs to be electrically connected to the circuit board through the bus bar assembly, the distance between the docking bus bar assembly and the circuit board can be shortened, thereby reducing the space required to be occupied by the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0029] Figure 1 is a perspective view of a first embodiment of an electrical connection device of the present invention, illustrating that the electrical connection device includes two busbar assemblies, a pair of butt busbar assemblies, a connection assembly and a circuit board;

[0030] Figure 2 is a partial exploded view of the first embodiment, illustrating the two bus bar assemblies separated from the docking bus bar assembly;

[0031] Figure 3 , Figure 4 is a three-dimensional view and an exploded view of one of the busbar assemblies of the first embodiment;

[0032] Figure 5 , Figure 6 is a perspective view and an exploded view of another bus bar assembly of the first embodiment;

[0033] Figure 7 yes Figure 6 A cross-sectional view along the VII-VII direction in FIG. 1 illustrates a state in which the contact portion of the second plug passes through the first bus bar;

[0034] Figure 8 yes Figure 1 A cross-sectional view along the VIII-VIII direction in the figure illustrates a state where one of the second plugs is plugged into one of the second sockets;

[0035] Fig. 9 is a top view of the first embodiment;

[0036] Fig.10 is a perspective view of a second embodiment of the electrical connection device of the present invention, illustrating another implementation of the second bus bar of the two bus bar assembly of the electrical connection device;

[0037] Fig.11 , Fig.12 is a perspective view of the second embodiment, illustrating that a second bus bar of one of the bus bar assemblies of the electrical connection device includes a first plate, a second plate, and a fuse assembly disposed between the first plate and the second plate; and

[0038] Fig.13 , Fig.14 It is a stereoscopic view and an exploded view of the second embodiment, illustrating that the second busbar of another busbar assembly of the electrical connection device includes a first plate, a second plate, and a fuse assembly disposed between the first plate and the second plate.

[0039] Reference numerals list

[0040] 1. 1' busbar assembly

[0041] 10, 10' busbar assembly

[0042] 11, 11' first bus bar

[0043] 111 piercing

[0044] 12, 12' second bus bar

[0045] 120, 120' second busbar

[0046] 121, 121' first plate

[0047] 122, 122' first plate

[0048] 121a, 121a' one end

[0049] 122a, 122a' one end

[0050] 123 Fuse Kit

[0051] 124 Fuse body

[0052] 125 Locking piece

[0053] 126 Screws

[0054] 13 Insulation layer

[0055] 2 Docking busbar assembly

[0056] 21 Bus 3

[0057] 22 Bus 4

[0058] 3 Connecting components

[0059] 31 First Plug

[0060] 311, 321 installation department

[0061] 312, 322 contact parts

[0062] 32 Second plug

[0063] 33 First Socket

[0064] 331 base

[0065] Channel 331a

[0066] 331b Annular groove

[0067] 332 Barrel

[0068] 332a Barrel

[0069] 332b Annular flange

[0070] 333 Pressure element

[0071] 334 Contact

[0072] 334a Ring Head

[0073] 334b elastic contact piece

[0074] 335 fixing ring

[0075] 335a Clamping part

[0076] 335b Abutment

[0077] 34 Second socket

[0078] 4 Circuit Board

[0079] 41 plate body

[0080] 42 Conductive seat

[0081] 421 base

[0082] 422 pin

[0083] 5 Server chassis

[0084] L Length direction

[0085] I Plug direction DETAILED DESCRIPTION

[0086] Before the present invention is described in detail, it should be noted that in the following description, like elements are denoted by the same reference numerals.

[0087] See also Figure 1 , Figure 2The first embodiment of the electrical connection device of the present invention comprises two busbar assemblies 1, 1', a pair of docking busbar assemblies 2, a connection assembly 3 and a circuit board 4, wherein the docking busbar assembly 2 can be, for example, disposed in a server chassis 5, and provides electrical connection with the circuit board 4 through the busbar assemblies 1, 1' and the connection assembly 3. For ease of understanding, in the following description, the direction in which the busbar assemblies 1, 1' face the docking busbar assembly 2 is the front, and the direction in which the busbar assemblies face the circuit board 4 is the rear. In addition, in the following first embodiment, two different implementations of the busbar assemblies 1, 1' are cited for explanation in conjunction with two circuit boards 4. In other words, the docking busbar assembly 2 can be matched with a single set of busbar assemblies 1, or with multiple sets of busbar assemblies 1, 1', which are described in detail below.

[0088] See also Figure 2 , Figures 3 to 6 Each set of busbar components 1, 1' includes a first busbar 11, 11' and a second busbar 12, 12' that are insulated and stacked, and a locking component 14. In this embodiment, mutual insulation is achieved by providing an insulating layer 13 between the first busbar 11, 11' and the second busbar 12, 12'. The insulating layer 13 can be an insulating sheet, but in other variant embodiments, the insulating layer 13 can also be an insulating coating or insulating glue. The locking component 14 includes a screw 141 and a nut 142, which are used to lock each other, and sandwich the first busbar 11, 11', the second busbar 12, 12' and the insulating layer 13 therebetween. The locking component 14 is made of insulating material.

[0089] In this embodiment, if Figure 3 , Figure 4 As shown, when the first bus bar 11 and the second bus bar 12 of a set of bus bar assemblies 1 are overlapped, they are slightly staggered in the length direction L (that is, the left-right direction), so that one end of the first bus bar 11 and the second bus bar 12 extends beyond one end of the other, as shown in FIG. Figure 5 and Figure 6 As shown, the length of the first busbar 11' of another busbar assembly 1' is longer than the length of the second busbar 12', so when the first busbar 11' and the second busbar 12' are overlapped, the two ends of the first busbar 11' extend beyond the two ends of the second busbar 12' respectively.

[0090] The docking busbar assembly 2 includes a third busbar 21 and a fourth busbar 22 . In the present embodiment, the third busbar 21 and the fourth busbar 22 are flat-plate-shaped and are disposed in the server chassis 5 along the longitudinal direction, and are disposed side by side with their plate edges facing each other.

[0091] See also Figure 2 , Figure 4 , Figure 6 The connection assembly 3 includes a plurality of first plugs 31, a second plug 32, and a first socket 33, a second socket 34 respectively arranged on the docking busbar assembly 2 and the circuit board 4, and the first socket 33 and the second socket 34 provide the plurality of first plugs 31, the second plug 32 with pluggable and floating connection. In this embodiment, each of the first plug 31 and the second plug 32 includes a mounting portion 311, 321 arranged on each of the first and second busbars 11, 12, 11', 12' and a contact portion 312, 322 protruding from the mounting portion 311, 321 into a columnar shape, wherein the mounting portion 311, 321 is used to be fixed on each of the first and second busbars 11, 12, 11', 12', and the contact portion 312, 322 protrudes from the mounting portion 311, 321.

[0092] The number of the first plug 31 and the second plug 32 provided in each busbar assembly 1, 1' is two, and the two first plugs 31 are provided on the first busbars 11, 11' at intervals along the length direction L of the first busbars 11, 11' and face opposite directions respectively. In other words, the contact portion 312 of one of the first plugs 31 faces the docking busbar assembly 2 in the front, and the contact portion 312 of the other first plug 31 faces the circuit board 5 in the rear. The two second plugs 32 are also provided on the second busbars 12, 12' at intervals along the length direction L of the second busbars 12, 12' and face opposite directions respectively. direction, so the contact portion 322 of one of the second plugs 32 faces the docking busbar assembly 2 in the front, and the contact portion 322 of the other second plug 32 faces the circuit board 5 in the rear. In addition, in the busbar assembly 1, since one end of either the first busbar 11 or the second busbar 12 extends beyond one end of the other, one of the first plug 31 and the second plug 32 is arranged on the section where one end of the first busbar 11 and the second busbar 12 extends beyond, and the other of the first plug 31 and the second plug 32 is arranged on the section where the first busbar 11 and the second busbar 12 overlap and face each other.

[0093] In another busbar assembly 1 ', see Figures 5 to 7Since the second busbar 12' is shorter, one of the second plugs 32 must pass through the first busbar 11', and since the first busbar 11' and the second busbar 12' are used to transmit currents of different polarities, in order to avoid short circuit, the first busbar 11' is provided with a through hole 111 for the contact portion 322 of one of the second plugs 32 located on the second busbar 12' to pass through, and the aperture of the through hole 111 is larger than that of the second plug 32, so that the contact portion 322 of the second plug 32 does not contact the first busbar 11' when passing through the through hole 111. More advantageously, an insulating layer (not shown) can also be provided on the inner edge of the through hole 111 to prevent the second plug 32 from contacting and electrically connecting with the first busbar 11'.

[0094] In this embodiment, the circuit board 4 is arranged in a horizontal direction and includes a board body 41 and a conductive seat 42 arranged on the board body 41. The conductive seat 42 is upright relative to the board body 41 and is electrically connected to the board body 41. The conductive seat 42 includes a seat body 421 with a U-shaped cross-section and a pin 422 arranged at the bottom of the seat body 421. The conductive seat 42 is inserted into the board body 41 through the pin 422 to form an electrical connection.

[0095] The multiple first sockets 33 are respectively arranged on the third bus bar 21 and the fourth bus bar 22 of the docking bus bar assembly 2, so as to be plugged into the multiple first plugs 31 and the second plugs 32 facing the docking bus bar assembly 2, so that the bus bar assembly 1, 1' is electrically connected to the docking bus bar assembly 2. The multiple second sockets 34 are arranged on the conductive seat 42 of the circuit board 4, so as to be plugged into the multiple first plugs 31 and the second plugs 32 facing the circuit board 4, so that the docking bus bar assembly 2 is electrically connected to the circuit board 4 through the bus bar assemblies 1, 1'.

[0096] See also Figure 1 , Figure 2 , Figure 8 The third socket 33 has the same structure as the fourth socket 34. Figure 8 Taking the fourth socket 34 as an example, each of the first socket 33 and the second socket 34 includes a seat body 341, a barrel 342, two pressure elements 343, a contact member 344, and a fixing ring 345. The first socket 33 is fixed to the third bus bar 21 and the fourth bus bar 22 through its seat body 341, and the second socket 34 is fixed to the seat body 421 of the conductive seat 42 through its seat body 341.

[0097] The contact portions 312 and 322 of the first plug 31 and the second plug 32 are used to be inserted into the barrel-shaped member 342 of the first socket 33 and the second socket 34 along a plugging direction I (i.e., the front-to-back direction) and contact the contact member 344 ( Figure 8Only the state where a second plug 32 of one of the first busbar assemblies 1 is inserted into a fourth socket 34 is illustrated as an example. The seat body 341 has a channel 341a extending between two ends and an annular receiving groove 341b extending outward from the channel 341a. The barrel-shaped member 342 has a barrel body 342a with an outer diameter smaller than that of the channel 341a, and an annular flange 342b extending outward from the outer wall surface of the barrel body 342a, and the annular flange 342b is movably accommodated in the annular receiving groove 341b. The two pressure-applying elements 343 are elastic and are disposed between the annular flange 342b of the barrel-shaped member 342 and the annular receiving groove 341b, so that the barrel-shaped member 342 can float in the channel 341a. Specifically, in the present embodiment, the two pressure elements 343 are wave spring rings and are respectively disposed on the two end surfaces of the annular flange 342b in the plug-in direction I, so that the barrel-shaped member 342 can float in the channel 341a in the radial direction perpendicular to the plug-in direction I. However, in other embodiments, these pressure elements 343 can be other existing elastic elements that can be used to apply pressure, and the number of the pressure elements 343 can be one or more than three, and is not limited to the first embodiment.

[0098] The contact piece 344 is disposed in the barrel body 342a of the barrel-shaped piece 342 and is provided for the contact portions 312, 322 of the first plug 31 and the second plug 32 to extend through. The contact piece 344 has an annular head 344a disposed on the inner wall surface of the barrel body 342a adjacent to one end edge of the barrel body 342a, and a plurality of elastic contact pieces 344b extending from the annular head 344a toward the other end edge of the barrel body 342a and inwardly obliquely for contacting the contact portions 312, 322. The fixing ring 345 and the barrel body 342a of the barrel-shaped member 342 jointly clamp the annular head 344a of the contact member 344 to fix the contact member 344 in the barrel-shaped member 342. Specifically, the fixing ring 345 has a clamping portion 345a that is annular and clamps the annular head 344a of the contact member 344 together with the inner wall surface of the barrel body 342a, and a butting portion 345b that extends outward from the end edge of the clamping portion 345a and abuts against the end edge of the barrel body 342a. Specifically, since the contact portions 312 and 322 of the first plug 31 and the second plug 32 penetrate and contact the contact member 344 along the plugging direction I, the contact portions 312 and 322 of the first plug 31 and the second plug 32 can float along the plugging direction I and float relative to the contact member 344.

[0099] In the present embodiment, the docking busbar assembly 2 is arranged longitudinally, and the plurality of busbar assemblies 1, 1' are arranged transversely. When the busbar assemblies 1, 1' are electrically connected to the docking busbar assembly 2, they are perpendicular to the direction of the docking busbar assembly 2. However, in other embodiments, the arrangement directions of the docking busbar assembly 2 and the busbar assemblies 1, 1' may also intersect each other at an angle in the length direction but not be perpendicular depending on the actual use environment and requirements.

[0100] See also Fig.10 , which is a second embodiment of the electrical connection device of the present invention. The two busbar assemblies 10 , 10 ′ are also electrically connected to the third busbar 21 and the fourth busbar 22 of the docking busbar assembly 2 and the circuit board 4 through the first plug 31 and the second plug 32 .

[0101] See also Figures 11 to 14 The difference between the second embodiment and the first embodiment is that, in the first embodiment, the second busbar 12, 12' of each busbar assembly 1, 1' is in the form of a single plate, while in the second embodiment, each second busbar 120, 120' includes a first plate 121, 121', a second plate 122, 122' spaced apart from each other, and a fuse assembly 123 disposed between the first plate 121, 121' and the second plate 122, 122', and the second busbar 120, 120' serves as a live line path. Two second plugs 32 are spaced apart from each other along the length direction L of each second busbar 120, 120' and are disposed on the first plate 121, 121' and the second plate 122, 122' of each second busbar 120, 120' and face opposite directions respectively. The locking assembly 1 includes a screw 141 and a nut 142 for locking each other and locking the first plate 121 , 121 ′ and the second plate 122 , 122 together with the insulating layer 13 to the first busbar 11 , 11 ′.

[0102] The fuse assembly 123 includes a fuse body 124 and two locking pieces 125 protruding from both sides of the fuse body 124. In the second bus bar 120, the two locking pieces 125 are respectively locked to the ends 121a and 122a of the first plate 121 and the second plate 122 facing each other by screws 126. In the second bus bar 120', the two locking pieces 125 are respectively locked to the ends 121a' and 122a' of the first plate 121' and the second plate 122' facing each other by screws 126. Taking the second bus bar 120 as an example, in order to lock the fuse assembly 123, the first plate 121 of the second bus bar 120 and the second plate 122 are respectively locked to the ends 121a' and 122a' of the first plate 121' and the second plate 122'. The ends 121a and 122a of the second plate 122 facing each other are bent, and when the first plate 121 and the second plate 122 are locked on the first bus bar 11, the ends 121a and 122a of the first plate 121 and the second plate 122 facing each other are spaced from the first bus bar 11. Similarly, the ends 121a' and 122a' of the first plate 121' and the second plate 122' of the second bus bar 120' facing each other are bent, and when the first plate 121 and the second plate 122 are locked on the first bus bar 11, the ends 121a' and 122a' of the first plate 121' and the second plate 122' facing each other are spaced from the first bus bar 11'. Furthermore, in the second embodiment, the first plates 121 , 121 ′ and the second plates 122 , 122 ′ of each second bus bar 120 , 120 ′ may also be coated with an insulating layer at other locations except for the facing ends 121 a , 122 a , 121 a ′, 122 a ′.

[0103] In the second embodiment, by setting the fuse assembly 123 on the second busbar 120, 120' of the busbar assembly 1, 1', in addition to saving space for setting the fuse assembly 123 on the circuit board, when the current flowing to the circuit board is too large, the fuse assembly 123 can block it and prevent the excessive current from damaging the electronic components of the circuit board.

[0104] See also Figure 1 , Figure 2 , Fig. 9 As described above, the present application simplifies the structure of the busbar components 1 and 1' being electrically connected to the docking busbar component 2 and the circuit board 4 by using the multiple first plugs 31 and the second plugs 32 in opposite directions. In addition, by setting the busbar components 1 and 1' as a flat structure, and coordinating the arrangement of the docking busbar component 2, the multiple first plugs 31 and the second plugs 32 and the first socket 33 and the second socket 34, when the docking busbar component 2 needs to be electrically connected to the circuit board 4 through the busbar components 1 and 1', the distance between the docking busbar component 2 and the circuit board 4 can be shortened, thereby reducing the space required for the entire system, so the purpose of the present invention can be achieved.

[0105] Furthermore, in the second embodiment, by disposing the fuse assembly 123 on the second busbars 120 , 120 ′ of the busbar assemblies 1 , 1 ′, space for disposing the fuse assembly 123 on the circuit board can be saved and overcurrent can be prevented from damaging electronic components on the circuit board.

[0106] However, it should be understood that the above description is only an embodiment of the present invention, and the scope of implementation of the present invention cannot be limited thereto. All simple equivalent changes and modifications made according to the claims and the contents of the patent specification of the present invention are still within the scope of the patent of the present invention.

Claims

1. An electrical connection device, comprising: A bus bar assembly, comprising a first bus bar and a second bus bar insulated from each other; as well as A connection assembly comprising: Two first plugs are arranged on the first bus bar at intervals along a length direction of the first bus bar and face opposite directions respectively; as well as The two second plugs are arranged on the second bus bar at intervals along a length direction of the second bus bar and face opposite directions respectively.

2. The electrical connection device according to claim 1, wherein: The first bus bar is overlapped with the second bus bar, and two ends of the first bus bar extend beyond two ends of the second bus bar respectively.

3. The electrical connection device according to claim 1, wherein: The first bus bar overlaps with the second bus bar, and one end of either the first bus bar or the second bus bar extends beyond one end of the other.

4. The electrical connection device according to any one of claims 1 to 3, wherein: The second bus bar includes a first plate and a second plate spaced apart from each other, and a fuse assembly disposed between the first plate and the second plate.

5. The electrical connection device according to claim 4, wherein: One end of the first plate is spaced apart from and faces one end of the second plate. The fuse assembly includes a fuse body and two locking plates protruding from both sides of the fuse body. The two locking plates are respectively locked to the ends of the first plate and the second plate facing each other.

6. The electrical connection device according to claim 5, wherein: The ends of the first plate and the second plate facing each other are bent and spaced apart from the first bus bar.

7. The electrical connection device according to claim 2, wherein: A second plug disposed on the second bus bar passes through the first bus bar.

8. The electrical connection device according to claim 7, wherein: The first bus bar is provided with a through hole for the second plug to pass through, and the aperture of the through hole is larger than that of the second plug, so that the second plug does not contact the first bus bar when passing through the through hole.

9. The electrical connection device according to claim 8, wherein: An insulating layer is disposed on the inner edge of the through hole to prevent the second plug from contacting with the first bus bar and being electrically connected.

10. The electrical connection device according to claim 1, wherein: An insulating layer is disposed between the first bus bar and the second bus bar to insulate each other.

11. The electrical connection device as described in claim 1 further includes a docking busbar assembly, the docking busbar assembly includes a third busbar and a fourth busbar, and the connection assembly also includes a plurality of first sockets arranged on the third busbar and the fourth busbar, the plurality of first sockets are provided for a portion of the first plug and the second plug to be pluggable and floating, so that the busbar assembly is electrically connected to the docking busbar assembly.

12. The electrical connection device according to claim 11, wherein: When the busbar assembly is electrically connected to the butted busbar assembly, an angle is formed between the length direction of the busbar assembly and the length direction of the butted busbar assembly.

13. The electrical connection device according to claim 12, wherein: The busbar assembly is arranged in a transverse direction, and the butt-jointed busbar assembly is arranged in a longitudinal direction.

14. The electrical connection device according to claim 11, wherein: The third bus bar and the fourth bus bar are in the shape of flat plates and are arranged side by side with their plate edges facing each other.

15. The electrical connection device as described in claim 1 further includes a horizontally arranged circuit board, and the connection component also includes a plurality of second sockets arranged on the circuit board, and the plurality of second sockets are respectively provided for a part of the first plug and the second plug to be pluggable and floating, so that the bus bar assembly is electrically connected to the circuit board.

16. The electrical connection device according to claim 15, wherein: The circuit board comprises a board body and a conductive seat arranged on the board body. The conductive seat is arranged upright relative to the board body, and the plurality of second sockets are arranged on the conductive seat.

17. The electrical connection device according to claim 1, wherein: The first bus bar and the second bus bar are in a flat plate shape.

18. The electrical connection device according to claim 1, wherein: Each of the first plugs has a mounting portion disposed on the first bus bar and a contact portion protruding from the mounting portion in a columnar shape, and the contact portions of the two first plugs face opposite directions; each of the second plugs has a mounting portion disposed on the second bus bar and a contact portion protruding from the mounting portion in a columnar shape, and the contact portions of the two second plugs face opposite directions.

19. The electrical connection device according to claim 1, further comprising: A docking busbar assembly, the docking busbar assembly comprising a third busbar and a fourth busbar, and the connection assembly further comprising a plurality of first sockets disposed on the third busbar and the fourth busbar, the plurality of first sockets being provided for a portion of the first plug and the second plug to be pluggable and floatingly connected, so that the busbar assembly is electrically connected to the docking busbar assembly; and A circuit board is arranged in a horizontal direction, and the connection component also includes a plurality of second sockets arranged on the circuit board, the plurality of first sockets and the plurality of second sockets respectively provide for the first plugs and the second plugs in opposite directions to be pluggable and floatingly connected, so that the docking bus bar assembly is electrically connected to the circuit board through the bus bar assembly.

20. The electrical connection device according to claim 19, wherein: When the first plug and the second plug are plugged into the first sockets and the second sockets, they can float relative to the first sockets and the second sockets along a plugging direction and a radial direction perpendicular to the plugging direction.

21. The electrical connection device according to claim 20, wherein: Each of the first socket and the second socket includes a seat, a barrel-shaped member, a pressure element and a contact member; the seat has a channel extending between two ends and an annular receiving groove extending outward from the channel, the barrel-shaped member has a barrel body with an outer diameter smaller than the channel, and an annular flange extending outward from the outer wall surface of the barrel body, the annular flange can be movably accommodated in the annular receiving groove, the pressure element is elastic and is arranged between the annular flange of the barrel-shaped member and the annular receiving groove, so that the barrel-shaped member can float in the channel along the plug-in direction, and the contact member is arranged in the barrel body of the barrel-shaped member; each of the first plug and the second plug has a contact portion, the contact portion is inserted into the first socket and the second socket along the plug-in direction and contacts the contact member, and can float along the radial direction relative to the contact member.

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