CN116131046A

CN116131046A - Laminated busbar

Info

Publication number: CN116131046A
Application number: CN202211093882.1A
Authority: CN
Inventors: 邓华森; 李勋; 陈浩舟; 李彪; 邹大中
Original assignee: Electric Vehicle Service of Southern Power Grid Co Ltd
Current assignee: Electric Vehicle Service of Southern Power Grid Co Ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-05-16

Abstract

The invention relates to a laminated busbar. The laminated busbar includes three electrically conductive members disposed in a laminated arrangement and extending in a first direction, any adjacent two electrically conductive members being electrically isolated from each other. Wherein the three electrically conductive members are arranged offset along the first direction. The opposite ends of each electric conduction part along the first direction are respectively provided with a first wiring terminal and a second wiring terminal which extend along the second direction, any two adjacent first wiring terminals are arranged at intervals, and any two adjacent second wiring terminals are arranged at intervals. All first binding posts are connected to the alternating current input end of the contactor, and all second binding posts are connected to the alternating current input end of the circuit breaker. And the first direction and the second direction intersect each other. The laminated busbar has the advantages of small number of copper bars, small size, low cost, few contact points and low failure rate.

Description

Laminated busbar

Technical Field

The invention relates to the technical field of manufacturing of charging piles, in particular to a laminated busbar.

Background

With the rapid development of electric vehicles, charging facilities such as dc charging piles are matched with the electric vehicles. The direct current pile is a power supply device which is fixedly arranged outside the electric automobile and connected with an alternating current power grid and can provide direct current power for a power battery of the electric automobile, the direct current charging pile can provide enough power, the output voltage and current adjustment range is large, and the requirement of quick charging can be met.

In the related art, a copper bar connection method is mostly adopted for a breaker and a contactor of the direct current charging pile. The common copper bar connection is in view of safety, enough electric gaps are required to be reserved, so that the copper bar is longer in size and higher in height, the height of the cabinet body is increased, and the cost of the whole pile is higher; and copper bars are in a large number, contact connection points are in a large number, and assembly and maintenance are complicated.

Disclosure of Invention

Based on the problems, such as large number of copper bars, large size, high cost, large number of contact points, high failure rate and the like caused by the fact that a circuit breaker and a contactor of the conventional direct current charging pile are connected by copper bars, the laminated busbar with the small number of copper bars, small size, low cost, few contact points and low failure rate is needed.

A laminated busbar for connecting a contactor to an ac input of a circuit breaker, the laminated busbar comprising three electrically conductive members arranged in a stack and extending in a first direction, any adjacent two of the electrically conductive members being electrically isolated from each other;

wherein three of the electrically conductive members are arranged in a staggered manner along the first direction;

each of the electrically conductive members has first and second terminals extending in the second direction at opposite ends thereof in the first direction, and any two adjacent first terminals are spaced apart from each other and any two adjacent second terminals are spaced apart from each other;

all the first wiring terminals are connected to the alternating current input end of the contactor, and all the second wiring terminals are connected to the alternating current input end of the circuit breaker;

the first direction and the second direction intersect each other.

In one embodiment, the contactor and the circuit breaker each include W, V, U three-phase ac inputs disposed sequentially along the first direction;

the three electric conduction parts comprise a first electric conduction part, a second electric conduction part and a third electric conduction part;

the first wiring terminal and the second wiring terminal of the first electric conduction component are respectively and electrically connected with the W-phase alternating current input ends of the contactor and the circuit breaker;

the first wiring terminal and the second wiring terminal of the second electric conduction component are respectively and electrically connected with the contactor and the V-shaped alternating current input end of the circuit breaker;

the first and second terminals of the third electrically conductive member are electrically connected to the contactor and the U-phase ac input of the circuit breaker, respectively.

In one embodiment, the outer surface of the portion of the first terminal in contact with the corresponding W, V, U three-phase ac input of the contactor is tin plated, and the outer surface of the portion of the second terminal in contact with the W, V, U three-phase ac input of the circuit breaker is tin plated.

In one embodiment, the first connection terminal and the corresponding electric conduction component and the second connection terminal and the corresponding electric conduction component are connected in a round angle mode.

In one embodiment, the electrical conduction member includes a main body portion extending in a first direction, connection portions connected to opposite ends of the main body portion in the first direction and extending in a third direction, the first connection terminal, and the second connection terminal;

the first wiring terminal and the second wiring terminal are both connected to one side, away from the main body, of the connecting part positioned on the same side in the first direction;

wherein the first direction, the second direction and the third direction are intersected in pairs.

In one embodiment, the first connection terminal and the second connection terminal are both bent in the second direction relative to the connection portion located on the same side in the first direction.

In one embodiment, the main body portion, the connection portion, the first connection terminal, and the second connection terminal are integrally formed.

In one embodiment, the material of the electrically conductive member comprises copper or aluminum.

In one embodiment, a layer of insulating material is provided between any adjacent two of said electrically conductive members.

In one embodiment, the insulating material layer includes an insulating coating layer and an insulating glue layer laminated to an outer surface of the electrically conductive member.

The laminated busbar comprises three electric conduction parts which are arranged in a laminated mode, the three electric conduction parts are arranged in a staggered mode along the first direction, and any two adjacent electric conduction parts are electrically isolated from each other. In this way, any two adjacent electrically conductive members are electrically isolated from each other, ensuring electrical safety. The arrangement method of the three electric conduction components reduces the height of the laminated busbar as much as possible. The staggered arrangement of the three electrically conductive members along the first direction reduces the length of the stacked busbar. The occupied space is saved, the material consumption of the electric conduction component is reduced, and the cost of the whole pile is reduced. Compared with the prior copper bar connection mode, the number of connection points is reduced from 12 to 6, so that half of connection points are reduced, the assembly and disassembly of the laminated busbar are quicker, fault points are reduced while the laminated busbar is quickly assembled and disassembled, and the safety and reliability are higher.

Drawings

FIG. 1 is a schematic front view illustrating a connection structure of a common copper bar according to an embodiment of the present invention;

FIG. 2 is a schematic left-hand view of a conventional copper bar connection structure according to an embodiment of the present invention;

FIG. 3 is an isometric view of a conventional copper bar connection structure according to an embodiment of the present invention;

FIG. 4 is a front view schematically illustrating a connection structure of a stacked busbar according to an embodiment of the present invention;

FIG. 5 is a schematic left-hand view of a connection structure of a stacked busbar according to an embodiment of the present invention;

FIG. 6 is an isometric view of a connection structure of a laminated busbar according to an embodiment of the invention;

FIG. 7 is a diagram showing electrical connections between stacked busbar according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of insulation of a stacked busbar at one view angle in an embodiment of the invention;

fig. 9 is an insulation schematic diagram of a laminated busbar according to another view angle in an embodiment of the present invention.

In the figure: 100. laminating a busbar; 200. a contactor; 300. a circuit breaker; 400. a copper bar; f1, a first direction; f2, a second direction; f3, a third direction; 10. an electrical conducting member; 210. an ac input of the contactor; 310. an ac input of the circuit breaker; 11. a first electrically conductive member; 12. a second electrical conducting member; 13. a third electrical conducting member; 14. a first connection terminal; 15. a second connection terminal; 16. round corners; 17. a main body portion; 18. a connection part; 19. and an insulating material layer.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless otherwise indicated

The terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

FIG. 1 is a schematic front view illustrating a connection structure of a common copper bar according to an embodiment of the present invention; FIG. 2 is a schematic left-hand view of a conventional copper bar connection structure according to an embodiment of the present invention; fig. 3 is an isometric view of a connection structure of a common copper bar according to an embodiment of the invention.

Referring to fig. 1-3, the current dc pile circuit breaker 300 and contactor 200 are mostly connected by copper bars 400, and the related art circuit breaker 300 and contactor 200 of the dc charging pile are mostly connected by copper bars 400. For safety reasons, the common copper bars 400 are connected, and enough electric gaps need to be reserved, so that the copper bars 400 are longer in size and higher in height, the height of the cabinet body is increased, and the cost of the whole pile is higher; and copper bars 400 are more in number, contact connection points are more (12 bolt connection points are shown in fig. 1), and assembly and maintenance are complicated.

In view of the problems associated with the conventional dc-pile circuit breaker 300 and contactor 200 using the copper bar 400, the inventors of the present application devised a laminated busbar 100 that could solve at least one of the above problems.

FIG. 4 is a front view of a connection structure of the laminated busbar 100 according to an embodiment of the present invention; FIG. 5 is a schematic left-hand view of a connection structure of the laminated busbar 100 according to an embodiment of the present invention; fig. 6 is an isometric view of a connection structure of the laminated busbar 100 according to an embodiment of the invention.

Referring to fig. 4-6 together, an embodiment of the present invention provides a laminated busbar 100 for connecting a contactor 200 and an ac input terminal 310 of a circuit breaker, where the laminated busbar 100 includes three electrically conductive members 10 disposed in a laminated manner and extending along a first direction F1, and any two adjacent electrically conductive members 10 are electrically isolated from each other. Wherein the three electrically conductive members 10 are arranged offset in the first direction F1. Each of the electrically conductive members 10 has first and

second connection terminals

14 and 15 extending in the second direction F2 at opposite ends thereof in the first direction F1, respectively, and any adjacent two of the first connection terminals 14 are disposed at a distance from each other, and any adjacent two of the second connection terminals 15 are disposed at a distance from each other. All the first terminals 14 are connected to the ac input 210 of the contactor and all the second terminals 15 are connected to the ac input 310 of the circuit breaker. And the first direction F1 and the second direction F2 intersect each other.

The laminated busbar 100 includes three electrically conductive members 10 arranged in a laminated manner, the three electrically conductive members 10 being arranged offset in the first direction F1, and any two adjacent electrically conductive members 10 being electrically isolated from each other. In this way, any two adjacent electrically conductive members 10 are electrically isolated from each other, ensuring electrical safety. The arrangement of the three electrically conductive members 10 in a stacked arrangement minimizes the height of the stacked busbar 100. The offset arrangement of the three electrical conducting members 10 along the first direction F1 reduces the length of the laminated busbar 100. I.e. saves space, reduces the material consumption of the electrical conducting member 10 and reduces the cost of the whole pile. And compared with the prior copper bar 400, the number of connection points is reduced from 12 to 6, and half of connection points are reduced, so that the assembly and disassembly of the laminated busbar 100 are quicker, the fault points are reduced while the assembly and disassembly are quick, and the safety and reliability are higher.

In some embodiments, as shown in fig. 7, fig. 7 is an electrical connection diagram of the laminated busbar 100 according to an embodiment of the present invention. The contactor 200 and the circuit breaker 300 each include W, V, U three-phase ac inputs disposed sequentially in the first direction F1. The three electrically conductive members 10 include a first electrically conductive member 11, a second electrically conductive member 12, and a third electrically conductive member 13. The first connection terminal 14 and the second connection terminal 15 of the first electrically conductive member 11 are electrically connected to W-phase alternating current input ends of the contactor 200 and the circuit breaker 300, respectively. The first and

second terminals

14 and 15 of the second electrically conductive member 12 are electrically connected to V-phase alternating current input ends of the contactor 200 and the circuit breaker 300, respectively. The first and

second terminals

14 and 15 of the third electrically conductive member 13 are electrically connected to the U-phase ac input terminals of the contactor 200 and the circuit breaker 300, respectively.

It will be appreciated that, as shown in fig. 7, the three phases W, V, U of the circuit breaker 300 and the contactor 200 are connected in a one-to-one correspondence using the electrically conductive members 10, so that the staggered arrangement reduces the length of the electrically conductive members 10, reduces the material consumption of the electrically conductive members 10, and reduces the overall piling cost.

In some embodiments, as shown in fig. 8-9, fig. 8 is an insulation schematic diagram of a stacked busbar 100 at a viewing angle in an embodiment of the present invention; fig. 9 is an insulation schematic diagram of a laminated busbar 100 according to another view angle in an embodiment of the present invention. The outer surface of the portion of the first connection terminal 14 in contact with the W, V, U three-phase ac input of the corresponding contactor 200 is tin plated, and the outer surface of the portion of the second connection terminal 15 in contact with the W, V, U three-phase ac input of the circuit breaker 300 is tin plated.

The surface of the electrically conductive member 10 needs to be treated, and the surface of the electrically conductive member 10 must be clean and free of foreign matter, and may not have defects such as burrs and pits. In one embodiment, the surface of the electrically conductive member 10 is tin plated by 5-10um so that the electrically conductive member 10 has good electrical conductivity. Of course, the surface plating material of the electrically conductive member 10 is not limited to this, and may be other materials having good electrical conductivity, for example, nickel, silver, or the like.

In some embodiments, as shown in fig. 5, 6 and 9, the first connection terminal 14 and the corresponding electrically conductive member 10, and the second connection terminal 15 and the corresponding electrically conductive member 10 are each connected with a rounded corner 16.

In some embodiments, as shown in fig. 6 and 9, the electrical conduction member 10 includes a main body portion 17 extending in the first direction F1, connection portions 18 connected to opposite ends of the main body portion 17 in the first direction F1 and extending in the third direction F3, a first connection terminal 14, and a second connection terminal 15. The first connection terminal 14 and the second connection terminal 15 are both connected to a side of the connecting portion 18 located on the same side in the first direction F1 away from the main body portion 17. The first direction F1, the second direction F2 and the third direction F3 intersect each other two by two.

In one embodiment, the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other. Thus, the space occupied by the laminated busbar 100 is smaller, and the cost of the whole pile is saved.

In some embodiments, as shown in fig. 6 and 9, the first connection terminal 14 and the second connection terminal 15 are bent along the second direction F2 at the connection portion 18 located on the same side of the first direction F1.

In some embodiments, as shown in fig. 6 and 9, the main body 17, the connection portion 18, the first connection terminal 14, and the second connection terminal 15 are integrally formed.

It can be understood that, compared with the prior art, as shown in fig. 1, the main body 17, the connecting portion 18, the first connecting terminal 14 and the second connecting terminal 15 are integrally formed by adopting a split type connection method of bolting the main body 17 and the connecting portion 18, so that the number of connection points is reduced from 12 to 6, half of connection points are reduced, the disassembly and assembly of the laminated busbar 100 are faster, fault points are reduced while the disassembly and assembly are fast, and the safety and reliability are higher.

In some embodiments, the material of the electrically conductive member 10 comprises copper or aluminum.

In one embodiment, the material of the electrically conductive member 10 is copper, specifically T2 red copper. The alloy has good electric conduction, heat conduction, corrosion resistance and processability, and can be welded and soldered.

In some embodiments, as shown in fig. 8 and 9, a layer of insulating material 19 is provided between any adjacent two of the electrically conductive members 10.

As shown in fig. 8 and 9, the area of the electrical conduction member 10 in contact with the contactor 200 and the circuit breaker 300, which includes the front and rear surfaces of the first and

second terminals

14 and 15 and the inner hole surfaces of the bolt holes, is only tin plated. I.e. square grid areas as shown in fig. 8 and 9. Thus ensuring good electrical conductivity.

And a layer of insulating material 19 is provided between any adjacent two of the electrically conductive members 10. Thus, good safety insulation protection is ensured. Specifically, the outer surface of the electrically conductive member 10 needs to be provided with an insulating layer except for the above-described areas (the front surface, the rear surface, and the inner hole surface of the bolt hole of the first connection terminal 14 and the second connection terminal 15).

In some embodiments, as shown in fig. 8 and 9, the insulating material layer 19 includes an insulating coating and an insulating glue layer that are laminated to the outer surface of the electrically conductive member 10.

In a specific embodiment, the outer surface of the electrically conductive member 10 is coated with a cured epoxy resin and then with an insulating paste, and any adjacent electrically conductive members 10 are filled with a PET (mylar) insulating material. Thus, good safety insulation protection can be ensured.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A laminated busbar for connecting a contactor to an ac input of a circuit breaker, the laminated busbar comprising three electrically conductive members arranged in a laminated relationship and extending in a first direction, any adjacent two of the electrically conductive members being electrically isolated from each other;

the first direction and the second direction intersect each other.

2. The laminated busbar of claim 1, wherein the contactor and the circuit breaker each comprise W, V, U three-phase ac inputs disposed sequentially along the first direction;

3. The laminated busbar of claim 2, wherein the first terminal is tin plated on the outer surface of the portion of the corresponding contact that is in contact with the W, V, U three-phase ac input of the contactor, and the second terminal is tin plated on the outer surface of the portion of the corresponding contact that is in contact with the W, V, U three-phase ac input of the circuit breaker.

4. The laminated busbar of claim 1, wherein the first connection terminal and the corresponding electrically conductive member and the second connection terminal and the corresponding electrically conductive member are each connected by rounded corners.

5. The laminated busbar of claim 4, wherein the electrical conductive member includes a main body portion extending in a first direction, connection portions connected to opposite ends of the main body portion in the first direction and extending in a third direction, the first connection terminal, and the second connection terminal;

6. The laminated busbar of claim 5, wherein the first and second terminals are each bent in the second direction with respect to the connection portion on the same side in the first direction.

7. The laminated busbar of claim 5, wherein the main body portion, the connecting portion, the first connection terminal, and the second connection terminal are integrally formed.

8. The laminated busbar of any of claims 1 to 7, wherein the electrically conductive member comprises copper or aluminum.

9. A laminated busbar according to any one of claims 1 to 7, wherein a layer of insulating material is provided between any adjacent two of the electrically conductive members.

10. The laminated busbar of claim 9, wherein the layer of insulating material comprises an insulating coating and an insulating glue layer laminated to an outer surface of the electrically conductive member.