WO2022236450A1

WO2022236450A1 - Current busbar assembly and assembly method therefor, and current transmission device

Info

Publication number: WO2022236450A1
Application number: PCT/CN2021/092277
Authority: WO
Inventors: 黄婉婧; 王超
Original assignee: 舍弗勒技术股份两合公司; 黄婉婧
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2022-11-17

Abstract

Provided are a current busbar assembly and an assembly method therefor, and a current transmission device. The current busbar assembly comprises: a first support member (1) and a second support member (2), which are made of an insulating material, the first support member (1) having a first mounting recess (11), the extension direction of the second support member (2) being the same as the extension direction of the first support member (1), and at least part of the second support member (2) being stored and mounted in the first mounting recess (11); a first busbar (3) and a second busbar (4), which are both made of a conductive material, the first busbar (3) and the second busbar (4) overlapping each other with the second support member (2) therebetween, and both being stored and mounted in the first mounting recess (11); and a magnetic ring (5), which surrounds the first busbar (3) and the second busbar (4), and is stored and mounted in the first mounting recess (11). In this way, the current busbar assembly has the advantages of being simple in terms of structure, easy to assemble and low in cost.

Description

Current busbar assembly and assembly method thereof, current transmission device

technical field

The invention relates to a busbar structure for current transmission, in particular to a current busbar assembly and an assembly method thereof, and a current transmission device including the current busbar assembly.

Background technique

In an inverter system (which converts DC power to AC power), the bus bar assembly used to transmit DC power is used to transmit DC power from the power source to other electronic components. In order to improve the electromagnetic compatibility performance (EMC performance) of the inverter system and reduce the size of the busbar assembly, integrated busbar assemblies are becoming more and more popular.

Existing integrated busbar assemblies use overmolding methods to assemble the conductive busbars, insulation and magnetic rings together. However, the structure of the existing integrated bus bar assembly is relatively complicated, and there are many difficulties in the manufacturing process, and the cost is relatively high.

Contents of the invention

The present invention is made in view of the above-mentioned defects of the prior art. An object of the present invention is to provide a new type of current bus assembly and its assembly method, which makes the structure of the current bus assembly simple, easy to assemble and low in cost. Another object of the present invention is to provide a current transmission device comprising the above-mentioned current bus assembly.

In order to realize the purpose of the above invention, the present invention adopts the following technical solutions.

The present invention provides a current bus assembly as follows, which includes:

a first support and a second support, the first support and the second support are both made of insulating material, the first support is formed with a first mounting recess extending along its extending direction, The extension direction of the second support is the same as the extension direction of the first support, and at least a part of the second support is accommodated and installed in the first installation recess;

A first bus bar and a second bus bar, the first bus bar and the second bus bar are made of conductive material, a part of the first bus bar and a part of the second bus bar are separated by the second support member are overlapped in the thickness direction and are all accommodated and installed in the first installation recess; and

A magnetic ring, the magnetic ring is accommodated and installed in the first installation recess in a manner of surrounding the first bus bar and the second bus bar.

Preferably, the first busbar includes a first main body part and a first mounting part connected to both ends of the first main body part and a first extension part, and the second busbar includes a second main body part and the second installation part and the second extension part connected to the two ends of the second main body part,

The extension direction of both the first body part and the second body part is the same as the extension direction of the first support member, and the first body part and the second body part are separated by the second support The pieces overlap in the thickness direction and are stored and installed in the first installation recess,

at one end of the first support, the first mounting portion and the second mounting portion extend from the first mounting recess,

At the other end portion of the first support, the first protrusion and the second protrusion extend from the first mounting recess.

More preferably, the first mounting portion and the second mounting portion overlap in the thickness direction via the second support member.

More preferably, the first protruding portion and the second protruding portion respectively extend toward two sides in the width direction of the first support member.

More preferably, the first mounting recess includes a first recess, a second recess and a third recess communicating with each other along the extending direction, and the second recess is located at the between the first recess and the third recess,

The first main body part and the second main body part extend through the first recessed part, the second recessed part and the third recessed part, the magnetic ring is housed and installed in the first recessed part, The first protrusion and the second protrusion extend from the third recess.

More preferably, the second support member is formed with a second installation recess, and the second main body is accommodated and installed in the second installation recess.

More preferably, the magnetic ring is a split structure, and the components of the magnetic ring are stacked together in the thickness direction, so that the magnetic ring surrounds the first bus bar, the second bus bar and The three second supports.

More preferably, the first support member is formed with a first lug portion with a through hole, and the second support member is formed with a second lug portion with a through hole corresponding to the first lug portion, The first support and the second support can be fixed together by means of connectors passing through the through holes of both the first lug and the second lug.

The present invention also provides an assembly method of the current bus assembly described in any one of the above technical solutions, the assembly method includes the following steps:

installing the first component part of the magnetic ring in a corresponding part of the first mounting recess of the first support;

installing the first busbar in the first installation recess and placing it on the first component part of the magnetic ring so that the first mounting part of the first busbar extends from one end of the first support and the first protruding portion of the first bus bar extends from the other end of the first support member;

installing the second support member on the first installation recess and placing it on the first busbar;

Installing the second busbar in the first installation recess and placing it on the second support member, so that the second busbar and the first busbar are separated by the second support member in the height direction overlapping, and the second mounting portion of the second busbar extends from one end of the first support and the second extension of the second busbar extends from the other end of the first support extend out;

Installing the second component part of the magnetic ring in the corresponding part of the first mounting recess and forming a complete magnetic ring with the first component part of the magnetic ring, so that the magnetic ring surrounds the first busbar and the second busbar.

The present invention also provides the following current transmission device, which includes the current busbar assembly described in any one of the above technical solutions, one of the first busbar and the second busbar of the current busbar assembly is used as A positive bus bar, the other of the first bus bar and the second bus bar serves as a negative bus bar.

By adopting the above technical solution, the present invention provides a novel current bus assembly and its assembly method, as well as a current transmission device including the current bus assembly. The current busbar includes a first support piece, a second support piece, a first busbar, a second busbar and a magnetic ring assembled together. Both the first support and the second support are made of insulating material, the first support is formed with a first installation recess extending along its extending direction, at least a part of the second support is accommodated and installed in the first installation recess. Both the first bus bar and the second bus bar are made of conductive material, and a part of the first bus bar and a part of the second bus bar are overlapped in the thickness direction via the second support member and installed in the first mounting recess. The magnetic ring is mounted on the first mounting recess in a manner of surrounding the first bus bar and the second bus bar. The current bus assembly according to the present invention is an integrated current bus assembly, which has the advantages of simple structure, easy assembly and low cost, which also makes the current transmission device including the circuit bus assembly have corresponding advantages.

Description of drawings

FIG. 1 is a schematic perspective view showing the structure of a current bus assembly according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an exploded structure of the current bus assembly in FIG. 1 .

FIG. 3A is a schematic diagram showing a partial structure of the current bus assembly in FIG. 1 .

FIG. 3B is a schematic diagram showing another partial structure of the current bus assembly in FIG. 1 .

Explanation of reference signs

1 first support member 11 first mounting recess 111 first recess 112 second recess 113 third recess 12 first lug

2Second supporting part 21Second mounting recess 22Second lug

3 first bus bar 31 first main body part 32 first installation part 33 first extension part

4 second bus bar 41 second main body part 42 second installation part 43 second extension part

5 magnetic ring 51 first component 52 second component.

Detailed ways

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present invention, but are not intended to exhaust all possible ways of the present invention, nor are they intended to limit the scope of the present invention.

In the present invention, unless otherwise specified, "extension direction", "width direction" and "thickness direction" respectively refer to the extension direction, width direction and thickness direction of the current bus assembly (first support member).

The structure of the current bus assembly according to an embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 to 3B , the current bus assembly according to an embodiment of the present invention includes a first support 1 , a second support 2 , a first bus 3 , a second bus 4 and a magnetic ring 5 assembled together. , wherein the first bus bar 3 and the second bus bar 4 are used to transmit current, the first support member 1 and the second support member 2 are used to provide support and insulation, and the magnetic ring 5 is used to provide filtering function to improve electromagnetic compatibility.

In this embodiment, both the first support 1 and the second support 2 are made of insulating material (such as plastic).

Specifically, according to factors such as the internal structure of the device to which it is applied and the layout of electronic components, the first support member 1 is bent multiple times during the extension process. The first support 1 is formed with a first mounting recess 11 extending along its extending direction. The first mounting recess 11 includes a first recess 111 , a second recess 112 and a third recess 113 communicating with each other along an extending direction. The first concave portion 111 is located at one end in the extending direction of the first support member 1, the third concave portion 113 is located at the other end in the extending direction of the first supporting member 1, and the second concave portion 112 is located at the second end in the extending direction. Between the first concave portion 111 and the third concave portion 113 . In the width direction, the width of the first recessed portion 111 is greater than the width of the third recessed portion 113 , and the width of the third recessed portion 113 is greater than the width of the second recessed portion 112 . Since compared with the second recessed portion 112 and the third recessed portion 113, the first recessed portion 111 needs to accommodate and install the magnetic ring 5 in addition to the second support member 2, the first bus bar 3 and the second bus bar 4, so the second A concave portion 111 has the deepest depth. In addition, the heights of the side walls of the first support member 1 for forming the

recesses

111 , 112 , 113 are different, and can be flexibly set according to the size and layout of other electronic components and the insulation requirements of the busbar.

In addition, at the position of the second concave portion 112 close to the third concave portion 113 , the first support member 1 is formed with a first lug portion 12 protruding outward in the width direction, and the first lug portion 12 is formed with a thickness Direction through the through hole.

Further, the second support member 2 extends along the extension direction of the first support member 1 . A part of the second supporting member 2 is accommodated in the three

recesses

111 , 112 , 113 of the first mounting recess 11 . The part of the second support member 2 accommodated in the first installation recess 11 is formed with a second installation recess 21 extending along the extension direction, and the side wall used to form the second installation recess 21 is mainly used to provide the first bus bar 3 Insulation between the first protruding portion 33 and the second body portion 41 of the second bus bar 4 . The other part of the second support member 2 extends from one end of the first support member 1 and forms a mounting hole with the first mounting portion 32 of the first bus bar 3 and the mounting hole of the second mounting portion 42 of the second bus bar 4 Corresponding holes and other necessary insulating structures (eg raised walls).

In addition, at a position corresponding to the first lug portion 12 , the second support member 2 is formed with a second lug portion 22 , and the second lug portion 22 is formed with a through hole penetrating in the thickness direction. The first support 1 and the second support 2 can be fixed together by means of a connecting piece passing through the through holes of both the first lug portion 12 and the second lug portion 22 .

In this embodiment, both the first bus bar 3 and the second bus bar 4 are made of conductive material (such as metal), and a part of the first bus bar 3 and a part of the second bus bar 4 are separated by the second support member 2 in the thickness direction. overlapped and mounted on the first mounting recess 11 . By adopting such a structure, stray inductance can be reduced (high-frequency magnetic fields can cancel each other), thereby reducing the risk of IGBT chips being broken down.

Specifically, the first bus bar 3 includes a first main body portion 31, a first installation portion 32 and a first extension portion 33, the first installation portion 32 is connected to one end of the first main body portion 31, and the first extension portion 33 is connected to one end of the first main body portion 31. The other end of the first body part 31 is connected to each other. The second bus bar 4 includes a second main body 41, a second mounting portion 42 and a second extension 43, the second installation 42 is connected to one end of the second main body 41, the second extension 43 is connected to the second main body The other end of part 41 is connected.

The extension direction of both the first main body part 31 and the second main body part 41 is the same as the extension direction of the first support member 1, and the first main body part 31 and the second main body part 41 are sequentially separated by the second support member 2. Extending through the first recessed part 111, the second recessed part 112 and the third recessed part 113, so that the first main body part 31 and the second main body part 41 overlap in the thickness direction through the second support part 2 and are accommodated and installed in the first The recess 11 is installed. In addition, the second body part 41 is also accommodated and installed in the second installation recessed part 21 . In this way, the first main body portion 31 and the second main body portion 41 can achieve a good insulation effect.

At one end of the first support member 1, the first main body portion 31 and the second main body portion 41 extend from the first recessed portion 111 of the first mounting recess 11, and are respectively connected to the first mounting recess 11 located outside the first mounting recess 11. The installation part 32 is connected to the second installation part 42 . The first mounting portion 32 and the second mounting portion 42 overlap in the thickness direction with the second support 2 interposed therebetween. The first mounting part 32 is formed with a mounting hole. For example, a copper pipe mounting sleeve is mounted in the mounting hole of the first mounting part 32 , and the mounting sleeve extends away from the second support member 2 . The second mounting part 42 is formed with a mounting hole that is staggered from the mounting hole of the first mounting part 32, such as a copper tube mounting sleeve is installed in the mounting hole of the second mounting part 42, and the mounting sleeve extends through the second support 2 and the first mounting part 32.

At the other end of the first support 1 , the first protruding portion 33 and the second protruding portion 43 each have a bent shape, and the first protruding portion 33 and the second protruding portion 43 extend from the first mounting recess 11 The third recessed portion 113 extends out, and the first protruding portion 33 and the second protruding portion 43 extend toward both sides in the width direction of the first support member 1, so that the first protruding portion 33 and the second protruding portion 43 as far away as possible to meet the insulation requirements.

In this embodiment, the magnetic ring 5 is a permanent magnet as a whole, and the magnetic ring 5 is installed in the first recess 111 of the first installation recess 11 in a manner of surrounding the first bus bar 3 , the second bus bar 4 and the second support member 2 . The magnetic ring 5 has a cubic shape as a whole and is formed with through holes through which the first bus bar 3 , the second bus bar 4 and the second support member 2 pass. The magnetic ring 5 is formed as a split structure and comprises two

component parts

51 , 52 . The complete magnetic ring 5 is formed by overlapping the first constituent part 51 and the second constituent part 52 of the magnetic ring 5 in the thickness direction. In this way, since the magnetic ring 5 has a split structure, it helps to simplify the assembly process and the magnetic ring 5 can function as a filter to improve the electromagnetic compatibility performance of the current bus assembly. In addition, the installation of the magnetic ring 5 in the first recess 111 of the first installation recess 11 only means that the magnetic ring 5 is limited by the first recess 111 of the first installation recess 11. In fact, a part of the magnetic ring 5 is required. It may be exposed from the first mounting concave portion 11 , especially when viewed in a direction perpendicular to the thickness direction or the extending direction. Moreover, the first component 51 of the magnetic ring 5 is limited and fixed by the structure of the current bus assembly itself, and the second component 52 of the magnetic ring 5 can be limited and fixed by an additional fixing component not shown in cooperation with the current bus assembly .

By adopting the above technical solution, the current bus assembly according to an embodiment of the present invention has a simpler structure, thus saving costs.

The following describes the assembly method of the current bus assembly with the above structure according to an embodiment of the present invention, and the assembly method may include the following steps.

First, as shown in FIG. 3A , the first component part 51 of the magnetic ring 5 is installed in the first concave portion 111 of the first mounting concave portion 11 of the first supporting member 1 . Then the first busbar 3 is installed in the first installation recess 11 and placed on the first component part 51 of the magnetic ring 5, so that the first installation part 32 of the first busbar 3 is located outside the first installation recess 11, and the second A first protruding portion 33 of a bus bar 3 extends from the other end portion of the first support member 1 toward one side in the width direction.

Next, as shown in FIG. 3B , the second support member 2 is installed in the first installation recess 11 and placed on the first bus bar 3 . Subsequently, the second bus bar 4 is installed in the first installation recess 11 and placed on the second support member 2 to be stored and installed in the second installation recess 21, so that the second bus bar 4 and the first bus bar 3 are separated by a second The support members 2 overlap in the height direction, and make the second mounting portion 42 of the second bus bar 4 outside the first mounting recess 11, and the second protruding portion 43 of the second bus bar 4 extends from the other side of the first support member 1. One end extends toward the other side in the width direction.

Finally, the second component 52 of the magnetic ring 5 is installed in the first recess 111 of the first installation recess 11 and constitutes a complete magnetic ring 5 with the first component 51 of the magnetic ring 5, so that the magnetic ring 5 surrounds the first A bus 3 and a second bus 4. Finally, the assembled current bus assembly as shown in Fig. 1 is obtained.

By adopting the above assembly method, the current busbar assembly according to an embodiment of the present invention can be quickly assembled in a simple manner. Costs are thus saved.

The present invention also provides a current transmission device, the current transmission device includes a current busbar assembly, the first busbar 3 of the current busbar assembly can be used as a negative busbar, and the second busbar 4 can be used as a positive busbar.

It should be understood that the above-mentioned embodiments are only exemplary, and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the above embodiments under the teaching of the present invention without departing from the scope of the present invention. Make the following supplementary explanation.

(i) Although not explicitly described in the above specific embodiments, it should be understood that the first protruding portion 33 of the first bus bar 3 and the second protruding portion 43 of the second bus bar 4 can be used to communicate with the current transmission device Connected with other electronic components, so as to achieve the purpose of transmitting current from the outside to the inside of the current transmission device. In addition, the first supporting part 1 and the second supporting part 2 are provided with supporting structures at the mounting

parts

32, 33 of the

circuit bus bars

3, 4, on the one hand, in order not to hinder the connection between the mounting

parts

32, 33 and other components, On the other hand, it can save materials and reduce costs.

(ii) Through the description in the above specific embodiments, it can be understood that, preferably, each

busbar

3, 4 has a flat shape in its extending direction, and the angle and direction of bending of the current busbar assembly can be adjusted as required , to accommodate current delivery devices with different layouts.

(iii) Not explicitly stated in the above specific embodiments, preferably, the current transmission device can transmit direct current through the current bus assembly according to the present invention. In addition, the above-mentioned current transmission device may have other functions while transmitting current, such as the function of converting direct current into alternating current.

Claims

A current bus assembly comprising:

The first support (1) and the second support (2), the first support (1) and the second support (2) are made of insulating material, the first support (1) ) is formed with a first installation recess (11) extending along its extension direction, the extension direction of the second support (2) is the same as the extension direction of the first support (1), and the second support At least a part of the piece (2) is accommodated and installed in the first installation recess (11);

The first busbar (3) and the second busbar (4), both of the first busbar (3) and the second busbar (4) are made of conductive material, and a part of the first busbar (3) and the A part of the second bus bar (4) overlaps in the thickness direction via the second support member (2) and is all accommodated and installed in the first installation recess (11); and

A magnetic ring (5), the magnetic ring (5) is accommodated and installed in the first installation recess (11) in a manner of surrounding the first bus bar (3) and the second bus bar (4).
The current busbar assembly according to claim 1, characterized in that, the first busbar (3) comprises a first main body part (31) and a first The installation portion (32) and the first extension portion (33), the second bus bar (4) includes a second main body portion (41) and a second second main body portion (41) connected to both ends the mounting portion (42) and the second protruding portion (43),

The extension direction of both the first body part (31) and the second body part (41) is the same as the extension direction of the first support (1), and the first body part (31) and the The second main body part (41) overlaps in the thickness direction via the second support member (2) and is accommodated and installed in the first installation recessed part (11),

At one end of the first support (1), the first mounting portion (32) and the second mounting portion (42) extend from the first mounting recess (11),

At the other end of the first support (1), the first protrusion (33) and the second protrusion (43) extend from the first mounting recess (11).
The current busbar assembly according to claim 2, characterized in that, the first installation part (32) and the second installation part (42) are separated by the second support (2) in the thickness direction Overlap.
The current busbar assembly according to claim 2 or 3, characterized in that, the first protruding part (33) and the second protruding part (43) are respectively facing to the sides of the first support (1) Extended on both sides in the width direction.
The current busbar assembly according to any one of claims 2 to 4, characterized in that, the first installation recess (11) includes a first recess (111) communicating with each other along the extending direction, a second A recessed part (112) and a third recessed part (113), the second recessed part (112) is located between the first recessed part (111) and the third recessed part (113) in the extending direction between,

The first body part (31) and the second body part (41) extend through the first recessed part (111), the second recessed part (112) and the third recessed part (113) , the magnetic ring is accommodated and installed in the first recessed part (111), the first protruding part (33) and the second protruding part (43) are separated from the third recessed part (113) stretch out.
The current bus assembly according to any one of claims 2 to 5, characterized in that, the second support (2) is formed with a second installation recess (21), and the second main body (41) accommodates Installed in the second installation recess (21).
The current bus assembly according to any one of claims 1 to 6, characterized in that, the magnetic ring (5) is formed as a split structure, and the components (51, 52) of the magnetic ring (5) are in They are stacked together in the thickness direction, so that the magnetic ring (5) surrounds the first busbar (3), the second busbar (4) and the second support member (2).
The current bus assembly according to any one of claims 1 to 7, characterized in that, the first support (1) is formed with a first lug (12) having a through hole, and the second support The piece (2) is formed with a second lug portion (22) having a through hole corresponding to the first lug portion (12), by passing through the first lug portion (12) and the second The connection of the through holes of both lugs (22) enables the first support (1) and the second support (2) to be fixed together.
A method of assembling the current bus assembly according to any one of claims 1 to 8, the method of assembling comprising the steps of:

installing the first component (51) of the magnetic ring (5) in a corresponding portion of the first installation recess (11) of the first support (1);

installing the first bus bar (3) in the first installation recess (11) and placing it on the first component (51) of the magnetic ring (5), so that the first bus bar (3) The first mounting part (32) of the first support part (1) extends from one end of the first support part (1) and the first extension part (33) of the first bus bar (3) extends from the first support part ( 1) extending from the other end;

installing the second support (2) on the first installation recess (11) and placing it on the first bus bar (3);

installing the second busbar (4) in the first installation recess (11) and placing it on the second support (2), so that the second busbar (4) and the first busbar (3) The second support (2) is overlapped in the height direction, and the second installation part (42) of the second busbar (4) is separated from one end of the first support (1) and the second extension portion (43) of the second bus bar (4) extends from the other end of the first support member (1);

Installing the second component part (52) of the magnetic ring (5) in the corresponding part of the first installation recess (11) and with the first component part (51) of the magnetic ring (5) ) constitute a complete magnetic ring, so that the magnetic ring (5) surrounds the first bus bar (3) and the second bus bar (4).
A current transmission device, comprising the current busbar assembly according to any one of claims 1 to 8, one of the first busbar (3) and the second busbar (4) of the current busbar assembly is used as a positive A bus bar, the other of said first bus bar (3) and said second bus bar (4) serves as a negative bus bar.