WO2022213365A1 - 分段式电流母线及电流传输装置 - Google Patents

分段式电流母线及电流传输装置 Download PDF

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Publication number
WO2022213365A1
WO2022213365A1 PCT/CN2021/086196 CN2021086196W WO2022213365A1 WO 2022213365 A1 WO2022213365 A1 WO 2022213365A1 CN 2021086196 W CN2021086196 W CN 2021086196W WO 2022213365 A1 WO2022213365 A1 WO 2022213365A1
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WIPO (PCT)
Prior art keywords
current
busbar
flexible
bus
flexible joint
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PCT/CN2021/086196
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English (en)
French (fr)
Inventor
王超
王莹
Original Assignee
舍弗勒技术股份两合公司
王超
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 舍弗勒技术股份两合公司, 王超 filed Critical 舍弗勒技术股份两合公司
Priority to CN202180093070.4A priority Critical patent/CN116848743A/zh
Priority to PCT/CN2021/086196 priority patent/WO2022213365A1/zh
Publication of WO2022213365A1 publication Critical patent/WO2022213365A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

Definitions

  • the present invention relates to the structure of a current transmission medium, in particular to a segmented current bus and a current transmission device including the segmented current bus.
  • AC busbars are used to make the connection between insulated gate bipolar transistor chips (IGBTs) and AC connectors or motor busbars.
  • IGBTs insulated gate bipolar transistor chips
  • the AC connector or the motor bus there may be high stress at the connection between the AC bus and other components.
  • the connection between the AC busbar and other components is unreliable.
  • Such unreliable connection will result in increased surface contact resistance between the AC bus and the other components mentioned above and reduced current transfer efficiency, and even the connection between the AC bus and the other components is at risk of disconnection after a period of use.
  • 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 novel segmented current busbar, which can reduce the stress generated at the connection parts of the current busbar after the two ends of the current busbar are fixedly connected to other components, resulting in increased contact resistance and reduced current transmission efficiency risk, further reducing the risk of disconnection between the current bus and other components.
  • Another object of the present invention is to provide a current transmission device including the above segmented current bus.
  • the present invention provides a segmented current busbar, which includes a plurality of busbar segments connected to each other, each of the busbar segments includes a main body portion and a flexible joint portion located at an end of the main body portion, adjacent The flexible joints of the busbar segments are joined together to enable current transmission throughout the current busbar, wherein the cross-sectional area of the flexible joints is smaller than the main body of the busbar segment to which the flexible joints belong the cross-sectional area of .
  • a flexible joint of at least one of the starting busbar segment and the terminating busbar segment is used for engagement with an external component.
  • each of the bus bar segments has a flat shape in the extending direction thereof, and each of the bus bar segments is bent at a right angle at most once in the thickness direction.
  • the width of the flexible joint portion is smaller than the width of the main body portion and/or the thickness of the flexible joint portion is smaller than the thickness of the main body portion, so that the flexibility of the flexible joint portion is greater than that of the main body portion. Describe the flexibility of the main body.
  • the flexible engaging portion is integrally formed in a flat comb shape extending from the body portion toward a direction away from the body portion.
  • the flexible joint portion includes a plurality of joint pins arranged side by side and spaced apart from each other along the width direction of the current bus, and two of the flexible joint portions are fixed to each other by having the joint pins of each other. together and joined to each other.
  • the bonding pins are fixed together by welding their surfaces in the thickness direction.
  • the current bus bar has a flat shape in its extending direction, and the current bus bar is bent at right angles in the thickness direction and/or the width direction.
  • the present invention also provides the following current transmission device, which includes the current bus bar described in any one of the above technical solutions, and the current bus bar is used for transmitting alternating current or direct current.
  • the current transmission device further includes a chip, and the chip pins of the chip are joined together with the bonding pins of the flexible bonding portion of the busbar segment of the current busbar.
  • the present invention provides a novel segmented current busbar and a current transmission device including the segmented current busbar.
  • the current busbar has a segmented structure and includes a plurality of busbar segments connected to each other, each The busbar segment includes a main body portion and a flexible joint portion.
  • the cross-sectional area of the flexible joint portion is smaller than the cross-sectional area of the main body portion of the busbar segment to which the flexible joint portion belongs.
  • the flexible joint portions of adjacent busbar segments are joined together. together, enabling the entire current bus to conduct current.
  • the cross-sectional area of the flexible joints is smaller than the cross-sectional area of the main body of the busbar segment to which the flexible joints belong. , thus improving the flexural deformation ability at the joint between adjacent busbar segments. Therefore, even if the two ends of the current bus bar are fixedly connected to other components, a large stress is generated at their connection parts, the stress can be reduced by the deformation of the current bus bar, so as to ensure the connection between the current bus bar and other components. This reduces the risk of increased contact resistance between the current bus and other components and reduced current transfer efficiency, further reducing the risk of disconnection between the current bus and other components.
  • Fig. 1a is a schematic perspective view showing the structure of a segmented current busbar according to an embodiment of the present invention
  • Fig. 1b is a schematic perspective view showing the structure of a second busbar segment of the current busbar in Fig. 1a
  • Fig. 1c is a schematic perspective view showing the structure of a modification of the first busbar segment of the current busbar in FIG. 1a.
  • FIG. 2 is a schematic diagram showing a part of the structure of a current transfer device including a chip and the current bus bar of FIG. 1a.
  • the segmented current bus bar B is made of conductive material, preferably metal. As shown in Fig. 1a and Fig. 1b, the segmented current busbar B includes a two-segment structure fixed together, that is, includes two busbar segments (a first busbar segment 1 and a second busbar segment 2) connected to each other, two The flexible joints of the busbar segments 1 , 2 are fixedly joined to each other so that current can be transmitted throughout the current busbar B.
  • FIG. 1a and Fig. 1b the segmented current busbar B includes a two-segment structure fixed together, that is, includes two busbar segments (a first busbar segment 1 and a second busbar segment 2) connected to each other, two The flexible joints of the busbar segments 1 , 2 are fixedly joined to each other so that current can be transmitted throughout the current busbar B.
  • the first busbar segment 1 is formed in a flat shape as a whole in the extending direction thereof, and includes a first main body portion 11 and a first flexible joint portion 12a and a second flexible joint portion 12b formed integrally with each other .
  • the first flexible joint portion 12a and the second flexible joint portion 12b are respectively fixed to both ends of the first main body portion 11 in the extending direction, and the first flexible joint portion 12a is used for connecting with other components (eg, insulated gate bipolar type).
  • the transistor chip is bonded, and the second flexible bonding portion 12b is bonded to the third flexible bonding portion 22 of the second bus bar segment 2 .
  • the first body portion 11 includes a first portion 111 and a second portion 112 that are bent at substantially right angles to each other.
  • the areas of the cross sections of the first part 111 and the second part 112 are equal and both the first part 111 and the second part 112 extend linearly.
  • the first flexible engaging portion 12a is provided at the end of the first portion 111 away from the second portion 112 and linearly extends in the same direction as the extending direction of the first portion 111.
  • the area of the cross section of the first flexible joint portion 12 a is smaller than that of the first portion 111 , so that the flexibility of the first flexible joint portion 12 a is greater than that of the first portion 111 .
  • the thickness and/or width of the first flexible joint portion 12a is smaller than that of the first portion 111, so that deformation easily occurs at the first flexible joint portion 12a.
  • the first flexible engagement portion 12a includes a first root portion 121a directly connected to the first portion 111 and three first engagement pins 122a disposed on the first root portion 121a and extending in a direction away from the first portion 111.
  • the three The first engagement pins 122 a are arranged side by side and spaced apart from each other in the width direction of the first portion 111 , whereby the first flexible engagement portion 12 a is integrally formed from the first portion 111 of the first body portion 11 toward a direction away from the first portion 111 Extended flat comb shape.
  • the second flexible engagement portion 12b is provided at the end of the second portion 112 away from the first portion 111 and linearly extends in the same direction as the extending direction of the second portion 112 .
  • the area of the cross section of the second flexible joint portion 12b is smaller than the area of the cross section of the second portion 112 , so that the flexibility of the second flexible joint portion 12b is greater than that of the second portion 112 .
  • the width of the second flexible engagement portion 12b is smaller than the width of the second portion 112 (a gap between the plurality of second engagement pins 121b described later is considered).
  • the second flexible engagement portion 12b includes four second engagement pins 121b directly connected to the second portion 112 and extending in a direction away from the second portion 112, and the four second engagement pins 121b are in the second portion 112 are arranged side by side and spaced apart from each other in the width direction.
  • the second joint pin 121b is directly and fixedly connected with the second portion 112 of the first main body portion 11, and thus the similarity to the first root portion 121a is omitted compared with the first flexible joint portion 12a root structure.
  • the second bus bar segment 2 is formed in a flat shape as a whole in the extending direction thereof, and includes a second main body portion 21 and a third flexible joint portion 22 that are integrally formed with each other.
  • the third flexible joint portion 22 is fixed to one end of the second main body portion 21 in the extending direction and is correspondingly engaged with the second flexible joint portion 12 b of the first bus bar segment 1 .
  • the second body portion 21 includes a third portion 211 and a fourth portion 212 that are slightly bent relative to each other (the bending angle between the two portions 211, 212 is much greater than 90 degrees).
  • the areas of the cross sections of the third portion 211 and the fourth portion 212 are equal and both the third portion 211 and the fourth portion 212 extend linearly.
  • the fourth portion 212 is formed with a through hole 212h penetrating in the thickness direction for connection with other components such as an AC connector or a motor bus bar.
  • the third flexible joint portion 22 is disposed at the end of the third portion 211 away from the fourth portion 212 .
  • the area of the cross section of the third flexible joint part 22 is smaller than that of the third part 211 , so that the flexibility of the third flexible joint part 22 is greater than that of the third part 211 .
  • the thickness and/or width of the third flexible joint portion 22 (taking into account the gaps between the plurality of third joint pins 222 described later) is smaller than the thickness and/or width of the third portion 211, so that in the first The three flexible joints 22 are easily deformed.
  • the third flexible engaging portion 22 includes a third root portion 221 directly connected to the third portion 211 and four third engaging pins 222 disposed on the third root portion 221 and extending in a direction away from the third portion 211,
  • the four third engagement pins 222 are arranged side by side and spaced apart from each other in the width direction of the third portion 211 , whereby the third flexible engagement portion 22 is integrally formed to extend from the third portion 211 toward a direction away from the third portion 211 comb shape.
  • the third root portion 221 itself is bent at a substantially right angle, so that a portion of the third root portion 221 extends in substantially the same direction as the third portion 211 , and the other portion, together with the third engagement pin 222 , is opposite to the aforementioned portion. Extend approximately vertically.
  • the first bus bar segment 1 and the second bus bar segment 2 having the above structure are fixed together with the third engagement pin 222 by the second engagement pin 121b.
  • one second engagement pin 121b corresponds to one third engagement pin 222, whereby four second engagement pins 121b and four third engagement pins 222 are respectively fixed.
  • the surface of the second bonding pin 121b in the thickness direction and the surface of the third bonding pin 222 in the thickness direction can be made to abut each other, and resistance welding or laser welding can be used to realize the second bonding
  • the bonding pin 121b and the third bonding pin 222 are fixed.
  • the interval between the adjacent second bonding pins 121b and the adjacent first bonding pins 121b The space between the three engagement pins 222 still exists to ensure the flexibility of the second flexible engagement portion 12b and the third flexible engagement portion 22 .
  • the portion of the third root portion 221 in the same extending direction as the second portion 112 may not abut against the second portion 112, thereby ensuring that Deformability of the third flexible joint portion 22 .
  • the current bus B according to one embodiment of the present invention has higher flexibility at the portion where the first bus segment 1 and the second bus segment 2 are joined to each other, and is thus easy to Deformation occurs so that in the event of stress at the connection between the current bus B and the external component, the stress is reduced by the deformation, thereby reducing the risk of unstable connection at the connection.
  • Fig. 1c shows a modification of the first busbar segment 1 of the current busbar B in Fig. 1a.
  • the first portion 111' of the first main body portion 11' of the first busbar segment 1' does not extend linearly, and the first portion 111' is bent at a substantially right angle in its width direction.
  • the first flexible joint portion 12a and the second flexible joint portion 12b can be staggered in the width direction of the first busbar segment 1', so as to realize an alternative structural solution to adapt to current transmission devices with different structural layouts.
  • the current transmission device includes the current bus B shown in FIG. 1 a and a chip connected to the current bus B.
  • a chip is an insulated gate bipolar transistor chip, and the current bus B is used to carry alternating current.
  • the chip pins 3 of the chip are bonded together with the bonding pins of the first flexible bonding portion 12 a of the first bus bar segment 1 of the flexible bonding portion.
  • the number of the chip pins 3 and the first bonding pins 122a are the same and in one-to-one correspondence, so that the surfaces of the chip pins 3 in the thickness direction and the surfaces of the first bonding pins 122a in the thickness direction can abut each other,
  • the chip pin 3 and the first bonding pin 122a are fixed by resistance welding or laser welding.
  • the current bus bar B having the two bus bar segments 1 and 2 has been described in the above specific embodiment, the present invention is not limited to this.
  • the current bus B according to the present invention may include two or more bus segments, and the flexible joints of adjacent bus segments are joined together so that the entire current bus B can transmit current and have the same effect as the above-described embodiment.
  • the first bonding pin 122a of the first flexible bonding portion 12a of the first bus bar segment 1 as the starting bus bar segment and the chip pin 3 of the chip as the external component have been described bonding, but the present invention is not limited to this.
  • the fourth part 212 of the second busbar section 2, which is a terminating busbar section may also be provided with flexible joints for engaging together with corresponding parts of the outer part. That is, the starting busbar segment and/or the ending busbar segment can be provided with flexible joints for engagement with external components as desired.
  • the above solution is not only applicable to the current bus B with two bus segments described in the detailed description, but also applicable to the current bus with more bus segments.
  • each busbar segment has a flat shape in its extending direction, and each busbar segment is preferably bent at a right angle at most once in the thickness direction.
  • the selected busbar segment can be bent at right angles in the width direction.
  • the current busbar formed by joining together a plurality of busbar segments has a flat shape in its extending direction, and the current busbar is bent at right angles in the thickness direction and/or the width direction to adapt to current transmission devices with different layouts.
  • right-angle bending is not limited to the bending angle between the two parts being exactly 90 degrees, but includes that the bending angle between the two parts is slightly larger than the limited range understood by those skilled in the art. or slightly less than 90 degrees.
  • the current transmission device can transmit alternating current via the current bus B according to the present invention
  • the present invention is not limited thereto.
  • Direct current can also be transmitted via this current bus B.
  • the above-mentioned current transmission device may have other functions, such as a function of converting alternating current into direct current, while transmitting current.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

一种分段式电流母线，其包括彼此相连的多个母线段（1、2），各所述母线段（1、2）包括主体部（11、11'、12）和位于所述主体部（11、11'、12）的端部的挠性接合部（12a、12b、22），相邻的所述母线段（1、2）的挠性接合部（12b、22）接合在一起，以使得电流能够在整个电流母线（B）中传输，其中，所述挠性接合部（12a、12b、22）的横截面的面积小于该挠性接合部（12a、12b、22）所属的母线段（1、2）的主体部（11、11'、12）的横截面的面积。能够通过电流母线的变形来降低电流母线与其它部件之间的连接部位处的应力，以保证连接的可靠性。还提供一种包括上述电流母线的电流传输装置。

Description

分段式电流母线及电流传输装置 技术领域
本发明涉及电流传输介质的结构，具体地涉及一种分段式电流母线及包括该分段式电流母线的电流传输装置。
背景技术
在车辆中，使用交流母线实现绝缘栅双极型晶体管芯片(IGBT)与交流连接器或电机母线之间的连接。但是，由于各部件之间存在组装误差，在交流母线的两端与上述芯片以及交流连接器或电机母线固定连接之后，在交流母线与其它部件之间的连接部位处可能存在较高的应力，从而使得交流母线与其它部件之间的连接不可靠。这种不可靠的连接将导致交流母线与上述其它部件之间的表面接触电阻变大且电流传输效率降低，甚至在使用一段时间之后交流母线与上述其它部件之间的连接存在断开的风险。
发明内容
鉴于上述现有技术的缺陷而做出本发明。本发明的一个目的在于提供一种新型的分段式电流母线，其能够降低电流母线的两端与其它部件固定连接之后在它们的连接部位处产生的应力导致接触电阻变大且电流传输效率降低的风险，进一步降低电流母线与其它部件之间的连接断开的风险。本发明的另一个目的在于提供一种包括上述分段式电流母线的电流传输装置。
为了实现上述发明目的，本发明采用如下的技术方案。
本发明提供了一种如下的分段式电流母线，其包括彼此相连的多个母线段，各所述母线段包括主体部和位于所述主体部的端部的挠性接合部，相邻的所述母线段的挠性接合部接合在一起，以使得电流能够在整个电流母线中 传输，其中，所述挠性接合部的横截面的面积小于该挠性接合部所属的母线段的主体部的横截面的面积。
优选地，在所述电流母线中，起始母线段和终止母线段中的至少一者的挠性接合部用于与外部部件接合。
更优选地，各所述母线段在其延伸方向上具有扁平形状，并且各所述母线段在厚度方向上进行至多一次直角弯折。
更优选地，所述挠性接合部的宽度小于所述主体部的宽度并且/或者所述挠性接合部的厚度小于所述主体部的厚度，使得所述挠性接合部的挠性大于所述主体部的挠性。
更优选地，所述挠性接合部整体形成为从所述主体部朝向远离所述主体部的方向延伸的扁平的梳形形状。
更优选地，所述挠性接合部包括沿着所述电流母线的宽度方向并排布置且彼此间隔开的多个接合引脚，两个所述挠性接合部通过使彼此的接合引脚固定在一起而彼此接合。
更优选地，通过焊接所述接合引脚的厚度方向上的表面来使得所述接合引脚固定在一起。
更优选地，所述电流母线在其延伸方向上具有扁平形状，所述电流母线在厚度方向和/或宽度方向上进行直角弯折。
本发明还提供了一种如下的电流传输装置，其包括以上技术方案中任意一项技术方案所述的电流母线，所述电流母线用于传输交流电或直流电。
优选地，所述电流传输装置还包括芯片，所述芯片的芯片引脚与所述电流母线的母线段的所述挠性接合部的接合引脚接合在一起。
通过采用上述技术方案，本发明提供了一种新型的分段式电流母线及包括该分段式电流母线的电流传输装置，该电流母线具有分段结构并且包括彼 此相连的多个母线段，各母线段包括主体部和挠性接合部，挠性接合部的横截面的面积小于该挠性接合部所属的母线段的主体部的横截面的面积，相邻的母线段的挠性接合部接合在一起，使得整个电流母线能够传导电流。
这样，由于整个电流母线中相邻的母线段之间通过挠性接合部接合在一起，挠性接合部的横截面的面积小于该挠性接合部所属的母线段的主体部的横截面的面积，因而提高了相邻的母线段之间的接合部位处的挠性变形能力。由此，即使在电流母线的两端与其它部件固定连接之后在它们的连接部位处产生较大的应力，也能够通过电流母线的变形来降低这种应力，以保证电流母线与其它部件之间的连接的可靠性，从而降低了电流母线与其它部件之间的接触电阻变大且电流传输效率降低的风险，进一步降低了电流母线与其它部件之间的连接断开的风险。
附图说明
图1a是示出了根据本发明的一实施方式的分段式电流母线的结构的立体示意图；图1b是示出了图1a中的电流母线的第二母线段的结构的立体示意图；图1c是示出了图1a中的电流母线的第一母线段的变型例的结构的立体示意图。
图2是示出了包括芯片和图1a中的电流母线的电流传输装置的一部分结构的示意图。
附图标记说明
B电流母线
1、1’第一母线段 11、11’第一主体部 111、111’第一部分 112第二部分 12a第一挠性接合部 121a第一根部 122a第一接合引脚 12b第二挠性接合部 121b第二接合引脚
2第二母线段 21第二主体部 211第三部分 212第四部分 22 第三挠性接合部 221第三根部 222第三接合引脚
3芯片引脚。
具体实施方式
下面参照附图描述本发明的示例性实施方式。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本发明，而不用于穷举本发明的所有可行的方式，也不用于限制本发明的范围。
以下首先结合说明书附图来说明根据本发明的一实施方式的分段式电流母线的结构。
根据本发明的一实施方式的分段式电流母线B由导电材料(优选金属)制成。如图1a和图1b所示，该分段式电流母线B包括固定在一起的两段结构，即包括彼此相连的两个母线段(第一母线段1和第二母线段2)，两个母线段1、2的挠性接合部彼此固定接合在一起，以使得电流能够在整个电流母线B中传输。
在本实施方式中，第一母线段1整体在其延伸方向上形成为扁平形状，并且包括彼此形成为一体的第一主体部11以及第一挠性接合部12a和第二挠性接合部12b。第一挠性接合部12a和第二挠性接合部12b分别固定于第一主体部11的延伸方向上的两端，第一挠性接合部12a用于与其它部件(例如绝缘栅双极型晶体管芯片)接合，第二挠性接合部12b与第二母线段2的第三挠性接合部22接合。
第一主体部11包括相对彼此弯折成大致直角的第一部分111和第二部分112。第一部分111和第二部分112的横截面的面积相等并且第一部分111和第二部分112均直线状地延伸。
第一挠性接合部12a设置于第一部分111的远离第二部分112的那端并且 以与第一部分111延伸方向相同的方向直线状地延伸。第一挠性接合部12a的横截面的面积小于第一部分111的横截面的面积，使得第一挠性接合部12a的挠性大于第一部分111的挠性。特别地，第一挠性接合部12a的厚度和/或宽度小于第一部分111的厚度和/或宽度，从而在第一挠性接合部12a处容易发生变形。
进一步地，第一挠性接合部12a包括与第一部分111直接相连的第一根部121a和设置于第一根部121a且朝向远离第一部分111的方向延伸的三个第一接合引脚122a，三个第一接合引脚122a在第一部分111的宽度方向上并排布置且彼此间隔开，由此第一挠性接合部12a整体形成为从第一主体部11的第一部分111朝向远离第一部分111的方向延伸的扁平的梳形形状。
第二挠性接合部12b设置于第二部分112的远离第一部分111的那端并且以与第二部分112延伸方向相同的方向直线状地延伸。第二挠性接合部12b的横截面的面积小于第二部分112的横截面的面积，使得第二挠性接合部12b的挠性大于第二部分112的挠性。特别地，第二挠性接合部12b的宽度小于第二部分112的宽度(考虑了后述的多个第二接合引脚121b之间的间隙)。
进一步地，第二挠性接合部12b包括与第二部分112直接相连且朝向远离第二部分112的方向延伸的四个第二接合引脚121b，四个第二接合引脚121b在第二部分112的宽度方向上并排布置且彼此间隔开。在第二挠性接合部12b中，第二接合引脚121b与第一主体部11的第二部分112直接固定连接，因此与第一挠性接合部12a相比省略了与第一根部121a类似的根部结构。
在本实施方式中，第二母线段2整体在其延伸方向上形成为扁平形状，并且包括彼此形成为一体的第二主体部21以及第三挠性接合部22。第三挠性接合部22固定于第二主体部21的延伸方向上的一端且与第一母线段1的第二挠性接合部12b对应接合。
第二主体部21包括相对彼此略微弯折的第三部分211和第四部分212(两部分211、212之间的弯折角度远远大于90度)。第三部分211和第四部分212的横截面的面积相等并且第三部分211和第四部分212均直线状地延伸。第四部分212形成在厚度方向上贯通的通孔212h，用于与其它部件(例如交流连接器或电机母线)相连。
第三挠性接合部22设置于第三部分211的远离第四部分212的那端。第三挠性接合部22的横截面的面积小于第三部分211的横截面的面积，使得第三挠性接合部22的挠性大于第三部分211的挠性。特别地，第三挠性接合部22的厚度和/或宽度(考虑了后述的多个第三接合引脚222之间的间隙)小于第三部分211的厚度和/或宽度，从而在第三挠性接合部22处容易发生变形。
进一步地，第三挠性接合部22包括与第三部分211直接相连的第三根部221和设置于第三根部221且朝向远离第三部分211的方向延伸的四个第三接合引脚222，四个第三接合引脚222在第三部分211的宽度方向上并排布置且彼此间隔开，由此第三挠性接合部22整体形成为从第三部分211朝向远离第三部分211的方向延伸的梳形形状。另外，第三根部221自身形成大致直角的弯折，使得第三根部221的一部分的延伸方向与第三部分211的延伸方向大致相同，而另一部分与第三接合引脚222一起相对于上述一部分大致垂直地延伸。
具有如上结构的第一母线段1和第二母线段2通过第二接合引脚121b与第三接合引脚222固定在一起。具体地，一个第二接合引脚121b与一个第三接合引脚222对应，由此四个第二接合引脚121b与四个第三接合引脚222分别固定。在固定的过程中，可以使得第二接合引脚121b在其厚度方向上的表面和第三接合引脚222在其厚度方向上的表面彼此抵接，并采用电阻焊接或者激光焊接来实现第二接合引脚121b与第三接合引脚222的固定。需要说明的 是，无论通过焊接的方式还是其它的方式使得第二接合引脚121b与第三接合引脚222固定在一起，相邻的第二接合引脚121b之间的间隔以及相邻的第三接合引脚222之间的间隔都仍然存在，以保证第二挠性接合部12b和第三挠性接合部22的挠性。而且，在第二接合引脚121b与第三接合引脚222固定在一起的情况下，第三根部221的与第二部分112延伸方向相同的部分可以不抵接于第二部分112，从而保证第三挠性接合部22的变形能力。
这样，与整体形成为一体的电流母线B相比，根据本发明的一实施方式的电流母线B在第一母线段1和第二母线段2彼此接合的部位处的挠性较高，因而易于产生变形，从而在电流母线B与外部部件之间的连接部位产生应力的情况下通过变形减小上述应力，从而降低上述连接部位处产生不稳定连接的风险。
进一步地，图1c示出了图1a中的电流母线B的第一母线段1的变型例。在该变型例中，第一母线段1’的第一主体部11’的第一部分111’并非直线状地延伸，该第一部分111’在其宽度方向上进行了一次大致直角的弯折。这样，能够使得第一挠性接合部12a和第二挠性接合部12b在第一母线段1’的宽度方向上错开，以实现了替代的结构方案来适应不同结构布局的电流传输装置。
以下说明包括图1a中的电流母线B的电流传输装置的结构。
如图2所示，根据本发明的电流传输装置包括图1a所示的电流母线B以及与该电流母线B相连的芯片。该芯片的示例为绝缘栅双极型晶体管芯片，并且电流母线B用于传输交流电。在图2中，芯片的芯片引脚3与挠性接合部的第一母线段1的第一挠性接合部12a的接合引脚接合在一起。芯片引脚3与第一接合引脚122a的数量相同且一一对应，可以使得芯片引脚3在其厚度方向上的表面和第一接合引脚122a在其厚度方向上的表面彼此抵接，并采用电阻焊接或者激光焊接来实现芯片引脚3与第一接合引脚122a的固定。
应当理解，上述实施方式仅是示例性的，不用于限制本发明。本领域技术人员可以在本发明的教导下对上述实施方式做出各种变型和改变，而不脱离本发明的范围。另外，进行如下补充说明。
(i)虽然在以上的具体实施方式中说明了具有两个母线段1、2的电流母线B，但是本发明不限于此。根据本发明的电流母线B可以包括两个以上的母线段，相邻的母线段的挠性接合部接合在一起，使得整个电流母线B能够传输电流并且具有与上述实施方式同样的效果。
(ii)虽然在以上的具体实施方式中说明了作为起始母线段的第一母线段1的第一挠性接合部12a的第一接合引脚122a与作为外部部件的芯片的芯片引脚3接合，但是本发明不限于此。作为终止母线段的第二母线段2的第四部分212也可以设置有挠性接合部，用于与外部部件的对应部分接合在一起。也就是说，可以根据需要为起始母线段和/或终止母线段设置挠性接合部，用于与外部部件接合。上述方案不仅适用于具体实施方式中说明的具有两个母线段的电流母线B，而且适用于具有更多母线段的电流母线。
(iii)通过以上的具体实施方式中的说明，可以理解，优选地，各母线段在其延伸方向上具有扁平形状，并且各母线段在厚度方向上优选地进行至多一次直角弯折。而且，根据需要，可以使得选中的母线段在宽度方向上进行直角弯折。这样，通过多个母线段接合在一起构成的电流母线在其延伸方向上具有扁平形状，该电流母线在厚度方向和/或宽度方向上进行直角弯折，以适应具有不同布局的电流传输装置。
需要说明的是，上述“直角弯折”不限于两部分之间的弯折角度恰好为90度，而是包括两部分之间的弯折角度在本领域技术人员可以理解的有限范围内略大于或略小于90度的情况。
(iv)虽然在以上的具体实施方式中说明了电流传输装置可以经由根据 本发明的电流母线B传输交流电，但是本发明不限于此。也可以经由该电流母线B来传输直流电。而且，上述电流传输装置在传输电流的同时可以具有其它功能，例如将交流电转换成直流电的功能。

Claims (10)

  1. 一种分段式电流母线，其包括彼此相连的多个母线段(1、2)，各所述母线段(1、2)包括主体部(11、11’、12)和位于所述主体部(11、11’、12)的端部的挠性接合部(12a、12b、22)，相邻的所述母线段(1、2)的挠性接合部(12b、22)接合在一起，以使得电流能够在整个电流母线(B)中传输，其中，所述挠性接合部(12a、12b、22)的横截面的面积小于该挠性接合部(12a、12b、22)所属的母线段(1、2)的主体部(11、11’、12)的横截面的面积。
  2. 根据权利要求1所述的电流母线，其特征在于，在所述电流母线(B)中，起始母线段(1)和终止母线段中的至少一者的挠性接合部(12a)用于与外部部件接合。
  3. 根据权利要求1或2所述的电流母线，其特征在于，各所述母线段(1、2)在其延伸方向上具有扁平形状，并且各所述母线段(1、2)在厚度方向上进行至多一次直角弯折。
  4. 根据权利要求1至3中任一项所述的电流母线，其特征在于，所述挠性接合部(12a、12b、22)的宽度小于所述主体部(11、11’、12)的宽度并且/或者所述挠性接合部(12a、12b、22)的厚度小于所述主体部(11、11’、12)的厚度，使得所述挠性接合部(12a、12b、22)的挠性大于所述主体部(11、11’、12)的挠性。
  5. 根据权利要求1至4中任一项所述的电流母线，其特征在于，所述挠性接合部(12a、22)整体形成为从所述主体部(11、11’、12)朝向远离所述主体部(11、11’、12)的方向延伸的扁平的梳形形状。
  6. 根据权利要求1至5中任一项所述的电流母线，其特征在于，所述挠性接合部(12b、22)包括沿着所述电流母线的宽度方向并排布置且彼此间隔开的多个接合引脚(121b、222)，两个所述挠性接合部(12b、22)通过使 彼此的接合引脚(121b、222)固定在一起而彼此接合。
  7. 根据权利要求6所述的电流母线，其特征在于，通过焊接所述接合引脚(121b、222)的厚度方向上的表面来使得所述接合引脚(121b、222)固定在一起。
  8. 根据权利要求1至7中任一项所述的电流母线，其特征在于，所述电流母线(B)在其延伸方向上具有扁平形状，所述电流母线(B)在厚度方向和/或宽度方向上进行直角弯折。
  9. 一种电流传输装置，其包括权利要求1至9中任一项所述的电流母线(B)，所述电流母线(B)用于传输交流电或直流电。
  10. 根据权利要求9所述的电流传输装置，其特征在于，所述电流传输装置还包括芯片，所述芯片的芯片引脚(3)与所述电流母线(B)的母线段(11)的所述挠性接合部(12a)的接合引脚(122a)接合在一起。
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