WO2018166225A1 - 一种软母线及其制备方法 - Google Patents

一种软母线及其制备方法 Download PDF

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Publication number
WO2018166225A1
WO2018166225A1 PCT/CN2017/110512 CN2017110512W WO2018166225A1 WO 2018166225 A1 WO2018166225 A1 WO 2018166225A1 CN 2017110512 W CN2017110512 W CN 2017110512W WO 2018166225 A1 WO2018166225 A1 WO 2018166225A1
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WIPO (PCT)
Prior art keywords
wires
bus bar
soft bus
wire
bending
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PCT/CN2017/110512
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English (en)
French (fr)
Inventor
程克强
陈岩
谢秋
司占峰
马帅
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中航锂电（洛阳）有限公司
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Publication of WO2018166225A1 publication Critical patent/WO2018166225A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
    • H01B13/01254—Flat-harness manufacturing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
    • H01B13/01263—Tying, wrapping, binding, lacing, strapping or sheathing harnesses
    • H01B13/01281—Harness wrapping apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/28—End pieces consisting of a ferrule or sleeve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/32—End pieces with two or more terminations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool

Definitions

  • the invention relates to a soft busbar and a preparation method thereof, and belongs to the technical field of power supply and distribution equipment.
  • Power supply is an important part of electric vehicles.
  • Power battery is an important part of power supply system.
  • the connection of power battery and the connection of various electrical components inside the power system are mainly realized by soft bus conductor.
  • the soft bus is mainly used to derive battery current. , through the transfer between systems to form a complete loop.
  • the soft busbars currently used are mainly made of T2 copper strips with a thickness of 0.1 mm or 0.5 mm and a width of not more than 30 mm, which are formed by blanking, stacking, welding, punching, shape processing and insulation treatment.
  • the soft connection adopting the structure has the characteristics of simple process, good reliability, low impedance, and simple and quick assembly.
  • the conductive main body of the soft bus bar is formed by laminating a copper strip
  • the cross section of the conductive main body is generally a rectangular structure, and there are three disadvantages after the forming.
  • the twisted portion is a folded structure, and the folded two layers of the bus bar cannot be completely completed. Fit, resulting in a thicker thickness, more than 2 times the thickness of the soft busbar, so it requires more installation space;
  • the twist can only be bent at 90 degrees; the third is most soft busbars
  • the surface should be covered with an insulating layer. When the design is bent and twisted, the insulating coating is bent together with the soft busbar. The insulating layer will be plastically deformed at the bending point.
  • the bending In the high vibration environment of the vehicle, the bending is insulated. The layer will cause stress fatigue, which will lead to insulation failure, accidental short circuit, safety accident, and when the soft bus needs additional protection, it is necessary to re-extend the fold to the extra protective layer. This repeated operation may occur. Causes the original insulation layer to rupture.
  • a second object of the present invention is to provide a method of preparing the above soft bus.
  • a soft bus bar includes a conductive body, the conductive body being a wire bundle formed of a plurality of wires, the wire bundle including a bending zone, and a fixing zone located on both sides of the bending zone in an extending direction of the conductive body, Portions of the respective wires corresponding to the fixing regions are fixed to each other; and a portion of each of the wires corresponding to the bent portion is relatively movable.
  • the portion of the wire in the fixed area is covered with a metal strip, and the metal strip and the wire and the wires are soldered to each other. This arrangement ensures that the soft busbar fixing area has sufficient strength and can maintain a certain bending angle of the bending zone.
  • the wires are arranged in a layered structure such that the wire bundle has a rectangular cross section.
  • the wire is provided with two layers.
  • Each of the wires has a twisted structure. With this arrangement, it is possible to prevent the connection point of the vehicle-mounted environment from being loose due to vibration, and the like.
  • Each of the wires is a single structure or is stranded by a plurality of sub-wires.
  • the conductive body is formed with an insulating layer by a dip molding process.
  • the two ends of the wire bundle are covered with a metal connecting tape, and the metal connecting tape is provided with a connecting hole penetrating the metal connecting tape and the wire harness; both ends of the wire harness are covered by the metal connecting tape
  • the wires are fixed to each other.
  • the method for preparing the soft bus bar comprises the steps of: bending a wire bundle formed by a plurality of wires into a bending shape according to a desired shape, and placing the wires on the two sides of the bending region in the extending direction of the wire harness.
  • the bending portion is fixed to maintain a bent state; and a portion of each of the wires corresponding to the bending portion is relatively movable.
  • the bend is shaped and bent by the tooling die.
  • the tooling die is a pressure welding tool comprising an upper pressing head and a lower pressing head, wherein the lower pressing head is provided with a groove having a rectangular cross section matching the size of the conductive conductor, and the upper pressing head is provided with a lower pressing head
  • the grooves are matched with the protrusions, and the protrusions are only disposed in the fixing area of the soft bus bar, and the rectangular grooves of the lower pressing head can realize the bending pre-distribution of the wires.
  • the portions of the wires which are located on both sides of the bending portion in the extending direction of the wire harness are fixed to each other by: wrapping the wires on both sides of the bending region in the extending direction of the wire harness through the copper tape or the aluminum tape After the welding is fixed, the bending zone is kept bent.
  • the portions of the wires which are located on both sides of the bending zone in the extending direction of the wire bundle are fixed to each other, deburred and polished, and after being preheated, immersed in a groove containing liquid plastic to cover the wire bundle with an insulating layer.
  • the soft busbar of the invention can realize the connection of different orientations, different planes and different heights, and the soft busbar can directly bend at any angle in the twisted position, and does not need to be folded, thereby effectively saving the connection space and guiding
  • the extending direction of the electric main body is located on both sides of the bending area, and the fixing sections are physically separated from each other in the non-fixed area, which effectively ensures the rigidity and flexibility of the connection, and ensures that the bending angle of the bending area is stable and not easily deformed.
  • FIG. 1 is a schematic perspective structural view of a soft bus bar according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic view showing the shaping and bending of a tooling die according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic perspective structural view of a soft bus bar according to Embodiment 2 of the present invention.
  • the soft busbar of the present embodiment has a cross-sectional area of 70 mm 2 .
  • the soft bus bar includes a wire main body, and the conductive main body is covered with an insulating layer 3 (the insulating layer on the right half side of the soft bus bar is not shown in FIG. 1), and the insulating layer is formed by a dip molding process.
  • the above conductive body is a wire bundle having an upper and lower two-layer structure, and each layer structure of the wire bundle includes 12 wires 6 and the wires of each layer are arranged side by side. Each wire is twisted from 22 copper wires of T2 sub-wire with a diameter of 0.42 mm.
  • the wire harness is provided with a bending zone 1, and a fixing zone 2 located on both sides of the bending zone in the extending direction of the conductive body.
  • the portions of the wires that are in the bend zone are not fixed to each other, that is, can move relative to each other.
  • the portion of each wire in the fixed area is covered by a 0.2 mm thick copper strip and welded by molecular diffusion welding. After soldering, the wires and the copper strip are welded together and the connection is firm.
  • the bending zone and the fixed zone are alternately distributed to ensure that the bending zone has good rigidity and flexibility, and the bending and twisting effects are achieved, and the connection point loosening and the busbar breaking due to vibration can be prevented in the vehicle environment.
  • the portions of the wires that are in the bend zone are not welded to achieve bending at any angle.
  • the outer portion of the bending zone and the outer portion of the fixing zone are covered with an insulating layer 3.
  • the two ends of the conductive body are the connecting end 5, and the insulating layer at the connecting end 5 is scraped off with a cutter, and the connecting end is covered by a metal connecting strip, and the connecting end is provided with a circular bolt hole 4 extending through the metal connecting strip and the main body of the wire. .
  • the connection end 5 can be electroplated to ensure that the appearance dimensions meet the connection installation requirements.
  • the soft bus bar of this embodiment is provided with two kinds of bends: a first bend 7 and a second bend 8. As shown in FIG. 1, the first bend 7 is a bend toward one side in the width direction of the conductive body, and the second bend 8 is a bend toward the thickness direction of the conductive body.
  • the wire bundle formed by the plurality of wires is bent and formed by the tooling die according to the bending form shown in FIG. 1 to form a bending zone, and the portions of the wires which are located on both sides of the bending zone in the extending direction of the wire harness are made of copper strips.
  • the welding is fixed to keep the bending zone in a bent state, and the burr is polished.
  • the wire bundle is immersed in a tank containing liquid plastic to cover the wire bundle, and the preheating temperature of the conductor can be controlled.
  • the thickness of the insulation layer meets the requirements of different pressure levels and is finally cooled and solidified.
  • the tooling die shaping bending is as shown in FIG. 2, and the tooling die is a pressure welding tool comprising an upper pressing head 9 and a lower pressing head 10, and the lower pressing head is provided with a rectangular cross section matching the size of the soft bus conductor 11 a groove, the upper pressing head is provided with a protrusion matching the groove of the lower pressing head, the protrusion is only disposed in a fixed welding zone of the soft bus bar, and the rectangular groove of the lower pressing head can realize bending of the wire Pre-arranged.
  • the soft bus bar of the embodiment has only one type of bending, as shown by the bending 12 in FIG. 3, and the bending shown by the bending 12 is a twisting and bending.
  • the planes of the two sides of the bend are perpendicular to each other and the extension lines of the two side portions are perpendicular to each other.
  • the soft bus bar connecting end is provided with a through-metal connecting tape and a waist bolt hole 13 of the wire harness.
  • the sub-wires may also be a single copper wire.
  • the thickness of the copper strip can be set as desired, for example 0.1 mm or 0.5 mm.
  • the diameter of the copper wire can be set as desired, for example 0.1 mm or 0.6 mm.
  • the number of wires may be set as desired, for example 4 or 40.
  • the number of sub-wires may be set as desired, for example, 7 or 100.
  • the copper wire may also be replaced by an aluminum wire, which may also be replaced by an aluminum tape.
  • other bending angles may be set according to specific conditions, and the bending direction may also be set to be twisted by other shapes according to specific conditions.
  • the insulating sleeve may be directly on the outer casing of the conductive body as the insulating protective layer of the conductive body.
  • the number of wire layers may be one or three or more, and the cross-sectional shape of the wire bundle may also be circular.
  • the fixing portion of each of the wires in the fixing area may also be soldered. Or strapping or hooping.

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  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

一种软母线及其制备方法，该软母线包括导电主体，导电主体是由多条导线（6）形成的导线束，导线束包括折弯区（1），以及在导电主体的延伸方向上位于折弯区两侧的固定区（2），各导线与固定区相对应的部分相互固定，各导线与折弯区相对应的部分之间能够相对运动。该软母线简单可靠、节省安装空间，且具有优异折弯和安全性能。

Description

一种软母线及其制备方法 技术领域
本发明涉及一种软母线及其制备方法，属于供配电设备技术领域。
背景技术
动力电源是电动汽车的重要组成部分，动力电池是动力电源***的重要组成部分，而动力电池的连接以及电源***内部各电器件的连接主要通过软母线导体实现，软母线主要用于导出电池电流，通过在***间传递形成完整的回路。目前使用的软母线主要采用厚度为0.1mm或0.5mm，宽度不大于30mm的T2紫铜带经过落料、叠装、焊接、冲孔，外形加工和绝缘处理制成。采用这种结构的软连接具有工艺简单，可靠性好，低阻抗，装配简单快捷等特点。但由于上述软母线的导电主体是采用铜带叠片而成，导电主体截面一般为矩形结构，加工成型后有三个弊端，一是扭曲处为翻折结构，翻折后的两层母线不能完全贴合，导致厚度变大，大于2倍的软母线厚度，因此需要更大的安装空间；二是由于折弯工艺的限制，扭曲处一般只能为90度折弯；三是大多数软母线表面都要包覆绝缘层，当设计为弯曲和扭曲时，绝缘包覆层同软母线一并折弯，在折弯处绝缘层会产生塑性变形，在车载高振动环境下，折弯处绝缘层会产生应力疲劳进而导致绝缘失效，可能出现意外短路，引发安全事故，并且当软母线需要做额外防护处理时，需要将翻折处重新伸直套额外防护层，这样的反复操作有可能会造成原有的绝缘层破裂。
发明内容
本发明的目的在于提供一种软母线，以解决现有技术中软母线所需安装空间大、折弯角度范围小的技术问题。
本发明的第二个目的在于提供一种上述软母线的制备方法。
为实现上述目的，本发明的技术方案是：
一种软母线，包括导电主体，所述导电主体是由多条导线形成的导线束，所述导线束包括折弯区，以及在导电主体的延伸方向上位于折弯区两侧的固定区， 各所述导线的与所述固定区相对应的部分相互固定；各所述导线与所述折弯区相对应的部分之间能够相对运动。
所述导线处于固定区的部分裹覆有金属带，金属带与导线之间以及各导线之间相互焊接固定。如此设置，保证软母线固定区具有足够的强度，且能够使折弯区保持一定的折弯角度。
所述导线按照层状结构排列而使所述导线束的截面为矩形。
所述导线设有两层。
各所述导线之间呈绞合结构。如此设置，能够防止车载环境由于振动造成的连接点松动等。
各所述导线为单根结构或由多根子导线绞合而成。
所述导电主体外通过浸塑工艺形成有绝缘层。
所述导线束的两端部包覆有金属连接带，所述金属连接带上设有贯通金属连接带与所述导线束的连接孔；所述导线束的两端部被金属连接带包覆的各导线之间相互固定。
所述软母线的制备方法，包括以下步骤：将由多条导线形成的导线束按照所需形状折弯形成折弯区，将各导线在导线束的延伸方向上位于折弯区两侧的部分相互固定而使折弯区保持折弯状态；各所述导线与所述折弯区相对应的部分之间能够相对运动。
所述折弯通过工装模具整形折弯。
所述工装模具为压焊工装，包含上压头和下压头，所述下压头设有与导电导体尺寸相匹配的截面为矩形的凹槽，所述上压头设有与下压头凹槽相匹配的凸起，所述凸起仅设置在软母线的固定区，下压头的矩形凹槽可实现导线的折弯预排布。
所述将各导线在导线束的延伸方向上位于折弯区两侧的部分相互固定为：将各导线在导线束的延伸方向上位于折弯区两侧的部分通过铜带或铝带裹覆后焊接固定而使折弯区保持折弯状态。
所述将各导线在导线束的延伸方向上位于折弯区两侧的部分相互固定后，去毛刺抛光，经过预热后，浸入含有液塑的槽中对导线束进行绝缘层裹覆。
本发明软母线，可实现不同方位，不同平面，不同高度的连接，软母线在扭曲处可以直接实现任意角度的折弯，且无需翻折，有效节省了连接空间，并在导 电主体的延伸方向上位于折弯区两侧设有固定区，非固定区各导线之间物理分离，有效的保证了连接的刚性和柔性，保证了折弯区折弯角度稳定不易变形。
附图说明
图1为本发明实施例1中软母线的立体结构示意图；
图2为本发明实施例1中工装模具整形折弯示意图；
图3为本发明实施例2中软母线的立体结构示意图。
具体实施方式
下面结合附图对本发明的实施方式作进一步说明。
实施例1
如图1所示，为本实施例的软母线，截面积为70mm2。本实施例软母线包括导线主体，导电主体外包覆有绝缘层3(软母线右半侧的绝缘层未在图1中示出)，绝缘层通过浸塑工艺形成。上述导电主体为具有上下两层结构的导线束，导线束的每层结构包括12根导线6且每层的导线并排布置。各导线由22根直径为0.42mm的T2子导线紫铜线绞合而成。导线束设有折弯区1，以及和在导电主体的延伸方向上位于折弯区两侧的固定区2。各导线处于折弯区的部分之间互不固定即相互之间能够相对运动。各导线处于固定区的部分通过0.2mm厚的铜带裹覆并通过分子扩散焊焊接，焊接后，导线之间及导线和铜带焊接为一体，连接牢固。折弯区与固定区交替分布，保证折弯区具有较好的刚性和柔性，达到弯曲和扭曲的效果，并能防止车载环境由于振动造成的连接点松动、母线断裂等。各导线处于折弯区的部分不焊接以实现任意角度的折弯。折弯区的外部与固定区的外部均包覆有绝缘层3。导电主体的两端部为连接端5，用刀具刮去连接端5处的绝缘层，采用金属连接带裹覆连接端，连接端上设有贯通金属连接带与导线主体的圆形螺栓孔4。连接端5可采用电镀工艺确保外观尺寸满足连接安装要求。本实施例软母线设有两种折弯：第一折弯7和第二折弯8。如图1所示，第一折弯7为朝向导电主体宽度方向一侧的折弯；第二折弯8为朝向导电主体厚度方向的折弯。
本实施例软母线的制备方法，包括以下步骤：
将由多条导线形成的导线束按图1所示的折弯形式通过工装模具整形折弯形成折弯区，将各导线在导线束的延伸方向上位于折弯区两侧的部分用铜带进行 裹覆后焊接固定而使折弯区保持折弯状态，去毛刺抛光，经过预热后，浸入含有液塑的槽中对导线束进行绝缘层裹覆，可通过调整导体的预热温度，控制绝缘层的厚度，满足不同耐压等级的要求，最后冷却固化。用刀片刮去连接端处绝缘层，在导线束两连接端用金属连接带包覆并冲切有贯通金属连接带与导线束的圆形螺栓孔。其中，工装模具整形折弯如图2所示，工装模具为压焊工装，包含上压头9和下压头10，所述下压头设有与软母线导体11尺寸相匹配的截面为矩形的凹槽，所述上压头设有与下压头凹槽相匹配的凸起，所述凸起仅设置在软母线的固定焊接区，下压头的矩形凹槽可实现导线的折弯预排布。
实施例2
本实施例与实施例1的不同之处仅在于，本实施例软母线仅设有一种折弯如如图3中折弯12所示，折弯12所示的折弯为扭曲折弯，折弯后折弯处两侧部分所在平面互相垂直并且两侧部分的延伸线相互垂直。本实施例软母线连接端上设有的贯通金属连接带和导线束的腰形螺栓孔13。
在本发明的其它实施例中，子导线也可以为单根铜线。
在本发明其它实施例中，可根据需要设定铜带厚度，例如可以为0.1mm或0.5mm。
在本发明其它实施例中，可根据需要设定铜线直径，例如可以为0.1mm或0.6mm。
在本发明其它实施例中，可根据需要设定导线根数，例如可以为4或40根。
在本发明其它实施例中，可根据需要设定子导线根数，例如可以为7或100根。
在本发明其它实施例中，铜线也可以由铝线代替，铜带也可以由铝带代替。
在本发明其它实施例中，可根据具体情况设定其它折弯角度，折弯方向也可根据具体情况设置为其它形状的扭曲。
在本发明其它实施例中，可直接在导电主体外套上绝缘套作为导电主体的绝缘防护层。
在本发明其它实施例中，导线层数可以设为一层或三层及以上，导线束的截面形状也可以圆形。
在本发明其它实施例中，各导线处于固定区的部分的固定方式还可以为锡焊 或捆扎或抱箍。

Claims (13)

  1. 一种软母线，包括导电主体，其特征在于，所述导电主体是由多条导线形成的导线束，所述导线束包括折弯区，以及在导电主体的延伸方向上位于折弯区两侧的固定区，各所述导线的与所述固定区相对应的部分相互固定；各所述导线与所述折弯区相对应的部分之间能够相对运动。
  2. 如权利要求1所述的软母线，其特征在于，所述导线处于固定区的部分裹覆有金属带，金属带与导线之间以及各导线之间相互焊接固定。
  3. 如权利要求1或2所述的软母线，其特征在于，所述导线按照层状结构排列而使所述导线束的截面为矩形。
  4. 如权利要求3所述的软母线，其特征在于，所述导线设有两层。
  5. 如权利要求1或2所述的软母线，其特征在于，各所述导线之间呈绞合结构。
  6. 如权利要求1或2所述的软母线，其特征在于，各所述导线为单根结构或由多根子导线绞合而成。
  7. 如权利要求1或2所述的软母线，其特征在于，所述导电主体外通过浸塑工艺形成有绝缘层。
  8. 如权利要求1或2所述的软母线，其特征在于，所述导线束的两端部包覆有金属连接带，所述金属连接带上设有贯通金属连接带与所述导线束的连接孔；所述导线束的两端部被金属连接带包覆的各导线之间相互固定。
  9. 一种如权利要求1所述的软母线的制备方法，其特征在于，包括以下步骤：将由多条导线形成的导线束按照所需形状折弯形成折弯区，将各导线在导线束的延伸方向上位于折弯区两侧的部分相互固定而使折弯区保持折弯状态；各所述导线与所述折弯区相对应的部分之间能够相对运动。
  10. 如权利要求9所述的软母线的制备方法，其特征在于，所述折弯通过工装模具整形折弯。
  11. 如权利要求10所述的软母线的制备方法，其特征在于，所述工装模具为压焊工装，包含上压头和下压头，所述下压头设有与导电导体尺寸相匹配的截面为矩形的凹槽，所述上压头设有与下压头凹槽相匹配的凸起，所述凸起仅设置在软母线的固定区，下压头的矩形凹槽可实现导线的折弯预排布。
  12. 如权利要求9所述的软母线的制备方法，其特征在于，所述将各导线在导线束的延伸方向上位于折弯区两侧的部分相互固定为：将各导线在导线束的延伸方向上位于折弯区两侧的部分通过铜带或铝带裹覆后焊接固定而使折弯区保持折弯状态。
  13. 如权利要求9所述软母线的制备方法，其特征在于，所述将各导线在导线束的延伸方向上位于折弯区两侧的部分相互固定后，去毛刺抛光，经过预热后，浸入含有液塑的槽中对导线束进行绝缘层裹覆。
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