WO2018028601A1 - 汇流结构及电池 - Google Patents

汇流结构及电池 Download PDF

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Publication number
WO2018028601A1
WO2018028601A1 PCT/CN2017/096631 CN2017096631W WO2018028601A1 WO 2018028601 A1 WO2018028601 A1 WO 2018028601A1 CN 2017096631 W CN2017096631 W CN 2017096631W WO 2018028601 A1 WO2018028601 A1 WO 2018028601A1
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Prior art keywords
groove
extension plate
bus bar
plane
pin
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Ceased
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PCT/CN2017/096631
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English (en)
French (fr)
Inventor
王娟
马林
张捷
秦峰
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Publication of WO2018028601A1 publication Critical patent/WO2018028601A1/zh
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of battery structures, and in particular, to a bus structure and a battery.
  • the bus structure is used to connect with the battery cell to conduct the cell current from the inside to the outside of the cell, and generally includes a bus bar and a pin, and the two are welded together by the hole shaft.
  • the application provides a sink structure and a battery to reduce the processing difficulty of the bus structure.
  • a first aspect of the present application provides a bus bar structure including a bus bar and a pin, the bus bar is provided with a matching groove, the pin includes a body and an extension plate fixed to the body, the extension plate The bracket can be inserted into the mating slot, and the mating slot is fixedly connected to the extension plate.
  • the extension plate is fixedly connected to a side of the fitting groove.
  • the groove wall of the matching groove includes a first plane, a second plane and a third plane which are sequentially connected, the first plane is disposed opposite to the third plane, and the mating slot passes the first The plane and the third plane are fixedly connected to the extension plate.
  • the matching groove is a linear through groove, and the linear through groove penetrates opposite sides of the bus bar.
  • the pin further includes a limiting plate, the limiting plate is connected between the body and the extension plate, and the limiting plate extends along the extending direction of the matching groove and the confluence Strip positioning.
  • the opposite sides of the limiting plate form a limiting convex portion, and the two limiting convex portions are respectively positioned to be in contact with opposite sides of the matching groove.
  • the portion of the body that connects the limiting plate, the limiting plate and the extension plate are flush.
  • the extension plate extends from one end of the fitting groove to the other end of the fitting groove.
  • a surface of the extension plate facing away from the mating groove is flush with a bottom surface of the bus bar.
  • a second aspect of the present application provides a battery comprising the bus flow structure of any of the above.
  • the convergence structure provided by the present application has a matching groove on the bus bar, the extension plate of the pin directly extends into the matching groove, and the extension plate can be fixedly connected with the matching groove, because the matching precision of the extension plate and the matching groove is relatively easy Control, so the operation of machining bus bars and pins and assembling them together is relatively simple. Therefore, the processing of the confluence structure is less difficult.
  • FIG. 1 is a schematic diagram of a convergence structure provided by an embodiment of the present application.
  • Figure 2 is a front elevational view of the structure shown in Figure 1;
  • Figure 3 is a plan view of the structure shown in Figure 1;
  • FIG. 4 is a schematic diagram of a bus bar according to an embodiment of the present application.
  • Figure 5 is a front elevational view of the structure shown in Figure 4.
  • FIG. 6 is a schematic diagram of a pin provided by an embodiment of the present application.
  • Figure 7 is a plan view of the structure shown in Figure 6.
  • the embodiment of the present application provides a bus structure including a bus bar 10 and a pin 20, and the pin 20 is electrically connected to the tab of the battery cell, and then is electrically connected through the bus bar 10.
  • the core current is internally conducted to the outside of the cell.
  • the bus bar 10 is provided with a matching slot 100, and the shape of the mating slot 100 can be flexibly selected, such as a curved slot or the like.
  • the pin 20 includes a body 200 and an extension plate 201 fixed to the body 200.
  • the extension plate 201 can extend into the mating slot 100, and the mating slot 100 is fixedly coupled to the extension board 201.
  • the fitting groove 100 and the extension plate 201 may be fixed by welding or the like.
  • the extension plate 201 can be fixedly coupled to the side of the fitting groove 100 to improve the fixing strength between the extension plate 201 and the fitting groove 100.
  • the side surface of the fitting groove 100 refers to a portion of the fitting groove 100 excluding the bottom surface thereof, and the bottom surface is a surface facing the opening of the fitting groove 100.
  • a weld bead is formed between the mating groove 100 and the outer surface of the extension plate 201, and the width of the weld bead may be 0.2 mm.
  • laser welding can be used to improve the soldering quality.
  • the groove wall of the matching groove 100 may include a first plane 100a, a second plane 100b and a third plane 100c which are sequentially connected, and the first plane 100a is arranged opposite to the third plane 100c, and the groove 100 is matched.
  • the first plane 100a and the third plane 100c are fixedly connected to the extension plate 201.
  • the groove wall of the matching groove 100 is designed as a combination of a plurality of planes. Since the processing processes of the first plane 100a, the second plane 100b and the third plane 100c are relatively simple, the cooperation with the extension plate 201 is achieved. The accuracy is more easily ensured, and therefore, the mating groove 100 can reduce the processing difficulty of the bus structure to a greater extent.
  • the fitting groove 100 may be provided as a linear through groove which penetrates the opposite sides of the bus bar 10.
  • the linear through groove means that the extending line of the fitting groove 100 is a straight line, and the fitting groove 100 penetrates the bus bar 10 in the direction of its own extension line.
  • one end of the extension plate 201 can be placed at one end of the fitting groove 100, and the pin 20 is gradually pushed, so that the extension plate 201 protrudes into the fitting groove 100 along the extending line direction of the fitting groove 100.
  • the mating groove 100 can also enlarge the connection area of the extension plate 201 and the bus bar 10, thereby increasing the flow area of the entire bus bar structure.
  • the pin 20 may further include a limiting plate 202.
  • the limiting plate 202 is connected between the body 200 and the extension plate 201, and the limiting plate 202 is along the matching groove 100. The extending direction is aligned with the bus bar. After the setting, the operator only needs to push the pin 20. When the limiting plate 202 is positioned and blocked with the bus bar 10, the pushing of the pin 20 is stopped, and then the extension plate 201 and the bus bar 10 are fixed together.
  • the position of the blocking plate 202 and the bus bar 10 can be only on one side of the limiting plate 202.
  • the limiting plate 202 can be The limiting protrusions are disposed on opposite sides, and the two limiting protrusions are respectively positioned and blocked on opposite sides of the matching groove 100. Since the distribution positions of the two limiting protrusions are opposite sides of the matching groove 100, the force between the limiting protrusion and the bus bar 10 is relatively balanced during the limiting process, thereby achieving the foregoing purpose.
  • the relative positional relationship between the body 200, the extension plate 201 and the limiting plate 202 can be flexibly set.
  • the top surface and the bottom surface of the top portion may both be flat, and the limiting plate 202 and the extending plate 201 may be flat, such that the foregoing
  • the top surface of the top portion, the top surface of the limiting plate 202 and the top surface of the extending plate 201 are located in the same plane, and the bottom surface of the top portion, the bottom surface of the limiting plate 202 and the bottom surface of the extending plate 201 are located in the same plane, thereby simplifying
  • the structure of pin 20 simplifies the processing of pin 20.
  • the lead 20 can be processed in an integrated manner to increase the structural strength of the lead 20 and further simplify the processing of the lead 20.
  • the flow area of the bus flow structure can be increased.
  • the extension plate 201 may be extended from one end of the mating groove 100 to the other end of the mating groove 100, thereby maximizing the space between the extension plate 201 and the mating groove 100.
  • the area is matched to increase the flow area of the bus structure.
  • the end of the extension plate 201 is flush with the end of the mating groove 100, thereby achieving the largest overcurrent area in the extending direction of the mating groove 100.
  • the state of the extension plate 201 relative to the fitting groove 100 also changes. For example, when the thickness of the extension plate 201 is small, the extension plate 201 is indented relative to the engagement groove 100, at which time the flow-through structure has a small flow area; when the thickness of the extension plate 201 is large, the extension plate 201 is opposite to the engagement groove.
  • the outer protrusion of 100, at this time, the protruding portion on the extension plate 201 may cause a waste of material in the extension plate 201.
  • the surface of the extension plate 201 facing away from the mating groove 100 may be flush with the bottom surface of the bus bar 10, and the bottom surface of the bus bar 10 The surface of the mating slot 100 is opened.
  • the embodiment of the present application further provides a battery, which includes the bus structure described in any of the above technical solutions.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种汇流结构及电池，该汇流结构包括汇流条（10）和引脚（20），所述汇流条（10）上开设配合槽（100），所述引脚（20）包括本体（200）以及与所述本体（200）固定的延伸板（201），所述延伸板（201）能够伸入所述配合槽（100）内，且所述配合槽（100）与所述延伸板（201）固定连接。由于延伸板（201）与配合槽（100）的配合精度比较容易控制，因此加工汇流条（10）和引脚（20）以及将两者装配到一起时的操作比较简单。所以，该汇流结构的加工难度较低。

Description

汇流结构及电池 技术领域
本申请涉及电池结构技术领域，尤其涉及一种汇流结构及电池。
背景技术
随着能源需求的不断增加，电池在各种设备上的使用越来越广泛，因此电池的结构也得到了越来越多的关注。汇流结构用于与电芯连接，实现将电芯电流由内部导通至电芯外部，其一般包括汇流条和引脚，两者通过孔轴配合的方式焊接在一起。
然而，由于上述汇流结构中的孔轴配合部分的加工难度比较大，而汇流条与引脚之间的焊接操作对孔轴配合部分的配合精度要求又比较高，因此在加工汇流结构时，就需要从加工工艺等方面作出更多的考虑和努力，以此保证孔轴配合部分的配合精度。所以，传统技术中的汇流结构的加工难度较大。
发明内容
本申请提供了一种汇流结构及电池，以降低汇流结构的加工难度。
本申请的第一方面提供了一种汇流结构，其包括汇流条和引脚，所述汇流条上开设配合槽，所述引脚包括本体以及与所述本体固定的延伸板，所述延伸板能够伸入所述配合槽内，且所述配合槽与所述延伸板固定连接。
优选地，所述延伸板固定连接于所述配合槽的侧面。
优选地，所述配合槽的槽壁包括依次连接的第一平面、第二平面和第三平面，所述第一平面与所述第三平面相对布置，且所述配合槽通过所述第一平面、所述第三平面与所述延伸板固定连接。
优选地，所述配合槽为直线型贯通槽，所述直线型贯通槽贯通所述汇流条的相对两侧。
优选地，所述引脚还包括限位板，所述限位板连接于所述本体与所述延伸板之间，且所述限位板沿着所述配合槽的延伸方向与所述汇流条定位挡接。
优选地，所述限位板的相对两侧均形成限位凸部，两个所述限位凸部分别定位挡接于所述配合槽的相对两侧。
优选地，所述本体上连接所述限位板的部分、所述限位板和所述延伸板相平齐。
优选地，所述延伸板自所述配合槽的一端延伸至所述配合槽的另一端处。
优选地，所述延伸板上背离所述配合槽的表面与所述汇流条的底面相平齐。
本申请的第二方面提供了一种电池，其包括上述任一项所述的汇流结构。
本申请提供的技术方案可以达到以下有益效果：
本申请所提供的汇流结构在汇流条上开设配合槽，引脚的延伸板直接伸入该配合槽内，并且延伸板可以与该配合槽固定连接，由于延伸板与配合槽的配合精度比较容易控制，因此加工汇流条和引脚以及将两者装配到一起时的操作比较简单。所以，该汇流结构的加工难度较低。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为本申请实施例所提供的汇流结构的示意图；
图2为图1所示结构的主视图；
图3为图1所示结构的俯视图；
图4为本申请实施例所提供的汇流条的示意图；
图5为图4所示结构的主视图；
图6为本申请实施例所提供的引脚的示意图；
图7为图6所示结构的俯视图。
附图标记：
10-汇流条；
100-配合槽；
100a-第一平面；
100b-第二平面；
100c-第三平面；
20-引脚；
200-本体；
201-延伸板；
202-限位板。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。
如图1-7所示，本申请实施例提供了一种汇流结构，其包括汇流条10和引脚20，引脚20用于与电芯的极耳电连接，再通过汇流条10将电芯电流由内部导通至电芯外部。
汇流条10上开设配合槽100，该配合槽100的形状可以灵活选择，例如弧形槽等等。引脚20包括本体200以及与本体200固定的延伸板201，该延伸板201能够伸入前述配合槽100内，且该配合槽100与延伸板201固定连接。具体地，配合槽100与延伸板201可以采用焊接等方式固定。优选地，延伸板201可以固定连接于配合槽100的侧面，以提高延伸板201与配合槽100之间的固定强度。
上述配合槽100的侧面指的是，配合槽100上除去其底面以外的部分，该底面则是与配合槽100的开口处相对的面。当采用焊接方式时，焊接完成后，将在配合槽100与延伸板201的外表面之间形成焊缝，该焊缝的宽度可以是0.2mm。对于汇流条10与引脚20之间的焊接，可以采用激光焊接的方式，以提高焊接质量。
采用上述汇流结构后，由于延伸板201与配合槽100的配合精度更容易控制，因此加工汇流条10和引脚20以及将两者装配到一起时的操作比 较简单。所以，该汇流结构的加工难度较低。
一种实施例中，上述配合槽100的槽壁可包括依次连接的第一平面100a、第二平面100b和第三平面100c，该第一平面100a与第三平面100c相对布置，且配合槽100通过第一平面100a、第三平面100c与延伸板201固定连接。该实施例将配合槽100的槽壁设计为多个平面相组合的结构，由于第一平面100a、第二平面100b和第三平面100c的加工工艺比较简单，其与延伸板201之间的配合精度更容易得到保证，因此，此种配合槽100可以更大程度地降低汇流结构的加工难度。
为了简化配合槽100的结构，可将配合槽100设置为直线型贯通槽，该直线型贯通槽贯通汇流条10的相对两侧。此处的直线型贯通槽指的是，配合槽100的延伸线为直线，该配合槽100沿着自身延伸线的方向贯通汇流条10。此时，可以将延伸板201的一端放入配合槽100的一端，并逐渐推动引脚20，使得延伸板201沿着配合槽100的延伸线方向伸入配合槽100内。另外，此种配合槽100还可以扩大延伸板201与汇流条10的连接面积，以此增加整个汇流结构的过流面积。
当配合槽100设置为直线型贯通槽时，在实施汇流条10和引脚20的装配操作时，可以通过目测的方式确保延伸板201相对于配合槽100的位置，但是此种方式将导致操作人员需要花费较多的时间以确保延伸板201与配合槽100之间的相对位置。为了缩短汇流条10与引脚20的装配时间，引脚20还可包括限位板202，该限位板202连接于本体200与延伸板201之间，且限位板202沿着配合槽100的延伸方向与汇流条定位挡接。如此设置后，操作人员只需要推动引脚20，当限位板202与汇流条10定位挡接时，则停止推动引脚20，然后将延伸板201与汇流条10固定到一起即可。
可以理解地，上述限位板202与汇流条10的挡接位置可仅处于限位板202的单侧，但是，鉴于单侧限位的可靠性相对较低，因此可在限位板202的相对两侧均设置限位凸部，两个限位凸部分别定位挡接于配合槽100的相对两侧。由于两个限位凸部的分布位置为配合槽100的相对两侧，因此在限位过程中，限位凸部与汇流条10之间的作用力比较均衡，以此达到前述目的。
前述本体200、延伸板201和限位板202之间的相对位置关系可以灵活设置，为了简化引脚20的加工工艺，本体200上连接限位板202的部分、限位板202和延伸板201相平齐。参照图6和7，本体200上连接限位板202的部分可以是本体200的顶部，该顶部的顶面和底面均可以为平面，而限位板202和延伸板201可采用平板，使得前述顶部的顶面、限位板202的顶面和延伸板201的顶面位于同一平面内，前述顶部的底面、限位板202的底面和延伸板201的底面位于同一平面内，以此通过简化引脚20的结构来简化引脚20的加工工艺。当然，引脚20可采用一体成型的方式加工，以提高引脚20的结构强度，并进一步简化引脚20的加工工艺。
前文提到，将配合槽100设置为直线型贯通槽时，可以增大汇流结构的过流面积。基于增大汇流结构的过流面积这一目的，还可以使延伸板201自配合槽100的一端延伸至配合槽100的另一端处，以此尽量增大延伸板201与配合槽100之间的配合面积，进而增大汇流结构的过流面积。如图1所示，一种较优的实施例中，延伸板201的末端与配合槽100的末端相平齐，以此在配合槽100的延伸方向上取得最大的过流面积。
当延伸板201位于配合槽100内以后，延伸板201的厚度选择不同的值时，延伸板201相对于配合槽100的状态也会发生变化。例如，当延伸板201的厚度较小时，延伸板201相对于配合槽100内陷，此时汇流结构的过流面积较小；当延伸板201的厚度较大时，延伸板201相对于配合槽100外凸，此时延伸板201上的凸出部分会导致延伸板201存在材料浪费的情况。因此，为了在获得较大的过流面积的同时，减少延伸板201的材料用量，可使得延伸板201上背离配合槽100的表面与汇流条10的底面相平齐，汇流条10的底面指的是开设配合槽100的表面。
本申请实施例还提供一种电池，该电池包括上述任一技术方案所描述的汇流结构。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种汇流结构，其特征在于，包括汇流条和引脚，所述汇流条上开设配合槽，所述引脚包括本体以及与所述本体固定的延伸板，所述延伸板能够伸入所述配合槽内，且所述配合槽与所述延伸板固定连接。
  2. 根据权利要求1所述的汇流结构，其特征在于，所述延伸板固定连接于所述配合槽的侧面。
  3. 根据权利要求2所述的汇流结构，其特征在于，所述配合槽的槽壁包括依次连接的第一平面、第二平面和第三平面，所述第一平面与所述第三平面相对布置，且所述配合槽通过所述第一平面、所述第三平面与所述延伸板固定连接。
  4. 根据权利要求1所述的汇流结构，其特征在于，所述配合槽为直线型贯通槽，所述直线型贯通槽贯通所述汇流条的相对两侧。
  5. 根据权利要求4所述的汇流结构，其特征在于，所述引脚还包括限位板，所述限位板连接于所述本体与所述延伸板之间，且所述限位板沿着所述配合槽的延伸方向与所述汇流条定位挡接。
  6. 根据权利要求5所述的汇流结构，其特征在于，所述限位板的相对两侧均形成限位凸部，两个所述限位凸部分别定位挡接于所述配合槽的相对两侧。
  7. 根据权利要求5所述的汇流结构，其特征在于，所述本体上连接所述限位板的部分、所述限位板和所述延伸板相平齐。
  8. 根据权利要求1-7中任一项所述的汇流结构，其特征在于，所述延伸板自所述配合槽的一端延伸至所述配合槽的另一端处。
  9. 根据权利要求1-7中任一项所述的汇流结构，其特征在于，所述延伸板上背离所述配合槽的表面与所述汇流条的底面相平齐。
  10. 一种电池，其特征在于，包括权利要求1-9中任一项所述的汇流结构。
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