JP6158635B2 - Bus bar module - Google Patents

Bus bar module Download PDF

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JP6158635B2
JP6158635B2 JP2013165414A JP2013165414A JP6158635B2 JP 6158635 B2 JP6158635 B2 JP 6158635B2 JP 2013165414 A JP2013165414 A JP 2013165414A JP 2013165414 A JP2013165414 A JP 2013165414A JP 6158635 B2 JP6158635 B2 JP 6158635B2
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electric wire
portion
bus bar
plurality
bar module
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JP2015035322A (en
Inventor
池田 智洋
智洋 池田
和明 甲斐
和明 甲斐
知愛 井上
知愛 井上
尚憲 熊谷
尚憲 熊谷
土屋 豪範
豪範 土屋
浩一 長峰
浩一 長峰
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矢崎総業株式会社
トヨタ自動車株式会社
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Description

  The present invention relates to a bus bar module, and more particularly to a technique for improving the waterproofness of electric wires accommodated in the bus bar module.

  For example, Patent Document 1 discloses a technique in which a battery assembly in which a plurality of batteries are stacked and connected in series is used as a power source for an electric vehicle or a hybrid car. As shown in FIG. 5, this type of battery assembly includes a plurality of bus bars 101 that connect positive and negative electrodes of adjacent batteries (not shown), and a plurality of voltage detection terminals that overlap each bus bar 101. 103 and a bus bar module 109 configured by housing a plurality of electric wires 105 connected to each voltage detection terminal 103 in a resin case 107, respectively.

  The case 107 accommodates each of the bus bars 101 and the accommodating chamber 111 that accommodates the voltage detecting terminal 103 that overlaps the bus bar 101, the crimping portion (not shown) of the voltage detecting terminal 103, and the electric wire 105 crimped to the crimping portion. And a wire routing path 115 for routing a plurality of wires 105 extracted from the wire receiving chamber 113.

  The storage chamber 111 is formed inside the enclosure wall 117 that rises in a cylindrical shape from the bottom plate of the case 107, and each bus bar 101 and the voltage detection terminal 103 that overlaps the bus bar 101 are fitted and held inside the enclosure wall 117. . In addition, an opening through which the positive electrode column and the negative electrode column pass is provided in the bottom plate inside the enclosure wall 117. The electric wire accommodation chamber 113 communicates with the accommodation chamber 111 and the electric wire routing path 115, and is formed between a pair of side walls 119 rising from the bottom plate of the case 107. The electric wire routing path 115 is provided along the longitudinal direction of the case 107.

  On the other hand, in this type of bus bar module 109, for example, a droplet (water droplet or the like) generated by condensation or the like may move into the electric wire accommodation chamber 113 through the electric wire 105 due to a capillary phenomenon. However, since the crimping portion of the voltage detection terminal 103 and the electric wire 105 are tightly accommodated in the narrow space, the electric wire housing chamber 113 is easy to collect droplets, and the crimping portion of the voltage detection terminal 103 and the electric wire 105 The core wire may be exposed to the liquid for a long time.

  On the other hand, Patent Document 2 discloses a voltage detection terminal shown in FIG. The voltage detection terminal 121 is formed to include a bus bar contact portion 123 that is overlapped with the bus bar 101, a wire connection portion 125 that is connected to the core wire of the electric wire 105, and a pair of connecting portions 127 that connect them. The electric wire connecting portion 125 is provided with two pairs of press contact pieces 129a and 129b standing upright, and when the electric wire 105 is press-fitted between them, the press contact pieces 127a and 127b break through the insulation coating of the electric wire 105, respectively. And is electrically connected.

  6 is accommodated in the accommodating chamber 111 of the case 107 in a state where the bus bar contact portion 123 is overlapped with the bus bar 101, for example, as shown in FIG. The electric wire 105 press-contacted to the press-contacting piece 129 is routed along the enclosure wall 117 of the storage chamber 111 and then drawn out to the electric wire routing path 115. According to this, since the space density of the connection part of the core wire of the electric wire 105 and the electric wire connection part 125 can be made small, and also the exposed area of a core wire can be reduced, the core wire of the electric wire 105 is exposed to a liquid. Can be suppressed.

JP 2013-4501 A International Publication No. 2011/043261

  However, in the case of Patent Document 2, the front end surface of the electric wire 105 connected to the voltage detection terminal 121 is connected to the inner side of the terminal edge of the voltage detection terminal 121, that is, the connecting portion 127 and the electric wire as shown in FIG. It is arrange | positioned in the vicinity where the part 125 is connected. For this reason, for example, when droplets accumulated in the gap between the side surface of the connecting portion 127 and the surrounding wall 117 of the case 107 move to the front end surface of the electric wire 105 by capillary action, the liquid contacts the front end surface of the electric wire 105, There is a possibility that the liquid may enter the gap between the core wire and the insulation coating from the front end surface of the electric wire 105 due to the capillary phenomenon.

  This invention is made | formed in view of such a problem, and makes it a subject to prevent that a liquid penetrate | invades in an electric wire from the front end surface of an electric wire.

  In order to solve the above-described problem, a bus bar module according to the present invention includes a plurality of bus bars that connect adjacent positive electrodes and negative electrodes of a plurality of batteries in which positive electrodes and negative electrodes are alternately arranged, and connect these batteries in series. A plurality of terminals that are respectively overlapped with these bus bars, a plurality of electric wires that are respectively connected to these terminals, and a resin case that accommodates the plurality of bus bars, the plurality of terminals, and the plurality of electric wires. And the said terminal is provided with the electric wire connection part in which the bus bar contact part overlapped with the said bus bar and the connection piece electrically connected with the conductor of the said electric wire were provided. The case includes an accommodation space in which the bus bars and the terminals that overlap the bus bars are accommodated, and an end portion of the electric wire that is connected to the accommodation space and protrudes from the terminal edge. And a retreating portion for retreating, wherein a facing surface of the retreating portion facing the front end surface of the electric wire is provided apart from the front end surface.

  According to this, since the end portion on the tip end side of the electric wire can be arranged at a position away from the terminal edge, the liquid generated by dew condensation or the like in the housing space is transmitted along the terminal and contacts the tip end portion of the electric wire. Can be prevented. In addition, since the facing surface of the retracting portion is arranged to be separated from the tip surface of the electric wire, it is possible to prevent the liquid generated by condensation in the retracting portion from being transmitted from the facing surface to the tip portion. Thereby, it can prevent that a liquid penetrate | invades in an electric wire along the clearance gap between a conductor and insulation coating from the front end surface of an electric wire.

  In this case, the retracting part is formed so as to accommodate the tip part of the electric wire in a non-contact manner. According to this, even if the liquid enters the retracting portion through the inner surface of the case, the liquid can be prevented from coming into contact with the tip of the electric wire, so that the liquid can be prevented from entering from the tip of the electric wire. it can. In this case, for example, the tip of the electric wire can be accommodated in the retracting portion in a non-contact manner by providing a recess or a recess in the retracting portion.

  In addition, the case is provided with a convex portion that protrudes from the bottom surface at a position away from the electric wire connecting portion and guides the distal end portion of the electric wire to the retracting portion. According to this, since the front-end | tip part of an electric wire can be floated from the bottom face of a case, it can prevent more reliably that a liquid penetrate | invades in an electric wire from the front-end | tip surface of an electric wire. Moreover, it is preferable that a convex part is formed so that the said electric wire can be clamped. According to this, since the position shift of the front-end | tip part of an electric wire can be prevented, the front-end | tip part of an electric wire can always be maintained in a non-contact state.

  Moreover, a convex part shall be extended and provided so that the said storage space and the said retracting part may be partitioned off. According to this, it is possible to prevent liquid from entering the retracting portion along the bottom surface of the case.

  The terminal is provided so as to overlap with one side of the bus bar in the battery arrangement direction, and the retracting portion is arranged on the other side of the battery arrangement direction with respect to the wire connection part. Shall be. According to this, since the case can be prevented from being elongated in the battery arrangement direction by providing the retracting portion, the bus bar module can be prevented from being enlarged.

  According to the present invention, it is possible to prevent liquid from entering the electric wire from the front end surface of the electric wire.

It is an assembly drawing which attaches the bus bar module of this invention to a battery assembly. It is a top view which expands and shows the storage chamber of the bus bar module of this invention. It is a perspective view which shows the state which connected the electric wire to the voltage detection terminal. FIG. 4 is a perspective view showing a state in which the voltage detection terminals of FIG. 3 are superposed on a bus bar. It is a perspective view of the conventional bus bar module. It is a perspective view which shows the state which connected the electric wire to the conventional voltage detection terminal.

  Hereinafter, a bus bar module to which the present invention is applied will be described with reference to the drawings. The bus bar module of the present embodiment is mounted on, for example, an electric vehicle that travels by the driving force of the electric motor, a hybrid vehicle that travels by the driving force of both the engine and the electric motor, and the power source that supplies power to the electric motor. It is applied to the device.

  As shown in FIG. 1, the battery assembly 13 to which the bus bar module 11 of the present embodiment is attached is configured by connecting a plurality of batteries 15 in series and connecting them in series. In FIG. 1, an arrow X indicates the arrangement direction of the plurality of batteries 15, that is, the longitudinal direction of the battery assembly 13. In the present embodiment, the right side in FIG. 1 is the rear side in the arrangement direction of the batteries 15, and the left side is the front side in the arrangement direction of the batteries 15. An arrow Y indicates the height direction of each battery 15 and battery assembly 13. In this embodiment, it arrange | positions so that a height direction may become parallel to a gravity direction, and let the lower side of the arrow Y of FIG. 1 be a gravity direction. An arrow Z indicates the width direction of each battery 15, that is, the width direction of the battery assembly 13.

  Each battery 15 is formed in a rectangular parallelepiped shape, and the positive electrode 17 protrudes from one surface among the surfaces (electrode surfaces) positioned on the opposite sides, and the negative electrode 19 protrudes from the other surface. Each electrode is formed in a cylindrical shape from a conductive metal and protrudes vertically from the electrode surface. Each electrode is formed with a thread groove.

  In the battery assembly 13, the positive electrodes 17 and the negative electrodes 19 of the adjacent batteries 15 are alternately arranged in a straight line. The battery assembly 13 includes, for example, a battery 15 positioned at both ends of an even number of batteries 15 connected in series, the positive electrode of one battery 15 being a total positive electrode, and the negative electrode of the other battery 15 being a total negative electrode. Become. In the present embodiment, an example in which the positive electrode 17 and the negative electrode 19 are provided on opposite surfaces of each battery 15 will be described. However, the present invention is not limited to this example. May be provided on one surface (electrode surface).

  The bus bar module 11 includes a plurality of bus bars 21, a voltage detection terminal 23 that is a plurality of terminals that are overlapped with each bus bar 21, a plurality of electric wires 25 that are respectively connected to these voltage detection terminals 23, Bus bar 21, a plurality of voltage detection terminals 23, and a case 27 for accommodating a plurality of electric wires 25, respectively.

  The case 27 is formed by molding synthetic resin or the like, and is provided with a plurality of storage chambers 29 that form storage spaces for storing the bus bars 21 and the voltage detection terminals 23 that overlap the bus bars 21. Each storage chamber 29 is formed inside the enclosure wall 31 that rises in a cylindrical shape from the bottom plate 71 of the case 27. Adjacent storage chambers 29 are connected to each other and arranged side by side in the arrangement direction of the batteries 15. The bottom plate 71 of the storage chamber 29 is provided with an electrode hole (not shown) through which the positive electrode 17 and the negative electrode 19 of the adjacent battery 15 are passed. An electric wire routing path 33 extending in the arrangement direction of the batteries 15 is provided adjacent to each accommodation chamber 29 below each accommodation chamber 29. The electric wire routing path 33 is formed by a rectangular bottom plate 35 and a pair of side plates 37 that rise substantially parallel to each other from the side edges of the bottom plate 35.

  The bus bar 21 is formed by pressing a metal plate, and connects a plurality of batteries 15 in series by connecting a positive electrode 17 and a negative electrode 19 of adjacent batteries 15. As shown in FIG. 2, the bus bar 21 has a pair of bus bar holes 39a and 39b through which the positive electrode 17 and the negative electrode 19 adjacent to the metal plate are passed. The bus bar 21 is engaged with and engaged with the claw portions 41a to 41d of the housing chamber 29, and the positive electrode 17 and the negative electrode 19 that are passed through the bus bar hole of the bottom plate 71 are respectively passed through the pair of bus bar holes 39a and 39b. The nut 43 (FIG. 1) is screwed to the negative electrode 19 and the negative electrode 19, so that the battery assembly 13 is fixed.

  The voltage detection terminal 23 is formed by pressing a metal plate, and as shown in FIG. 3, a bus bar contact portion 45 that is overlapped and connected to the bus bar 21, and an electric wire that is electrically connected to the electric wire 25. The connecting portion 49 and a pair of connecting portions 51a and 51b connecting the bus bar contact portion 45 and the wire connecting portion 49 are integrally formed. As shown in FIG. 4, the voltage detection terminal 23 is provided so as to overlap the rear side of the bus bar 21 in the arrangement direction of the batteries 15.

  The bus bar contact portion 45 is formed in a plate shape, and is formed with a terminal hole 53 through which either the positive electrode 17 or the negative electrode 19 is passed, and an opening 55 for rotation prevention. The opening 55 is for restricting the rotation of the voltage detection terminal 23 when the nut 43 is tightened by fitting a projection (not shown) protruding from the case 27 side, as shown in FIG. Thus, it can also be omitted by locking the voltage detection terminal 23 with a plurality of claw portions 41.

  The electric wire connecting portions 49 are erected from both end portions in the width direction of the bottom plate 50, protrude inward from the pair of side plates 57 that position the electric wires 25 therebetween, and the pair of side plates 57, and Two pairs of connection pieces 59a and 59b that are electrically connected to the core wire (conductor) and the both ends of the bottom plate 50 in the width direction are respectively erected, and the insulation coating of the electric wire 25 is caulked to fix the electric wire 25 1 A pair of caulking pieces 61 are integrally formed. A part of the bottom plate 50 is abutted and supported by the case 27, and the other part is positioned so as to face the opening 47 formed in the bottom plate 71 of the case 27.

  The connecting portions 51a and 51b rise substantially vertically from the opposite side surfaces (both side surfaces in the arrangement direction of the battery 15) of the bus bar contact portion 45, respectively, and the opposite side surfaces of the wire connection portion 49 (the wiring of the battery 15). Both end surfaces in the direction). A part of connection part 51a, 51b is positioned so that the opening 47 may be faced, respectively.

  As shown in FIG. 2, the case 27 is provided with an electric wire routing portion 63 for routing the electric wires 25 along the surrounding walls 31. The electric wire routing portion 63 is formed between an enclosure wall 31 on the far side (right side in FIG. 2) in the arrangement direction of the batteries 15 and an outer wall 65 that rises facing the outside of the enclosure wall 31.

  Next, the characteristic technique of this embodiment will be described. The case 27 of this embodiment is provided with a retracting portion 67 adjacent to the accommodation chamber 29. The retracting portion 67 is disposed via the enclosure wall 31, disposed above the bus bar 21 accommodated in the accommodating chamber 29, and in the arrangement direction of the battery 15 relative to the wire connecting portion 49 of the voltage detection terminal 23. It is arranged on the front side. The retracting portion 67 is partitioned by the wire connecting portion 49 and the convex portion 69 of the accommodation chamber 29.

  The convex portion 69 is raised from the bottom plate 71 of the case 27 at a position away from the wire connection portion 49 and extends in the height direction of the battery assembly 13. Both end portions extending in the height direction of the convex portion 69 are formed to be continuous with the surrounding wall 31 extending in the longitudinal direction of the battery assembly 13. That is, the retracting portion 67 is completely partitioned from the storage chamber 29 by the enclosure wall 31 and the convex portion 69. On the upper surface of the convex portion 69, a guide portion 73 that accommodates the distal end side of the electric wire 25 that protrudes from the terminal edge through the electric wire connecting portion 49 and guides the distal end portion to the retracting portion 67 is formed. Further, the facing surface of the retracting portion 67 that faces the front end surface of the electric wire 25 is provided apart from the front end surface of the electric wire 25.

  The guide portion 73 is provided with a pair of clamping portions 75 that press and clamp the electric wire 25 from above and below. The pair of sandwiching portions 75 are provided at predetermined positions so that the distal end portions 77 of the electric wires 25 are arranged in a non-contact manner at positions away from all surfaces of the case 27 including the bottom plate 71a of the retracting portion 67. Yes.

  Next, a procedure for routing the electric wire 25 to the case 27 in which the bus bar 21 and the voltage detection terminal 23 are accommodated will be described. First, the electric wire 25 is arranged directly above the electric wire connecting portion 49 of the voltage detecting terminal 23, specifically between the pair of connecting pieces 59a and between the pair of connecting pieces 59b, and the tip end side of the electric wire 25 Is disposed directly above the guide portion 71 of the convex portion 69. Then, a pressure welding tool (not shown) is lowered, and the electric wire 25 is press-fitted between the pair of connection pieces 59a and the pair of connection pieces 59b. Thereby, each connection piece 59 breaks through the insulation coating of the electric wire 25 and is connected to the core wire of the electric wire 25. The electric wires 25 accommodated between the pair of side plates 57 are in close contact with the bottom plate 50 between the side plates 57 (FIG. 3). After fixing the electric wire 25 by caulking a pair of caulking pieces 61, the proximal end side of the electric wire 25 is bent at a substantially right angle and accommodated in the electric wire arrangement portion 63, and the electric wire 25 extracted from the electric wire arrangement portion 63. Is routed to the wire routing path 33.

  On the other hand, the electric wire 25 is sandwiched between the pair of sandwiching portions 75 by pushing the distal end side between the pair of sandwiching portions 75. Thereby, the front-end | tip part 77 of the electric wire 25 is accommodated in the retracting part 67 without contact.

  As described above, in the present embodiment, the distal end portion 77 of the electric wire 25 protruding from the electric wire connecting portion 49 is retracted into the retracting portion 67, and the distal end surface of the electric wire 25 is separated from the facing surface of the retracting portion 67. Therefore, the liquid generated in the gap between the bus bar 21 and the voltage detection terminal 23 due to condensation or the gap between the bus bar 21 and the bottom plate 71 of the case 27 is removed from the voltage detection terminal 23 and the case 27. It is possible to prevent contact with the distal end portion 77 of the electric wire 25 through the bottom plate 71, and it is possible to prevent the liquid generated by condensation in the retracting portion 67 from contacting the distal end portion of the electric wire 25. Thereby, since it can prevent that a liquid penetrate | invades through the clearance gap between a core wire and insulation coating from the front end surface of the electric wire 25, the corrosion of the electric wire 25 etc. can be prevented.

  In the present embodiment, since the tip portion 77 of the electric wire 25 is arranged in a non-contact manner in the retracting portion 67, the liquid contacts the tip portion 77 of the electric wire 25 even if the wall surface of the retracting portion 67 is condensed. Can be prevented.

  Further, in the present embodiment, since the leading end side of the electric wire 25 is sandwiched by the guide portion 73 of the convex portion 69, the positional deviation of the leading end portion 77 of the electric wire 25 can be prevented, and the leading end portion 77 is always non-contacted. Can be maintained. Moreover, the work efficiency of the assembly work of the electric wire 25 can be improved. In addition, the guide part 73 may not be the structure which clamps the electric wire 25, and can also be set as the simple structure which only forms a groove | channel.

  In the present embodiment, the voltage detection terminal 23 is disposed on one side (back side) in the arrangement direction of the batteries 15 in the accommodation chamber 29, and the retracting portion 67 is connected to the wire connection portion 49 of the voltage detection terminal 23. On the other hand, since the battery 15 is arranged on the other side (front side) in the arrangement direction of the battery 15, the retracting portion 67 can be arranged above the storage chamber 29 without protruding in the arrangement direction of the battery 15. . As a result, the case 27 can be prevented from being elongated in the direction in which the batteries 15 are arranged, so that the bus bar module 11 can be prevented from being enlarged.

  As mentioned above, although embodiment of this invention has been explained in full detail with drawing, said embodiment is only an illustration of this invention and this invention is not limited only to the structure of said embodiment. . Needless to say, even if there is a design change within a range not departing from the gist of the present invention, it is included in the present invention.

  For example, in this embodiment, the front end side of the electric wire 25 is supported by the convex portion 69 so that the front end portion 77 of the electric wire 25 is floated in the retracting portion 67 and accommodated in a non-contact manner. Instead of providing the recess 67 in the retracting portion 67, the tip 77 of the electric wire 25 can be floated and held in a non-contact manner. In addition, the convex portion 69 of the present embodiment is formed to extend so as to partition the storage chamber 29 and the retracting portion 67, but the point is that it is separated from the wire connecting portion 49 and the tip portion 77 of the electric wire 25 is moved away from the retracting portion. If it is provided in a position that can be accommodated in 67, it is not limited to this configuration.

  Moreover, in this embodiment, although the electric wire 25 demonstrated the example connected to the voltage detection terminal 23 which detects the voltage between the adjacent batteries 15, this invention is applicable also when using the terminal of another objective. Can be applied. The voltage detection terminal 23 is limited to the configuration of the present embodiment as long as the voltage detection terminal 23 includes at least the bus bar contact portion 45 that overlaps the bus bar 21 and the connection piece 59 that is electrically connected to the core wire of the electric wire 25. is not.

DESCRIPTION OF SYMBOLS 11 Bus bar module 13 Battery assembly 15 Battery 17 Positive electrode 19 Negative electrode 21 Bus bar 23 Voltage detection terminal 25 Electric wire 27 Case 29 Storage chamber 31 Enclosure wall 45 Bus bar contact part 49 Electric wire connection part 59 Connection piece 67 Retraction part 69 Protrusion part 73 Guide part 75 Clamping part 77 Tip

Claims (6)

  1. A plurality of bus bars that connect adjacent positive electrodes and negative electrodes of a plurality of batteries in which positive electrodes and negative electrodes are alternately arranged and connect these batteries in series, a plurality of terminals that are respectively overlapped with these bus bars, and these terminals A plurality of electric wires connected to each other, a plurality of bus bars, a plurality of terminals, and a resin case that accommodates the plurality of electric wires, wherein the terminals are overlapped with the bus bars, In the bus bar module comprising an electric wire connection portion provided with a connection piece electrically connected to the conductor of the electric wire,
    The case includes an accommodation space in which the bus bars and the terminals that overlap the bus bars are accommodated, and a retracted end portion of the electric wire connected to the electric wire connection portion and protruding from the terminal edge. A bus bar module comprising: a retracting portion, wherein a facing surface of the retracting portion facing the tip end surface of the electric wire is provided apart from the tip end surface.
  2.   2. The bus bar module according to claim 1, wherein the retracting portion is formed so as to be capable of accommodating a tip portion of the electric wire in a non-contact manner.
  3.   The said case protrudes from the bottom face of the position away from the said electric wire connection part, and the convex part which guides the front-end | tip part of the said electric wire to the said evacuation part is provided. Bus bar module.
  4.   The bus bar module according to claim 3, wherein the convex portion is formed to be able to sandwich the electric wire.
  5.   5. The bus bar module according to claim 3, wherein the convex portion is provided to extend so as to partition the accommodation space and the retracting portion.
  6. The terminal is provided to be overlapped on either side of the battery bar in the battery arrangement direction,
    6. The bus bar module according to claim 1, wherein the retracting portion is disposed on the other side in the arrangement direction of the batteries with respect to the electric wire connecting portion.
JP2013165414A 2013-08-08 2013-08-08 Bus bar module Active JP6158635B2 (en)

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8449333B2 (en) * 2009-10-06 2013-05-28 Yazaki Corporation Battery connecting structure
WO2012090340A1 (en) * 2010-12-28 2012-07-05 Yazaki Corporation Busbar module and power supply apparatus incorporating the same
JP5673491B2 (en) * 2011-10-31 2015-02-18 株式会社オートネットワーク技術研究所 Battery wiring module
JP5875107B2 (en) * 2011-12-07 2016-03-02 矢崎総業株式会社 Battery connector

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