JP2010170884A - Bus bar module and assembling method for the same - Google Patents

Bus bar module and assembling method for the same Download PDF

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JP2010170884A
JP2010170884A JP2009013089A JP2009013089A JP2010170884A JP 2010170884 A JP2010170884 A JP 2010170884A JP 2009013089 A JP2009013089 A JP 2009013089A JP 2009013089 A JP2009013089 A JP 2009013089A JP 2010170884 A JP2010170884 A JP 2010170884A
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Japan
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bus bar
accommodating
plate
portions
housing
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JP2009013089A
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Japanese (ja)
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JP5308841B2 (en
Inventor
Yoshiaki Ichikawa
Tomohiro Ikeda
Hideki Inoue
Akihiro Ozaki
Katsunori Sato
Takao Shoji
Shinichi Yanagihara
秀樹 井上
勝則 佐藤
秋弘 小崎
喜章 市川
隆雄 庄子
真一 柳原
智洋 池田
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Toyota Motor Corp
Yazaki Corp
トヨタ自動車株式会社
矢崎総業株式会社
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Priority to JP2009013089A priority Critical patent/JP5308841B2/en
Publication of JP2010170884A publication Critical patent/JP2010170884A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bus bar module which is suitable to be mounted on a battery assembly with a large accumulated tolerance. <P>SOLUTION: The bus bar module 1 having bus bars 6 for connecting electrodes of adjacent batteries of the battery assembly, terminals 7, wires 8 connected with the terminals 7, and a plate 11 for storing these subjects comprises a plurality of first storage sections 12 storing respective bus bars 6 and respective terminals 7 and arranged in parallel along an arrow mark X, a plurality of second storage section 14 storing the wires 8 and arranged along the arrow mark X, third storage sections 21 for storing connection sections between the wires 8 and the terminals 7, a first hinge 13 for connecting the adjacent first storage sections 12, a second hinge 15 for connecting the adjacent second storage sections 14, and a plurality of pairs of fixing sections 18 arranged as a pair at a location where the second hinge 15 is positioned between the pair of fixing sections and fixing the wires 8. Each wire 8 is formed to be at a length reached from one end of the plate 11 to each third storage section 21 by extending each wire 8 to the utmost. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bus bar module constituting a power supply device used in a hybrid vehicle, an electric vehicle, and the like, and a method for assembling the bus bar module.

  For example, an electric vehicle that travels using an electric motor, a hybrid vehicle that travels using both an engine and an electric motor, and the like are equipped with a power supply device as shown in Patent Document 1 as a drive source of the electric motor. ing. This power supply device includes a battery assembly configured by alternately stacking a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end, and a bus bar module attached to the battery assembly. And is composed of. FIG. 11 is an exploded view of the conventional bus bar module disclosed in Patent Document 1. In FIG.

  The bus bar module 100 shown in FIG. 11 includes a plurality of bus bars 105, 105 ′ that connect the plurality of batteries in series by connecting the electrodes of the batteries adjacent to each other in the battery assembly, and the bus bars 105, 105. A plurality of terminals 128 that are connected to each other to detect the voltage of the battery, a plurality of electric wires 132 that are connected to each terminal 128, a ground wire (not shown), and a synthetic resin plate 116 that accommodates these terminals, Have. In FIG. 11, reference numeral 134 denotes a terminal connected to the bus bar 105 ′, and 135 denotes a power supply line connected to the terminal 134.

  The plate 116 accommodates a plurality of bus bars 105 and 105 ′ and terminals 128 and terminals 134 connected to the bus bars 105 and 105 ′, and a plurality of first bars arranged in the overlapping direction of the plurality of batteries. A plurality of electric wires 132 that are extended from the edges of each of the accommodating portions 116A, 116B, 116C and the plate-like substrate portion 125 that constitutes the outline of the first accommodating portions 116A, 116B, 116C. A plurality of housings for positioning the power supply wires 135 and the ground wires on the inner side, extending from the edges of each of the substrate portions 125, the wire housing portions 141, the plurality of lid portions 143 that block the openings of the respective wire housing portions 141 A groove 140, a plurality of covers 127 provided on each board portion 125 via hinges, and a pin for adjusting a slight positional deviation between each bus bar 105, 105 ′ and each electrode. Has a switch adjustment means 107.

  The pitch adjusting means 107 is provided at two locations between the first housing portion 116A and the first housing portion 116B and between the first housing portion 116B and the first housing portion 116C. The pitch adjusting means 107 includes a slit 108 provided between adjacent substrate portions 125 and having an opening at one end on one edge side of the substrate portion 125, and an escape hole provided at the other end portion of the slit 108. 109 and a flexible portion 110 which is a portion located on the other edge side of the escape hole 109 of the substrate portion 125. The pitch adjusting means 107 adjusts a slight positional deviation between the bus bars 105 and 105 ′ and the electrodes by changing the width of the slit 108 by the elastic deformation of the flexible portion 110.

  The bus bars 105 and 105 ′ are provided with holes 106 and 106 </ b> S through which a cylindrical electrode is passed through a metal plate. The terminal 128 is connected to a plate-like electrode connection part 131 provided with a hole through which the electrode passed through the holes 106 and 106S is passed, and the electric wire 132. It is the structure which has the electric wire connection part 129 made.

  The bus bar module 100 having the above-described configuration is attached to the battery assembly so as to overlap the surface of the battery assembly on which the electrodes are provided. At this time, if a positive tolerance dimensional deviation occurs in the battery assembly, the pitch adjusting means 107 is disposed between the first housing portion 116A and the first housing portion 116B, and between the first housing portion 116B and the first housing. A slight misalignment between each bus bar 105, 105 ′ and each electrode is adjusted by expanding the space between the portions 116C. Further, when a negative tolerance dimensional deviation occurs in the battery assembly, the pitch adjusting means 107 is provided between the first housing portion 116A and the first housing portion 116B, and between the first housing portion 116B and the first housing portion. A slight misalignment between each bus bar 105, 105 ′ and each electrode is adjusted by reducing the distance between the electrodes 116C.

JP 2000-149909 A

  However, with current battery assemblies, as the voltage increases, the number of batteries in the stacking direction increases, so the cumulative tolerance (tolerance generated by the accumulated tolerance of each battery) becomes larger than that of the conventional product. Therefore, when the above-described conventional bus bar module 100 is attached to the current battery assembly, there are the following problems.

  That is, the conventional bus bar module 100 is provided with the pitch adjusting means 107 that adjusts a slight positional deviation between each bus bar 105, 105 ′ and each electrode, but a positive cumulative tolerance occurs in the battery assembly. In preparation for the case where the plate 116 is stretched, it is necessary to provide the wire 132 connected to the terminal 128 with an extra length, that is, a slack, in advance. “Even if the plate 116 is stretched, the wire 132 is not pulled. It is conceivable that “the wire 132 connected to the terminal 128 has a surplus length, that is, a slackness in advance” as a measure for making it, but the wire 132 has a surplus length. There is a problem that the operation of accommodating the plate 116 is complicated. Further, if the electric wire 132 accommodated in the plate 116 is in an overall slack state, the electric wire 132 may flutter, bend excessively, or be caught by other parts. It is not preferable to leave it in a slack state. Further, the battery assembly may have a negative cumulative tolerance, that is, the plate 116 must be contracted. In this case, the amount of sag of the electric wire 132 is further increased. It becomes even more important to provide a means for preventing “shaking, excessive bending, or being caught by other parts”.

  Accordingly, the present invention focuses on the above-described problems, and an object thereof is to provide a bus bar module suitable for being attached to a battery assembly, and an assembly method for easily assembling the bus bar module.

  In order to achieve the above object, the invention described in claim 1 is a battery assembly formed by alternately stacking a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end. A plurality of bus bars connecting the plurality of batteries in series by connecting the electrodes of the batteries adjacent to each other in the body, a plurality of terminals connected to the bus bars and detecting the voltage of the batteries, A bus bar module comprising: a plurality of electric wires connected to a terminal; and the plurality of bus bars; a synthetic resin plate containing the plurality of terminals; and the plurality of electric wires; And the terminals connected to each bus bar, and a plurality of first accommodating portions arranged along the overlapping direction of the plurality of batteries, and a straight line parallel to the arrangement direction of the plurality of first accommodating portions Multiple items can be arranged in A plurality of second housing portions constituting a hook-shaped wire housing portion capable of housing the plurality of wires connected to each terminal, and the first housing portion and the second housing portion facing each other are connected to each other. A plurality of third accommodating portions that accommodate connection portions between the electric wires and the terminals, and a plurality that adjust misalignment between the bus bar and the electrode by changing the interval between the first accommodating portions adjacent to each other. The first pitch adjusting means, a plurality of second pitch adjusting means for changing the interval between the second accommodating portions adjacent to each other, and the wire accommodating portion spaced along the arrangement direction of the plurality of first accommodating portions. And a plurality of pairs of fixing portions arranged in pairs at positions where the second pitch adjusting means is positioned between each other, and fixing the plurality of electric wires, and the plurality of the plurality of fixing portions. The length of each wire is within the tolerance range Length reaching from the one end of the plate in a state where each bus bar is positioned at a position connectable to each electrode of the battery assembly formed in the maximum dimension to the third accommodating portion that accommodates the connection portion of each electric wire. It is a bus bar module characterized by being formed.

  According to a second aspect of the present invention, in the first aspect of the present invention, the plurality of electric wires are provided in the electric wire accommodating portion of the plate that is extended to the maximum along the arrangement direction of the plural first accommodating portions. And the connecting portion of each electric wire is housed and assembled in a predetermined third housing portion.

  According to a third aspect of the present invention, in the first aspect of the invention, the first pitch adjusting means includes a first hinge that is elastically deformable and connects the first accommodating portions adjacent to each other. And the second pitch adjusting means is composed of an elastically deformable second hinge connecting the second accommodating portions adjacent to each other, and the plurality of first hinges and the plurality of second hinges are In an undeformed state, from the bus bar located at one end of the plate in the arrangement direction of the plurality of first accommodating portions to the bus bar located at the other end of the plate in the arrangement direction of the plurality of first accommodation portions. An interval is located at the other end of the battery assembly in the overlapping direction of the plurality of batteries from the electrode positioned at one end of the battery assembly in the overlapping direction of the plurality of batteries formed to the maximum dimension within a tolerance range. Before To be greater than the distance to the electrode, it is characterized in that the plate is formed.

  According to a fourth aspect of the present invention, in the first aspect of the first to third aspects, the first pitch adjusting means is arranged every other first accommodating portion, and the second The pitch adjusting means is arranged every other second accommodating portion.

  The invention described in claim 5 is the battery adjacent to each other in a battery assembly formed by alternately stacking a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end. A plurality of busbars connecting the plurality of batteries in series by connecting the electrodes of the plurality of terminals, a plurality of terminals connected to the busbars for detecting the voltage of the battery, and a plurality of terminals connected to the terminals. An electric wire, and a plurality of bus bars, a plurality of terminals, and a synthetic resin plate containing the plurality of electric wires, and the plates connected to the bus bars and the bus bars. Connected to each terminal by accommodating a plurality of first accommodating parts arranged along the overlapping direction of the plurality of batteries, and a plurality of arranged on a straight line parallel to the arranging direction of the plurality of first accommodating parts. Can accommodate the plurality of electric wires A plurality of second housing portions constituting a shaped wire housing portion, the first housing portion and the second housing portion facing each other, and a plurality of second housing portions housing a connection portion between the wire and the terminal. 3 accommodating portions, a plurality of first pitch adjusting means for adjusting a positional deviation between the bus bar and the electrode by changing an interval between the first accommodating portions adjacent to each other, and the second accommodating portions adjacent to each other. A plurality of second pitch adjusting means for changing a distance between the second pitch adjusting means, and the second pitch adjusting means arranged at intervals along the arrangement direction of the plurality of first containing parts in the electric wire containing part. And a plurality of pairs of fixing portions for fixing the plurality of electric wires, and the length of each of the plurality of electric wires is formed to the maximum dimension within a tolerance range. A position connectable to each electrode of the battery assembly. A method of assembling a bus bar module that is formed to reach a length from the one end of the plate in a state where each bus bar is positioned to the third accommodating portion that accommodates the connection portion of each electric wire, A plate stretching step that stretches to the maximum along the direction in which the plurality of first housing portions are arranged, the wire is housed in the wire housing portion of the stretched plate, and the connection portions of each wire are A method of assembling the bus bar module, comprising sequentially housing steps in the third housing portion.

  According to the first aspect of the present invention, the plate accommodates the bus bars and the terminals connected to the bus bars, and a plurality of first lines arranged in the overlapping direction of the plurality of batteries. A plurality of housing portions and a plurality of wire-shaped housing portions that can accommodate the plurality of electric wires connected to the respective terminals by being arranged in a plurality on a straight line parallel to the arrangement direction of the plurality of first housing portions. The second housing portion, the first housing portion and the second housing portion that face each other, and a plurality of third housing portions that house a connection portion between the electric wire and the terminal, and the adjacent to each other A plurality of first pitch adjusting means for adjusting a positional deviation between the bus bar and the electrode by changing a distance between the first housing parts, and a plurality of first pitch changing means for changing the distance between the second housing parts adjacent to each other. 2 pitch adjustment means and the wire housing part in front A plurality of pairs that are arranged at intervals along the direction in which the plurality of first accommodating portions are arranged and are arranged in pairs at positions where the second pitch adjusting means is positioned between them, and fix the plurality of electric wires. And each bus bar is positioned at a position where the length of each of the plurality of electric wires can be connected to each electrode of the battery assembly formed in a maximum dimension within a tolerance range. The bus bar module is attached to the battery assembly having a positive cumulative tolerance because it is formed so as to reach from the one end of the plate in a state to the third housing portion that houses the connection portion of each electric wire. In this case, it is possible to prevent the electric wire from being pulled, and at the same time, it is possible to prevent the electric wire from flapping, being bent excessively or being caught by other parts. Therefore, it is possible to provide a bus bar module suitable for being attached to a battery assembly having a large cumulative tolerance.

  According to the invention described in claim 2, the plurality of electric wires are accommodated in the electric wire accommodating portion of the plate extended to the maximum along the arrangement direction of the plurality of first accommodating portions, and each electric wire Since the connecting portion is accommodated and assembled in the predetermined third accommodating portion, the extra length of the electric wire is ensured evenly between the fixed portions forming a pair by such an easy assembling operation. A bus bar module can be provided.

  According to the invention described in claim 3, the first pitch adjusting means is constituted by the elastically deformable first hinge connecting the first accommodating portions adjacent to each other, and the second pitch adjusting means. The means comprises a second hinge that is elastically deformable and connects the second accommodating portions adjacent to each other, and the plurality of first hinges and the plurality of second hinges are in an undeformed state, and the plate The distance from the bus bar located at one end in the arrangement direction of the plurality of first accommodating portions to the bus bar located at the other end of the plate in the arrangement direction of the plurality of first accommodating portions is a maximum within a tolerance range. More than the distance from the electrode located at one end of the battery assembly in the overlapping direction of the plurality of batteries to the electrode located at the other end of the battery assembly in the overlapping direction of the plurality of batteries. big As described above, since the plate is formed, an easy assembling operation for accommodating the wire in a state where the wire is straightly stretched in the wire accommodating portion in a state where no external force is applied, that is, a state where the plate is not stretched. A bus bar module can be provided that can be assembled.

  According to the invention described in claim 4, the first pitch adjusting means is arranged every one first accommodating portion, and the second pitch adjusting means is arranged every one second accommodating portion. Therefore, the “adjustment allowance” for adjusting the positional deviation between each bus bar and each electrode due to the accumulated tolerance of the battery assembly becomes larger than that of the conventional product. Therefore, it is possible to provide a bus bar module that is more suitable for being attached to a battery assembly having a large cumulative tolerance.

  According to the invention described in claim 5, a plate stretching process for stretching the plate to the maximum along the arrangement direction of the plurality of first housing portions, and the wire housing portions of the stretched plates include the plurality of wires. And an accommodating step of accommodating the electric wire and accommodating the connecting portion of each electric wire in the predetermined third accommodating portion, so that the extra length of the electric wire is secured between the pair of fixed portions. A bus bar module suitable for mounting on a battery assembly having a large cumulative tolerance can be easily assembled.

It is a perspective view which shows the power supply device comprised with the bus bar module which concerns on the 1st Embodiment of this invention, and the battery assembly to which this bus bar module is attached. It is the schematic of the battery which comprises the battery assembly shown by FIG. It is a top view which shows a part of bus bar module shown by FIG. 1, and is a top view which shows the said bus bar module in the state in which the 1st pitch adjustment means and the 2nd pitch adjustment means are undeformed. It is the top view which looked at the plate shown by FIG. 3 from the arrow A direction in FIG. It is sectional drawing along the BB line in FIG. FIG. 2 is a plan view showing a part of the bus bar module shown in FIG. 1, and is a plan view showing the bus bar module in a state in which the first pitch adjusting means and the second pitch adjusting means are extended to the maximum. It is a top view which shows a part of bus bar module shown by FIG. 1, and is a top view which shows the said bus bar module in the state by which the 1st pitch adjustment means and the 2nd pitch adjustment means were contracted. FIG. 2 is an explanatory view for explaining a mounting method for attaching the bus bar module shown in FIG. 1 to the battery assembly shown in FIG. 1, wherein (a) shows a state in which one end of the bus bar module is overlapped with one end of the battery assembly. (B) is a figure which shows the state by which the part of the other end side of the bus bar module was piled up to the part of the other end side of a battery assembly, (c) is a figure which shows the whole bus bar module battery assembly. It is a figure which shows the state which was piled up on the body and the said bus bar module was attached to the said battery assembly. It is a top view which shows a part of bus bar module which concerns on the 2nd Embodiment of this invention, and is a top view which shows the said bus bar module in the state in which the 1st pitch adjustment means and the 2nd pitch adjustment means are undeformed. It is a top view which shows a part of bus bar module which concerns on the 2nd Embodiment of this invention, and is a top view which shows the said bus bar module in the state by which the 1st pitch adjustment means and the 2nd pitch adjustment means were shrunk | reduced. It is an exploded view of the conventional bus bar module.

(First embodiment)
A bus bar module and a method of assembling the bus bar module according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a power supply device including a bus bar module according to a first embodiment of the present invention and a battery assembly to which the bus bar module is attached. FIG. 2 is a schematic view of a battery constituting the battery assembly shown in FIG. FIG. 3 is a plan view showing a part of the bus bar module shown in FIG. 1, and is a plan view showing the bus bar module in a state where the first pitch adjusting means and the second pitch adjusting means are not deformed. 4 is a plan view of the plate shown in FIG. 3 viewed from the direction of arrow A in FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is a plan view showing a part of the bus bar module shown in FIG. 1, and is a plan view showing the bus bar module in a state in which the first pitch adjusting means and the second pitch adjusting means are extended to the maximum. FIG. 7 is a plan view showing a part of the bus bar module shown in FIG. 1, and is a plan view showing the bus bar module in a state where the first pitch adjusting means and the second pitch adjusting means are contracted. FIG. 8 is an explanatory view for explaining a mounting method for attaching the bus bar module shown in FIG. 1 to the battery assembly shown in FIG. 1, and (a) shows one end of the bus bar module superimposed on one end of the battery assembly. (B) is a figure which shows the state by which the part of the other end side of the bus bar module was piled up to the part of the other end side of a battery assembly, and (c) is the figure which shows the whole bus bar module. FIG. 3 is a diagram showing a state where the bus bar module is attached to the battery assembly by being stacked on the battery assembly.

  A bus bar module 1 shown in FIG. 1 is attached to the battery assembly 2 shown in FIG. The power supply device 80 is mounted on an electric vehicle that travels using an electric motor, a hybrid vehicle that travels using both an engine and an electric motor, and supplies power to the electric motor.

  The battery assembly 2 includes a plurality of batteries 3 and a member that fixes the plurality of batteries 3 so as to overlap each other. As shown in FIG. 2, each battery 3 includes a rectangular battery body 30 and a pair of electrodes 31 and 32 protruding from one end and the other end of the upper surface of the battery body 30. Yes. Moreover, the electrode 31 of a pair of electrodes 31 and 32 is a positive electrode, and the electrode 32 is a negative electrode. Each of these electrodes 31 and 32 is formed in a cylindrical shape from a conductive metal. Further, the plurality of batteries 3 are alternately stacked in opposite directions so that the positive electrodes 31 and the negative electrodes 32 of the batteries 3 adjacent to each other are adjacent to each other. 1 indicates the overlapping direction of the plurality of batteries 3 and the longitudinal direction of the battery assembly 2, the arrow Z indicates the width direction of the battery assembly 2, and the arrow Y indicates the battery assembly. The height direction of the body 2 is shown.

  The bus bar module 1 mainly connects the plurality of batteries 3 described above in series. As shown in FIG. 1, the electrodes 31 and 32 of the batteries 3 adjacent to each other in the battery assembly 2 are connected to each other. A plurality of bus bars 6 connecting the plurality of batteries 3 in series, a plurality of terminals 7 connected to each bus bar 6 for detecting the voltage of each battery 3, and a plurality of electric wires 8 connected to each terminal 7 A thermistor that is a sensor for measuring the temperature of a predetermined battery 3 among the plurality of batteries 3, a plurality of wires connected to each thermistor, and a plurality of wires 8 having one end connected to each terminal 7 or each thermistor. A connector to which the other end is connected, and a synthetic resin plate 11 accommodating these. The connector connects the terminal 7 and the thermistor to a voltage detection circuit and a temperature measurement circuit (not shown) by connecting the connector to the counterpart connector.

  The bus bar 6 is obtained by pressing a conductive metal plate or the like. The adjacent electrodes 31 and 32 of the adjacent batteries 3 are passed through the plate-like metal plate. In this configuration, a pair of holes 61 are provided. The bus bar 6 is fixed to the battery 3 by screwing nuts into the electrodes 31 and 32 passed through the holes 61.

  The terminal 7 is obtained by, for example, pressing a conductive metal plate. As shown in FIG. 3 and the like, the terminal 7 is overlaid on the bus bar 6 and electrically connected to the bus bar 6. It has the connection part 71, the electric wire attachment part 73 attached to the end of the electric wire 8, and the electric wire connection part 72. As shown in FIG. The bus bar connection portion 71 has a configuration in which a hole 71a through which the electrodes 31 and 32 are passed is provided in a plate-shaped metal plate. The electric wire attachment portion 73 is composed of a pair of caulking pieces for caulking one end of the electric wire 8. The electric wire connecting portion 72 is composed of a pair of crimping pieces that crimp the core wire exposed at one end of the electric wire 8 and electrically connect the core wire. Moreover, the bus bar connection part 71, the electric wire connection part 72, and the electric wire attachment part 73 are arranged in order on a straight line. Moreover, the said electric wire 8 is a well-known covered electric wire which has a conductive core wire and the insulation coating which coat | covered this core wire, and the insulation coating is stripped and the core wire is exposed at the said one end.

  As shown in FIG. 1, the plate 11 is formed in a substantially rectangular shape with a planar shape as a whole substantially equal to the upper surface of the battery assembly 2. As shown in FIGS. 1, 3, 6, and 7, the plate 11 accommodates each thermistor and an electric wire connected to each thermistor, and follows the overlapping direction of the plurality of batteries 3, that is, the arrow X. The thermistor accommodating portions 27 arranged in parallel and the bus bars 6 and the terminals 7 connected to the bus bars 6 are accommodated, and a plurality of first lines arranged along the overlapping direction of the plurality of batteries 3, that is, the arrows X. The housing portion 12 and a bowl-shaped wire housing portion 20 that can house a plurality of wires 8 connected to each terminal 7 by being arranged in a plurality on a straight line parallel to the arrangement direction of the plurality of first housing portions 12 are configured. A plurality of second housing portions 14 that are connected to the second housing portion 14 via hinges 17 and a plurality of lid portions 16 that open and close the opening of the second housing portion 14 and face each other with a space therebetween. The first housing portion 12 and the second housing portion 14 are connected to each other, and the electric wire 8 and the end 7 and a plurality of third accommodating portions 21 that accommodate the connecting portions with the first and second accommodating portions 12 that are adjacent to each other, and a plurality of second accommodating portions that adjust the positional deviation between the bus bar 6 and the electrodes 31 and 32. One hinge 13 (corresponding to the first pitch adjusting means in the claims) and a plurality of second hinges 15 (second pitch adjusting means in the claims) for changing the interval between the second accommodating portions 14 adjacent to each other. And arranged in the electric wire housing part 20 at intervals along the arrangement direction of the plurality of first housing parts 12 and arranged in pairs at positions where the second hinge 15 is positioned between them. And a plurality of pairs of fixing portions 18 for fixing the plurality of electric wires 8 integrally. 3, 6, and 7 show a state in which the lid portion 16 opens the opening of the second housing portion 14.

  The thermistor accommodating portion 27 is disposed at the center in the width direction of the plate 11, that is, the center in the arrow Z direction, and is disposed from one end to the other end in the longitudinal direction of the plate 11, that is, the arrow X direction.

  The plurality of first accommodating portions 12 are arranged along the longitudinal direction of the plate 11, that is, along the arrow X. Moreover, the mutually adjacent 1st accommodating parts 12 are spaced apart. In addition, the rows in which the plurality of first accommodating portions 12 are arranged are provided in two rows along the width direction of the plate 11, that is, along the arrow Z at intervals. The plurality of first accommodating portions 12 are arranged at positions where the thermistor accommodating portions 27 are positioned between the aforementioned rows. Moreover, each 1st accommodating part 12 is formed in box shape by the bottom wall 12a which positions the bus bar 6 on the surface, and the surrounding wall 12b standingly arranged from the outer edge of this bottom wall 12a, as shown in FIG. ing. The bottom wall 12a is provided with a hole that overlaps the hole 61 of the bus bar 6, and the electrodes 31, 32 passed through the hole are passed through the hole 61 of the bus bar 6 and the hole 71a of the terminal 7. The

  The plurality of second accommodating portions 14 are arranged along the longitudinal direction of the plate 11, that is, along the arrow X. Moreover, the 2nd accommodating parts 14 adjacent to each other are spaced apart. Moreover, the row | line | column with which these several 2nd accommodating parts 14 were arranged, ie, the electric wire accommodating part 20, is provided in two rows along the width direction of the plate 11, ie, along the arrow Z, mutually spaced apart. Yes. The plurality of second housing portions 14 are arranged at positions where the above-described rows, that is, the rows in which the plurality of first housing portions 12 are arranged between the wire housing portions 20 are positioned. Moreover, each 2nd accommodating part 14 has the bottom wall 14a which positions the some electric wire 8 on the surface, and the side wall 14b standingly arranged from the both ends of the arrow Z direction of this bottom wall 14a, as shown in FIG. , Is formed into a bowl shape. Each of the second accommodating portions 14 has an upper wall 14c that protrudes in a direction opposite to the bottom wall 14a from an upper end portion of the side wall 14b that is away from the bottom wall 14a. The upper wall 14c positions the electric wire 8 between the upper wall 14a and the electric wire 8 to prevent the electric wire 8 from jumping out of the second accommodating portion 14.

  As shown in FIG. 3 and the like, the third housing portion 21 is formed along the width direction of the plate 11, that is, along the arrow Z, and the bottom wall 12 a of the first housing portion 12 and the second housing portion 14 that face each other. A bottom wall 21a connected to the bottom wall 14a, and a peripheral wall 12b of the first housing portion 12 and a side wall of the second housing portion 14 which are provided upright from the outer edge of the bottom wall 21a and face each other along the width direction of the plate 11 It is formed in a bowl shape by a pair of connecting walls 21b connecting 14b. The bottom wall 21a positions a connection portion between the electric wire 8 and the terminal 7 on the surface. The “connection portion” means the wire attachment portion 73 and the wire connection portion 72 of the terminal 7 and one end of the electric wire 8 to which the wire attachment portion 73 and the wire connection portion 72 are attached. Further, one end of the electric wire 8 accommodated in the electric wire accommodating portion 20 is bent by approximately 90 degrees and accommodated in the third accommodating portion 21.

  As shown in FIGS. 3 and 5, the first hinge 13 connects the peripheral walls 12 b of the first accommodating portions 12 adjacent to each other, and is formed to be elastically deformable. The first hinge 13 is formed in a C-shaped cross section, and elastically deforms, that is, expands and contracts in a direction in which both ends of the C-shape approach each other, or in a direction in which both ends of the C-shape are separated from each other. Thus, the space | interval between the 1st accommodating parts 12 adjacent to each other is changed by elastically deforming. Further, such first hinges 13 are arranged every other first accommodating portion 12. Further, V1 in FIG. 3, V2 in FIG. 6, and V3 in FIG. 7 each represent a distance between the first accommodating portions 12 adjacent to each other.

  As shown in FIGS. 3 and 4, the second hinge 15 connects the second accommodating portions 14 adjacent to each other, and is formed to be elastically deformable. The second hinge 15 is formed in a C-shaped cross section, and elastically deforms, that is, expands and contracts in a direction in which both ends of the C-shape approach each other, or in a direction in which both ends of the C-shape are separated from each other. Thus, the space | interval between the 2nd accommodating parts 14 adjacent to each other is changed by elastically deforming. Further, the second hinges 15 are arranged in pairs at both end portions in the arrow Z direction of the second housing portion 14 in order to avoid an obstacle on the routing route of the plurality of electric wires 8. . Further, such second hinges 15 are arranged every other second accommodating portion 14. Further, W1 in FIG. 3, W2 in FIG. 6, and W3 in FIG. 7 each represent an interval between the second accommodating portions 14 adjacent to each other.

  The fixing portion 18 is composed of two protrusions protruding in a columnar shape from the bottom wall 14a. The two protrusions are arranged along the width direction of the plate 11, that is, along the arrow Z, with a space between each other, and the plurality of electric wires 8 are sandwiched between the plurality of electric wires 8. To fix.

  Further, as shown in FIG. 1 and the like, each of the plurality of electric wires 8 has the other end connected to the connector positioned at one end in the arrow X direction of the plate 11, and from the one end of the plate 11 to the inside of the electric wire housing 20. Is routed toward the other end of the plate 11. Then, one end of each electric wire 8 attached to the electric wire attaching portion 73 and the electric wire connecting portion 72 of each terminal 7, that is, the connecting portion is in the third accommodating portion 21 in which the electric wire attaching portion 73 and the electric wire connecting portion 72 are accommodated. Is housed in. Further, the plurality of electric wires 8 arranged in this manner are fixed by the fixing portion 18 described above in the electric wire accommodating portion 20.

  Further, the plurality of electric wires 8 described above are formed on the plate 11 in a state where each bus bar 6 is positioned at a position connectable to each electrode 31, 32 of the battery assembly 2 formed in the maximum dimension within the tolerance range. The length is formed so as to reach from the one end to the third accommodating portion 21 that accommodates the connecting portion of each electric wire 8.

  That is, the plate 11 is stretched to the maximum along the arrangement direction of the plurality of first accommodating portions 12 that are the overlapping direction of the batteries 3, as shown in FIG. 6, between the first accommodating portions 12 adjacent to each other. The distance between the second accommodating portions 14 adjacent to each other is W2, and the hole 61 of the bus bar 6 located at the one end of the plate 11 in this state is connected to the other end of the plate 11. The distance to the hole 61 of the bus bar 6 positioned from the electrodes 31 and 32 positioned at one end in the arrow X direction of the battery assembly 2 formed in the maximum dimension within the tolerance range to the other in the arrow X direction of the battery assembly 2 It is formed to be larger than the distance to the electrodes 31 and 32 located at the ends.

  And in this invention, in the state which the plate 11 was extended to the maximum in this way, it fixes to the fixing | fixed part 18 in the state where the some electric wire 8 was extended straightly so that it may not be pulled, and is accommodated in the plate 11 ing. For this reason, the plate 11 when being attached to the battery assembly 2 formed in the maximum dimension within the tolerance range is in a loosened state, that is, a state in which the amount of extension is small, compared to the state shown in FIG. Therefore, even when the present bus bar module 1 is attached to the battery assembly 2 formed to the maximum dimension within the tolerance range, the electric wire 8 is not pulled. That is, the electric wire 8 is not pulled more than the state shown in FIG.

  In the present invention, when the plate 11 shown in FIG. 3 is not stretched, that is, when the first hinge 13 and the second hinge 15 are not deformed, the distance between the first accommodating portions 12 adjacent to each other is A plurality of electric wires 8 are formed between the pair of fixed portions 18 so that V1 is smaller than V2 shown in FIG. 6 and the interval between the second accommodating portions 14 adjacent to each other is W1 smaller than W2 shown in FIG. In this case, an extra length, that is, sagging occurs. However, in the present invention, since the plurality of electric wires 8 are fixed at each fixing portion 18, a large extra length, that is, sagging is not concentrated in one place, and therefore the electric wires 8 flutter. There is no risk of being bent or excessively bent or caught by other parts.

  Further, in the present invention, in a state where the plate 11 shown in FIG. 7 is contracted, that is, in a state where the first hinge 13 and the second hinge 15 are contracted, the interval between the first accommodating portions 12 adjacent to each other is V3 is smaller than V1 shown in FIG. 3, and the interval between the second accommodating portions 14 adjacent to each other is W3 smaller than W1 shown in FIG. 3. Further extra length, i.e. sagging, occurs. However, in the present invention, as described above, since the plurality of electric wires 8 are fixed in each fixing portion 18, a large extra length, that is, a slack is not concentrated in one place. There is no possibility that 8 will flutter, bend excessively, or be caught by other parts.

  That is, the bus bar module 1 according to the present invention secures the electric wires 8 at a plurality of locations while securing extra lengths at the plurality of locations so that the electric wires 8 are not pulled even when the plate 11 is stretched. Therefore, it becomes suitable for attaching to the battery assembly 2 having a large accumulated tolerance (± 10 mm to 15 mm).

  Moreover, although detailed description about the accommodation structure of the some electric wire connected to each thermistor is abbreviate | omitted, the plate 11 which expands-contracts according to the dimension of the battery assembly 2 also about this electric wire similarly to the electric wire 8 mentioned above. The housing structure is provided with a surplus length for preventing the occurrence of pulling corresponding to, and provided with electric wire fixing means similar to the fixing portion 18.

  Then, the assembly method of the bus bar module 1 of the said structure is demonstrated. When assembling the bus bar module 1, the plate 11, the bus bar 6, the terminal 7, etc. are manufactured separately, and then each bus bar 6 is fitted into each first accommodating portion 12 (the bus bar 6 is inserted into the plate 11. It may be molded.) Next, the plate 11 is stretched to the maximum along the direction in which the plurality of first accommodating portions 12 are arranged, that is, along the direction of the arrow X, and this state is maintained (corresponding to the “plate stretching step” in the claims). .) Next, the plurality of electric wires 8 are accommodated in the electric wire accommodating portion 20 of the stretched plate 11 by being pushed between the two protrusions constituting the fixing portion 18 in a state where the plural electric wires 8 are straightened. While accommodating the said connection part of each electric wire 8 and each terminal 7 in the predetermined | prescribed 3rd accommodating part 21 (equivalent to the "accommodating process" in a claim), each terminal 7 connected to each electric wire 8 is used. The bus bar connection portions 71 are fitted into the first accommodating portions 12 so as to overlap the bus bars 6. In the same manner, a plurality of electric wires and the thermistors connected to the electric wires are accommodated in the thermistor accommodating portion 27. Then, the pulling force applied to the stretched plate 11 is released, and the plate 11 is elastically returned to the unstretched state. Thus, the bus bar module 1 is assembled.

  Furthermore, the bus bar module 1 assembled in the above-described procedure is attached to the upper surface of the battery assembly 2 by the method shown in FIG. That is, as shown in FIG. 8A, first, one end of the bus bar module 1 in the direction of the arrow X is overlapped with one end of the battery assembly 2 in the direction of the arrow X, and the electrode located at one end of the battery assembly 2 31 and 32 are passed through the hole 61 of the bus bar 6 and the hole 71 a of the terminal 7. 8B, the bus bar module 1 is gradually overlapped with the battery assembly 2 toward the other end side in the arrow X direction. At this time, if a positive cumulative tolerance is generated in the battery assembly 2, the bus bar module 1 is stretched and adjusted to the pitch of the electrodes 31 and 32 of the battery assembly 2. Further, when a negative cumulative tolerance is generated in the battery assembly 2, the bus bar module 1 is contracted and adjusted to the pitch of the electrodes 31 and 32 of the battery assembly 2. Thus, as shown in FIG. 8C, the entire bus bar module 1 is overlaid on the battery assembly 2, and the bus bar module 1 is attached to the battery assembly 2. Thereafter, nuts are screwed into the electrodes 31 and 32 passed through the holes 61 and 71a, so that the electrodes 31 and 32 and the bus bars 6 are fixed, and the power supply apparatus is assembled.

  In this way, in the present invention, the bus bar module 1 is assembled so that the plurality of wires 8 are accommodated in the wire accommodating portion 20 of the stretched plate 11, so that the plurality of wires 8 are simply fixed in a state where they are straightened. The operation of bending the plurality of electric wires 8 to secure the extra length without considering the alignment between the plural electric wires 8 and each fixing portion 18 by pushing between the two protrusions constituting the portion 18 1 is easily assembled without securing the extra length of the electric wires 8 between the fixed portions 18 that are paired in a state where the plate 11 is not stretched.

  In addition, the bus bar module 1 is configured such that when the plate 11 is attached to the battery assembly 2, the extra length of the electric wires 8 is ensured evenly between the fixed portions 18 that are paired in a state where the plate 11 is not stretched. Even when 11 is stretched, the electric wire 8 is not partially pulled.

  Further, in the bus bar module 1, the first hinge 13 is arranged every other first accommodating part 12, and the second hinge 15 is arranged every other second accommodating part 14. The “adjustment allowance” for adjusting the positional deviation between each bus bar 6 and each electrode 31 and 32 due to the accumulated tolerance is larger than that of the conventional product. Therefore, it becomes more suitable for attaching to the battery assembly 2 having a large cumulative tolerance.

  In addition, the bus bar module 1 shown in the present embodiment includes the lid portion 16 that covers the opening of the second housing portion 14 in which the plurality of wires 8 are housed. In the present invention, the plurality of wires 8 are fixed. That is, since it has the fixing | fixed part 18 which prevents the some electric wire 8 jumping out from the 2nd accommodating part 14, it can also be set as the structure which abbreviate | omitted the cover part 16. FIG. In that case, the bus bar module can be reduced in weight and simplified, and the flexibility of the plate can be improved, that is, the ease of attaching the bus bar module to the battery assembly 2 can be improved. it can.

(Second Embodiment)
Subsequently, a bus bar module and a method for assembling the bus bar module according to the second embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. 9 is a plan view showing a part of the bus bar module according to the second embodiment of the present invention, and is a plan view showing the bus bar module in a state where the first pitch adjusting means and the second pitch adjusting means are not deformed. is there. FIG. 10 is a plan view showing a part of the bus bar module according to the second embodiment of the present invention, and is a plan view showing the bus bar module in a state where the first pitch adjusting means and the second pitch adjusting means are contracted. is there. 9 and 10, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  In the bus bar module 1 ′ of the present embodiment, a first hinge 13 ′ (corresponding to the first pitch adjusting means in the claims) that is elastically deformable connects the first accommodating portions 12 adjacent to each other. The second hinge 15 ′ that is elastically deformable (corresponding to the second pitch adjusting means in the claims) has a plate 11 ′ that connects the second accommodating portions 14 adjacent to each other.

  The plate 11 ′ is in a state in which the plate 11 ′ shown in FIG. The distance between the second accommodating portions 14 adjacent to each other is W2, and the plate 11 ′ from the hole 61 of the bus bar 6 located at one end in the arrow X direction of the plate 11 ′ in this state The battery assembly from the electrodes 31 and 32 positioned at one end in the arrow X direction of the battery assembly 2 formed so that the distance to the hole 61 of the bus bar 6 positioned at the other end in the arrow X direction is the maximum dimension within the tolerance range. It is formed to be larger than the distance to the electrodes 31 and 32 located at the other end of the body 2 in the arrow X direction.

  In the present invention, the plate 11 ′ is not stretched as described above, and is fixed to the fixing portion 18 in a state where the plurality of electric wires 8 are straightly stretched so as not to be pulled, and accommodated in the plate 11 ′. Has been. For this reason, the plate 11 ′ when attached to the battery assembly 2 formed in the maximum dimension within the tolerance range is in a contracted state as compared with the unstretched state shown in FIG. Even when 1 'is attached to the battery assembly 2 formed to have the maximum dimension within the tolerance range, the electric wire 8 is not pulled. That is, the electric wire 8 is not pulled more than the state shown in FIG.

  Further, in the present invention, when the plate 11 ′ shown in FIG. 10 is contracted, that is, when the first hinge 13 ′, the second hinge 15 ′, etc. are contracted, between the first accommodating portions 12 adjacent to each other. Since the interval is V1 smaller than V2 shown in FIG. 9, and the interval between the second accommodating portions 14 adjacent to each other is W1 smaller than W2 shown in FIG. Extra length, that is, sagging occurs in the electric wire 8. However, in the present invention, since the plurality of electric wires 8 are fixed at each fixing portion 18, a large extra length, that is, sagging is not concentrated in one place, and therefore the electric wires 8 flutter. There is no risk of being bent or excessively bent or caught by other parts.

  When assembling the bus bar module 1 ′ having the above-described configuration, a state in which a plurality of wires 8 are straightly extended in the wire accommodating portion 20 of the plate 11 ′ in a state where no external force is applied, that is, in a state where it is not stretched. House and assemble in. At this time, the plurality of electric wires 8 are accommodated in the electric wire accommodating portion 20 by being pushed between the two protrusions constituting the fixing portion 18 in a state where the plural electric wires 8 are straightened.

  As described above, according to the present invention, the plate 11 ′ is not stretched, that is, the first hinge 13 ′, the second hinge 15 ′, etc. are not deformed, and is positioned at one end in the arrow X direction of the plate 11 ′. One end of the battery assembly 2 in the direction of the arrow X in which the distance from the hole 61 of the bus bar 6 to the hole 61 of the bus bar 6 located at the other end of the plate 11 ′ in the direction of the arrow X is within the tolerance range. Is formed to be larger than the distance from the electrodes 31 and 32 positioned at the other end to the electrodes 31 and 32 positioned at the other end of the battery assembly 2 in the arrow X direction. The bus bar module 1 ′ can be assembled by an easy assembling operation in which the plurality of wires 8 are accommodated straightly in the wire accommodating portion 20 of the plate 11 ′ that is not stretched. .

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. Various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1,1 'Bus bar module 2 Battery assembly 3 Battery 6 Bus bar 7 Terminal 8 Electric wire 11, 11' Plate 12 1st accommodating part 13, 13 '1st hinge (1st pitch adjustment means)
14 2nd accommodating part 15, 15 '2nd hinge (2nd pitch adjustment means)
18 Fixing part 20 Electric wire accommodating part 21 Third accommodating part 31, 32 Electrode

Claims (5)

  1. By connecting the electrodes of the batteries adjacent to each other in a battery assembly formed by alternately stacking a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end. A plurality of bus bars connecting the batteries in series, a plurality of terminals connected to the bus bars to detect the voltage of the battery, a plurality of electric wires connected to the terminals, the plurality of bus bars, and the plurality A bus bar module having a plate made of synthetic resin containing the terminals and the plurality of electric wires,
    The plate is
    A plurality of first accommodating portions that accommodate the bus bars and the terminals connected to the bus bars, and are arranged along an overlapping direction of the plurality of batteries;
    A plurality of second housings constituting a bowl-shaped wire housing portion that can house the plurality of wires connected to the terminals by being arranged in a plurality on a straight line parallel to the arrangement direction of the plurality of first housing portions. And
    A plurality of third housing portions for connecting the first housing portion and the second housing portions facing each other, housing a connection portion between the electric wire and the terminal;
    A plurality of first pitch adjusting means for adjusting a positional deviation between the bus bar and the electrode by changing an interval between the first accommodating portions adjacent to each other;
    A plurality of second pitch adjusting means for changing the interval between the second accommodating portions adjacent to each other;
    The wire accommodating portions are arranged at intervals along the direction in which the plurality of first accommodating portions are arranged, and are arranged in pairs at positions where the second pitch adjusting means is positioned between the plurality of first accommodating portions, A plurality of pairs of fixing portions for fixing the electric wire, and
    The length of each of the plurality of electric wires is such that each bus bar is positioned from one end of the plate in a state where each bus bar is positioned at a position connectable to each electrode of the battery assembly formed in the maximum dimension within a tolerance range. A bus bar module having a length that reaches the third housing portion that houses the connecting portion.
  2.   The plurality of electric wires are accommodated in the electric wire accommodating portion of the plate extended to the maximum along the arrangement direction of the plurality of first accommodating portions, and the connection portion of each electric wire is the predetermined third accommodating portion. The bus bar module according to claim 1, wherein the bus bar module is housed and assembled.
  3. The first pitch adjusting means is composed of an elastically deformable first hinge that connects the first accommodating portions adjacent to each other, and the second pitch adjusting means is adjacent to the second accommodating portions. And an elastically deformable second hinge connected to each other, and
    With the plurality of first hinges and the plurality of second hinges being in an undeformed state, the plurality of first housings of the plate from the bus bar positioned at one end of the plates in the arrangement direction of the plurality of first housing portions. The battery assembly from the electrode located at one end in the overlapping direction of the plurality of batteries of the battery assembly, wherein the distance to the bus bar located at the other end in the arrangement direction of the parts is a maximum dimension within a tolerance range 2. The bus bar module according to claim 1, wherein the plate is formed so as to be larger than a distance to the electrode located at the other end of the body in the overlapping direction of the plurality of batteries.
  4.   The first pitch adjusting means is disposed at every one of the first accommodating portions, and the second pitch adjusting means is disposed at every one of the second accommodating portions. 4. The bus bar module according to item 1 of 3.
  5. By connecting the electrodes of the batteries adjacent to each other in a battery assembly formed by alternately stacking a plurality of batteries each having a positive electrode at one end and a negative electrode at the other end. A plurality of bus bars connecting the batteries in series, a plurality of terminals connected to the bus bars to detect the voltage of the battery, a plurality of electric wires connected to the terminals, the plurality of bus bars, and the plurality A plate made of synthetic resin containing the terminals and the plurality of electric wires,
    The plate accommodates the bus bars and the terminals connected to the bus bars, and includes a plurality of first accommodating portions arranged in an overlapping direction of the plurality of batteries, and the plurality of first accommodating portions. A plurality of second accommodating portions constituting a bowl-shaped electric wire accommodating portion capable of accommodating the plurality of electric wires connected to each terminal by being arranged in a plurality on a straight line parallel to the arrangement direction, and the first opposing each other. By connecting 1 accommodating part and said 2nd accommodating part, and changing the space | interval between the some 3rd accommodating part which accommodates the connection part of the said electric wire and the said terminal, and the said 1st accommodating part adjacent to each other. A plurality of first pitch adjusting means for adjusting a positional deviation between the bus bar and the electrode; a plurality of second pitch adjusting means for changing a distance between the second accommodating parts adjacent to each other; and In the direction in which the plurality of first accommodating portions 12 are arranged What are arranged in pairs in a position to position the second pitch adjusting means therebetween while being spaced have a fixed portion of the plurality of pairs of fixing the plurality of wires,
    The length of each of the plurality of electric wires is such that each bus bar is positioned from one end of the plate in a state where each bus bar is positioned at a position connectable to each electrode of the battery assembly formed in the maximum dimension within a tolerance range. A method of assembling a bus bar module formed to a length that reaches the third housing portion that houses the connecting portion,
    A plate stretching step of stretching the plate to the maximum along the arrangement direction of the plurality of first accommodating portions;
    Accommodating the plurality of electric wires in the electric wire accommodating portion of the stretched plate, and accommodating the connection portion of each electric wire in a predetermined third accommodating portion; and
    A method of assembling a bus bar module, comprising:
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