JP2015165458A - bus bar module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bus bar module which can reduce a wasteful part while securing the positioning of a bus bar.SOLUTION: The bus bar module includes: a plurality of bus bars 6 for serially connecting mutually adjacent batteries in a battery assembly; and a resin plate 7 for housing and fixing the plurality of bus bars 6. The resin plate 7 includes a plurality of bus bar fixation parts 23. A bus bar 6 housed and fixed to the bus bar fixation parts 23 includes a pair of battery connection holes 10 formed and disposed with a predetermined space. Further, the bus bar 6 and the bus bar fixation part 23 include a bus-bar-side composite functional part 14 and a plate-side composite functional part 26 to fit to an intermediate position between the battery connection holes 10. The composite functional parts are formed to be a release-stop functional part of the bus bar 6 from the bus bar fixation part 23, a positioning functional part, a whirl-stop functional part and a fluctuation prevention functional part.

Description

  The present invention relates to a bus bar module for connecting adjacent batteries of a battery assembly in series.

  In a hybrid vehicle, an electric vehicle, and the like, a bus bar module is used to connect adjacent batteries of a battery assembly (battery assembly) mounted on the vehicle in series. The bus bar module disclosed in the following Patent Document 1 includes a plurality of bus bars and a resin plate. The resin plate has a plurality of bus bar fixing portions that individually accommodate and fix a plurality of bus bars. Hereinafter, a conventional bus bar and a bus bar fixing portion will be described with reference to FIG.

  In FIG. 11, reference numeral 101 denotes a conductive bus bar. Reference numeral 102 denotes a bus bar fixing portion having insulating properties. The bus bar 101 is formed so that adjacent batteries can be connected in series after being accommodated and fixed in the bus bar fixing portion 102. The bus bar 101 has a pair of battery connection holes 103 penetrating in a circular shape. The pair of battery connection holes 103 is formed as a portion through which a stud bolt-like electrode is inserted. The hole edge part of a pair of battery connection hole 103 is formed as a part pinched | interposed by a nut and the seat surface of a battery. In addition, the space between the pair of battery connection holes 103 and the hole edge portion are portions that contribute to energization.

  In the bus bar 101, the axial direction connecting the pair of battery connection holes 103 coincides with the bus bar longitudinal direction. The bus bar 101 has a pair of long side portions 104 parallel to the bus bar longitudinal direction and a pair of short side portions 105 parallel to the direction orthogonal to the bus bar longitudinal direction. The bus bar 101 is formed in a rectangular shape in plan view. Note that small cut-out portions 106 are formed at the four corner portions of the bus bar 101 in order to avoid a 90-degree sharp portion.

  The bus bar fixing portion 102 has a bottom wall 107 whose outer shape is a rectangle, and a frame-shaped side wall 108 that is continuous with an end of the bottom wall 107. In the bottom wall 107, a pair of openings 109, a center receiving portion 110, and a plurality of outer shape receiving portions 111 are formed. A pair of opening part 109 is formed as a part corresponding to the electrode (seat surface) of a battery. The center receiving portion 110 is formed in a bridge shape so as to be positioned between the pair of openings 109 and receive the center of the bus bar 101. On the other hand, the outer shape receiving portion 111 is formed so as to receive the outer shape portion (outer edge portion) of the bus bar 101 around the pair of openings 109. Note that the portion denoted by reference numeral 112 is a portion generated in order to form a bus bar locking projection 115 described later.

  The side wall 108 includes a pair of long side walls 113 parallel to the bus bar longitudinal direction and a pair of short side walls 114 parallel to a direction orthogonal to the bus bar longitudinal direction. The pair of long side walls 113 and the pair of short side walls 114 are arranged and formed in accordance with the outer shape of the bus bar 101. The pair of long side walls 113 are respectively formed with claw-like bus bar locking protrusions 115 that protrude inwardly. The pair of bus bar locking projections 115 are arranged and formed in accordance with the position of the center receiving portion 110. The pair of bus bar locking projections 115 are arranged and formed at positions separated from the center receiving portion 110 by the thickness of the bus bar 101 in the wall height direction.

  In the above configuration and structure, when the bus bar 101 is accommodated and fixed to the bus bar fixing portion 102, it is necessary to push the bus bar 101 in the direction perpendicular to the paper surface of FIG. In the middle of pushing, the pair of long side portions 104 of the bus bar 101 abuts against the pair of bus bar locking projections 115 of the bus bar fixing portion 102, thereby pushing the pair of long side walls 113 of the bus bar fixing portion 102 outward and elastically deforming. To do. When the pair of long side portions 104 ride over and pass through the pair of bus bar locking projections 115 that have moved outward due to elastic deformation, the bus bar 101 is moved by the center receiving portion 110 of the bus bar fixing portion 102 and the pair of bus bar locking projections 115. It is fixed in a sandwiched state. In addition, the bus bar 101 is received by the plurality of outer shape receiving portions 111 of the bus bar fixing portion 102, and the bus bar 101 is surrounded by the pair of long side walls 113 and short side walls 114 of the bus bar fixing portion 102 and is held without backlash. It is fixed to the state.

JP 2004-31049 A

  In the above prior art, when the bus bar 101 is accommodated and fixed in the bus bar fixing portion 102, the position of the bus bar 101 is surely determined by the shape of the bus bar 101 and the bus bar fixing portion 102. This is because the outer portion of the bus bar 101 is used for positioning and rotation prevention.

  By the way, with respect to the bus bar 101, it can be said that it is preferable in terms of the reduction of materials used to reduce the portion that does not contribute to energization. In the above prior art, it seems that there are many parts that do not contribute to energization, and it is considered that it is necessary to review the shapes of the bus bar 101 and the bus bar fixing part 102 in order to reduce useless parts and reduce the materials used.

  In addition, in the above prior art, in order to eliminate rattling, in other words, in order to ensure positioning and rotation prevention, the outer portion of the bus bar 101 is connected to the pair of long side walls 113 and short side walls 114 of the bus bar fixing portion 102. Therefore, for example, a resin plate molding die needs to be manufactured with high dimensional accuracy. If the dimensional accuracy cannot be increased, molding defects may occur. In this case, there is a problem that the housing and fixing of the bus bar 101 to the bus bar fixing portion 102 cannot be performed.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a bus bar module capable of reducing wasteful portions while ensuring positioning of the bus bars and the like. Another object is to provide a bus bar module that can contribute to the reduction of molding defects.

  In order to solve the above-mentioned problem, the present invention according to claim 1, wherein a plurality of bus bars connecting in series the adjacent batteries of a battery assembly including a plurality of batteries, and bus bar fixing for accommodating and fixing the bus bars are provided. And a bus bar module having a pair of battery connection portions arranged and formed at predetermined intervals, wherein the bus bar fixing portion and the bus bar are connected to the bus bar fixing portion. Each of which has a composite function part which becomes at least a retaining function part and a positioning function part, and the composite function part is formed in accordance with an intermediate position of the pair of battery connection parts.

  According to a second aspect of the present invention, in the bus bar module according to the first aspect, the composite function part is formed so as to be a detent function part of the bus bar with respect to the bus bar fixing part.

  According to a third aspect of the present invention, in the bus bar module according to the second aspect, the composite function portion is formed so as to be a swing prevention function portion of the bus bar with respect to the bus bar fixing portion. .

  According to the first aspect of the present invention, since at least the retaining function portion and the positioning function portion are centrally arranged in accordance with the portion contributing to the energization of the bus bar, the portion that does not contribute to the energization compared to the conventional example. The structure can be simplified. Therefore, according to the present invention, there is an effect that it is possible to reduce useless portions while ensuring the bus bar is prevented from being detached and positioned. Further, according to the present invention, along with the simplification, for example, the dimensional accuracy of a molding die or the like is relaxed, and as a result, there is an effect that the defective product rate can be reduced. Furthermore, according to the present invention, there is an effect that the bus bar can be miniaturized with the simplification.

  According to the second aspect of the present invention, the structure of the portion that does not contribute to energization can be further simplified because the anti-rotation function portion is also concentrated and disposed. That is, there is an effect that it is possible to further reduce the useless portion while ensuring the rotation prevention of the bus bar. Moreover, according to this invention, the effect that the further reduction of a defective product rate can be aimed at with the said simplification, and the effect that the further size reduction of a bus-bar can be achieved are also show | played.

  According to the third aspect of the present invention, the structure of the portion that does not contribute to energization can be further simplified because the rocking prevention function portion is also concentrated and disposed. That is, there is an effect that it is possible to further reduce the useless portion while ensuring the prevention of the swinging of the bus bar. Moreover, according to this invention, the effect that the further reduction of a defective product rate can be aimed at with the said simplification, and the effect that the further size reduction of a bus-bar can be achieved are also show | played.

It is a perspective view which shows the state just before attaching the bus-bar module of this invention to one side of a battery assembly. It is a perspective view of the bus-bar module of FIG. It is a front view of the bus-bar module of FIG. It is a perspective view of the bus bar which comprises the bus-bar module of FIG. It is a perspective view of the resin plate which comprises the bus-bar module of FIG. 1 (the inside is an enlarged perspective view of a bus-bar fixing | fixed part). It is a front view of the bus-bar fixing | fixed part of FIG. It is a perspective view (the inside of a circle is an expansion perspective view) of the state where the bus bar was stored and fixed to the bus bar fixing part. It is a front view of the state which accommodated and fixed the bus bar to the bus bar fixing | fixed part. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is a front view of the bus bar and bus bar fixing part of a conventional example.

  The bus bar module includes a plurality of bus bars for connecting adjacent batteries of the battery assembly in series and a resin plate for accommodating and fixing the plurality of bus bars. The resin plate has a plurality of bus bar fixing portions. The bus bar accommodated and fixed in the bus bar fixing portion has a pair of battery connection portions arranged and formed at a predetermined interval. Further, the bus bar and the bus bar fixing part have a composite function part in accordance with an intermediate position between the pair of battery connection parts. The composite function part is formed to be a bus bar retaining function part and a positioning function part with respect to the bus bar fixing part. The composite function part is further formed to be a rotation prevention function part and a swing prevention function part.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view showing a state immediately before the bus bar module of the present invention is attached to one side surface of a battery assembly. 2 is a perspective view of the bus bar module of FIG. 1, and FIG. 3 is a front view of the bus bar module of FIG.

  In FIG. 1, the bus bar module 1 is attached to, for example, one side surface S of the battery assembly 2 (not only the one side surface S but also the upper surface). The battery assembly 2 is a high-voltage battery mounted at a predetermined position of a hybrid vehicle or an electric vehicle, and is formed by arranging a plurality of batteries 3. Each battery 3 is provided with electrodes 4 and 5 used as a positive electrode and a negative electrode. The electrodes 4 and 5 are provided on one side of the battery at a predetermined interval. The battery assembly 2 is arranged so that the electrodes 4 and 5 facing each other between adjacent batteries 3 become a plus electrode and a minus electrode. The battery assembly 2 has various forms, and one shown in the figure is one.

  1 to 3, the bus bar module 1 includes a plurality of bus bars 6 having conductivity and a resin plate 7 having insulation properties. External device attachment means 8 is provided at an intermediate position of the bus bar module 1. Further, at both end positions of the bus bar module 1, electric wire connecting means 9, 9 are provided, respectively. The external device attachment means 8 is an electrical connection portion with an external device (not shown), and is formed in a state where terminals can be fastened from above the battery assembly 2. On the other hand, the electric wire connecting means 9, 9 can be electrically connected to a positive electrode power cable (high voltage resistant electric wire, not shown) and a negative electrode power cable (high voltage resistant electric wire, not shown). It is formed in the state.

  Hereinafter, the bus bar 6 and the resin plate 7 will be described. First, the bus bar 6 will be described with reference to FIG. 4 is a perspective view of the bus bar 6 constituting the bus bar module 1 of FIG.

  In FIG. 4, the bus bar 6 is formed by pressing a conductive metal plate made of, for example, copper or copper alloy. The bus bar 6 is formed in a substantially rectangular shape with four corners cut off as shown. Moreover, the bus bar 6 is formed in a shape such that the outer portion is smaller than the bus bar 101 of the conventional example (see FIG. 11). That is, it is formed in a shape that reduces the portion that does not contribute to energization. The bus bar 6 is formed on a front and back flat surface.

  The bus bar 6 is formed with a pair of battery connection holes 10 (battery connection portions). The pair of battery connection holes 10 is formed in a shape penetrating in a circle as a connection portion with the electrodes 4 and 5 (see FIG. 1). The pair of battery connection holes 10 are arranged and formed in accordance with the distance between the electrodes 4 and 5. The bus bar 6 is formed as a portion where the portion between the pair of battery connection holes 10 and the hole edge contribute to energization.

  Note that the shape of the pair of battery connection holes 10 is not limited to a perfect circle shape as in the present embodiment, and may be an elliptical shape, an elliptical shape, or a slit shape, for example. That is, a shape intended to absorb dimensional errors is also possible.

  When the direction of the axis connecting the pair of battery connection portions 10 (arrow X direction) is the longitudinal direction of the bus bar 6 (bus bar longitudinal direction), the bus bar 6 is formed with a pair of long side portions 11 parallel to the bus bar longitudinal direction. The Further, the bus bar 6 is formed with a pair of short side portions 12 parallel to a direction (arrow Y direction) orthogonal to the bus bar longitudinal direction, and cut-out portions 13 at the four corner portions. Further, the bus bar 6 is formed with a bus bar side composite function portion 14 which is a characteristic part of the present invention.

  The bus bar side composite function part 14 is disposed and formed between the pair of battery connection holes 10. That is, it is arranged and formed in the central portion of the bus bar 6. The bus bar side composite function part 14 is formed on the bus bar 6 side so as to be a retaining function part, a positioning function part, a rotation preventing function part, and a swing prevention function part.

  In this embodiment, the bus bar side composite function portion 14 is composed of two types of portions, that is, a flat plate portion 15 and a plurality of protrusions 16. It is formed as a part having four functions.

  The flat plate portion 15 is formed as a retaining function portion for a bus bar fixing portion 23 (see FIGS. 5 and 6), which will be described later, of the resin plate 7. In other words, it is formed as a portion in which the movement of the bus bar 6 in the direction of arrow Z is restricted when it is accommodated and fixed in the bus bar fixing portion 23.

  The flat plate portion 15 is formed as a portion where the central portion particularly contributes to energization, that is, an energization contributing portion 15a. The flat plate portion 15 is formed as a portion on which the back surface is placed on a bridge portion 28 (see FIGS. 5 and 6) described later of the bus bar fixing portion 23, that is, a placement surface 15b. Further, the flat plate portion 15 is a portion where the portion of the pair of long side portions 11 on this surface is hooked and locked to a locking arm 31a (see FIGS. 5 and 6) described later of the bus bar fixing portion 23, that is, the covered portion. It is formed as a locking portion 15c. The locked portions 15c are formed to be a pair in the arrow Y direction.

  A plurality of protrusions 16 are formed as described above. The plurality of projecting portions 16 are formed as a positioning function portion and a rotation preventing function portion for a bus bar fixing portion 23 (see FIGS. 5 and 6) described later. In other words, as a portion in which the movement of the bus bar 6 in the direction of the arrow X is restricted when it is accommodated and fixed in the bus bar fixing portion 23, and the electrical connection to the electrodes 4 and 5 (see FIG. 1). It is formed as a rotation restricting portion of the bus bar 6 with the direction of the arrow Z as the rotation axis.

  The plurality of protrusions 16 are arranged and formed so as to be located on both sides of the locked portion 15c (both sides in the bus bar longitudinal direction). Since a pair of locked portions 15 are formed, four protrusions 16 are formed. The four protrusions 16 are all formed in the same shape. The protruding portion 16 is formed in a convex shape that protrudes from the long side wall 11 in the arrow Y direction. Since the protrusions 16 are arranged on both sides of the locked part 15c as described above, the protruding parts 16 are arranged in such a state that the hooks 31 (see FIGS. 5 and 6) of the bus bar fixing part 23 to be described later are also sandwiched between the hooks. Formed.

  The protruding portion 16 is formed flush with the flat plate portion 15. The protrusion 16 is formed as a portion to be placed on a positioning portion 32 (see FIGS. 5 and 6) of the bus bar fixing portion 23 described later, that is, a placement surface 16a. The protrusion 16 is formed as a portion where the protruding tip abuts against the positioning portion 32 and the movement in the arrow Y direction is restricted, that is, the positioning abutting portion 16b. Further, the protruding portion 16 is a portion in which the inner portion abuts on a locking portion 31 (see FIGS. 5 and 6) of the bus bar fixing portion 23 described later and movement in the arrow X direction is restricted, and the arrow Z direction. This is formed as a portion where the rotational movement of the bus bar 6 is restricted, that is, the positioning contact portion 16c.

  In the present embodiment, the distance between the projecting tips of the projection 16 indicated by the dimension C in the drawing is the width of the bus bar 101 (see FIG. 11) of the conventional example, that is, the pair of long side portions 104 (see FIG. 11). It is set to be shorter than the distance. The bus bar 6 of the present embodiment is formed in a shape in which the outer portion is small and the portion that does not contribute to energization is significantly smaller than the conventional one.

  Next, the resin plate 7 will be described with reference to FIGS. 5 and 6 (refer to FIGS. 1 to 3 as necessary). 5 is a perspective view of the resin plate 7 constituting the bus bar module 1 of FIG. 1 (inside of circle, an enlarged perspective view of the bus bar fixing portion 23), and FIG. 6 is a front view of the bus bar fixing portion 23 of FIG.

  5 and 6, the resin plate 7 is injection-molded using a resin material having insulating properties. Further, the resin plate 2 is formed in a long length corresponding to the number of the batteries 3. The resin plate 7 is formed so that the plurality of bus bars 6 can be efficiently connected to the battery assembly 2.

  The resin plate 7 includes a resin plate main body 17, a central part external device mounting portion 18 that is coupled to the resin plate main body 17 via a hinge, and electric wire connection portions that are arranged and formed at both ends of the resin plate main body 17. 19 and 19, for example, are formed in the shape shown in FIGS.

  The resin plate main body 17 includes an upper-stage bus bar fixing portion group 20, a lower-stage bus bar fixing portion group 21, and a plurality of connecting portions 22 that connect these. A plurality of bus bar fixing portions 23 are formed in each of the upper bus bar fixing portion group 20 and the lower bus bar fixing portion group 21. The bus bar fixing portion 23 is formed as a portion for receiving and fixing the bus bar 6. The bus bar fixing portion 23 is formed in a substantially rectangular frame shape when viewed from the front (when viewed from the arrow Z direction). The bus bar fixing portions 23 are arranged and formed so as to be aligned in a line in the direction in which the batteries 3 are aligned (arrow X direction). By arranging the bus bar fixing portions 23 in a line, an upper bus bar fixing portion group 20 and a lower bus bar fixing portion group 21 are formed.

  The bus bar fixing portion 23 includes a bottom wall 24 whose outer shape is rectangular, a frame-shaped side wall 25 protruding from the end of the bottom wall 24 in the arrow Z direction, and a plate-side composite functional portion 26 that is a characteristic portion of the present invention. And have. The bus bar fixing portion 23 is formed in the same size as the conventional one. A pair of openings 27 are formed in the bottom wall 24. Further, a part (bridge portion 28) constituting the plate-side composite functional portion 26 is formed. The pair of openings 27 are formed as openings corresponding to the electrodes 4 and 5 (seat surface) of the battery 3. The bridge portion 28 is disposed and formed between the pair of openings 27. The bridge portion 28 is formed in a strip-like portion extending in the arrow Y direction.

  The bridge portion 28 of this embodiment is formed wider than the center receiving portion 110 (see FIG. 11) of the conventional example. Of course, it is possible to make it difficult for the bus bar 6 to swing because the bridge portion 28 is formed wide.

  The side wall 25 is formed in a rectangular frame shape. The frame size of the side wall 25 is the same as that of the conventional side wall 108 (see FIG. 11). The side wall 25 includes a pair of long side walls 29 parallel to the bus bar longitudinal direction (arrow X direction) and a pair of short side walls 30 parallel to a direction orthogonal to the bus bar longitudinal direction (arrow Y direction).

  The plate-side composite function section 26 is formed in accordance with the arrangement of the bus bar-side composite function section 14 (see FIG. 4) of the bus bar 6. That is, it is arranged and formed in accordance with the position of the central portion of the bus bar 6 (in other words, it is arranged and formed in accordance with the position of the bridge portion 28 of the bus bar fixing portion 23). The plate-side composite function portion 26 is formed on the resin plate 7 side so as to be a retaining function portion, a positioning function portion, a rotation preventing function portion, and a rocking prevention function portion. In the present embodiment, the plate-side composite functional portion 26 is composed of two types of portions, that is, a locking portion 31 and a plurality of positioning portions 32. It is formed as a part having four functions.

  The locking portion 31 is formed as a portion that restricts the removal of the bus bar 6, that is, as a retaining function portion. The locking portion 31 includes a bridge portion 28, a pair of locking arms 31a, and a pair of arm base portions 31b. The pair of arm base portions 31 b are formed so as to protrude from the center inside of the pair of long side walls 29. The pair of locking arms 31a are formed so as to be integrated with the pair of arm base portions 31b.

  The pair of locking arms 31a is formed in a cantilevered arm shape. Further, the pair of locking arms 31 a is formed to be flexible and bendable toward the pair of long side walls 29. Such a pair of locking arms 31a has a locking claw portion (reference number omitted) at the arm tip position. The locking claw portion is formed as a hooked portion (locking portion) that sandwiches the pair of locked portions 15 c (see FIG. 4) of the bus bar 6 between the bridge portion 28. The locking claw portion is disposed and formed at a position spaced apart from the bridge portion 28 by the thickness of the bus bar 6.

  In addition, since a pair of latching arms 31a have flexibility, there exists a concern about the movement of the arrow Y direction of the bus bar 6 which became smaller than before only with such latching arms 31a. However, if the pair of positioning portions 32 is formed so as to straddle both sides of the pair of locking arms 31a as in this embodiment, the concern is solved. Hereinafter, the pair of positioning portions 32 will be described.

  The pair of positioning portions 32 are arranged and formed so as to straddle both sides of the pair of locking arms 31a as described above (since they are arranged to straddle both sides of the pair of locking arms 31a, there is a pair from here. One of the positioning portions 32 will be described). The positioning portion 32 has a pair of positioning wall portions 32a disposed on both sides of the arm base portion 31b and a pair of positioning convex portions 32b.

  As described above, the pair of positioning wall portions 32a are disposed and formed on both sides of the arm base portion 31b, and are also formed so as to protrude from the center inside of the pair of long side walls 29. The arm base portion 31b and the pair of positioning wall portions 32a are formed in a U-shaped frame shape. The pair of positioning wall portions 32 a has a positioning contact surface 32 c with which the positioning contact portion 16 c of the protrusion 16 of the bus bar 6 contacts. The positioning contact surface 32c is formed as a part that restricts the movement of the bus bar 6 in the arrow X direction and a part that restricts the rotational movement of the bus bar 6 with the arrow Z direction as the rotation axis.

  The pair of positioning protrusions 32 b are arranged and formed so as to be continuous with the pair of positioning walls 32 a and are also formed so as to protrude from the center inside of the pair of long side walls 29. The pair of positioning projections 32b are convex portions, and a tapered guide surface 32d for guiding the projection 16 of the bus bar 6 and a positioning contact surface 32e on which the positioning contact 16b of the projection 16 abuts. And have. The positioning contact surface 32e is formed as a part that restricts the movement of the bus bar 6 in the arrow Y direction and a part that restricts the rotational movement of the bus bar 6 with the arrow Z direction as the rotation axis.

  Subsequently, the housing and fixing of the bus bar 6 to the bus bar fixing portion 23 will be described with reference to FIGS. 7 to 10 (refer to FIGS. 4 to 6 as necessary). 7 is a perspective view of the state in which the bus bar 6 is housed and fixed in the bus bar fixing portion 23 (an enlarged perspective view in a circle), FIG. 8 is a front view of the state in which the bus bar 6 is housed and fixed in the bus bar fixing portion 23, and FIG. 8 is a cross-sectional view taken along line AA in FIG. 8, and FIG. 10 is a cross-sectional view taken along line BB in FIG.

  7 to 10, in the process of being accommodated in the bus bar fixing portion 23, the four protrusion portions 16 pass next to the pair of positioning wall portions 32 a. At this time, the movement in the arrow X direction is restricted by the configuration and structure of the bus bar 6 and the bus bar fixing portion 23. If there is a misalignment in the arrow Y direction, it is corrected by the guide surface 32d.

  When the locked portion 15c bends the locking arm 31a and gets over the locking claw portion, the bus bar 6 is mounted on the bridge portion 28 via the mounting surface 15b. Moreover, the to-be-latched part 15c is hooked on the latching claw part of the latching arm 31a, and the bus bar 6 is latched. When locked to the locking arm 31a, the bus bar 6 is restricted from moving in the arrow Z direction. As described above, the bus bar 6 is accommodated and fixed in the bus bar fixing portion 23.

  The bus bar 6 accommodated and fixed in the bus bar fixing portion 23 is in a state where movement in the directions of the arrows X and Y is restricted. In addition, the rotational movement with the arrow Z direction as the rotation axis is restricted. The bus bar 6 is placed on the bridge portion 28 and locked to the locking arm 31a. Furthermore, since the protrusion 16 is engaged with the positioning portion 32, the pair of short side portions 12 are in the direction of the arrow Z. It will be in the state accommodated and fixed to the bus-bar fixing | fixed part 23, without rocking | fluctuating.

  As described above with reference to FIGS. 1 to 10, the retaining function portion, the positioning function portion, the rotation preventing function portion, and the swing preventing function portion are arranged in accordance with the portion that contributes to energization of the bus bar 6. Because of the centralized arrangement, the structure of the portion that does not contribute to energization can be simplified as compared with the conventional example. Therefore, according to the present invention, there is an effect that it is possible to reduce the useless portion while reliably preventing the bus bar 6 from being detached, positioned, prevented from rotating, and prevented from swinging. In addition, according to the present invention, there is an effect that the defective product rate can be reduced along with the simplification, and the bus bar 6 can be reduced in size.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Bus bar module, 2 ... Battery assembly, 3 ... Battery, 4, 5 ... Electrode, 6 ... Bus bar, 7 ... Resin plate, 8 ... External apparatus attachment means, 9 ... Electric wire connection means, 10 ... Battery connection hole (battery 11) long side part, 12 ... short side part, 13 ... cut-off part, 14 ... bus bar side composite function part (composite function part), 15 ... flat plate part, 15a ... energization contributing part, 15b ... placed Surface, 15c: locked portion, 16: protrusion, 16a: mounted surface, 16b, 16c: positioning contact portion, 17: resin plate body, 18: external device mounting portion, 19: electric wire connecting portion, 20 ... upper side bus bar fixing part group, 21 ... lower side bus bar fixing part group, 22 ... connecting part, 23 ... bus bar fixing part, 24 ... bottom wall, 25 ... side wall, 26 ... plate side composite function part (composite function part) ), 7 ... Opening part, 28 ... Bridge part, 29 ... Long side wall, 30 ... Short side wall, 31 ... Locking part, 31a ... Locking arm, 31b ... Arm base part, 32 ... Positioning part, 32a ... Positioning wall part, 32b ... Positioning convex part, 32c, 32e ... Positioning contact surface, 32d ... Guide surface

Claims (3)

A plurality of bus bars connecting in series the adjacent batteries of a battery assembly including a plurality of batteries; and a resin plate having a plurality of bus bar fixing portions for receiving and fixing the bus bars, the bus bars being spaced apart from each other. In a bus bar module having a pair of battery connection parts formed and formed,
The bus bar fixing part and the bus bar each have a composite function part that serves as at least a retaining function part and a positioning function part of the bus bar with respect to the bus bar fixing part, and the composite function part is located at an intermediate position between the pair of battery connection parts. A bus bar module characterized by being formed according to the above. The busbar module according to claim 1, wherein
The bus bar module, wherein the composite function part is formed so as to be a function to prevent the bus bar from rotating relative to the bus bar fixing part. The bus bar module according to claim 2,
The bus bar module, wherein the composite function part is formed so as to be a function part for preventing the bus bar from swinging with respect to the bus bar fixing part.

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