JP6062213B2 - Bus bar module and power supply - Google Patents

Description

  The present invention relates to a bus bar module and a power supply device, and more particularly to a bus bar module for connecting a plurality of batteries in series and a power supply device having 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 the power supply device as a drive source of the electric motor. In this power supply device, a pair of battery connection plates as described in Patent Document 1 is used.

  The battery connection plate 101 shown in FIG. 6 is attached to a battery assembly (not shown) formed by alternately stacking batteries (square batteries) having a positive electrode at one end and a negative electrode at the other end in opposite directions. Thus, the stacked batteries are connected in series. Each battery connection plate 101 includes a resin plate 106 that is integrally molded with a molding die, a power terminal 105 that is fitted in a first housing 107 located at one end of the resin plate 106, and a resin plate 106. A plurality of two-hole bus bars 103 that are fitted in a plurality of second accommodating portions 108 located on the end side and that connect a plurality of batteries in series, and a voltage detection that is connected to the bus bars 103 so as to detect a voltage. And a terminal for use (not shown). The 1st accommodating part 107 and the several 2nd accommodating part 108 are connected along the overlap direction (arrow Y) of a some battery.

  The resin plate 106 has a first housing portion 107 and a plurality of second housing portions 108 that are linearly connected to each other, and a plurality of signal lines (not shown) connected to a plurality of voltage detection terminals indicated by an arrow Y. A hook-shaped routing groove 109 that is routed along, a plurality of groove covers 110 that cover predetermined positions in the opening of the routing groove 109, and a power line (not shown) connected to the power terminal 105 are indicated by arrows Y And a hook 111 for holding the power supply line so as to be routed along. The groove cover 110 is connected to the opening end of the routing groove 109 via a hinge 112 so as to be rotatable by 180 degrees. The groove cover 110 is provided so as to be freely displaceable between an open position that exposes the opening of the routing groove 109 and a closed position that is rotated 180 degrees from the open position to close the opening of the routing groove 109. When the resin plate 106 is molded, the resin plate 106 is located at an open position that does not cover the opening of the routing groove 109. Further, the groove cover 110 is provided with a plurality of lightening portions 110a for reducing the resin material.

JP 2004-98295 A

  However, in the above-described conventional battery connection plate 101, the resin plate 106 has a plurality of groove covers 110 in the open position at the time of molding, and overlaps the position where the hook 111 is formed in a plan view. The groove cover 110 could not be formed. For this reason, the groove cover 110 cannot be formed so as to cover the entire opening of the routing groove 109, and the signal line cannot be properly protected in a portion where the groove cover 110 is not formed. was there.

  An object of this invention is to provide the bus bar module and power supply device which can protect appropriately the electric wire routed in the routing part.

The present invention according to claim 1 is a plurality of bus bars for connecting a plurality of batteries in series by connecting electrodes of adjacent batteries among a plurality of batteries arranged so that each electrode is arranged in a straight line. A voltage detection terminal connected to each bus bar; a power supply terminal connected to a load and connected to a battery electrode located at an end of the plurality of batteries; the plurality of bus bars; A bus bar module including a plurality of voltage detection terminals and a case for accommodating the power supply terminals, wherein the case is provided along the arrangement direction, and each of the bus bars and the voltage detection are provided. A plurality of housing portions for housing the terminals, and a wiring portion provided in parallel with the plurality of housing portions and for routing the first electric wires connected to the voltage detection terminals along the arrangement direction; ,
A plurality of covers that cover a predetermined range of the openings of the routing portion and a gap between a pair of covers that are spaced apart from each other among the plurality of covers and are arranged in parallel in the plurality of receiving portions An electric wire holding portion that holds the second electric wire connected to the power supply terminal, and a protective cover that is provided in the gap and covers the opening of the routing portion, the protective cover comprising: A bus bar module characterized in that it is connected to one cover adjacent to each other with a gap between the pair of covers via a hinge, and the protective cover and the hinge are integrally molded with the pair of covers. is there.

  According to a second aspect of the present invention, in the first aspect of the present invention, the other cover adjacent to the one cover across the gap is provided with a lightening portion, and the protective cover includes In addition, a locking portion that is locked to the lightening portion is provided.

  According to a third aspect of the present invention, there is provided a battery assembly including a plurality of batteries in which positive and negative electrodes are alternately stacked in opposite directions, and the bus bar module according to the first or second aspect. It is the power supply device provided with.

  According to the first and third aspects of the present invention, the bus bar module has a case in which the case is provided along the arrangement direction, and each of the bus bars and the voltage detection terminals are accommodated, A wiring portion provided in parallel with the housing portion and configured to route the first electric wire connected to the voltage detection terminal along the arrangement direction; and a plurality of covers covering a predetermined range of the openings of the wiring portion; Among the plurality of covers, the second electric wire is provided in a gap between a pair of adjacent covers spaced apart from each other, and is provided in parallel with the plurality of accommodating portions to hold the second electric wire connected to the power supply terminal. An electric wire holding part and a protective cover provided in the gap and covering the opening of the routing part, and the protective cover is connected to one adjacent cover with a gap between the pair of covers via a hinge Because it is provided, the case is molded by resin integral molding While the protective cover is, since close the gap between the pair of cover covers the opening of the installation part, it is possible to prevent damage and short circuit the first wire. That is, the 1st electric wire routed in the routing part can be protected appropriately.

  According to the second aspect of the present invention, in one cover, the other cover adjacent to the gap is provided with a lightening portion, and the protective cover has a locking portion that is engaged with the lightening portion. Therefore, it is possible to lock the protective cover to another cover by diverting the conventional configuration without newly creating a lock receiving portion for locking to the lock portion of the protective cover. It is possible to minimize the change of the mold for molding the case, and to suppress an increase in cost.

It is a disassembled perspective view of the power supply device concerning one embodiment of this invention. It is a top view which shows the bus bar module which comprises the said power supply device. It is a top view which shows the assembly operation | work of the said bus bar module. It is a top view which shows a mode that the cover which comprises the said bus bar module is rotated by a wiring part. It is a top view which shows the assembly operation of the said bus bar module, (A) is a top view which shows the whole bus bar module, (B) is an enlarged view which looked at a part of (A) from a different angle, (C) is a figure which shows the state which the protective cover closed, (D) is an enlarged view of (C). It is a top view which shows the conventional bus bar module.

  A bus bar module and a power supply device according to an embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the bus bar module 1 of the present invention is attached to the side surface of the battery assembly 2 shown in FIG. That is, the power supply device 10 includes a battery assembly 2 and a pair of bus bar modules 1 attached to both side surfaces of the battery assembly 2. The power supply device 10 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.

  As shown in FIG. 1, the battery assembly 2 includes a plurality of batteries 20 and a fixing member (not shown) that fixes the plurality of batteries 20 so as to overlap each other. Each battery 20 includes a battery main body 21 in which an electrolytic solution is filled in a box-shaped housing, and a positive electrode 22 protruding from one side surface and the other side surface of the battery main body 21 (the “electrode” in the claims). And a negative electrode 23 (corresponding to “electrode” in the claims). Each of the positive electrode 22 and the negative electrode 23 is formed in a cylindrical shape from a conductive metal, and a thread groove that is screwed into the nut 2 </ b> A is formed on the outer peripheral surface thereof.

  Further, the plurality of batteries 20 are arranged so that the positive electrodes 22 and the negative electrodes 23 are alternately arranged in a straight line along the overlapping direction of the batteries 20. 1 indicates the arrangement direction of the plurality of batteries 20 and the longitudinal direction of the bus bar module 1, and the arrow X indicates the width direction of each battery 20, that is, the width direction of the bus bar module 1. Z indicates the height direction of each battery 20, that is, the height direction of the bus bar module 1.

  The pair of bus bar modules 1 connect the plurality of batteries 20 described above in series. As shown in FIGS. 1 and 2, a plurality of batteries 20 are connected by connecting positive electrodes 22 and negative electrodes 23 of adjacent batteries 20. A plurality of bus bars 3 that connect batteries 20 in series, a plurality of voltage detection terminals 4 that are electrically connected to each bus bar 3 to detect the voltage of each battery 20, and are connected to each voltage detection terminal 4. A plurality of voltage detection lines 40 (first electric wires), a pair of power supply terminals 5 connected to electrodes of different polarities located at both ends of the plurality of batteries 20, and a pair of power supply terminals 5 are connected. A pair of power supply lines 50 (second electric wires) and a plurality of bus bars 3, a plurality of voltage detection terminals 4, a pair of power supply terminals 5, a plurality of voltage detection lines 40, and a pair of power supply lines 50. The case 6 is provided. In FIG. 1, the power supply terminal 5 and the voltage detection line 40 are omitted.

  Each of the plurality of bus bars 3 is obtained by pressing a metal plate or the like, and as shown in FIG. 3, the positive electrode 22 and the negative electrode 23 of electrodes adjacent to each other are inserted into the plate-like metal plate. In this configuration, a pair of through holes 3a are formed. The bus bar 3 is fixed and electrically connected to the positive electrode 22 and the negative electrode 23 by screwing the nut 2A into the positive electrode 22 and the negative electrode 23 inserted into the pair of through holes 3a.

  Each of the plurality of voltage detection terminals 4 is obtained by pressing a metal plate or the like. As shown in FIG. 3, a rectangular plate-like terminal body 41 and an outer edge of the terminal body 41 are provided. A rectangular plate-like bottom plate 42 that is formed continuously and extending along the arrow Z direction, and is formed upright from both ends in the width direction (arrow X direction) of the bottom plate 42. And a pair of caulking pieces 43 for caulking the core wire of the voltage detection line 40. The terminal body 41 is formed with a through hole 4a at the center thereof. Each voltage detection terminal 4 is electrically connected to each bus bar 3 while either one of the positive electrode 22 or the negative electrode 23 of the battery 20 is inserted into the through hole 4a and overlapped with each bus bar 3. The caulking piece 43 caulks the core of the voltage detection line 40 and is electrically connected to the voltage detection line 40.

  The pair of power supply terminals 5 are located at both ends of the plurality of batteries 20 and are connected to electrodes having different polarities and to a load. Each power supply terminal 5 is obtained by pressing a metal plate or the like. As shown in FIGS. 1 and 2, a rectangular plate-shaped terminal main body 51 and an outer edge of the terminal main body 51 are continuous. And a rectangular bottom plate 52 whose longitudinal direction extends along the arrow Y direction, and is formed upright from both ends in the width direction (arrow Z direction) of the bottom plate 52. And a pair of caulking pieces 53 for caulking the core wire of the power line 50. The terminal body 51 is formed with a through hole 5a at one end in the longitudinal direction (arrow Z direction) and a caulking piece 53 at the other end. The power terminal 5 is inserted into the through hole 5a with an electrode positioned at an end of the plurality of batteries 20, and is electrically connected to electrodes of different polarities. 50 core wires are caulked to be electrically connected to the power line 50.

  As shown in FIG. 3, the case 6 is formed in a substantially rectangular shape that is substantially equal to the upper surface of the battery assembly 2, and overlaps the upper surface of the battery assembly 2. The case 6 includes a plurality of bus bar accommodating portions 7 (accommodating portions) that accommodate the bus bars 3 and the voltage detection terminals 4 superimposed on the bus bars 3 and are connected in a straight line along the arrow Y direction. One terminal accommodating portion 8 that accommodates each voltage detection terminal 4 and power supply terminal 5 and is provided adjacent to an end in the arrow Y direction of the plurality of bus bar accommodating portions 7, and a plurality of bus bar accommodating portions 7. A hook-shaped routing portion 9 that is provided in parallel in the alignment direction (arrow Y direction) and connects the voltage detection line 40 connected to the voltage detection terminal 4 in the arrow Y direction; A pair of covers 9A and 9B that cover a predetermined range of the opening, and a wire holder that is provided in a gap between the pair of covers 9A and 9B and that routes the power line 50 connected to the power terminal 5 in the arrow Y direction. Opening of the routing portion 9 provided in the gap between the portion 11 and the pair of covers 9A, 9B And the protective cover 17 which covers (shown in FIG. 1), is configured to include a. That is, the entire opening of the routing portion 9 is covered with the pair of covers 9 </ b> A and 9 </ b> B and the protective cover 17.

  As shown in FIG. 3, the case 6 is provided with a plurality of communication portions 28 that connect the plurality of bus bar accommodating portions 7 and the routing portions 9 and communicate the bus bar accommodating portions 7 with the routing portions 9. It has been. Each communication part 28 is formed in a bowl shape, and causes the cabling part 9 to lead out the voltage detection line 40 from each bus bar accommodating part 7. The case 6 is provided with a plurality of bus bar accommodating portions 7 and terminal accommodating portions 8 on the upper side of the routing portion 9 in the arrow Z direction (upper side in FIG. 3). The electric wire holding part 11 is provided on the side (the lower side in FIG. 3), and the wiring part 9 is provided between the plurality of bus bar accommodating parts 7 and the terminal accommodating part 8 and the electric wire holding part 11. In addition, a plurality of bus bar accommodating portions 7, one terminal accommodating portion 8, a routing portion 9, a pair of covers 9A and 9B, a wire holding portion 11, a protective cover 17, and a plurality of communicating portions 28 constituting the case 6, It is integrally molded with a synthetic resin.

  As shown in FIG. 1, the plurality of bus bar accommodating portions 7 are each formed in a box shape having a rectangular plate-like bottom wall 71 for positioning the bus bar 3 on the surface. The bottom wall 71 is formed with a pair of through holes 7 a into which the positive electrode 22 and the negative electrode 23 of the battery 20 are inserted.

  As shown in FIG. 3, the terminal accommodating portion 8 is formed in a bowl shape having a rectangular plate-like bottom wall 81 that positions the voltage detection terminal 4 and the power supply terminal 5 that are overlapped with each other on the surface. The bottom wall 81 is formed with one through hole (not shown) into which the positive electrode 22 or the negative electrode 23 of the battery 20 is inserted. The terminal accommodating portion 8 is arranged so that the lower end portion in the arrow Z direction leads out the voltage detection line 40 connected to the voltage detecting terminal 4 accommodated in the terminal accommodating portion 8 to the routing portion 9. The lower end portion in the arrow Z direction is provided so as to communicate with the cable portion 9 and is led out so as to route the power supply line 50 connected to the power supply terminal 5 along the arrow Y direction.

  As shown in FIGS. 3 and 4, the routing portion 9 includes a rectangular plate-shaped bottom wall 91 that positions the voltage detection line 40 connected to the voltage detection terminal 4 on the surface, and the width direction of the bottom wall 91. It has both side walls 92A and 92B erected from both ends in the direction of arrow Z, and is formed in a bowl shape. A plurality of portions of the bottom wall 91 are cut out. The first side wall 92A on the upper side (communication portion 28 side) of the side walls 92A, 92B is provided with a first lock receiving portion 96 that engages with the first lock portion 95 provided on each cover 9A, 9B. ing. The first lock receiving portion 96 is provided between the plurality of communication portions 28 (that is, a position where the communication portion 28 is not provided), and is provided at the distal end portion of the first side wall 92A.

  As shown in FIGS. 3 and 4, the pair of covers 9 </ b> A and 9 </ b> B are arranged at intervals in the arrow Y direction so as to cover a predetermined range in the opening of the routing portion 9. Each cover 9 </ b> A, 9 </ b> B is formed in a plate shape whose width dimension is substantially equal to the dimension between both side walls 92 </ b> A, 92 </ b> B (arrow Z direction) of the routing portion 9, and through the first hinge 90. And is connected to the routing portion 9 so as to be rotatable by 180 degrees. A first hinge 90 is continuously provided on one edge of each cover 9A, 9B on the wiring section 9 side (that is, on the arrow Z direction side), and a first hinge 90 is provided on the other edge. A first lock portion 95 that is engaged with the one lock receiving portion 96 is provided. Further, each cover 9A, 9B is formed with a plurality of thinned portions 9a having a rectangular shape in plan view.

  A plurality of first hinges 90 are provided at positions corresponding to the first lock portion 95 and the first lock receiving portion 96 and are continuously provided at the tip of the second side wall 92B of the routing portion 9. . Each first hinge 90 is connected to a pair of covers 9A and 9B so as to be rotatable by 180 degrees about the arrow Y direction as a rotation center axis, and each cover 9A and 9B is closed to cover the opening of the routing unit 9 And an opening position where the opening of the routing portion 9 is exposed. When the case 6 is molded by resin integral molding (that is, immediately after being molded), the pair of covers 9A and 9B and the cover portion 13 of the wire holding portion 11 are in the open position shown in FIGS. Is positioned.

  As shown in FIG. 3, the electric wire holding part 11 includes a hook-like holding part main body 12 that hooks and holds the power line 50 arranged in the arrow Y direction, and a covering part 13 that covers the opening of the holding part main body 12. And a second hinge 14 that rotatably connects the cover 13 to the holding body 12. The holding portion main body 12 has an opening end on the upper side in the arrow Z direction connected to the second side wall 92B of the routing portion 9 and covers the opening end on the upper side of the holding portion main body 12. A second lock receiving portion 16 that is engaged with a second lock portion 15 provided in the portion 13 is provided.

  The protective cover 17 is formed in a rectangular plate shape so as to cover a gap between the adjacent covers 9A and 9B with a space therebetween. The protective cover 17 is connected to one cover 9A via a third hinge 19 (hinge in claims). As shown in FIGS. 5 (A) and 5 (B), the protective cover 17 is attached to the edge of the cover body 24 connected to one cover 9A via the third hinge 19 and the lightening portion 9a of the other cover 9B. A locking arm 25 (locking portion) for locking. The cover body 24 is formed such that its longitudinal dimension (in the arrow Y direction) is larger than the dimension of the gap between the adjacent covers 9A and 9B, and its width dimension (in the arrow Z direction) is substantially equal to the width dimension of the covers 9A and 9B. In addition to being formed, a third hinge 19 is provided at one end in the longitudinal direction, and a locking arm 25 is provided at the other end.

  The third hinge 19 is formed in a thin rod shape so as to bend easily, and one end in the longitudinal direction thereof is continuously provided on one cover 9A, and the other end is continuously provided on the protective cover 17. Is provided. As shown in FIG. 5B, the third hinge 19 is connected so that the protective cover 17 can rotate 90 degrees with respect to the cover 9A with the arrow Z direction as the rotation center axis. 17 is a closed position that closes the gap between the pair of covers 9A and 9B and closes the opening of the routing portion 9, and an open position that exposes the gap between the pair of covers 9A and 9B and exposes the opening of the routing portion 9 Displace to

  Such a protective cover 17 is positioned at the open position when the case 6 is molded by resin integral molding (that is, immediately after molding). That is, the protective cover 17 when the case 6 is molded by resin integral molding is provided in a direction (arrow X direction) orthogonal to the direction in which the covers 9A and 9B are arranged (arrow Y direction).

  As shown in FIGS. 5C and 5D, the locking arm 25 includes an arm 26 provided at the other end of the cover body 24 and a wall of the other cover 9B provided at the tip of the arm 26. And a locking claw 27 that locks to the edge of the extraction portion 9a. The arm 26 is formed so as to protrude from the cover main body 24 and has a longitudinal dimension slightly larger than the plate thickness of the covers 9A and 9B.

  Next, an assembly procedure of the power supply apparatus 10 having the above configuration will be described. First, the bus bar 3, voltage detection terminal 4, power supply terminal 5, case 6 and the like are manufactured separately. Then, each bus bar 3 is fitted into each bus bar accommodating portion 7 of the case 6, and the voltage detection terminal 4 is overlaid on the bus bar 3. The pair of through holes provided in the bus bar housing portion 7 and the pair of through holes 3a provided in the bus bar 3 overlap, and one of the pair of through holes 3a of the bus bar housing portion 7 and the bus bar 3 is for voltage detection. The through holes 4a provided in the terminals 4 overlap. And each voltage detection line 40 is routed in the routing part 9 and the communication part 28, and this voltage detection line 40 and the voltage detection terminal 4 are electrically connected.

  Then, the pair of covers 9 </ b> A and 9 </ b> B is rotated 180 degrees so as to cover the opening of the routing portion 9 and positioned at the closed position, and the first lock receiving portion 96 is locked by the first lock portion 95. The protective cover 17 is rotated so as to cover the opening of the routing portion 9, the locking arm 25 is brought close to the other cover 9 </ b> B, and is brought into contact with the edge of the lightening portion 9 a of the other cover 9 </ b> B. Further, the latching arm 25 is pressed against the cover 9B, the arm 26 is elastically deformed, and the latching claw 27 enters into the lightening portion 9a. The arm 26 is elastically restored, and the locking claw 27 is locked to the edge of the thinned portion 9a. Thus, the protective cover 17 is fixed (maintained) in a state where it covers the opening of the routing portion 9 and is positioned at the closed position that closes the gap between the pair of covers 9A and 9B.

  The voltage detection terminal 4 is fitted into the terminal accommodating portion 8, and the power supply terminal 5 is overlaid on the voltage detection terminal 4. The through hole provided in the terminal accommodating portion 8 and the through hole 4 a of the voltage detection terminal 4 overlap, and the through hole 5 a provided in the power supply terminal 5 overlaps. Then, the voltage detection line 40 is routed in the routing unit 9, and the voltage detection line 40 and the voltage detection terminal 4 are electrically connected. The power supply line 50 is accommodated in the holding part main body 12 of the electric wire holding part 11 and wired in the arrow Y direction, and the power supply line 50 and the power supply terminal 5 are electrically connected. Finally, the cover portion 13 of the electric wire holding portion 11 is rotated and positioned at the closed position, and the second lock receiving portion 16 is locked by the second lock portion 15. Thus, the assembly of the bus bar module 1 is completed.

  The pair of bus bar modules 1 assembled in the above-described procedure are stacked on both side surfaces of the battery assembly 2, and the through hole 7a of the case 6, the through hole 3a of the bus bar 3, and the through hole 4a of the voltage detection terminal 4 are inserted. A nut is screwed into the positive electrode 22 and the negative electrode 23, and the electrode of the battery 20 and the power supply line 50 and the electrode of the battery 20 and the voltage detection line 40 are electrically connected to assemble the power supply device 10. Complete.

  According to such a bus bar module 1 and the power supply device 10, the case 6 is provided along the arrangement direction Y, and a plurality of bus bar accommodating portions 7 that accommodate the bus bars 3 and the voltage detection terminals 4. (Housing part) and a hook-like shape that is provided in parallel with the plurality of bus bar housing parts 7 and that routes the voltage detection line 40 (first electric wire) connected to the voltage detection terminal 4 along the arrangement direction Y. Are provided between the pair of covers 9A and 9B and the pair of covers 9A and 9B, and in parallel with the plurality of bus bar accommodating portions 7. Protection provided to cover the opening of the wiring portion 9 provided in the gap between the pair of covers 9A and 9B and the wire holding portion 11 that holds the power supply line 50 (second electric wire) connected to the power supply terminal 5 Cover 17, and protective cover 17 includes a pair of covers 9 </ b> A. Since the cover 9A is connected to the adjacent cover 9A via the hinge 18 (third hinge) with a gap between the cover 9B interposed therebetween, the protective cover 17 covers the opening of the routing portion 9 and a pair of covers 9A, Since the gap between 9B is closed, the voltage detection line 40 can be prevented from being damaged or short-circuited while the case 6 is molded by resin integral molding. That is, the voltage detection line 40 routed in the routing unit 9 can be appropriately protected.

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

DESCRIPTION OF SYMBOLS 1 Bus bar module 10 Power supply device 2 Battery assembly 3 Bus bar 4 Voltage detection terminal 5 Power supply terminal 6 Case 7 Bus bar accommodating part (accommodating part)
9 Routing parts 9A, 9B A pair of covers 9a Meat removal part 11 Electric wire holding part 17 Protective cover 18 Third hinge (hinge)
25 Locking arm (locking part)

Claims (3)

A plurality of bus bars connecting the plurality of batteries in series by connecting the electrodes of adjacent batteries among the plurality of batteries arranged so that each electrode is arranged in a straight line;
A voltage detection terminal connected to each bus bar;
A power supply terminal connected to a load and connected to an electrode of a battery located at an end of the plurality of batteries;
A bus bar module comprising a case for housing the plurality of bus bars, the plurality of voltage detection terminals, and the power supply terminals,
The case is
A plurality of accommodating portions that are provided along the arrangement direction and accommodate the bus bars and the voltage detection terminals;
A wiring portion that is provided side by side in the plurality of housing portions, and that routes the first electric wires connected to the voltage detection terminals along the arrangement direction;
A plurality of covers covering a predetermined range of the openings of the routing portion;
Among the plurality of covers, a second electric wire that is provided in a gap between a pair of adjacent covers spaced apart from each other and that is provided in parallel with the plurality of accommodating portions and connected to the power supply terminal. An electric wire holding part to hold;
A protective cover provided in the gap and covering the opening of the routing portion,
The protective cover is connected to one adjacent cover with a gap between the pair of covers via a hinge, and the protective cover and the hinge are integrally molded with the pair of covers. And bus bar module. The other cover adjacent to the one cover across the gap is provided with a lightening portion,
The bus bar module according to claim 1, wherein the protective cover is provided with a locking portion that locks the lightening portion. A battery assembly composed of a plurality of batteries in which positive and negative electrodes are alternately stacked in opposite directions;
A power supply apparatus comprising: the bus bar module according to claim 1.

Images