JP2012243649A - Battery wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery wiring module the efficiency of attachment work of which to a single battery group is enhanced.SOLUTION: The battery wiring module 14 includes a plurality of bus bars 17 for interconnecting the electrode terminals 11 of single batteries 12, and a synthetic resin protector 61 holding the plurality of bus bars 17. The resin protector 61 is deflection deformable within a range of deflection allowance which is set in a direction intersecting the arrangement direction of the single batteries 12. A deflection restriction part 75 for restricting the deflection deformation of the resin protector 61 in at least one direction intersecting the arrangement direction of the single batteries 12 is formed in the resin protector 61.

Description

The present invention relates to a battery wiring module.

  Conventionally, as a battery wiring module attached to a cell group in which a plurality of cells are arranged, the one described in Patent Document 1 is known. In this battery wiring module, a plurality of bus bars that connect the electrode terminals of the unit cells are held on a substrate portion made of synthetic resin. A battery module in which a battery wiring module is attached to a single battery group is mounted on a vehicle such as an electric vehicle or a hybrid vehicle and used as a driving source of the vehicle.

Japanese Patent No. 3707595

  According to the above configuration, since the synthetic resin substrate portion is relatively rigid, the battery wiring module is attached to the unit cell group, so that it is difficult to bend in the direction intersecting with the arrangement direction of the plurality of unit cells. ing. For this reason, for example, the connection work between the electrode terminal and the bus bar cannot be performed for each bus bar, and it is necessary to assemble the entire battery wiring module into the unit cell group at the same time. In other words, if the pitch of the plurality of electrode terminals is shifted even at one place, the battery wiring module may not be attached to the unit cell group.

  In order to solve the above problem, it is conceivable to make the battery wiring module flexible as a whole by making the substrate portion flexible. Thereby, it was expected that the connection work between the electrode terminal and the bus bar was performed for each bus bar. Thereby, it was expected to improve the efficiency of the connection work between the single cell group and the battery wiring module.

  However, if the battery wiring module is configured to be able to bend, when an operator lifts the battery wiring module from a predetermined place and carries it to the place where the unit cell group is assembled, an inertial force is applied to the battery wiring module. There is a concern that the battery wiring module may bend in a direction unintended by the operator due to application of centrifugal force. Then, there is a concern that the battery wiring module may collide with foreign matter.

  In order to avoid the above problem, if the battery wiring module is handled slowly and carefully at the time of carrying the battery wiring module, there is a concern that the efficiency of the connection work between the unit cell group and the battery wiring module is lowered.

  This invention is completed based on the above situations, Comprising: It aims at providing the battery wiring module with which the efficiency of the assembly | attachment operation | work with a cell group was improved.

  The present invention is a battery wiring module that is attached to a unit cell group in which a plurality of unit cells each having a positive electrode electrode and a negative electrode terminal are arranged to connect the electrode terminals. And a resin protector made of synthetic resin for holding the plurality of bus bars, wherein the resin protector is bent and deformed within a range of allowable bending set in a direction intersecting with the arrangement direction of the single cells. The resin protector is formed with a bending restricting portion for restricting bending deformation of the resin protector in at least one of the directions intersecting with the arrangement direction of the unit cells.

  According to the present invention, when the battery wiring module is lifted from a predetermined placement location and carried to a place where connection work with the unit cell group is performed, inertial force or centrifugal force is applied in a direction in which the deflection direction is regulated by the deflection regulating portion. By making the force act, the battery wiring module can be prevented from being relatively bent. Thereby, it can suppress that a battery wiring module bends and deform | transforms in the direction which an operator does not intend. As a result, since the operator can handle the battery wiring module as a relatively rigid object, the efficiency of carrying the battery wiring module can be improved. Thereby, the efficiency of the work of attaching the battery wiring module to the unit cell group can be improved.

  As embodiments of the present invention, the following embodiments are preferable.

  The bend restricting portion is a minimum bend restricting portion for restricting the deformation deformation of the resin protector in the minimum bend direction in which the allowable amount of bend of the resin protector in the direction intersecting the arrangement direction of the cells is minimized, and A maximum bending restricting portion for restricting the bending deformation of the resin protector in the maximum bending direction in which the allowable bending amount of the resin protector in the direction intersecting with the arrangement direction of the cells is maximized.

  According to the above aspect, when the battery wiring module is lifted from the predetermined placement location and carried to the place where the connection operation with the unit cell group is performed, inertial force or centrifugal force acts in the minimum bending direction of the resin protector. By doing so, the battery wiring module can be prevented from being relatively bent. Thereby, it can suppress that a battery wiring module bends and deform | transforms in the direction which an operator does not intend. As a result, since the operator can handle the battery wiring module as a relatively rigid object, the efficiency of carrying the battery wiring module can be improved.

  Further, according to this aspect, in the connection work between the unit cell group and the battery wiring module, the resin protector is bent in the maximum bending direction, and the pitch deviation between the electrode terminals is adjusted individually for each bus bar. A battery wiring module can be attached to the single cell group. Thereby, the efficiency of the connection operation | work with a battery wiring module and a cell group can be improved.

  Thus, according to this aspect, the battery wiring module to the single cell group is improved by improving the efficiency of carrying work of the battery wiring module and improving the efficiency of the connection work between the battery wiring module and the single battery group. The efficiency of the mounting operation can be improved as a whole.

  The unit cell has an electrode surface on which the electrode terminals are formed, and in a state where the resin protector is attached to the electrode surface, the minimum bending direction is set to a direction from the resin protector toward the electrode surface. The maximum bending direction is preferably opposite to the minimum bending direction.

  According to the above aspect, since the direction from the resin protector toward the electrode surface is the minimum bending direction, the resin protector is restricted from being bent toward the electrode surface. Thereby, when attaching a battery wiring module to a single cell group, a resin protector bends to the electrode surface side, and it is suppressed that a resin protector and an electrode terminal collide. Thereby, in order to avoid that a resin protector and an electrode terminal collide, since it is not necessary for an operator to consider excessively, the efficiency of the attachment operation | work of the battery wiring module to a cell group can be improved. .

  Moreover, according to this aspect, the maximum bending direction is the direction opposite to the minimum bending direction. That is, the maximum bending direction is set to a direction away from the electrode surface. Thereby, when attaching a battery wiring module to a single battery group, a resin protector bends in the direction away from an electrode surface by bending a resin protector in the maximum bending direction. As a result, since the bus bar can be easily attached to the electrode terminal, the efficiency of the work of attaching the battery wiring module to the unit cell group can be improved.

  The resin protector is connected to a plurality of connection units made of synthetic resin, and the resin protector is connected to one connection unit of the plurality of connection units and another connection connected next to the one connection unit. It is preferable that the portion where the unit is connected can be bent.

  According to the above aspect, the resin protector can be easily bent and deformed by being bent at a connection portion between one connection unit and another connection unit connected next to the one connection unit. .

  The resin protector is preferably formed by connecting one connecting unit of the plurality of connecting units and another connecting unit connected next to the one connecting unit by the bus bar.

  According to said aspect, several connection units can be connected by a bus bar.

  The bus bar has an elongated shape in the connecting direction of the connecting unit, and the connecting unit holds one end of the bus bar in the connecting direction of the connecting unit from both the front and back surfaces of the bus bar. It is preferable to include a first holding portion that holds the second holding portion that holds the position different from the end portion of the bus bar held by the first holding portion from both the front and back surfaces of the bus bar.

  According to the above aspect, the bus bar is held by the connecting unit by being held by the first holding part and the second holding part.

  The first holding part includes a back side first holding part located on the back side of the bus bar, and a front side first holding part located on the front side of the bus bar, and the second holding part is provided on the bus bar. A back side second holding part located on the back side, and a front side second holding part located on the front side of the bus bar, and a surface of the back side first holding part facing the back side of the bus bar, and the back side It is preferable that the surface of the second holding portion facing the back surface of the bus bar is formed on the same virtual plane.

  According to said aspect, the back surface of a bus-bar can be aligned with this virtual plane by making the back surface of a bus bar contact | abut to a back side 1st holding part and a back side 2nd holding part.

  A first gap formed between a surface of the front-side first holding portion facing the front surface of the bus bar and a surface of the back-side first holding portion facing the back surface of the bus bar is a plate of the bus bar. It is set to be slightly larger than the thickness dimension, and is between the surface facing the surface of the bus bar in the surface side second holding part and the surface facing the back surface of the bus bar in the back side second holding part. The second gap formed in the first gap is formed wider than the first gap, and the minimum deflection regulating portion includes the front side first holding portion and the back side second holding portion, and the maximum deflection regulating portion. Is preferably composed of the back-side first holding part and the surface-side second holding part.

  According to the above aspect, the bus bar is sandwiched between the back side first holding part and the front side first holding part. The first gap formed between the back side first holding part and the front side first holding part is set to be slightly larger than the thickness of the bus bar. As a result, the bus bar is rotatable in a direction intersecting the plate surface of the bus bar with the vicinity of the end of the bus bar sandwiched between the back side first holding part and the front side first holding part as a fulcrum. The bus bar is sandwiched between the back-side second holding portion and the front-side second holding portion, so that the rotation in the direction intersecting the plate surface of the bus bar is restricted. Specifically, the rotation amount to the back side of the bus bar is regulated by the front side first holding part and the back side second holding part coming into contact with the bus bar, and the back side first holding part and the front side second holding part are The amount of rotation to the surface side of the bus bar is regulated by contacting the bus bar.

  And since the surface which contact | abuts the back surface of a bus bar among back side 1st holding parts and the surface which contact | abuts the back surface of a bus bar among back side 2nd holding parts are formed on the virtual same plane, front side 1st The amount of rotation of the bus bar toward the back side becomes relatively small when the one holding part and the back side second holding part come into contact with the bus bar. Thereby, in a state where the connecting unit is connected via the bus bar, the allowable amount of bending when the resin protector is bent and deformed toward the back side of the bus bar can be made relatively small.

  Since the second gap is formed wider than the first gap, the amount of rotation to the front side of the bus bar is relatively large when the back side first holding part and the front side second holding part come into contact with the bus bar. It becomes. Thereby, in a state where the connecting unit is connected via the bus bar, the allowable amount of bending when the resin protector is bent and deformed toward the surface side of the bus bar can be made relatively large.

  The back side first holding part and the front side first holding part are formed offset with respect to a direction intersecting the plate surface of the bus bar, and the back side second holding part and the front side second holding part are It is preferable that they are formed offset with respect to the direction intersecting the plate surface of the bus bar.

  According to the above aspect, when the connecting unit made of synthetic resin is injection-molded, the molten synthetic resin is injected into a pair of molds that open in a direction intersecting the plate surface of the bus bar and solidified. Thus, the first holding part and the second holding part can be formed. Thereby, since it is not necessary to use a comparatively expensive slide type | mold, the manufacturing cost of a battery wiring module can be reduced.

  A bus bar insertion hole into which the bus bar is inserted is formed in the side wall of the connection unit so as to penetrate the side wall of the connection unit, and a hole edge portion of the bus bar insertion hole serves as the second holding portion. preferable.

  According to said aspect, since the hole edge part of a bus-bar insertion hole can be made into a 2nd holding part, compared with the case where a 2nd holding part is formed separately, a connection unit can be reduced in size.

  ADVANTAGE OF THE INVENTION According to this invention, the efficiency of the assembly | attachment operation | work of a battery wiring module and a single battery group can be improved.

The perspective view which shows the battery module formed by attaching the battery wiring module which concerns on one Embodiment of this invention to a cell group. Plan view showing the battery module The perspective view which shows a connection unit Plan view showing the connection unit Side view showing the connecting unit Rear view showing connecting unit The top view which shows the engagement structure of a connection unit and a bus-bar BB sectional view in FIG. Front view showing the engagement structure between the connecting unit and the bus bar CC sectional view in FIG. The perspective view which shows the assembly | attachment process of a battery wiring module Partially enlarged perspective view in FIG. The perspective view which shows the assembly | attachment process of a battery wiring module The perspective view which shows the assembly | attachment process of a battery wiring module AA line sectional view in FIG. Front view showing the battery wiring module Sectional drawing which shows the state which the bus-bar has contact | abutted with the minimum bending control part Front view showing a state in which the battery wiring module is bent in the minimum bending direction Sectional drawing which shows the state which the bus-bar contact | abuts with the largest bending | flexion control part. Front view showing a state in which the battery wiring module is bent in the maximum bending direction Front view showing a state in which a battery wiring module is attached to a single cell group

<Embodiment>
An embodiment in which the present invention is applied to a battery module 10 will be described with reference to FIGS. The battery module 10 according to the present embodiment is mounted on a vehicle (not shown) such as an electric vehicle or a hybrid vehicle, and is used as a power source for driving the vehicle. The battery module 10 includes a unit cell group 13 in which a plurality of unit cells 12 including electrode terminals 11 are arranged side by side. A plurality of electrode terminals 11 are electrically connected by a battery wiring module 14.

  In the following description, the X side of the arrow OX in FIG. 1 is the right side, and the O side is the left side. Moreover, let the Y side of the arrow OY in FIG. 1 be back, and let O side be the front. Further, the Z side of the arrow OZ in FIG. 1 is the upper side, and the O side is the lower side.

  Moreover, in the following description, about the some same member, a code | symbol may be attached | subjected to one member and a code | symbol may be abbreviate | omitted about another member.

(Single cell 12)
The unit cell 12 has a flat, substantially rectangular parallelepiped shape. A power generation element (not shown) is accommodated inside the unit cell 12. A pair of electrode terminals 11, 11 are formed on the upper surface of the unit cell 12 so as to protrude upward at positions near both ends in the front-rear direction. The upper surface of the unit cell 12 is an electrode surface 60. One of the electrode terminals 11 is a positive terminal, and the other is a negative terminal. The electrode terminal 11 constituting the positive electrode terminal and the electrode terminal 11 constituting the negative electrode terminal have the same shape and the same size. The electrode terminal 11 includes a metal terminal block (not shown) and an electrode post 51 protruding upward from the terminal block. A thread is formed on the outer surface of the electrode post 51. The unit cells 12 are arranged so that the adjacent electrode terminals 11 have different polarities. The plurality of unit cells 12 are arranged in the left-right direction to form a unit cell group 13.

(Battery wiring module 14)
On the upper surface of the unit cell group 13, the battery wiring module 14 connected to the plurality of electrode terminals 11 arranged on the rear side of the unit cell group 13 and the plurality of electrode terminals 11 arranged on the front side of the unit cell group 13. And a battery wiring module 14 connected to the. A plurality of electrode terminals 11 are electrically connected by a battery wiring module 14.

  The battery wiring module 14 is made of a metal that connects the electrode terminal 11 formed in one unit cell 12 and the electrode terminal 11 formed in another unit cell 12 positioned next to the one unit cell 12. And a resin protector 61 made of synthetic resin on which the plurality of bus bars 17 are held.

(Bus bar 17)
As shown in FIG. 7, the bus bar 17 is formed by pressing a metal plate material made of copper, copper alloy, SUS, aluminum or the like into a predetermined shape. The bus bar 17 has an elongated shape in the left-right direction when viewed from above. A metal such as tin or nickel may be plated on the surface of the bus bar 17. A pair of terminal through holes 18 and 18 through which the electrode posts 51 of the electrode terminals 11 are inserted are formed in the bus bar 17 so as to penetrate the bus bar 17. In the present embodiment, both terminal through holes 18 have a circular shape when viewed from above. The terminal through hole 18 may have a circular shape when viewed from above, and the other may have an oblong shape elongated in the longitudinal direction of the bus bar 17, and both of the terminal through holes 18 may be bus bars. An ellipse shape that is elongated in the longitudinal direction of 17 may be formed.

  The nut 21 is screwed in a state where the electrode post 51 is penetrated into the terminal through hole 18 of the bus bar 17, and the bus bar 17 is sandwiched between the nut 21 and the terminal block. Are electrically connected.

(Resin protector 61)
As shown in FIG. 2, the resin protector 61 has an elongated shape in the arrangement direction (left-right direction) of the unit cells 12. The resin protector 61 includes a plurality of connecting units 16 that are connected in the arrangement direction (left-right direction) of the cells 12. The alignment direction of the connection units 16 is the same as the alignment direction of the cells 12 in the cell group 13.

  Among the plurality of bus bars 17, one bus bar 17 and another bus bar 17 located next to the one bus bar 17 are connected by a connecting unit 16. In other words, the plurality of connecting units 16 are connected to each other via the bus bar 17.

(Connection unit 16)
As shown in FIGS. 3 and 4, the connecting unit 16 includes two bus bar accommodating portions 20 that open upward and downward and accommodate the bus bar 17. The two bus bar accommodating portions 20 are formed side by side in the left-right direction (the direction indicated by the arrow OX in FIGS. 3 and 4) and extend in the front-rear direction (the direction indicated by the arrow OY in FIGS. 3 and 4). The insulating walls 22 partition each other.

  As shown in FIG. 7, each bus bar housing portion 20 is formed in a size that can accommodate approximately half of the bus bar 17. The bus bar accommodating portion 20 is formed in a shape surrounded by the above-described insulating wall 22 and the side wall 62 formed to rise in the vertical direction. The bus bar 17 is accommodated in the bus bar accommodating portion 20 in a posture in which the plate surface of the bus bar 17 is directed in the vertical direction.

  As shown in FIG. 3 and FIG. 4, at the position near the lower end portion of the insulating wall 22, it protrudes inward of the bus bar accommodating portion 20 formed on both the left and right sides of the insulating wall 22 and the end portion of the bus bar 17. A plurality of first holding portions 63 are formed to hold the.

  As shown in FIGS. 7 and 8, the first holding portion 63 includes a back side first holding portion 63 </ b> B located on the back surface (lower surface) side of the bus bar 17 and a front side first located on the front surface (upper surface) side of the bus bar 17. Holding part 63A. With the back side first holding part 63B and the front side first holding part 63A, one end of the bus bar 17 in the connecting direction of the connecting unit 16 is sandwiched and held from both the front and back surfaces of the bus bar 17. ing.

  As shown in FIG. 4, the front side first holding portion 63A is formed at a position near the front end portion and a position near the rear end portion of the insulating wall 22, and the back side first holding portion 63B is formed at the insulating wall 22. Is formed near the center in the front-rear direction. Specifically, the front-side first holding part 63A and the back-side first holding part 63B are formed at positions that are offset in the direction (vertical direction) intersecting the plate surface of the bus bar 17.

  As shown in FIGS. 5 and 6, a bus bar insertion hole 64 for inserting the bus bar 17 into the bus bar housing part 20 is formed in the side wall 62 of the bus bar housing part 20 so as to penetrate the side wall 62. The interval between the hole edges of the bus bar insertion hole 64 in the vertical direction is formed wider than the plate thickness of the bus bar 17.

  As shown in FIG. 15, the hole edge portion of the bus bar insertion hole 64 serves as a second holding portion 65 that holds the bus bar 17 from both the front and back surfaces. Specifically, the lower edge portion of the bus bar insertion hole 64 is a back side second holding portion 65B located on the back surface (lower surface) side of the bus bar 17, and the upper edge portion of the bus bar insertion hole 64 is the surface of the bus bar 17. The front side second holding portion 65A is located on the (upper surface) side. The back side second holding portion 65B and the front side second holding portion 65A hold a portion of the bus bar 17 that is different from the end portion held by the first holding portion 63 from both the front and back surfaces of the bus bar 17. It is like that.

  As shown in FIGS. 4, 8, and 15, the back side second holding portion 65 </ b> B is formed to be offset toward the inside of the bus bar housing portion 20 with respect to the front side second holding portion 65 </ b> A. In other words, the back-side second holding portion 65B and the front-side second holding portion 65A are formed at positions that are offset in the direction (vertical direction) in which the plate surfaces of the bus bar 17 intersect.

  As shown in FIG. 15, the upper surface of the back-side first holding part 63 </ b> B and the upper surface of the back-side second holding part 65 </ b> B are respectively opposed to the back surface of the bus bar 17. Further, the upper surface of the back-side first holding part 63B and the upper surface of the back-side second holding part 65B are formed on the same virtual plane 66.

  As shown in FIG. 15, the first gap 67 formed between the upper surface of the back-side first holding portion 63B and the lower surface of the front-side first holding portion 63A is set slightly larger than the plate thickness dimension of the bus bar 17. Has been. In addition, the second gap 68 formed between the upper surface of the back-side second holding portion 65B and the lower surface of the front-side second holding portion 65A is formed wider than the first gap 67 described above.

(Engagement structure of bus bar 17)
As shown in FIG. 7, a retaining portion 69 protruding upward is formed on the rear end edge of the bus bar 17 at a position near both ends in the left-right direction. The retaining portion 69 is formed in a triangular shape as viewed from above.

  As shown in FIG. 8, in a state where the bus bar 17 is accommodated in the bus bar accommodating portion 20, the retaining portion 69 contacts the side wall 62 of the bus bar accommodating portion 20 from the front, whereby the bus bar 17 moves rearward. It comes to regulate that. Further, the front end portion of the bus bar 17 abuts against the side wall 62 of the bus bar accommodating portion 20 from the rear, so that the bus bar 17 is restricted from moving forward.

  As shown in FIG. 10, an engagement recess 71 is formed on the front end edge of the bus bar 17 at a substantially central position in the left-right direction. Further, in the bus bar accommodating portion 20, the engaging convex portion that enters the engaging concave portion 71 of the bus bar 17 and contacts the inner wall surface of the engaging concave portion 71 in a state where the bus bar 17 is accommodated in the bus bar accommodating portion 20. 72 is formed.

  As shown in FIG. 10, the side edges of the bus bar 17 in the left-right direction and the insulating wall 22 abut from the left-right direction, and the engagement convex portion 72 abuts the inner wall surface of the engagement recess 71 from the left-right direction. The bus bar 17 is prevented from coming off from the connecting unit 16 in the left-right direction. The interval between the insulating wall 22 and the engaging convex portion 72 is set to be larger than the interval between the end portion of the bus bar 17 and the inner wall surface of the engaging concave portion 71. In other words, the bus bar 17 is relative to the left and right direction. It is accommodated in the bus bar accommodating part 20 in the state which can be moved in general.

(Voltage detection terminal 73)
Among the two bus bar accommodating portions 20 formed in the connecting unit 16, a voltage detection terminal 73 is provided in one bus bar accommodating portion 20 so as to overlap the bus bar 17 and detect the voltage of the unit cell 12. It is arranged. In the present embodiment, the voltage detection terminal 73 is formed by pressing a metal plate material such as copper, copper alloy, stainless steel, or aluminum into a predetermined shape. The surface of the voltage detection terminal 73 may be plated with a metal such as tin or nickel.

  The voltage detection terminal 73 is formed with a terminal through hole (not shown) through which the electrode post 51 is inserted so as to penetrate the voltage detection terminal 73. The voltage detection terminal 73 is electrically connected to the electrode terminal 11 by being sandwiched between the nut 21 and the bus bar 17. One end of the electric wire 23 is crimped to the barrel portion 74 of the voltage detection terminal 73. The other end of the electric wire 23 is connected to an ECU (not shown).

  The connection unit 16 is formed with a synthetic resin electric wire routing portion 24 that accommodates the electric wires 23 and is wired in the left-right direction. The electric wire routing portion 24 has a substantially groove shape when viewed from the left-right direction, and can accommodate a plurality of voltage detection wires 23. A cover 25 is formed integrally with the wire routing section 24. The cover 25 is held at a position above the wire routing portion 24 in a state where the wire 23 is accommodated in the wire routing portion 24. Thereby, it is suppressed that the electric wire 23 remove | deviates from the electric wire wiring part 24. FIG.

(Bending restriction structure)
Next, the bending restricting structure of the resin protector 61 will be described. As shown in FIG. 15, the bus bar 17 is held with the right end portion in FIG. 15 sandwiched from both the front and back sides by the back side first holding portion 63B and the front side first holding portion 63A. In addition, the bus bar 17 is located at a position different from the end held by the first holding portion 63 and inward of the end in the longitudinal direction (left-right direction in FIG. 15), the back-side second holding portion 65B. And the front side second holding portion 65A is sandwiched and held from both the front and back surfaces.

  Since the upper surface of the back side first holding part 63B and the upper surface of the back side second holding part 65B are formed on a virtual plane 66, the bus bar 17 is connected to the upper surface of the back side first holding part 63B and the back side first side. 2 In a state of being placed on the upper surface of the holding portion 65B, the holding portion 65B is held in a posture parallel to the virtual plane 66. FIG. 16 shows a state in which the connecting units 16 are connected to each other via the bus bar 17 in a state where the bus bar 17 is held in a posture parallel to the virtual plane 66.

  Since the first gap 67 formed between the upper surface of the back side first holding part 63B and the lower surface of the front side first holding part 63A is set slightly larger than the plate thickness dimension of the bus bar 17, The end is slightly movable in the vertical direction between the back side first holding part 63B and the front side first holding part 63A.

  Moreover, since the 2nd clearance gap 68 formed between the upper surface of the back side 2nd holding | maintenance part 65B and the lower surface of the front side 2nd holding | maintenance part 65A is set larger than the 1st clearance gap 67, the bus-bar 17 is the back side. Between the second holding portion 65B and the front side second holding portion 65A, the amount of movement in the vertical direction is larger than the amount of movement of the bus bar 17 in the first gap 67.

  In FIG. 17, the end portion of the bus bar 17 moves upward and comes into contact with the lower surface of the front first holding portion 63A from below, and the back surface of the bus bar 17 comes into contact with the upper surface of the rear second holding portion 65B from above. Indicates the state. As a result, the bus bar 17 is inclined with respect to the virtual plane 66. Specifically, the bus bar 17 has a posture in which the right end portion in FIG. 17 is arranged upward and the left end portion in FIG. 17 is arranged downward.

  FIG. 18 shows a state in which each bus bar 17 and each connecting unit 16 are connected in the above posture. The battery wiring module 14 has a shape in which the left end portion in FIG. 18 is bent downward with respect to the virtual plane 66 in the connection unit 16 arranged at the right end portion in FIG. 18.

  As described above, the battery wiring module 14 (resin protector 61) includes one connection unit 16 among the plurality of connection units 16 and another connection unit 16 connected to the one connection unit 16 via the bus bar 17. Can be bent in the vertical direction. Thereby, the battery wiring module 14 (resin protector 61) can be bent in the vertical direction as a whole.

  Further, FIG. 19 shows that the end of the bus bar 17 moves downward and comes into contact with the upper surface of the rear first holding portion 63B from above, and the surface of the bus bar 17 contacts the lower surface of the front second holding portion 65A from below. Indicates the contact state. Accordingly, the bus bar 17 has a posture in which the right end portion in FIG. 19 is arranged downward and the left end portion in FIG. 19 is arranged upward. FIG. 20 shows a state in which each bus bar 17 and each connecting unit 16 are connected in the above posture. The battery wiring module 14 has a shape in which the left end portion in FIG. 20 is bent upward with respect to the virtual plane 66 in the connection unit 16 arranged at the right end portion in FIG. 20.

  The resin protector 61 can be bent within a predetermined deflection allowable range set in a direction intersecting with the arrangement direction of the cells 12 in a state where the battery wiring module 14 is attached to the cell group 13. . In other words, the amount of bending deformation of the resin protector 61 is regulated so that the resin protector 61 can be bent within a predetermined allowable bending amount range.

  As shown in FIG. 18, the resin protector 61 is restricted so that the allowable bending amount in the bending deformation that protrudes upward is minimized in the direction intersecting the direction in which the connecting unit 16 is connected. As shown in FIG. 20, the resin protector 61 is restricted so that the allowable bending amount in the bending deformation that protrudes downward is maximized in the direction intersecting the direction in which the connecting unit 16 is connected.

  As shown in FIG. 17, the front-side first holding portion 63 </ b> A and the back-side second holding portion 65 </ b> B serve as a minimum bending restricting portion (corresponding to a bending restricting portion) 75 that minimizes the allowable bending amount of the resin protector 61. . In the present embodiment, the minimum bending direction in which the allowable bending amount of the resin protector 61 is minimized is downward.

  Further, as shown in FIG. 19, the back side first holding part 63B and the front side second holding part 65A have a maximum bending restricting part (corresponding to a bending restricting part) 76 that maximizes the allowable bending amount of the resin protector 61. Is done. In the present embodiment, the maximum bending direction in which the allowable bending amount of the resin protector 61 is maximum is upward.

  As shown in FIG. 21, the battery wiring module 14 is placed on the electrode surface 60 (upper surface) of the unit cell 12. Thereby, the lower surface of the resin protector 61 comes into contact with the electrode surface 60 of the unit cell 12 from above. The resin protector 61 is formed so as to be able to bend in a direction intersecting in the direction in which the plurality of unit cells 12 are arranged (left and right direction in FIG. 21) in a state where it is attached to the unit cell group 13. As described above, the minimum bending direction of the resin protector 61 is set downward, and the resin protector 61 is set in a direction from the resin protector 61 toward the electrode surface 60 of the unit cell 12 with the resin protector 61 attached to the unit cell group 13. Yes. Further, the maximum bending direction of the resin protector 61 is set upward, and is set in the direction opposite to the minimum bending direction.

(Assembly process of battery wiring module 14)
Then, an example of the assembly | attachment process of the battery wiring module 14 which concerns on this embodiment is demonstrated. The assembly process of the battery wiring module 14 is not limited to the description of the present embodiment.

  First, a metal plate material is pressed to form a member in which a plurality of bus bars 17 are integrally connected by a carrier 77 in a state in which they are arranged in the left-right direction. On the other hand, a synthetic resin is injection-molded with a mold (not shown), thereby forming a member integrally connected in a state where the plurality of connecting units 16 are arranged in the left-right direction by the runner 78.

  Next, as shown in FIG. 11, each bus bar 17 integrally connected by the carrier 77 is indicated by an arrow P in each bus bar insertion hole 64 formed in the plurality of connection units 16 even connected by the runner 78. Insert from the direction.

  In FIG. 12, the state which inserts the bus-bar 17 in the bus-bar insertion hole 64 is expanded and shown. Each bus bar 17 is inserted into the bus bar insertion hole 64 from the direction indicated by the arrow Q.

  FIG. 13 shows a state where all the bus bars 17 are inserted into the bus bar insertion holes 64 of the connection unit 16. The retaining portion 69 of the bus bar 17 comes into contact with the side wall 62 of the bus bar accommodating portion 20 from the front, so that the bus bar 17 is prevented from slipping backward. Specifically, it comes into contact with the retaining rib 70 suspended from the upper edge portion of the bus bar insertion hole 64 formed in the side wall 62 of the bus bar accommodating portion 20 from the front. Further, the engagement concave portion 71 of the bus bar 17 and the engagement convex portion 72 of the connecting unit 16 abut on each other from the left-right direction, thereby preventing the bus bar 17 from coming off in the left-right direction.

  Subsequently, each bus bar 17 is cut from the carrier 77 and each connection unit 16 is cut from the runner 78. The step of cutting the bus bar 17 and the carrier 77 and the step of cutting the connecting unit 16 and the runner 78 may be executed in the same step or may be executed in separate steps. When the step of cutting the bus bar 17 and the carrier 77 and the step of cutting the connecting unit 16 and the runner 78 are executed in separate steps, either step may be executed first.

  FIG. 14 shows a state in which each bus bar 17 and carrier 77 are cut, and each connection unit 16 and runner 78 are cut. In this state, each connection unit 16 is connected by the bus bar 17.

  Subsequently, the barrel portion 74 of the voltage detection terminal 73 is caulked to the end portion of the electric wire 23, and the voltage detection terminal 73 is accommodated in the bus bar accommodating portion 20. Further, the electric wire 23 is routed in the electric wire routing portion 24. Thereby, the battery wiring module 14 is completed.

(Operation and effect of the embodiment)
Then, the effect | action and effect of this embodiment are demonstrated. According to the present embodiment, when the battery wiring module 14 is lifted from a predetermined placement location and carried to a place where the cell group 13 is connected, inertia force and centrifugal force are applied in the minimum bending direction of the resin protector 61. Thus, the battery wiring module 14 can be prevented from being bent relatively. Thereby, it can suppress that the battery wiring module 14 bends and deform | transforms in the direction which an operator does not intend. As a result, since the operator can handle the battery wiring module 14 as a relatively rigid object, the efficiency of carrying the battery wiring module 14 can be improved. When forming the resin protector 61 formed by connecting a plurality of connecting units 16 as in this embodiment, the resin protector 61 is elongated in the connecting direction of the connecting unit 16. When carrying such a long object, the above configuration is particularly effective.

  In the present embodiment, as shown in FIG. 18, the lower direction in FIG. 18 is the minimum bending direction, and the battery wiring module 14 (resin protector 61) is less likely to be bent into a convex shape in the upper direction in FIG. Therefore, when the operator holds the position near the center in the left-right direction in FIG. 18 among the battery wiring modules 14 and lifts the battery wiring module 14, the battery wiring module 14 is handled as a relatively rigid long object. be able to.

  Further, according to the present embodiment, in the connection work between the unit cell group 13 and the battery wiring module 14, the resin protector 61 is bent in the maximum bending direction, so that the pitch deviation between the electrode terminals 11 is changed for each bus bar 17. The battery wiring module 14 can be attached to the unit cell group 13 while adjusting individually. Thereby, the efficiency of the connection work of the battery wiring module 14 and the cell group 13 can be improved.

  As described above, according to the present embodiment, the efficiency of carrying the battery wiring module 14 is improved, and the efficiency of the connection work between the battery wiring module 14 and the single battery group 13 is improved. The efficiency of the work of attaching the battery wiring module 14 to the battery can be improved as a whole.

  The unit cell 12 has an electrode surface 60 on which the electrode terminals 11 are formed. In a state where the resin protector 61 is attached to the electrode surface 60, the minimum deflection direction is a direction from the resin protector 61 toward the electrode surface 60. The maximum deflection direction is opposite to the minimum deflection direction. With the above configuration, the direction from the resin protector 61 toward the electrode surface 60 is the minimum bending direction, so that the resin protector 61 is restricted from being bent toward the electrode surface 60. Thereby, when attaching the battery wiring module 14 to the cell group 13, it is suppressed that the resin protector 61 bends to the electrode surface 60 side, and the resin protector 61 and the electrode terminal 11 collide. Thereby, in order to avoid that the resin protector 61 and the electrode terminal 11 collide, since it is not necessary for an operator to consider excessively, the efficiency of the attachment work of the battery wiring module 14 to the cell group 13 is improved. Can be made.

  Further, according to the present embodiment, the maximum deflection direction is the direction opposite to the minimum deflection direction. That is, the maximum deflection direction is set in a direction away from the electrode surface 60. As a result, when the battery wiring module 14 is attached to the unit cell group 13, the resin protector 61 bends in the direction away from the electrode surface 60 by bending the resin protector 61 in the maximum bending direction. As a result, since the bus bar 17 can be easily attached to the electrode terminal 11, the efficiency of the work of attaching the battery wiring module 14 to the unit cell group 13 can be improved.

  Further, according to the present embodiment, the resin protector 61 can be easily bent by being bent at a connection portion between one connection unit 16 and another connection unit 16 connected next to the one connection unit 16. It can be bent and deformed.

  Further, according to the present embodiment, the resin protector 61 includes one connection unit 16 among the plurality of connection units 16 and the other connection unit 16 connected next to the one connection unit 16 by the bus bar 17. Concatenated. Accordingly, the plurality of connecting units 16 can be connected by the bus bar 17.

  Further, according to the present embodiment, the bus bar 17 has an elongated shape in the connecting direction of the connecting unit 16, and one end of the bus bar 17 in the connecting direction of the connecting unit 16 is included in the connecting unit 16. A first holding portion 63 that is sandwiched and held from both the front and back surfaces of the bus bar 17, and a second holding portion 65 that is sandwiched and held from both the front and back surfaces of the bus bar 17 at positions different from the end portions of the bus bar 17 held by the first holding portion 63. And comprising. Accordingly, the bus bar 17 is held by the connecting unit 16 by being held by the first holding portion 63 and the second holding portion 65.

  Further, according to the present embodiment, the first holding part 63 includes the back side first holding part 63B located on the back side of the bus bar 17 and the front side first holding part 63A located on the front side of the bus bar 17. The second holding portion 65 includes a back side second holding portion 65B located on the back surface side of the bus bar 17, and a front side second holding portion 65A located on the front surface side of the bus bar 17, and the second holding portion 65 of the back side first holding portion 63B. The surface facing the back surface of the bus bar 17 and the surface facing the back surface of the bus bar 17 of the back-side second holding portion 65B are formed on the same virtual plane 66. Thereby, the back surface of the bus bar 17 can be aligned with the virtual plane 66 by bringing the back surface of the bus bar 17 into contact with the back side first holding portion 63B and the back side second holding portion 65B.

  Moreover, according to this embodiment, it formed between the surface which opposes the surface of the bus bar 17 among the front side 1st holding | maintenance parts 63A, and the surface which opposes the back surface of the bus bar 17 among the back side 1st holding parts 63B. The first gap 67 is set to be slightly larger than the thickness of the bus bar 17, and the surface of the front side second holding portion 65A that faces the surface of the bus bar 17 and the bus bar 17 of the back side second holding portion 65B. The second gap 68 formed between the back surface and the opposite surface is formed wider than the first gap 67, and the minimum deflection restricting portion 75 includes the front side first holding portion 63A and the back side second holding portion. 65B, and the maximum deflection restricting portion 76 includes a back side first holding portion 63B and a front side second holding portion 65A. According to said structure, the edge part of the bus-bar 17 is pinched | interposed between the back side 1st holding part 63B and the front side 1st holding part 63A. The first gap 67 formed between the back side first holding part 63 </ b> B and the front side first holding part 63 </ b> A is set slightly larger than the plate thickness dimension of the bus bar 17. As a result, the bus bar 17 can rotate in the direction intersecting the plate surface of the bus bar 17 with the vicinity of the end of the bus bar 17 sandwiched between the back side first holding part 63B and the front side first holding part 63A as a fulcrum. It has become. The bus bar 17 is sandwiched between the back-side second holding portion 65B and the front-side second holding portion 65A, so that the rotation in the direction intersecting the plate surface of the bus bar 17 is restricted. Specifically, the amount of rotation of the bus bar 17 toward the back surface is restricted by the front side first holding portion 63A and the back side second holding portion 65B coming into contact with the bus bar 17, and the back side first holding portion 63B and the front side first holding portion 63B are regulated. The amount of rotation of the bus bar 17 toward the surface side is regulated by the 2 holding portion 65 </ b> A coming into contact with the bus bar 17.

  The surface of the back side first holding portion 63B that contacts the back surface of the bus bar 17 and the surface of the back side second holding portion 65B that contacts the back surface of the bus bar 17 are formed on the same virtual plane. Therefore, when the front side first holding part 63A and the back side second holding part 65B are in contact with the bus bar 17, the amount of rotation of the bus bar 17 toward the back side becomes relatively small. Thereby, in a state where the connecting unit 16 is connected via the bus bar 17, the allowable amount of bending when the resin protector 61 is bent and deformed toward the back surface side of the bus bar 17 can be made relatively small.

  Since the second gap 68 is formed wider than the first gap 67, the amount of rotation of the bus bar 17 toward the surface side is increased by the back side first holding part 63B and the front side second holding part 65A coming into contact with the bus bar 17. It will be relatively large. Thereby, in a state where the connecting unit 16 is connected via the bus bar 17, the allowable amount of bending when the resin protector 61 is bent and deformed toward the surface side of the bus bar 17 can be made relatively large.

  Further, according to the present embodiment, the back side first holding part 63B and the front side first holding part 63A are formed offset with respect to the direction intersecting the plate surface of the bus bar 17, and the back side second holding part 65B and the front side The second holding portion 65 </ b> A is formed so as to be offset in the direction intersecting the plate surface of the bus bar 17. Thereby, when the connecting unit 16 made of synthetic resin is injection-molded, the molten synthetic resin is injected into a pair of molds that open in the direction intersecting the plate surface of the bus bar 17 and solidified. The first holding part 63 and the second holding part 65 can be formed. Thereby, since it is not necessary to use a comparatively expensive slide type, the manufacturing cost of the battery wiring module 14 can be reduced.

  Further, according to the present embodiment, the bus bar insertion hole 64 into which the bus bar 17 is inserted is formed in the side wall 62 of the connection unit 16 so as to penetrate the side wall 62 of the connection unit 16. The part is a second holding part 65. Thereby, since the hole edge part of the bus-bar insertion hole 64 can be used as the 2nd holding | maintenance part 65, compared with the case where the 2nd holding | maintenance part 65 is formed separately, the connection unit 16 can be reduced in size.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The resin protector 61 may be configured such that a plurality of bus bars 17 are held on one resin plate made of synthetic resin.
(2) An engaging portion that protrudes from one connection unit 16 among the plurality of connection units 16 toward another connection unit 16 located next to the one connection unit 16 is provided in the other connection unit 16. It is good also as a structure by which several connection units 16 are connected by engaging with the received engagement part. The engagement portion and the engagement receiving portion may be engaged by, for example, a known ball joint structure. Moreover, it is good also as a structure which has a latching claw in the front-end | tip of the plate-shaped member in which an engaging part can be elastically bent, and this latching claw latches with an engagement receiving part. As exemplified above, the connection structure between the connection units 16 may adopt any configuration as necessary.
(3) The minimum deflection regulating portion 75 and the maximum deflection regulating portion 76 are provided with a deflection regulating projection from one connection unit 16 toward another connection unit 16 located next to the one connection unit 16. The connection unit 16 may be provided with a deflection regulating projection that abuts against the deflection regulating projection from the deflection regulating direction, and may be formed by adjusting an engagement allowance between the deflection regulating projection and the deflection regulating receiving portion. For example, the engagement allowance may be formed relatively large for the minimum bend restricting portion 75, and the engagement allowance may be made relatively small for the maximum bend restricting portion 76.
(4) The resin protector 61 may be configured such that the direction from the resin protector 61 toward the electrode surface 60 of the unit cell 12 is the maximum bending direction, and the direction away from the electrode surface 60 is the minimum bending direction. In this case, the operator handles the battery wiring module 14 as a relatively rigid long object by holding the positions near both ends of the battery wiring module 14 (resin protector 61) and lifting the battery wiring module 14. be able to.
(5) In the present embodiment, the front side first holding part 63A and the back side first holding part 63B are formed to be offset, but the first holding part 63 is different from the front side first holding part 63A and the back side first side. 1 holding part 63B may be formed in groove shape by opposing. In addition, the front side second holding part 65A and the back side second holding part 65B are formed to be offset, but in the second holding part 65, the front side second holding part 65A and the back side second holding part 65B face each other. Thus, it may be formed in a groove shape.
(6) In the present embodiment, the second holding portion 65 is formed by the hole edge portion of the bus bar insertion hole 64, but is not limited thereto, and the second holding portion 65 is a side wall of the bus bar housing portion 20. It may be formed as a projecting portion projecting inward from 62 and sandwiching the bus bar 17 from both the front and back sides, and may have any shape as necessary.
(7) The bus bar 17 may be accommodated in the bus bar accommodating portion 20 from above the bus bar accommodating portion 20.
(8) In the present embodiment, the plurality of unit cells 12 are connected in series. However, the present invention is not limited to this, and the plurality of unit cell groups 13 may be connected in parallel.
(9) In the present embodiment, the electrode terminal 11 includes the terminal block and the electrode post 51. However, the present invention is not limited thereto, and the electrode terminal 11 may be configured such that a screw hole is formed in the terminal block. . In this case, the bolt is inserted into the through hole formed in the bus bar 17 superimposed on the terminal block and screwed into the screw hole, so that the bus bar 17 is sandwiched between the head of the bolt and the terminal block. The terminal 11 and the bus bar 17 may be electrically connected.
(10) The allowable bending amount of the resin protector 61 in the minimum bending direction may be set to zero.
(11) The resin protector 61 may have a configuration in which the bending allowance is restricted only in one direction among the directions intersecting with the direction in which the cells 12 are arranged, by the bending restriction portion. Moreover, it is good also as a structure by which bending | flexion tolerance is controlled about several directions among the directions which cross | intersect the direction where the cell 12 is located in a line. When the allowable bending amount is regulated for a plurality of directions, all the allowable bending amounts may be set to the same value, or the allowable bending amounts may be different from each other.

DESCRIPTION OF SYMBOLS 11 ... Electrode terminal 12 ... Single cell 13 ... Single cell group 14 ... Battery wiring module 16 ... Connection unit 17 ... Bus bar 60 ... Electrode surface 61 ... Resin protector 62 ... Side wall 63 ... 1st holding part 63A ... Front side 1st holding part 63B ... back side first holding part 64 ... bus bar insertion hole 65 ... second holding part 65A ... front side second holding part 65B ... back side second holding part 67 ... first gap 68 ... second gap 75 ... minimum bending restricting part (bending restriction) Part)
76 ... Maximum deflection regulating part (flexing regulation part)

Claims (10)

A battery wiring module that is attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged to connect the electrode terminals,
A plurality of bus bars connecting the electrode terminals, and a resin protector made of synthetic resin for holding the plurality of bus bars,
The resin protector is capable of being bent and deformed within a range of allowable bending amount set in a direction intersecting with the arrangement direction of the cells.
A battery wiring module in which the resin protector is formed with a bending restricting portion that restricts bending deformation of the resin protector in at least one of the directions intersecting with the arrangement direction of the cells.   The bend restricting portion is a minimum bend restricting portion for restricting the deformation deformation of the resin protector in the minimum bend direction in which the allowable amount of bend of the resin protector in the direction intersecting the arrangement direction of the cells is minimized, and The maximum bending restricting part for restricting the bending deformation of the resin protector in the maximum bending direction in which the allowable bending amount of the resin protector in the direction intersecting with the arrangement direction of the cells is maximized. Battery wiring module. The unit cell has an electrode surface on which the electrode terminals are formed,
In the state where the resin protector is attached to the electrode surface, the minimum bending direction is a direction from the resin protector toward the electrode surface, and the maximum bending direction is set to a direction opposite to the minimum bending direction. The battery wiring module according to claim 2. The resin protector is connected to a plurality of connecting units made of synthetic resin,
The resin protector can be bent at a portion where one connection unit of the plurality of connection units and another connection unit connected next to the one connection unit are connected. Or the battery wiring module of Claim 3.   5. The battery according to claim 4, wherein the resin protector is configured such that one connection unit of the plurality of connection units and another connection unit connected next to the one connection unit are connected by the bus bar. Wiring module. The bus bar has an elongated shape in the connecting direction of the connecting unit,
The connecting unit includes a first holding unit that holds one end of the bus bar in the connecting direction of the connecting unit from both front and back surfaces of the bus bar, and the first holding unit holds the first holding unit. The battery wiring module according to claim 5, further comprising: a second holding portion that holds a position different from the end portion of the bus bar from both the front and back surfaces of the bus bar. The first holding part includes a back side first holding part located on the back side of the bus bar, and a front side first holding part located on the front side of the bus bar,
The second holding part includes a back side second holding part located on the back side of the bus bar, and a front side second holding part located on the front side of the bus bar,
The surface facing the back surface of the bus bar of the back side first holding part and the surface facing the back surface of the bus bar of the back side second holding part are formed on the same virtual plane. 6. The battery wiring module according to 6. A first gap formed between a surface of the front-side first holding portion facing the front surface of the bus bar and a surface of the back-side first holding portion facing the back surface of the bus bar is a plate of the bus bar. It is set slightly larger than the thickness dimension,
A second gap formed between a surface of the front-side second holding portion that faces the surface of the bus bar and a surface of the back-side second holding portion that faces the back surface of the bus bar is the first gap. It is formed wider than the gap,
The minimum deflection restricting portion includes the front-side first holding portion and the back-side second holding portion, and the maximum bending restricting portion includes the back-side first holding portion and the surface-side second holding portion. Item 8. The battery wiring module according to Item 7. The back side first holding part and the front side first holding part are formed offset with respect to the direction intersecting the plate surface of the bus bar,
9. The battery wiring according to claim 6, wherein the back-side second holding portion and the front-side second holding portion are formed to be offset with respect to a direction intersecting the plate surface of the bus bar. module.   The bus bar insertion hole into which the bus bar is inserted is formed in the side wall of the connection unit so as to penetrate the side wall of the connection unit, and the hole edge of the bus bar insertion hole serves as the second holding part. The battery wiring module according to any one of claims 6 to 9.

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