JP2012243647A - Battery pack wiring module and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack wiring module and a manufacturing method thereof that can simplify installation work of a bus bar.SOLUTION: The battery pack wiring module 20 attached to single cell groups 11 in which a plurality of single cells 10 having electrode terminals 12 of a positive electrode and a negative electrode are arranged next to each other, includes a plurality of bus bars 21 connected to the electrode terminals 12 and a resin protector 30 for holding the bus bars 21. It is characterized in that at least one part of the bas bars 21 are collectively disposed on the resin protector 30 in a state of being coupled by a bus bar coupling part 22 and the bus bar coupling part 22 is disconnected after collectively disposing the bas bars 21.

Description

  The present invention relates to a battery wiring module and a manufacturing method thereof.

  In battery modules for electric vehicles and hybrid vehicles, a plurality of single cells having positive and negative electrode terminals are arranged side by side. In such a battery module, a plurality of single cells are electrically connected by connecting a positive electrode terminal (positive electrode terminal) and a negative electrode terminal (negative electrode terminal) with a bus bar. (For example, refer to Patent Document 1).

Japanese Patent Application Laid-Open No. 11-067184

  However, in the configuration as described above, bus bars are prepared according to the number of unit cells to be connected, one bus bar is arranged between the positive terminal and the negative terminal of each unit cell, and the bus bar is provided to each electrode terminal. The complicated work of repeating the connection work was necessary.

  This invention is completed based on the above situations, Comprising: It aims at providing the battery wiring module which can simplify a bus-bar attachment operation | work, and its manufacturing method.

  In order to solve the above problems, the present invention is a battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged, and a plurality of bus bars connected to the electrode terminals, And a resin protector for holding the bus bar, wherein at least a part of the plurality of bus bars is connected to the resin protector in a state where the bus bars are connected by a bus bar connecting part, and the bus bar connecting part collects the plurality of bus bars at once. It is cut after being placed.

  The present invention also relates to a method for manufacturing a battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged, and at least one of the plurality of bus bars connected to the electrode terminals. In a state where the portions are connected by the bus bar connecting portion, the bus bar connecting portion is cut after being collectively disposed on the resin protector holding the bus bar.

  In the present invention, at least a part of the plurality of bus bars are collectively arranged on a resin protector that holds the bus bars in a state of being connected by the bus bar connecting portions, and then the bus bar connecting portions are cut. It can be positioned with respect to the protector. After that, if the plurality of bus bars arranged on the resin protector are connected to the electrode terminals of the unit cell group in which a plurality of unit cells are arranged, the mounting operation of the bus bar is completed. Therefore, according to the present invention, a plurality of bus bars can be positioned and arranged with respect to the resin protector at a time, so that the bus bar mounting operation can be simplified.

The present invention may have the following configurations.
The resin protector includes a plurality of connecting units each having a holding portion that holds the bus bar, and the plurality of connecting units are integrally connected via an interconnecting portion at the time of molding. The interconnecting portions may be cut after the components are collectively arranged.
With such a configuration, even if the resin protector includes a plurality of connecting units, the plurality of bus bars can be positioned and arranged at a time with respect to the resin protector.

A pair of protrusions may be provided on both sides of the cut portion formed after cutting the interconnecting portion of the connecting unit.
Such a configuration eliminates the need for burr processing that may occur in the cut portion formed after the interconnection portion is cut.

Among the plurality of connection units, one connection unit and another connection unit may be connected to each other via the bus bar.
With such a configuration, when a plurality of bus bars are collectively arranged in a plurality of connection units and then the interconnection portion is cut, the plurality of connection units are connected via the bus bars. As a result, according to the above configuration, a separate connection operation between the connection units is not required, and the work efficiency is excellent.

  ADVANTAGE OF THE INVENTION According to this invention, the battery wiring module which can simplify a bus-bar attachment operation | work, and its manufacturing method can be provided.

FIG. 1 is a plan view of a battery module including the battery wiring module according to the first embodiment. FIG. 2 is a perspective view of the battery module before tightening with a nut. FIG. 3 is a perspective view showing a state in which the bus bar is accommodated in the connecting unit. FIG. 4 is a plan view showing a state in which the bus bar is accommodated in the connecting unit. FIG. 5 is a cross-sectional view taken along line AA in FIG. 6 is a cross-sectional view taken along line BB in FIG. FIG. 7 is a side view showing a state where the bus bar is accommodated in the connecting unit. 8 is a cross-sectional view taken along the line CC of FIG. FIG. 9 is a perspective view showing the connecting unit. FIG. 10 is a plan view showing the connecting unit. FIG. 11 is a front view showing the connecting unit. FIG. 12 is a perspective view showing a state before a plurality of bus bars connected by the bus bar connecting portion are arranged in the connecting unit connected by the interconnecting portion. 13 is a partially enlarged perspective view of FIG. FIG. 14 is a perspective view showing a state in which a plurality of bus bars connected by the bus bar connecting portion are collectively arranged in a connecting unit connected by the interconnecting portion. FIG. 15 is a perspective view showing a state when the interconnection part of the connection unit is cut. FIG. 16 is a perspective view showing a state when the bus bar connecting portion is cut.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. The battery wiring module 20 according to the present embodiment is attached to a unit cell group 11 in which a plurality of (in the present embodiment, 24) unit cells 10 having positive and negative electrode terminals 12 are arranged. Hereinafter, the positive electrode terminal 12 is referred to as a positive electrode terminal 12A, and the negative electrode terminal 12 is referred to as a negative electrode terminal 12B.

  A battery module M in which the battery wiring module 20 of the present embodiment is attached to the unit cell group 11 is used as a drive source of a vehicle (not shown) such as an electric vehicle or a hybrid vehicle. The plurality of single cells 10 constituting the single cell group 11 are connected in series by electrically connecting the positive terminal 12 </ b> A and the negative terminal 12 </ b> B of the different single cells 10 by the battery wiring module 20. In the following description, the upper side in FIGS. 2, 5 to 7 and 11 is the upper side and the lower side is the lower side.

(Single cell 10)
The unit cell 10 has a flat rectangular parallelepiped shape. As shown in FIGS. 1 and 2, a positive electrode terminal 12 </ b> A and a negative electrode terminal 12 </ b> B are formed on the upper surface 10 </ b> A of the unit cell 10. The electrode terminal 12 includes a pedestal (not shown) made of a metal plate material, and an electrode post 13B projecting in a round bar shape upward from the pedestal. A thread 14 is formed on the surface of the electrode post 13B as shown in FIG. The plurality of unit cells 10 are arranged so that the positive electrode terminal 12A and the negative electrode terminal 12B are adjacent to each other. The electrode post 13 </ b> B is inserted into a through hole 23 (details will be described later) of the bus bar 21 and is tightened with a nut 15.

(Battery wiring module 20)
The battery wiring module 20 includes a plurality of bus bars 21 having a pair of through holes 23 (connection portions) that are inserted and connected to the electrode posts 13B and 13B of the positive electrode terminal 12A and the negative electrode terminal 12B of the unit cell 10, respectively. And a resin protector 30 made of a synthetic resin having a holding portion 32 for holding the.
In the present embodiment, the resin protector 30 includes a plurality of connection units 31, and the plurality of connection units 31 are connected via the bus bars 21 in the direction in which the cells 10 are arranged.

(Bus bar 21)
The bus bar 21 is formed by pressing a plate material made of metal such as copper, copper alloy, stainless steel, or aluminum into a predetermined shape. As shown in FIG. 3, each bus bar 21 has a substantially rectangular shape. In the present embodiment, as will be described in detail later, after a plurality of bus bars 21 (12 in FIG. 12) are connected by the bus bar connecting portion 22, the bus bars are connected at a predetermined position of the connecting unit 31. The part 22 is cut | disconnected and each bus bar 21 is comprised (refer FIGS. 12-16). The surface of the bus bar 21 may be plated with metal such as tin or nickel. 12-16 is the perspective view which looked at the connection unit 31 and the bus-bar 21 from the back side (surface side arrange | positioned so that the upper surface 10A of the cell 10 may be contacted).

  A pair of through holes 23 are formed in the bus bar 21 at a predetermined interval. In the through hole 23, the positive terminal 12A and the negative terminal 12B of the unit cell 10 are respectively inserted. The through hole 23 in the present embodiment has a circular shape when viewed from above. The pair of through holes 23 are formed at a predetermined interval. In the present embodiment, the predetermined interval is set to the pitch between the adjacent positive electrode terminal 12A and negative electrode terminal 12B. The inner diameter dimension of the through hole 23 is set to be the same or slightly larger than the dimension obtained by adding the tolerance of the pitch between the adjacent positive electrode terminal 12A and the negative electrode terminal 12B to the outer diameter dimension of the positive electrode terminal 12A and the negative electrode terminal 12B. Yes.

  As shown in FIG. 3, the bus bar 21 is formed with an oval hole 24 along with each through hole 23. The oval hole 24 is a detection terminal connection hole 24 to which the voltage detection terminal 50 is connected. Of the pair of long sides of the bus bar 21, the bus bar 21 is connected to both ends of the long side on the side where the detection terminal connection hole 24 is formed, as shown in FIGS. 3 to 5. 21. A retaining protrusion 25 is formed to project upward from the rear wall 35 in the insertion direction (the rear wall in FIG. 4, the rear wall 35).

  In addition, of the pair of long sides of the bus bar 21, a recess 26 that is cut out in a square shape is formed at the center of the long side where the retaining protrusion 25 is formed. The recessed portion 26 is a portion where the bus bar connecting portion 22 for connecting the plurality of bus bars 21 is formed (see FIGS. 12 to 14). The bus bar connecting portion 22 formed in the recessed portion 26 is cut after the plurality of bus bars 21 are collectively arranged on the plurality of connecting units 31 (see FIG. 16). Burrs may occur in the cut portion 22A formed by cutting the bus bar connecting portion 22, but in this embodiment, the cut portion 22A of the bus bar connecting portion 22 is formed in the recess 26. Therefore, burr processing is unnecessary.

  Of the pair of long sides of the bus bar 21, in the substantially central portion of the long side where the retaining protrusion 25 is not formed, as shown in FIG. 4, a range wider than the opposing long side recess 26. A recess 27 cut out in a square shape is formed. The bus bar 21 is locked to the connecting unit 31 by the locking protrusion 39 provided on the connecting unit 31 being locked to the end 27A of the recess 27 of the bus bar 21 (see FIG. 8). ).

(Connecting unit 31)
As shown in FIG. 1, the plurality of bus bars 21 are respectively held by the holding portions 32 of the connection unit 31. Among the plurality of connection units 31, one connection unit 31 and the other connection unit 31 are connected to each other via the bus bar 21.

  The connection unit 31 includes two holding portions 32 and 32 that open upward and receive and hold the bus bar 21, and a wire receiving portion 41 that stores the electric wire 54 connected to the voltage detection terminal 50. In FIG. 1, end connection units 31 </ b> A and 31 </ b> A each having only one holding portion 32 are arranged at the left and right ends of the battery wiring module 20 on the rear side.

  One holding part 32 is formed in a size that can accommodate approximately half of the bus bar 21. As shown in FIGS. 4, 9, and 10, the bottom portion 33 of the holding portion 32 is opened downward leaving the placement portion 33 on which the peripheral portion of the bus bar 21 is placed. Further, an insulating wall 34 that partitions adjacent bus bars 21 is formed between the two holding portions 32 and 32 so as to rise upward. The holding portion 32 includes an insulating wall 34, a placement portion 33, a rear wall 35, left and right side walls 36 (side walls 36) in FIG. 4, a front side wall 37 (front wall 37), and a rear wall 35 in FIG. And a wall 35 </ b> A between the side walls 36.

  The height of the rear wall 35, the wall 35 </ b> A (details will be described later) and the insulating wall 34 of the holding portion 32 is higher than the upper end portion of the electrode terminal 12 when the battery wiring module 20 is connected to the unit cell group 11. Is set. Thereby, it can suppress that a tool etc. contact 12 A of positive electrode terminals and the negative electrode terminal 12B, and the positive electrode terminal 12A and the negative electrode terminal 12B are short-circuited via a tool etc. In the present embodiment, the height of the rear wall 35 and the wall 35A of the holding portion 32 and the height of the insulating wall 34 are set to be the same, but may be different as necessary.

  As shown in FIG. 4, the insulating wall 34 has two holding protrusions 34 </ b> A that are arranged on the upper side of the bus bar 21 accommodated in the holding portion 32 and have a function of holding the bus bar 21 together with the mounting portion 33. 34 </ b> A is formed protruding toward the inside of each holding portion 32. As shown in FIG. 5, a mounting protrusion 34B for mounting the bus bar 21 is formed at the lower end of the insulating wall 34 at a position shifted from directly below the two holding protrusions 34A and 34A. A short side portion of the bus bar 21 is disposed between the protrusion 34A and the mounting protrusion 34B as shown in FIG.

  Further, the holding protrusion 34A and the mounting protrusion 34B formed on the insulating wall 34 allow the bus bar 21 inserted into the holding part 32 from the bus bar insertion port 38 to be inserted in the insertion direction when the bus bar 21 is inserted. And a guide function for guiding the holding portion 32 toward the front wall 37 while maintaining a parallel posture.

  In the present embodiment, the walls 35, 35 </ b> A, 36, and 37 of the holding portion 32 are chamfered in a top view. Specifically, in the present embodiment, a chamfered wall 35 </ b> A is formed between the rear wall 35 and the side wall 36 of the holding portion 32 and is connected at an obtuse angle to the rear wall 35 and the side wall 36. By providing a chamfered wall 35 </ b> A between the rear wall 35 and the side wall 36, it is possible to prevent interference between the cutting tool and the walls 35 and 36 of the connecting unit 31 when cutting the bus bar connecting portion 22.

  As shown in FIGS. 9 and 11, a bus bar insertion port 38 is formed between the walls 35, 35 </ b> A, 36 of the holding portion 32 and the placement portion 33. In the present embodiment, the bus bar insertion port 38 is provided so that the bus bar 21 can be inserted from the rear wall 35 of the holding portion 32 toward the front wall 37 (left direction in FIG. 5).

  The walls 35, 35 </ b> A, 36, and 37 of the holding portion 32 are provided at positions shifted outward from directly above the placement portion 33, as shown in FIGS. 5, 6, and 10. That is, in the bus bar insertion port 38, the walls 35, 35 </ b> A of the holding portion 32 and the mounting portion 33 are provided at positions shifted back and forth in the insertion direction of the bus bar 21. 21 can be inserted, and the bus bar 21 can be smoothly moved forward in the insertion direction. In addition, inclined surfaces 33A and 35B for guiding the insertion of the bus bar 21 are respectively formed on the end surface of the mounting portion 33 and the end surface of the rear wall 35 in the bus bar insertion port 38 (see FIGS. 5 and 11).

  As shown in FIG. 8, the lower end portion of the front front wall 37 (the front side wall 37 in FIG. 4) in the insertion direction of the bus bar 21 of the holding portion 32 is engaged with the end portion 27A of the concave portion 27 of the bus bar 21. The locking projection 39 is formed so as to project in the inner direction of the holding portion 32. As shown in FIG. 8, a clearance in the connecting direction of the connecting unit 31 is formed between the locking projection 39 of the holding part 32 and the recess 27 of the bus bar 21, whereby the connecting unit 31 is connected to the bus bar. 21 is relatively movable.

(Voltage detection terminal 50)
In one holding part 32 of the holding parts 32 of the connection unit 31, a voltage detection terminal 50 is arranged on the bus bar 21 so as to detect the voltage of the unit cell 10. The voltage detection terminal 50 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 50 may be plated with a metal such as tin or nickel.

  In the present embodiment, the voltage detection terminal 50 has a substantially rectangular shape, and a terminal insertion hole (not shown) through which the positive electrode terminal 12A or the negative electrode terminal 12B is inserted is formed near the center. The terminal insertion hole of the voltage detection terminal 50 is disposed so as to overlap with the through hole 23 of the bus bar 21. The voltage detection terminal 50 is provided with a connection protrusion 52 that is inserted into and connected to the detection terminal connection hole 24 of the bus bar 21.

  The voltage detection terminal 50 is formed with a barrel portion 53 connected to the end of the electric wire 54, and is crimped so that the barrel portion 53 is wound around the core wire of the electric wire 54. 54 is electrically connected. The electric wire 54 is connected to an ECU or the like (not shown). The voltage of the unit cell 10 is detected by the ECU or the like.

  In the connection unit 31, a barrel holding part 40 that holds the barrel part 53 of the voltage detection terminal 50 and an electric wire accommodation part 41 that accommodates the electric wire 54 connected to the voltage detection terminal 50 are formed. The electric wire accommodating portion 41 includes a pair of side wall portions 42 and 42 that are cut with respect to the upper surface 10 </ b> A of the unit cell 10, and a bottom wall portion 43 that connects the pair of side wall portions 42 and 42. The electric wire 54 is arranged in a groove-shaped portion 44 formed by the pair of side wall portions 42 and 42 and the bottom wall portion 43.

  A pair of holding claws 45 and 45 for holding the electric wire 54 from above are formed on the pair of side wall portions 42 and 42 of the electric wire housing portion 41. Of the pair of side wall portions 42, 42 of the electric wire housing portion 41, the side wall portion 42 </ b> A opposite to the holding portion 32 (outside) covers a part of the electric wire housing portion 41 and prevents the electric wire 54 from jumping out. 46 is provided via a hinge 47.

  Further, of the pair of side wall portions 42, 42 of the wire accommodating portion 41, the outer wall surface of the outer side wall portion 42 </ b> A is provided with an interconnecting portion 48 that connects the plurality of connecting units 31 when the connecting unit 31 is molded. However, the interconnecting portion 48 is cut after the bus bar 21 is arranged in the connecting unit 31. When the interconnecting portion 48 is cut, burrs may occur after cutting. In this embodiment, a pair of protrusions 49, 49 are provided at positions on both sides of the cutting portion 48A formed after the interconnecting portion 48 is cut. Therefore, burr processing is unnecessary.

(Method for manufacturing battery wiring module 20)
In the present embodiment, as shown in FIG. 12, the plurality of bus bars 21 are collectively connected to the plurality of connection units 31 in a state of being integrally connected by the interconnecting portion 48 while being connected by the bus bar connecting portion 22. It is characterized by being arranged.

  First, a plurality of bus bars 21 and a plurality of connection units 31 are respectively produced. In the present embodiment, the metal plate material is pressed to produce a plurality of bus bars 21 connected by the bus bar connecting portion 22. The plurality of connecting units 31 are formed by injection molding a synthetic resin with a mold (not shown). At the time of molding, the plurality of connecting units 31 are integrally connected by the interconnecting portion 48 (see FIGS. 12 and 13). Here, in this embodiment, the walls 35, 35A, 36, and 37 of the bus bar holding portion and the bottom portion 33 form the connection unit 31 having a configuration that does not overlap in the vertical direction. The cost for manufacturing the mold is reduced, and a space for sliding the slide mold becomes unnecessary.

  Next, as shown in FIG. 13, the plurality of bus bars 21 connected by the bus bar connecting portion 22 are connected to the bus bar insertion openings 38 of the plurality of connecting units 31 connected and formed integrally by the interconnecting portion 48. Place all at once. Next, the plurality of bus bars 21 arranged in a batch are inserted into the bus bar insertion openings 38 of the plurality of connection units 31. In the present embodiment, in the bus bar insertion port 38, the wall 35 of the holding portion 32 and the placement portion 33 are provided at positions shifted in the insertion direction of the bus bar 21 (positions that do not overlap). It can be done easily.

  In addition, an inclined surface 35B is formed on the end surface of the rear wall 35 in the bus bar insertion port 38, and an inclined surface 33A is formed on the end surface of the mounting portion 33, and the walls 35A, 36, and 37 of the holding portion 32 are formed. Since the mounting portion 33 is provided at a position that does not overlap vertically, the bus bar 21 inserted from the bus bar insertion port 38 is guided into the holding portion 32, and the insertion operation can be performed smoothly. The bus bar 21 inserted from the bus bar insertion port 38 is indicated by an arrow X in FIG. 13 while maintaining a substantially parallel posture with respect to the insertion direction between the mounting portion 33 of the holding portion 32 and the holding protrusion 34A. It is guided in the direction (direction of the front wall 37).

  When the retaining protrusion 25 of the bus bar 21 comes into contact with the lower end of the rear wall 35 of the holding portion 32 of the connecting unit 31, the retaining protrusion 25 is elastically deformed downward. When the locking protrusion 39 of the holding part 32 of the connecting unit 31 is arranged in the recess 27 of the bus bar 21, the retaining protrusion 25 of the bus bar 21 is arranged in the holding part 32 and is elastically restored, so that the bus bar 21 is The retaining wall 32 is retained by the rear wall 35. At this time, a clearance in the connecting direction of the connecting unit 31 is formed between the end portion 27A of the recess 27 of the bus bar 21 and the locking protrusion 39 of the holding portion 32 of the connecting unit 31 as shown in FIG. Thus, the connecting unit 31 can move relative to the bus bar 21.

  When all the bus bars 21 are inserted and attached to the bus bar insertion portion 38 of the connection unit 31, a plurality of bus bars 21 connected by the bus bar connection portion 22 are connected by the interconnection portion 48 as shown in FIG. It will be in the state where it was attached to the some connecting unit 31.

  Next, the interconnecting portion 48 that connects the plurality of connecting units 31 is cut (cutting step of the interconnecting portion 48). Then, as shown in FIG. 15, the interconnecting portion 48 is removed and the connecting unit 31 is connected by the bus bar 21. Here, when the interconnecting portion 48 is cut, burrs may occur in the cutting portion 48A of the interconnecting portion 48. In the present embodiment, on both sides of the cutting portion 48A of the interconnecting portion 48 of the connecting unit 31. Since the pair of protrusions 49 are formed, even if burrs are generated in the cut portion 48A, the burr removal process is unnecessary.

  Next, the bus bar connecting portion 22 is cut. In the present embodiment, the walls 35, 35 A, 36, and 37 constituting the holding portion 32 of the connection unit 31 are chamfered when viewed from above, so that the cutting tool and the walls 35 and 36 of the holding portion 32 of the connection unit 31 are formed. Can be cut smoothly without interference. When the bus bar connecting portion 22 is cut in this way, the bus bar connecting portion 22 is removed and the connecting unit 31 is connected via the bus bar 21 as shown in FIG. Here, when the bus bar connecting portion 22 is cut, burrs may occur at the cutting portion 22A of the bus bar connecting portion 22. In this embodiment, the cutting portion 22A of the bus bar connecting portion 22 is formed in the recess 27. Therefore, even if burrs are generated in the cutting part 22A, the burr removal process is unnecessary.

  Next, the voltage detection terminal 50 is attached to the connection unit 31. Specifically, the barrel portion 53 of the voltage detection terminal 50 is caulked to the end portion of the electric wire 54, and one of the two holding portions 32, 32 formed in the connection unit 31 is in one holding portion 32. The voltage detection terminal 50 is accommodated from above and connected to the bus bar 21. And if the barrel part 53 of the voltage detection terminal 50 is hold | maintained at the barrel holding part 40 of the connection unit 31, the electric wire 54 will be arrange | positioned in the electric wire accommodating part 41, and the cover part 46 of the electric wire accommodating part 41 will be closed, this embodiment will be described. The battery wiring module 20 is obtained. 1 and 2 show a state where the lid 46 is opened.

  The battery wiring module 20 of the present embodiment manufactured as described above is arranged on the unit cell group 11 arranged with the electrode terminals 12 facing upward, and each unit is inserted into the through hole 23 of the bus bar 21. When the electrode terminal 12 (electrode post 13B) of the battery 10 is inserted and the nut 15 is screwed, the battery module M is completed. Here, manufacturing tolerances and assembly tolerances between the adjacent positive electrode terminal 12 </ b> A and negative electrode terminal 12 </ b> B are absorbed by the through holes 23 formed in the bus bar 21. However, there is a concern that when the plurality of single cells 10 are arranged, the above-mentioned tolerances are integrated and cannot be absorbed by the through holes 23 formed in the bus bar 21. In the present embodiment, a clearance in the connecting direction of the connecting unit 31 is formed between the locking protrusion 39 of the holding portion 32 and the recess 27 of the bus bar 21, as shown in FIG. Since the connecting unit 31 is movable relative to the bus bar 21, the integrated tolerance can be absorbed.

(Operation and effect of the embodiment)
Hereinafter, the operation and effect of the present embodiment will be described.
In the present embodiment, since the plurality of bus bars 21 are collectively arranged in the connecting unit 31 connected to the interconnecting portion 48 in a state where they are connected by the bus bar connecting portion 22, the bus bar connecting portion 22 is cut. The bus bars 21 can be positioned and arranged with respect to the connecting unit 31 at a time. That is, according to the present embodiment, the plurality of bus bars 21 can be positioned and arranged with respect to the plurality of connecting units 31, so that the work of attaching the bus bars 21 can be simplified.

  In addition, according to the present embodiment, the pair of protrusions 49 are provided on both sides of the cut portion 48A formed after the cut of the interconnection portion 48 of the connection unit 31. There is no need for burr processing that may occur in the cut portion 48A formed after cutting.

  Moreover, according to this embodiment, since one connection unit 31 and the other connection unit 31 are mutually connected via the bus-bar 21 among the some connection units 31, several are connected to the some connection unit 31. When the bus bars 21 are collectively arranged and then the interconnecting portion 48 is cut, the plurality of connecting units 31 are connected via the bus bar 21, so that there is no need to separately connect the plurality of connecting units 31. It is excellent in work efficiency.

  In addition, according to the present embodiment, in a state where the bus bar 21 is locked to the connecting unit 31, the connecting unit 31 is movable relative to the bus bar 21, so that a manufacturing intersection or an assembly intersection can be performed. Can be absorbed.

<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) In the above embodiment, the resin protector including a plurality of connecting units is shown. However, the resin protector may be a single plate that can hold all the bus bars.
(2) In the above embodiment, the bus bar insertion port is provided so that the bus bar can be inserted from the rear wall side (side) of the holding portion in a direction intersecting the assembly direction of the connection unit to the unit cell group. Although a unit is shown, it is not limited to this. For example, without providing a bus bar insertion opening on the wall that constitutes the holding portion, the connecting unit is configured to attach the bus bar from a direction (vertical direction) substantially parallel to the direction in which the connecting unit (resin protector) is assembled to the unit cell. Resin protector).
(3) In the above embodiment, since the plurality of bus bars arranged in a lump is attached from the side of the connecting unit, the holding part of the connecting unit is not provided with a slit through which the bus bar connecting part passes. As a configuration in which a plurality of bus bars arranged in a lump are attached from above the connecting unit, a slit for passing the bus bar connecting portion may be provided in the connecting unit.
(4) In the above-described embodiment, a pair of protrusions are provided on both sides of the cut portion formed after cutting the interconnection portion of the connection unit. However, a pair of protrusions is provided on both sides of the cut portion of the interconnection portion. The protrusion may not be provided.
(5) In the above-described embodiment, the configuration in which one connection unit and the other connection unit among the plurality of connection units are connected to each other via the bus bar. However, the connection unit does not pass through the bus bar. The structure connected with the other connection unit may be sufficient.
(6) In the above-described embodiment, after a plurality of bus bars are collectively arranged in a plurality of connecting units, a cutting step of cutting the interconnecting portions is performed, and then the bus bar connecting portions connecting the plurality of bus bars are cut. However, the present invention is not limited to this. After the plurality of bus bars are collectively arranged in the plurality of connecting units, the cutting process of the interconnecting portions may be performed after the bus bar connecting portion connecting the plurality of bus bars is cut.
(7) Although the bus bar having the retaining projection is shown in the above embodiment, the bus bar may not have the retaining projection.
(8) In the above embodiment, in the bus bar insertion slot, the holding part wall (rear wall, chamfered wall, side wall, and front wall) and the mounting part (bottom part) are formed so as not to overlap. Although shown, the wall and the bottom of the holding part may be formed at a position where they vertically overlap each other with the bus bar insertion opening interposed therebetween.
(9) In the above embodiment, the wall of the holding portion has a chamfered shape when viewed from the top. However, the holding portion may include a wall in which the rear wall and the side wall are vertically or acutely connected. 10) Although the battery wiring module having the voltage detection terminal is shown in the above embodiment, the battery detection module may not be provided with the voltage detection terminal.
(11) In the above-described embodiment, the connection unit having the electric wire accommodating portion is shown, but the electric wire accommodating portion may not be provided.
(12) In the above embodiment, an example is shown in which a plurality of connecting units in which 12 bus bars having the same shape are connected together are arranged, but the present invention is not limited to this. For example, a bus bar that is half the size of a bus bar other than the end as a bus bar that is connected to the end may be placed together in a resin protector (a plurality of connecting units), or six bus bars may be connected. You may arrange | position two things to the resin protector. Moreover, you may arrange | position the bus bar which connected 10 bus bars, and two bus bars which are not connected to a resin protector. In short, all the bus bars may be connected, or a part of the bus bars may be connected to the resin protector.

DESCRIPTION OF SYMBOLS 10 ... Single cell 11 ... Single cell group 12 ... Electrode terminal 12A ... Positive electrode terminal 12B ... Negative electrode terminal 20 ... Battery wiring module 21 ... Busbar 22 ... Busbar connection part 30 ... Resin protector 31 ... Connection unit 32 ... Holding part 38 ... Busbar insertion Mouth 39 ... locking projection 48 ... interconnection 48A ... (formed after cutting the interconnection) cutting portion 49 ... projection

Claims (8)

A battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged,
A plurality of bus bars connected to the electrode terminals, and a resin protector that holds the bus bars,
At least some of the plurality of bus bars are collectively arranged on the resin protector in a state of being connected by a bus bar connecting portion, and the bus bar connecting portion is cut after the plurality of bus bars are collectively arranged. Battery wiring module. The resin protector includes a plurality of connecting units each having a holding portion that holds the bus bar, and the plurality of connecting units are integrally connected via an interconnecting portion at the time of molding. 2. The battery wiring module according to claim 1, wherein the interconnecting portion is cut after the two are arranged together. 3. The battery wiring module according to claim 2, wherein a pair of protrusions are provided on both sides of a cut portion formed after cutting the interconnecting portion of the connecting unit. 4. The battery wiring module according to claim 2, wherein, of the plurality of connection units, one connection unit and another connection unit are connected to each other via the bus bar. A method of manufacturing a battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged,
A battery comprising: a plurality of bus bars connected to the electrode terminals connected to a resin protector that holds the bus bars in a state where at least a part of the bus bars are connected by the bus bar connecting parts; and the bus bar connecting parts are cut off. Manufacturing method of wiring module. The resin protector is formed by integrally connecting a plurality of connecting units each having a holding portion for holding the bus bar via an interconnecting portion at the time of molding.
After arranging the plurality of bus bars collectively on the resin protector in a state where the plurality of connection units are connected by the interconnecting portion,
The method for manufacturing a battery wiring module according to claim 5, wherein a cutting step of cutting the interconnecting portion is performed. The method of manufacturing a battery wiring module according to claim 6, wherein a pair of protrusions are provided on both sides of the interconnecting portion of the connecting unit. The manufacturing of the battery wiring module according to claim 6 or 7, wherein among the plurality of connection units, one connection unit and another connection unit are connected to each other via the bus bar. Method.

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