JP5598725B2 - Battery wiring module - Google Patents

Description

  The present invention relates to a battery wiring module.

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. .
In order to electrically connect a plurality of single cells, for example, a battery wiring module as described in Patent Document 1 is used.

Japanese Unexamined Patent Publication No. 2011-8955

  In the battery wiring module described in Patent Document 1, a plurality of connection units that accommodate bus bars are connected to each other, arranged on a terminal formation surface on which electrode terminals of the unit cells are formed, and accommodated in a holding portion of the connection unit. The connected bus bar and the electrode terminal are connected. Specifically, the bus bar accommodated in the connection unit is formed with terminal insertion holes through which two electrode terminals of adjacent unit cells are inserted, and after the electrode terminals of the unit cells are inserted through the terminal insertion holes, respectively. By tightening the nut, the bus bar and the electrode terminal are electrically connected.

  Since adjacent bus bars need to be insulated from each other, the holding portion of the connection unit described above is provided with a synthetic resin wall portion along the periphery of one bus bar connected to the two electrode terminals. (Refer to FIG. 1 and FIG. 3 of Patent Document).

  In the battery wiring module described above, the insulation between the bus bars is held by the holding portion that houses and holds the bus bars, and the electrode terminals and nuts connected to the bus bars and the bus bars are protected, Further improvement of the strength of the holding part is required.

  This invention is completed based on the above situations, Comprising: It aims at providing the battery wiring module which improved the intensity | strength of the holding part holding a bus-bar.

In order to solve the above problems, the present invention provides 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. When, and a resin protector having a holding portion for holding the bus bar, the holding unit, for each of the electrode terminals, Rutotomoni a protective wall surrounding the electrode terminal, in the holding portion, of the resin protector A bus bar insertion slot for inserting the bus bar is provided in a direction intersecting with the assembly direction to the unit cell group .
According to the present invention, since the protection part of the resin protector is provided with the protective wall surrounding the electrode terminal for each electrode terminal, the strength of the holding part is improved.
Further, according to the present invention, it is possible to prevent the bus bar from being pushed up due to a collision between the resin protector and the terminal forming surface of the unit cell or the electrode terminal.

The present invention may have the following configurations.
The holding portion may be provided with a lifting prevention portion for preventing the bus bar from lifting.
The bus bar arranged in the holding part may float from the holding part due to impact or vibration. Therefore, with the above configuration, even when the battery wiring module receives an impact or the like, the bus bar disposed in the holding portion is prevented from being lifted.

The resin protector includes a plurality of connecting units having the holding portion, and the holding portion of the connecting unit is provided with a guide portion for guiding the bus bar forward from the bus bar insertion port in the bus bar insertion direction. It is good.
With such a configuration, when the bus bar is held by the holding portion, the bus bar inserted from the bus bar insertion port is guided by the guide portion, so that the work efficiency is excellent.

A retaining portion for retaining the bus bar with respect to the holding portion of the connection unit may be formed on the bus bar.
With such a configuration, the bus bar is prevented from being detached from the holding portion, so that the bus bar can be prevented from falling off from the holding portion.

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 the connecting units are arranged and the bus bar is inserted into the bus bar insertion port, a plurality of connecting units are connected via the bus bar. 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 improved the intensity | strength of the holding part holding a bus bar 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 partial plan view of the battery module. FIG. 3 is an enlarged plan view of a part of FIG. FIG. 4 is a perspective view of FIG. FIG. 5 is a partial cross-sectional view of FIG. FIG. 6 is a plan view showing a state where the bus bar is accommodated in the connecting unit. FIG. 7 is a cross-sectional view taken along line AA in FIG. 8 is a cross-sectional view taken along line BB in FIG. FIG. 9 is a side view showing a state where the bus bar is accommodated in the connecting unit. 10 is a cross-sectional view taken along the line CC of FIG. FIG. 11 is a plan view showing the connecting unit. FIG. 12 is a front view showing the connecting unit. FIG. 13 is a side view showing the connecting unit. FIG. 14 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. FIG. 15 is a perspective view showing a state when a plurality of bus bars connected by the bus bar connecting portion are inserted into the bus bar insertion port of the connecting unit connected by the interconnecting portion. FIG. 16 is a perspective view showing a state when the bus bar connecting portion and the interconnecting portion are cut.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. As shown in FIG. 1, the battery wiring module 20 according to the present embodiment is attached to a single cell group 11 in which a plurality (24 in the present embodiment) of single cells 10 having positive and negative electrode terminals 12 are arranged. Is. 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. 5, 7 to 9, 12, and 13 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. As shown in FIG. 5, the electrode terminal 12 includes an electrode post 13 </ b> B that protrudes upward in a round bar shape from a base 13 </ b> A made of a metal plate material. As shown in FIG. 4, a thread 14 is formed on the surface of the electrode post 13B. 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 through and connected to the positive electrode terminal 12 </ b> A and the negative electrode terminal 12 </ b> B of the unit cell 10, and a holding portion 32 that holds the bus bar 21. And a resin protector 30 made of synthetic resin.
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. The surface of the bus bar 21 may be plated with metal such as tin or nickel.

  As shown in FIG. 6, the bus bar 21 is formed with a pair of through holes 23 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 and 7. 21. A retaining protrusion 25 (an example of a retaining part) is formed to project upward from the rear wall 35 (back wall 35 in FIG. 3) in the insertion direction.

  In addition, a recess 26 that is cut out in a square shape is formed at the center of the long side of the pair of long sides of the bus bar 21 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 FIG. 14). The bus bar connecting portion 22 is cut before or after the bus bar 21 is received in the bus bar insertion port 38 of the connecting unit 31 (see FIG. 16). By forming the bus bar connecting portion 22 in the recessed portion 26, the burr processing that can be formed by cutting the bus bar connecting portion 22 is made unnecessary. 14 to 15 are views showing an example of the manufacturing method, and are perspective views showing the connection unit 31 from the back side.

  Of the pair of long sides of the bus bar 21, as shown in FIG. 3, the wider side of the long side on the side where the retaining protrusion 25 is not formed is 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 locking the locking protrusion 39 provided on the connecting unit 31 to the end 27A of the recess 27 of the bus bar 21 (see FIG. 10). ).

(Connecting unit 31)
As shown in FIG. 1, the plurality of bus bars 21 are held by 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 disposed at the left and right ends of the battery wiring module 20 on the back side.

  The holding part 32 is formed in a size that can accommodate approximately half of the bus bar 21. As shown in FIG. 11, 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 back wall 35 (rear wall 35) in FIG. 3, left and right side walls 36 (side walls 36) in FIG. 3, and a front wall 37 (front wall 37) in FIG. ), And a wall 35 </ b> A between the rear wall 35 and the side wall 36.

  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 the 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.

  Now, the rear wall 35, the chamfered wall, the side wall 36, the front wall 37, and the insulating wall 34 of the holding portion 32 are provided so as to surround one electrode terminal 12. In the present embodiment, these walls 34, 35, 35A, 36, and 37 are provided for each electrode terminal 12, and have a function of protecting the electrode terminal 12 (an example of a protective wall). The insulating wall 34 is disposed between two adjacent electrode terminals 12 and 12 and functions as a protective wall for both electrode terminals 12 and 12.

  Among the walls surrounding the electrode terminal 12, the height of the rear wall 35, the chamfered wall 35 </ b> A, and the insulating wall 34 is the same as that of the electrode terminal 12 (electrode post 13 </ b> B) when the battery wiring module 20 is connected to the unit cell group 11. It is set higher than the upper end of (see FIG. 5). 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 chamfered 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 FIGS. 6 and 7, the insulating wall 34 is disposed on the upper side of the bus bar 21 accommodated in the holding portion 32 to prevent the bus bar 21 placed on the placement portion 33 from being lifted up. Two lifting prevention portions 34 </ b> A and 34 </ b> A are formed to protrude toward the inside of each holding portion 32.

  At the lower end of the insulating wall 34, as shown in FIG. 7, there is a mounting protrusion 34 </ b> B for mounting the bus bar 21 at a position shifted in the insertion direction of the bus bar 21 from directly below the two lifting prevention portions 34 </ b> A, 34 </ b> A. Is formed. A short side portion of the bus bar 21 is disposed between the floating prevention portion 34A and the mounting protrusion 34B as shown in FIGS.

  In addition, when the bus bar 21 is inserted, the anti-lifting portion 34A and the mounting projection 34B formed on the insulating wall 34 insert the bus bar 21 into the holding portion 32 from the bus bar insertion port 38. It functions as a guide part that guides forward (front wall 37 side) in the insertion direction while maintaining a posture parallel to the direction (an example of a guide part).

  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, as shown in FIG. 7, the bus bar insertion port 38 is provided so that the bus bar 21 can be inserted in the left direction from the rear wall 35 side of the holding portion 32. That is, the bus bar insertion port 38 is provided so that the bus bar 21 can be inserted in a direction that intersects the direction in which the connecting unit 31 is assembled to the unit cell group 11 (the vertical direction in the present embodiment).

  The walls 35, 35 </ b> A, 36, and 37 of the holding portion 32 are provided at positions that are shifted outward from directly above the placement portion 33, as shown in FIGS. 7, 8, and 11. That is, in the bus bar insertion port 38, the walls 35, 35A of the holding portion 32 and the placement portion 33 are provided at positions shifted in the bus bar insertion direction, and are in a positional relationship such that they do not overlap vertically. The bus bar 21 can be easily inserted from the bus bar insertion port 38, and the bus bar 21 can be smoothly moved forward.

  Further, in the connection unit 31, as shown in FIGS. 7 and 12 (a diagram showing the connection unit 31 from the bus bar insertion port 38 side) and FIG. 13 (a side view of the connection unit 31), a bottom portion of the bus bar insertion port 38 is obtained. Inclined surfaces 33A and 35B (an example of a guide surface) for guiding the insertion of the bus bar 21 are formed on the end surface 33 and the end surface of the rear wall 35, respectively.

  At the lower end portion of the front wall 37 in the insertion direction of the holding bar 32 in the bus bar 21 insertion direction, as shown in FIG. 32 is formed so as to protrude in the inner direction. As shown in FIG. 10, 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 51 through which the positive electrode terminal 12A or the negative electrode terminal 12B is inserted is formed near the center. The terminal insertion hole 51 of the voltage detection terminal 50 is disposed so as to overlap 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.

  Moreover, a pair of protrusions 49 and 49 are provided on the outer wall surface of the outer side wall portion 42 </ b> A among the pair of side wall portions 42 and 42 of the electric wire housing portion 41. When the connecting unit 31 is molded, an interconnecting portion 48 that connects the plurality of connecting units 31 is provided between the protrusions 49 of the side wall portion 42A of the wire accommodating portion 41. 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 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)
Hereinafter, an example of the manufacturing method of the battery wiring module 20 of this embodiment is demonstrated.
First, a plurality of bus bars 21 and a plurality of connection units 31 are respectively produced. 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 FIG. 14). Here, in this embodiment, the walls 35, 35A, 36, and 37 of the holding portion 32 and the bottom portion 33 (mounting portion 33) form the connecting unit 31 that does not overlap in the vertical direction. This eliminates the need for use, reduces the cost of mold manufacture, and eliminates the need for a space for sliding the slide mold.

  As shown in FIG. 14, the plurality of connected bus bars 21 manufactured as described above are arranged on the bus bar insertion port 38 side of the plurality of connecting units 31 that are integrally connected by the interconnecting portion 48. . Next, the plurality of bus bars 21 are respectively inserted into the bus bar insertion openings 38 of the corresponding connecting units 31. In the present embodiment, in the bus bar insertion port 38, the rear wall 35 and the chamfered wall 35 </ b> A and the placement portion 33 are provided so as to be shifted in the insertion direction of the bus bar 21. Since the inclined surfaces 35B and 33A are formed on the end surface of the bottom portion 33, 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 guided toward the front wall 37 while maintaining a substantially parallel posture with respect to the insertion direction between the bottom 33 of the holding portion 32 and the holding projection 34A.

  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 (see FIG. 7). At this time, a clearance in the connecting direction of the connecting unit 31 is formed between the end 27A of the recess 27 of the bus bar 21 and the locking protrusion 39 of the holding part 32 of the connecting unit 31, as shown in FIG. Thus, the connecting unit 31 can move relative to the bus bar 21.

  After all the bus bars 21 are inserted into the bus bar insertion openings 38 of the connection unit 31, the interconnecting part 48 connecting the plurality of connection units 31 and the bus bar connecting part 22 connecting the plurality of bus bars 21 are cut. . When the cutting and removing operation of the interconnecting portion 38 and the bus bar connecting portion 22 is completed, the interconnecting portion 48 and the bus bar connecting portion 22 are removed and the connecting unit 31 is connected by the bus bar 21 as shown in FIG.

  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. FIG. 1 shows a state in which 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 post 13B of the electrode terminal 12 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.
According to the present embodiment, the holding portion 32 of the connection unit 31 (resin protector 30) is provided with the protective walls 34, 35, 35A, 36, and 37 that surround the electrode terminal 12 for each electrode terminal 12. Therefore, the strength of the holding part 32 is improved.

  Further, according to the present embodiment, since the holding portion 32 is provided with the lifting prevention portion 34A that prevents the bus bar 21 from being lifted, even if the battery wiring module 20 receives an impact or the like, the holding portion 32 is arranged in the holding portion 32. The raised bus bar 21 is prevented from floating.

  Further, according to the present embodiment, the holding portion 32 is provided with the bus bar insertion port 38 for inserting the bus bar 21 in a direction intersecting with the assembly direction of the connection unit 31 to the unit cell group 11. The bus bar 21 is prevented from being pushed up due to a collision between the connecting unit 31 and the upper surface 10A (terminal forming surface) of the unit cell 10 or the electrode terminal 12.

  Further, according to the present embodiment, the holding unit 32 of the connection unit 31 has the floating prevention unit 34A and the mounting projection 34B (guides) that guide the bus bar 21 forward from the bus bar insertion port 38 in the insertion direction of the bus bar 21. Therefore, when the bus bar 21 is held by the holding part 32, the bus bar 21 inserted from the bus bar insertion port 38 is guided by the lifting prevention part 34A and the mounting protrusion 34B, so that the work efficiency is improved. Excellent. In particular, in the present embodiment, since the lifting prevention portion 34A also serves as a guide portion, the bus bar 21 can be prevented from lifting even when the bus bar 21 is inserted.

  Further, according to the present embodiment, the bus bar 21 is formed with the retaining protrusion 25 that prevents the bus bar 21 from coming off from the holding part 32 of the connecting unit 31, so that the bus bar 21 is prevented from coming off from the holding part 32. Thus, the bus bar 21 can be prevented from falling off the holding portion 32.

  Furthermore, in 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, the connection unit 31 is put in order and the bus-bar insertion port 38 is arranged. If the bus bar 21 is inserted, the plurality of connecting units 31 are connected via the bus bar 21. As a result, according to the present embodiment, a separate connection work between the connection units 31 and 31 is not required, and the work efficiency is excellent.

  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 technology disclosed in this specification is not limited to the embodiment described with reference to the above description and drawings, and may be, for example, the following embodiment .
(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-described embodiment, the holding portion provided with the lifting prevention portion also serving as the guide portion is shown. However, the guide portion and the lifting prevention portion may be provided separately or not provided with the lifting prevention portion. May be.
(3) In the above embodiment, the bus bar insertion port for inserting the bus bar from the rear wall (side) of the holding portion in the front wall direction (that is, the direction crossing the assembly direction (vertical direction) of the connecting unit to the unit cell group). However, the present invention 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).
(4) In the above-described embodiment, the connection unit is shown in which the guide part that guides the bus bar forward in the insertion direction is provided in the holding part, but the guide part may not be provided.
(5) Although the bus bar having the retaining projection is shown in the above embodiment, the bus bar may not have the retaining projection.
(6) 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 is shown. However, the connection unit is not connected to the bus bar. The structure connected with the other connection unit may be sufficient.
(7) In the above embodiment, the electrode terminal includes a pedestal and the electrode post protruding from the pedestal and having a thread formed on the surface. However, the electrode terminal is, for example, a nut-shaped one. May be.
(8) In the above embodiment, in the bus bar insertion port, the wall portion and the placement portion of the holding portion are formed at positions shifted in the insertion direction of the bus bar. The mounting portion may be formed at a position that overlaps with the bus bar insertion opening.
(9) In the above-described embodiment, the inclined surface that guides the insertion of the bus bar is provided on both end surfaces of the wall portion and the mounting portion. However, the inclined surface is not provided on both the wall portion and the mounting portion. A thing or what provided the inclined surface only in any one may be sufficient.
(10) In the above embodiment, a manufacturing method including a step of inserting a plurality of bus bars in a connected state into bus bar insertion ports of a plurality of connected units in a connected state is shown, but the present invention is not limited to this. A plurality of unconnected bus bars may be inserted into the bus bar insertion ports of a plurality of connected units in a connected state, or a plurality of unconnected connection units are arranged and a bus bar is inserted into each bus bar insertion port. (It may be connected or not connected) may be inserted.
(11) In the above-described embodiment, the wall of the holding portion has a chamfered shape when viewed from the top. However, the holding portion may include a wall portion in which the rear wall and the side wall are connected vertically or at an acute angle. (12) Although the battery wiring module having the configuration including the voltage detection terminal has been described in the above embodiment, the battery detection module may not include the voltage detection terminal.
(13) 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.

DESCRIPTION OF SYMBOLS 10 ... Single cell 11 ... Single cell group 12 ... Electrode terminal 12A ... Positive electrode terminal 12B ... Negative electrode terminal 13A ... Base (electrode terminal)
13B ... Electrode post (electrode terminal)
14 ... Nut 20 ... Battery wiring module 21 ... Bus bar 22 ... Bus bar connecting part 25 ... Retaining protrusion (retaining part)
DESCRIPTION OF SYMBOLS 30 ... Resin protector 31 ... Connection unit 32 ... Holding part 33 ... Bottom part (mounting part)
34 ... Insulating wall (protective wall)
34A ... Lifting prevention part (guide part)
34B ... Placement protrusion (guide part)
35 ... Rear wall (protective wall)
35A ... Chamfered wall (protective wall)
36 ... side wall (protective wall)
37 ... Front wall (protective wall)
38 ... Bus bar insertion slot

Claims (5)

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 having a holding portion for holding the bus bars;
The holding unit, for each of the electrode terminals, wherein the protective wall which surrounds the electrode terminal is provided Rutotomoni, in the holding unit, the bus bar in a direction intersecting the assembling direction to said cell group of the resin protector A battery wiring module, characterized in that a bus bar insertion slot for inserting a battery is provided . The battery wiring module according to claim 1, wherein the holding portion is provided with a lifting prevention portion that prevents the bus bar from lifting. The resin protector includes a plurality of connecting units having the holding portion,
3. The battery wiring according to claim 1 , wherein a guide portion that guides the bus bar forward from the bus bar insertion port in the insertion direction of the bus bar is provided in the holding portion of the connection unit. module. 4. The battery wiring module according to claim 3, wherein among the plurality of connection units, one connection unit and another connection unit are connected to each other via the bus bar . The battery wiring module according to any one of claims 1 to 4 , wherein a retaining portion for retaining the bus bar with respect to the holding portion is formed on the bus bar .

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