JP2013037987A - Battery wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a battery wiring module.SOLUTION: A battery wiring module 20 comprises: a plurality of connecting members 21 which connect between adjacent electrode terminals 12A and 12B of a plurality of unit cells 11 having the positive and negative electrode terminals 12A and 12B; a plurality of holding parts 24 for holding each connecting member 21; voltage detection terminals 37 which have flat plate parts 38 stacked on the connecting members 21 and are connected to an electric wire W1; and electric wire passing parts 36 which are connected to the voltage detection terminals 37 and into which the electric wire W is inserted. The battery wiring module has a structure, in which a drawing-out direction X1 of the electric wire W1 from the voltage detection terminal 37 is an inclined direction to a direction Y orthogonal to an aligning direction of the adjacent unit cells 11, the flat plate part 38 has a rectangular shape in which short sides 38S and long sides 38L are alternately arranged in a circumferential direction, and the dimension of the short side 38S is the same dimension as or larger than a diameter of a seat face 12D pressure-contacted by the flat plate part 38.

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, and electrode terminals of adjacent single cells are connected by a bus bar (connection member). Thus, a plurality of single cells are connected in series or in parallel (see Patent Document 1).

  In the bus bar module (battery wiring module) of Patent Document 1, square voltage detection terminals for detecting the voltage of the unit cells are overlapped on the bus bar. The electric wire connected to the voltage detection terminal is led to the battery ECU.

JP 2010-170884 A

  By the way, in the configuration of Patent Document 1, the electric wire connected to the voltage detection terminal is pulled out in the width direction of the unit cells (direction perpendicular to the arrangement direction of the adjacent unit cells) together with the electric wire connection portion, and then the second housing. It is bent at a substantially right angle at the portion and led to the battery ECU side. However, when the electric wire is drawn out in the width direction of the unit cell, a space for arranging the electric wire and the electric wire connection portion is increased in the width direction of the unit cell, so that there is a problem that the battery wiring module is easily obstructed. .

  The present invention has been completed based on the above circumstances, and an object thereof is to reduce the size of a battery wiring module.

  The present invention provides a plurality of connecting members that connect adjacent electrode terminals of a plurality of single cells having positive and negative electrode terminals, a plurality of holding portions that hold each connecting member, and a terminal portion that is superimposed on the connecting member. And having a detection terminal connected to the electric wire and an electric wire passage portion through which the electric wire connected to the detection terminal is passed, and the direction of drawing out the electric wire from the detection terminal is the arrangement direction of adjacent cells The terminal part is a direction inclined with respect to the orthogonal direction, and the terminal part has a quadrangular shape in which the short side and the long side are alternately arranged in the circumferential direction, and the dimension of the short side of the terminal part is pressed against the terminal part. It is characterized in that it is configured to have the same size as the maximum size of the seating surface or a size larger than this.

  According to such a configuration, the short side of the terminal portion of the detection terminal is shortened so as to have the same dimension as the maximum dimension of the seating surface or a larger dimension. Compared to the case where the terminals are formed only by the long side (that is, the case where the terminal portion is constituted only by the long side), it is not necessary to secure the space in the direction orthogonal to the arrangement direction of the adjacent unit cells. Therefore, the battery wiring module can be reduced in size.

The following configuration is preferable as an embodiment of the present invention.
The detection terminal has a connection portion connected to one of the short side and the long side and connected to the terminal portion of the electric wire, and the connection portion is a direction orthogonal to the extending direction of the one side. It is good also as a structure extended to.
According to such a configuration, it is not necessary to secure a space in the direction orthogonal to the arrangement direction of the adjacent unit cells, as compared with the case where the connecting portion extends in the direction orthogonal to the arrangement direction of the adjacent unit cells. Good.

The wire passage part may be provided along the plurality of holding parts, and the extending direction of the connection part may be directed toward the wire passage part.
When the wire connected to the connection part is pulled out to the side opposite to the wire passage part side, the length of the wire becomes longer. According to this configuration, the wire connected to the connection part is moved to the wire passage part side. Since it can be pulled out, the length of the electric wire can be shortened.

The holding portion may be provided with a partition wall that partitions the connection member from the outside, and a corner portion of the terminal portion may enter the partition wall.
According to such a configuration, the battery wiring module can be reduced in size by the amount that the corner portion of the terminal portion enters the partition wall.

It is good also as a structure by which the recessed part which inserts the corner | angular part of a terminal part is formed in the partition wall.
According to such a configuration, it is possible to reduce the size of the battery wiring module with a simple configuration, and it is possible to prevent the detection terminal from rotating when the bolt is tightened by the recess.

It is good also as a structure by which the penetration recessed part which lets the corner | angular part of a terminal part pass is formed in the inner surface of a partition wall.
According to such a configuration, it is possible to reduce the size of the battery wiring module with a simple configuration, and it is possible to prevent the detection terminal from rotating during bolting.

The through recess may be configured as a through hole penetrating the partition wall.
According to such a configuration, the battery wiring module can be further reduced in size.

The partition wall may have a configuration in which an auxiliary wall that covers a corner portion of the terminal portion that penetrates the through hole is formed on the outer surface side of the partition wall.
When the terminal portion is exposed to the outside, there is a concern about the insulation, but according to this configuration, it is possible to prevent the insulation from being lowered.

The battery wiring module is configured by connecting a plurality of connecting units, and each connecting unit is provided with an electric wire passing portion, and the connecting units are connected to connect the electric wire passing portions in adjacent connecting units. It is good.
If the battery wiring module is molded integrally, a new mold or the like is required to change the configuration of the battery wiring module according to the change in the number of single cells (change in length, etc.). Since the number of connections of the connection units may be changed according to the number of batteries, the configuration of the battery wiring module can be easily changed.

The connecting portion may be configured to be continuous with the central portion of the short side of the terminal portion.
According to such a structure, the protrusion dimension to the electric wire passage part side of a detection terminal can be reduced more.

  According to the present invention, it is possible to reduce the size of the battery wiring module.

The top view which abbreviate | omitted and represented some battery modules with which the battery wiring module which concerns on Embodiment 1 was attached A plan view showing a part of the battery wiring module omitted. The enlarged view of the part where the voltage detection terminal is attached The figure which expanded and expressed the part where the voltage detection terminal of other different arrangement was attached Front view showing an enlarged part of the battery wiring module A plan view showing a part of the resin protector omitted. The figure which expanded and represented the holding | maintenance part of the part represented by FIG. The figure which expanded and represented the holding | maintenance part of the part represented by FIG. AA sectional view of FIG. BB sectional view of FIG. The top view which abbreviate | omitted and represented some cell groups formed by arranging a plurality of cells The figure which expanded and represented the part to which the voltage detection terminal was attached in the battery wiring module which concerns on Embodiment 2. FIG.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the battery wiring module 20 of the present embodiment is attached to a single battery group (see FIG. 11) in which a plurality of single cells 11 are arranged to constitute a battery module 10. The module 10 is used as a drive source of an electric vehicle or a hybrid vehicle, for example. In the following description, the front-rear direction will be described with the upper side in FIG. 1 as the front and the lower side as the rear, and the up-down direction will be described with the front side in FIG.

As shown in FIG. 1, the battery module 10 includes, for example, a plurality of unit cells 11 (unit cell group) arranged side by side and a battery wiring module 20 attached to the plurality of unit cells 11. ing.
As shown in FIG. 11, the unit cell 11 includes nut-shaped electrode terminals 12A and 12B (a positive electrode 12A and a negative electrode 12B) that protrude vertically from an end face of a rectangular parallelepiped body portion in which a power generation element (not shown) is accommodated. And a nut-like intermediate electrode 12C. The upper surfaces of the electrode terminals 12A and 12B and the intermediate electrodes 12C are electrode-side seating surfaces 12C. Bolt holes into which bolts (not shown) can be screwed are formed in the seating surfaces 12C so as to be recessed downward. Has been.

  The direction of the polarity (positive / negative) of each unit cell 11 is arranged so that the unit cells 11 adjacent to each other are opposite to each other, so that the electrode terminals 12A and 12B having different polarities are adjacent to each other. ing. The plurality of single cells 11 are fixed by a holding plate (not shown).

As shown in FIG. 2, the battery wiring module 20 includes a plurality of connecting members 21 that connect the electrode terminals 12A and 12B adjacent to each other on the left and right sides, and are connected to the terminal portions of the electric wires W1 that are stacked on the connecting members 21. A plurality of voltage detection terminals 37 for detecting the voltage of the battery 11 (an example of a “detection terminal” having the configuration of the present invention), a plurality of intermediate voltage detection terminals 43 connected to the terminal portion of the electric wire W2, and the connection member 21 , A voltage detection terminal 37, and a resin protector 20A made of synthetic resin that accommodates the intermediate voltage detection terminal 43.
The connection member 21 is made of a metal such as copper, copper alloy, or aluminum, has a generally rectangular plate shape, and has insertion holes 22 and 22 through which a shaft portion of a bolt that is a fastening member is inserted. The insertion holes 22 and 22 have an oval shape that is long in the left-right direction.

The voltage detection terminal 37 is provided for measuring the voltage of the unit cell 11, and, as shown in FIG. 3, a rectangular flat plate portion (an example of the “terminal portion” having the configuration of the present invention) 38, It consists of the connection part 39 which continues to the flat plate part 38 and is connected to the terminal part of the electric wire W1.
The flat plate portion 38 has a rectangular shape in which short sides 38S and long sides 38L are alternately arranged in the circumferential direction. The flat plate portion 38 has four right-angled corners, and has a circular insertion hole 38 </ b> A that substantially communicates with the insertion hole 22 (having the same central axis) at the center. The long side 38L of the flat plate portion 38 is formed in a direction along the drawing direction X1 of the electric wire W1, and the connecting portion 39 (and the electric wire W1) is connected to the central portion of the short side 38S of the flat plate portion 38.

  The connecting portion 39 is formed with a stepped width from the short side 38S of the flat plate portion 38, and the insulating coating (insulating layer) is peeled off at the terminal portion of the electric wire W1 made of a covered electric wire. The exposed and exposed conductor portions are connected by, for example, crimping. Further, the connecting portion 39 extends in a direction orthogonal to the extending direction S of the short side 38S of the flat plate portion 38 (that is, the extending direction L of the long side 38L of the flat plate portion 38).

  In FIG. 3, the bolt-side seating surface 13 when each bolt is inserted through the insertion hole 22 is indicated by a broken line. The dimension of the short side 38 </ b> S of the flat plate portion 38 is slightly larger than the diameter (maximum dimension) of the bolt-side seat surface 13, and the entire bolt-side seat surface 13 is disposed within the range of the flat plate portion 38. Is set to The diameter of the bolt-side seating surface 13 is smaller than the length (minimum dimension) of one side of the electrode-side seating surface 12D, and the bolt-side seating surface is within the range of the electrode-side seating surface 13. It is set so that the whole 13 is arranged.

  The intermediate voltage detection terminal 43 is for measuring the voltage of the intermediate part of the unit cell 11, and as shown in FIG. 2, a plate-like rectangular part smaller than the flat plate part 38 of the voltage detection terminal 37, It consists of a crimping part that is connected to a rectangular part and is crimped to the exposed conductor of the end of the wire W2 that is a coated electric wire. The rectangular part has an insertion hole through which the shaft part of the bolt can be inserted at the center part.

  The electric wire W1 and the electric wire W2 are collected in an electric wire passage portion 36 to be described later and guided to a battery ECU (not shown) on the right side. The battery ECU is equipped with a microcomputer, elements, and the like, and has functions for detecting voltage, current, temperature, etc. of the unit cells 11 and controlling charge / discharge of each unit cell 11. It has a known configuration.

As shown in FIG. 6, the resin protector 20 </ b> A includes a plurality of holding portions 24 that hold the connection members 21, a terminal accommodating portion 45 that accommodates the intermediate voltage detection terminal 43, and an electric wire through which the electric wires W <b> 1 and W <b> 2 are passed. And a through portion 36.
The plurality of holding portions 24 are provided in a row on the front side and the rear side of the resin protector 20 </ b> A, and both are formed so as to surround the bottom plate 25 on which the connection member 21 is placed and the connection member 21. And a partition wall 27.

As shown in FIG. 7, the bottom plate 25 has an intermediate support portion 25A for connecting the base end portions of the front and rear partition walls 27 at the intermediate portion in the width direction, and slightly inward from the base end of the partition wall 27 at the left and right end portions. The portion without the bottom plate 25 is the opening 26 in which the electrode terminals 12A and 12B are arranged.
The partition wall 27 surrounds the connection member 21 at a height at which contact of the fastening tool is prevented, for example, in order to prevent the fastening tool from coming into contact with the electrode terminals 12A and 12B and the connection member 21 and short-circuiting. It is erected in a ring shape around the connection member 21.
The annular partition wall 27 is formed in a rectangular tube shape by connecting a pair of front and rear opposing walls 27E extending in the left-right direction and a pair of left and right side walls 27F extending in the front-rear direction.

The partition wall 27 (each opposing wall 27E) is provided with a locking piece 29 that can be bent and deformed in the front-rear direction to restrict the separation of the connection member 21. By disposing the connecting member 21 below the portion protruding inward of the locking piece 29, the detachment of the connecting member 21 is restricted.
Moreover, as shown in FIG. 7, the partition wall 27 is provided with recesses 27A, 27B, and 27C into which corner portions of the flat plate portion 38 of the voltage detection terminal 37 are fitted from above. Further, a through hole 27D is provided through the partition wall 27 in the concave portion 27A located on the side far from the through groove 30 among the concave portions 27A, 27B, and 27C, as shown in FIG. Of the corners of the voltage detection terminal 37, the corners fitted into the recesses 27A are inserted into the through holes 27D.

  The recesses 27A, 27B, and 27C are provided at a height position (position of the upper surface of the connection member 21) where the voltage detection terminal 37 is placed, and the drawing direction X1 of the electric wire W1 is the front-rear direction Y (adjacent unit cells). The flat plate portion 38 can be positioned (stopped) in a posture that is inclined (angle θ1) with respect to the direction in which the flat plate portions 38 are arranged. As shown in FIG. The upper and inner surfaces of the partition wall 27 are cut out so that the three corners can be fitted and positioned. The recesses 27 </ b> B and 27 </ b> C have a shape in which the partition wall 27 wraps around the outside of the corner of the flat plate portion 38 in a frame shape so that the corner of the flat plate portion 38 is not exposed to the outside of the partition wall 27. ing.

The through hole 27 </ b> D is a through hole penetrating in a slit shape through which a corner portion of the flat plate portion 38 can pass, and is opened with a diameter (upper and lower diameters) slightly larger than the thickness of the flat plate portion 38.
An auxiliary wall 32 is provided on the outer surface side of the through hole 27D penetrating the partition wall 27, and the entire through hole 27D is covered by the auxiliary wall 32. The auxiliary wall 32 is formed at a predetermined interval with respect to the outer surface of the partition wall 27, and the corner portion of the flat plate portion 38 penetrating the through hole 27 </ b> D is disposed inside the auxiliary wall 32. The auxiliary wall 32 is integrally connected to the partition wall 27 by narrowing the gap between the auxiliary wall 32 and the partition wall 27 in a step shape in the left-right direction.

In addition, a through groove 30 through which the connecting portion 39 of the voltage detection terminal 37 is passed is recessed at a position including the corner portion of the partition wall 27 in the holding portion 24. In the through groove 30, a pair of clamping pieces 30 </ b> A and 30 </ b> A that clamp the connection part 39 of the voltage detection terminal 37 from both sides are formed. The through groove 30 is provided at a corner position of the holding portion 24 on the side of the wire passage portion 36 so as to communicate (join) with the wire passage portion 36 from an oblique direction.
Thereby, when the voltage detection terminal 37 is attached and the connection portion 39 is accommodated in the through groove 30, the drawing direction of the electric wire W1 from the voltage detection terminal 37 (the connection portion 39) is as shown in FIG. It becomes a direction (direction inclined by an angle θ1) inclined with respect to the front-rear direction Y (direction orthogonal to the direction in which the adjacent unit cells 11 are arranged), and the electric wire passing portion is bent so that the electric wire W1 drawn in this direction is folded back. 36.

  Here, the voltage detection terminal 37B attached to the holding portion 24B at the end of the row of the holding portions 24 on the rear side is different from the other voltage detection terminals 37A with respect to the front-rear direction Y as shown in FIG. The electric wire W1 is drawn out in an inclined direction (a direction inclined by an angle θ2, θ2 <θ1) X2. Accordingly, the recesses 28A and 28B into which the corners of the voltage detection terminal 37B provided on the partition wall 27 are fitted and the through holes 28D through which the corners are passed are also arranged at positions different from those of the other holding portions 24A. (See FIG. 8).

  As shown in FIG. 6, the terminal accommodating portion 45 is formed such that a mounting recess 45 </ b> A for mounting the intermediate voltage detection terminal 43 is connected to the electric wire passing portion 36. A rectangular hole for connecting to the electrode 12C is opened. The intermediate voltage detection terminal 43 is attached to the attachment recess 45A, and the electric wire W2 is passed through the electric wire passage portion.

  The wire passing portion 36 is provided in a groove shape (two rows) between the front holding portion 24 and the terminal accommodating portion 45 and between the terminal accommodating portion 45 and the rear holding portion 24. A pair of claw portions 36A for holding the electric wires W1, W2 in the electric wire passage portion 36 are provided in the electric wire passage portion 36 so as to face each other in the front-rear direction in the upper part of the electric wires W1, W2.

  The resin protector 20A is composed of a plurality of connecting units (the boundary portion of the connecting units is indicated by CC in FIG. 6), and the connecting units are connected via connecting members 21. By engaging the engaged portions recessed in the connection member 21 and the engaging portions protruding from each connection unit with a clearance, the left and right connection units have a dimensional tolerance within the clearance. It can be absorbed. When this connecting unit is connected to the left and right, the wire passing portions 36 of adjacent connecting units are connected.

Next, assembly of the battery wiring module 20 will be described.
First, the resin protector 20A is formed by connecting a plurality of connecting units to the left and right (FIG. 6). Next, the intermediate voltage detection terminal 43 connected to the terminal of the connecting member 21 and the electric wire W2 is attached to the holding part 24 and the terminal accommodating part 45 of the resin protector 20A. When the corners of the voltage detection terminals 37 are inserted into the recesses 27A to 27C, 28A, and 27B while passing through the through holes 27D and 28D, and the wires W1 and W2 are passed through the wire passage portion 36, battery wiring is performed. A module 20 is formed (FIG. 2).

  Next, the connection member 21 in the battery wiring module 20, the insertion holes 22, 38 </ b> A of the voltage detection terminal 37, and the insertion holes of the intermediate voltage detection terminal 43 are all electrode terminals 12 </ b> A to 12 </ b> C of the plurality of unit cells 11 (unit cell group). The battery wiring module 20 is attached to the plurality of single cells 11 in accordance with the position (FIG. 1). Then, bolts are screwed into all of the nut-shaped electrode terminals 12 </ b> A to 12 </ b> C, and the electrode-side seating surface 12 </ b> D and the electrode terminals 12 </ b> A to 12 </ b> C are connected in a press-contact state so as to be conductive.

According to the structure of the said embodiment, there exist the following effects.
(1) The battery wiring module 20 holds a plurality of connection members 21 that connect the adjacent electrode terminals 12A and 12B of the plurality of unit cells 11 having the positive and negative electrode terminals 12A and 12B, and each connection member 21. A plurality of holding portions 24, a flat plate portion 38 superimposed on the connection member 21, and a voltage detection terminal 37 connected to the electric wire W1 and an electric wire passage portion through which the electric wire W connected to the voltage detection terminal 37 is passed. 36, the drawing direction X1 of the electric wire W1 from the voltage detection terminal 37 is a direction inclined with respect to the direction Y orthogonal to the arrangement direction of the adjacent unit cells 11, and the flat plate portion 38 has a short side 38S. And the long sides 38L are alternately arranged in a rectangular shape, and the dimensions of the short sides 38S are the same as or larger than the diameter of the bolt-side seating surface 13 pressed against the flat plate portion 38. Is Characterized in was configured to have.

  According to such a configuration, since the short side 38S of the flat plate portion 38 of the voltage detection terminal 37 is shortened to have the same dimension as the diameter of the bolt-side seating surface 13 or a larger dimension than this, the voltage detection terminal Compared to the case where the flat plate portion 38 of the 37 is square (that is, the flat plate portion is constituted only by long sides), a space in the direction Y perpendicular to the arrangement direction of the adjacent unit cells 11 is secured. You don't have to. Therefore, the battery wiring module 20 can be reduced in size.

(2) The voltage detection terminal 37 has a connecting portion 39 that is connected to the short side 38S of the flat plate portion 38 and connected to the terminal portion of the electric wire W1, and the connecting portion 39 extends in the extending direction S of the short side 38S. It is good also as a structure extended in the direction (extending direction L of the long side 38L) orthogonal to it.
According to such a configuration, a space in the direction Y perpendicular to the arrangement direction of the adjacent unit cells 11 is ensured as compared with the case where the connecting portion 39 extends in a direction orthogonal to the arrangement direction of the adjacent unit cells 11. You don't have to.
(3) The wire passing portion 36 may be provided along the plurality of holding portions 24, and the extending direction of the connecting portion 39 may be directed toward the wire passing portion 36.
When the electric wire W1 connected to the connecting portion 39 is pulled out to the side opposite to the electric wire passing portion 36 side, the length of the electric wire W1 increases. However, according to this configuration, the electric wire W1 connected to the connecting portion 39 is Since the wire can be pulled out toward the wire passage portion 36, the length of the wire W1 can be shortened.

(4) The holding portion 24 is provided with a partition wall 27 that partitions the connection member 21 from the outside. Since the corner portion of the flat plate portion 38 is inserted into the partition wall 27, the corner portion of the flat plate portion 38 is separated from the partition wall 27. The battery wiring module 20 can be reduced in size by the amount of penetration.
(5) Since the recesses 27A to 27C, 28A, and 28B into which the corners of the flat plate portion 38 are fitted are formed in the partition wall 27, the battery wiring module 20 can be downsized with a simple configuration. At the same time, the voltage detection terminal 37 (detection terminal) can be positioned by the recesses 27A to 27C.

(6) Since through holes 27D and 28D (through recesses) for passing the corners of the flat plate portion 38 are formed on the inner surface of the partition wall 27, the battery wiring module 20 can be downsized with a simple configuration. And the voltage detection terminal 37 (detection terminal) can be positioned.
(7) Since the through holes 27D and 28D are through holes penetrating the partition wall 27, the battery wiring module 20 can be further downsized.

(8) The partition wall 27 is formed with an auxiliary wall 32 on the outer surface side of the partition wall 27 that covers the corners of the flat plate portion 38 that penetrates the through holes 27D and 28D.
If the flat plate portion 38 is exposed to the outside, there is a concern about the insulation, but according to the present embodiment, it is possible to prevent a decrease in insulation.
(9) The battery wiring module 20 is configured by connecting a plurality of connecting units, and each connecting unit is provided with a holding portion 24 and an electric wire passing portion 36, and is connected by connecting the connecting units. The electric wire passing part 36 in a connection unit continues.
When the battery wiring module 20 is integrally formed, a new mold or the like is required for changing the configuration (changing the length or the like) of the battery wiring module 20 in accordance with the change in the number of the cells 11. According to the above, since it is only necessary to change the connection number of the connection units according to the number of the single cells 11, the configuration of the battery wiring module 20 can be easily changed.

(10) The connecting portion 39 may be configured to be continuous with the central portion of the short side 38S in the flat plate portion 38.
According to such a configuration, it is not necessary to secure the projecting dimension S1 of the voltage detection terminal 37 toward the wire passing part 36 side. Here, the protruding dimension S1 is a dimension from the axis of the insertion hole 22 to the tip of the recess 27C in the direction Y perpendicular to the arrangement direction of the adjacent unit cells 11 (see FIGS. 3 and 4).

<Embodiment 2>
Next, Embodiment 2 of the present invention will be described with reference to FIG. In this embodiment, for the same configuration as that of the first embodiment, a sign obtained by adding 100 to the numeral portion of the sign of the first embodiment is used. The battery wiring module 120 in the present embodiment is obtained by partially changing the shape of the voltage detection terminal 37 in the first embodiment, and the other configurations are the same as those in the first embodiment. The description of the configuration, operation, and effect is omitted. That is, the voltage detection terminal 137 of the present embodiment is rectangular, like the voltage detection terminal 37 of the first embodiment, but the connection portion 139 is connected to the central portion of the long side 138L of the flat plate portion 138. Different from the first embodiment.

  According to the present embodiment, as compared with the case where the connecting portion 139 extends in the direction Y orthogonal to the arrangement direction of the adjacent unit cells 111, the protruding dimension S2 of the connecting portion 139 in the drawing direction X1 of the electric wire W1 is secured. It does not have to be. Here, the protruding dimension S2 is a dimension from the axis of the insertion hole 122 to the tip of the connecting portion 139 in the drawing direction X1 of the electric wire W1.

<Other embodiments>
The present invention is not limited to the embodiments described above with reference to the drawings, and for example, the following embodiments are also included in the technical scope of the present invention.
(1) In the said embodiment, although the connection member shall connect the electrode terminal of a different polarity (series connection), it is not restricted to this, You may connect the electrode terminal of the same polarity (parallel connection). For example, the battery module of the above embodiment and another battery module may be connected in parallel, and the same polarity electrode terminals in this parallel connection may be connected by a plurality of connection members (battery wiring modules).

(2) About the number of the single cells which comprise a battery module, it is not restricted to the number of the said embodiment, A battery wiring module can also change a shape suitably according to the number of single cells.
(3) In the above embodiment, the battery wiring module is configured by connecting a plurality of separate connection units. However, the present invention is not limited to this. For example, the battery wiring module is formed by a single (integrated) connection plate. The connecting member and the voltage detection terminal may be held by a plurality of holding portions of the connection plate.
(4) The drawing direction of the electric wire from the voltage detection terminal is not limited to the direction of the above-described embodiment, and may be inclined at least with respect to the direction Y orthogonal to the arrangement direction of the adjacent unit cells.

(5) In the above embodiment, the voltage detection terminal is provided. However, the present invention is not limited to this. For example, a current detection terminal that detects the state of the current flowing through the unit cell may be provided.
(6) In the above embodiment, the through hole through which the corner portion of the voltage detection terminal passes is provided in the partition wall. However, the present invention is not limited to this, and the inner wall side of the partition wall (does not penetrate through the partition wall). A through recess may be provided, and the corner of the voltage detection terminal may enter the through recess.

(7) In the above embodiment, although the connecting portion is provided at the short side or the central portion of the long side of the flat plate portion, according to the present invention, the connecting portion may be provided at the corner portion of the flat plate portion.
(8) In the above embodiment, the dimension of the short side is larger than the diameter of the seat surface on the bolt side. However, according to the present invention, the dimension of the short side is the same as the diameter of the seat surface on the bolt side. It may be a dimension.

(9) Although the shape of the bolt-side seating surface is circular in the above embodiment, according to the present invention, the bolt-side seating surface may be square or regular hexagonal. In this case, the maximum dimension of the seat surface on the bolt side is the dimension between the corners in the diagonal direction of the seat surface.
(10) In the above embodiment, a rectangular flat plate portion is used, but according to the present invention, a parallelogram flat plate portion may be used. Moreover, the terminal part of this invention is not limited to flat form, The thickness and shape are not ask | required.
(11) Although the electrode terminal is nut-shaped in the above embodiment, according to the present invention, the electrode terminal may be bolt-shaped such as a stud bolt. In this case, a pedestal portion is formed at the base end portion of the electrode terminal, and the upper surface of the pedestal portion becomes a seat surface on the electrode side. On the other hand, the lower surface of the nut screwed to the electrode terminal is a nut-side seating surface. Therefore, the dimension of the short side is the same dimension as the maximum dimension of the seat surface on the nut side or a dimension larger than this.

DESCRIPTION OF SYMBOLS 10 ... Battery module 11 ... Single cell 12A ... Positive electrode (electrode terminal)
12B ... Negative electrode (electrode terminal)
12D: Seat surface (on the bolt side) 20 ... Battery wiring module 21 ... Connection member 24 ... Holding part 27 ... Partition wall 27A-27C, 28A, 28B ... Recessed part 27D, 28D ... Through hole (through recessed part)
32 ... Auxiliary wall 36 ... Wire passage part 37 (37A, 37B) ... Voltage detection terminal (detection terminal)
38 ... Flat plate (terminal part)
38L ... long side 38S ... short side 39 ... connecting part L ... extending direction of long side S ... extending direction of short side S1 ... projection dimension of the voltage detection terminal toward the wire passing part side S2 ... projection dimension of the connection part W1 ... Electric wire (connected to the voltage detection terminal) X1 ... Drawing direction of the electric wire Y ... Direction perpendicular to the arrangement direction of the cells

Claims (10)

A plurality of connecting members for connecting between adjacent electrode terminals of a plurality of single cells having positive and negative electrode terminals;
A plurality of holding portions for holding the connection members;
A detection terminal connected to the electric wire, having a terminal portion superimposed on the connection member;
An electric wire passing portion through which the electric wire connected to the detection terminal is passed,
The direction in which the electric wire is drawn from the detection terminal is a direction inclined with respect to the direction orthogonal to the direction in which adjacent cells are arranged, and the terminal portion is alternately arranged with short sides and long sides in the circumferential direction. The battery wiring module, wherein the short side dimension is the same as or larger than the maximum dimension of the seating surface pressed against the terminal portion.   The detection terminal has a connection portion connected to one of the short side and the long side and connected to a terminal portion of the electric wire, and the connection portion extends in the extending direction of the one side. The battery wiring module according to claim 1, wherein the battery wiring module extends in a direction perpendicular to the battery.   The wire passing portion is provided along the plurality of holding portions, and an extending direction of the connecting portion is directed to the wire passing portion side. Battery wiring module.   The partition part which partitions off the said connection member from the exterior is provided in the said holding | maintenance part, The corner | angular part of the said terminal part has entered into this partition wall, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. The battery wiring module described in 1.   The battery wiring module according to claim 4, wherein the partition wall is formed with a recess into which a corner portion of the terminal portion is fitted.   6. The battery wiring module according to claim 4, wherein a through-hole is formed on an inner surface of the partition wall through which a corner portion of the terminal portion passes.   The battery wiring module according to claim 6, wherein the through recess is a through hole penetrating the partition wall.   The battery wiring module according to claim 7, wherein an auxiliary wall that covers a corner portion of the terminal portion that penetrates the through hole is formed on the outer surface side of the partition wall.   The battery wiring module is configured by connecting a plurality of connecting units, and each of the connecting units is provided with the wire passage portion, and the connecting units are connected to each other so that the wires in adjacent connecting units are connected. The battery wiring module according to any one of claims 1 to 8, wherein the through portions are continuous.   The battery wiring module according to any one of claims 2 to 9, wherein the connection portion is continuous with a central portion of the short side of the terminal portion.

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