JP2013054997A - Battery wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery wiring module capable of preventing defects due to expansion and contraction, and suppressing deflection in the line up direction of a holding part when attaching the battery wiring module.SOLUTION: A resin protector 33 of the battery wiring module 20 includes: a plurality of holding parts 35 for holding respective connection members 21 and arranged in a belt shape; and a connection reinforcement part 52 for connecting and reinforcing between adjacent holding parts 35 among holding parts 35, where the connection reinforcement part 52 is formed so as to be thick in the direction orthogonal to the surface of the holding parts 35 arranged in the belt shape and to be elastically deformable in the line up direction of the holding parts 35.

Description

  The present invention relates to a battery wiring module.

  A battery module for an electric vehicle or a hybrid vehicle has a plurality of cells each having a positive electrode electrode and a negative electrode terminal, and a plurality of adjacent battery cells connected by a connecting member. Single cells are connected in series.

  In the bus bar module disclosed in Patent Document 1, bus bars (connection members) are accommodated in a plurality of first accommodating portions provided side by side on a synthetic resin plate, and the bus bar module (battery wiring module) is a battery. A plurality of bus bars are integrally attached to the battery assembly by being attached to the assembly.

JP 2010-170884 A

By the way, the synthetic resin plate that houses the bus bar expands or contracts slightly depending on the ambient temperature. Therefore, it is desirable to have a configuration that absorbs expansion and contraction in order to prevent problems such as expansion and contraction due to temperature changes.
Here, the bus bar module of Patent Document 1 is provided with a first hinge having a C-shaped cross section for adjusting the positional deviation between the bus bar and the electrode between adjacent first accommodating portions. The first hinge is considered to absorb expansion and contraction due to a change in temperature to some extent.

  However, in the configuration of Patent Document 1, since there is a first hinge having a C-shaped cross section, when the bus bar module is attached to the battery assembly, each first hinge portion is elastically deformed, and the plate is connected to the bus bar. There is a problem in that it will bend in the direction as a whole. If the plate bends in the connecting direction in this way, there is a concern that the mounting operation to the battery assembly may be hindered.

  The present invention has been completed based on the above circumstances, and is a battery wiring capable of preventing problems due to expansion and contraction and suppressing bending in the direction in which the holding portions are arranged during mounting. The purpose is to provide modules.

  The present invention includes a plurality of connection members that connect between electrode terminals of adjacent unit cells in a unit cell group that includes a plurality of unit cells having positive and negative electrode terminals, and a resin protector that holds the plurality of connection members. The resin protector holds the connection members, and connects a plurality of holding portions arranged in a strip shape and adjacent holding portions among the holding portions. A connecting reinforcement portion that reinforces the plurality of holding portions, and the connection reinforcing portion is formed thick in a direction orthogonal to the band-like surfaces of the plurality of holding portions, and the arrangement direction of the plurality of holding portions It is characterized in that it is formed to be elastically deformable.

According to this configuration, since the connection reinforcing portion is configured to be elastically deformable in the direction in which the plurality of holding portions are arranged, when the resin protector expands and contracts according to a change in temperature, the plurality of holding portions The expansion and contraction in the alignment direction can be absorbed by the elastic deformation of the connection reinforcing portion. Therefore, the malfunction by expansion | swelling and shrinkage | contraction of a resin protector can be prevented.
Moreover, since the connection reinforcing part is formed thick in a direction orthogonal to the flat surfaces of the plurality of holding parts, the connection reinforcing part is not easily bent in the thick direction. Therefore, when the battery wiring module is attached to the unit cell group, the battery wiring module can be prevented from being bent in the arrangement direction of the plurality of holding portions.
Thereby, about a battery wiring module, the malfunction by expansion | swelling and shrinkage | contraction can be prevented, and it becomes possible to suppress the bending of the some holding | maintenance part at the time of attachment at the time of attachment.

The following configuration may be added as an embodiment of the present invention.
-The said connection reinforcement part is extended in the direction inclined with respect to the row direction of these holding | maintenance parts.
If it does in this way, it will become possible to simplify the composition for elastically deforming a connection reinforcement part about the sequence direction of a plurality of holding parts.

The connection reinforcing portion is bent in a mountain shape, and the direction of the mountain shape is a direction that is convex in a direction orthogonal to the arrangement direction of the plurality of holding portions.
If it does in this way, since it will become easy to elastically deform a connection reinforcement part, it will become possible to absorb expansion and contraction of a row direction of a plurality of holding parts more effectively.

The unit cell includes a battery side detection terminal for detecting the state of the unit cell, and the battery wiring module includes a module side detection terminal fastened to the battery side detection terminal by a fastening member, The resin protector has an opening into which the battery-side detection terminal is fitted, and a clearance is provided between the opening and the battery-side detection terminal fitted into the opening. Therefore, a positional deviation between the opening and the battery side detection terminal is allowed.

In the configuration in which the module side detection terminal is provided at a position different from the connection member in the battery wiring module, a fastening member is used for the battery side detection terminal provided separately from the positive electrode terminal and the negative electrode terminal of the unit cell. In this case, if the relative position between the opening of the resin protector and the module side detection terminal is completely fixed, the module side fastened to the battery side detection terminal Expansion and contraction cannot be absorbed between the detection terminal and the opening. Therefore, even if expansion and contraction are absorbed between adjacent holding parts by the connection reinforcing part, there is a concern that a problem may occur in the resin protector due to the expansion and contraction of the resin protector around the module side detection terminal.
According to this configuration, the clearance is provided between the opening and the module-side detection terminal fitted in the opening, and the positional deviation between the opening and the module-side detection terminal is allowed within the clearance. Is done. Therefore, it is possible to prevent problems due to expansion and contraction of the resin protector.

The resin protector includes a first unit having the plurality of holding portions, and a second unit connected to the first unit via the connection member, and at least one of the first unit and the second unit. One and the connection member are configured to be slidable in the direction in which the plurality of holding portions are arranged.

In the case where the first unit and the second unit of the resin protector are connected by a connecting member, both the units connected to each other by the connecting member are separated from each other. It is difficult to absorb expansion and contraction by providing a portion.
However, according to this configuration, since at least one of the first unit and the second unit and the connection member are configured to be slidable in the direction in which the plurality of holding portions are arranged, the first unit and the second unit can be changed by temperature change. Even if expansion or contraction occurs in at least one of the two units, the expansion or contraction can be absorbed by sliding movement performed between at least one of the first unit and the second unit and the connection member. Therefore, the malfunction by expansion | swelling and shrinkage | contraction of a resin protector can be prevented.

The engaged member is provided with an engaged portion, and at least one of the first unit and the second unit has a predetermined clearance in the connecting direction of the connecting member with respect to the engaged portion. An engaging portion that can be engaged is provided.
For example, when each unit is fixed to the unit cell by a portion other than the connection member, the connection member can be slid within a predetermined clearance range. Therefore, even when a dimensional error occurs, the connecting member can be moved in the connecting direction within a predetermined clearance range, so that the connecting member can be easily assembled.

The first unit and the second unit have the same shape.
If it does in this way, since the 1st unit and the 2nd unit can be made common, the metal mold for forming the 1st unit and the 2nd unit can be made common.

The battery wiring module is fixed to the single cell by inserting a rod-shaped terminal or a shaft portion of a bolt into the through hole of the connection member, and the through hole is long in the connecting direction of the connection member. Oval shape.
Since the through hole of the connecting member has an oval shape that is long in the connecting direction of the connecting member, the displacement of the electrode member or the connecting member due to the dimensional tolerance of the connecting member is absorbed and the rod-like electrode terminal or bolt is inserted into the through hole of the connecting member. It is possible to insert the shaft portion.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to prevent the malfunction by expansion | swelling and shrinkage | contraction about a battery wiring module, and to suppress the bending of the arrangement | positioning direction of a holding | maintenance part in the case of attachment.

The top view which abbreviate | omitted and represented about the battery module 10 with which the battery wiring module 20 which concerns on Embodiment 1 was attached AA sectional view of FIG. BB sectional view of FIG. Plan view showing multiple cells Plan view showing the battery wiring module The figure which shows the clearance between a notch part and an engagement convex part Rear view showing enlarged battery wiring module Plan view showing connecting member Plan view showing resin protector A plan view showing the first unit and the second unit The figure which expanded and showed the circumference of the connection reinforcement part of the 1st unit The figure which expanded and showed the circumference of the connection reinforcement part of the 1st unit concerning Embodiment 2.

<Embodiment 1>
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the battery wiring module 20 of the present embodiment is attached to a unit cell group in which a plurality of unit cells 11 are arranged to constitute a battery module 10. For example, it is used as a drive source for an electric vehicle or a hybrid vehicle. In the following, the upper and lower directions will be described with reference to FIG. 2, and the front and rear directions will be described with the lower side of FIG.

(Battery module)
The battery module 10 includes a plurality of single cells 11 (single cell group) arranged side by side and a battery wiring module 20 that is integrally attached to the plurality of single cells 11.
As shown in FIG. 4, in the unit cell 11, the terminal portion 12 projects vertically from the end face of a rectangular parallelepiped main body portion in which a power generation element (not shown) is accommodated.

The terminal portion 12 includes electrode terminals 12A and 12B (shown as a positive electrode 12A and a negative electrode 12B) provided on the front and rear sides and a battery-side detection terminal 12C disposed in an intermediate portion between the electrode terminals 12A and 12B.
The electrode terminals 12A and 12B and the battery-side detection terminal 12C are both nuts having a screw hole 15 in the center, and are made of a metal conductor 13 and a resin part 14 surrounding the conductor 13 in the circumferential direction. The rectangular conductor part 13 protrudes from the resin part 14 in the upper end part (front-end | tip part).

  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).

(Battery wiring module)
As shown in FIG. 5, the battery wiring module 20 includes a plurality of connecting members 21 that connect between the electrode terminals 12 </ b> A and 12 </ b> B that are adjacent to each other on the left and right sides, and are connected to the terminal portions of the electric wires W so as to overlap each connecting member 21. A plurality of voltage detection terminals 24 that detect the voltage of the battery 11 and a plurality of voltage detection terminals 28 that are connected to the terminal portion of the electric wire W and detect an intermediate voltage between the electrode terminals 12A and 12B (in the configuration of the present invention. An example of “module side detection terminal”, and a resin protector made of a synthetic resin that is configured by connecting the first unit 34 and the second unit 63 side by side and holds the connecting member 21, the voltage detection terminal 24, and the voltage detection terminal 28. 33.

(Connecting member)
The connecting member 21 is made of a metal such as copper, copper alloy, stainless steel (SUS), or aluminum, and has a plate shape with a length corresponding to the dimension between the adjacent electrode terminals 12A and 12B as shown in FIG. A pair of through-holes 22 through which shaft portions of bolts (not shown) as fastening members are inserted (communication with the screw holes 15 of the electrode terminals 12A and 12B) are formed.
The shape of the through hole 22 is an oval shape that is long in the left-right direction (connection direction of the wire connecting portion 31 material).

At the side edge in the connection direction of the connection member 21, a cutout portion 23 is formed by cutting out the side edge in a rectangular shape that is long in the front-rear direction (formed by narrowing the width dimension of the connection member 21 in a step shape). Are formed on both sides of the through hole 22, respectively.
Here, as shown in FIG. 5, of the plurality of connection members 21, the connection member 21 </ b> A located at the boundary between the first unit 34 and the second unit 63 is not only connected between the electrode terminals 12 </ b> A and 12 </ b> B, The first unit 34 and the second unit 63 are connected to each other, and the cutout portion 23 provided in the connection member 21A is an example of the “engaged portion” that is the configuration of the present invention.

(Voltage detection terminal)
The voltage detection terminal 24 is provided to detect the voltage of the electrode terminals 12A and 12B of the unit cell 11, and the insulation coating is stripped and exposed at the end of the electric wire W behind the rectangular plate-like portion 25. A crimping portion 26 to which the conductor is crimped is provided.
A through hole 27 is formed through the center of the plate-like portion 25.

(Voltage detection terminal)
The voltage detection terminal 28 is for detecting the voltage of the middle part of the unit cell 11, and, as shown in FIG. 3, a flat plate portion 29 placed on the battery side detection terminal 12C, and a flat plate It consists of an electric wire connecting portion 31 connected to the right end of the portion 29 and connected to the end of the electric wire W, and a locked piece 32 connected to the left end of the flat plate portion 29.

The flat plate portion 29 is a portion placed on the upper surface of the conductor portion 13 of the battery side detection terminal 12C, is a rectangular shape having an area smaller than the plate-like portion 25 of the voltage detection terminal 24, and has a bolt at the center. A circular through hole 30 that can be inserted through the shaft portion passes therethrough.
The electric wire connection part 31 is formed in a step-like high position from the flat plate part 29, and peels off the insulation coating of the end of the electric wire W, and crimps the exposed conductor and the insulation coating of the electric wire W. And an insulation barrel.

  The locked piece 32 is formed in a step-like shape at the same height as the wire connecting portion 31 from the flat plate portion 29, has a bowl shape, and has a width dimension reduced from both sides in the extending direction of the flat plate portion 29. It is formed with.

  Both the electric wires W connected to the voltage detection terminal 28 and the voltage detection terminal 24 are collected in an electric wire passage groove portion 62 of the resin protector 33 described later and guided to a battery ECU (not shown) on the right side. The battery ECU is equipped with a microcomputer, an element, and the like, and has a function for detecting voltage, current, temperature, etc. of the unit cells 11 and controlling charge / discharge of each unit cell 11. Of the configuration.

(Resin protector)
The resin protector 33 has a generally flat shape as a whole. As shown in FIG. 10, the resin protector 33 includes a first unit 34 and a second unit 63 arranged at a position continuous in the left-right direction with respect to the first unit 34. The first unit 34 and the second unit 63 are connected via the connection member 21.

(First unit)
The first unit 34 is made of synthetic resin and has a crank shape in which the front end side protrudes in a step shape to the right of the rear end side and the rear end side protrudes in a step shape to the left of the front end side.
The first unit 34 holds the connection members 21 and connects a plurality of holding portions 35 provided in two rows in the left-right direction in a strip shape, and a connection reinforcing portion 52 that connects the holding portions 35 adjacent to the left and right. And a detection accommodating portion 53 that is provided side by side in the front-rear direction of the first unit 34 and accommodates the voltage detection terminal 28, and is provided between the holding portion 35 and the detection accommodating portion 53, and the electric wire W is passed therethrough. And an electric wire passage groove portion 62.

(Holding part)
The holding part 35 is provided at the end of the first holding unit 34 that houses the connecting member 21 and the first unit 34 that is connected to the left and right of the holding part 36, and the end that holds one side in the connecting direction of the connecting member 21 </ b> A. And holding unit 46.

As shown in FIG. 2, the housing and holding unit 36 includes a bottom plate 37 on which the connection member 21 is placed, and a rectangular tubular partition wall 41 that surrounds the connection member 21.
The bottom plate 37 includes an intermediate support plate 38 that connects the base end portions of the front and rear partition walls 41 at an intermediate portion in the width direction, and an edge plate 39 provided at an end portion in the left-right direction across the opening 40.
The opening 40 has a rectangular shape that allows the electrode terminals 12A and 12B to enter.

The partition wall 41 stands in an annular shape around the connection member 21 at a height at which contact of the tool or the like is prevented in order to prevent a tool or the like from contacting the electrode terminals 12A and 12B and the connection member 21 and short-circuiting. It is installed.
The annular partition wall 41 is formed in a rectangular tube shape by connecting a pair of front and rear opposing walls extending in the left-right direction and a pair of left and right side walls extending in the front-rear direction.

The partition wall 41 (each opposing wall) is provided with a bending piece 44 that can be bent and deformed in the front-rear direction so as to be able to regulate the detachment of the connection member 21. By disposing the connection member 21 on the lower side of the portion protruding inward of the bending piece 44, the detachment of the connection member 21 is restricted.
Moreover, as shown in FIG. 11, the partition wall 41 is provided with a recess 42 into which a corner portion of the flat plate portion 29 of the voltage detection terminal 28 is fitted from above.

  In addition, a through groove 45 through which the electric wire connecting portion 31 of the voltage detection terminal 28 is passed is recessed at a position including the corner portion of the partition wall 41 in the holding portion 35. The through groove 45 is formed with a pair of clamping pieces 43 that clamp the wire connection portion 31 of the voltage detection terminal 28 from both sides. The through-groove 45 is provided at a corner of the holding portion 35 on the side of the wire-passing groove 62 so as to communicate (join) with the wire-passing groove 62 from an oblique direction. The outer surface 45A of the groove wall has a shape inclined at a predetermined angle with respect to the left-right direction.

As shown in FIG. 10, the end holding portions 46 are respectively provided at the four corner positions of the first unit 34, and the bottom plate 47 on which one end side of the connecting member 21A is placed and the one end side of the connecting member 21A are provided. And a partition wall 48 surrounding from three sides.
The bottom plate 47 is formed in a shape that allows the bottom plate 47 of the second unit 63 to be fitted to the bottom plate 47 of the first unit 34 from above or below.

The partition wall 48 is set to a height at which a tool or the like can be prevented from coming into contact with the connection member 21 or a bolt and short-circuiting, and a pair of opposed walls facing each other in front and rear, and a side wall connected to the pair of opposed walls And one side facing the side wall is open.
As shown in FIG. 6, each opposing wall is provided with a holding piece 49 for holding the connection member 21 </ b> A in the end holding portion 46 (on the bottom plate 47 side).

  The holding piece 49 is formed inside the notch by providing a U-shaped notch in the partition wall 48. The holding piece 49 has a shape in which the protruding dimension increases in an inclined shape (claw shape) toward the bottom plate 47 side, and the tip end side of the claw of the holding piece 49 is positioned above the edge of the connection member 21A. The connecting member 21 </ b> A is locked between the lower end of the holding piece 49 and the bottom plate 47.

  The locking force of the connecting member 21A by the holding piece 49 is such that the sliding movement in the connecting direction of the connecting member 21A is allowed, and the sliding movement is performed against the force by which the holding piece 49 presses the connecting member 21A. Alternatively, it may be possible to form a slight gap between the holding piece 49 and the connection member 21A (without causing a pressing force) to be slidable. Note that an auxiliary wall 51 that covers the cutout portion is formed integrally with the partition wall 48 on the outside of each holding piece 49.

  Inside the partition wall 48 (opposite wall), engaging with the notch 23 of the connecting member 21A allows the connecting member 21A to move in the left-right direction within a predetermined range (locks over a predetermined range). The joint convex part 50 (an example of the "engagement part" which is the structure of this invention) is provided.

The engaging convex part 50 protrudes in a rectangular shape from the base end part of each opposing wall inward at a position corresponding to the notch part 23 of the connecting member 21A. The vertical position of the engaging protrusion 50 is the same as the cutout 23 of the connecting member 21.
Here, the length of the engaging protrusion 50 in the left-right direction (connection direction of the connecting member 21) is smaller than the length of the notch 23 in the left-right direction. Specifically, the size of the notch 23 is a size obtained by adding predetermined clearances CL1 and CL2 before and after the engaging convex portion 50.

  As described above, when the notch 23 and the engaging protrusion 50 are engaged, the connecting member 21A is slidable in the left-right direction within the clearance range with respect to the first unit 34 and the second unit 63. . Thus, the dimensional error that may occur when the first unit 34 or the second unit 63 is attached to the plurality of single cells 11 is caused by the sliding movement between the first unit 34 or the second unit 63 and the connection member 21. It is possible to absorb.

(Connection reinforcement)
The connection reinforcing portion 52 extends in a direction inclined at a predetermined angle with respect to the left-right direction, and connects the holding portions 35 (partition walls 41, 48) adjacent to the left and right.
As shown in FIG. 7, the dimension of the connection reinforcing portion 52 in the vertical direction (the direction perpendicular to the surface of the plurality of holding portions 35 arranged in a strip shape) is equal to the height of the partition walls 41 and 48. Thus, the partition walls 41 and 48 are formed so as to be continuous with each other.

As shown in FIG. 11, the thickness of the connection reinforcing portion 52 in the front-rear direction is a thin dimension that enables elastic deformation in the left-right direction.
The inclination angle of the connection reinforcing portion 52 with respect to the left-right direction is slightly smaller than 45 degrees and is an angle parallel to the outer surface 45A of the groove wall of the through groove 45.
Here, when the connecting member 21 is bolted and fixed to the electrode terminals 12A and 12B, the bottom plate 37 is pressed against the connecting member 21, and the relative position between the bottom plate 37 and the electrode terminals 12A and 12B is increased. It is fixed (see FIG. 2). Therefore, when the resin protector 33 expands and contracts due to a change in ambient temperature, the force due to the expansion and contraction extends between the adjacent holding portions 35. However, according to the present embodiment, since the connection reinforcing portion 52 can be elastically deformed in the left-right direction, the force due to expansion and contraction of the resin protector 33 extending between the adjacent holding portions 35 is applied to the connection reinforcing portion 52. Can be absorbed by elastic deformation.

(Detection storage)
The plurality of detection accommodating portions 53 are provided side by side in the middle portion in the front-rear direction of the resin protector 33, and each detection accommodating portion 53 is a partition that separates the voltage detection terminal 28 from the outside as shown in FIG. 54, an opening 56 into which the flat plate portion 29 of the voltage detection terminal 28 is fitted, and a locking portion 57 to which the locked piece 32 of the voltage detection terminal 28 is locked.

The partition wall 54 is provided with through portions 55 that divide the partition wall 54 and alternately guide the electric wires W to the front and rear wire passage groove portions 62 for the detection housing portions 53 arranged side by side.
The opening 56 opens in a rectangular shape according to the shape of the flat plate portion 29 of the voltage detection terminal 28, and the size of the opening 56 is larger than the upper surface of the conductor portion 13 of the battery side detection terminal 12C. It is smaller than the entire upper surface including the resin portion 14 of the side detection terminal 12C.

The locking portion 57 is provided at a position higher than the opening portion 56 on the left side of the opening portion 56, and has a locking hole 58. The locked piece 32 is vertically moved in the locking hole 58. It can be moved within a predetermined range.
Thus, before the battery wiring module 20 is attached to the unit cell 11, the locked piece 32 is hooked and locked below the locking hole 58. When the battery wiring module 20 is attached to the unit cell 11, the battery side The flat plate portion 29 comes into contact with the conductor portion 13 of the detection terminal 12C and the voltage detection terminal 28 is lifted, and the locking piece floats (separates) from the lower side of the locking hole 58 within the range of the size of the locking hole 58.

  When the flat plate portion 29 is bolted, the voltage detection terminal 28 is fixed to the battery side detection terminal 12C of the unit cell 11. On the other hand, on the first unit 34 side, a slight clearance is provided between the flat plate portion 29 of the voltage detection terminal 28 and the opening 56 of the detection accommodating portion 53. Therefore, the voltage detection terminal 28 is within this clearance range. And relative movement between the first unit 34 is allowed. That is, the voltage detection terminal 28 is not fixed with respect to the detection housing portion 53, and the positional deviation in the front-rear and left-right directions is allowed with respect to the unit cell 11 according to the clearance between the voltage detection terminal 28 and the opening 56.

  A positioning portion 59 that protrudes in a square frame shape is provided around the opening 56 on the back side of the detection housing portion 53, and this positioning portion 59 is the upper end portion of the voltage side detection terminal 12 </ b> C of the unit cell 11. The first unit 34 is positioned with respect to the unit cell 11 by being fitted into (the reference position of the first unit 34 with respect to the unit cell 11 is determined).

  As shown in FIG. 10, the left end portion connected to the detection housing portion 53 of the units 34 and 63 is provided with a fitting convex portion 60 protruding leftward (connection direction), and the detection of the units 34 and 63. A fitting concave portion 61 that fits with the fitting convex portion 60 of the adjacent units 34 and 63 is provided at the right end portion connected to the housing portion 53.

  The fitting projections 60 are both rod-shaped members and have a flat shape that is thick in the vertical direction and thin in the front-rear direction. The fitting recess 61 is formed with a depth and a size that allow the fitting protrusion 60 to be fitted by inserting the fitting protrusion 60 until the tip hits.

The wire passage groove portions 62 are provided on the front and rear sides of the detection housing portion 53 so as to follow the detection housing portions 53 arranged on the left and right sides, and when the first unit 34 and the second unit 63 are connected to each other, The groove part 62 continues. A pair of electric wire holding claws are arranged opposite to each other at the opening end of the electric wire passage groove 62, and the electric wire W is prevented from being detached from the electric wire passage groove 62.
Since the second unit 63 has the same shape as the first unit 34, the second unit 63 is denoted by the same reference numeral as the first unit 34 and description thereof is omitted. Of the first unit 34 and the second unit 63 constituting the resin protector 33, the first unit 34 and the second unit 63 arranged at the end of the connection are connected to other units on one end side. Is not necessary, and the first units 34 and 63 arranged other than the end portions have different shapes.

Next, assembly of the battery wiring module 20 will be described.
The resin protector 33 is formed by alternately connecting the first units 34 and the second units 63 (FIG. 9).
Next, while holding the connection member 21 in each holding part 35, each voltage detection terminal 24 connected to the terminal of the electric wire W is mounted on each connection member 21 so as to be overlapped, and each voltage detection terminal is connected to each detection accommodating part 53. 28 is accommodated.
When the mounting of all the voltage detection terminals 28 is completed, the battery wiring module 20 is formed.

Next, with respect to the plurality of unit cells 11, the battery wiring module 20 is lifted so that the positioning portions 59 provided on the back sides of the units 34 and 63 are positioned at the battery side detection terminals 12 </ b> C of the plurality of unit cells 11.
At this time, since the connection reinforcing portion 52 provided between the holding portions 35 is formed thick in the vertical direction, the battery wiring module 20 is orthogonal to the surface of the plurality of holding portions 35 arranged in a strip shape. The rigidity in the direction is maintained, and the bending of the holding portion 35 is suppressed.
When the battery wiring module 20 is positioned at the positioning portion 59, even if an error occurs in the distance between the terminals for voltage detection, which serves as a positioning reference, due to variations in the dimensional accuracy of the unit cells 11, the engagement convex portion 50 The first unit 34 and the second unit 63 can be slid relative to the left and right by an amount corresponding to the clearance generated by the notch 23.

After positioning the resin protector 33 at the reference position, the shaft portion of the bolt is passed through the through hole 22 of each connection member 21, and the connection member 21 is bolted between the electrode terminals 12A and 12B. At this time, since the through hole 22 has an oval shape that is long in the left-right direction, the error in the dimensional accuracy between the electrode terminals 12A and 12B can be absorbed by the oval through hole 22, and the bolt Tightening can be performed reliably.
And it becomes the battery module 10 by fastening through the axial part of a volt | bolt to the through-holes 22, 27, and 30 of the connection member 21, the voltage detection terminal 24, and the voltage detection terminal 28 (FIG. 1).

According to the structure of the said embodiment, there exist the following effects.
(1) A plurality of connection members 21 for connecting between the electrode terminals 12A, 12B of adjacent unit cells 11 in a unit cell group composed of a plurality of unit cells 11 having positive and negative electrode terminals 12A, 12B, and a plurality of connections A battery wiring module 20 having a resin protector 33 for holding a member 21, wherein the resin protector 33 holds each connection member 21, a plurality of holding portions 35 arranged in a strip shape, and a plurality of holding portions 35, a connecting reinforcing portion 52 that connects and reinforces adjacent holding portions 35 and reinforces the connecting reinforcing portion 52 in a vertical direction (a direction orthogonal to a surface of the plurality of holding portions 35 arranged in a strip shape). And is formed to be elastically deformable in the left-right direction (the direction in which the plurality of holding portions 35 are arranged).

  According to the present embodiment, the connection reinforcing portion 52 is configured to be elastically deformable in the direction in which the plurality of holding portions 35 are arranged. Therefore, when the resin protector 33 expands and contracts according to a change in temperature, a plurality of connection reinforcing portions 52 are provided. It is possible to absorb expansion and contraction of the holding portions 35 in the arrangement direction by elastic deformation of the connection reinforcing portion 52. Therefore, problems due to expansion and contraction of the resin protector 33 can be prevented.

Moreover, since the connection reinforcement part 52 is formed thickly in the direction orthogonal to the surface of the plurality of holding parts 35 arranged in a strip shape, the connection reinforcement part 52 is not easily bent in this thick direction. Therefore, it is possible to prevent the battery wiring module 20 from being bent in the direction in which the holding portions 35 are arranged when the battery wiring module 20 is attached to the unit cell group.
Thereby, about the battery wiring module 20, it becomes possible to prevent the malfunction by expansion | swelling and shrinkage | contraction and to suppress the bending of the holding | maintenance part 35 at the time of attachment in the case of attachment.

(2) The connection reinforcing portion 52 extends in a direction inclined with respect to the arrangement direction of the plurality of holding portions 35.
In this way, it is possible to simplify the configuration for elastically deforming the connection reinforcing portion 52 in the direction in which the plurality of holding portions 35 are arranged.

(3) The unit cell 11 includes a battery side detection terminal 12C for detecting the state of the unit cell 11, and the battery wiring module 20 is voltage detection that is fastened to the battery side detection terminal 12C by a fastening member. The resin protector 33 includes a terminal 28 (module side detection terminal), and the resin protector 33 includes an opening 40 into which the battery side detection terminal 12C is fitted, and between the opening 40 and the battery side detection terminal 12C fitted into the opening 40. A clearance is provided, and a positional deviation between the opening 40 and the battery-side detection terminal 12C is allowed within this clearance range.

  In the configuration in which the voltage detection terminal 28 is provided at a position different from the connection member 21 in the battery wiring module 20, the battery side detection in which the voltage detection terminal 28 is provided separately from the positive electrode terminals 12 A and 12 B of the unit cell 11. Although it can be set as the structure fastened to a terminal 12C using a fastening member, in this case, if the relative position between the opening 40 of the resin protector 33 and the voltage detection terminal 28 is completely fixed, the battery Expansion and contraction cannot be absorbed between the voltage detection terminal 28 fastened to the side detection terminal 12 </ b> C and the opening 40. Therefore, even if the expansion / contraction is absorbed between the holding portions 35 adjacent to each other by the connection reinforcing portion 52, there is a concern that the resin protector 33 may malfunction due to the expansion / contraction of the resin protector 33 around the voltage detection terminal 28. Is done.

  According to the present embodiment, a clearance is provided between the opening 40 and the voltage detection terminal 28 fitted in the opening 40, and the gap between the opening 40 and the voltage detection terminal 28 is within this clearance range. Misalignment is allowed. Therefore, it is possible to prevent problems due to expansion and contraction of the resin protector 33.

(4) The resin protector 33 includes a first unit 34 having a plurality of holding portions 35 and a second unit 63 connected to the first unit 34 via the connection member 21, and the first unit 34 and the second unit 34. At least one of the units 63 and the connection member 21 are configured to be slidable in the direction in which the holding portions 35 are arranged.
In the case where the first unit 34 and the second unit 63 of the resin protector 33 are connected by the connecting member 21, the boundary between the units 34 and 63 connected by the connecting member 21 is the both units 34. 63 are separated, it is difficult to absorb expansion and contraction by providing the connection reinforcing portion 52.

  However, according to the present embodiment, at least one of the first unit 34 and the second unit 63 and the connection member 21 are configured to be slidable in the direction in which the holding portions 35 are arranged. Even if expansion or contraction occurs in at least one of 34 and the second unit 63, the expansion and contraction are absorbed by the slide movement performed between at least one of the first unit 34 and the second unit 63 and the connection member 21. It becomes possible. Therefore, problems due to expansion and contraction of the resin protector 33 can be prevented.

(5) The connection member 21 is provided with a notch 23 (engaged portion), and at least one of the first unit 34 and the second unit 63 has a connection direction of the connection member 21 with respect to the notch 23. An engagement convex portion 50 (engagement portion) that can be engaged with a predetermined clearance is provided.
For example, when the units 34 and 63 are fixed to the unit cell 11 by a portion other than the connection member 21, the connection member 21 can be slid within a predetermined clearance range. Therefore, even if a dimensional error occurs, the connecting member 21 can be moved in the connecting direction within a predetermined clearance range, so that the assembling work of the connecting member 21 can be facilitated.

(6) The first unit 34 and the second unit 63 have the same shape.
In this way, since the first unit 34 and the second unit 63 can be shared, the molds for forming the first unit 34 and the second unit 63 can be shared.

(7) The battery wiring module 20 is fixed to the unit cell 11 by inserting a shaft portion of a bolt into the through hole 22 (through hole) of the connection member 21, and the through hole 22 is connected to the connection member 21. It has a long oval shape in the direction.
Since the through hole 22 of the connecting member 21 has an oval shape that is long in the connecting direction of the connecting member 21, it absorbs misalignment between the electrode terminals 12 </ b> A and 12 </ b> B and the dimensional tolerance of the connecting member 21. The rod-shaped electrode terminals 12A and 12B or the shaft portion of the bolt can be inserted into 22.

<Embodiment 2>
The second embodiment of the present invention will be described below with reference to FIG. In the second embodiment, the connection reinforcing portion 70 is formed in a mountain shape. In the following, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
The connection reinforcement part 70 is L-shaped, and connects the same positions in the front-rear direction among the partition walls 41 and 48. This connection reinforcement part 70 can be elastically deformed in the left-right direction, and is formed from the lower end to the upper end of the partition walls 41, 48 in the up-down direction.

  Since the direction of the mountain shape of the connection reinforcing portion 70 is a direction that protrudes in a direction orthogonal to the arrangement direction of the holding portions 35, the connection reinforcement portion 70 is easily elastically deformed, and the expansion of the holding portions 35 in the arrangement direction is The contraction can be absorbed more effectively.

<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 vertical dimension of the connection reinforcing portions 52, 70 is the same as the vertical dimension of the partition walls 41, 48, but is not limited to this, and at least the vertical direction (a plurality of holding portions) It is only necessary that the connection reinforcing portion 52 be formed thick in the vertical direction to such an extent that the rigidity to the extent that it does not bend in a direction orthogonal to the surface of the 35 strips is secured. Further, the thickness in the front-rear direction of the connection reinforcing portions 52 and 70 is not limited to the thickness of the above-described embodiment, and a thickness that can be elastically deformed in the left-right direction while securing rigidity in the up-down direction can be appropriately set. it can.

(2) The inclination angle of the connection reinforcing part 52 with respect to the arrangement direction of the plurality of holding parts 35 is not limited to the inclination angle of the first embodiment, and can be set as appropriate according to the degree of elastic deformation.
(3) In the above embodiment, the connecting member 21 connects the electrode terminals 12A and 12B of different polarities (in series connection), but is not limited thereto, and connects the electrode terminals 12A and 12B of the same polarity (parallel). Connection). For example, another unit cell 11 may be connected in parallel to the battery module 10 of the above embodiment, and the electrode terminals 12A and 12B having the same polarity in this parallel connection may be connected by a plurality of connection members 21.

(4) The number of the single cells 11 constituting the battery module 10 is not limited to the number of the above-described embodiments, and the shape of the battery wiring module 20 can be appropriately changed according to the number of the single cells 11.
(5) In the above-described embodiment, the battery wiring module 20 is configured by connecting the first unit 34 and the second unit 63. However, the present invention is not limited to this. For example, a plurality of (single) connection plates are used. A battery wiring module having the holding portion 35 may be configured.

(6) In the above embodiment, the battery wiring module 20 is provided with the voltage detection terminal 28 in addition to the voltage detection terminal 24, and the resin protector 33 has a flat shape as a whole. It may not be provided. In other words, a resin protector (without the detection accommodating portion 53) may be configured by a plurality of holding portions 35 arranged in a belt shape.
(7) In the above embodiment, the battery module 10 is formed by bolting the nut-shaped electrode terminals 12A and 12B. However, the present invention is not limited to this, and the electrode terminal from which the rod-shaped shaft portion protrudes is a fastening member. It is good also as a structure which forms the battery module 10 by fastening using a certain nut.

DESCRIPTION OF SYMBOLS 10 ... Battery module 11 ... Single cell 12 ... Terminal part 12A, 12B ... Electrode terminal 12C ... Battery side detection terminal 20 ... Battery wiring module 21 (21A) ... Connection member 23 ... Notch part (engaged part)
24 ... Voltage detection terminal 28 ... Voltage detection terminal (module side detection terminal)
DESCRIPTION OF SYMBOLS 29 ... Flat plate part 31 ... Electric wire connection part 32 ... Locked piece 33 ... Resin protector 34 ... 1st unit 35 ... Holding part 36 ... Storage holding part 37, 47 ... Bottom plate 40, 56 ... Opening part 41, 48 ... Partition wall 45 ... Through groove 46 ... End holding part 49 ... Holding piece 50 ... Engaging convex part (engaging part)
52, 70 ... connection reinforcing part 53 ... detection accommodating part 57 ... locking part 58 ... locking hole 60 ... fitting convex part 61 ... fitting concave part 62 ... electric wire passage groove part 63 ... second unit W ... electric wire

Claims (8)

A plurality of connection members that connect between the electrode terminals of adjacent unit cells in a unit cell group that includes a plurality of unit cells having positive and negative electrode terminals, and a resin protector that holds the plurality of connection members. A battery wiring module,
In the resin protector,
A plurality of holding portions that hold the connection members and are arranged in a strip shape;
A connection reinforcing portion for connecting and reinforcing adjacent holding portions among the plurality of holding portions;
The connection reinforcing portion is formed to be thick in a direction orthogonal to the belt-like surfaces of the plurality of holding portions and is formed to be elastically deformable in the arrangement direction of the plurality of holding portions. Wiring module. The battery wiring module according to claim 1, wherein the connection reinforcing portion extends in a direction inclined with respect to an arrangement direction of the plurality of holding portions. 3. The battery according to claim 1, wherein the connection reinforcing portion is bent in a mountain shape, and the direction of the mountain shape is a direction that is convex in a direction orthogonal to the arrangement direction of the plurality of holding portions. Wiring module. The unit cell includes a battery side detection terminal for detecting the state of the unit cell,
The battery wiring module includes a module side detection terminal fastened by a fastening member to the battery side detection terminal,
The resin protector has an opening into which the battery-side detection terminal is fitted, and a clearance is provided between the opening and the battery-side detection terminal fitted into the opening. 4. The battery wiring module according to claim 1, wherein a positional deviation between the opening and the battery-side detection terminal is allowed. The resin protector includes a first unit having the plurality of holding portions, and a second unit connected to the first unit via the connection member,
5. The structure according to claim 1, wherein at least one of the first unit and the second unit and the connection member are configured to be slidable in an arrangement direction of the plurality of holding portions. Battery wiring module. The connecting member is provided with an engaged portion, and at least one of the first unit and the second unit has a predetermined clearance in the connecting direction of the connecting member with respect to the engaged portion. The battery wiring module according to claim 5, further comprising an engaging portion that can be engaged. The battery wiring module according to claim 5 or 6, wherein the first unit and the second unit have the same shape. The battery wiring module is fixed to the unit cell by inserting a rod-shaped terminal or a shaft portion of a bolt into the through hole of the connection member, and the through hole is long in the connection direction of the connection member. The battery wiring module according to any one of claims 1 to 7, wherein the battery wiring module has a circular shape.

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