JP5648609B2 - Battery wiring module - Google Patents

Description

  The present invention relates to a battery wiring module.

  In battery modules for electric vehicles and hybrid vehicles, a plurality of single cells having positive and negative electrode terminals are arranged side by side. In such a battery module, the adjacent positive electrode terminal (positive electrode terminal) and negative electrode terminal (negative electrode terminal) are connected to each other by a bus bar held on a synthetic resin substrate portion, for example. Single cells are electrically connected.

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

JP 2011-65863 A

  In this type of battery module, the battery wiring module is assembled into a single cell group and the adjacent electrode terminals are electrically connected to each other, and then the electrode terminals and the conductive connection members are insulated from other parts, tools, and the like. In order to prevent the electric wire from protruding and the like, the battery wiring module is covered with an insulating cover.

  When such a cover is provided separately from the battery wiring module, the number of parts increases, and after the battery wiring module is assembled to the unit cell group, the cover is aligned with a predetermined position of the battery wiring module and locked. There is a problem that work to be performed is required, which leads to an increase in work man-hours.

  On the other hand, in order to reduce the number of parts, a configuration in which the cover is integrated with the substrate portion of the battery wiring module via, for example, a hinge structure is conceivable. However, when the cover and the substrate part are integrated in this way and configured as a single part, the mold becomes large, so it is costly or the molding conditions are relatively strict and the yield is reduced. There is. In order to reduce the size of the mold, a configuration in which the battery wiring module is combined with a plurality of connecting units, and a configuration in which a cover of a size covering each connecting unit is integrally provided in each connecting unit is also conceivable. In this case, after the battery wiring module is attached to the unit cell group, the plurality of covers must be individually closed and locked, which is problematic.

  The present invention has been completed based on the above situation, and an object of the present invention is to provide a battery wiring module that can easily handle and open / close a cover that covers an electrode terminal.

The present invention made in order to solve the above-mentioned problems is a battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged, and is electrically connected between the electrode terminals. A resin protector that holds a path, and the resin protector provided with a lid portion made of an insulating material that covers the electrode terminal, the resin protector is configured by connecting a plurality of connecting units, The lid portion is provided integrally with at least one of the plurality of connecting units in advance, and has a mounting portion that can be attached to at least one of the other connecting units, and the resin. There is an engaging part that is located on the opposite side of the hinge part and engages with the connecting unit, and the attachment part is connected to the other connecting unit. It is characterized in that it can be engaged with the connecting unit by the engaging portion by attaching to and closing at least one of the connecting members.

According to the present invention, the lid is integrally provided in advance in at least one of the plurality of connecting units, so that the positioning operation of the lid with respect to the assembled connecting unit (resin protector) is simplified. Workability is improved. Further, from being attachable lid through the resin hinge portions to at least one of the other of the connection unit, against the pre lid in the resin protector before attaching the battery wiring module in cell group Te by previously attaching the mounting portion of the resin hinge portions, after attaching the battery wiring module in cell group at the attachment site of the battery wiring module, to lock the engaging portion of the lid portion is rotated by the resin hinge portions With this simple operation, the lid can be closed smoothly.

In addition, since the resin protector is configured by connecting a plurality of connecting units, the mold does not become too large even if the lid is integrally provided in advance in one of the connecting units.

  According to the present invention, it is possible to provide a battery wiring module that can easily handle and open / close a cover that covers an electrode terminal.

The top view of the battery wiring module of the open state of one Embodiment of this invention Similarly, exploded plan view of the battery wiring module Front view of the battery wiring module in the same open state Side view of the battery wiring module in the same open state Top view of the battery wiring module in the same closed state Front view of the battery wiring module in the same closed state Side view of the battery wiring module in the same closed state

  A battery wiring module 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7.

The battery wiring module 10 of the present embodiment is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and constitutes a part of a battery module (not shown) used as a power source for driving the vehicle. These are attached to a unit cell group in which a plurality of unit cells each having a positive electrode and a negative electrode terminal and a voltage detection connection terminal are arranged to electrically connect adjacent unit cells.
In addition, in the following description, about the some same member, a code | symbol may be attached | subjected to one member and a code | symbol may be abbreviate | omitted about another member.

(Single cell)
The unit cell (not shown) has a flat, substantially rectangular parallelepiped shape, and on the upper surface thereof, the above-described pair of positive and negative electrode terminals and a voltage detection connection terminal provided therebetween are arranged in a row in the longitudinal direction. It is provided side by side. The electrode terminal is provided in the shape of a hole having a screw portion that can be screwed with a screw thread of a bolt for connecting to a bus bar 40 described later. The voltage detection connection terminal is also provided in the shape of a hole having a screw portion that can be screwed with a screw thread of a bolt for connecting to a second voltage detection terminal 55 described later. The connection terminal has a smaller diameter than the positive electrode terminal and the negative electrode terminal.
The unit cells are arranged such that adjacent electrode terminals have different polarities to form a unit cell group, and are fixed by a holding plate.

(Battery wiring module 10)
The battery wiring module 10 includes a plurality of metal bus bars 40 connected to the positive and negative electrode terminals of adjacent unit cells, and a first voltage detection terminal 50 that is overlapped and electrically connected to the bus bars 40. The second voltage detection terminal 55 connected to the voltage detection connection terminal provided in the unit cell, the bus bar holding part 20 holding the bus bar 40, and the detection terminal holding part holding the second voltage detection terminal 55 A resin protector 11 made of synthetic resin having 22, a detection electric wire (not shown) connected to the first and second voltage detection terminals 50 and 55, a lid 30 covering the open surface of the resin protector 11, Is provided.

(Bus bar 40)
The bus bar 40 (corresponding to the conductive path of the present invention) is formed by pressing a metal plate made of copper, copper alloy, stainless steel (SUS), aluminum or the like into a predetermined shape, as shown in FIG. Moreover, it has a substantially rectangular shape as a whole. A metal such as tin or nickel may be plated on the surface of the bus bar 40. The bus bar 40 is formed with a pair of terminal through-holes 41, 41 having a substantially circular shape through which a bolt for connecting to an electrode terminal is inserted, penetrating the bus bar 40. The terminal through hole 41 is set to be slightly larger than the hole diameter of the electrode terminal. The bolt is inserted into the terminal through hole 41 and the screw thread is screwed into the hole of the electrode terminal so that the bus bar 40 is sandwiched between the head of the bolt and the terminal block, so that the electrode terminal and the bus bar are inserted. 40 is electrically connected.

(Resin protector 11)
The resin protector 11 is formed by connecting a plurality of connecting units 12 and has an elongated and thin rectangular parallelepiped shape as a whole as shown in FIGS. 1 and 3. The resin protector 11 is provided with a plurality of bus bar holding portions 20 having a partition wall that opens to one side (perpendicular to the paper surface of FIG. 1) and that can partition the outside and hold the bus bar 40 along the longitudinal direction. Are arranged side by side at both ends. Each bus bar holding portion 20 is formed with a through-hole 20A that passes through one corner of the first voltage detection terminal 50, which will be described later, and two recesses 20B into which the other corner is fitted. A groove-shaped barrel holding portion 21 that holds the barrel portion 52 of one voltage detection terminal 50 is formed to extend obliquely with respect to the longitudinal direction of the bus bar holding portion 20. Accordingly, the first voltage detection terminal 50 can be installed obliquely with respect to the direction in which the bus bars 40 are arranged.

In addition, a plurality of detections having a partition wall that is open on one side and is partitioned from the outside and can hold a second voltage detection terminal 55 described later between the two rows of bus bar holding parts 20 arranged at both ends. The terminal holding part 22 is provided along with the bus bar holding part 20 located in the both sides along the longitudinal direction of the resin protector 11 at predetermined intervals. Further, a detection electric wire (not shown) connected to the first voltage detection terminal 50 and the second voltage detection terminal 55 is provided between the detection terminal holding part 22 and the bus bar holding parts 20 and 20 on both sides thereof. A pair of wire receiving grooves 25, 25 for receiving are provided along the longitudinal direction of the resin protector 11 with the detection terminal holding part 22 interposed therebetween.
As will be described later, the resin protector 11 is provided with a lid 30 that collectively covers the entire open surface of the resin protector 11.

(Connecting unit)
In the present embodiment, the resin protector 11 is configured by connecting four connecting units 12 as shown in FIG. Here, the first connecting unit 12A, the second connecting unit 12B, the third connecting unit 12C, and the fourth connecting unit 12D will be described from the left side in FIG.

  The first connecting unit 12A constitutes one end portion of the resin protector 11, and has a shape in which the lower right side in FIG. 2 protrudes to the right side in a step shape from the upper right side. A pair of plate-like fittings from the right edge in FIG. 2 of the groove wall portion 25B on the detection terminal holding portion 22 side of the pair of groove wall portions 25A and 25B of the two electric wire receiving grooves 25 and 25, respectively. Joint convex parts 13 and 13 are provided so as to extend along groove wall part 25B. The first connecting unit 12 </ b> A is integrally provided with a lid 30 described later via a resin hinge 31.

  On the other hand, the second unit 12B and the third connecting unit 12C are of the same shape constituting the intermediate part of the resin protector 11, and the upper left side in FIG. The lower side has a shape that protrudes to the right side in a stepped manner from the upper right side. Of the pair of groove walls 25A and 25B of the two electric wire receiving grooves 25 and 25, respectively, the fitting protrusion 13 and the fitting protrusion 13 described above are provided on the left end in FIG. 2 of the groove wall 25B on the detection terminal holding portion 22 side. A pair of fitting recesses 14 and 14 for receiving 13 are provided. The fitting recesses 14 and 14 are formed with a depth and size that allow the fitting projections 13 and 13 to be fitted by inserting the fitting projections 13 and 13 until the leading ends abut against each other.

  Moreover, from the edge part of the right side in FIG. 2 of the groove wall part 25B by the side of the detection terminal holding | maintenance part 22 among a pair of groove wall part 25A, 25B of each of the two electric wire accommodation grooves 25, 25, it is a pair of plate-shaped. The fitting convex parts 13 and 13 are provided so that it may extend along the groove wall part 25B.

  Further, the fourth connecting unit 12D constitutes the other end of the resin protector 11, and has a shape in which the upper left side protrudes to the left side in a stepped manner from the lower left side. Among the pair of groove wall portions 25A and 25B of the two electric wire receiving grooves 25 and 25, the left end portion of the groove wall portion 25B on the detection terminal holding portion 22 side receives the fitting convex portions 13 and 13. Fitting recesses 14 and 14 are provided.

  In addition, on the upper surface in FIG. 2 of the fourth connecting unit 12D, two mounting holes 15 that can be engaged with a mounting portion 33 of a resin hinge portion 32 of the lid portion 30 described later protrude in a rectangular shape and are lined up. Is provided.

  By fitting the fitting convex portion 13 and the fitting concave portion 14 described above, the resin protector 11 in which the first to fourth coupling units 12A to 12D are in the coupled state is configured, and the electric wire receiving groove 25 divided. , 25 and the bus bar holding part 20 are connected.

(Cover 30)
The first connecting unit 12A described above is integrally provided with the lid 30. The lid portion 30 has a plate shape that covers the entire open surface of the resin protector 11, and at the left side of the lower side surface in FIG. 2, the upper side surface in FIG. 2 and the two resin hinge portions 31 of the first unit 12A. , 31 are connected together. Further, a resin hinge portion 32 having a claw-like attachment portion 33 that can be attached to the attachment hole 15 of the above-described fourth connection unit 12D at the tip portion at a position on the right side of the lower side surface in FIG. Are provided side by side.

  Further, the upper end edge of the lid 30 in FIG. 2 is provided with a nail-like projection provided on the lower side of the first to fourth connection units 12A to 12D (resin protector 11) in FIG. A plurality (eight in the present embodiment) of engaging pieces 34 (equivalent to the engaging portions of the present invention) that can engage the mating protrusions 16 are provided side by side so as to rise from the lid surface. (See FIG. 4).

(Voltage detection terminals 50, 55)
Of the bus bar holding part 20 of the resin protector 11, the first voltage detection terminal for detecting the electrode voltage of the unit cell 13 is overlapped with the bus bar 40 on the side where the barrel holding part 23 is extended and formed. 50 is arranged. In the present embodiment, the first voltage detection terminal 50 has a substantially rectangular shape, and one of its corners is inserted into a through hole 20A provided in the bus bar holding part 20, and the two corners are recessed 20B. Is positioned with respect to the bus bar 40. In addition, an insertion hole 51 through which a connection bolt is inserted when connecting to the positive terminal or the negative terminal is formed near the center, and the first voltage detection terminal 50 is positioned with respect to the bus bar 40. In such a case, it is set so as to overlap with the through hole 41 of the bus bar 40.

  The first voltage detection terminal 50 is provided with a barrel portion 52 connected to the end of the detection wire. The barrel portion 52 is caulked so as to be wound around the core wire of the detection wire. The voltage detection terminal 50 and the detection electric wire are electrically connected. The detection electric wire is connected to an ECU (not shown). The ECU or the like detects the electrode voltage of the unit cell.

  In addition, a second voltage detection terminal 55 for detecting the internal voltage of the unit cell is disposed on the detection terminal holding portion 22 of the resin protector 11. The second voltage detection terminal 55 of the present embodiment has a substantially rectangular shape that is smaller than the first voltage detection terminal 50 described above, and is connected to the connection terminal of the cell in the vicinity of the center in the same manner as described above. At this time, an insertion hole 56 through which a connecting bolt is inserted is formed, and a barrel portion 57 connected to the end portion of the detection electric wire 45 is extended and formed at the end portion.

  These voltage detection terminals 50 and 55 are formed by pressing a metal plate material such as copper, copper alloy, stainless steel, or aluminum into a predetermined shape. The surfaces of the voltage detection terminals 50 and 55 may be plated with a metal such as tin or nickel.

(Assembly method of battery wiring module 10)
When assembling the battery wiring module 10 of the present embodiment described above, first, the first to fourth connection units 12A to 12D are combined. Specifically, the fitting convex portion 13 of each connecting unit 12 is inserted into the fitting concave portion 14 of the adjacent connecting unit 12 and pushed to a predetermined position.

  After assembling the connecting unit 12, next, the mounting portion 33 of the resin hinge portion 32 of the lid 30 is pushed into the mounting hole 15 of the fourth connecting unit 12D and attached, and the resin protector 11 (fourth connecting unit 12D) is attached. The lid 30 is integrated. Thereby, the cover part 30 is positioned with respect to the resin protector 11, and can be easily opened and closed with respect to the open surface of the resin protector 11 via the resin hinge parts 31 and 32.

  Next, the bus bar 40 is accommodated in the bus bar holding part 20 of the resin protector 11. And the 1st voltage detection terminal 50 of the state which crimped the detection electric wire (not shown) to the barrel part 52 is accommodated in the predetermined position in the bus-bar holding | maintenance part 20 of the resin protector 11, and it overlaps with the bus-bar 40. . And the detection electric wire led out from the barrel part 52 is arrange | positioned in the electric wire accommodation groove | channel 25. FIG.

  Then, the 2nd voltage detection terminal 55 is installed in the detection terminal holding | maintenance part 22, and the detection electric wire connected to this is arrange | positioned in the electric wire accommodation groove | channel 25 similarly to the above.

  The battery wiring module 10 of the present embodiment assembled in this way is attached to the upper surface side of the unit cell group arranged with the hole-shaped electrode terminals and connection terminals facing upward. That is, the battery wiring module 10 is placed on the upper side of the unit cell group, and a connection bolt (not shown) is inserted through the insertion hole 51 of the first voltage detection terminal 50 and the through hole 41 of the bus bar 40, Similarly, a connecting bolt (not shown) is inserted through the insertion hole 56 of the second voltage detection terminal 55, and the adjacent positive and negative electrode terminals, the electrode terminal and the first voltage detection terminal 50, and the connection The terminal and the second voltage detection terminal 55 are electrically connected.

  When all the connections are completed, finally, the lid 30 is rotated around the resin hinges 31 and 32 to close the open surface of the resin protector 11, and the engaging piece 34 and the engaging convex 16 are engaged. Let Thereby, the battery module 10 is completed.

(Operation and effect of the embodiment)
According to the battery wiring module 10 of the present embodiment described above, the lid portion 30 is provided integrally with the first connection unit 12A in advance, and can be attached to the fourth connection unit 12D via the resin hinge portion 32. Therefore, by simply combining the first to fourth connection units 12A to 12D, it is possible to easily attach the fourth connection unit 12D to the fourth connection unit 12D without performing positioning. Further, by attaching the lid 30 to the connecting unit 12 (resin protector 11) in advance before the battery wiring module 10 is attached to the single battery group, the battery wiring module 10 is attached to the single battery group at the installation site. Just after the battery wiring module 10 is attached to the unit cell group, the lid part 30 is rotated by the resin hinge parts 31 and 32 and the engaging piece part 34 is engaged with the engaging convex part 16. The lid can be smoothly closed.

  In the battery wiring module 10 having such a configuration, the molding die does not become too large, and the positioning operation of the lid 30 with respect to the resin protector 11 is extremely simple. Moreover, since the cover part 30 is the structure which covers the whole resin protector 11 collectively, compared with the structure which provides the several cover part 30, a lid closing operation | work is easy.

<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 form in which the lid portion 30 and the first connecting unit 12A are integrally molded in advance is shown. However, as a reference example, the lid portion 30 is molded as a separate body and is later attached to the resin protector 11. It is good also as a structure to attach.

(2) The positions and number of the resin hinge portions 31 and 32 and the engagement piece portion 34 are not limited to the above embodiment.

(3) Also, the configuration of the attachment portion 33 and the engagement piece portion 34 of the resin hinge portion 32 is not limited to the above embodiment, and any configuration can be used as long as the configuration is attachable and engageable. It may be configured.

(4) The resin protector 11 may have any configuration as long as the electrode terminal can be protected.

(5) In the above embodiment, the bus bar 40 is used to electrically connect the electrode terminals. However, for example, the protruding electrode terminals may be directly connected to each other. In short, the electrode terminals are electrically connected. Any configuration can be used as long as the configuration can be connected to the cable.

(6) In the present embodiment, the plurality of single cells are connected in series. However, the present invention is not limited to this, and the present invention may be applied to a configuration in which a plurality of single cell groups are connected in parallel.

DESCRIPTION OF SYMBOLS 10 ... Battery wiring module 11 ... Resin protector 12A-12D ... Connection unit 13 ... Fitting convex part 14 ... Fitting concave part 15 ... Mounting hole 16 ... Engaging convex part 30 ... Cover part 31, 32 ... Resin hinge part 33 ... Attachment Part 34: engagement piece (engagement part)
40 ... Bus bar (conductive path)
50 ... 1st voltage detection terminal 55 ... 2nd voltage detection terminal

Claims (1)

A battery wiring module that is attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged, and includes a resin protector that holds a conductive path connected between the electrode terminals, the resin protector In what is provided with a lid made of an insulating material covering the electrode terminal,
The resin protector is configured by connecting a plurality of connecting units,
The lid portion is integrally provided in advance in at least one of the plurality of connection units, and has a resin hinge portion that has an attachment portion that can be attached to at least one of the other connection units. It has an engaging part that is located on the opposite side of the resin hinge part and engages with the connecting unit ,
The battery wiring module, wherein the attachment portion is engageable with the connection unit by the engagement portion by attaching and closing the attachment portion to at least one of the other connection units.

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