JP5605307B2 - Battery wiring module - Google Patents

Description

  The present invention relates to a battery wiring module.

  For example, a power battery module mounted on an electric vehicle or a hybrid vehicle is generally configured by connecting a large number of single cells in series via a bus bar. In this type of battery module, it is necessary to connect a detection line for detecting the state of the unit cell group, such as a voltage detection line for measuring the terminal voltage of each unit cell, to the electrode terminal of the unit cell. As a configuration for connecting the detection line to the electrode terminal, a configuration in which the detection terminal is fixed to the terminal of the detection line and the detection terminal is fastened to the electrode terminal together with the bus bar is known.

  As an example of such a battery module, one in which a battery wiring module including a bus bar and a voltage detection terminal is attached to a unit cell group in which a plurality of unit cells are arranged and assembled is known. For example, in the battery wiring module described in Patent Document 1 below, the voltage detection terminal and the bus bar are provided with an insertion hole for inserting the electrode terminal, and the voltage detection terminal is aligned with the position of the insertion hole of the bus bar. In this way, it is stacked on the bus bar and accommodated in the bus bar accommodating portion. Then, the battery module is assembled by screwing a nut into each electrode terminal after attaching the battery wiring module to the unit cell group while inserting the electrode terminal through the insertion hole of the bus bar and the voltage detection terminal.

JP 2011-77031 A

  By the way, in the above-described battery wiring module, the detection terminal is positioned to some extent by being fitted into the bus bar housing portion. Thereby, since the positions of the insertion hole of the detection terminal and the insertion hole of the bus bar are kept in alignment, the workability when attaching the battery wiring module to the unit cell group is improved. However, in the method of positioning by fitting the detection terminal into the bus bar housing portion, the shape of the detection terminal has to be matched to the shape of the bus bar housing portion, and it is difficult to reduce the size.

  This invention is completed based on the above situations, Comprising: It aims at providing the battery wiring module which can make positioning of a detection terminal and size reduction of a detection terminal compatible.

The battery wiring module of the present invention is 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, the bus bar being connected to the electrode terminal, and the unit cell group And a fixing means for fixing the detection terminal to the bus bar, and the fixing means is provided in a slit provided in one of the detection terminal and the bus bar, and in the other. And an insertion portion to be inserted into the slit .
According to such a configuration, the detection terminal is directly fixed to the bus bar and held at a predetermined position. Therefore, it is not necessary to match the shape of the detection terminal to the shape of the bus bar housing portion, for example, as in the case of positioning by inserting the detection terminal into the bus bar housing portion. And both.

Moreover, the front-end | tip part of the said insertion part is good also as what is bent so that it may protrude ahead from the said slit and may be latched to the peripheral part. According to such a configuration, the bus bar and the detection terminal can be more firmly fixed.

  The detection terminal includes a terminal main body portion that is disposed so as to overlap the bus bar, the slit is provided in the bus bar, and the insertion portion is bent from the outer peripheral edge of the terminal main body portion to the bus bar side. It is good also as what was done. According to such a configuration, for example, the terminal main body portion can be further reduced in size as compared with the case where the insertion portion is formed by cutting and raising a part of the terminal main body portion or punching and bending it.

  The detection terminal includes a terminal main body portion arranged so as to overlap the bus bar, and the fixing means is provided in one of the terminal main body portion and the bus bar, and the terminal main body portion and the bus bar are stacked. A slit formed through in the direction and an insertion portion provided in the other and inserted into the slit, and a terminal receiver is provided on the side of the terminal main body portion of the resin protector holding the bus bar. A portion may be provided, and the detection terminal may be provided with an elastic piece that is bent from the terminal main body portion to one surface side and elastically contacts the terminal receiving portion. According to such a configuration, the terminal body portion is pushed by the elastic force of the elastic piece, and the locking force between the insertion portion and the slit is increased, so that the detection terminal and the bus bar can be more firmly fixed.

  ADVANTAGE OF THE INVENTION According to this invention, the battery wiring module which can make the positioning of a detection terminal and size reduction of a detection terminal compatible can be provided.

Plan view of the battery module of the present embodiment Battery module perspective view Perspective view of connecting unit Top view of connecting unit A perspective view of the connecting unit with the bus bar held Top view of the connecting unit with the bus bar held FIG. 7 is a cross-sectional view of the connecting unit in a state where the bus bar is held, and is a cross-sectional view corresponding to a cross section at the position AA in FIG. FIG. 7 is a cross-sectional view of the connecting unit in a state where the bus bar is held, and is a cross-sectional view corresponding to a cross section at the position BB in FIG. Perspective view of voltage detection terminal Top view of the connecting unit with the voltage detection terminal fixed to the bus bar FIG. 11 is a cross-sectional view of the connecting unit in a state where the voltage detection terminal is fixed to the bus bar, and is a cross-sectional view corresponding to the cross section at the CC position in FIG. FIG. 11 is a cross-sectional view of the connecting unit in a state where the voltage detection terminal is fixed to the bus bar, and is a cross-sectional view corresponding to a cross section at the DD position in FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail with reference to FIGS.
The battery wiring module 10 in the present embodiment is attached to a unit cell group 13 in which a plurality of cells (24 in the present embodiment) having positive and negative electrode terminals 11 are arranged, and positive electrodes of different unit cells 12. The electrode terminal 11 and the negative electrode terminal 11 are electrically connected. A battery module 14 in which the battery wiring module 10 is attached to the unit cell group 13 is used as a drive source of, for example, an electric vehicle or a hybrid vehicle.

  The unit cell 12 is a lithium ion battery, a nickel metal hydride battery, other secondary batteries, and the like, and has a main body 15 in which battery elements (not shown) are accommodated, and positive and negative electrode terminals 11. The main body 15 has a flat square box shape, and both the positive and negative electrode terminals 11 are provided on the upper surface of the main body 15. The plurality of single cells 12 are arranged so that the electrode terminals 11 having different polarities are adjacent to each other, and are integrally held by a holding member (not shown).

  The electrode terminal 11 is made of metal (copper, copper alloy, aluminum, aluminum alloy, etc.), and is formed by a known method such as cutting, casting, or forging. The electrode terminal 11 has a bolt shape with a threaded outer peripheral surface, and rises vertically from the center of a pedestal (not shown).

  The battery wiring module 10 includes a plurality of bus bars 21 connected to the electrode terminals 11. The bus bar 21 is for electrically connecting the electrode terminals 11 of different polarities of adjacent unit cells 12. The bus bar 21 is formed by, for example, pressing a metal plate material such as copper, copper alloy, stainless steel (SUS), or aluminum into a predetermined shape. As shown in FIG. 6, the bus bar 21 has a substantially rectangular shape as a whole, and has a symmetrical shape with the center in the longitudinal direction interposed therebetween. The surface of the bus bar 21 may be plated with a metal such as tin or nickel.

  The bus bar 21 is formed with a pair of insertion holes 22 through which the electrode terminals 11 of different polarities of adjacent unit cells 12 can be inserted. The insertion hole 22 is formed by punching the bus bar 21 in the plate thickness direction and has a substantially circular shape that is slightly larger than the cross-sectional shape of the electrode terminal 11.

  The bus bar 21 is inserted and held in a connecting unit 32 described later, and the bus bar 21 is provided with a locking projection 23 that locks to the connecting unit 32. When the locking projection 23 is locked to the connection unit 32, the bus bar 21 is prevented from being detached from the connection unit 32 (removal in the direction opposite to the insertion direction). A pair of the locking projections 23 is provided on one long edge side of the pair of long edges of the bus bar 21. The locking protrusion 23 has a shape in which the long edge side of the bus bar 21 is highest, and protrudes to one surface side of the bus bar 21 (see FIG. 7).

  A pair of long edges of the bus bar 21 are formed with recesses cut into a square shape, and a recess 24 formed on the long edge opposite to the side on which the locking projection 23 is provided. Has a contact portion 25 with which a stopper portion 41 of the connecting unit 32 described later contacts. The recessed portion 24 is provided at a central portion in the longitudinal direction of the bus bar 21, and the abutting portion 25 is an end edge of the recessed portion 24. When the contact portion 25 and the stopper portion 41 are in contact with each other, the detachment of the bus bar 21 from the connection unit 32 (detachment in the alignment direction of the connection units 32) is restricted. The pair of contact portions 25 included in the recessed portion 24 are both perpendicular to the long edge of the bus bar 21. Further, the pair of contact portions 25 are positioned sufficiently apart from each other so as to allow relative displacement in the parallel direction of the pair of connection units 32 connected via the one bus bar 21.

  The bus bar 21 is provided with a slit (fixing means) 26 for fixing a voltage detection terminal 51 described later to the bus bar 21. The slit 26 has an oblong shape elongated in the longitudinal direction of the bus bar 21 and is formed so as to penetrate in the thickness direction of the bus bar 21. The length of the slit 26 is smaller than the diameter of the insertion hole 22. A pair of slits 26 is provided on each bus bar 21. The pair of slits 26 are arranged on the side where the locking projection 23 is provided with respect to the insertion hole 22, and the slit 26 and the insertion hole 22 are arranged in the short direction of the bus bar 21. The pair of slits 26 are equal in size and shape.

The battery wiring module 10 includes a resin protector 31 that holds a plurality of bus bars 21, and the resin protector 31 includes a plurality of connection units 32 that are connected by the bus bars 21.
Each connecting unit 32 has a pair of bus bar holding portions 33 for receiving and holding the bus bar 21. One bus bar holding portion 33 accommodates and holds approximately half of the length of one bus bar 21 in the longitudinal direction, and substantially half of the bus bar 21 held by one bus bar holding portion 33 protrudes outward from the connecting unit 32. (Refer to FIG. 6) The protruding portion is accommodated and held in the bus bar holding portion 33 of the other connecting unit 32. Thus, the connecting unit 32 is connected via the bus bar 21. Note that an end connection unit 32 </ b> A having only one bus bar holding portion 33 is disposed at the end of the battery wiring module 10.

  An insulating wall 34 is provided between adjacent bus bar holding portions 33 in each connecting unit 32, and the pair of bus bars 21 held by one connecting unit 32 is insulated by the insulating wall 34. The upper end of the insulating wall 34 is arranged at a position higher than the upper end of the electrode terminal 11 in a state where the battery wiring module 10 is attached to the unit cell group 13, and a tool or the like contacts the adjacent electrode terminal 11 to cause a short circuit. It prevents that.

  Each bus bar holding portion 33 has a substantially rectangular shape surrounded by an insulating wall 34 and a peripheral wall 35, and a bus bar insertion port 36 for inserting the bus bar 21 into the bus bar holding portion 33 is provided on the peripheral wall 35. The peripheral wall 35 is vertically divided with the bus bar insertion port 36 in between, and a portion of the peripheral wall 35 arranged below the bus bar insertion port 36 (on the unit cell group 13 side) is the lower peripheral wall portion 35A and vice versa. The portion on the side is referred to as an upper peripheral wall portion 35B. The lower peripheral wall portion 35A is provided at a position shifted inward from the upper peripheral wall portion 35B (see FIG. 4).

  Each bus bar holding portion 33 opens in the vertical direction, and a bus bar support portion 37 that supports the lower surface side of the bus bar 21 is provided at a position close to the lower side, and the bus bar 21 is provided above the bus bar support portion 37. There is provided a bus bar presser 38 that presses the upper surface side. Both the bus bar support portion 37 and the bus bar presser portion 38 are provided to protrude from the insulating wall 34. In each bus bar holding portion 33, one bus bar holding portion 38 is provided on each of the insulating walls 34 on the bus bar insertion port 36 side and the back side, and the bus bar support portion 37 is provided between the bus bar holding portions 38. (See FIG. 6). In addition, the wall surface of the bus bar pressing part 38 on the back side is a terminal receiving part 39 with which an elastic piece 64 of a voltage detection terminal 51 described later comes into contact.

  As shown in FIG. 7, there is an interval between the bus bar pressing portion 38 and the bus bar support portion 37 that is equal to the vertical interval (opening dimension of the bus bar insertion port 36) between the upper peripheral wall portion 35B and the lower peripheral wall portion 35A. The interval is set to a size equivalent to the thickness of the bus bar 21. As shown in FIG. 8, the bus bar 21 accommodated in the bus bar holding part 33 is sandwiched between the bus bar support part 37 and the lower peripheral wall part 35A, and the bus bar presser part 38 and the upper peripheral wall part 35B. Is retained. Further, the upper peripheral wall portion 35B, the lower peripheral wall portion 35A, the bus bar presser portion 38, and the bus bar support portion 37 also have a guide function for guiding the bus bar 21 while maintaining the posture of the bus bar 21 when the bus bar 21 is inserted into the bus bar holding portion 33. Have.

  The bus bar holding portion 33 is provided with a stopper portion 41 that contacts the contact portion 25 of the bus bar 21 and prevents the bus bar 21 from being detached (see FIG. 6). The stopper portion 41 is provided at the back end between the upper peripheral wall portion 35B and the lower peripheral wall portion 35A. The stopper portion 41 is provided at a position spaced apart from the insulating wall 34 by a dimension larger than the dimension from one short edge of the bus bar 21 to the contact portion 25 on the side close to the short edge. . Thereby, relative displacement between the bus bar 21 and the connecting unit 32 (displacement in the connecting direction of the connecting unit 32) is allowed.

  Each connecting unit 32 is provided with an electric wire receiving groove 42 in which an electric wire 53 connected to a voltage detection terminal 51 described later is received along the direction in which the bus bar holding portions 33 are arranged. The electric wire accommodation groove 42 has a pair of groove wall parts 43, and the electric wire 53 is accommodated therebetween.

  Between one bus bar holding part 33 and the electric wire receiving groove 42 of the two bus bar holding parts 33, an introduction path 44 for introducing the electric wire 53 from the bus bar holding part 33 to the electric wire receiving groove 42 side is provided. Yes. The introduction path 44 is substantially perpendicular to the wire receiving groove 42.

  The electric wire receiving groove 42 and the introduction path 44 are provided with electric wire pressing pieces 45 that prevent the electric wires 53 from floating upward. The wire pressing piece 45 provided in the introduction path 44 is located at the end on the side of the wire accommodation groove 42 and protrudes from both sides of the introduction path 44 toward the center in the width direction. Further, the electric wire pressing piece 45 provided in the electric wire receiving groove 42 protrudes from the groove wall portion 43 toward the opposite groove wall portion 43 side.

  The connection unit 32 is provided with a lid portion 46 that closes the wire receiving groove 42 and is integrally provided with the connection unit 32. The lid portion 46 is provided so as to be capable of opening and closing via a hinge 47, and a lock piece 48 provided on the lid portion 46 is inserted into a lock hole 49 provided between the wire receiving groove 42 and the bus bar holding portion 33. Inserted and locked.

  The battery wiring module 10 is provided with a voltage detection terminal (detection terminal) 51 for detecting the voltage of the unit cell 12. The voltage detection terminal 51 is formed by pressing a metal plate material such as copper, copper alloy, stainless steel, or aluminum into a predetermined shape. The voltage detection terminal 51 has a terminal main body portion 52 arranged so as to overlap the bus bar 21 and a wire connection portion 54 to which a terminal portion of the wire 53 is connected. The surface of the voltage detection terminal 51 may be plated with a metal such as tin or nickel.

  The wire connection portion 54 is provided so as to protrude from the terminal main body portion 52 in one direction. As shown in FIG. 10, the wire connection portion 54 is provided at the center in the width direction of the terminal main body portion 52, and the voltage detection terminal 51 has a symmetrical shape with the wire connection portion 54 as the center. The wire connection portion 54 includes a wire barrel 56 that is crimped and crimped to the exposed core wire 55 at the terminal portion of the wire 53, and an insulation barrel 58 that is crimped and crimped to the end of the insulating coating 57. The wire barrel 56 and the insulation barrel 58 each have a pair of caulking pieces 61 that rise from the bottom plate 59 to the surface side. The tip of the electric wire 53 connected to the voltage detection terminal 51 is connected to an ECU or the like (not shown), and the voltage of the unit cell 12 is measured.

The terminal main body 52 is provided with an insertion hole 62 through which the electrode terminal 11 is inserted. The insertion hole 62 is positioned substantially at the center of the terminal body 52 and has a circular shape that is slightly larger than the insertion hole 22 of the bus bar 21. The voltage detection terminal 51 is disposed at a position where the insertion hole 62 is aligned with the insertion hole 22 of the bus bar 21, and is fixed to the bus bar 21.
The terminal main body portion 52 has a substantially square shape as a whole, and a pair of corner portions on the opposite side to the wire connection portion 54 is a slanted edge portion 63 that is cut off obliquely.

  The terminal main body portion 52 is provided with an elastic piece 64 that elastically contacts the terminal receiving portion 39 of the connecting unit 32. The elastic piece 64 has a cantilever shape bent substantially perpendicularly from the outer edge of the terminal main body 52 to the front side. A pair of elastic pieces 64 are provided on both sides of the electric wire connecting portion 54, and the pair of elastic pieces 64 are both located on the side of the insertion hole 62. The width dimension of the elastic piece 64 is smaller than the width dimension of the terminal receiving portion 39, and the rising dimension is a dimension that protrudes above the terminal receiving portion 39 in a state where the terminal main body portion 52 is in surface contact with the bus bar 21. (See FIG. 11).

  The voltage detection terminal 51 is provided with an insertion portion (fixing means) 65 for fixing the voltage detection terminal 51 to the bus bar 21. The insertion portion 65 is provided between the oblique edge portions 63 of the terminal main body portion 52 (in the center in the width direction), and is located on the opposite side of the wire connection portion 54 with the insertion hole 62 therebetween. As shown in FIG. 11, the insertion portion 65 has a cantilever shape bent from the outer edge of the terminal main body portion 52 to the back side (the side opposite to the rising side of the elastic piece 64). The width dimension of the insertion portion 65 is equal to or slightly smaller than the length dimension of the straight portion of the slit 26 (the portion excluding the semicircular portions at both ends of the slit 26) (see FIG. 10). The insertion portion 65 extends obliquely outward from the terminal main body portion 52, and its distal end portion 65 </ b> A is bent so as to be substantially parallel to the terminal main body portion 52. The distal end portion 65A of the insertion portion 65 protrudes forward (below the bus bar 21) from the slit 26 and engages with the peripheral edge portion (the lower surface of the bus bar 21) (see FIG. 11).

Next, an operation for fixing the voltage detection terminal 51 to the bus bar 21 will be described.
With respect to the bus bar 21 previously held by the resin protector 31, the voltage detection terminal 51 fixed to the terminal portion of the electric wire 53 is placed in an oblique posture (the terminal main body portion 52 is connected to the insertion portion 65 on the lower side and the electric wire connection portion 54 on the upper side). The posture is inclined with respect to the bus bar 21). And after inserting the insertion part 65 of the voltage detection terminal 51 in the slit 26 of the bus bar 21, the terminal main-body part 52 is pressed on the bus-bar 21 side. Then, one elastic piece 64 of the pair of elastic pieces 64 comes into contact with the terminal receiving portion 39 and slightly elastically deforms to the front side (terminal main body portion 52 side). Eventually, the terminal main body portion 52 becomes substantially parallel to the bus bar 21, and substantially the whole contacts the bus bar 21, and the insertion hole 62 of the terminal main body portion 52 is centered on the center of the insertion hole 22 of the bus bar 21. It is arranged in a row. At this time, the terminal main body portion 52 is pushed forward by the elastic force of the elastic piece 64, and the distal end portion 65 </ b> A of the insertion portion 65 is deeply locked to the peripheral edge portion of the slit 26. Thus, the voltage detection terminal 51 is fixed to the bus bar 21. After the voltage detection terminal 51 is fixed to the bus bar 21, the electric wire 53 is placed in the electric wire receiving groove 42 and the lid portion 46 is closed, so that the assembly of the battery wiring module 10 is completed and attachment to the unit cell group 13 is possible. Become.

Next, an operation for attaching the battery wiring module 10 to the unit cell group 13 will be described.
The assembled battery wiring module 10 is placed on the upper surface side of the unit cell group 13, and the electrode terminals 11 are inserted through the insertion holes 22 of all the bus bars 21 and the insertion holes 62 of the voltage detection terminals 51. At this time, the voltage detection terminal 51 is fixed to the bus bar 21, and the insertion hole 22 of the bus bar 21 and the insertion hole 62 of the voltage detection terminal 51 are connected to each other vertically with the center being the same. Can be done. After the electrode terminals 11 are inserted into all the insertion holes 22 and 62 and the nuts 16 are screwed into all the electrode terminals 11, the bus bar 21 and the voltage detection terminal 51 are connected to the electrode terminals 11. Thus, the attachment of the battery wiring module 10 to the single cell group 13 is completed, and the battery module 14 is completed.

According to the present embodiment configured as described above, the following effects can be obtained.
The battery wiring module 10 of this embodiment is a battery wiring module 10 that is attached to a unit cell group 13 in which a plurality of unit cells 12 having positive and negative electrode terminals 11 are arranged, and is connected to the electrode terminals 11. Each bus bar 21, a voltage detection terminal 51 for detecting the voltage of the unit cell 12, and fixing means for fixing the voltage detection terminal 51 to the bus bar 21.

  Thereby, the voltage detection terminal 51 is directly fixed to the bus bar 21 and held at a predetermined position. Therefore, for example, it is not necessary to match the shape of the voltage detection terminal to the shape of the bus bar housing portion as in the case of positioning by fitting the voltage detection terminal into the bus bar housing portion. The downsizing of the detection terminal 51 can be achieved at the same time. Moreover, since the voltage detection terminal 51 is directly fixed to the bus bar 21, the insertion hole 62 of the voltage detection terminal 51 and the insertion hole 22 of the bus bar 21 can be aligned more accurately.

  The fixing means for fixing the voltage detection terminal 51 to the bus bar 21 includes a slit 26 provided in the bus bar 21 and an insertion portion 65 provided in the voltage detection terminal 51 and inserted into the slit 26. ing. As described above, the structure in which the insertion portion 65 provided in the metal voltage detection terminal 51 is inserted and fixed into the slit 26 formed in the metal bus bar 21 is made of metal and has high strength. Further, the rotation of the voltage detection terminal 51 when tightening the nut 16 can be reliably prevented.

  Moreover, the front-end | tip part 65A of the insertion part 65 protrudes ahead from the slit 26, and is bent so that it may latch on the peripheral part. Thereby, the bus bar 21 and the voltage detection terminal 51 can be more firmly fixed. Here, when the battery wiring module is delivered or attached to the unit cell group, when the voltage detection terminal is detached, it is necessary to reattach the voltage detection terminal to a correct position. Carrying out such work on a large number of voltage detection terminals requires a great deal of labor and leads to deterioration of workability. However, since the battery wiring module 10 of the present embodiment can firmly fix the bus bar 21 and the voltage detection terminal 51, the voltage detection terminal 51 is not easily detached, and therefore, the above-described trouble is not required. Workability can be improved.

  Further, the insertion portion 65 is bent from the outer peripheral edge of the terminal main body portion 52 toward the bus bar 21. Therefore, for example, the terminal main body 52 can be further reduced in size compared to the case where the insertion portion is formed by cutting and raising a part of the terminal main body or punching and bending the terminal main body.

  In addition, a resin protector 31 that holds a plurality of bus bars 21 is provided, a terminal receiving portion 39 is provided on the side of the terminal main body portion 52 of the resin protector 31, and the voltage detection terminal 51 is provided on one side from the terminal main body portion 52. An elastic piece 64 that rises to the side and elastically contacts the terminal receiving portion 39 is provided. Thereby, the terminal main body 52 is pushed by the elastic force of the elastic piece 64, and the locking force between the insertion portion 65 and the slit 26 is increased. Therefore, the voltage detection terminal 51 and the bus bar 21 can be more firmly fixed.

<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 bus bar 21 is pressed and fixed to the electrode terminal 11 by the nut 16 paired with the electrode terminal 11. A screw hole may be formed, and the bus bar may be pressed and fixed to the electrode terminal by a bolt paired with the female screw hole.
(2) In the above embodiment, the single battery 12 is a square battery in which the main body portion 15 has a flat square box shape, but the present invention can be applied to any type of battery cell. For example, the present invention can also be applied to a cylindrical battery cell having a main body formed in a columnar shape.
(3) In the above embodiment, the resin protector 31 includes the plurality of connecting units 32. However, the present invention is not limited to this. For example, the resin protector may be a single resin plate that can hold all the bus bars. Good.
(4) In the above embodiment, the plurality of connecting units 32 are connected via the bus bar 21, but the present invention is not limited to this, and the connecting unit is directly connected to another connecting unit without using the bus bar. It may be.
(5) In the above embodiment, the fixing means is configured to include the slit 26 provided in the bus bar 21 and the insertion portion 65 provided in the voltage detection terminal 51. On the contrary, An insertion portion may be provided on the bus bar side, and a slit may be provided on the voltage detection terminal side.

(6) In the above-described embodiment, the insertion portion 65 is provided between the oblique edge portions 63 of the terminal main body portion 52 (the center in the width direction), and is located on the opposite side of the wire connection portion 54 with the insertion hole 62 therebetween. However, the present invention is not limited to this, and the number and position of the insertion portions can be arbitrarily set.
(7) In the above embodiment, the insertion portion 65 is bent from the outer edge of the terminal main body portion 52 to the back side. However, the present invention is not limited to this, and the insertion portion is cut out or punched out part of the terminal main body portion. It may be formed by bending up.
(8) In the above-described embodiment, the distal end portion 65A of the insertion portion 65 protrudes forward from the slit 26 and is firmly fixed by being locked to the peripheral portion thereof. However, the distal end portion of the insertion portion is not necessarily bent. There is no need, and for example, it may be firmly fixed by inserting the insertion portion into the slit without any gap.
(9) In the above embodiment, the slit 26 provided in the bus bar 21 is formed to penetrate in the plate thickness direction of the bus bar 21, and the insertion portion 65 of the voltage detection terminal 51 is bent from the terminal main body portion 52 to the back side. However, the present invention is not limited to this. For example, the bus bar slit is formed by cutting a part of the bus bar into an arch shape and opening it in a direction along the plate surface of the bus bar. It may extend in the same direction as the plate surface of the main body and be inserted into the slit.

DESCRIPTION OF SYMBOLS 10 ... Battery wiring module 11 ... Electrode terminal 12 ... Single cell 13 ... Single cell group 21 ... Bus bar 26 ... Slit 31 ... Resin protector 39 ... Terminal receiving part 51 ... Voltage detection terminal (detection terminal)
52 ... Terminal body 64 ... Elastic piece 65 ... Insertion part 65A ... Tip

Claims (4)

A battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged,
A bus bar connected to the electrode terminal;
A detection terminal for detecting a state of the unit cell group;
Fixing means for fixing the detection terminal to the bus bar ,
The battery wiring module , wherein the fixing means includes a slit provided in one of the detection terminal and the bus bar, and an insertion portion provided in the other and inserted into the slit . The battery wiring module according to claim 1, wherein a distal end portion of the insertion portion protrudes forward from the slit and is bent so as to be engaged with a peripheral portion thereof . The detection terminal has a terminal main body portion arranged to overlap the bus bar,
  The slit is provided in the bus bar,
  The battery wiring module according to claim 1, wherein the insertion portion is bent toward the bus bar from an outer peripheral edge of the terminal main body portion. The detection terminal has a terminal main body portion arranged to overlap the bus bar,
  The fixing means is provided in one of the terminal main body and the bus bar, and is formed through the slit in the stacking direction of the terminal main body and the bus bar. The insertion portion is provided in the other and inserted into the slit. And configured with
  On the side of the terminal body portion of the resin protector that holds the bus bar, a terminal receiving portion is provided,
  4. The battery according to claim 1, wherein the detection terminal is provided with an elastic piece that is bent to one surface side from the terminal main body portion and elastically contacts the terminal receiving portion. 5. Wiring module.

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