JP5618157B2 - 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 are connected side by side in order to increase the output. A plurality of unit cells are connected in series or in parallel by connecting electrode terminals of adjacent unit cells with a connecting member such as a bus bar.

  When assembling the battery module having the above-described configuration, since it is necessary to connect the electrode terminals at a plurality of locations with connecting members, a complicated operation of repeatedly connecting the connecting members between the electrode terminals is necessary.

  Therefore, depending on the number of electrode terminals to be connected, it is conceivable to form a battery connection plate in which a plurality of connection members arranged in a mold are integrally molded in a resin by insert molding or the like (for example, Patent Document 1). reference).

Japanese Patent No. 3990960

  When the battery connection plate described in Patent Document 1 is used, only one battery connection plate is attached to a plurality of electrode terminals protruding from a plurality of unit cells, and a plurality of locations between electrode terminals of adjacent unit cells are provided. It is possible to connect all together and improve work efficiency.

  However, since an assembly tolerance is set between a plurality of unit cells arranged, in a battery module in which a plurality of unit cells are arranged, the pitch between electrode terminals formed in adjacent unit cells is shifted. There is a case. Then, when the battery connection plate described above is connected to the electrode terminal, a positional shift occurs between the electrode terminal and the connection member of the battery connection plate, which may reduce the efficiency of the battery connection plate connection work. Is done.

  This invention is completed based on the above situations, Comprising: It aims at providing the battery module which can adjust easily the shift | offset | difference of the pitch between adjacent electrode terminals.

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, and a plurality of connecting members that connect the electrode terminals of different unit cells And a flexible printed circuit board for connecting the plurality of connection members, and the flexible printed circuit board bulges in a direction intersecting the plate surface of the flexible printed circuit board at a position between the adjacent connection members. A bent portion formed by bending the flexible printed circuit board is formed, and a bent portion reinforcing portion made of a copper foil formed by a printed wiring technique is formed in the bent portion .

  According to the present invention, when the pitch between the electrode terminals of the unit cell is wider than the normal dimension, the pitch deviation is absorbed by the extension of the bent portion formed on the flexible printed circuit board. Moreover, when the pitch of the electrode terminal building of a single cell is narrower than a regular dimension, the bending | deviation of a pitch can be absorbed because a bending part further bends. In this way, even when the pitch between the electrode terminals of the unit cells is shifted, the pitch shift can be easily absorbed.

Further , stress tends to concentrate on a locally bent portion such as a bent portion. According to the present invention , the bent portion can be reinforced by the bent portion reinforcing portion. As a result, even when stress is concentrated on the bent portion, it is possible to suppress the occurrence of problems in the flexible printed circuit board.

  It is preferable that a plurality of the copper foils that are elongated in the length direction of the flexible printed circuit board are formed side by side in the width direction of the flexible printed circuit board.

  According to said aspect, the intensity | strength of a bending part can be easily adjusted by increasing / decreasing the number of the copper foils located in a line with the width direction.

  It is preferable that a conductive path is formed on the flexible printed circuit board by a printed wiring technique, and a land electrically connected to the connection member is formed on the conductive path.

  According to said aspect, the electrode terminal of a cell is electrically connected with a land via the connection member connected to the electrode terminal. Since this land is electrically connected to the conductive path of the flexible printed circuit board, the electrode terminal of the unit cell and the conductive path of the flexible printed circuit board can be electrically connected. Thereby, a flexible printed circuit board can be used as a detection line for detecting the state of a single cell. As a result, it is not necessary to use a detection line for detecting the state of the unit cell separately from the flexible printed circuit board, so that the number of parts can be reduced.

  It is preferable that a land reinforcing portion made of a copper foil formed by a printed wiring technique is formed in the vicinity of the land on the flexible printed board.

  According to said aspect, it is suppressed that a flexible printed circuit board bends and deforms in the vicinity of a land. Thereby, since it is suppressed that excessive force is applied with respect to the connection part of a land and a connection member, the electrical connection reliability of a flexible printed circuit board and a connection member can be improved.

  It is preferable that the land reinforcing portion is formed by a plurality of the copper foils extending in the length direction of the flexible printed circuit board and arranged in the width direction of the flexible printed circuit board.

  According to said aspect, the intensity | strength of the flexible printed circuit board in the vicinity of a land can be easily adjusted by increasing / decreasing the number of copper foils located in a line with the width direction.

  Each of the plurality of connection members is housed in a plurality of housing members, and the housing member is preferably provided with a holding portion that holds a portion of the flexible printed board that is different from the bent portion.

Since the flexible printed circuit board has flexibility, when a force is applied from the outside, the flexible printed circuit board may be deformed at a portion different from the bent portion. Then, when attaching the battery wiring module to the single cell group, it is necessary to attach the battery wiring module while correcting the shape of the flexible printed circuit board. According to said aspect, the part different from a bending part among flexible printed circuit boards is hold | maintained by the holding part formed in the accommodating member. Thereby, since the shape of a flexible printed circuit board is hold | maintained by the accommodating member, a deformation | transformation in a bending part can be accept | permitted, maintaining the shape of a part different from a bending part. As a result, it is possible to improve the working efficiency when attaching the battery wiring module to the unit cell group. Further, the present invention is attached to the unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged. A battery wiring module, comprising: a plurality of connecting members that connect the electrode terminals of different unit cells; and a flexible printed board that connects the plurality of connecting members, and the flexible printed board includes a printed wiring A conductive path is formed by the technology, and a bent portion formed by bending the flexible printed circuit board is formed at a position between the adjacent connecting members so as to bulge in a direction intersecting the plate surface of the flexible printed circuit board. The conductive path is formed with a land electrically connected to the connection member, and the flexi In the bull printed circuit board, a land reinforcing portion made of a copper foil formed by a printed wiring technique is formed in the vicinity of the land .

  According to the present invention, it is possible to easily adjust a pitch shift between adjacent electrode terminals.

FIG. 1 is a plan view showing a battery module according to an embodiment. FIG. 2 is a plan view showing the battery wiring module. FIG. 3 is a perspective view showing the battery wiring module. FIG. 4 is a plan view showing the battery wiring module with the cover opened. FIG. 5 is a plan view showing the bus bar. FIG. 6 is a plan view showing a state in which a plurality of bus bars are connected by FPC. FIG. 7 is a side view showing the battery wiring module with the cover open. FIG. 8 is a partially enlarged plan view showing the FPC. FIG. 9 is a perspective view showing a state in which a plurality of bus bars are connected by FPC. FIG. 10 is a side view showing a state in which a plurality of bus bars are connected by FPC. FIG. 11 is a partially enlarged plan view showing an FPC according to another embodiment (1). FIG. 12 is a partially enlarged plan view showing an FPC according to another embodiment (2).

<Embodiment>
A first embodiment of the present invention will be described with reference to FIGS. The battery module 10 according to the present embodiment is used as a drive source for an electric vehicle or a hybrid vehicle (not shown), for example. The battery module 10 includes a single battery group 12 in which a plurality of single batteries 11 are arranged side by side, and a battery wiring module 13 attached to the single battery group 12. In the following, the left side in FIG. 1 is the left side, and the right side is the right side. Further, an explanation will be made assuming that the upper side of FIG. 3 is the upper side and the lower side is the lower side.

  As shown in FIG. 1, the unit cell 11 has a flat rectangular parallelepiped shape. A power generation element (not shown) is accommodated inside the unit cell 11. On the upper surface of the unit cell 11, a pair of electrode terminals 14, 14 composed of a positive electrode and a negative electrode are formed protruding upward. A thread is formed on the outer peripheral surface of the electrode terminal 14. The positive and negative directions of the electrode terminals 14 are opposite in the unit cells 11 adjacent to each other. Accordingly, the electrode terminals 14 having different polarities are adjacent to each other. The plurality of single cells 11 are fixed by a holding plate (not shown).

  A battery wiring module 13 is attached to the upper surface of the unit cell group 12. The battery wiring module 13 connects a plurality of bus bars 15 (an example of connection members) that connect electrode terminals 14 of different unit cells 11, a plurality of housing members 16 that house each bus bar 15, and a plurality of bus bars 15. Flexible printed circuit board 17 (hereinafter referred to as FPC 17).

  As shown in FIGS. 1 and 2, the plurality of accommodating members 16 are arranged along the arrangement direction of the plurality of single cells 11. Each accommodating member 16 accommodates a bus bar 15. Further, as shown in FIG. 3, the plurality of housing members 16 hold an FPC 17 having an elongated strip shape.

  As shown in FIG. 5, the bus bar 15 has a substantially rectangular shape when viewed from above. The bus bar 15 is formed by pressing a metal plate material into a predetermined shape. The bus bar 15 is made of a metal such as copper, a copper alloy, or stainless steel (SUS). A plating layer such as tin or nickel may be formed on the surface of the bus bar 15.

  In the bus bar 15, a pair of terminal insertion holes 18 and 18 through which the electrode terminals 14 are inserted are formed side by side in the left-right direction at a position near the upper end in FIG. 5. The electrode terminal 14 of the unit cell 11 is inserted into the terminal insertion hole 18, and a nut (not shown) is screwed to the electrode terminal 14. Thereby, the electrode terminal 14 and the bus bar 15 are electrically connected.

  Of the bus bar 15, a notch 19 is formed at the upper edge in FIG. 5 near the center in the left-right direction. As shown in FIG. 6, the FPC 17 is superposed on a substantially lower half region in FIG. 6 of the bus bar 15. In the bus bar 15, an area where the FPC 17 is placed is an FPC placement area 20, and an area where the FPC 17 is not placed is a terminal connection portion 21 having a function of electrically connecting the electrode terminals 14 to each other.

  As shown in FIG. 6, the FPC 17 has a strip shape elongated in the left-right direction. The FPC 17 is formed by forming a conductive path 22 on an insulating base material by a printed wiring technique. A base material consists of a synthetic resin which has insulation. As the synthetic resin, for example, polyimide can be used, and any synthetic resin can be appropriately selected as necessary.

  As shown in FIG. 5, four bus bar through holes 23 penetrating the bus bar 15 are formed in a region of the bus bar 15 where the FPC 17 is placed. As shown in FIG. 6, the FPC 17 has an FPC through hole 24 at a position corresponding to the bus bar through hole 23 in a state of being overlapped with the bus bar 15. The bus bar through hole 23 and the FPC through hole 24 have substantially the same shape, and have an oblong shape elongated in the left-right direction.

  As shown in FIG. 4, the housing member 16 is made of synthetic resin, and includes a bus bar housing portion 25 in which the bus bar 15 is housed, and a cover 27 integrally connected via the bus bar housing portion 25 and the hinge 26. Prepare.

  The bus bar accommodating portion 25 is formed in a slightly larger shape than the bus bar 15. In the bus bar accommodating portion 25, an insulating wall 28 for insulating from the adjacent bus bar 15 is erected so as to surround the terminal connecting portion 21 from three sides. The insulating wall 28 is not formed on the FPC placement area 20 side of the bus bar 15.

  On the insulating wall 28, a convex portion 29 that bulges toward the bus bar 15 is formed at a position corresponding to the notch portion 19 in a state where the bus bar 15 is accommodated in the bus bar accommodating portion 25. The left and right side edges of the convex portion 29 are in contact with the left and right side edges of the notch 19, so that the bus bar 15 is restricted from moving in the left and right directions in the bus bar housing portion 25.

  The protrusion 29 is formed with a locking claw 30 that locks the bus bar 15 from the bus bar housing portion 25 upward by locking with the terminal connection portion 21 of the bus bar 15 from above.

  As shown in FIG. 3 and FIG. 7, the bus bar 15 and the FPC 17 are placed at the regular positions on the portion of the bus bar housing portion 25 where the FPC placement area 20 of the bus bar 15 is placed. A plurality of (four in this embodiment) pins 31 (an example of a holding portion) are formed to protrude upward at positions corresponding to the through holes 23 and the FPC through holes 24. The pin 31 has a columnar shape that is elongated in the left-right direction when viewed from above. The outer shape of the pin 31 is slightly smaller than the inner shapes of the bus bar through hole 23 and the FPC through hole 24. Thereby, the pin 31 can be inserted into the bus bar through hole 23 and the FPC through hole 24.

  The bus bar 15 and the FPC 17 are held by the housing member 16 when the outer peripheral surface of the pin 31 comes into contact with the inner peripheral surfaces of the bus bar through hole 23 and the FPC through hole 24. More specifically, when the outer peripheral surface of the pin 31 comes into contact with the outer peripheral surface of the bus bar through-hole 23, the bus bar 15 is restricted from moving in the direction along the plate surface of the bus bar 15, and the bus bar 15 is held. It has become so. Further, when the outer peripheral surface of the pin 31 comes into contact with the outer peripheral surface of the FPC through-hole 24, the FPC 17 is restricted from moving in the direction along the plate surface of the FPC 17, and the FPC 17 is held. .

  As shown in FIGS. 3 and 4, the cover 27 is formed to be rotatable about a hinge 26 as a fulcrum. The cover 27 is formed with a lock portion 32 at the edge opposite to the hinge 26. The cover 27 is held in a state of covering the FPC 17 by engaging the lock portion 32 with a lock receiving portion 33 formed on the insulating wall 28 described later.

  The cover 27 is formed with a plurality of pressing ribs 34 for pressing the FPC 17 on the surface facing the FPC 17 in a state where the lock portion 32 and the lock receiving portion 33 are engaged. The holding rib 34 has an elongated shape in a direction along the length direction of the FPC 17. The plurality of holding ribs 34 are formed side by side with a space in the width direction of the FPC 17.

  Further, the cover 27 has relief recesses 35 at the four corners of the cover 27 for avoiding interference between the pin 31 and the cover 27 in a state where the lock portion 32 and the lock receiving portion 33 are engaged. It is formed to be depressed at a position corresponding to the pin 31.

  As shown in FIG. 8, a plurality of lands 36 connected to the respective bus bars 15 are formed at the ends of the conductive paths 22 formed in the FPC 17. In the present embodiment, the land 36 is electrically connected to the FPC placement area 20 of the bus bar 15 in a state where the FPC 17 is placed on the FPC placement area 20 of the bus bar 15. The land 36 and the bus bar 15 are connected by an arbitrary method as necessary, such as soldering, conductive adhesive, brazing, or the like. By connecting the land 36 and the bus bar 15, the plurality of bus bars 15 are coupled by the FPC 17.

  By connecting the land 36 and the bus bar 15, the FPC 17 and the electrode terminal 14 are electrically connected via the conductive path 22, the land 36, and the bus bar 15. Thereby, the FPC 17 can be used as a detection line for detecting the state of the unit cell 11 in the electrode terminal 14. In the present embodiment, the FPC 17 is used as a voltage detection line that detects the voltage of the unit cell 11. One end of the FPC 17 is led out from the battery wiring module 13 and connected to an ECU (not shown). By this ECU, the voltage at the electrode terminal 14 of each unit cell 11 is detected.

  The land 36 is formed inside a region surrounded by the four FPC through holes 24. As described above, when the pin 31 and the FPC through hole 24 are engaged, the FPC 17 is held by the accommodating member 16, and the pin 31 and the bus bar through hole 23 are engaged. As a result, the bus bar 15 is held by the housing member 16. That is, the relative position between the FPC 17 and the bus bar 15 is held via the pin 31. Thereby, the land 36 and the bus bar 15 are restricted from being displaced from each other, so that the electrical connection between the land 36 and the bus bar 15 is ensured.

  As shown in FIG. 8, a land reinforcing portion 37 made of a copper foil formed by a printed wiring technique is formed in the FPC 17 in the vicinity of the land 36. The land reinforcing portion 37 is formed in a region surrounded by the four FPC through holes 24. The land reinforcing portion 37 is formed by arranging a plurality of copper foils that are elongated in the length direction of the FPC 17 (left and right direction in FIG. 8) with an interval in the width direction (up and down direction in FIG. 8) of the FPC 17. The land reinforcing portions 37 are electrically insulated from each other. Further, the land reinforcing portion 37 and the conductive path 22 are also electrically insulated.

  As shown in FIGS. 9 and 10, the FPC 17 is formed by bending the FPC 17 so as to bulge in a direction intersecting the plate surface of the FPC 17 at a position between a plurality of adjacent bus bars 15 connected to the FPC 17. A bent portion 38 is formed. In the present embodiment, the bent portion 38 is formed to bulge downward (downward in FIG. 10) with respect to the plate surface of the FPC 17. By bending the bent portion 38, the FPC 17 can be expanded and contracted in the left-right direction (left-right direction in FIG. 10).

  As shown in FIG. 8, the bent portion 38 is formed with a bent portion reinforcing portion 39 made of a copper foil formed by a printed wiring technique. The bent portion reinforcing portion 39 is formed across the bent portion 38 in the left-right direction (left-right direction in FIG. 8). The bent portion reinforcing portion 39 is formed by arranging a plurality of copper foils elongated in the length direction of the FPC 17 (the left-right direction in FIG. 8) with a gap in the width direction of the FPC 17 (the vertical direction in FIG. 8). . The bent portion reinforcing portions 39 are electrically insulated from each other. Further, the bent portion reinforcing portion 39 and the conductive path 22 are also electrically insulated. The bent portion reinforcing portion 39 is formed at a position sandwiching the conductive path 22 formed in the bent portion 38 from the width direction of the FPC 17. In the present embodiment, two conductive paths 22 are arranged at two positions above and below the conductive path 22 in FIG.

(Assembly method)
Then, an example of the assembly method of the battery module 10 which concerns on this embodiment is demonstrated. First, a plurality of bus bars 15 are formed by pressing a metal plate material. Moreover, the some accommodating member 16 is formed with a synthetic resin.

  The conductive path 22, the land 36, the bent portion reinforcing portion 39, and the land reinforcing portion 37 are formed on the FPC 17 by a printed wiring technique. Further, the FPC through hole 24 is formed by punching out the FPC 17 with a punch or the like. Further, the bent portion 38 is formed by bending the FPC 17 at a predetermined position.

  Subsequently, a conductive adhesive is applied to a region different from the bent portion 38 on the surface of the FPC 17 where the land 36 is formed. Thereafter, the bus bar 15 is attached to the lower surface of the bus bar 15 in a posture in which the bus bar through hole 23 and the FPC through hole 24 are aligned. The bus bar 15 and the FPC 17 are bonded together by being pressed by a not-shown press machine or the like. Thereby, the land 36 and the bus bar 15 are electrically connected. The land 36 and the bus bar 15 may be connected by soldering.

  After the plurality of bus bars 15 are connected by the FPC 17 as described above, the FPC 17 and the bus bars 15 are accommodated in the accommodating member 16. Specifically, the bus bar 15 and the FPC 17 are connected to the bus bar in a posture in which the notch portion 19 of the bus bar 15 corresponds to the convex portion 29 of the bus bar housing portion 25 and the bus bar through hole 23 and the FPC through hole 24 correspond to the pin 31. It is placed in the storage unit 25. At this time, the locking claw 30 of the housing member 16 is locked to the bus bar 15 from above, so that the bus bar 15 is prevented from coming out upward.

  The cover 27 is locked in a closed state with respect to the housing member 16 by elastically engaging the lock portion 32 of the cover 27 and the lock receiving portion 33 of the housing member 16. Thereby, the battery wiring module 13 is completed.

  Next, the plurality of single cells 11 are arranged in a line with the surface on which the electrode terminals 14 are formed facing upward. At this time, the unit cells 11 are arranged such that the polarities of the adjacent electrode terminals 14 are different from each other. A plurality of single cells 11 are held by a holding plate.

  A battery wiring module 13 is disposed on the upper surface of the unit cell group 12. Specifically, the battery wiring module 13 is attached from above the unit cell group 12 while the electrode terminals 14 are inserted through the terminal insertion holes 18 of the bus bar 15. Then, the electrode terminal 14 and the bus bar 15 are connected by screwing and tightening a nut to each electrode terminal 14. Thereby, the battery module 10 is formed.

(Operation and effect of the embodiment)
Then, the effect | action and effect of this embodiment are demonstrated. According to the present embodiment, the FPC 17 is formed with a bent portion 38 formed by bending the FPC 17 so as to bulge in a direction intersecting the plate surface of the FPC 17 at a position between the adjacent connecting members. Thereby, when the pitch between the electrode terminals 14 of the unit cell 11 is wider than a normal dimension, the pitch shift | offset | difference is absorbed by the bending part 38 formed in FPC17 extending. In addition, when the pitch between the electrode terminals 14 of the unit cell 11 is narrower than the normal dimension, the bent portion 38 can be further bent to absorb the pitch deviation. Thus, even when the pitch between the electrode terminals 14 of the unit cell 11 is shifted, the shift in pitch can be easily absorbed.

  As described above, when the bending portion 38 expands and contracts, stress tends to concentrate on a locally bent portion such as the bending portion 38. According to the present embodiment, the bending portion reinforcement portion 39 is formed in the bending portion 38. Since the bent portion 38 can be reinforced by the bent portion reinforcing portion 39, it is possible to suppress the occurrence of problems in the flexible printed circuit board even when stress is concentrated on the bent portion 38.

  Further, the bent portion reinforcing portion 39 is formed by arranging a plurality of elongated copper foils extending in the length direction of the FPC 17 in the width direction of the FPC 17. Thereby, the intensity | strength of the bending part 38 can be easily adjusted by increasing / decreasing the number of the copper foils arranged in a width direction.

  Further, a conductive path 22 is formed in the FPC 17 by a printed wiring technique, and a land 36 electrically connected to the bus bar 15 is formed in the conductive path 22. Thereby, the electrode terminal 14 of the cell 11 is electrically connected to the land 36 via the bus bar 15 connected to the electrode terminal 14. Since the land 36 is electrically connected to the conductive path 22 of the FPC 17, the electrode terminal 14 of the unit cell 11 and the conductive path 22 of the FPC 17 can be electrically connected. Thereby, the FPC 17 can be used as a detection line for detecting the state of the unit cell 11. As a result, it is not necessary to use a detection line for detecting the state of the unit cell 11 separately from the FPC 17, so that the number of components can be reduced.

  In addition, a land reinforcing portion 37 is formed in the vicinity of the land 36 in the FPC 17. Thereby, the FPC 17 is prevented from being bent and deformed in the vicinity of the land 36. Thereby, since it is suppressed that excessive force is applied with respect to the connection part of the land 36 and the bus-bar 15, the electrical connection reliability of FPC17 and the bus-bar 15 can be improved.

  Further, the land reinforcing portion 37 is formed by arranging a plurality of elongated copper foils extending in the length direction of the FPC 17 in the width direction of the FPC 17. Thereby, the strength of the FPC 17 in the vicinity of the land 36 can be easily adjusted by increasing or decreasing the number of copper foils arranged in the width direction.

  Each of the plurality of bus bars 15 is housed in a plurality of housing members 16, and the housing member 16 is provided with a pin 31 that holds a portion of the FPC 17 that is different from the bent portion 38. Since the FPC 17 has flexibility, it may be deformed in a portion different from the bent portion 38 when a force is applied from the outside. Then, when attaching the battery wiring module 13 to the single cell group 12, it is necessary to attach the battery wiring module 13 while correcting the shape of the FPC 17, and there is a concern that the efficiency of the battery wiring module 13 attachment work may be reduced. According to the above aspect, the portion of the FPC 17 that is different from the bent portion 38 is held by the pin 31 formed on the housing member 16. Thereby, since the shape of the FPC 17 is held by the accommodating member 16, it is possible to allow deformation in the bent portion 38 while holding the shape of a portion different from the bent portion 38. As a result, work efficiency when the battery wiring module 13 is attached to the unit cell group 12 can be improved.

<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 present embodiment, the land reinforcing portion 37 and the bent portion reinforcing portion 39 are arranged such that a plurality of copper foils elongated in the length direction of the FPC 17 are arranged side by side in the width direction of the FPC 17. However, the present invention is not limited to this. For example, as shown in FIG. 11, the land reinforcing portion 57 and the bent portion reinforcing portion 59 may be formed of a relatively wide copper foil.

(2) Further, as shown in FIG. 12, the land reinforcing portion 67 may be formed integrally with the conductive path 62 by expanding a part of the conductive path 62. Alternatively, the bent portion reinforcing portion 69 </ b> A may be formed integrally with the conductive path 62 by expanding a part of the conductive path 62 that crosses the bent portion 38.
Further, the bent portion reinforcing portion 69 </ b> B may be formed integrally with the conductive path 63 connected to the land 66 by expanding a part of the conductive path 63.

  (3) In the present embodiment, the bent portion 38 is formed to be bent so as to bulge downward with respect to the plate surface of the FPC 17. It is good also as a structure formed by bending so that it may bulge upward with respect to a plate surface. Moreover, the bending part 38 is good also as a structure which is bent in the shape of a bellows seeing from the side, and bulges in the up-down both directions with respect to the plate | board surface of FPC17.

  (4) In the present embodiment, the bent portion reinforcing portion 39 is formed in the bent portion 38, but the bent portion reinforcing portion 39 may be omitted.

  (5) In the present embodiment, the land reinforcing portion 37 is formed in the vicinity of the land 36. However, the present invention is not limited to this, and the land reinforcing portion 37 may be omitted.

DESCRIPTION OF SYMBOLS 11 ... Single cell 12 ... Single cell group 13 ... Battery wiring module 14 ... Electrode terminal 15 ... Bus bar (connection member)
16 ... Housing member 17 ... FPC (flexible printed circuit board)
22 ... Conductive path 31 ... Pin (holding part)
36 ... Land 37 ... Land reinforcement part 38 ... Bending part 39 ... Bending part reinforcement part

Claims (9)

A battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged,
A plurality of connecting members for connecting the electrode terminals of different unit cells, and a flexible printed circuit board for connecting the plurality of connecting members,
Wherein the flexible printed circuit board at a position between said connecting member adjacent, and said the bent part formed by bending the flexible printed circuit board is formed so as to bulge in a direction intersecting with the plate surface of the flexible printed circuit board ,
The battery wiring module in which the bending part reinforcement part which consists of copper foil formed by the printed wiring technique is formed in the said bending part .   2. The battery wiring according to claim 1, wherein the bending portion reinforcing portion includes a plurality of the copper foils that are elongated in the length direction of the flexible printed circuit board and are arranged in the width direction of the flexible printed circuit board. module. The conductive path is formed in the said flexible printed circuit board by the printed wiring technique, The land electrically connected with the said connection member is formed in the said conductive path . Battery wiring module. The battery wiring module according to claim 3 , wherein a land reinforcing portion made of a copper foil formed by a printed wiring technique is formed in the vicinity of the land on the flexible printed board . 5. The battery wiring module according to claim 4 , wherein the land reinforcing portion is formed by arranging a plurality of elongated copper foils extending in the length direction of the flexible printed circuit board in the width direction of the flexible printed circuit board. . The plurality of connection members are housed in a plurality of housing members, respectively, and the housing member is provided with a holding portion that holds a portion of the flexible printed board different from the bent portion. The battery wiring module according to claim 5 . A battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged,
A plurality of connecting members for connecting the electrode terminals of different unit cells, and a flexible printed circuit board for connecting the plurality of connecting members,
In the flexible printed circuit board, a conductive path is formed by a printed wiring technique, and the flexible printed circuit is swelled in a direction intersecting the plate surface of the flexible printed circuit board at a position between the adjacent connecting members. A bent part is formed by bending the substrate,
A land electrically connected to the connection member is formed in the conductive path,
A battery wiring module in which a land reinforcing portion made of a copper foil formed by a printed wiring technique is formed in the vicinity of the land on the flexible printed board .   8. The battery wiring module according to claim 7, wherein the land reinforcing portion is formed by arranging a plurality of the copper foils extending in the length direction of the flexible printed circuit board in the width direction of the flexible printed circuit board. .   The plurality of connection members are housed in a plurality of housing members, respectively, and the housing member is provided with a holding portion that holds a portion of the flexible printed board that is different from the bent portion. The battery wiring module according to claim 8.

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