JP2013080693A - Wiring module for battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring module for battery in which the voltage of each unit cell can be detected easily.SOLUTION: The wiring module 40 for battery is provided in a unit cell group 20 where a plurality of unit cells 21, each having electrode terminals 80 of a positive electrode and a negative electrode, are connected in series. The wiring module 40 for battery includes a flexible printed circuit board 41 configured by aggregating a plurality of conducting paths 42, a projection piece 44 provided on the flexible printed circuit board 41 while having a voltage detection terminal 47 provided at the end of the conducting path 42, a resin protector 60 which holds the flexible printed circuit board 41, and a connector fitting part 66 provided in the resin protector 60 and bringing the voltage detection terminal 47 into connection state with the electrode terminal 80 of the unit cell 21 by fitting to the fitted part 26 provided on the unit cell side while housing the voltage detection terminal 47 inside.

Description

  The present invention relates to a battery wiring module.

  For example, a battery module described in Patent Document 1 is known as a battery module mounted on a vehicle such as an electric vehicle or a hybrid vehicle. This has a unit cell group in which a plurality of unit cells having positive and negative electrode terminals at the upper end are arranged side by side, and a battery wiring module attached to the unit cell group.

  The battery wiring module is fastened together with the bus bar by connecting the cells in series by connecting the positive electrode terminal and the negative electrode terminal of the adjacent unit cells, and screwing the nut to the electrode terminal. A voltage detection terminal and an insulating resin protector that accommodates the bus bar and the voltage detection terminal therein are provided. The voltage detection terminal is connected to, for example, an ECU via a voltage detection line, and the voltage of each unit cell is detected by the ECU.

JP 2011-91003 A

  However, according to the above configuration, since the electrode detection terminal must be tightened and connected to the electrode terminal by the nut, there is a problem that the connection work between the voltage detection terminal and the electrode terminal is complicated.

  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 capable of easily connecting a voltage detection terminal and an electrode terminal.

As a means for achieving the above object, the present invention provides a battery wiring module provided in a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are connected in series, with a voltage at the end. A collective conductive line formed by assembling a plurality of conductive paths having detection terminals, an insulating support member for holding the collective conductive lines, and provided in the insulating support member, and accommodating the voltage detection terminal therein It is characterized in that it includes a connector fitting portion that is connected to the fitting portion provided on the unit cell group side to connect the voltage detection terminal to the electrode terminal of the unit cell. .
According to the battery wiring module having such a configuration, the voltage detecting terminal and the electrode terminal can be brought into a connected state by fitting the connector fitting portion and the fitted portion, so that the nut is the electrode terminal. As compared with the conventional battery wiring module that connects the voltage detection terminal and the electrode terminal by tightening to, the connection operation between the voltage detection terminal and the electrode terminal can be easily performed.
The following configuration is preferable as an embodiment of the present invention.
The collective conductive line may be formed of a flexible printed board.
According to such a configuration, a work process for bundling electric wires is not required and the battery wiring module can be reduced in weight as compared with a collective conductive line formed by a wire harness in which electric wires are bundled.
An electronic component for processing voltage information of the unit cell may be mounted on the flexible printed board in a state of being connected to the conductive path.
The collective electric line needed to constitute an ECU in which a plurality of electronic components for processing voltage signals were integrated at the end on the side different from the voltage detection terminal, but according to the above configuration, Since an electronic component for processing voltage information is mounted on the flexible printed board, the ECU can be miniaturized. As a result, it is possible to effectively use the area that was previously occupied by electronic components and could not be used.
The insulating support member may be configured to surround the collective conductive line.
There is a risk of disconnection of the conductive path due to other members coming into contact with the collective conductive line. However, according to such a configuration, the collective conductive line is surrounded by the insulating support member. It can prevent that a member contacts.
The connector fitting portion is provided with a lock portion that holds the connector fitting portion and the fitted portion in a fitted state by engaging with the locked portion provided in the fitted portion. It is good also as a structure currently provided.
According to such a configuration, the connector fitting portion and the fitted portion can be held in the fitted state by locking the lock portion and the locked portion, so that the voltage detection terminal and the electrode terminal The connection state of can be reliably maintained.
The lock part is formed as an elastically deformable lock piece extending in a cantilevered manner from the front side to the rear side in the fitting direction of the connector fitting part to the mated part, and the lock part is the insulating support When the member is attached to the unit cell group, the member is pressed and elastically deformed by being pressed, and when the insulating support member is attached to the unit cell group at a normal position, the member is elastically restored. It is good also as a structure latched with the said to-be-locked part.
According to such a structure, the lock part formed as a lock piece can be easily latched to a to-be-locked part only by mounting | wearing a single battery group with an insulation support member.
A plurality of the connector fitting portions are provided on the insulating support member, and an elastic portion is integrally provided for each region including each connector fitting portion, and the regions are arranged along the stacking direction of the unit cells. It is good also as a structure made displaceable.
According to such a configuration, each connector fitting portion is displaced along the stacking direction of the unit cells by the elastic unit, so that manufacturing tolerance and assembly tolerance among the plurality of unit cells can be absorbed.

  ADVANTAGE OF THE INVENTION According to this invention, although it is a battery module using a laminated type cell group, the voltage detection of each cell can be performed reliably.

Battery module perspective view Partial enlarged plan view of the battery module Partially enlarged front view of the battery module Partially enlarged side view of battery module The principal part expanded sectional view which shows the state which the to-be-fitted part of the cell and the connector fitting part of the wiring module for batteries fitted. The partially expanded sectional view which shows the state before the to-be-fitted part of a cell and the connector fitting part of the wiring module for batteries fit. Partially enlarged perspective view of battery wiring module Partially enlarged plan view of battery wiring module Front view of battery wiring module Partially enlarged perspective view of battery wiring module viewed from below XX sectional view of FIG. Front view of flexible printed circuit board Partially enlarged bottom view of flexible printed circuit board Partially enlarged perspective view showing a state before the flexible printed circuit board is mounted on the resin protector Partially enlarged perspective view showing a state where the flexible printed circuit board is placed on the placement portion of the resin protector Partially enlarged perspective view of single cell group Partial enlarged plan view of single cell group Front view of single cell group

<Embodiment>
An 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 power source for driving a vehicle such as an electric vehicle or a hybrid vehicle. As shown in FIG. 1, the battery module 10 includes a unit cell group 20 in which a plurality of (38 in the present embodiment) unit cells 21 are arranged side by side, and a battery wiring module 40 attached to the unit cell group 20. It is configured with. In the following description, the vertical direction is based on the vertical direction in FIG. 3, the horizontal direction is based on the horizontal direction in FIG. 3, and the front-back direction is based on the horizontal direction in FIG.

  As shown in FIGS. 1 and 2, the unit cell 21 has a flat and substantially rectangular parallelepiped shape, and a power generation element (not shown) is accommodated therein. The upper, lower, left and right side surfaces of the unit cell 21 are covered with an insulating resin portion 22 made of synthetic resin. On the upper surface of the unit cell 21, a pair of electrode terminals 80 projecting upward are provided at positions near both ends in the left-right direction. One of the pair of electrode terminals 80 is a positive electrode, and the other is a negative electrode. A thread is formed on the outer peripheral surface of the electrode terminal 80. Between the plurality of unit cells 21 arranged in the front-rear direction, a separator 23 that holds the unit cells 21 at a predetermined interval is disposed.

  The plurality of unit cells 21 are arranged so that the polarities of the electrode terminals 80 of the adjacent unit cells 21 are different. The electrodes of the adjacent unit cells 21 are electrically connected by a bus bar 81 formed by pressing a metal plate material. Specifically, the bus bar 81 is fixed to the electrode terminal 80 by a nut 82 screwed into a screw thread formed on the electrode terminal 80. Thereby, the plurality of single cells 21 are connected in series. As the metal constituting the bus bar 81, any metal such as copper, copper alloy, aluminum, aluminum alloy, stainless steel and the like can be appropriately selected as necessary. On the surface of the bus bar 81, a plating layer made of any metal such as tin, nickel, zinc, or the like can be formed as necessary.

  As shown in FIGS. 16 to 18, on the upper surface of the unit cell 21, a locking part 25 disposed on the left side of the central part in the left-right direction of the unit cell 21, and on the right side of the central part in the left-right direction of the unit cell 21. The to-be-fitted part 26 distribute | arranged to is provided.

  The locking portion 25 has a U-shape in plan view and has a form that rises upward. Moreover, the upper end part of the latching | locking part 25 is protruded and formed in the left side outward.

The fitted portion 26 has a hood shape opened upward, and extends straight upward from the bottom wall of the fitted portion 26 as shown in FIGS. 5 and 6. A battery-side terminal 27 is provided so as to project from the battery. The battery-side terminal 27 has a square pin shape, and is electrically connected to the electrode terminal 80 inside the unit cell 21 (not shown).
A locking hole 28 that penetrates the right side wall in the left-right direction is formed in the right side wall of the fitted portion 26.

  As shown in FIGS. 1 and 3, the battery wiring module 40 includes a flexible printed circuit board 41 (an example of the “collective conductive line” of the present invention) and a resin protector that surrounds the flexible printed circuit board 41 over the entire circumference. 60 (an example of the “insulating support member” of the present invention).

  As shown in FIGS. 12 to 14, a flexible printed circuit board (hereinafter also simply referred to as “FPC”) 41 is formed on one or both sides of an insulating base film made of, for example, a polyimide film or a liquid crystal film by a printed wiring technique. A plurality of conductive paths 42 are formed, and the surface of the conductive paths 42 is covered with a protective film (for example, a polyimide film). Thereby, compared with the collective conductive line formed by the wire harness in which the electric wires are bundled, the work process for bundling the electric wires can be made unnecessary, and the battery wiring module 40 can be reduced in weight. Yes.

  As shown in FIGS. 13 and 14, the FPC 41 includes an FPC main body 43 that extends in the front-rear direction, which is the stacking direction of the unit cells 21, and a plurality of protruding pieces 44 that protrude outward from the side edges of the FPC main body 43. It is configured with.

  The FPC main body 43 is formed with a plurality of conductive paths 42 extending in the front-rear direction, and the length dimension in the front-rear direction of the FPC main body 43 is larger than the length dimension in the front-rear direction of the unit cell group 20. Is also set longer. Further, on the FPC main body 43, for example, an electronic component 45 such as a voltage detection IC or a temperature sensor is mounted by reflow soldering or the like. Of the electronic components 45, the temperature sensor 45 </ b> A is mounted on the leading end portion of the lead-out piece 46 formed in the FPC main body portion 43 so as to extend in the left-right direction.

  One end of the conductive path 42 (the end on the rear side in the drawing in FIG. 13) is formed to extend on the protruding piece 44, and the other end of the conductive path 42 is connected via the electronic component 45, for example. It is connected to an ECU (not shown) or a voltage signal processing IC (not shown).

  Each protruding piece 44 is formed integrally with the FPC main body 43 and is provided for each unit cell 21 at one end in the left-right direction of the FPC main body 43 (the right end in the present embodiment). Further, the conductive path 42 formed on the protruding piece 44 is arranged at a substantially central portion in the front-rear direction of the protruding piece 44, and a voltage detection terminal 47 is connected to a terminal of the conductive path 42. Adjacent voltage detection terminals 47 are connected via an electronic component 45 such as a voltage detection IC, and the voltage signal processing IC is connected above the voltage detected by the voltage detection terminal 47 through the conductive path 42 and the electronic component 45. Etc. to be taken in.

  As shown in FIGS. 12 and 13, the voltage detection terminal 47 includes a rectangular tube-shaped connection tube portion 48 and a pair of lead portions 49 formed at one end of the connection tube portion 48.

  The pair of lead portions 49 has a form extending from one end portion of the connection tube portion 48 toward the protruding piece 44 side and extending away from each other, and the leading end portion of the lead portion 49 is the conductive path 42 of the protruding piece 44. Are connected by reflow soldering.

An elastic contact piece 48A that is elastically deformable in a direction intersecting with the direction in which the connection cylinder part 48 extends is provided inside the connection cylinder part 48. What is the side of the connection cylinder part 48 on which the lead part 49 is formed? The battery-side terminal 27 of the unit cell 21 can be inserted into the connection tube portion 48 from the opposite end. When the battery side terminal 27 is inserted into the connection cylinder portion 48, as shown in FIG. 5, the elastic contact piece 48A elastically contacts the battery side terminal 27, and the battery side terminal 27 and the elastic contact piece 48A Is connected. In addition, since the voltage detection terminal 47 is connected to the battery-side terminal 27 of the unit cell 21, information about the voltage of the unit cell 21 is taken into the electronic component 45 through the conductive path 42, and part of the information about the voltage is obtained. After being processed in the electronic component 45, the processed information is taken into an ECU (not shown) through the conductive path 42, and the voltage of each unit cell 21 is detected. That is, the battery-side terminal 27 and the elastic contact piece 48A are in elastic contact with each other, and the voltage detection terminal 47 and the battery-side terminal 27 are connected to each other, so that the voltage detection of each unit cell 21 is reliably performed. Can be done.
In addition, since the information regarding the voltage detected by the voltage detection terminal 47 is partly processed by the electronic component 45 and further processed by the voltage signal processing IC, it is delivered to the ECU. Can be reduced, and the ECU can be reduced in size. As a result, it is possible to effectively use the peripheral area of the ECU that has been occupied by the electronic components.

  The resin protector 60 is configured by arranging a plurality (four in this embodiment) of connecting units 61 made of an insulating resin in the front-rear direction. Adjacent connecting units 61 are connected by the FPC 41 while holding the FPC 41 by attaching the FPC 41.

  As shown in FIGS. 6 and 14, the connection unit 61 includes a placement portion 62 on which the FPC 41 is placed, and a cover 63 formed integrally with the placement portion 62.

  The mounting unit 62 includes a divided mounting unit 64 that is divided into a plurality of (10 in the present embodiment) in the front-rear direction, and the adjacent divided mounting units 64 adjust the gap interval between the divided mounting units 64. Are connected by a flexible hinge 65.

  As shown in FIGS. 4 and 10, the flexible hinge 65 is substantially U-shaped in a side view that can be elastically deformed in the front-rear direction connecting the opposite side edges of the adjacent divided mounting portions 64 in the front-rear direction. Is formed. Further, the flexible hinge 65 is formed integrally with the divided placement portion 64 in a form bulging downward from the lower surface of the divided placement portion 64. Further, the flexible hinge 65 is elastically deformed in the front-rear direction, so that the divided placement portions 64 are displaced in the front-rear direction, and the gap interval in the front-rear direction between the divided placement portions 64 can be increased or decreased. It is like that.

  As shown in FIGS. 14 and 15, the FPC main body 43 is placed on the left side of the center portion in the left-right direction in the divided placement portion 64. A protruding piece 44 of the FPC 41 is placed on the part. Among the divided placement portions 64, the divided placement portion 64 in which the lead-out piece 46 of the FPC main body portion 43 is disposed has a through hole 64A penetrating the divided placement portion 64 in the vertical direction.

  A connector fitting portion 66 that protrudes downward from the lower surface of the divided mounting portion 64 is formed at a portion of the divided mounting portion 64 where the protruding piece 44 is mounted. As shown in FIG. 10, the connector fitting portion 66 is formed in a block shape that is wide in the left-right direction, and is formed so as to be fitted in the fitted portion 26 of the unit cell 21. Further, inside the connector fitting portion 66, a terminal accommodating hole 67 that penetrates the connector fitting portion 66 in the vertical direction is formed.

  The terminal accommodating hole 67 is formed so as to accommodate the voltage detection terminal 47 of the protruding piece 44. As shown in FIGS. 5 and 6, the terminal accommodating hole 67 is in a state where the FPC 41 is mounted on the mounting portion 62. 67 includes a voltage detection terminal 47 accommodated from above. When the battery wiring module 40 is attached to the upper surface of the unit cell group 20, the connector fitting portion 66 is fitted into the fitted portion 26 and the voltage detection terminal 47 accommodated in the connector fitting portion 66 is connected. The battery side terminal 27 of the fitted portion 26 is inserted into the cylindrical portion 48. Then, the elastic contact piece 48 </ b> A elastically contacts the battery side terminal 27 in the connection cylinder portion 48, and the voltage detection terminal 47 and the battery side terminal 27 are connected. That is, by fitting the connector fitting portion 66 and the fitted portion 26, the voltage detection terminal 47 and the battery side terminal 27 connected to the electrode terminal 80 can be brought into a connected state.

  Further, as shown in FIGS. 6 and 9, the right side end of the connector fitting portion 66 is located from the front side (lower side in FIG. 6) to the rear side (upper side in FIG. 6) of the connector fitting portion 66. A locking piece 68 is formed extending upward in a cantilevered direction. The lock piece 68 is formed to be elastically deformable in the left-right direction, and a locking protrusion 68A that can be received in the locking hole 28 of the fitted portion 26 is formed on the right side surface of the lock piece 68. In the process of fitting the connector fitting portion 66 into the fitted portion 26, the locking piece 68 is elastically deformed by the locking projection 68A being pressed against the opening edge of the fitted portion 26, and the connector fitting When the portion 66 and the fitted portion 26 reach the proper fitted state, the locking projection 68A of the lock piece 68 is accommodated in the locking hole 28 of the fitted portion 26, so that the fitted portion 26 is received. The contact state with the opening edge is released and the elastic recovery is performed. Then, as shown in FIG. 5, the locking projection 68 </ b> A and the upper end portion 26 </ b> A of the fitted portion 26, which is the opening edge of the locking hole 28, are locked, so that the connector fitting portion 66 and the fitted portion are fitted. The part 26 is held in the fitted state.

  When the plurality of unit cells 21 are assembled in a stacked state, a deviation occurs between the unit cells 21 due to manufacturing tolerances and assembly tolerances of each unit cell 21, but a connector fitting portion 66 is formed. The divided mounting portion 64, which is a region, can be displaced in the front-rear direction by the flexible hinge 65 elastically deforming in the front-rear direction, so that the manufacturing tolerance and assembly tolerance between the cells 21 can be absorbed. Can be done.

  The cover 63 has a substantially rectangular shape that is vertically long in the front-rear direction as shown in FIGS. 7 to 10, and a plurality of flexible members formed on the right edge of the mounting portion 62 as shown in FIGS. It is formed integrally with the mounting portion 62 through a hinge 69 of the nature. Further, the cover 63 is formed so as to cover and cover the entire upper surface of the placement portion 62 by bending the hinge 69. Thereby, FPC41 is surrounded by the connection unit 61 (resin protector 60) over the perimeter, and it can prevent that another member contacts FPC41.

  On the other hand, an elastic fixing piece 70 that can be locked to the left lower edge portion of the mounting portion 62 and an elastic mounting piece 71 that can be locked to the locking portion 25 of the unit cell 21 are formed on the left edge of the cover 63. ing.

  As shown in FIGS. 10 and 11, the elastic fixing piece 70 has a form extending downward from the left edge of the cover 63 in a state where the cover 63 is closed, and a plurality of elastic fixing pieces 70 are spaced apart in the front-rear direction (this embodiment). 4) in the form. Further, the distal end portion of the elastic fixing piece 70 is formed so as to protrude inwardly (on the right side). When the cover 63 is closed, the elastic fixing piece 70 is engaged with the lower left edge portion of the mounting portion 62 to mount the cover 63. The mounting portion 62 is fixed in a closed state.

  As shown in FIGS. 3 and 11, the elastic mounting piece 71 has a form extending downward from the elastic fixing piece 70 in a state where the cover 63 is closed, and a plurality of elastic mounting pieces 71 are spaced apart in the front-rear direction (this embodiment). Two are formed in the form. Further, the distal end portion of the elastic mounting piece 71 is formed so as to protrude inwardly (on the right side), and when the battery wiring module 40 is assembled on the upper surface of the unit cell group 20, The connecting unit 61 (resin protector 60) is held and fixed to the unit cell group 20 by being locked with the tip. That is, when the battery wiring module 40 is assembled to the upper surface of the unit cell group 20, the left end portion of the battery wiring module 40 is fixed to the unit cell 21 by the elastic mounting piece 71 and the locking portion 25 being locked. The right end of the battery wiring module 40 is connected to the unit cell 21 by the locking protrusion 68A of the locking piece 68 of the connector fitting portion 66 and the opening edge of the locking hole 28 of the fitted portion 26 being locked. Fixed to. Thereby, the battery wiring module 40 can be fixed to the unit cell group 20 in a balanced manner on both the left and right sides.

  As shown in FIGS. 6 and 9, a temperature sensor mounting portion 72 that is horizontally long and protrudes inward in the left-right direction is formed on the inner surface of the cover 63 that covers the upper surface of the mounting portion 62. ing. The temperature sensor placement unit 72 is configured such that the cover 63 is closed and the lead-out piece 46 of the FPC main body 43 placed on the placement unit 62 is pressed downward through the through hole 64A, so that the temperature sensor placement unit 72 The temperature sensor 45 </ b> A is placed on the projecting end 72 </ b> A (lower end) of 72. When the battery wiring module 40 is attached to the unit cell group, as shown in FIG. 3, the temperature sensor 45 </ b> A placed on the temperature sensor placement unit 72 is arranged on the upper end surface of the unit cell 21, and the temperature Information obtained by the sensor 45A is taken into an ECU (not shown) through the conductive path 42, and the temperature of the unit cell group 20 is detected.

  The battery module 10 of the present embodiment has the structure as described above. Next, an example of an assembly procedure of the battery module 10 will be briefly described.

  First, the assembly procedure of the battery wiring module 40 will be described.

  First, as shown in FIG. 14, the connecting units 61 with the cover 63 opened are arranged in the front-rear direction, and the protruding piece 44 of the FPC 41 is on the right side of the mounting portion (the side where the connector fitting portion 66 is provided). The FPC 41 is arranged above the connecting unit 61 so as to be arranged. Then, the voltage detection terminal 47 connected to the protruding piece 44 is inserted into the terminal accommodating hole 67 of the connector fitting portion 66 from above, and the FPC 41 is placed on the upper surface of the placement portion 62 as shown in FIG.

  Next, the cover 63 is closed so as to cover the upper surface of the FPC main body portion 43 placed on the placement portion 62 of the connecting unit 61, and the elastic fixing piece 70 of the cover 63 is engaged with the lower left end portion of the placement portion 62. By stopping, the cover 63 is fixed to the mounting portion 62. At this time, the lead-out piece 46 of the FPC main body 43 is pressed downward from above by the temperature sensor mounting portion 72 of the cover 63, and as shown in FIG. 11, the protruding end 72A (lower end) of the temperature sensor mounting portion 72 45A) is mounted with the temperature sensor 45A.

  When the cover 63 is fixed to the mounting portion 62, the FPC 41 disposed in the connection unit 61 is entirely connected by the connection unit 61 (resin protector 60) as shown in FIGS. The battery wiring module 40 is completed by being enclosed and connecting the connecting units 61 by the FPC 41. Here, since FPC41 is surrounded over the perimeter by the connection unit 61 (resin protector 60), it can prevent that another member contacts FPC41.

  Next, a procedure for attaching the battery wiring module 40 to the unit cell group 20 will be described.

  As shown in FIGS. 16 and 17, the individual cells 21 are arranged side by side, and adjacent electrode terminals 80 are connected in series by a bus bar 81. Thereby, the cell group 20 is created. The completed battery wiring module 40 is assembled to the unit cell group 20 so as to be pressed from above.

  Specifically, as shown in FIG. 6, the battery wiring is disposed above the unit cell group 20 so that the connector fitting portion 66 of the battery wiring module 40 is inserted into the mated portion 26 of the unit cell 21. The module 40 is arranged, and the entire battery wiring module 40 is pressed against the unit cell group 20, thereby fitting the connector fitting portion 66 into the fitted portion 26. In this fitting process, the locking protrusion 68A of the lock piece 68 in the connector fitting portion 66 is pressed against the opening edge of the fitted portion 26, and the lock piece 68 is elastically deformed, so that the connector fitting portion 66 and the fitted portion are fitted. When the portion 26 reaches the proper fitting state, the locking projection 68A of the lock piece 68 is accommodated in the locking hole 28 of the fitted portion 26, and the opening edge portion of the locking projection 68A and the fitted portion 26 is received. Is released, the lock piece 68 is elastically restored. And the latching protrusion 68A and the opening edge part of the latching hole 28 latch, and the connector fitting part 66 and the to-be-fitted part 26 are hold | maintained in a fitting state. At this time, inside the connector fitting portion 66, the battery side terminal 27 of the fitting portion 26 is inserted into the connection tube portion 48, and as shown in FIG. 48A contacts elastically, and the battery side terminal 27 and the elastic contact piece 48A are connected. Thereby, the information regarding the voltage of the single cell 21 is taken into ECU etc. which are not illustrated through the conductive path 42 and the electronic component 45, and the voltage detection of each single cell 21 is performed reliably.

  Further, at the same time that the locking projection 68A of the lock piece 68 and the opening edge of the locking hole 28 are locked, the elastic mounting piece 71 of the cover 63 is locked to the locking portion 25 of the unit cell 21, so that the battery The wiring module 40 is fixed to the unit cell group 20. Thereby, the battery wiring module 40 is fixed with good balance on the left and right sides with respect to the unit cell group 20, and the battery module 10 is completed.

  As described above, according to this embodiment, the voltage detection terminal 47 and the battery side terminal 27 connected to the electrode terminal 80 are connected by fitting the connector fitting portion 66 and the fitted portion 26 together. Thus, the voltage of each unit cell 21 can be reliably detected. Thereby, the connection operation of the voltage detection terminal 47 and the battery side terminal 27 is easily performed as compared with the conventional battery wiring module in which the voltage detection terminal and the electrode terminal are connected by tightening the nut 82 to the electrode terminal. be able to.

  Further, by engaging the locking projection 68A of the lock piece 68 and the opening edge of the locking hole 28, the connector fitting portion 66 and the fitted portion 26 can be held in the fitted state. The connection state between the voltage detection terminal 47 and the battery side terminal 27 can be reliably maintained. Further, according to the present embodiment, the battery wiring module 40 is disposed on the upper surface of the unit cell group 20 and the battery wiring module 40 is simply pressed from above, so that the locking protrusion 68A and the locking hole of the lock piece 68 are pressed. 28 opening edges can be easily locked.

  Further, each connector fitting portion 66 can be displaced along the front-rear direction, which is the stacking direction of the unit cells 21, by the flexible hinge 65, so that manufacturing tolerances and assembly tolerances among the plurality of unit cells 21 are absorbed. can do.

<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 said embodiment, although the collective conductive line was comprised by the flexible printed circuit board 41, this invention is not limited to such an aspect, For example, you may comprise by the wire harness which bundled the electric wire. .
(2) In the above embodiment, the electronic component is mounted on the flexible printed circuit board 41. However, the present invention is not limited to such an embodiment. For example, the electronic component is mounted on the flexible printed circuit board 41. Is not mounted, and the electronic component may be installed in the ECU.
(3) In the above embodiment, the lock fitting 68 is formed in the connector fitting portion 66. However, the present invention is not limited to such a mode. For example, the lock piece is mounted on the mounting portion 62. It may be formed.

20: single cell group 21: single cell 26: fitted portion 26A: upper end portion of the fitted portion (locked portion)
40: Battery wiring module 41: Flexible printed circuit board (collective conductive line)
42: Conductive path 45: Electronic component 47: Voltage detection terminal 60: Resin protector (insulation support member)
65: Flexible hinge 66: Connector fitting portion 68: Lock piece (lock portion)
80: Electrode terminal

Claims (7)

A battery wiring module provided in a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are connected in series,
An aggregated conductive line formed by assembling a plurality of conductive paths each having a voltage detection terminal at an end; and
An insulating support member for holding the collective conductive line;
It is provided on the insulating support member, and the voltage detection terminal is accommodated inside and fitted to a fitting portion provided on the unit cell group side so that the voltage detection terminal is used as the electrode terminal of the unit cell. A battery wiring module including a connector fitting portion to be connected.   The battery wiring module according to claim 1, wherein the collective conductive line is formed of a flexible printed circuit board.   The battery wiring module according to claim 2, wherein an electronic component for processing voltage information of the single cell is mounted on the flexible printed circuit board in a state of being connected to the conductive path.   4. The battery wiring module according to claim 1, wherein the insulating support member surrounds the collective conductive line. 5.   The connector fitting portion is provided with a lock portion that holds the connector fitting portion and the fitted portion in a fitted state by engaging with the locked portion provided in the fitted portion. The battery wiring module according to any one of claims 1 to 4, wherein the battery wiring module is provided.   The lock part is formed as an elastically deformable lock piece extending in a cantilevered manner from the front side to the rear side in the fitting direction of the connector fitting part to the mated part, and the lock part is the insulating support When the member is attached to the unit cell group, the member is pressed and elastically deformed by being pressed, and when the insulating support member is attached to the unit cell group at a normal position, the member is elastically restored. The battery wiring module according to claim 5, wherein the battery wiring module is engaged with the locked part.   A plurality of the connector fitting portions are provided on the insulating support member, and a flexible hinge is integrally provided for each region including each connector fitting portion, and the regions are arranged along the stacking direction of the unit cells. The battery wiring module according to claim 1, wherein the battery wiring module is displaceable.

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