JP2013093307A - Wiring module for cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring module for cell capable of facilitating voltage detection of each electric cell.SOLUTION: A wiring module 40 for cell provided in an electric cell group 20 consisting of a series connection of a plurality of electric cells 21 each having the electrode terminals 80 of positive electrode and negative electrode includes a flexible printed wiring board 41 formed by aggregating a plurality of conducting paths 42 extending in the cross direction, introduction pieces 44 provided on the flexible printed wiring board 41 while having an introduction line 45 formed integrally with the conducting path 42, a resin protector 60 for holding the flexible printed wiring board 41, and electrode pads 46 which are provided in the introduction line 45 and are brought into connection state with cell side terminals 30 when they are held elastically by a spring member 27 provided in the electric cell 21 along with the cell side terminals 30 provided therein.

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 each having a positive electrode electrode and a negative electrode terminal 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-described circumstances, and an object thereof is to provide a battery wiring module capable of easily connecting a voltage detection terminal and an electrode terminal.

  As 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. A collective conductive line formed by assembling a plurality of conductive paths formed extending in the stacking direction, an introduction line portion provided at one end of the conductive path, and arranged for each predetermined number of the unit cells, An insulating support member that holds the collective conductive line, and is provided in the lead-in portion, and is provided along the battery-side terminal provided in the unit cell, connected to the electrode terminal, and provided in the unit cell. It is characterized in that it includes a voltage detection terminal that comes into contact with the battery side terminal by being urged toward the battery side terminal by the biasing means.

According to the battery wiring module having such a configuration, the voltage detection terminal and the battery side terminal can be brought into a connected state by urging the voltage detection terminal by the urging means.
Moreover, the voltage detection terminal is arranged along the battery side terminal, and the voltage detection terminal and the battery side terminal can be connected by urging the voltage detection terminal by the urging means, so that the nut is connected to the electrode. Compared to the conventional battery wiring module in which the voltage detection terminal and the electrode terminal are connected by tightening to the terminal, the voltage detection terminal and the electrode terminal can be easily connected.

The following configuration is preferable as an embodiment of the present invention.
The collective conductive line may be formed of a flexible printed board, and the lead-in portion may be integrally extended from the conductive path of the flexible printed board.
According to such a configuration, a work process for bundling electric wires becomes unnecessary and the battery wiring module can be reduced in weight, compared to a collective electric wire path formed by a wire harness that bundles electric wires.

The voltage detection terminal may be formed by exposing a metal foil at an end portion of the lead-in portion.
According to such a configuration, the number of parts can be reduced and the number of work steps for mounting the metal terminal on the conductive wire portion can be reduced as compared with the case where a separate metal terminal is connected on the conductive wire portion. Therefore, the manufacturing cost of the battery wiring module can be reduced.

The insulating support member may be configured to surround the collective conductive line.
There is a risk that the conductive path may be disconnected 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 over the entire circumference. It is possible to prevent other members from coming into contact with the conductive line.

The biasing means is open to the insulating support member side and is housed in a housing portion provided in the unit cell, and elastically connects the voltage detection terminal and the battery side terminal inserted from the insulating support member side. A spring member that urges the voltage detection terminal to the battery-side terminal by being sandwiched between the insulating support member, the mounting portion that mounts the collective conductive line, and is assembled to the unit cell group The mounting portion includes a jig insertion hole for inserting a jig for operating the spring member from a side opposite to the unit cell side when the mounting unit is assembled to the unit cell group. It may be configured to have.
According to such a configuration, since the jig can be inserted from the jig insertion hole and the spring member accommodated in the accommodating portion can be operated, without complicating the structure of the unit cell group, The battery side terminal can be easily held by the spring member.

The insulating support member is provided with a first cover portion covering a surface of the collective conductive line opposite to the unit cell side, and a flexible hinge on the first cover portion, and the jig insertion It is good also as a structure provided with the 2nd cover part which covers the surface on the opposite side to the said cell side of a hole.
According to such a configuration, after attaching the battery wiring module to the unit cell group in a state in which the collective conductive line is protected by the first cover part, after removing the jig from the jig insertion hole, by the second cover part, The periphery of the jig insertion hole can be protected. Thus, it is possible to protect the collective conductive line from the stage before mounting the battery wiring module to the unit cell group, and finally cover the jig insertion hole with the second cover part, so that the entire collective conductive line Can be protected.

A battery module comprising: a single battery that is a spring member that elastically holds the voltage detection terminal and the battery side terminal in a state where the biasing means is connected; and the battery wiring module.
According to the battery module having such a configuration, since the voltage detection terminal and the battery side terminal can be elastically sandwiched and connected, compared to a spring member in which the biasing means biases only the voltage detection terminal, The voltage detection terminal and the battery side terminal can be reliably connected.

  According to the present invention, voltage detection of each unit cell can be easily performed.

Battery module perspective view Partial enlarged plan view of the battery module Front view of battery module Partially enlarged side view taken along line IV-IV in FIG. The principal part expanded sectional view which shows the state by which the battery wiring module was mounted | worn in the cell group, and the battery side terminal and the electrode pad were connected The principal part expanded sectional view which shows the state before the battery wiring module is mounted to the single cell group and before the battery side terminal and the electrode pad are connected. Partially enlarged perspective view of battery wiring module Front view of battery wiring module Partially enlarged side view of battery wiring module The partially expanded perspective view which shows the state by which the 2nd cover part of the wiring module for batteries was open | released The partially expanded plan view which shows the state by which the 2nd cover part of the wiring module for batteries was open | released XII-XII line sectional view of FIG. The perspective view which shows the state before mounting | wearing a flexible printed circuit board with a resin protector. The perspective view which shows the state in which the flexible printed circuit board was mounted in the resin protector Partial enlarged plan view of flexible printed circuit board Front view of flexible printed circuit board Partially enlarged perspective view of single cell group Partial enlarged plan view of single cell group XIX-XIX sectional view of FIG. Perspective view of spring member

<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, 17, and 18, the unit cell 21 has a flat, 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. 17 and 18, on the upper surface of each unit cell 21, a module receiving portion 25 disposed on the left side of the central portion in the left-right direction of the unit cell 21 and the central portion in the left-right direction of the unit cell 21 An accommodation portion 26 arranged on the right side is provided.
The module receiving portion 25 has a block shape, and a receiving portion-side concave portion 25 </ b> A that opens upward and toward the accommodating portion 26 is formed in the upper portion of the module receiving portion 25.

  The accommodating portion 26 has a hood shape opened upward, and a spring member 27 (an example of the “biasing means” of the present invention) is disposed inside the accommodating portion 26 as shown in FIGS. 5, 6, and 17. Is housed.

  The spring member 27 is formed by pressing a metal plate material having excellent spring properties such as stainless steel. Further, as shown in FIGS. 6 and 20, the spring member 27 forms a rectangular through hole 29 penetrating in the thickness direction at one end 28A of a long and thin flat metal plate 28, and the metal plate 28 is bent. The other end 28 </ b> B of the metal plate 28 is formed through the through hole 29. The spring member 27 is configured such that a gap between the front edge 29A of the through hole 29 and the other end 28B of the metal plate 28 is increased by pressing one end 28A of the metal plate 28 from above. .

  Protruding pieces 28 </ b> C projecting outward are formed at both ends in the width direction of the metal plate 28 of the spring member 27. On the other hand, as shown in FIG. 19, spring engaging portions 26A that can be engaged with the protruding pieces 28C of the spring member 27 are formed on both sides in the left-right direction on the inner surface of the accommodating portion 26, respectively. The spring member 27 is held in the accommodating portion 26 by the portion 26A and the protruding piece 28C being locked to each other.

As shown in FIGS. 5 and 6, a battery side terminal 30 that rises straight up from the bottom wall of the accommodating portion 26 is inserted into the through hole 29 of the spring member 27, and the battery side terminal 30 is a metal plate 28. The other end 28 </ b> B is disposed between the front edge 29 </ b> A of the through hole 29 and the other end 28 </ b> B of the metal plate 28 so as to be along the front surface of the other end 28 </ b> B.
The battery-side terminal 30 has a flat plate shape, and is connected to the electrode terminal 80 of the unit cell 21 (not shown).

  On the wall portion on the module receiving portion 25 side (left side) of the receiving portion 26, a receiving portion-side concave portion 26B that opens upward and on the module receiving portion 25 side is formed. As shown in FIG. 18, the accommodating portion-side recess 26 </ b> B is arranged to face the receiving portion-side recess 25 </ b> A of the module receiving portion 25.

  As shown in FIGS. 4 and 17, a block-shaped battery side locking portion 31 is formed on the right side of the housing portion 26. The battery side locking portion 31 has a shape that is open in a substantially rectangular shape upward, and the battery side locking claw that protrudes inwardly at the upper end of the right side wall of the battery side locking portion 31. 31A is formed.

As shown in FIGS. 1 and 3, a battery wiring module 40 extending in the front-rear direction is attached to the upper surface of the unit cell group 20.
The battery wiring module 40 includes a flexible printed circuit board 41 (an example of an “aggregate conductive line” of the present invention) and a resin protector 60 (an “insulating support member” of the present invention) that surrounds the flexible printed circuit board 41 over the entire circumference. For example).

  As shown in FIG. 15, a flexible printed circuit board (hereinafter also simply referred to as “FPC”) 41 has a plurality of conductive layers 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 path 42 is formed, and the surface of the conductive path 42 is covered with a protective film (for example, a polyimide film). In FIG. 13 and FIG. 14, the conductive path 42 is not shown.

  As shown in FIGS. 7 and 13, the FPC 41 includes an FPC main body 43 that extends in the front-rear direction, which is the stacking direction of the single cells 21, and a plurality of introduction pieces 44 that are integrally formed with the FPC main body 43. It is configured.

As shown in FIG. 15, the FPC main body 43 is formed in a form in which a plurality of conductive paths 42 extending in the front-rear direction are gathered, and the length dimension of the FPC main body 43 in the front-rear direction is the unit cell group 20. It is set longer than the length dimension in the front-rear direction.
In addition, a plurality of rectangular insertion holes 43A penetrating the FPC main body 43 in the vertical direction are formed in a substantially central portion in the left-right direction of the FPC main body 43 so as to be arranged at intervals in the front-rear direction. In addition, an introduction line portion 45 of an introduction piece 44 described later is formed at a terminal on the rear side of the conductive path 42 in the FPC main body 43, and an ECU (not shown) is connected to the terminal on the front side of the conductive path 42, for example. It has come to be.

  Each introduction piece 44 is provided for each unit cell 21 at one end portion in the left-right direction of the FPC main body portion 43 (right end portion in the present embodiment). Each introduction piece 44 protrudes in a direction away from the FPC main body 43 and is formed in a strip shape extending downward from the front end edge thereof.

  Each introduction piece 44 is formed with an introduction line portion 45, and this introduction line portion 45 extends from a rear end of the conductive path 42 of the FPC main body 43 and is integrally formed. The introduction line portion 45 extends, for example, from the rear end portion of the conductive path 42 in the FPC main body portion 43 toward the introduction piece 44 and extends downward from the side end portion of the introduction piece 44. It is extended and formed so that it may be distribute | arranged to the substantially horizontal center part.

  An electrode pad (an example of the “voltage detection terminal” of the present invention) 46 is provided at the lower end portion of the introduction line portion 45 on the front surface of the introduction piece 44. The electrode pad 46 has a substantially rectangular shape, and is formed by removing the protective film covering the surface of the introduction piece 44 to expose the metal foil on the introduction piece 44.

  Further, as shown in FIG. 5, the electrode pad 46 is assembled with the battery wiring module 40 on the upper surface of the unit cell group 20, and the introduction piece 44 of the FPC 41 is inserted into the through hole 29 of the spring member 27 of the unit cell 21. Thus, it is arranged along the front surface of the battery-side terminal 30 of the unit cell 21. Then, the electrode pad 46 has a metal plate 28 and the leading edge 29A of the through-hole 29 together with the battery-side terminal 30 due to the elastic force that the metal plate 28 is elastically restored in the through-hole 29 of the spring member 27. The other end 28B of 28 is elastically clamped from both sides in the front-rear direction. Accordingly, the electrode pad 46 is urged toward the battery side terminal 30, and the battery side terminal 30 is urged toward the electrode pad 46, so that the electrode pad 46 and the battery side terminal 30 are connected so as to be conductive. . In addition, the electrode pad 46 is connected to the battery-side terminal 30 of the unit cell 21 so as to be conductive, so that information regarding the voltage of the unit cell 21 is taken into an ECU (not shown) through the lead-in portion 45 and the conductive path 42. The voltage of each cell 21 is detected. That is, the electrode pad 46 and the battery-side terminal 30 are elastically sandwiched by the spring member 27, and the electrode pad 46 and the battery-side terminal 30 are connected so as to be conductive, thereby detecting the voltage of each unit cell 21. It can be done reliably.

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. 7 and 13, the connection unit 61 includes a placement unit 62 on which the FPC 41 is placed, and a cover 63 that covers the upper surface of the placement unit 62.

  The mounting portion 62 has a vertically long form in the front-rear direction. The mounting portion 62 includes a plurality (two in the present embodiment) of engagement holes 64 and a plurality (10 in the present embodiment) of jigs. A tool insertion hole 65 is formed.

  As shown in FIG. 13, the engagement hole 64 has a substantially rectangular shape and is formed so as to penetrate the mounting portion 62 in the vertical direction. Further, the engagement hole 64 is disposed at a position corresponding to the insertion hole 43 </ b> A of the FPC main body 43 at the substantially central portion in the left-right direction of the placement portion 62.

  The jig insertion hole 65 is a hole for inserting a jig for operating the spring member 27 from above the connection unit 61 when the battery wiring module 40 is assembled to the unit cell group 20. As shown in FIGS. 10 and 11, the jig insertion hole 65 has a substantially rectangular shape, and is formed so as to penetrate the mounting portion 62 in the vertical direction, like the engagement hole 64. In addition, the jig insertion hole 65 is formed at one end portion in the left-right direction of the placement portion 62 (right end portion in the present embodiment) corresponding to the introduction piece 44 of the FPC 41. Further, as shown in FIGS. 5 and 6, the introduction piece 44 is inserted into the jig insertion hole 65 from the upper side to the lower side.

  As shown in FIGS. 4, 8, and 9, a pair of engaging protrusions 66 that protrude to the left and right sides are formed for each unit cell 21 at the lower portion of the mounting portion 62. When the battery wiring module 40 is mounted on the unit cell group 20, the engagement protrusion 66 is accommodated between the accommodating part side recess 26B and the receiving part side recess 25A of each unit cell 21, and the unit cell. The battery wiring module 40 is positioned with respect to the group 20 so as not to be displaced from front to back and from side to side. Thereby, the introduction piece 44 of the FPC 41 can be arranged with respect to each unit cell 21 without being displaced.

  As shown in FIGS. 7, 10, and 14, the cover 63 covers the first cover portion 67 that covers the upper surface of the placement portion 62 and the upper surface of the jig insertion hole 65 that is opposite to the unit cell 21 side. The second cover portion 68 is provided.

  The first cover portion 67 has a rectangular plate shape that is vertically long in the front-rear direction, and is integrally formed on the left edge of the placement portion 62 via a flexible first hinge 69. The first cover portion 67 can be disposed above the placement portion 62 so as to cover the upper surface of the placement portion 62 by bending and deforming the first hinge 69.

A plurality of pairs of elastic legs 70 (in this embodiment) engaged with the respective engagement holes 64 of the mounting portion 62 are provided at positions on the side edge portion of the first cover portion 67 opposite to the first hinge 69. 2) formed.
The pair of elastic legs 70 can be elastically deformed in a direction in which both elastic legs 70 are brought close to each other, and the elastic legs 70 are elastically deformed to be inserted into the engagement holes 64 from above, so that the elastic legs 70 are elastic. By returning, the tip ends of both elastic legs 70 are formed to engage with the lower peripheral edge of the engagement hole 64. Thereby, the upper surface of the mounting portion 62 is covered by the first covering portion 67, and the tip end portions of the both elastic legs 70 and the lower peripheral edge portion of the engaging hole 64 are engaged, as shown in FIG. The first cover portion 67 is fixed to the placement portion 62 so that it cannot be opened. The two elastic legs 70 are also inserted into the insertion holes 43A of the FPC main body 43 when being inserted into the engagement holes 64, and are positioned so that the FPC main body 43 does not move in the connecting unit 61. .

The second cover portion 68 is integrated with a flexible second hinge (an example of the “hinge” of the present invention) 71 at a position opposite to the first hinge 69 on the side edge of the first cover portion 67. Is formed.
As shown in FIGS. 10 and 11, the second cover portion 68 has an elongated shape in the front-rear direction, and the second hinge 71 is bent and deformed so that only the second cover portion 68 is opened. be able to. Thereby, after the first cover part 67 is held and fixed to the mounting part 62 so as not to be opened, the upper surface of the mounting part 62 can be covered with the second cover part 68 independently of the first cover part 67. It is like that. That is, after the resin protector 60 in which the upper surface of the FPC main body 43 is covered with the first cover portion 67 is disposed on the upper surface of the unit cell group 20, the upper surface of the jig insertion hole 65 can be covered with the second cover portion 68. It can be done.

  An elastic locking piece 72 that is elastically deformable in the left-right direction is formed at a position on the side edge of the second cover portion 68 opposite to the second hinge 71. As shown in FIGS. 7 to 9, the elastic locking piece 72 extends downward from the side edge of the second cover portion 68 in a state where the second cover portion 68 covers the upper surface of the jig insertion hole 65. It is formed so that it can be inserted into the battery side locking portion 31 of the unit cell 21. A locking claw 72 </ b> A that protrudes outward on the right side is formed at the tip of the elastic locking piece 72. The locking claw 72A is formed so as to be able to be locked with the battery side locking claw 31A of the battery side locking portion 31 in the unit cell 21. Thereby, the locking claw 72A of the elastic locking piece 72 is inserted into the battery side locking portion 31, and the locking claw 72A and the battery side locking claw 31A are locked, as shown in FIG. The connection unit 61 (resin protector 60) is held and fixed to the unit cell group 20.

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. 13, the connecting units 61 with the cover 63 opened are arranged in the front-rear direction, and an FPC 41 in which an introduction piece 44 is formed at one end of the FPC main body 43 is prepared. Then, the introduction piece 44 of the FPC 41 is inserted into the jig insertion hole 65 formed in the mounting portion 62, and the FPC 41 is mounted on the upper surface of the mounting portion 62 as shown in FIG.

  Next, the first cover portion 67 is arranged on the mounting portion 62 so as to cover the upper surface of the FPC main body portion 43 mounted on the mounting portion 62 of the connecting unit 61, and the insertion hole 43 </ b> A of the FPC main body portion 43 is connected to the first through hole 43 </ b> A. The elastic leg 70 is inserted through the engagement hole 64 of the cover 67 and the tip of the elastic leg 70 is engaged with the lower peripheral edge of the engagement hole 64 as shown in FIG. The cover portion 67 is fixed to the placement portion 62 so that the cover portion 67 cannot be opened. Thus, the FPC main body 43 disposed in the connection unit 61 is surrounded by the connection unit 61 (resin protector 60) over the entire circumference as shown in FIGS. Are connected by the FPC 41 to complete the battery wiring module 40. Here, the FPC main body 43 is positioned in the connection unit 61 by inserting the elastic leg 70 through the insertion hole 43A, and is surrounded by the connection unit 61 (resin protector 60) over the entire circumference. The FPC main body 43 can be protected so as not to be damaged by coming into contact with other members.

Next, a procedure for attaching the battery wiring module 40 to the unit cell group 20 will be described.
As shown in FIGS. 6, 17, and 18, 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, the battery wiring module 40 with the second cover 68 opened above the unit cell group 20 is prepared, and each introduction of the battery wiring module 40 to the spring member 27 of each unit cell 21 is prepared. It arrange | positions so that the piece 44 may be arranged. Next, a jig (not shown) is inserted into the jig insertion hole 65 from above the resin protector 60, and one end 28A of the metal plate 28 of the spring member 27 is pressed from above, so that the front edge 29A of the through hole 29 and the battery side The introduction piece 44 is inserted into the enlarged gap between the terminals 30. Then, when the introduction piece 44 can be inserted between the front edge 29A of the through hole 29 and the battery side terminal 30, the jig is pulled out. Thus, the introduction piece 44 and the battery side terminal 30 are elastically sandwiched between the front edge 29A of the through hole 29 and the other end 28B of the metal plate 28, so that the electrode pad 46 and the battery side terminal 30 can be electrically connected. Connected. 6 shows a state in which the second cover portion 68 covers the upper surface of the jig insertion hole 65, and when the jig is inserted into the jig insertion hole 65, the second cover portion 68 is opened.

  Finally, the upper surface of the jig insertion hole 65 from which the jig has been pulled out is covered with the second cover portion 68, and the elastic locking piece 72 is inserted into the battery side locking portion 31, whereby the locking claw 72A and the battery The side locking claw 31A is locked. Thereby, as shown in FIG. 4, the battery wiring module 40 is held and fixed to the unit cell group 20, and the battery module 10 is completed.

  By the way, 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. Since 44 is formed of a flexible printed circuit board, the manufacturing tolerance and the assembly tolerance between the single cells 21 can be absorbed by moving the bending position of the introduction piece 44 back and forth.

As described above, according to the present embodiment, the introduction piece 44 and the battery side terminal 30 are elastically held by the spring member 27, and the electrode pad 46 and the battery side terminal 30 are urged so as to contact each other. Thus, the electrode pad 46 and the battery-side terminal 30 can be connected so as to be conductive. Thereby, the voltage detection of each cell 21 can be performed reliably.
In addition, the introduction piece 44 is arranged along the battery side terminal 30, and the introduction piece 44 and the battery side terminal 30 are elastically held by the spring member 27, so that the electrode pad 46 and the battery side terminal 30 are connected to each other. Thus, unlike the conventional case, there is no need to tighten the nut 82 to the electrode terminal to connect the voltage detection terminal and the electrode terminal, and the connection work between the electrode pad 46 and the battery side terminal 30 is easy. Can be implemented.

  In addition, according to the present embodiment, since the electrode pad 46 formed by exposing the metal foil on the introduction piece 44 is connected to the battery-side terminal 30, a separate metal terminal is provided on the conductive wire portion. Since the number of parts of the battery wiring module 40 can be reduced and the number of work steps for mounting the metal terminals on the conductive wire portion can be reduced as compared with the connected one, the manufacturing cost of the battery wiring module 40 can be reduced. Can be reduced.

Moreover, according to this embodiment, since the jig insertion hole 65 for inserting a jig into the resin protector 60 is formed, the jig is inserted from above the resin protector 60 and the spring member 27 is operated. Therefore, the electrode pad 46 and the battery-side terminal 30 can be easily held by the spring member 27 without complicating the structure of the unit cell 21.
In addition, according to the present embodiment, the use of the flexible printed circuit board 41 eliminates the need for a work process for bundling electric wires as compared to the collective conductive line formed by the wire harness bundling the electric wires, and the battery wiring module 40. Can be made lighter.

  Furthermore, according to the present embodiment, the FPC main body 43 and the jig insertion hole 65 can be individually covered by the first cover 67 and the second cover 68, so that the FPC main body 43 is protected. Since the battery wiring module 40 is arranged on the upper surface of the unit cell group 20 and the jig is removed from the jig insertion hole 65, the upper surface of the jig insertion hole 65 can be covered with the second covering portion. Thus, the entire FPC 41 can be protected over the entire circumference.

<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 introduction piece 44 and the battery side terminal 30 are elastically sandwiched by the spring member 27, so that the electrode pad 46 and the battery side terminal 30 are connected. The invention is not limited to such an embodiment, and for example, the introduction piece 44 may be biased against the battery-side terminal 30 by a leaf spring or the like.
(3) In the above embodiment, the protective film of the introduction piece 44 is removed, and the voltage detection terminal is configured by exposing the metal foil. However, the present invention is not limited to such an embodiment. You may comprise a voltage detection terminal by removing the protective film of the piece 44 and connecting a separate metal terminal to the exposed metal foil.
(4) In the above embodiment, the FPC main body 43 and the jig insertion hole 65 are individually covered by the first cover 67 and the second cover 68, but the present invention is limited to such a mode. For example, the FPC main body 43 and the jig insertion hole 65 may be collectively covered with a single cover.

20: Cell group 21: Cell 26: Housing 30: Battery side terminal 40: Battery wiring module 41: Flexible printed circuit board (collective conductive line)
42: Conductive path 45: Lead-in line part 46: Electrode pad (voltage detection terminal)
60: Resin protector (insulation support member)
65: Jig insertion hole 67: First covering portion 68: Second covering portion 71: Second hinge (hinge)
72: Spring member (biasing means)
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,
A collective conductive line formed by aggregating a plurality of conductive paths formed extending in the stacking direction of the unit cells;
An introduction line portion provided at one end of the conductive path and arranged for each predetermined number of the unit cells;
An insulating support member for holding the collective conductive line;
Provided in the lead-in line section, arranged along the battery side terminal provided in the unit cell connected to the electrode terminal, and attached to the battery side terminal side by an urging means provided in the unit cell. A battery wiring module comprising a voltage detection terminal that is brought into contact with the battery side terminal by being energized.   2. The battery wiring module according to claim 1, wherein the collective conductive line is formed of a flexible printed board, and the lead-in portion extends integrally from the conductive path of the flexible printed board.   The battery wiring module according to claim 2, wherein the voltage detection terminal is formed by exposing a metal foil at an end portion of the lead-in portion.   4. The battery wiring module according to claim 1, wherein the insulating support member surrounds the collective conductive line. 5. The biasing means is open to the insulating support member side and is housed in a housing portion provided in the unit cell, and elastically connects the voltage detection terminal and the battery side terminal inserted from the insulating support member side. A spring member that biases the voltage detection terminal against the battery side terminal by being sandwiched between,
The insulating support member includes a mounting portion that mounts the collective conductive line and is assembled to the unit cell group,
The mounting portion has a jig insertion hole for inserting a jig for operating the spring member from the side opposite to the unit cell side when the mounting unit is assembled to the unit cell group. The battery wiring module according to claim 1, wherein the battery wiring module is a battery wiring module.   The insulating support member is provided with a first cover portion covering a surface of the collective conductive line opposite to the unit cell side, and a flexible hinge on the first cover portion, and the jig insertion The battery wiring module according to claim 5, further comprising a second cover portion that covers a surface of the hole opposite to the unit cell side.   7. The unit cell according to claim 1, wherein the biasing unit is a single cell that is a spring member that elastically clamps the voltage detection terminal and the battery-side terminal in a connected state. A battery module comprising a battery wiring module.

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