JP2013080621A - Wiring module for battery - Google Patents

Abstract

In a battery module including a stack type single battery group, a battery wiring module capable of reliably detecting the voltage of the single battery is provided.
A battery wiring module of the present invention is attached to a unit cell group connected by laminating a plurality of unit cells so that electrode terminal surfaces are in contact with each other. A collective conductive line 31 in which a plurality of conductive paths 32 arranged extending in the laminating direction are assembled, and an insulating support member 21 that holds the collective conductive line 31. The conductive path 32 has an introduction line portion 34 led out from the insulating support member 21 and introduced into a gap between adjacent unit cells 11 at one end. The introduction line portion 34 has a voltage detection terminal portion 35 and is provided so that the introduction depth into the gap between adjacent unit cells 11 can be changed.
[Selection] Figure 13

Description

  The present invention relates to a battery wiring module.

  In battery modules for electric vehicles and hybrid vehicles, a large number 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. Here, when a plurality of unit cells are connected in series or in parallel, there is a problem that if the battery characteristics such as the battery voltage are not uniform among the unit cells, the cells are deteriorated or damaged.

  Therefore, in the battery module as described above, charging and discharging are stopped before abnormality occurs in the voltage between the single cells. Therefore, each connection member has a voltage detection line for detecting the voltage of the single cell. It is connected. The voltage detection line is connected to, for example, the ECU, and the ECU detects the voltage of each single cell and stops charging and discharging before the overdischarge and overcharge states are established.

  As a structure for connecting the voltage detection line as described above to a unit cell group in which a plurality of unit cells are arranged, for example, the one described in Patent Document 1 is known.

  In this battery module, a structure is adopted in which a voltage detection terminal in which the exposed conductor of the terminal of the voltage detection line is connected by crimping is inserted into the electrode terminal of the unit cell, and the electrode terminal is tightened together with a connection member with a nut. (See FIG. 1 of Patent Document 1).

JP 2011-124176 A

  By the way, in recent years, from the viewpoint of downsizing of the battery module and the like, by arranging a plurality of unit cells having the electrode terminal surfaces of the positive and negative electrodes on the front and back, and contacting the electrode terminal surfaces of adjacent unit cells, The use of a stacked unit cell group in which unit cells are connected in series has been studied.

  When the unit cell having such a configuration is used, it is not necessary to provide a protruding electrode terminal at the upper end of the unit cell, and a connection member such as a bus bar is not required. Therefore, a battery smaller than a conventional battery module is required. Modules can be provided. However, in a unit cell group consisting of a plurality of unit cells having electrode terminal surfaces on the front and back surfaces, the electrode terminal surfaces are arranged on the outside because they are electrically connected by bringing the electrode terminal surfaces of adjacent unit cells into contact with each other. Not. Therefore, it has been necessary to examine the connection structure of members for detecting the voltage of the unit cell.

Furthermore, even in the unit cell having such a configuration, since manufacturing tolerances are set between the electrode terminals of the unit cell, in the battery module in which a plurality of unit cells are arranged, electrodes formed on adjacent unit cells The pitch between terminals may be shifted. There is a concern that the displacement of the pitch between the electrode terminals may hinder the electrical connection between the voltage detection member and the unit cell. The present invention has been completed based on the above circumstances. Then, it aims at providing the wiring module for batteries which can perform the voltage detection of a single cell reliably in a battery module provided with a laminated | stacked single battery group.

  In order to solve the above problems, the present invention is a series of a plurality of unit cells each having a positive electrode electrode surface and a negative electrode terminal surface on the front and back surfaces, so that the electrode terminal surfaces of adjacent unit cells are in contact with each other. A wiring module for a battery attached to a connected unit cell group, wherein a plurality of conductive paths arranged extending in the stacking direction of the unit cells are aggregated, and an insulation for holding the aggregated conductive line A support member, and the conductive path has, at one end thereof, an introduction line portion that is led out from the insulating support member and introduced into a gap between the adjacent unit cells, It has a feature in that it has a voltage detection terminal portion that is connected to the electrode terminal surface and detects the voltage of the unit cell, and that the introduction depth to the gap between the adjacent unit cells can be changed.

Even in the unit cell having the electrode terminal surfaces on the front and back sides, the pitch deviation between the electrode terminals may occur due to the manufacturing tolerance between the electrode terminals of the unit cell or the expansion / contraction of the unit cell. Is provided so that the depth of introduction into the gaps of the unit cells can be changed. Therefore, according to the present invention, the pitch shift between the electrode terminals is absorbed by changing the introduction depth of the introduction line portion, and the voltage detection terminal portion and the electrode terminal surface are reliably in contact with each other. Detection can be performed reliably.
As a result, according to the present invention, it is possible to provide a battery wiring module capable of reliably detecting the voltage of a single battery in a battery module including a stacked single battery group.

  Further, in the present invention, the lead-in wire portion led out from the insulating support member is introduced into the gap between the adjacent single cells, and the voltage detection terminal portion provided in the lead-in wire portion is brought into contact with the electrode terminal, so that Since the voltage detection of the battery can be performed, the connection operation of the voltage detection terminal portion can be easily performed, and the structure for voltage detection can be simplified.

The present invention may have the following configurations.
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 formed on the flexible printed board.
With such a configuration, it is possible to make the collective conductive line space-saving and lightweight rather than forming the collective conductive line with a wire harness formed by bundling a plurality of electric wires, and work to bundle the harness together Can be made unnecessary.

The insulating support member may be in the form of a film and may be configured to hold the aggregated conductive line in between.
With such a configuration, the battery wiring module can be made smaller and lighter.

The insulating support member is arranged along the stacking direction of the unit cells, and has two end edges formed at opposing positions, and the lead-in line portion alternates from the two end edges of the insulating support member. May be derived.
With such a configuration, the material picking can be improved as compared with the configuration in which the lead-in portion is derived from one end edge.

The voltage detection terminal portion may be engaged with the electrode terminal surface such that the introduction depth of the introduction line portion into the gap between the unit cells can be changed.
With such a configuration, since the voltage detection terminal portion is reliably connected to the electrode terminal surface, it is possible to further reliably detect the voltage of the unit cell.

You may be latched by the latching | locking part provided in the said cell.
With such a configuration, since the battery wiring module is locked by the locking portion, the voltage detection terminal portion can be positioned with respect to the corresponding single cell.

  ADVANTAGE OF THE INVENTION According to this invention, in a battery module provided with a laminated | stacked cell group, the battery wiring module which can perform the voltage detection of a cell reliably can be provided.

The perspective view of the battery module of Embodiment 1. Partial plan view of the battery module Partial cross section of battery module Perspective view of cell group Perspective view of battery wiring module Partial plan view of battery wiring module Partial side view of battery wiring module Front view of battery wiring module Partial plan view of aggregated conductive line Front view of voltage detection terminal Perspective view of voltage detection terminal Side view of voltage detection terminal Partial side view explaining the difference in the introduction depth of the introduction line part

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
The battery module 1 of 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 1 includes a unit cell group 10 in which a plurality (38 in this embodiment) of unit cells 11 are arranged side by side, and a battery wiring module 20 attached to the unit cell group 10. It is configured with. In the following description, the up-down direction is based on the up-down direction in FIG. 3, and the front-rear direction is the left side in FIGS. 2 and 3 as the front and the right side as the back.

  As shown in FIGS. 1 and 2, the unit cell 11 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 11 are covered with an insulating resin portion 12 made of synthetic resin, and a pair of front and rear side surfaces (both front and back sides) of the unit cell 11 are connected to be able to conduct electricity. Electrode terminals 14 and 15 are provided.

  The pair of electrode terminals 14 and 15 are made of metal and have electrode terminal surfaces 14D and 15A. Of the pair of electrode terminals 14 and 15, one electrode terminal 14 and 15 is a positive terminal, and the other electrode terminal 14 and 15 is a negative terminal. The polarities of the electrode terminals 14 and 15 arranged at the contact positions in the adjacent unit cells 11 are different.

  Of the pair of electrode terminals 14, 15, the electrode terminal 14 located on the left side (front side) in FIG. 3 has a portion protruding slightly forward from the insulating resin portion 12. This electrode terminal 14 is referred to as a first electrode terminal 14. The protruding portion of the first electrode terminal 14 is in contact with and electrically connected to the electrode terminal 15 of the adjacent unit cell 11. A terminal accommodating portion in which an upper strip of the first electrode terminal 14 is recessed from the overhanging portion, and an introduction piece 33 (details will be described later) including the metal terminal 35 and the introduction line portion 34 is accommodated. 14A is provided. The terminal accommodating portion 14A opens upward so that the introduction piece 33 can be inserted from above, and the front is open. The terminal accommodating portion 14A is formed with an engaging protrusion 14B that locks the introduction piece 33 so as to protrude outward. In the first electrode terminal 14, the wall surface 14 </ b> C of the terminal housing portion 14 </ b> A and the wall surface 14 </ b> D of the portion protruding from the insulating resin portion 12 below the terminal housing portion 14 </ b> A are electrode terminal surfaces.

  Of the pair of electrode terminals 14 and 15, the electrode terminal 15 located on the right side (rear side) in FIG. 3 has a flat shape and is flush with the insulating resin portion 12. This electrode terminal 15 is a second electrode terminal 15 and has an electrode terminal surface 15A that comes into contact with the wall surface 14D of the protruding portion of the first electrode terminal 14.

  By stacking and arranging the plurality of unit cells 11 in the front-rear direction so that the electrode terminal surface 14D of the first electrode terminal 14 of the adjacent unit cell 11 and the electrode terminal surface 15A of the second electrode terminal 15 are in contact with each other, A unit cell group 10 is configured in which a plurality of unit cells 11 are electrically connected in series.

  As shown in FIG. 2, for example, an electrode plate 16 whose front or rear surface is covered with an insulating resin portion is attached to both ends of the unit cell group 10 in the front-rear direction, and the first electrode terminal 14 and the second electrode The terminal 15 is not exposed in the front-rear direction. A fixing means such as a holding plate (not shown) is attached to the unit cell group 10, thereby maintaining the contact state between the first electrode terminal 14 and the second electrode terminal 15 of the adjacent unit cell 11. .

  As shown in FIG. 4, a pair of engagement pieces 17 (an example of a locking portion) that rises upward are formed on the upper surface of each unit cell 11. The pair of engaging pieces 17 are formed so as to be elastically deformable in the width direction of the unit cell group 10 (left and right direction in FIG. 2). A battery wiring module 20 is arranged between the pair of engagement pieces 17 as shown in FIGS. The battery wiring module 20 is positioned with respect to the unit cell group 10 by the engagement between the pair of engaging pieces 17 and the left and right ends of the battery wiring module 20.

  As shown in FIGS. 1 to 3, a battery wiring module 20 extending in the stacking direction (front-rear direction) of the unit cell group 10 is attached to the upper surface of the unit cell group 10. The battery wiring module 20 includes an insulating film 21 (“insulating support member”) made of an insulating material that holds a flexible printed circuit board 30 (hereinafter also referred to as “FPC”) and a central region 31 (FPC main body 31) of the FPC 30. Example).

  As shown in FIG. 2, the insulating film 21 has a form extending in the front-rear direction (the stacking direction of the unit cells 11) from the FPC 30, and is arranged along the stacking direction of the unit cells 11 and is formed at an opposing position. And two end edges 21A.

  The insulating film 21 is formed so as to sandwich the FPC main body 31 from the vertical direction. The two end edges 21 </ b> A arranged along the stacking direction of the unit cells 11 of the insulating film 21 substantially coincide with the two end edges 30 </ b> A arranged along the stacking direction of the unit cells 11 of the FPC main body 31. Further, it is joined to the FPC main body 31. Further, the insulating film 21 is bonded at a position outside the both end portions in the front-rear direction of the FPC main body 31, thereby protecting and holding the FPC main body 31.

  The insulating film 21 disposed on the upper side of the FPC main body 31 is formed with a plurality of electronic component protection portions 22 for protrudingly protecting an electronic component (not shown) provided on the upper surface of the FPC main body 31. ing. Thereby, it is possible to prevent other members from coming into contact with the electronic component, damaging the electronic component, peeling or dropping from the FPC 30, and the like.

  As shown in FIGS. 5 to 8, the FPC 30 is integrally formed on both sides of the FPC main body portion 31 held by the insulating film 21 and the width direction of the FPC main body portion 31, and is formed in a gap between adjacent unit cells 11. A plurality of introduction pieces 33 to be introduced.

  As shown in FIG. 9, the FPC 30 forms a plurality of conductive paths 32 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. It is set as the structure covered with the protective film (for example, film made from a polyimide). Except for FIG. 9, the illustration of the conductive path 32 is omitted.

  As shown in FIG. 2, the FPC main body 31 has a strip shape, and has two end edges 30 </ b> A that are arranged along the stacking direction of the unit cells 11 and are opposed to each other. The dimension in the longitudinal direction of the FPC main body 31 is set to be longer than the length dimension in the stacking direction of the unit cell group 10. As shown in FIG. 9, the FPC main body 31 is formed with a plurality of conductive paths 32 extending in the stacking direction of the unit cells 11 (an example of “aggregate conductive line”). One end portion of the conductive path 32 is connected to an introduction line portion 34 formed in the introduction piece 33, and an unillustrated ECU or the like is connected to the other end portion of the conductive path 32, for example. .

  The introduction piece 33 is formed for each gap between the unit cells 11, and each introduction piece 33 is formed from two end edges 21 </ b> A arranged along the stacking direction of the unit cells 11 of the insulating film 21. The thickness is alternately shifted in the front-rear direction by the thickness dimension. The introduction piece 33 is accommodated in a terminal accommodating portion 14 </ b> A formed at the upper edge of the first electrode terminal 14 of the unit cell 11 in the gap between the unit cells 11.

  As shown in FIG. 3, the depth Y of the recess of the terminal accommodating portion 14A of the first electrode terminal 14 is rearward from the front end portion of the front protruding portion 35C of the metal terminal 35 (details will be described later) provided on the introduction piece 33. The length is set to be substantially the same as the length X up to the rear end of the protrusion 35B. Here, the lengths X being substantially the same include both the case where the recess depth dimension Y of the terminal accommodating portion 14A is the same as the length X and the case where the length X is slightly smaller than the length X.

  As shown in FIGS. 5 and 9, the plurality of introduction pieces 33 form substantially U-shaped notches penetrating in the vertical direction of the FPC 30 on both sides of the central region 31 of the FPC 30, and portions surrounded by the notches are formed. It is formed by bending downward. In the present embodiment, in the two end edges 30A of the central region 31 of the FPC 30, a plurality of introduction pieces 33 aligned in a straight line in the stacking direction of the unit cells 11 are connected by both side edges 30B in the width direction of the FPC 30. It has become. Thereby, the bending of the introduction piece 33 of this embodiment can be suppressed.

  Now, in the present embodiment, as shown in FIG. 13, the introduction depth of the plurality of introduction pieces 33 into the gaps between the unit cells 11 can be changed, whereby the electrode terminals 14 and 15 of the unit cell 11 are changed. The pitch deviation between the electrode terminals 14 and 15 due to the manufacturing tolerances and assembly tolerances between them and the expansion and contraction of the battery is absorbed. Among the introduction pieces 33 shown in FIG. 13, the introduction depth P1 of the introduction piece 33 (introduction line portion 34) at the left end is the deepest, and the introduction depth P2 of the introduction piece 33 at the right end is the shallowest.

  An introduction line portion 34 is formed in each introduction piece 33. The lead-in portion 34 is integrally extended from the conductive path 32 formed in the FPC main body portion 31. The terminal of the introduction line portion 34 is connected to a metal terminal 35 (an example of a voltage detection terminal portion) formed at the end portion of the introduction piece 33.

  As shown in FIGS. 8 and 13, each introduction piece 33 is provided with a dish-like metal terminal 35 and a pair of connection detection terminals 36 arranged above the metal terminal 35. Furthermore, in addition to the metal terminal 35 and the connection detection terminal 36, a block-shaped temperature sensor 37 is provided in some of the introduction pieces 33.

  The metal terminal 35 is connected to an electrode pad (not shown) of the introduction line portion 34 formed on the introduction piece 33. Information about the voltage obtained at the metal terminal 35 is taken into an ECU or the like (not shown) through the lead-in portion 34 and the conductive path 32, and the voltage of each unit cell 11 is detected.

  As shown in FIGS. 10 to 12, the metal terminal 35 has a flange 35 </ b> A having a flange shape, and a rear protrusion 35 </ b> B that protrudes in the right direction (rear) in FIG. 12 is provided inside the periphery 35 </ b> A. . Inside the rear protrusion 35B, a front protrusion 35C protruding leftward (front) in FIG. 12 is provided. The front protrusion 35C protrudes forward from the peripheral edge 35A. A central portion of the front protruding portion 35C is hollowed out in a circular shape, and a slit 35D is formed in a cross shape from the circular hollowed out portion.

  The engagement protrusion 14B of the terminal accommodating portion 14A can be accommodated inside the front protrusion 35C of the metal terminal 35, and as shown in FIG. 3, the rear protrusion 35B of the metal terminal 35 and the terminal accommodating portion. By engaging with the engaging protrusion 14B of 14A, the metal terminal 35 is not displaced in the terminal accommodating portion 14A.

  As described above, since the introduction piece 33 is provided so that the introduction depth into the gap between the single cells 11 can be changed, the positions of the front protrusion 35C and the engagement protrusion 14B of the metal fitting of the introduction piece 33 are as follows. May shift. Therefore, in the present embodiment, even if the introduction depth of the introduction piece 33 into the gap between the single cells 11 is different depending on the introduction piece 33, the engagement protrusion 14B of the terminal accommodating portion 14A and the metal terminal 35 are provided. The gap d is formed at a predetermined interval between the front protrusion 35C of the metal fitting and the engagement protrusion 14B so that the front protrusion 35C of the metal fitting can be engaged. The front protrusion 35C is movable. That is, in the present embodiment, the metal fitting is engaged with the wall surface 14C of the terminal accommodating portion 14A so that the introduction depth of the introduction piece 33 into the gap of the unit cell 11 can be changed.

  In the present embodiment, the metal terminal 35 is configured such that the front projecting portion 35C is elastically deformed rearward by narrowing the gap interval between the slits 35D formed in the front projecting portion 35C. Accordingly, the depth Y of the recess of the terminal accommodating portion 14A is determined from the length X from the front end portion of the front protruding portion 35C of the metal terminal 35 provided on the introduction piece 33 in the natural state to the rear end portion of the rear protruding portion 35B. Is slightly smaller, or when the cell 11 expands and the recess depth dimension Y of the terminal accommodating portion 14A becomes smaller, the front protruding portion 35C of the metal terminal 35 is elastically deformed rearward, so that the terminal The first electrode terminal 14 and the second electrode terminal 15 are connected on the lower side of the accommodating portion 14A without causing a gap.

  As shown in FIG. 8, a pair of connection detection terminals 36 are provided at the left and right ends of the introduction piece 33. Each of the pair of connection detection terminals 36 is connected to a terminal of an introduction line portion 36A for connection detection different from the introduction line portion 34 for voltage detection. As shown in FIG. 3, the connection detection terminal 36 is connected to the electrode terminal of the second electrode terminal 15 together with the metal terminal 35 in the terminal accommodating portion 14 </ b> A when the battery wiring module 20 is attached to the unit cell group 10. The connection detection terminal 36 is set so as to short-circuit with the surface 15A. That is, the connection detection terminal 36 is short-circuited so that it can be detected that the metal terminal 35 and the electrode terminal surface 15A of the second electrode terminal 15 are connected to each other between the adjacent unit cells 11 in a conductive manner. It has become.

  The temperature sensor 37 is provided above the metal terminal 35 in the introduction piece 33 and between the pair of connection detection terminals 36, and is different from the voltage detection and connection detection introduction line portions 34 and 36A. 37 is connected to an introduction line portion 37A. In addition, the temperature sensor 37 can be provided in arbitrary introduction pieces 33 as needed, such as every predetermined number of introduction pieces 33.

  As shown in FIG. 3, when the battery wiring module 20 is mounted on the unit cell group 10, the temperature sensor 37 is arranged in a non-contact state with the electrode terminals 14 and 15 in the terminal accommodating portion 14A. The temperature information obtained by the temperature sensor 37 is taken into the ECU through the lead-in portion 34 and the conductive path 32, and the temperature of the unit cell group 10 is detected by the ECU. .

Next, an example of the assembly procedure of the battery module 1 of the present embodiment will be briefly described.
First, the FPC 30 is processed to produce the FPC 30 including a plurality of introduction pieces 33, electronic components, various terminals, electronic components, and the like. When the insulating film 21 is joined to the central region 31 (FPC main body 31) of the FPC 30, the battery is obtained. The wiring module 20 for use is obtained.

  At the same time as or before and after the production of the battery wiring module 20, the plurality of unit cells 11 are moved in the front-rear direction with a slight space between the unit cells 11 so that the first electrode terminals 14 are arranged on the front side. The unit cell group 10 is manufactured by stacking (stacking).

  A battery wiring module 20 is assembled to the upper surface of the unit cell group 10 from above. Specifically, the introduction pieces 33 are arranged in the gaps between the adjacent unit cells 11 to align the battery wiring module 20. Next, the gap between the cells 11 is closed, and the introduction piece 33 is inserted into the terminal accommodating portion 14 </ b> A, and the engaging protrusion 14 </ b> B of the terminal accommodating portion 14 </ b> B is engaged with the rear protruding portion 35 </ b> B of the metal terminal 35.

  When the battery wiring module 20 is assembled to the unit cell group 10, the battery wiring module 20 is engaged and positioned with the engagement piece 17 formed on the upper surface of the unit cell 11. And in the single cell group 10 which assembled | attached the wiring module 20 for batteries, as shown in FIG. 3, the metal terminal 35 provided in the introduction piece 33 is an electrode terminal of the 2nd electrode terminal 15 of the adjacent single cell 11. As shown in FIG. The surface 15A and the wall surface 14C of the terminal accommodating portion 14A are sandwiched between the second electrode terminal 15 of the unit cell 11 and the front protruding portion 35C of the metal terminal 35, and the wall surface 14C of the terminal accommodating portion 14A and the metal terminal 35. The rear projecting portion 35B comes into contact, and the metal terminal 35 is connected to the second electrode terminal 15 and the first electrode terminal 14 so as to be conductive. Thereby, the battery module 1 is completed.

  At this time, since the metal terminal 35 is accommodated in the terminal accommodating portion 14A and the metal terminal 35 and the first electrode terminal 14 are connected, the first of the adjacent unit cells 11 is located below the terminal accommodating portion 14A. There is no gap between the electrode terminal 14 and the second electrode terminal 15.

Next, the operation and effect of this embodiment will be described.
In the unit cell group 10 formed by laminating a plurality of unit cells 11 having electrode terminal surfaces 14D and 15A on the front and back sides, the electrode terminals 14, due to manufacturing tolerance and assembly tolerance of each unit cell 11, expansion / contraction of the unit cell 11, etc. Although the pitch deviation between 15 may occur, according to the present embodiment, the introduction length of the introduction piece 33 into the gap between the single cells 11 can be changed as shown in FIG. Thus, the pitch shift between the electrode terminals 14 and 15 can be absorbed.
As a result, according to the present embodiment, it is possible to provide the battery wiring module 20 that can reliably detect the voltage of the single battery 11 in the battery module 1 including the stacked single battery group 10.

  Further, in the present embodiment, the lead-in portion 34 led out from the insulating film 21 is introduced into the gap between the adjacent unit cells 11, and the metal terminal 35 provided on the lead-in portion 34 contacts the electrode terminals 14 and 15. Therefore, it is not necessary to connect the voltage detection terminal and the electrode terminal by tightening the nut as in the prior art, and the metal terminal 35 (voltage detection terminal). The connecting operation of the unit 35) can be easily performed, and the structure for voltage detection can be simplified.

  Moreover, according to this embodiment, since the number of parts of the battery wiring module 20 can be reduced as compared with the conventional battery wiring module 20 including the bus bar for connecting the electrode terminals, The manufacturing cost can be reduced, and the battery wiring module 20 can be reduced in weight.

  In particular, according to the present embodiment, the insulating support member 21 has a film shape and is configured to hold the aggregated conductive line in between, so that the battery wiring module 20 is more space-saving and lightweight. can do.

  Further, according to the present embodiment, the collective conductive line is formed by the FPC 30, and the lead-in line portion 34 is integrally extended from the conductive path 32 formed in the FPC 30, so that the collective conductive line 31 is connected to a plurality of electric wires. Rather than forming a wire harness that bundles the wires, the collective conductive line 31 can be made space-saving and lightweight, and the work of gathering the harnesses can be made unnecessary.

  In addition, according to the present embodiment, the insulating film 21 is arranged along the stacking direction of the unit cells 11 and has two end edges 21A formed at opposing positions. Since the two lead edges 21A are alternately led out, the material picking can be improved as compared with the configuration in which the lead-in portion 34 is led out from one end edge 21A.

  Further, according to the present embodiment, the metal terminal 35 is engaged with the wall surface 14C of the terminal accommodating portion 14A so that the introduction depth of the introduction wire portion 34 into the gap of the unit cell 11 can be changed. The metal terminal 35 is reliably connected to the electrode terminals 14 and 15, and the voltage detection of the cell 11 can be performed more reliably.

  Furthermore, according to this embodiment, since the battery wiring module 20 is locked by the engaging piece 17 provided in the unit cell 11, the metal terminal 35 is easily positioned with respect to the corresponding unit cell 11. be able to.

  In addition, according to the present embodiment, since the metal terminal 35 is accommodated in the terminal accommodating portion 14A and the metal terminal 35 is connected to the first electrode terminal 14 and the second electrode terminal 15, Without interposing the voltage detection terminal portion 35 between the first electrode terminal 14 and the second electrode terminal 15, the first electrode terminal 14 and the second electrode terminal 15 of the adjacent unit cell 11 can be connected, The electrical connection between the adjacent unit cells 11 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) Although the battery wiring module 20 including the collective conductive line 31 formed by the FPC 30 is shown in the above embodiment, the collective conductive line may be formed by a wire harness formed by bundling a plurality of electric wires.
(2) In the said embodiment, although the insulating film 21 was shown as an insulating support member, the insulating support member may consist of a plate-shaped insulating material.
(3) In the said embodiment, the insulating film 21 has two edge 21A formed in the position which is distribute | arranged along the lamination direction of the cell 11, and opposes, The introduction line part 34 from these two edges 21A However, the lead-in portion may be led out from one edge of the insulating film.
(4) In the above embodiment, the metal terminal 35 engaged with the electrode terminal surface 14 </ b> C is shown as the voltage detection terminal part 35 so that the introduction depth of the introduction line part 34 into the gap of the unit cell 11 can be changed. However, the present invention is not limited to this. The voltage detection terminal portion may not be engaged with the electrode terminal surface.
(5) In the above embodiment, the battery wiring module 20 that is locked by the engaging piece 17 provided in the single battery 11 is shown. However, the battery wiring module of the present invention does not have a locking portion. You may apply to the cell group which consists of.
(6) Although the voltage detection terminal part 35 accommodated in the terminal accommodation part 14A is shown in the above embodiment, the voltage detection terminal part may be sandwiched between the electrode terminal surfaces of adjacent unit cells. With such a configuration, it is not necessary to prepare another member in order to bring the voltage detection terminal portion into contact with the electrode terminal surface, so that the number of parts can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Battery module 10 ... Single cell group 11 ... Single cell 14 ... 1st electrode terminal (electrode terminal)
14B ... engaging protrusions 14C, 14D ... electrode terminal surface 15 ... second electrode terminal (electrode terminal)
15A ... Electrode terminal surface 17 ... Engagement piece (locking part)
20 ... Battery wiring module 21 ... Insulating film (insulating support member)
21A ... Edge of insulating film (arranged along the cell stacking direction) 30 ... FPC
31 ... FPC body (collective conductive line)
32 ... Conductive path 33 ... Introduction piece 34 ... Introduction line part 35 ... Metal terminal (voltage detection terminal part)
d: Clearance between front protrusion and engagement protrusion of metal terminal P1, P2, P3 ... Introduction depth of introduction piece (introduction line portion)

Claims (6)

Battery wiring attached to a group of unit cells connected in series by laminating a plurality of unit cells each having positive and negative electrode terminal surfaces on the front and back so that the electrode terminal surfaces of adjacent unit cells are in contact with each other A module,
An assembly conductive line formed by assembling a plurality of conductive paths arranged extending in the stacking direction of the unit cells, and an insulating support member holding the aggregated conductive line,
The conductive path has, at one end thereof, an introduction line portion that is led out from the insulating support member and introduced into a gap between adjacent unit cells,
The introduction line portion has a voltage detection terminal portion that is connected to the electrode terminal surface and detects the voltage of the unit cell, and is provided so that the introduction depth to the gap between the adjacent unit cells can be changed. A wiring module for a battery. 2. The battery according to claim 1, wherein the collective conductive line is formed of a flexible printed circuit board, and the introduction line portion is integrally extended from the conductive path formed on the flexible printed circuit board. Wiring module. 3. The battery wiring module according to claim 1, wherein the insulating support member has a film shape and holds the aggregated conductive line therebetween. The insulating support member has two edges formed at opposing positions arranged along the stacking direction of the unit cells,
4. The battery wiring module according to claim 1, wherein the lead-in portions are alternately led out from the two end edges of the insulating support member. 5. The said voltage detection terminal part is engaged with the said electrode terminal surface so that change of the introduction depth to the clearance gap between the said cell of the said introduction line part is possible. The battery wiring module according to any one of the above. The battery wiring module according to any one of claims 1 to 5, wherein the battery wiring module is locked by a locking portion provided in the unit cell.

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