JP2013097896A - Wiring module for battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a voltage detection line from being floated up.SOLUTION: A wiring module for a battery includes: a plurality of detection electric wires 23 which detect the state of a single battery group at the terminal; and a protector 30 including an electric wire housing groove 33 in which the detection electric wire 23 group is housed. The protector 30 includes: an electric wire leading-out groove 34 from which the detection electric wire 23 in the electric wire housing groove 33 is led-out to the single battery group side; a lid part 40 for covering the electric wire housing groove 33 and the electric wire leading-out groove 34; and an electric wire restriction part 43 which is protrusively provided on the rear side of the lid part 40 and restricts floating up of the detection wire 23 by narrowing a space in the electric housing groove 33 or the electric wire leading-out groove 34 when the lid part 40 is closed.

Description

  The present invention relates to a battery wiring module.

  2. Description of the Related Art Battery modules for electric vehicles and hybrid vehicles are arranged by stacking a plurality of unit cells each having a flat main body having a power generation element inside and positive and negative electrodes. A plurality of single cells are connected in series or in parallel by connecting the electrodes of the adjacent single cells with a connecting member.

  Patent Document 1 listed below describes a battery wiring module including a connection member, a voltage detection line for measuring the voltage of a single cell, and a base portion that houses the connection member and the voltage detection line. By attaching this battery wiring module to the unit cell group, inserting the electrode terminal of each unit cell into the terminal insertion hole formed in each connection member, and screwing and tightening the nut, The batteries are electrically connected.

JP 2011-008957 A

  By the way, the cover part which covers the upper part of the accommodated voltage detection line so that opening and closing is possible is attached to the one side wall of the base part disclosed by patent document 1, and can protect a voltage detection line. However, according to such a configuration, there is a possibility that the voltage detection line may be sandwiched between the cover and the cover when the lid is closed with the voltage detection line arranged in the base part floating. For this reason, it is conceivable to provide a wire restraint in the wiring path that prevents lifting when the voltage detection line is wired in the base, but there is room for further improvement because the workability at the time of wiring decreases. there were.

  This invention is completed based on the above situations, Comprising: It aims at providing the wiring module for batteries provided with the cover part which can prevent the floating of a voltage detection line.

  The present invention is a battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode portions are arranged, and a plurality of detection electric wires for detecting the state of the unit cell group at a terminal, A protector including an electric wire receiving groove for receiving the detection electric wire group, and the protector includes an electric wire lead-out groove for leading the detection electric wire in the electric wire receiving groove to the unit cell group side, and the electric wire. A lid that covers the housing groove and the wire lead-out groove, and the detection wire is lifted by narrowing the space in the wire housing groove or the wire lead-out groove when projecting on the back side of the lid and closing the lid And an electric wire restricting portion for restricting the power.

  According to such a configuration, by closing the lid portion, it is possible to prevent the plurality of detection wires housed in the wire housing groove or the wire lead-out groove from floating, and to restrict the movement of the detection wire itself. As a result, even when mounted on a vehicle such as an automobile that is susceptible to vibrations, the detection wires move around due to the vibration, and the detection wires may be damaged due to wear or the like. It is possible to prevent problems such as stress concentration and connection reliability being lowered.

  Moreover, the workability | operativity at the time of accommodating a detection electric wire in an electric wire accommodation groove | channel or an electric wire extraction groove | channel can be improved by protrudingly providing an electric wire control part in the back surface side of a cover part. That is, when a wire restraint that prevents the detection wire from floating up is provided in the wire housing groove or the wire lead-out groove itself (for example, when a slit is provided in the upper portion of the wire housing groove and the slit is inserted to accommodate the detection wire) However, the workability was poor, such as the need to push the detection wire into the wire receiving groove or the wire outlet groove. In contrast, according to the present invention, since the detection electric wire can be suppressed to the bottom side of the electric wire accommodation groove simultaneously with the operation of closing the lid portion, the operation of accommodating can be made easier.

  The electric wire restricting portion may include a convex electric wire restricting protrusion disposed on the detection electric wire when the lid portion is closed. According to such a configuration, the detection electric wire can be pushed into the electric wire receiving groove or the electric wire outlet groove by the convex electric wire regulating protrusion while the cover portion is closed (before the cover portion is completely closed). Further, the detection electric wire can be prevented from being damaged at the time of accommodation without the detection electric wire being sandwiched between the lid portion and the electric wire accommodation groove or the electric wire outlet groove.

  The protector houses a detection terminal connected to the end of the detection wire, and the detection terminal includes a main body portion and a connection portion connected to the end of the detection wire, and the wire restriction The part may include a connection part restricting part disposed on the connection part accommodated in the wire lead-out groove when the lid part is closed. Usually, the sensing wire and the sensing terminal are made of different materials, that is, have different physical properties. Therefore, when vibration or the like is applied from the outside, stress tends to concentrate on the connecting portion (connecting portion). Therefore, by restricting the movement of the connecting portion accommodated in the wire lead-out groove by the connecting portion restricting portion, it is possible to suppress problems such as a decrease in connection reliability.

  Moreover, since the connection part and the terminal of the detection wire connected to the connection part are accommodated in the wire lead-out groove by bending the detection wire accommodated along the wire accommodation groove, the connection part and the detection wire The terminal generates a reaction force that tends to return to the side of the wire housing groove in which most of the detection wires are housed. Due to this reaction force, the terminal and the connection portion of the detection wire are particularly likely to be lifted, so that the lifting of the entire detection wire can be effectively suppressed by restricting the lift by the connection portion restricting portion.

  The wire receiving groove has a pair of groove wall portions that rises along the wiring direction of the detection wire, and the lid portion is provided integrally with the groove wall portion via an integral hinge, and the connection portion. The restricting portion may include a protruding piece extending from an end edge of the lid portion opposite to the integral hinge. According to such a structure, since the cover part is integrally formed with respect to the electric wire receiving groove, it is possible to improve the manufacturing efficiency by reducing the number of parts and shortening the manufacturing process. In addition, by using the connecting portion restricting portion as a projecting piece, the amount of material necessary to form the connecting portion restricting portion can be reduced as compared with a lump like a convex portion. Furthermore, since it is also possible to suppress the accommodated connecting portion and the end of the detection wire from the upper part (by narrowing the space) over a wide area of the wire lead-out groove by the flat plate-like protruding piece, it is possible to reduce the weight or material. It is possible to make the shape effective for preventing the lifting while reducing the cost.

  The protector may be configured by connecting a plurality of housing units in the direction in which the detection wires are routed. According to such a structure, since the connection number of an accommodation unit should just be changed according to the number of the single cells which comprise the single cell group which attaches the wiring module for batteries, it is excellent in versatility. Moreover, since the molding die can be reduced in size if it is divided into housing units instead of being molded as a protector, the mold cost can be reduced and the manufacturing cost can be reduced. it can. Furthermore, if the electric wire restricting portion is provided for each housing unit, it is possible to naturally restrict the floating of the detection electric wire at every predetermined interval and to restrict the floating of the detection electric wire over the entire protector.

  The protector may include a connecting member accommodating portion that accommodates a connecting member that connects adjacent electrode portions, and the wire lead-out groove may be in communication with the wire accommodating groove and the connecting member accommodating portion. According to such a configuration, the electric wire receiving groove is provided in parallel with the connecting member accommodating portion in the arrangement direction of the cells, and the electric wire leading out that communicates the electric wire accommodating groove and the connecting member accommodating portion. The extending direction of the groove intersects the electric wire housing groove and the connecting member housing portion. Therefore, since the detection electric wire accommodated in the wire is led out by bending the detection electric wire arranged in the electric wire accommodation groove at least in the electric wire outlet groove, a reaction force is generated to return to the direction of the electric wire accommodation groove. This makes it easier for the sensing wire to rise. It is particularly useful to apply the wire restricting portion of the present invention to such a configuration.

  The connection member accommodating portion includes a connection member side lid portion that is integrally provided via an integral hinge on an enclosing wall frame portion that surrounds the accommodated connection member, and covers the connection member. The lid portion and the connection member side When the lid portion is closed, a part of the connecting member side lid portion may be arranged so as to overlap the lid portion. According to such a configuration, since the lid portion provided with the wire regulating portion that regulates the floating of the detection wire can be partially covered by the connecting member side lid portion, the lid portion itself is prevented from being lifted. be able to. Further, by integrally forming the connection member-side cover portion with respect to the connection member housing portion, it is possible to improve the manufacturing efficiency by reducing the number of parts and shortening the manufacturing process, similarly to the cover portion.

  Further, the detection member connected to the connection member is accommodated in the connection member accommodating portion, and the detection terminal includes a main body portion and a connection portion connected to the detection electric wire, The electric wire restricting portion may include a connecting portion restricting portion disposed on the connecting portion, and the connecting member side cover portion may be disposed so as to overlap the connecting portion restricting portion of the lid portion. As described above, the connection portion and the terminal of the detection wire connected to the connection portion are easily lifted, and it is important to prevent the connection wire from being lifted by the connection portion restriction portion. . Therefore, the connection member side cover part is further superimposed on the connection part restriction part arranged on the connection part that is likely to be lifted, so that the cover part itself formed with the connection part restriction part is less likely to float, It is possible to prevent the connection portion from rising more strongly.

  ADVANTAGE OF THE INVENTION According to this invention, the wiring module for batteries provided with the cover part which can prevent the floating of a voltage detection line can be provided.

The top view of the battery module to which the wiring module for batteries concerning one embodiment of the present invention was attached. The top view of the battery module which shows the state which the 1st cover part and the 2nd cover part opened. Top view of the storage unit AA sectional view of FIG. BB sectional view of FIG.

<Embodiment>
An embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the battery wiring module 20 of the present embodiment is attached to a unit cell group in which a plurality of unit cells 11 are arranged to form a battery module 10. For example, it is used as a drive source for vehicles such as electric vehicles and hybrid vehicles. In the following description, the upper side of FIG. 1 is the front side, the lower side is the rear side, the left-right direction is the connection direction, the front side of the page is the upper side, and the back side of the page is the lower side.

(Battery module)
As shown in FIG. 1, the battery module 10 includes, for example, a plurality of unit cells 11 (corresponding to a unit cell group) arranged side by side and a battery wiring module 20 attached to the plurality of unit cells 11. It is prepared for.

(Single cell)
The unit cell 11 has a pair of electrode terminals 12 and 13 projecting from both front and rear ends of a predetermined surface (upper surface) of a rectangular parallelepiped main body in which a power generation element (not shown) is accommodated. One of the electrode terminals 12 and 13 is a positive terminal, and the other is a negative terminal. Screw threads are formed on the peripheral surfaces of the electrode terminals 12 and 13. The unit cells 11 are arranged side by side so that the front and rear direction of the adjacent unit cells 11 are opposite to each other, whereby the polarities of the adjacent electrode terminals 12 and 13 are different (the positive electrode and the negative electrode are arranged side by side). (Alternately). The plurality of unit cells 11 are fixed by a holding plate (not shown) so as to constitute a unit cell group in a side-by-side state.

(Battery wiring module)
Two sets of battery wiring modules are attached along two groups of electrode terminals 12 and 13 arranged side by side at the front and rear ends (upper and lower ends in FIGS. 1 and 2) of the cell group. In the figure, only the front side of the two sets is shown.

  As shown in FIG. 2, the battery wiring module 20 includes a plurality of bus bars 21 (corresponding to connecting members) that connect between electrode terminals 12 and 13 that are adjacent to each other in a left and right within a protector 30 made of synthetic resin. A plurality of voltage detection terminals 25 (corresponding to detection terminals) for detecting the voltage of the unit cells 11 stacked on the bus bar 21 are accommodated.

(Bus bar)
The bus bar 21 is made of metal such as copper, copper alloy, stainless steel (SUS), and aluminum, and has a length corresponding to the dimension between the electrode terminals 12 and 13 of the adjacent unit cells 11 as shown in FIGS. A pair of through-holes 22 is formed, through which the electrode terminals 12 and 13 can be inserted. The shape of the through hole 22 is an oval shape whose longitudinal direction is the connection direction, and can absorb a dimensional error between the electrode terminals 12 and 13 due to a dimensional tolerance or an assembly tolerance of each unit cell 11. It has become.

(Voltage detection terminal)
The voltage detection terminal 25 superimposed on the bus bar 21 includes a rectangular flat plate portion 26 (corresponding to the main body portion) and a crimping portion 27 (corresponding to the connection portion) provided so as to protrude from the flat plate portion 26. A detection electric wire 23 for detecting the voltage of each cell 11 is crimped to the crimp portion 27. An insertion hole 28 that penetrates one of the through holes 22 of the bus bar 21 and through which the corresponding one of the electrode terminals 12 (13) can be inserted is formed through the central portion of the flat plate portion 26.

  The detection electric wires 23 connected to the voltage detection terminals 25 are collected in an electric wire receiving groove 33 of the protector 30 described later and connected to a monitoring ECU (not shown) provided at a position on the right side of FIG. . The monitoring ECU is equipped with a microcomputer, an element, and the like, and has a function for detecting the voltage, current, temperature, etc. of the unit cells 11 and performing monitoring control of each unit cell 11 and the like. The structure is made.

(Protector)
As shown in FIGS. 1 and 2, the protector 30 includes a plurality of (five in the present embodiment) accommodation units 31 connected in the left-right direction. The arrangement direction of the accommodation units 31 matches the arrangement direction of the detection wires 23, and further matches the arrangement direction of the cells 11 in this embodiment.

(Containment unit)
The housing unit 31 is made of synthetic resin, and, as shown in FIG. 3, a bus bar housing portion 32 (corresponding to a connecting member housing portion) that houses the bus bar 21 and the voltage detection terminal 25 superimposed thereon, and a bus bar housing. An electric wire receiving groove 33 provided in parallel to the portion 32 and opened in the left-right direction, and an electric wire outlet groove 34 communicating with the bus bar receiving portion 32 and the electric wire receiving groove 33 are provided.

(Bus bar housing)
The bus bar accommodating portion 32 has a box shape that is long in the left-right direction (connection direction) so as to accommodate the bus bar 32, and includes a surrounding frame portion 32 </ b> A that surrounds three sides around the accommodated bus bar 32 (other than the left side in FIG. 3). 3 includes an open end 32B for insertion into which the bus bar 32 can be laterally inserted from the left side of FIG. 3, and a bottom plate 32C on which the accommodated bus bar 32 is placed. From the wall surface along the left-right direction in the surrounding wall frame portion 32A, a plurality of bus bar pressers 32D for restricting the vertical movement of the horizontally inserted bus bar 32 are provided protruding inward. Although not shown, the voltage detection terminal 25 accommodated in a state of being superimposed on the bus bar 32 is inserted from above the bus bar accommodating portion 32, and the convex shape protruding from the flat plate portion 26 has a surrounding frame portion 32A. It is prevented from coming off by being fitted into a recess formed in the wall surface.

(Wire lead-out groove)
The wire lead-out groove 34 has a concave shape extending in the front-rear direction, and communicates with the bus bar housing portion 32 through the rear wall surface 32E of the wall surface along the left-right direction of the surrounding wall frame portion 32A in the bus bar housing portion 32. Of the groove wall portions 33 </ b> A (to be described later) of the housing groove 33, the front groove wall portion 33 </ b> B is similarly penetrated to communicate with the wire housing groove 33. The wire lead-out groove 34 guides the crimp portion 27 of the voltage detection terminal 25 and the sense wire 23 crimped thereto from the bus bar housing portion 32 to the wire housing groove 33.

(Wire housing groove)
The electric wire accommodation groove 33 is configured to have a concave cross section by a pair of groove wall portions 33A extending in the left-right direction, and constitutes one groove communicating in the left-right direction by connecting the accommodation units 31 to each other. The electric wire receiving groove 33 bends each detection electric wire 23 led out from the electric wire outlet groove 34 of each accommodation unit 31 at a substantially right angle, whereby a plurality of detection electric wires 23 are formed along the extending direction of the electric wire accommodation groove 33. And is led out to the right side on the monitoring ECU side described above.

(First lid)
Now, as shown in FIGS. 3 to 5, the wire receiving groove 33 has a first lid portion via a rear hinge 35 protruding outward from the side surface of the rear groove wall portion 33C of the groove wall portion 33A. 40 (corresponding to the lid) is integrally provided. The first lid 40 is rotatable about the rear hinge 35 as an axis, and has a substantially rectangular main body 41 that can cover the entire wire receiving groove 33 from above when the lid is closed. As shown in FIG. 3, a pair of first lock pieces 42 protrudes from the back surface of the main body 41 (the surface that is the lower side when the lid is closed). A first lock receiving portion 36 corresponding to the first lock piece 42 is provided between the bus bar housing portion 32 and the wire housing groove 33 when the lid is closed. The first lock piece 42 can be bent and deformed in the front-rear direction. The first lock piece 42 is inserted into the first lock receiving portion 36 while being elastically deformed, and the claw portion is elastically restored, so that the first lock piece 42 is elastically restored. The lock piece 42 and the first lock receiving portion 36 are engaged. Thus, the first lid 40 is held in a closed state.

(Wire Control Department)
An electric wire restricting portion 43 is provided in the main body portion 41 at a position sandwiched between the pair of first lock pieces 42. The wire restricting portion 43 includes a wire restricting projection 44 disposed on the detection wire 23 led into the wire lead-out groove 36 when the lid is closed, and a connection portion restricting portion 45 disposed on the crimping portion 27. Is done. The wire regulating protrusion 44 has a convex shape protruding from the back surface of the main body 41, and the width dimension in the connecting direction is set slightly smaller than the groove width of the wire lead-out groove 34 and can enter the wire lead-out groove. It is made into the composition. As shown in FIG. 4, the wire restricting projection 44 is positioned immediately above the detection wire 23 extending rearward from the crimping portion 27 in the wire lead-out groove 34 when the lid is closed, and the protruding height in the vertical direction is closed. The spatial distance a from the bottom surface of the wire lead-out groove 34 at the time of the lid to the protruding end of the wire restriction projection 44 is set according to the diameter of the detection wire 23 so that the detection wire 23 can be led out.

  As shown in FIG. 4, the connecting portion restricting portion 45 extends downward after protruding downward from the end of the main body 41 opposite to the side connected to the rear hinge 35 and bending forward. It is comprised from the protruding piece made. Of the connecting part restricting part 45, the holding piece part 45 </ b> A arranged substantially in parallel with the crimping part 27 when the cover is closed has both ends in the width direction hanging downward so as to cover the upper part of the wire outlet groove 34. It has a different shape. The position in the vertical direction of the holding piece 45A is such that the spatial distance b from the bottom surface of the wire lead-out groove 34 when the lid is closed to the lower surface (back side) of the substantially central portion in the width direction of the holding piece 45A is the crimping of the voltage detection terminal 25. It is set according to the height dimension of the crimping part 27 so that the part 27 can be derived.

(Second lid)
On the other hand, as shown in FIGS. 3 to 5, the bus bar housing portion 32 has a second lid portion 50 (connection member) via a front hinge 37 protruding outward from the side surface of the front side wall surface 32F of the surrounding frame portion 32A. (Corresponding to a side lid) is provided integrally. The second lid part 50 is rotatable about the front hinge 37 as an axis, and has a substantially rectangular main body part 51 that can cover the entire bus bar housing part 32 when the lid is closed. As shown in FIG. 3, a pair of second lock pieces 52 project from the back surface of the main body 51 (the lower surface when the lid is closed).

  A second lock receiving portion 38 corresponding to the second lock piece 52 is provided between the bus bar receiving portion 32 and the wire receiving portion 33 and in front of the first lock receiving portion 36 when the lid is closed. . Similar to the first lock piece 42, the second lock piece 52 is a cantilevered engagement piece, and is held in a closed state by engaging the second lock receiving portion 38. can do. The second lid portion 50 is provided with a superimposing portion 53 that is superposed on the connection portion regulating portion 45 when the lid is closed, and the second lid portion 50 is provided on the connection portion regulating portion 45 of the first lid portion 40. The double-spread type lids 40 and 50 can be closed with the overlapping portion 53 of the lid 50 overlapping. By closing these lid portions 40 and 50, all of the bus bar 21, the voltage detection terminal 25, and the detection electric wire 23 accommodated in the accommodation unit 31 can be covered.

  Next, a configuration for connecting the accommodation units 31 to each other will be described. On the left side of the first lock receiving portion 36 and the second lock receiving portion 38 (that is, the left end portion of the intermediate portion between the bus bar receiving portion 32 and the wire receiving groove 33), the main body coupling engaging claw protruding in the connecting direction. 39A is provided. On the right side (that is, the right end portion of the intermediate portion between the bus bar housing portion 32 and the wire housing groove 33), the body coupling engagement member capable of engaging the body coupling engagement claw 39A of the housing unit 31 on the other side. A concavity 39B is provided.

  Now, from the upper left end of the second lid portion 50 in FIG. 3, a lid portion coupling engagement claw 54A having the same shape as the main body coupling engagement claw 39A is projected. The right end portion is provided with a lid connecting engagement hole 54B capable of engaging with the engaging claw 54A for connecting the lid of the housing unit 31 on the counterpart side. Each of the main body coupling engaging claws 39A and the lid portion coupling engaging claws 54A is composed of a pair of elastic pieces, and is configured to be able to bend and deform in a direction approaching each other. On the other hand, the main body coupling engaged recess 39B has a concave shape that allows the main body coupling engaging claw 39A to be inserted while being bent and deformed, and to be elastically restored to engage the engaging claw 39A. Further, the lid connecting engagement hole 54B has a ring shape penetrating in the connecting direction. The lid coupling engagement claw 54A is inserted into the lid coupling engagement hole 54B while being bent and deformed, and is elastically restored so that the engagement claw 54A is caught in the hole edge on the side opposite to the insertion side and pulled out. Can be held impossible.

Next, an example of a method for assembling the battery wiring module 20 will be described.
First, the bus bar 21 is laterally inserted into the bus bar accommodating portion 32 from the open end 32B for insertion. Then, the voltage detection terminal 25 is fitted onto the bus bar 21 housed from above the bus bar housing portion 32, and the detection wire 23 crimped to the voltage detection terminal 25 is led out from the wire lead-out groove 34 to the wire housing groove 33. To do. Before and after this, the accommodation units 31 are connected to each other. As shown in FIG. 2, with the first lid portion 40 and the second lid portion 50 opened, the adjacent main body coupling engagement claws 39A are similarly adjacent to the main body coupling engagement concave portions 39B. The engaging claw 54A for connection is engaged with the engaged recessed portion 54B for lid connection. By repeating this, the accommodation units 31 corresponding to the number of the unit cells 11 to be mounted are connected, and the assembly of the battery wiring module 20 is completed.

Next, a method for assembling the battery wiring module 20 to the cell group will be described.
The electrode terminals 12 and 13 of the cell 11 corresponding to the through holes 22 of the bus bars 21 and the insertion holes 28 of the voltage detection terminals 25 communicating therewith are inserted. A nut (not shown) is screwed onto the electrode terminals 12 and 13 inserted through the through hole 22 or the through hole and the insertion hole 28 and tightened. Thereby, the electrode terminals 12 and 13 and the voltage detection terminal 25 projecting into the same bus bar accommodating portion 32 through the bus bar 21 are electrically connected.

  After the assembly of the battery wiring module 20 to the single battery group is completed, the first lid 40 is first closed. In addition, since the 1st cover part 40 which the adjacent 1st cover parts 40 are not connected, it is possible to perform opening / closing operation | movement independently for every storage unit 31. FIG. When the first lid 40 is closed, when the detection wire 23 accommodated in the wire lead-out groove 34 is floating, the wire regulation protrusion 44 first comes into contact with the detection wire 23 and the detection wire 23 is led out. Push into the groove 34. Further, when the crimping portion 27 is lifted, the first locking piece 42 is engaged with the first lock receiving portion 36 while the holding piece portion 45A of the connection portion regulating portion 45 regulates the lifting, The operation of closing the first lid 40 is completed. At this time, the first lid portion 40 is closed while the crimping portion 27 that is the basis of the detection wire 23 and the terminal portion of the detection wire 23 that is connected to the detection wire 23 being suppressed into the wire lead-out groove 34 by the wire restriction portion 43, and thus the detection wire 23. Can be reduced between the first lid portion 40 and the electric wire receiving groove 33 and the electric wire outlet groove 34.

  Further, when the lid is closed, the spatial distance a from the bottom surface of the wire lead-out groove 34 to the protruding end of the wire restriction projection 44 and the bottom surface (back surface) of the center portion in the width direction of the holding piece 45A from the bottom surface of the wire lead-out groove 34. ) Is secured, there is no possibility that the wire regulating portion 43 contacts and presses against the crimping portion 27 and the detection wire 23 accommodated in the wire lead-out groove 34, and the crimping portion 27 and the detection wire. Problems caused by applying an extra external force to 23 are prevented in advance.

  Subsequently, the second lid 50 is closed. Since the adjacent second lid portions 50 are connected to each other, the second lid portion 50 can collectively perform opening / closing operations of the plurality of second lid portions 50. By engaging the second lock piece 52 with the second lock receiving portion 38, the operation of closing the second lid portion 50 is completed. At this time, at least the overlapping portion 53 of the second lid portion 50 is arranged so as to overlap the holding piece portion 45A of the first lid portion 40, and the first lock piece 42 and the first lock receiving portion 36 are engaged. It becomes possible to hold | maintain the closed 1st cover part 40 in the state closed more firmly. As described above, the assembly of the battery module 10 is completed.

  As described above, according to the present embodiment, by closing the first lid portion 40, the plurality of detection wires 23 housed in the wire lead-out grooves 34 are prevented from floating, and the movement of the detection wires 23 itself. Can be regulated. As a result, even when the present invention is applied to the battery module 10 mounted on a vehicle such as an automobile that is susceptible to vibrations, the detection electric wires 23 move around due to the vibrations, and the detection electric wires 23 may be damaged. In addition, it is possible to prevent problems such as stress concentrating on the crimping portion 27 connected to the detection wire 23 and reducing connection reliability.

  Moreover, the workability | operativity at the time of accommodating the detection electric wire 23 in the electric wire extraction groove | channel 34 can be improved by protrudingly providing the electric wire control part 43 in the main body part 41 back surface side of the 1st cover part 40. FIG. That is, in the case where the wire lead-out groove itself is provided with a wire restraint that prevents the detection wire from being lifted (for example, when a slit is provided in the upper part of the wire housing groove and the slit is inserted to accommodate the detection wire) The workability was poor, such as the need to push the detection wire into the lead-out groove. On the other hand, since this embodiment can hold down the detection electric wire 23 to the bottom side of the electric wire outlet groove 34 at the same time as the operation of closing the first lid portion 40, the operation of housing is made easier. Can do.

  Moreover, since the electric wire control part 43 is provided with the convex electric wire control protrusion 44 arrange | positioned on the detection electric wire 23 when the 1st cover part 40 is closed, electric wire control is performed, closing the 1st cover part 40. Since the detection wire 23 can be pushed into the wire lead-out groove 34 by the protrusion 44, the detection wire 23 is not sandwiched between the first lid portion 40 and the wire lead-out groove 34, and the detection wire 23 is accommodated. It can be prevented from being damaged.

  Further, by restricting the lifting of the crimping portion 27 by the connecting portion restricting portion 45, it is possible to effectively suppress problems such as a decrease in connection reliability. That is, since the detection electric wire 23 and the voltage detection terminal 25 are made of different materials, that is, have different physical properties, stress is likely to concentrate on the crimping portion 27 when vibration is applied from the outside. Therefore, by restricting the movement of the crimping portion 27 accommodated in the wire lead-out groove 34 by the connecting portion restricting portion 45, it is possible to suppress problems such as a decrease in connection reliability.

  Moreover, if the detection electric wire 23 crimped | bonded to the crimping | compression-bonding part 27 and the crimping | compression-bonding part 27 is based on the detection electric wire 23 accommodated along the electric wire accommodation groove | channel 33, electric wire derivation | lead-out will be carried out by bending these detection electric wires 23. It is accommodated in the groove 34. Accordingly, a reaction force is generated at the crimping portion 27 and the end of the detection electric wire 23 to return to the side of the electric wire accommodation groove 33 in which most of the detection electric wire 23 is accommodated. Due to this reaction force, the end of the detection wire 23 and the crimping portion 27 are particularly likely to be lifted. Therefore, by restricting the lifting with the connection portion restricting portion 45, the lifting of the entire detection wire 23 is effectively suppressed. be able to.

  Moreover, since the 1st cover part 40 is integrally formed with respect to the electric wire accommodation groove | channel 33, the improvement of manufacturing efficiency by reduction of a number of parts and shortening of a manufacturing process can be anticipated. Further, the connecting portion regulating portion 45 is a protruding piece extending from the end edge of the main body portion 41 of the first lid portion 40, so that the entire first lid portion 40 extends in the forward direction in accordance with the wire lead-out groove 34. This eliminates the need for installation and can reduce manufacturing costs. Moreover, by reducing the connecting portion restricting portion 45 to a protruding piece such as the piece 45A, the amount of material necessary to form the connecting portion restricting portion 45 is reduced rather than making a lump like a convex portion. be able to. Furthermore, it is also possible to hold down the accommodated crimping portion 27 and the end of the detection wire 23 from above (by narrowing the space) over a wide area of the wire lead-out groove 34 by the flat holding piece 45A. Thus, it is possible to obtain an effective shape for preventing lifting while reducing the weight or reducing the material cost.

  The protector 30 is configured by connecting a plurality of accommodation units 31 in the direction in which the detection wires 23 are arranged, and is accommodated according to the number of the cells 11 constituting the cell group to which the battery wiring module 20 is attached. Since the number of units 31 to be connected may be changed, the versatility is excellent. Moreover, since the molding die which forms the accommodating unit 31 can be reduced in size, the mold cost can be reduced and the manufacturing cost can be reduced. Furthermore, if the electric wire restriction part 43 is provided for each housing unit 31, the floating of the detection electric wire 23 can be restricted by a predetermined interval, and the floating of the detection electric wire 23 can be restricted over the entire protector 30.

  Further, the electric wire receiving groove 33 is provided in parallel with the bus bar accommodating portion 32 in the direction in which the cells 11 are arranged, and the electric wire outlet groove 34 communicating the electric wire accommodating groove 33 and the bus bar accommodating portion 32 is provided. The extending direction intersects the electric wire accommodation groove 33 and the bus bar accommodation portion 32. Therefore, since the detection electric wire 23 accommodated therein is led out by bending the detection electric wire 23 routed in the electric wire accommodation groove 33 at least in the electric wire outlet groove 34, the detection electric wire 23 tends to return toward the electric wire accommodation groove 33. Reaction force is generated, and the detection electric wire 23 is easily lifted. It is particularly useful to apply the wire restricting portion 43 to such a configuration.

  In addition, the overlapping portion 53 of the second lid portion 50 is further superimposed on the connecting portion restricting portion 45 disposed on the pressure-bonding portion 27 that is easily lifted, so that the connecting portion restricting portion 45 is formed. 1 lid 40 itself becomes difficult to lift, and it can prevent the press-fit part 27 from rising more strongly. Further, by integrally forming the second lid portion 50 with respect to the bus bar accommodating portion 32, as with the first lid portion 40, it is possible to improve the manufacturing efficiency by reducing the number of parts and shortening the manufacturing process.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the above-described embodiment, the battery wiring module 20 that can accommodate the bus bar 21 that connects the adjacent electrode terminals 12 and 13 is illustrated. However, the present invention is not limited thereto, and only the detection wire is accommodated. In addition, the present invention can be applied to a battery wiring module that accommodates electric wires for various uses that are routed around the battery. Moreover, the detection electric wire does not necessarily need to be a voltage detection line, What is necessary is just an electric wire for detecting the state of each battery, such as an electric current detection line, and sending a detection signal to ECU etc.

  (2) In the above-described embodiment, both the connecting portion restricting portion 45 that restricts the lifting of the crimping portion 27 and the wire restricting protrusion 44 that restricts the rising of the detection wire 23 connected thereto are provided. What provided one side shall also be included in this invention.

  (3) In the above-described embodiment, the wire regulating portion 43 is provided at a position that enters the wire lead-out groove 34 when the lid is closed, but is not limited to this, for example, at a position that enters the wire housing groove 33 when the lid is closed. It may be provided.

  (4) In the above-described embodiment, the first lid portion 40 that mainly covers the electric wire housing groove 33 and the second lid portion 50 that covers the bus bar housing portion 32 are provided. It is sufficient if one lid 40 is provided. Moreover, although each cover part was connected by the integral hinge, it is not restricted to this, The structure connected by another hinge may be sufficient.

  (5) In the above-described embodiment, the electrode terminals 12 and 13 of the unit cell 11 are configured to have a rod-shaped shaft portion having a thread formed on the peripheral surface thereof. The nut may be configured to be fastened using a bolt of another member.

  (6) In the above-described embodiment, the case where the plurality of single cells 11 are connected in series has been described.

  (7) About the number of the cell 11 which comprises the battery module 10, it is not restricted to the number of the said embodiment. Further, the shape of the battery wiring module 20 can be arbitrarily set according to the number of the cells 11.

  (8) In the above-described embodiment, the bus bar 21 is exemplified as the connection member. However, the bus bar 21 is not limited thereto, and any member that can be electrically connected may be used. For example, an electric wire, a flexible printed circuit board (FPC), or the like is used. Also good.

DESCRIPTION OF SYMBOLS 10 ... Battery module 11 ... Single cell 12, 13 ... Electrode terminal (electrode part)
20 ... Battery wiring module 21 ... Bus bar (connection member)
23 ... Detection wire 25 ... Voltage detection terminal (detection terminal)
26 ... Flat plate (main body)
27 ... Crimping part (connection part)
30 ... Protector 31 ... Accommodating unit 32 ... Bus bar accommodating part (connecting member accommodating part)
32A ... Enclosure frame portion 33 ... Electric wire receiving groove 33A ... Groove wall portion 34 ... Electric wire outlet groove 35 ... Rear hinge (integrated hinge)
37 ... Front hinge (integrated hinge)
40 ... 1st cover part (lid part)
43 ... Electric wire restriction part 44 ... Electric wire restriction protrusion 45 ... Connection part restriction part 45A ... Holding piece part 50 ... Second cover part (connection member side cover part)
53. Superimposition part

Claims (8)

A battery wiring module attached to a unit cell group in which a plurality of unit cells having positive and negative electrode portions are arranged,
A plurality of sensing wires for detecting the state of the unit cell group at the terminal;
A protector having a wire receiving groove for storing the detection wire group, and
The protector includes a wire lead-out groove that guides the detection wire in the wire housing groove to the unit cell group side, a lid portion that covers the wire housing groove and the wire lead-out groove, and a back surface side of the lid portion. A battery wiring module comprising: an electric wire restricting portion that protrudes and restricts the floating of the detection electric wire by narrowing a space in the electric wire receiving groove or the electric wire outlet groove when the lid portion is closed.   2. The battery wiring module according to claim 1, wherein the electric wire restricting portion includes a protruding electric wire restricting protrusion disposed on the detection electric wire when the lid portion is closed. The protector contains a detection terminal connected to the end of the detection wire,
The detection terminal includes a main body portion and a connection portion connected to a terminal of the detection electric wire,
The said electric wire control part is equipped with the connection part control part arrange | positioned on the said connection part accommodated in the said electric wire extraction groove | channel when the said cover part is closed, The Claim 1 or Claim 2 characterized by the above-mentioned. Battery wiring module. The wire receiving groove has a pair of groove wall portions that rise along the wiring direction of the detection wire,
The lid portion is provided integrally with the groove wall portion via an integral hinge,
4. The battery wiring module according to claim 3, wherein the connection portion restricting portion includes a protruding piece extending from an end of the lid portion on the side opposite to the integral hinge.   5. The battery wiring module according to claim 1, wherein the protector is configured by connecting a plurality of housing units in a wiring direction of the detection wires. 6. The protector includes a connecting member accommodating portion that accommodates a connecting member that connects between the adjacent electrode portions,
The battery wiring module according to any one of claims 1 to 5, wherein the wire lead-out groove communicates with the wire housing groove and the connection member housing portion. The connecting member accommodating portion includes a connecting member side lid portion that is integrally provided on an enclosing wall frame portion surrounding the accommodated connecting member via an integral hinge and covers the connecting member.
7. The battery according to claim 6, wherein when the lid and the connection member side lid are closed, a part of the connection member side lid is superimposed on the lid. Wiring module. In the connection member accommodating portion, the detection terminal connected to the connection member is accommodated,
The detection terminal includes a main body portion and a connection portion connected to the detection electric wire,
The wire restriction part includes a connection part restriction part disposed on the connection part,
8. The battery wiring module according to claim 7, wherein the connection member-side cover portion is disposed so as to overlap the connection portion regulating portion of the cover portion. 9.

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