JP2015118731A - Wire material, secondary battery device, electronic apparatus, and producing method of wire material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire material, a secondary battery device, an electronic apparatus, and a producing method of wire material capable of suppressing increment in thickness of the wire material and transmitting signal and electric power.SOLUTION: Wire material 1 comprises: one or more first conductor 2 having a predetermined thickness and a width larger than the predetermined thickness in its sectional shape; one or more second conductor 3 which has a predetermined thickness and a width larger than the width of the first conductor 2 and being arranged with a gap between itself and the first conductor 2; and a cover member 4 covering the first and second conductors 2, 3 in a manner where both end parts 20a of the first conductor 2 and both end parts 30a, 30b of the second conductor 3 are exposed. At least one of the first and second conductors are bent so that the first conductor does not electrically contacts with the second conductor.

Description

  The present invention relates to a wiring material such as a flexible printed circuit (FPC), a secondary battery device, an electronic device, and a method for manufacturing the wiring material.

  Lithium ion secondary battery modules mounted on electric vehicles and hybrid vehicles have a plurality of lithium ion secondary battery cells inside, and the electrode terminals of adjacent battery cells are connected by a connecting member such as a bus bar. It has a structure. If the battery cell is excessively charged, there is a risk of heat generation. If the battery cell is excessively discharged, the charge and discharge functions are degraded due to the dissolution of the electrode material, so that voltage control with extremely high accuracy of about several tens of mV is required. . Therefore, each bus bar connected to each battery cell is connected to the control circuit and the protection circuit via the voltage monitoring wiring material.

  The wiring material for voltage monitoring has a length of about 0.5 to 1 m due to the size of the lithium ion secondary battery module. Further, this wiring material has a plurality of conductors because the wiring distance from the circuit board to each bus bar is different, and forms an arbitrary wiring pattern in which the conductors branch from the bundle of the plurality of conductors.

  Moreover, since the number of wiring materials increases with the increase in the number of battery cells due to the demand for large capacity and miniaturization of the lithium ion secondary battery module, there is a demand for reducing the area occupied by the wiring materials. Further, since this wiring material is required to have an arbitrary pattern of wiring, a flexible printed circuit (FPC) or the like is used. By using a thin wiring material such as FPC, the area occupied by the wiring material can be reduced, and by forming the pattern shape in advance so as to match the position of each bus bar, errors in assembling the lithium ion battery module can be achieved. The work of preventing wiring and positioning the wiring material and bus bar for connection are simplified.

  Furthermore, in order to reduce the area occupied by the wiring material, a signal for monitoring the voltage at each bus bar is transmitted to the wiring material, and power is supplied from the lithium ion secondary battery module to an electric motor such as an electric vehicle. There is a need to transmit.

  Further, for example, in an apparatus such as a digital multi-function peripheral in which a copy, a scanner, and the like are integrated, in addition to wiring in the apparatus, wiring between an operation unit such as a scanner reading mechanism and a control circuit is necessary. In such wiring, when the device is particularly compatible with A0 size (84.1 cm × 118.9 cm), the wiring length may exceed 1 m. In addition, the wiring between the scanner head, the inkjet head, and the like and the fixed side control board for controlling these is made up of a long straight portion for allowing a movable range and a branch portion branching to a predetermined connecting portion. Composed. For this reason, as such a wiring material for a digital multi-function peripheral, an FPC or the like capable of wiring in an arbitrary pattern is used in the same manner as the wiring material described above.

  An FPC, which is an example of a wiring material, is manufactured by a process of forming a wiring pattern by photolithography on a film base material obtained by bonding a copper foil to a polyimide film as a covering member, and removing unnecessary portions of copper by an etching process. .

  Since FPC forms a conductor pattern by etching a copper foil, a waste of copper material is increased. Further, materials (photoresist, developer, cleaning solution, etc.) used for processes other than the etching process are required. In particular, in the case of wiring materials for voltage monitoring, the more the wiring pattern is complex and not as dense as an electronic circuit, and the simple structure in which long conductors are branched, the more material is wasted. , The cost of manufacturing the FPC increases.

  In addition, the conventional wiring material mainly forms a circuit of several tens of centimeters square, but the voltage monitoring wiring material has a length of about 1 m and cannot be handled by an existing photolithography apparatus. . For this reason, it is necessary to increase the size of the photolithography apparatus, which further increases the cost of manufacturing the wiring material. Moreover, since FPC uses copper foil, the thickness of a conductor is very thin, and when it becomes large as mentioned above, conductor resistance increases.

  The flat harness (wiring material) described in Patent Document 1 is a copper wire having a circular cross section laid in the same plane along a predetermined wiring pattern and covered with an insulating film from both sides. Manufactured without including.

  The flat harness described in Patent Document 2 includes a ribbon cable as a first flat cable, and an FPC as a second flat cable connected to an intermediate position of the first flat cable via a connecting portion. A part of the conductor of the first flat cable and a part of the conductor of the second flat cable are electrically connected. According to this configuration, a flat harness that does not have a large FPC can be obtained by using the FPC only for the second flat cable.

JP 2002-157924 A JP 2002-203431 A

  However, according to the wiring material described in Patent Document 1, since a conductor having a circular cross section is used, the conductor resistance of the wiring material increases because the diameter of the conductor is reduced when the wiring material is further thinned. There's a problem. Further, it is possible to arrange a plurality of circular conductors in close contact with each other to suppress an increase in the conductor resistance of the wiring material, but the number of steps for laying the conductors increases. Furthermore, when electric power is transmitted by this wiring material, it is necessary to increase the diameter of the conductor, and there is a problem that the wiring material becomes thick.

  According to the wiring material described in Patent Document 2, since the ribbon cable cannot form a branch structure, the FPC is used in the branch portion. However, there is a problem in that the number of steps for connecting the ribbon cable and the FPC is increased. In addition, there is a problem that a connecting portion for connecting the ribbon cable and the FPC becomes thick.

  Therefore, an object of the present invention is to provide a wiring material, a secondary battery device, an electronic device, and a method for manufacturing the wiring material that can suppress an increase in the thickness of the wiring material and can transmit a signal and power. It is in.

In order to achieve the above object, one embodiment of the present invention provides the following wiring material, secondary battery device, electronic device, and wiring material manufacturing method.
[1] The cross-sectional shape has a predetermined thickness and one or a plurality of first conductors having a width equal to or greater than the predetermined thickness, a predetermined thickness and a width greater than the width of the first conductor, The first and second conductors are exposed such that one or more second conductors disposed with a gap between the first conductor and both ends of the first and second conductors are exposed. A wiring member provided with a covering member that covers the conductor, wherein at least one of the first and second conductors is bent and the first conductor and the second conductor are not in electrical contact with each other Wood.
[2] The wiring material according to [1], wherein the thickness of the first and second conductors is in a range of 0.3 mm to 0.5 mm.
[3] The wiring member according to [1] or [2], wherein a cross-sectional area of the second conductor is in a range of 2.5 mm ^{2 to} 9 mm ² .
[4] The wiring member according to any one of [1] to [3], wherein a cross-sectional shape of the first and second conductors is a rectangle.
[5] The gap between the adjacent first conductors, the gap between the adjacent second conductors, or the gap between the first and second conductors so as to enter the gap. The wiring member according to any one of [1] to [4], further including a third conductor arranged in the manner described above.
[6] A secondary battery device comprising the wiring material according to any one of [1] to [5].
[7] An electronic device comprising the wiring material according to any one of [1] to [5].
[8] A step of supplying a first conductor having a predetermined thickness and a width equal to or greater than the predetermined thickness, and a second conductor having a predetermined thickness and a width larger than the width of the first conductor. Bending at least one of the first and second conductors and arranging the first conductor and the second conductor so as not to be in electrical contact with each other; And a step of covering the first and second conductors so that both ends of the first and second conductors are exposed.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the increase in the thickness of a wiring material, the wiring material which can transmit a signal and electric power, a secondary battery apparatus, an electronic device, and the manufacturing method of a wiring material can be provided.

FIG. 1 is a perspective view showing an appearance of a wiring material according to the first embodiment of the present invention. FIG. 2 is a plan view showing the secondary battery device on which the wiring material is mounted. FIG. 3 is a perspective view schematically showing a process of drawing the first and second conductors from the reel. FIG. 4 is a perspective view schematically showing a process of bending the first and second conductors. FIG. 5 is a perspective view schematically showing a state in which the first and second conductors are bent. FIG. 6 is a perspective view schematically showing a process of covering the first and second conductors with a covering member. FIG. 7 is a perspective view schematically showing a process of removing the removed portion of the covering member. FIG. 8 shows an outline of the bending apparatus, (a) is a perspective view of a fixed member, (b) is a perspective view of a movable member, and (c) is a perspective view showing a state in which the fixed member and the movable member are combined. FIG. 9A and 9B show the operation of the bending apparatus, in which FIG. 9A is a cross-sectional view showing a state before the conductor is bent, and FIG. 9B is a cross-sectional view showing a state after the conductor is bent. FIG. 10 is a perspective view showing the appearance of the wiring material according to the second embodiment of the present invention. FIG. 11 is a perspective view schematically showing a process of covering the first and second conductors with the second covering member. FIG. 12 is a plan view showing a secondary battery device on which the wiring material according to the third embodiment of the present invention is mounted. 13 is a cross-sectional view taken along line AA in FIG. FIG. 14 is a schematic diagram showing a method for manufacturing a wiring material, wherein (a) and (b) show a first member and a second member, respectively. FIG. 15 is a schematic diagram showing a method for manufacturing a wiring material, and shows a state in which a first member and a second member are overlapped. FIG. 16 is a plan view showing a modification of the present invention. FIGS. 16A and 16B show Modification 1 and Modification 2, respectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure, about the component which has the substantially same function, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.

[Summary of embodiment]
The wiring member has a cross-sectional shape having a predetermined thickness and one or more first conductors having a width equal to or greater than the predetermined thickness, a predetermined thickness and a width greater than the width of the first conductor, The first and second conductors are exposed such that one or more second conductors disposed with a gap between the first conductor and both ends of the first and second conductors are exposed. A covering member that covers the first conductor and at least one of the first and second conductors is bent so that the first conductor and the second conductor are not in electrical contact with each other. .

[First Embodiment]
FIG. 1 is a perspective view showing an appearance of a wiring material according to the first embodiment of the present invention. The wiring member 1 includes a plurality of (seven in this embodiment) first conductors 2 having a predetermined thickness and a width larger than the predetermined thickness, and a predetermined thickness and a width larger than the first conductor 2. A plurality of (two in the present embodiment) second conductors 3 having a width and arranged with a gap between the first conductors 2 and the first and second conductors 2, 3 And a covering member 4 that covers the first and second conductors 2 and 3 so as to expose both ends thereof.

(First and second conductors)
The first conductor 2 is bent at the first trunk portion 21 extending in the length direction of the wiring member 1 and the end portion (first bent portion 23) of the first trunk portion 21, and the width direction of the wiring member 1 The plurality of first conductors 2 are arranged in parallel with a gap between adjacent conductors. The second conductor 3 is bent at the second trunk portion 31 parallel to the first trunk portion 21 and the end portion (second bent portion 33) of the second trunk portion 31 in the width direction of the wiring member 1. The plurality of second conductors 3 are arranged in parallel with a gap between adjacent conductors. The first and second conductors 2 and 3 are arranged so as not to be in electrical contact with each other. Note that the first trunk portion 21 and the second trunk portion 31 may not be arranged in parallel.

  The first trunk portion 21 is composed of a portion from one end 20 a of the first conductor 2 to the first bent portion 23, and the first branch portion 22 is formed from the first bent portion 23 to the first bent portion 23. The conductor 2 is constituted by a portion up to the other end 20b. The second trunk portion 31 is configured by a portion from one end 30 a of the second conductor 3 to the second bent portion 33, and the second branch portion 32 is formed from the second bent portion 33 to the second bent portion 33. The conductor 2 is constituted by a portion up to the other end 30b.

  The first conductor 2 is bent at the first bending portion 23 in the direction of the width of the wiring member 1, that is, in the direction of an angle of 90 degrees with respect to the center line 1a. The second conductor 3 is bent in the direction of 90 degrees with respect to the center line 1 a by the second bent portion 33. The angle at which the first or second conductors 2 and 3 are bent in the first and second bent portions 23 and 33 is not limited to 90 degrees, and for example, 45 degrees or 135 degrees with respect to the center line 1a. Any angle may be used.

The first conductor 2 is preferably in a range of cross-sectional area of 0.5 mm ² or more 1.5 mm ² or less for use as a signal transmission. The second conductor 3 is a cross-sectional area by a 2.5 mm ² or more 9 mm ² or less in the range, it is possible to cope with a large current. For example, when the cross-sectional area is 9 mm ² , the second conductor 3 can supply a current of about 50 A to the current load. Note that the cross-sectional area of the second conductor 3 corresponds to the cross-sectional area of a circular conductor whose diameter is in the range of 1.8 mm to 3.4 mm.

  Since the first and second conductors 2 and 3 have a thickness of 0.3 mm or more, it is possible to suppress the width for making the above-mentioned cross-sectional area range. I do not disturb. On the other hand, the thickness of the wiring material 1 can be suppressed by setting the thickness of the first and second conductors to 0.5 mm or less. Thus, when the first conductor and the second conductors 2 and 3 are small in thickness, an increase in conductor resistance can be suppressed by increasing the width.

  For example, when the thickness is 0.3 mm, the first conductor 2 has a maximum width of 5 mm and a thickness of 0.5 mm. The width is preferably 1 mm. The second conductor 3 has a width of 30 mm at the maximum when the thickness is 0.3 mm so that the cross-sectional area is within the above range, and the width is 0.5 mm when the thickness is 0.5 mm. A minimum of 5 mm is preferred.

From the above, the thickness of the first conductor 2 is in the range of 0.3 mm to 0.5 mm, the width is in the range of 1 mm to 5 mm, and the cross-sectional area is in the range of 0.5 mm ^{2 to} 1.5 mm ^2. The thickness of the second conductor 3 is in the range of 0.3 mm to 0.5 mm, the width is in the range of 5 mm to 30 mm, and the cross-sectional area is in the range of 2.5 mm ^{2 to} 9 mm ^2. In addition to suppressing an increase in the thickness of the wiring material 1, signals and power can be transmitted without any problem by the wiring material 1.

  Here, for example, when considering the case where the first conductor 2 is made of copper and the cross-sectional shape is a rectangle having a thickness of 0.3 mm and a width of 1 mm, the conventionally used FPC copper foil has a thickness of Since it is about 35 μm, if the width is the same as that of the first conductor 2, the conductor resistance is very large as compared with the first conductor 2. If a conductor resistance equivalent to that of the first conductor 2 of the present invention is to be realized by the wiring material using copper foil as the conductor, the width of the copper foil is about 8.6 mm in order to increase the cross-sectional area of the conductor. There is a problem that the width of the conductor becomes very large.

  Thus, according to this Embodiment, conductor resistance can be made small compared with the conductor using copper foil by making the cross-sectional shape of the 1st and 2nd conductors 2 and 3 into a rectangle. Further, in the case of a conductor having the same thickness as that of a circular conductor, the cross-sectional area can be increased in the rectangular shape, so that the conductor resistance of the first and second conductors 2 and 3 can be reduced. . The first and second conductors 2 and 3 may have a square cross-sectional shape or a cross-sectional shape in which a side surface, an upper surface, or a lower surface is arcuate.

  For example, oxygen-free copper, tough pitch copper, copper alloy, aluminum, or nickel is used as the material for the first and second conductors 2 and 3. The surfaces of the first and second conductors 2 and 3 may be subjected to nickel plating, tin plating, or the like. In addition, the first and second conductors 2 and 3 are formed by rolling a round wire to make the cross-sectional shape rectangular, or by drawing a round wire using a rectangular die and making the cross-sectional shape rectangular. Etc. may be used.

(Coating member)
The covering member 4 includes a pair of covering members 4A and 4B, and a pair of covering members 4A and 4B sandwiching the plurality of first and second conductors 2 and 3, and both end portions 20a and 20b of the first conductor 2 and The first and second conductors 2 and 3 are covered so that both end portions 30a and 30b of the second conductor 3 are exposed. The covering member 4 is bonded to the first and second conductors 2 and 3 with an adhesive (not shown) applied to the opposing surfaces. The covering member 4 may be bonded to the first and second conductors 2 and 3 by a method such as fusion.

  For the covering member 4, for example, general polyimide, polyamide, polyethylene terephthalate or the like is used as an insulating member. As the adhesive, for example, an epoxy adhesive or a polyester adhesive is used.

(Secondary battery device)
FIG. 2 is a diagram illustrating a secondary battery device on which a wiring material is mounted. The secondary battery device 10 includes a plurality (six in this embodiment) of battery cells 11 each having a positive electrode 11A and a negative electrode 11B, and a plurality of (this embodiment) connecting the plurality of battery cells 11. Then, the thermistor 13 for measuring the temperature of the five bus bars 12, the battery cell 11, the power output from the battery cell 11, the signal based on the voltage at the bus bar 12, and the signal based on the temperature measured by the thermistor 13 are input. The wiring board 1 which connects the control board 14, the battery cell 11, the thermistor 13, and the control board 14 is provided.

  The battery cell 11 is a secondary battery that can be charged and discharged, such as a lithium ion battery or a nickel metal hydride battery, and stores, for example, electric power to be supplied to an electric motor (not shown) as a driving source for running the vehicle. Each battery cell 11 is a rectangular parallelepiped having the same size and has a common function and capacity.

  The bus bar 12 is connected to the positive electrode 11A and the negative electrode 11B of the battery cell 11 by nuts and bolts (not shown). The bus bar 12 connects a plurality of battery cells 11 in series by connecting the positive electrode 11A of one battery cell 11 and the other negative electrode 11B. The bus bar 12 may be connected so as to connect a plurality of battery cells 11 in parallel.

  The thermistor 13 measures the temperature of the battery cell 11 and outputs a signal based on the measured temperature to the pair of first conductors 2. By monitoring the temperature measured by the thermistor 13 with the control board 14, it is possible to detect abnormality of the battery cell 11 due to temperature rise.

  Electric power output from the plurality of battery cells 11, a signal based on the temperature measured by the thermistor 13, and a signal based on the voltage value at each bus bar 12 are input to the control board 14 via the wiring member 1. The control board 14 controls the electric power input from the plurality of battery cells 11 and outputs the electric power to a motor or the like (not shown), and the charging and discharging of each battery cell 11 according to the temperature measured by the thermistor 13 and the voltage value at each bus bar 12. Control etc.

  The pair of first conductors 2 in the wiring member 1 is connected to the thermistor 13, and the other first conductor 2 is connected to the positive electrode 11 </ b> A or the negative electrode 11 </ b> B of the battery cell 11. In addition, one second conductor 3 in the wiring member 1 is connected to a positive electrode 11A which is one end of a plurality of battery cells 11 connected in series, and the other second conductor 3 is connected to a plurality of series connected in series. The battery cell 11 is connected to the negative electrode 11B which is the other end. The first or second conductor 2 or 3 is connected to the positive electrode 11A or the negative electrode 11B by, for example, resistance welding, ultrasonic welding, soldering, or the like.

  The wiring member 1 can be used for an electronic device such as a digital multi-function peripheral in which a copy, a scanner, etc. are integrated. In this case, the first conductor 2 is connected so as to transmit a signal between a movable part side control circuit such as a scanner head or an inkjet head and a control circuit that controls the entire electronic device. For example, the second conductor 3 is connected so as to transmit electric power from a power supply circuit or the like to a movable part side control circuit, an electric motor, or the like.

(Method for manufacturing wiring material)
Next, an example of a method for manufacturing the wiring material 1 will be described. The manufacturing method of the wiring member 1 includes a plurality of grooves 5a that house the first conductor 2 having a predetermined thickness and a width larger than the predetermined thickness, and a second width that is larger than the first conductor 2. A reel 5 having a plurality of grooves 5b for accommodating the conductor 3 and supplying the first and second conductors 2 and 3 from the reel 5, and the supplied first and second conductors 2 3 and a step of preparing a pair of rolls 71 for winding and housing the covering members 4A and 4B and covering the first and second conductors 2 and 3 with the covering members 4A and 4B drawn from the roll 71. And a step of removing portions (removal portions 4a to 4e) where the pair of covering members 4A and 4B are in contact with each other by punching or the like.

(1) Step of supplying conductor FIG. 3 is a perspective view schematically showing a step of drawing out the first and second conductors from the reel. The reel 5 around which the first and second conductors 2 and 3 are wound is held by a holding member (not shown) and arranged in parallel with the width direction of the first and second conductors 2 and 3.

  In this step, a plurality of first and second conductors 2 and 3 having a required length are pulled out from the reel 5. Note that the wiring material 1 in which different conductive materials are mixed may be manufactured by storing a plurality of different conductive materials in the reel 5 and pulling out the conductive material from the reel 5.

(2) Step of bending first and second conductors FIG. 4 is a perspective view schematically showing a step of bending the first and second conductors. FIG. 5 is a perspective view schematically showing a state in which the first and second conductors are bent. In this step, the first and second conductors 2 and 3 are bent using bending apparatuses 6A and 6B described later, and the first conductor 2 and the second conductor 3 are arranged so as not to be in electrical contact with each other. FIG. 4 shows only some bending apparatuses 6A and 6B.

  FIG. 8 shows an outline of the bending apparatus, (a) is a perspective view of a fixed member, (b) is a perspective view of a movable member, and (c) is a perspective view showing a state in which the fixed member and the movable member are combined. FIG. The bending device 6A includes an arcuate surface 611a and a width of the first conductor 2 between the first flat surface 611b and a first protrusion 611 having a first flat surface 611b and a flat surface 611c following the arc-shaped surface 611a. A cylindrical fixing member 61 provided with a second protrusion 612 having a flat surface 612a that is provided at the same distance and fixes the first conductor 2 and moves along the arcuate surface 611a. And a columnar movable member 62 having a third protrusion 621 provided with a second flat surface 621a. The fixed member 61 and the movable member 62 are installed on the same axis, and have contact surfaces 610 and 620 that come into contact with the fixed member 61 so that the movable member 62 can rotate. The fixing member 61 is supported by a support portion (not shown). The movable member 62 has a rotation shaft 62a, and rotates by a drive unit (not shown) or manual operation. FIG. 8 shows a bending device 6A that bends the first conductor 2 in the clockwise direction.

  The bending device 6B has the same configuration as the bending device 6A, although the size of each part such as a diameter is different from that of the bending device 6A.

  9A and 9B show the operation of the bending apparatus, wherein FIG. 9A is a cross-sectional view showing a state before the first conductor is bent, and FIG. 9B is a cross-sectional view showing a state after the first conductor is bent. FIG. In order to bend the first conductor 2, the first flat surface 611 b of the first protrusion 611 of the fixing member 61 is brought into contact with the side surface 2 a of the first conductor 2, and the flat surface 612 a of the second protrusion 612. Is brought into contact with the side surface 2 b of the first conductor 2 to fix the first conductor 2.

  Next, as shown in FIG. 9A, the fixing member 61 is arranged such that the side surface 2b opposite to the side surface 2a of the first conductor 2 with which the first flat surface 611b contacts is in contact with the second flat surface 621a. And the movable member 62 are combined to bring the contact surfaces 610 and 620 into contact.

  Next, from the state in which the second flat surface 621a is in contact with the side surface 2b of the first conductor 2, the movable member 62 is rotated around the rotation shaft 62a, and as shown in FIG. The second flat surface 621a is moved along the arcuate surface 611a, and the first conductor 2 is bent, for example, 90 degrees. That is, the first conductor 2 is bent by pressing the first conductor 2 against the arcuate surface 611a and the flat surface 611c while the second flat surface 621a moves.

  The first conductors 2 are bent by the bending device 6A so as not to overlap each other in the direction of 90 degrees with respect to the center line 1a, and as shown in FIG. 5, the first trunk portion 21 and the first branch portion The shape has 22. Similarly to the first conductor 2, the second conductor 3 is also bent by the bending device 6B in the direction of 90 degrees with respect to the center line 1a so as not to overlap the first conductor 2 and the second trunk 31. And a shape having the second branch portion 32.

  Next, the bent first and second conductors 2 and 3 are arranged so as not to be in electrical contact with each other. Note that some of the first or second conductors 2 and 3 may be kept straight without being bent. Further, the bending devices 6A and 6B can easily change the angle at which the first and second conductors 2 and 3 are bent by changing the shape of the arcuate surface 611a and the flat surface 611c and the rotation angle of the movable member 62.

(3) Step of covering first and second conductors FIG. 6 is a perspective view schematically showing a step of covering the first and second conductors with a covering member. The covering members 4A and 4B are wound around the pair of rolls 71 and stored. The pair of rolls 71 are held by holding members (not shown) on the upper side and the lower side of the first and second conductors 2 and 3 so as to be parallel to the width direction of the first and second conductors 2 and 3. ing.

  In this step, the covering members 4 </ b> A and 4 </ b> B are pulled out from the pair of rolls 71 while supplying the first and second conductors 2 and 3 from the reel 5. As shown in FIG. 7 described later, the covering members 4A and 4B overlap each other in a rectangular region surrounded by both end portions 20a and 20b of the first conductor 2 and both end portions 30a and 30b of the second conductor 3, The first and second conductors 2 and 3 are covered so that both ends 20a and 20b of the first conductor 2 and both ends 30a and 30b of the second conductor are exposed. Note that the first and second conductors 2 and 3 may be covered by folding back the covering member 4 drawn from one roll 71.

(4) Step of Removing Covering Member FIG. 7 is a perspective view schematically showing a step of removing the removed portion of the covering member. In this step, the removal portions 4a to 4e where the covering member 4 is in contact with each other are removed leaving a bonding margin by punching with a mold or cutting with a cutter, laser, or the like. Although FIG. 7 shows a state where the removed portion 4a is removed, the other removed portions 4b to 4e are similarly removed.

  Next, the end 20b of the first conductor 2 and the end 30b of the second conductor exposed from the covering member 4 are cut into a predetermined length as necessary.

(Effects of the first embodiment)
According to the present embodiment, the following effects can be obtained.
(A) By disposing the first conductor 2 and the second conductor 3 having a width larger than the width of the first conductor 2 on the wiring member 1, transmission of signals and power by one wiring member 1. Is possible.
(A) By bending the first and second conductors 2 and 3 with the bending devices 6A and 6B, a wiring shape matched to the shape of the secondary battery device 10 or the like can be easily obtained. In addition, since the connecting step of connecting the first trunk portion 21 and the first branch portion 22, and the second trunk portion 31 and the second branch portion 32 can be omitted, the thickness of the wiring member 1 is increased. While being able to suppress, the manufacturing process of the wiring material 1 can be simplified.
(C) Since the etching process can be omitted in the manufacturing process of the wiring material 1, the manufacturing cost of the wiring material 1 can be reduced, and the dimensions of the wiring material 1 of the photolithography apparatus used in the process of forming the wiring pattern can be reduced. It is not limited by size. Therefore, the wiring material 1 having a desired length can be easily manufactured.
(D) By making the cross-sectional shape of the first and second conductors 2 and 3 rectangular, the thickness can be reduced as compared with a wiring material using a round conductor. Moreover, conductor resistance can be reduced compared with the wiring material using the conductor which uses copper foil, or a conductor with a circular cross-sectional shape.

[Second Embodiment]
FIG. 10 is a perspective view showing the appearance of the wiring material according to the second embodiment of the present invention.

  In the wiring member 1 of the first embodiment, the first and second conductors 2 and 3 are covered by the pair of covering members 4, but in the wiring member 1A of the present embodiment, the first covering member is covered. The first and second conductors 2 and 3 are covered by being divided by 41 and the second covering member 42. The following description will focus on differences from the first embodiment.

  The first covering member 41 of the present embodiment includes a pair of first covering members 41A and 41B. The pair of first covering members 41A and 41B includes the end portion 20a of the first conductor 2 and the first covering member 41A. The first and second trunk portions 21 and 31 are covered so that the end portion 30a of the second conductor 2 is exposed.

  The second covering member 42 includes a pair of second covering members 42 </ b> A and 42 </ b> B. The pair of second covering members 42 </ b> A and 42 </ b> B includes the end portion 20 b of the first conductor and the end of the second conductor 3. The first and second branch portions 22 and 32 are covered so that the portion 30b is exposed. The second covering member 42 covers a part of the first and second trunk portions 21 and 32 so as to overlap the first covering member 41.

(Method for manufacturing wiring material)
Next, an example of a method for manufacturing the wiring material 1A according to the present embodiment will be described. The manufacturing method of the wiring member 1A is a first covering in which a pair of rolls 71 for winding and storing the first covering members 41A and 41B is prepared, and the first and second trunk portions 21 and 31 are drawn from the roll 71. A step of covering with the members 41A and 41B and a pair of rolls 72 for winding and storing the second covering members 42A and 42B are prepared, and the first and second branch portions 22 and 32 are pulled out from the roll 72. Covering with the covering members 42A and 42B.

(1) Step of covering with first covering member In this step, as shown in FIG. 6, while supplying the first and second conductors 2 and 3 from the reel 5, from the pair of rolls 71 The first covering members 41A and 41B are pulled out. Then, the first and second trunk portions 21, so that the end portion 20a of the first conductor 2 and the end portion 30a of the second conductor 3 are exposed by overlapping the pair of first covering members 41A and 41B, 31 is coated. Next, portions where the first covering members 41A and 41B are in contact with each other are removed by punching or the like.

(2) Step of Covering Using Second Cover Member FIG. 11 is a perspective view schematically showing a step of covering the first and second conductors 2 and 3 with the second cover members 42A and 42B. . The pair of rolls 72 are held by holding members (not shown) from above and below the first and second conductors 2 and 3 so as to be parallel to the direction along the center line 1a of the wiring member 1A.

  In this step, the second covering members 42A and 42B are pulled out from the pair of rolls 72 in a direction perpendicular to the center line 1a of the wiring member 1A. Then, the first and second branch portions 22 and 32 are exposed such that the end portion 20b of the first conductor 2 and the end portion 30b of the second conductor are exposed by overlapping the pair of second covering members 42A and 42B. Coating.

(Effect of the second embodiment)
According to the present embodiment, the first and second branch portions are covered by overlapping the first and second conductors 2 and 3 with the first and second covering members 41 and 42. 22, 32, the 1st and 2nd bending parts 23 and 33 can be reinforced. Moreover, since the area which removes a covering member can be made smaller than covering the whole collectively like 1st Embodiment, 1 A of wiring materials can be manufactured at low cost.

[Third Embodiment]
FIG. 12 is a plan view showing a secondary battery device on which the wiring material according to the third embodiment of the present invention is mounted. 13 is a cross-sectional view taken along line AA in FIG.

  The wiring member 1B of the present embodiment is different from the first embodiment in that the third conductor 8 is arranged so as to enter the gap d between the adjacent first conductors 2 via the covering member 4. Different. The following description will focus on differences from the first embodiment.

  The wiring member 1B according to the present embodiment has the same thickness and width as the first conductor 2, and the third conductor 8 disposed on the same plane as the first and second conductors 2 and 3. And a third covering member 43 covering the upper surface 8a of the third conductor 8 exposed from the covering member 4. The third conductor 8 is insulated from the first conductor 2 by the covering member 4.

  The secondary battery device 10 </ b> A includes a control board 14 </ b> A that controls signals and the like input from the first conductor 2 and the third conductor 8, and a control board 14 </ b> B that controls power and the like input from the second conductor 3. .

  The third conductor 8 has one end 80a connected to the signal control board 14A and the other end 80b connected to the positive electrode 11A or the negative electrode 11B of the battery cell 11.

(Method for manufacturing wiring material)
Next, an example of a method for manufacturing a wiring material according to the present embodiment will be described. FIG. 14 is a schematic diagram showing a method for manufacturing a wiring material, wherein (a) and (b) show a first member and a second member, respectively. FIG. 15 is a schematic diagram showing a method for manufacturing a wiring material, and shows a state in which a first member and a second member are overlapped.

  The manufacturing method of the wiring member 1B includes a step of producing a first member 9A in which the first and second conductors 2 and 3 are covered with a pair of covering members 4, and an upper surface 8a of the third conductor 8 is formed on the third surface. It includes a step of producing the second member 9B covered by the covering member 43 and a step of superposing the first member 9A and the second member 9B.

  In the step of manufacturing the first member 9A, the plurality of first and second conductors 2 and 3 are pulled out from the reel 5, and the pulled out first and second conductors 2 and 3 are 90 degrees with respect to the center line 1a. Are bent using the bending devices 6A and 6B so as not to overlap each other. Next, the bent first and second conductors 2 and 3 are covered with a pair of covering members 4.

  In the step of manufacturing the second member 9B, the third conductor 8 is supplied from the reel 5, and the supplied third conductor 8 is bent using a bending device 6A in a direction of 90 degrees with respect to the center line 1a. Next, the upper surface 8a of the bent third conductor 8 is covered with the third covering member 43 so that the end portions 80a and 80b are exposed.

  In the step of superimposing the first member 9A and the second member 9B, the third conductor 8 enters the gap d between the adjacent first conductors 2 and ends of the third conductor 8 The first member 9A and the second member 9B are overlapped and joined by an adhesive, fusion, or the like so that the portion 81b is disposed at a predetermined position. Next, a portion where the pair of covering members 4 are in contact with each other and a portion where the covering member 4 and the third covering member 43 are in contact are removed by punching or the like, and the covering member 4 and the third covering member 43 are removed as shown in FIG. The shape shown in

  In the present embodiment, the third conductor 8 enters a gap between the adjacent first conductor 2 and the second conductor 3 or a gap between the adjacent second conductors 3. You may arrange. Alternatively, the width of the third conductor 8 may be the same as the width of the second conductor 3, and the third conductor 8 may be disposed so as to enter the gap between the adjacent first conductors 2.

(Effect of the third embodiment)
According to the present embodiment, the third conductor 8 enters between the adjacent first conductors 2, between the second conductors 3, or between the first and second conductors 2 and 3. By disposing the first and third conductors 2, 3, and 8, the increase in the thickness and width of the wiring member 1 </ b> B can be suppressed.

[Modification]
FIG. 16 is a plan view showing a modification of the present invention. FIGS. 16A and 16B show Modification 1 and Modification 2, respectively.

  Embodiments of the present invention are not limited to the above-described embodiments, and various modifications and implementations can be made without departing from the scope of the present invention. For example, as in the wiring material 1C shown in FIG. 16A, a pair of linear second conductors 3 may be arranged at the center of the wiring material 1C.

  Moreover, it is good also as a structure which bends the edge part 30a side of the 2nd conductor 3, like wiring material 1D shown in FIG.16 (b). As shown in FIG. 6, the wiring member 1D covers the first and second conductors 2 and 3 with a pair of covering members 4, and then separates the second conductor 3 from the reel 5 and bending apparatus 6B. And then covering the first and second conductors 2 and 3 with a pair of covering members 4 so that the end 30a of the second conductor 3 is exposed.

  Further, the wiring material may have one second conductor 3 instead of a plurality. In this case, for example, power can be supplied from the second conductor 3 to the control board or the like by forming a closed circuit with the second conductor 3 and a common ground in the apparatus.

  In the first to third embodiments, the first and second branch portions 22 and 32 of the wiring material are formed so as to extend on both sides of the wiring material. The portions 22 and 32 may be formed to extend only on one side of the wiring material. Further, the wiring material may have a single first conductor 2 instead of a plurality.

  Further, the wiring material may have a linear first conductor 2 and a bent second conductor 3.

  The manufacturing methods of the above embodiments can add, delete, replace, and replace processes without departing from the scope of the present invention.

  The present invention is applicable to, for example, electrical equipment, secondary battery devices, automobiles, voltage monitoring wiring materials, power transport lines, signal lines, mobile phones, communication equipment, information terminal equipment, measuring equipment, home appliances, and the like.

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C, 1D ... Wiring material, 1a ... Center line, 2 ... 1st conductor, 2a, 2b ... Side surface, 3 ... 2nd conductor, 4, 4A, 4B ... cover member, 4a-4e ... removed part, 5 ... reel, 5a, 5b ... groove, 6A, 6B ... bending device, 8 ... third conductor, 8a ... upper surface, 9A ... first member, 9B ... second member, 10, 10A ... secondary battery device, 11 ... battery cell, 11A ... positive electrode, 11B ... Negative electrode, 12 ... Busbar, 13 ... Thermistor, 14, 14A, 14B ... Control board, 20a, 20b, 30a, 30b, 80a, 80b ... End, 21 ... 1st trunk part, 22 ... 1st branch part, 23 ... 1st bending part, 31 ... 2nd trunk part, 32 ... 2nd branch part, 33 ... 2nd bending part, 41, 41A, 41B ... 1st coating member, 42, 42A, 42B ... 2nd coating member, 43 ... 3rd coating member, 61 ... fixing member , 62 movable member, 62a ... rotating shaft, 610 ... contact surface, 611 ... first protrusion, 611a ... arc-shaped surface, 611b ... first flat surface, 611c ... Flat surface, 612, second protrusion, 612a, flat surface, 621, third protrusion, 621a, second flat surface, 71, 72, roll, d. ..Voids

Claims (8)

One or a plurality of first conductors having a predetermined cross-sectional shape and a width equal to or greater than the predetermined thickness;
One or a plurality of second conductors having a predetermined thickness and a width larger than the width of the first conductor, and arranged with a gap between the first conductor;
A covering member that covers the first and second conductors so that both ends of the first and second conductors are exposed;
At least one of the first and second conductors is bent, and the first conductor and the second conductor are arranged so as not to be in electrical contact;
Wiring material. The thickness of the first and second conductors is in the range of 0.3 mm to 0.5 mm.
The wiring material according to claim 1. The cross-sectional area of the second conductor is in the range of 2.5 mm ² or more and 9 mm ² or less.
The wiring material according to claim 1 or 2. The cross-sectional shape of the first and second conductors is a rectangle.
The wiring material according to any one of claims 1 to 3. Arranged via the covering member so as to enter the gap between the adjacent first conductors, the gap between the adjacent second conductors, or the gap between the first and second conductors. Further comprising a third conductor,
The wiring material according to any one of claims 1 to 4. The wiring material according to claim 1 is provided.
Secondary battery device. The wiring material according to claim 1 is provided.
Electronics. Supplying a first conductor having a predetermined thickness and a width equal to or greater than the predetermined thickness and a second conductor having a predetermined thickness and a width greater than the width of the first conductor;
Bending at least one of the first and second conductors and disposing the first conductor and the second conductor so as not to make electrical contact;
Covering the first and second conductors so that both ends of the first and second conductors are exposed by overlapping a pair of covering members.
Manufacturing method of wiring material.

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