JP2007048796A - Wiring metal fitting and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring metal fitting which is a constituent member of a storage element connecting plate used for an electric car or a hybrid vehicle, capable of improving the productivity and assembling performance of parts while improving economical efficiency. <P>SOLUTION: The wiring metal fitting 1 is formed of a plate-like first bus bar 12f integrally formed with a terminal 11, and a second bus bar 12g formed with the first bus bar 12f so as to be weldable thereto so that the bus bar can avoid a communication hole other than a communication hole having the terminal circularly provided therewith and can be prevented from interfering with a bus bar of the other wiring metal fitting. The first and second bus bars 12f and 12g are welded as necessary to be used, and if the bus bar has an excessive length, processing such as cutting is applied to the excessive length to use the bus bar 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiring fitting as a constituent member of a storage element connection plate used in, for example, an electric vehicle or a hybrid car and interconnecting a plurality of storage elements, and a method for manufacturing the same.

  An electric vehicle using an electric motor, a hybrid vehicle using an electric motor and an internal combustion engine in combination, and the like, use a storage element connection plate to electrically connect a plurality of storage elements together.

  According to the shape of the electrode provided on the power storage element, this power storage element connection plate differs in connection means with the electrode.

  For example, the type in which the electrode protrudes from the center of the top surface of the battery cell (storage element), such as the positive electrode of a dry battery, and the thread is threaded on the electrode is provided with a through-hole for communicating the electrode. The battery electrode connection portion and the electrode are connected by tightening the bolt after the electrode is communicated with the through hole using the battery electrode connection portion.

  Further, this type of storage element connection plate is provided with a terminal for voltage check detection between battery cells (storage elements) connected in series. In the case of the above-described storage element connection plate, a voltage check detection terminal is disposed so as to overlap the battery electrode connection part, and is fastened together with the battery electrode connection part by a bolt (see, for example, Patent Document 1).

  This voltage check detection terminal is connected to a voltage detection element appropriately provided in the plate via a lead wire, or several types of shapes are prepared according to the layout of the voltage detection element and connected to the voltage detection element. ing.

  In addition to the above connecting means, there are the following. That is, as shown in FIG. 7, in the case of the electricity storage device B provided with two annular electrodes b <b> 1 and b <b> 2 (no screw portion) protruding so as to be concentric on the top surface, A plurality of annular terminal fittings f1 that can be fitted to the middle annular electrode b1 are provided according to the number of power storage elements, and the middle annular electrode b1 and the terminal fitting f1 are aligned, and then the storage element connection plate F The electrode and the terminal fitting are fitted and connected by pushing.

  Furthermore, a substantially annular voltage check detection terminal f2 is provided on the bottom surface of the storage element connection plate F at a position corresponding to the outer annular electrode b2 protruding from the top surface of the storage element B, and the intermediate annular electrode b1 and the terminal are provided. Simultaneously with the fitting with the metal fitting f1, the terminal f2 for voltage check detection is brought into pressure contact with the outer annular electrode b2. Further, the voltage check detection terminal f2 is connected to an electronic component or a circuit board by a soldered lead wire.

In addition, this type of storage element connection plate is disposed above the storage element, disposed below the storage element as described above, and when a desired number of storage elements are stacked in a vertical direction. Are arranged in the middle, and in any case, the terminals for voltage check detection are provided so as to be in pressure contact with each other. In this case, the voltage check detection terminal is connected to the electronic component or the circuit board by the soldered lead wire.
JP 2004-95380 (3rd page, FIG. 2)

  As described above, the voltage check detection terminal in the storage element connection plate is connected to the voltage detection element appropriately provided in the plate via the lead wire, or there are several types depending on the layout of the voltage detection element. As a result of preparing the shape and connecting it to the voltage detection element, there was a problem in the productivity and assembly of parts.

  Accordingly, the inventors of the present invention have integrally formed the terminal portion and the strip-shaped busbar portion, and further created a wiring fitting having a shape that can be shared and shared with different positions of the power storage device. There has been a case where the number of power storage elements to be connected by the connection plate deviates from the setting range that can be shared.

  That is, the shape of the bus bar portion is characterized, and means for cutting the extra length of the bus bar portion according to different arrangement positions of the power storage elements is adopted. However, the extra length to be cut is short to long. Extreme differences have occurred, and extremely uneconomical cases have arisen.

  Then, this invention is made | formed in view of such a condition, and it aims at providing the wiring metal fitting which can solve the said problem, and its manufacturing method.

In order to achieve the above technical problem, the wiring metal fitting and the manufacturing method thereof according to the present invention employ the following technical means.
That is, the wiring fitting according to claim 1 is a wiring fitting that is used for a storage element connection plate that interconnects a plurality of storage elements, and that is brought into contact with the electrodes of the storage element to conduct electricity. A terminal portion that is mounted in the communication hole and abutted with the electrode of the storage element, and a strip-shaped bus bar portion that is connected to the terminal portion and is routed to the plate body, the bus bar portion Is welded to the first bus bar part that is integrally formed with the terminal part and cut at a required position, and is cut at the required position while being welded to the uncut tip of the first bus bar part. It consists of a 2nd bus-bar part.
According to a second aspect of the present invention, there is provided the wiring fitting according to the first aspect, wherein the terminal portion is formed in a substantially annular shape, and the bus bar portion is arranged at a plurality of positions so as to avoid communication holes arranged in a matrix on the plate body. A bent portion toward the lead-out portion of the plate body that is bent and connected to the outside, and a connecting portion that connects the bent portion adjacent to the terminal portion and other adjacent bent portions, and the terminal portion. It is formed so that it may space apart with respect to the straight line which connects the centers of the communicating holes in which the said bus bar is arrange | positioned for every connection part which goes to the said derivation | leading-out part.
The manufacturing method of the wiring metal fitting concerning Claim 3 is a manufacturing method which manufactures the wiring metal fitting of Claim 1 or 2, Comprising: In the 1st metal mold | die, the said terminal part and the said terminal part connected with the said terminal part The upstream portion of the bus bar portion is integrally formed, and the second die is integrally formed from the end portion of the upstream portion to the downstream portion that is the end of the bus bar portion.

  According to the present invention, the terminal portion and the strip-shaped bus bar portion are integrally formed, formed into a shape that can be shared and shared with different arrangement positions of the power storage elements, and the bus bar portion at the required position. Therefore, it is no longer necessary to prepare several types of wiring fittings according to the layout of the voltage detection element by dividing it so that it can be welded. Can do.

Next, an embodiment of the wiring fitting according to the present invention will be described. In the figure, reference numeral 1 denotes a wiring fitting, and reference numeral 2 denotes a plate body.
As shown in FIG. 1, the wiring fitting 1 according to the present embodiment has storage elements B arranged in a matrix form of two upper and lower stages 3 × 6 across an intermediate plate a2, and the upper storage element B is mounted. A plurality of power storage elements B can be connected in series with the upper plate a1 disposed so as to perform, the lower plate a3 disposed so as to cover the lower power storage element B, and the intermediate plate a2. In the power storage device A sandwiched between the two, each is disposed in each plate. In the present embodiment, the one disposed on the intermediate plate a2 is illustrated.

  The power storage element B is a high-capacity capacitor having an external shape formed in a substantially square column shape and having electrodes (positive electrode and negative electrode) on the upper and lower surfaces thereof. Furthermore, this electrode has two annular electrodes (see FIG. 7) formed so as to be concentric, and the middle annular electrode b1 is connected in series with another power storage element B via a plate, The outer annular electrode b2 is connected to a voltage check electronic component via the wiring fitting 1 and the lead-out portion 25, which are the main parts of the present invention.

Hereinafter, the wiring metal fitting 1 that is the main part of the present invention and the storage element connection plate a2 (intermediate plate) using the wiring metal fitting 1 will be described in detail.
As shown in FIGS. 2 and 3, the wiring fitting 1 according to the present embodiment is configured to include a terminal portion 11 and a bus bar portion 12.

  The terminal portion 11 is formed with a plate-like member bent in a mountain shape so as to be able to collide with the outer electrode of the electricity storage element B, and has a pair of rectangular shapes on the center line of the substantially annular plate-like member. The locking piece 11a is formed so as to overhang, and is attached to a communication hole 21 provided in the plate body 2 described later.

  The bus bar portion 12 has the same pitch as the arrangement pitch of the communication holes 21 arranged in parallel in the plate body 2 to be described later, and has a plurality of intermediate portions (five locations in FIG. 2) so as to avoid the communication holes 21. The terminal portion 11 is formed in a band plate shape having bent portions 12 a, 12 b, 12 c, 12 d, and 12 e that are bent in a U-shape, and is continuous with the side surface of one locking piece 11 a of the terminal portion 11. And a second bus bar portion 12g divided so as to be weldable to the end portion of the first bus bar portion 12f.

  That is, as shown in FIG. 3, the bus bar portion 12 of the present embodiment includes a first bus bar portion 12 f having a length from the terminal portion 11 to the second bent portion 12 b toward the right side, and a second bus bar portion 12 f. A plate main body 2 to be described later is formed by overlapping a second bent portion 12b, which is composed of a second bus bar portion 12g having a length from the bent portion 12b to the rightmost bent portion 12e, and welding the two overlapping bent portions 12b. A bus bar portion 12 having a required length corresponding to the above is formed.

  In addition, as shown in FIG. 2, the bus bar portion 12 includes a connecting portion 12j that connects adjacent bent portions 12a to a connecting portion 12h that is continuous with the side surface of one locking piece 11a of the terminal portion 11. , 12k, 12m, 12n, and 12p are formed so as to gradually move toward the bent portion 12a... As they are separated from the terminal portion 11, and as shown in FIG. The bent portions 12a are bent in a concave shape.

  As shown in FIG. 3, the bending depth of the bent portions 12a... Gradually decreases as the distance from the terminal portion 11 increases. When the bus bar portion 12 is routed on the plate body 2 described later, the insulating member 3 is bent. The bent portions 12a are prevented from interfering with each other through (see FIG. 6). The connecting portions 12h are formed so as to gradually move toward the bent portions 12a as they are separated from the terminal portion 11, so that the connecting portions 12h do not interfere with each other.

As shown in FIG. 4, the wiring fitting 1 according to the present embodiment configured as described above has a first bus bar portion according to the position of the communication hole 21 of the plate body 2 around which the terminal portion 11 is mounted. The bent portion 12b of the second bus bar portion 12g and the bent portion 12b of the second bus bar portion 12g are welded and used in the maximum length (FIG. 4: top stage), or used only in the first bus bar portion 12f (FIG. 4: from bottom to top) 2nd stage), the second bus bar portion 12g is appropriately cut, and the second bus bar portion 12g shortened by cutting is welded to the end portion (bent portion 12b) of the first bus bar portion 12f. It is used by length (FIG. 4: 3rd to 5th steps from bottom to top), and further, the first bus bar portion 12f (bent portion 12a) is cut and used only by the terminal portion 11 (FIG. 4: Bottom). In FIG. 4, the parallel hatched area indicates the excision range.
The wiring fitting 1 according to the present embodiment is a first mold (not shown), which integrally includes a terminal portion and a first bus bar portion 12f, and a second mold (not shown). Thus, the second bus bar portion 12g is formed.

  Hereinafter, the electricity storage element connection plate a2 using the wiring fitting 1 will be described. The power storage element connection plate a2 includes the wiring fitting 1 and the plate body 2 described above.

  As shown in FIGS. 5 and 6, the plate body 2 is formed in a substantially rectangular shape in plan view in which communication holes 21 are provided in a 3 × 6 matrix shape, as shown in FIGS. 5 and 6, and around each communication hole 21. The ribs 22 are protruded (the portions through which the bus bar portions 12 pass are notched), and the periphery of the communication holes 21 provided in the ribs 22 has a substantially square shape that is one step higher than the inner surface of the ribs 22. A stepped portion 23 is formed so as to protrude.

On the top surface of the stepped portion 23, a guide groove 24 having a rectangular cross section for accommodating the bent portions 12a of the bus bar portion 12 is formed. As shown in FIG. 4, the guide groove 24 is provided only in the longitudinal direction of the plate body 2 and on one side surface (upper side of the communication holes 21 in FIG. 5) with respect to the communication holes 21.
Further, a lead-out portion 25 that is electrically connected to each bus bar portion 12 is provided at the right end portion of the plate main body 2 when viewed from the surface side of the plate main body 2.

  On the back side of the plate body 2, the ribs 22 project around the respective communication holes 21 (the portions through which the bus bar portions 12 pass are cut out), as in the case of the front side described above. The periphery of the communication hole 21 provided in the rib 22 is projected in a substantially square shape that is one step higher than the inner surface of the rib 22 to form a step portion 23.

  Further, similarly to the front surface side of the plate body 2, a guide groove 24 having a rectangular cross section for accommodating the bent portions 12 a of the bus bar portion 12 is formed on the top surface of the step portion 23 on the back surface side of the plate body 2. Yes. The guide groove 24 is provided only in the longitudinal direction of the plate body 2 opposite to the guide groove 24 provided on the surface side of the plate body 2 and only on the other side surface (below the communication holes 21 in FIG. 5). It has been.

  Insulating members 3 formed along the guide grooves 24 are inserted into the guide grooves 24 formed on the front and back surfaces of the plate body 2.

  Next, a procedure for assembling the wiring fitting 1 in the electricity storage device connection plate a2 configured as described above will be described.

  First, the first bus bar portion 12f and the second bus bar portion 12g are cut according to the position of the communication hole 21 in which the terminal portion 11 is mounted, or the second bus bar is formed at the end of the first bus bar portion 12f. Necessary processing such as welding the portion 12g is performed.

  For example, in FIG. 5, in the case of the wiring fitting 1 to be mounted in the first communication hole 21 at the left end of the plate body 2 farthest from the plate end on the lead-out portion 25 side, the first bus bar portion 12f and the second bus bar The end portions of the portion 12g are welded to each other. 2 bus bar portions 12g are formed).

  In the case of the wiring fitting 1 to be mounted in the second communication hole 21 adjacent to the right, the bent portion 12e of the second bus bar portion 12g is cut, and the ends of the first bus bar portion 12f and the second bus bar portion 12g are connected to each other. Is used by welding.

Further, in the case of the wiring fitting 1 to be mounted in the third communication hole 21 adjacent to the right, it is cut from the bent portion 12d of the second bus bar portion 12g and the ends of the first bus bar portion 12f and the second bus bar portion 12g. The parts are welded together.
In this way, depending on the position of the communication hole 21 in which the terminal portion 11 is mounted, a total of 18 bent portions 12a are appropriately cut so that the bus bar portion 12 does not protrude from the plate end on the lead-out portion 25 side. Wiring fitting 1 is prepared.

  Then, as shown in FIG. 5, the terminal portions 11 are mounted around the communication holes 21 so as to form a staggered arrangement on the surface side of the plate body 2. At this time, the terminal portion 11 is mounted in each communication hole 21 while the bus bar portion 12 is inserted into the guide groove 24 in order from the left end to the right side of the plate body 2 far from the plate end on the lead-out portion 25 side. However, since the guide groove 24 is shared with the other bus bar portions 12, the insulating member 3 is sandwiched between the bus bar portions 12. In this way, the extending direction of the respective bus bar portions 12 and the bending direction of the bent portions 12a are aligned so that the terminal portions 11 are circularly arranged in the respective communication holes 21 in a staggered arrangement.

  Next, with respect to the communication holes 21 that are not mounted on the front surface side of the plate body 2, the terminal portions 11 are mounted on the respective communication holes 21 from the back surface side of the plate body 2 so as to form a staggered arrangement as described above. Then, the wiring fitting 1 is set.

  Thus, when the setting of the wiring metal fitting 1 is completed on the front surface side and the back surface side of the plate body 2, the end portions of the respective bus bar portions 12 and the lead-out portions 25 are soldered, and a series of assembly is completed.

  The power storage element connection plate a2 assembled as described above is used for the intermediate plate a2 of the power storage device A, and abuts with the annular electrode outside the power storage element B via the wiring fitting 1 and the lead-out portion 25. Connect to electronic components for voltage check.

  As described above, the power storage element connection plate a2 using the wiring fitting 1 according to the present embodiment integrally forms the terminal portion 11 and the strip-like bus bar portion 12, and corresponds to different arrangement positions of the power storage elements B. It is possible to form in a shape that is sharable and sharable, and further divide the bus bar portion 12 so that it can be welded at a required position, so that it is not necessary to prepare several types of wiring fittings 1 according to the layout of the voltage detection elements. Therefore, it is possible to improve the productivity and the assemblability of the parts while improving the economy.

  As mentioned above, although the wiring metal fitting concerning this Embodiment was demonstrated, embodiment mentioned above shows an example of suitable embodiment of this invention, and this invention is not limited to it, The Various modifications can be made without departing from the scope of the invention.

It is a perspective view of a power storage device. It is a top view of the wiring metal fitting concerning this Embodiment. It is a side view of the wiring metal fitting concerning this Embodiment. It is explanatory drawing which illustrated the usage example of the wiring metal fitting concerning this Embodiment. It is a top view (surface side) of the electrical storage element connection plate (intermediate plate) incorporating the wiring metal fitting concerning this Embodiment. It is sectional drawing which follows the XX line in FIG. It is a longitudinal cross-sectional view of the conventional electrical storage element connection plate (upper plate).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiring metal fitting 11 Terminal part 11a Locking piece 12 Bus bar part 12a, 12b, 12c, 12d, 12e Bending part 12h, 12j, 12k, 12m, 12n, 12p Connection part 12f 1st bus bar part 12g 2nd bus bar part 2 Plate body 21 Communication hole 22 Rib 23 Step portion 24 Guide groove 25 Lead-out portion 3 Insulating member B Power storage device A Power storage device a1 Upper plate a2 Power storage device connection plate (intermediate plate)
a3 Lower plate

Claims (3)

It is used for a storage element connection plate that interconnects a plurality of storage elements, and is a wiring fitting that is brought into contact with an electrode of the storage element to conduct electricity,
A terminal part that is mounted in a communication hole provided in the plate body and is brought into contact with the electrode of the electricity storage element; and a strip-like bus bar part that is connected to the terminal part and arranged in the plate body. ,
The bus bar portion is welded to a first bus bar portion that is integrally formed with the terminal portion and cut at a required position, and an uncut end of the first bus bar portion, and at a required position. A wiring bracket comprising a second bus bar portion to be cut. The terminal portion is formed in a substantially annular shape,
The bus bar portion is bent at a plurality of points in the middle so as to avoid the communication holes arranged in a matrix on the plate body, and a bent portion toward the lead-out portion of the plate body connected to the outside,
A connecting portion connecting the bent portion adjacent to the terminal portion and other adjacent bent portions;
2. The wiring according to claim 1, wherein the wiring portion is formed so as to be separated from a straight line connecting the centers of the communication holes in which the bus bars are arranged for each connection portion from the terminal portion toward the lead-out portion. Hardware. A manufacturing method for manufacturing the wiring fitting according to claim 1 or 2,
In the first mold, the terminal part and the upstream part of the bus bar part connected to the terminal part are integrally molded,
A method of manufacturing a wiring fitting, wherein the second mold integrally molds from an end portion of the upstream portion to a downstream portion that is an end of the bus bar portion.

Images