JP2009076320A - Apparatus and method for manufacturing laminated bus bar circuit boards, bus bars and power converter manufactured by them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and method for manufacturing bus bar circuit boards by inserting an insulating material between metallic plates when providing a terminal portion on a bus bar body, laminating and bonding metallic plates and further capable of bonding the circuit boards easily and accurately by a small or space saving facility without using a large-scale bus-bar lamination machine, and to provide bus bars. <P>SOLUTION: The laminated busbar circuit board manufacturing apparatus for connecting electronic parts with a busbar lamination member A made by lamination of metallic plates and insulating materials equipped with a first pressure apparatus comprising a lower pressure fixture 17 fixing the busbar laminated member A, a lower thermoelectric element 18 placed below the lower pressure fixture 17, a lower insulating plate 19, and a lower rigid weight body 20 and a second pressure apparatus comprising an upper pressure fixture 16, an upper thermoelectric element 15, an upper insulating plate 14, and an upper rigid weight body 13 that are placed vertically upwards in this sequence above the first pressure apparatus. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an apparatus for manufacturing a laminated busbar circuit board that constitutes an internal circuit of an electrical junction box that contains a power device such as a transistor, a main circuit capacitor, a fuse used for wiring of an electronic circuit, etc. The present invention also relates to a manufacturing method, a bus bar manufactured thereby, and a power conversion device.

Conventionally, in a power conversion device, a bus bar circuit board constituting an internal circuit of an electric junction box containing a power device such as a transistor, a main circuit capacitor, a fuse used for wiring of an electronic circuit, etc. As shown in Patent Document 1.
FIG. 6 is a perspective view of an internal bus bar laminated circuit board used in a general power converter. In FIG. 6, 37 is a power converter, 38 is a fuse, 39 is a main circuit capacitor, 40 is a transistor, and 41 is a bus bar circuit board. The bus bar circuit board 41 is composed of a plurality of bus bars and a wiring board provided with grooves for wiring the bus bars, and these are stacked inside the electric junction box containing the main circuit capacitor 39 and the transistor 40. is there. The bus bar circuit board 41 is formed by punching a conductive thin metal plate based on a pre-designed pattern, and folding terminal portions that become electrical terminals such as tab terminals and receptacle terminals upward or downward as necessary. It is constructed by standing up by bending.
By the way, the manufacturing method of forming a bus bar by punching in this way and connecting and laminating metal plates to each other is composed of a manufacturer's original laminating machine, and the number of manufacturers is limited.
In addition, the manufacturing method of constructing the bus bar by punching and laminating the metal plate and the insulating material is composed of a manufacturer's original laminating machine, and the laminating machine uses a vacuum device to apply pressure for pressure laminating. The equipment is large and expensive, such as using steam as the heat source to dissolve the adhesive applied or adhered to the insulating material, so it is necessary to secure a production volume commensurate with the investment when investing in the laminating machine or canceling costs In the case of making a production request in a small amount, the parts become expensive and the price of the power converter is high, which is uneconomical.
In addition, assembly jigs for laminating metal plates and insulating materials are the same as those for pressure heating lamination, so the production volume is limited and additional equipment is required to increase the production volume. However, since the laminating machine is large, a large installation space has to be secured, which is uneconomical.

Here, as a method of manufacturing a bus bar by applying such pressure, an ultrasonic bonding method has been well known in the past. This ultrasonic bonding method is configured to provide a flexural vibration member, a rigid weight body, and a load generation portion in a direction perpendicular to the vibration direction of the ultrasonically vibrating chip, thereby fastening and fixing the terminal member to the chip. The chip side terminal member and the bus bar body fixed to the ampil side can be fixed firmly and without disturbing the ultrasonic vibration of the terminal member on the chip side during the ultrasonic vibration. Thus, the pressure and ultrasonic vibration necessary for joining are efficiently transmitted, and when the terminal member is erected on the bus bar body, repeated ultrasonic joining is performed. Thus, the conventional apparatus welds and connects metals by ultrasonic vibration.
Japanese Patent Laid-Open No. 10-21747 (Specifications, pages 2 to 3, FIGS. 16 to 18)

  However, such a method is an overlap bonding between metal plates, and the original purpose is to weld metal plates together to provide an electrical connection terminal such as a tab terminal. A terminal portion is provided on the bus bar main body and the metal plates are overlapped and joined, but it is not suitable for the equipment machine to construct an insulated and laminated bus bar circuit board by sandwiching an insulating material between the metal plates.

Moreover, as a method of manufacturing a bus bar by applying such pressure, there is one shown in FIG.
FIG. 5 is a front view of a conventional bus bar laminating machine, 30 is a bus bar laminating machine, 31 is a pressurizing means, 32 is a rigid weight body, 33 is an upper heater block, 34 is a lower heater block, 35 is an upper assembly jig, Reference numeral 36 denotes a lower assembly jig.
In the method of FIG. 5, a lower pressurizing assembly jig 36 is provided on the lower heater block 34 of the bus bar laminating machine 30, and a metal plate (not shown) is insulated between the lower pressurizing assembly jig 36 and the upper pressurizing assembly jig 35. A method of laminating members to be stacked so as to overlap each other and pressing the rigid weight body 32 downward on the pressure assembly jigs 35 and 36 integrated using the pressurizing means 31 It is.

  However, in such a method, the pressure means for superimposing the metal plate and the insulating material applies pressure under vacuum, or using steam as a heat source for dissolving the adhesive applied or adhered to the insulating material, The equipment was complicated and large, and the production sites were limited.

  The present invention has been made in order to solve the above problems, and when a bus bar body is provided with a terminal portion and metal plates are overlapped and joined together, an insulating material is sandwiched between the metal plates so as to be insulated and laminated. The bus bar circuit board can be configured, the circuit design is free, the circuit integration can be achieved, and the power converter can be miniaturized. To provide a manufacturing apparatus and a manufacturing method of a laminated bus bar circuit board that can be easily and accurately joined using a small and space-saving equipment without using the equipment, and a bus bar and a power conversion device manufactured thereby. With the goal.

The invention according to claim 1 is a laminated bus bar circuit board manufacturing apparatus for manufacturing a laminated bus bar circuit board that connects electronic components using a bus bar laminated member in which a metal plate and an insulating material are laminated and laminated. A lower pressure jig that fixes the bus bar laminated member, a lower rigid weight body provided vertically below the lower pressure jig, and disposed between the lower pressure jig and the lower rigid weight body, and A lower thermoelectric element for melting the adhesive applied or adhered to the laminated member by heat to firmly bond the metal and the insulating material; and a lower insulating plate for electrically insulating the lower thermoelectric element. A first pressurizing device, an upper pressurizing jig disposed vertically above the first pressurizing device and a gap, an upper rigid weight body provided vertically above the upper pressurizing jig, and the upper pressurizing jig. Press jig and upper rigidity And an upper thermoelectric element for firmly bonding the metal and the insulating material to each other and electrically bonding the lower thermoelectric element. A second pressure device having an upper insulating plate for electrically insulating, two support rods for supporting both ends of the upper rigid weight body and the lower rigid weight body in a vertical direction, and A load generating device that is provided at the upper end of the support bar and applies a load toward the upper rigid weight body from above is provided.
According to a second aspect of the present invention, there is provided a laminated bus bar circuit board manufacturing method for manufacturing a laminated bus bar circuit board that connects electronic components using a bus bar laminated member in which a metal plate and an insulating material are laminated and laminated. The bus bar laminated member is fixed to the lower pressure jig, a lower rigid weight body is provided vertically below the lower pressure jig, and a lower thermoelectric element is interposed between the lower pressure jig and the lower rigid weight body. And a first pressurizing device in which a lower insulating plate is arranged, an upper pressurizing jig is fixed vertically above the first pressurizing device and a gap, and the upper pressurizing jig is vertically above And a second pressurizing device in which an upper thermoelectric element and an upper insulating plate are disposed between the upper pressurizing jig and the upper rigid weight body. Rigid weight body and lower rigid body Both ends of the weight body are supported by two support rods in the vertical direction, a load generating device is provided at the upper end of the support rod, toward the bus bar laminated member fixed to the lower pressure jig, Laminating and fixing while applying pressure to the upper pressure jig by using the load generating device, by the upper thermoelectric element and the lower thermoelectric element, the adhesive applied or adhered to the laminated member is dissolved by heat, It is characterized in that the metal constituting the laminated member and the insulating material are firmly bonded.
According to a third aspect of the present invention, in the method for manufacturing a laminated bus bar circuit board according to the second aspect, the upper pressurizing jig and the lower pressurizing force are applied by passing a current through the upper thermoelectric element and the lower thermoelectric element. The laminated member is optimally pressure-laminated while varying the temperature of the jig.
According to a fourth aspect of the present invention, in the method of manufacturing a laminated bus bar circuit board according to the second or third aspect, the upper pressurizing jig generated by varying the currents of the upper thermoelectric element and the lower thermoelectric element, and The state of the surface temperature of the lower pressurizing jig is monitored and displayed.
According to a fifth aspect of the present invention, in the method for manufacturing a laminated bus bar circuit board according to the second aspect, the surface of the metal plate is plated with a conductive metal.
A sixth aspect of the present invention is a bus bar manufactured by the method for manufacturing a laminated bus bar circuit board according to any one of the second to fifth aspects.
The invention described in claim 7 is a power conversion device on which the bus bar according to claim 6 is mounted.

  In consideration of such a situation, if a pressure jig and a thermoelectric element are attached to a press machine that is a load generating means as a manufacturing apparatus for a laminated bus bar made of a metal plate and an insulating material, it is possible to provide space-saving and inexpensively. did.

According to the bus bar manufacturing apparatus according to claim 1 and the bus bar manufacturing method according to claims 2 to 5 of the present invention, when the bus bar is laminated by sandwiching an insulating material between metal plates, current is supplied to the thermoelectric element. By increasing the temperature of the pressurizing jig while adding, the stacked busbars are optimally stacked by pressure, so that the laminated busbar circuit board can be configured simply and accurately insulated.
As a result, the circuit design of the laminated bus bar circuit board is free, circuit integration can be achieved, and the power converter can be miniaturized. In addition, if it is necessary to add a bus bar laminating machine to increase production volume, it can be mounted on a press machine, so the bus bar laminating machine can be downsized and the installation space can be reduced, so it is inexpensive and free. It is possible to arrange the assembly process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a schematic front view of a laminating press machine for manufacturing a bus bar showing an embodiment of the present invention, FIG. 2 is a right side view of the laminating press machine of FIG. 1, and FIG. 3 is a diagram of a bus bar showing an embodiment of the present invention. It is a whole perspective view of a bus bar manufactured by a manufacturing method.
1 to 3, 10 is a bus bar laminating press machine, 11 is a load generator, 12 is a support rod, 13 is an upper rigid weight body, 14 is an upper insulating plate, 15 is an upper thermoelectric element, and 16 is an upper pressing jig. , 17 is a lower pressing jig, 18 is a lower thermoelectric element, 19 is a lower insulating plate, 20 is a lower rigid weight body, 21 is a display, 22 is a display setting device, 23 is a thermoelectric element cable, 24 is a control device box, Reference numeral 25 denotes a bus bar circuit board, 26 denotes a bus bar, 27 denotes an insulating plate, 28 denotes a connection terminal, and 29 denotes a connection terminal hole.
The features of the present invention are as follows.
That is, in a laminated bus bar circuit board manufacturing apparatus (bus bar laminating press machine 10) for producing a laminated bus bar circuit board that connects electronic components using a bus bar laminated member A in which a metal plate and an insulating material are laminated and laminated, A lower pressing jig 17 to which the bus bar laminated member A is fixed, a lower rigid weight body 20 provided vertically below the lower pressing jig 17, and between the lower pressing jig 17 and the lower rigid weight body 20. The lower thermoelectric element 18 for firmly bonding the metal and the insulating material, and electrically insulating the lower thermoelectric element 18 by dissolving the adhesive applied or adhered to the laminated member by heat A first pressurizing device having a lower insulating plate 19, an upper pressurizing jig 16 arranged vertically above the first pressurizing device and a gap, and an upper vertical direction of the upper pressurizing jig 16 The upper rigid body 13 provided between the upper pressure jig 16 and the upper rigid body 13 is disposed between the upper rigid body 13 and the adhesive applied or adhered to the laminated member A by heat. A second pressurizing device having an upper thermoelectric element 15 for firmly bonding a metal and an insulating material, and an upper insulating plate 14 for electrically insulating the lower thermoelectric element 15, and the upper rigid weight body 13 And two support rods 12 for supporting both ends of the lower rigid weight body 20 in the vertical direction, and provided at the upper ends of the support rods 12, toward the upper rigid weight body 13 from above. And a load generator 11 for applying a load.
Here, in the manufacturing apparatus, the laminated member A is optimized while changing the temperature of the upper pressurizing jig 16 and the lower pressurizing jig 17 by passing current through the upper thermoelectric element 15 and the lower thermoelectric element 18. Pressure lamination is performed. Further, the surface temperature states of the upper pressurizing jig 16 and the lower pressurizing jig 17 generated by changing the currents of the upper thermoelectric element 15 and the lower thermoelectric element 18 are monitored and displayed. Moreover, the surface of the metal plate which comprises a laminated board is plated with the metal which has electroconductivity.
On the other hand, the thermoelectric elements 15 and 18 are directly embedded in the pressure assembly jigs 16 and 17 or installed on the surface, or separately as a heat block. For example, resistors are used for the thermoelectric elements 15 and 18. A temperature monitoring sensor is attached to the resistor or the assembly jig main body, and a constant temperature is set by a display setting unit 22 installed in the control box 24, and a temperature value can be monitored by the display unit 21.

Next, FIG. 3 is a perspective view of the laminated busbar circuit board according to this embodiment, and FIG. 4 is a perspective view of the laminated assembly jig according to this embodiment.
The laminated member A, for example, the bus bar 26 or the insulating material 27 shown in FIG. 3 is mounted on the lower side 17 of the pressure jig shown in FIG. 17 can be fastened and fixed in such a state that accuracy is obtained by overlapping positioning pins 17a and the like.

  Since the embodiment of the present invention has such a configuration, conventionally, when a circuit was manufactured by stacking bus bars, it had to be manufactured by a dedicated bus bar stacking machine, as shown in FIG. In addition, by installing the laminated pressure assembly jig on a general press machine, there are no restrictions on design, circuit integration, power converter downsizing, and without using a dedicated bus bar lamination machine A laminated bus bar circuit can be manufactured. In addition, the conventional bus bar laminating machine is expensive and takes up a large installation space, so it is difficult to increase the assembly line. However, it can be increased by downsizing.

  The present invention performs optimum pressure lamination of a laminated bus bar by raising the temperature of a pressure jig while applying a current to a thermoelectric element when an insulating material is sandwiched between metal plates to laminate the bus bar. As a means to solve the problems of the manufacturing method of the bus bar that can be easily and accurately joined using a small and space-saving equipment without using a large-scale bus bar laminating machine equipment. Useful.

It is a front view of the bus-bar laminating machine which shows 1st Example of this invention. It is a side view of the bus-bar laminating machine which shows 1st Example of this invention. It is a perspective view of the lamination | stacking bus-bar circuit board by a present Example. It is a perspective view of the lamination assembly jig by a present Example. It is a front view of the conventional bus bar laminating machine. It is the perspective view which saw through the internal bus-bar laminated circuit board used for a general power converter device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Busbar laminating machine 11 Load generating means 12 Support bar 13 Upper rigid weight body 14 Upper insulating plate 15 Upper thermoelectric element 16 Upper pressure jig 17 Lower pressure jig 18 Lower thermoelectric element 19 Lower insulating plate 20 Lower rigid weight body 21 Indicator 22 Display setter 23 Thermoelectric element cable 24 Control device box 25 Bus bar circuit board 26 Bus bar 27 Insulating board 28 Connection terminal 29 Connection terminal hole 30 Bus bar laminating machine 31 Pressurizing means 32 Rigid weight 33 Upper heater block 34 Lower heater block 35 Upper assembly jig 36 Lower assembly jig 37 Power converter 38 Fuse 39 Main circuit capacitor 40 Transistor 41 Bus bar circuit board

Claims (7)

In a laminated bus bar circuit board manufacturing apparatus for producing a laminated bus bar circuit board that connects electronic components using a bus bar laminated member (A) in which a metal plate and an insulating material are laminated and laminated,
A lower pressure jig (17) to which the bus bar laminated member (A) is fixed, a lower rigid weight body (20) provided vertically below the lower pressure jig (17), and the lower pressure jig (17 ) And the lower rigid weight body (20), and the lower thermoelectric element for firmly bonding the metal and the insulating material by dissolving the adhesive applied or adhered to the laminated member by heat. A first pressurizing device having (18) and a lower insulating plate (19) for electrically insulating the lower thermoelectric element (18);
An upper pressure jig (16) arranged vertically above the first pressure device and a gap; an upper rigid weight body (13) provided vertically above the upper pressure jig (16); A metal and an insulating material are disposed between the upper pressure jig (16) and the upper rigid weight body (13), and the adhesive applied or adhered to the laminated member (A) is melted by heat. A second pressurizing device having an upper thermoelectric element (15) for firmly bonding the upper thermoelectric element and an upper insulating plate (14) for electrically insulating the lower thermoelectric element (15);
Two support rods (12) for supporting both ends of the upper rigid weight body (13) and the lower rigid weight body (20) in the vertical direction;
A load generator (11) provided at the upper end of the support rod (12) and applying a load from above toward the upper rigid weight body (13);
An apparatus for manufacturing a laminated bus bar circuit board, comprising: In a laminated bus bar circuit board manufacturing method for manufacturing a laminated bus bar circuit board that connects electronic components using a bus bar laminated member (A) in which a metal plate and an insulating material are laminated and laminated,
The bus bar laminated member (A) is fixed to the lower pressure jig (17), a lower rigid weight body (20) is provided vertically below the lower pressure jig (17), and the lower pressure jig (17). And a lower thermoelectric element (18) and a lower insulating plate (19) between the lower rigid weight body (20) and a first pressurizing device.
An upper pressure jig (16) is fixed vertically above the first pressure device and a gap, and an upper rigid weight body (13) is provided vertically above the upper pressure jig (16). A second pressurizing device comprising an upper thermoelectric element (15) and an upper insulating plate (14) disposed between the pressurizing jig (16) and the upper rigid weight body (13);
Both ends of the upper rigid weight body (13) and the lower rigid weight body (20) are supported by two support rods (12) in the vertical direction, respectively.
A load generator (11) is provided at the upper end of the support rod (12),
Lamination and fixing while applying pressure to the upper pressure jig (16) by using the load generator (11) toward the bus bar laminated member (A) fixed to the lower pressure jig (17). And
The upper thermoelectric element (15) and the lower thermoelectric element (18) dissolve the adhesive applied or adhered to the laminated member (A) by heat, and the metal and the insulating material constituting the laminated member (A) A method of manufacturing a laminated bus bar circuit board, wherein the board is firmly bonded.   The laminated member while changing the temperature of the upper pressurizing jig (16) and the lower pressurizing jig (17) by passing a current through the upper thermoelectric element (15) and the lower thermoelectric element (18). 3. The method of manufacturing a laminated bus bar circuit board according to claim 2, wherein (A) is optimally pressure laminated.   The surface temperature of the upper pressurizing jig (16) and the lower pressurizing jig (17) generated by varying the current of the upper thermoelectric element (15) and the lower thermoelectric element (18) is monitored and displayed. The manufacturing method of the laminated bus-bar circuit board of Claim 2 or 3 characterized by the above-mentioned.   3. The method of manufacturing a laminated bus bar circuit board according to claim 2, wherein a surface of the metal plate is plated with a conductive metal.   A bus bar manufactured by the method for manufacturing a laminated bus bar circuit board according to any one of claims 2 to 5. A power conversion device comprising the bus bar according to claim 6.
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