JP2013225457A - Attachment structure of flexible printed wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure of a flexible printed wiring board which prevents the damage of the flexible printed wiring board during the attachment.SOLUTION: An attachment structure 1 of a flexible printed wiring board includes: an electrode terminal 2 where a screw groove 2A is formed on an outer peripheral surface; a first member 3A and a second member 3B which respectively have insertion parts for inserting the electrode terminal; a nut 4 threadedly engaged with the screw groove; and a flexible printed wiring board 5 sandwiched between the first member and the second member. One of the first member and the second member is conductive. Thus, the flexible printed wiring board is sandwiched between the first member and the second member thereby being electrically connected with the electrode terminal through the one of the first member and the second member.

Description

  The present invention relates to a flexible printed wiring board mounting structure. More specifically, the present invention relates to a flexible printed wiring board mounting structure that can prevent damage to the flexible printed wiring board during mounting.

Conventionally, it is known to attach a bus bar to an electrode terminal of a power supply device. As this mounting structure, the following structures are known. That is, a thread groove is formed on the outer peripheral surface of the electrode terminal, and the electrode terminal is inserted into a hole formed in the bus bar. Then, a nut is screwed into the protruding portion of the electrode terminal protruding from the hole, and the bus bar is fastened to the electrode terminal.
And when fastening a bus-bar to an electrode terminal, a flexible printed wiring board is also attached simultaneously and an electrode terminal and a flexible printed wiring board are electrically connected (for example, refer patent document 1).

JP 2003-45409 A

In Patent Document 1, the electrode terminal is specifically composed of a small-diameter screw portion in which a screw groove is formed, and a pedestal portion positioned below the screw portion and having a larger diameter than the screw portion. The flexible printed wiring board is sandwiched and attached between the bus bar and the pedestal portion.
However, in this case, when the nut is screwed at the time of mounting, there is a possibility that stress due to fastening is concentrated on the flexible printed wiring board and damaged.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a flexible printed wiring board mounting structure that can prevent damage to the flexible printed wiring board during mounting.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that an electrode terminal having a thread groove formed on an outer peripheral surface, a first member having an insertion portion for inserting the electrode terminal, and the electrode A second member having an insertion portion for inserting a terminal, a nut screwed into the screw groove, and a flexible printed wiring board sandwiched between the first member and the second member, Either one of the first member and the second member is conductive, and the flexible printed wiring board is sandwiched between the first member and the second member, whereby the first member And it makes it a summary to be electrically connected to the electrode terminal via either one of the second member.

  According to a second aspect of the present invention, in the first aspect, the electrode terminals of two adjacent unit cells constituting the assembled battery are electrically connected to each other by any one of the first member and the second member. The gist is that it is connected to.

  The gist of a third aspect of the present invention is that, in the second aspect, the flexible printed wiring board includes a voltage detection circuit for detecting a voltage.

The flexible printed wiring board mounting structure of the present invention includes an electrode terminal having a screw groove formed on the outer peripheral surface, a first member and a second member each having an insertion portion for inserting the electrode terminal, and a screw thread in the screw groove. And a flexible printed wiring board sandwiched between the first member and the second member. One of the first member and the second member is conductive. The flexible printed wiring board is electrically connected to the electrode terminal via either the first member or the second member by being sandwiched between the first member and the second member. Yes. With such a configuration, when the nut is screwed in the mounting, both surfaces of the flexible printed wiring board are protected by the first member and the second member, and the damage is prevented.
Moreover, when the electrode terminals of two adjacent unit cells constituting the assembled battery are electrically connected to each other by either one of the first member and the second member, the two adjacent unit cells 10 are connected. The electrical connection between each other and the electrical connection between the flexible printed wiring board and the electrode terminal can be performed simultaneously.
Furthermore, when the voltage detection circuit for detecting a voltage is built in the flexible printed wiring board, the voltage for every single battery which comprises an assembled battery can be detected easily. Moreover, since the process of electrically connecting a flexible printed wiring board and a voltage detection circuit is not required, the assembly process can be simplified.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is a perspective view which shows the attachment structure of the flexible printed wiring board which concerns on an Example. It is the sectional view on the AA line of FIG. It is a disassembled perspective view which shows the attachment structure of the flexible printed wiring board which concerns on an Example. It is a perspective view which shows the bus-bar which concerns on an Example. It is a perspective view which shows the flexible printed wiring board which concerns on an Example. It is a figure for demonstrating the attachment structure of the flexible printed wiring board which concerns on other embodiment. It is a figure for demonstrating the attachment structure of the flexible printed wiring board which concerns on other embodiment. It is a figure for demonstrating the attachment structure of the flexible printed wiring board which concerns on other embodiment. It is a figure for demonstrating the attachment structure of the flexible printed wiring board which concerns on other embodiment.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

  The flexible printed wiring board mounting structure (1) according to this embodiment includes an electrode terminal (2) having a thread groove (2A) formed on the outer peripheral surface, and an insertion portion (31A) for inserting the electrode terminal. A first member (3A), a second member (3B) having an insertion portion (31B) for inserting an electrode terminal, a nut (4) screwed into a thread groove, a first member and a second member And a flexible printed wiring board (5) sandwiched therebetween. One of the first member and the second member is conductive. The flexible printed wiring board is electrically connected to the electrode terminal via either the first member or the second member by being sandwiched between the first member and the second member. (See, for example, FIGS. 1, 2, and 4).

The size, shape, number, etc. of the electrode terminals are not particularly limited. As this electrode terminal, it can be an electrode terminal of various electric and electronic devices, such as power supply devices, such as a battery, an electrolytic capacitor, and a motor, for example.
The size and shape of the first member and the second member are not particularly limited. The material of one of the first member and the second member can be, for example, a highly conductive metal such as copper or aluminum, or an alloy thereof. In this case, the material of the other member is not particularly limited, and may be a conductive material such as a metal or an alloy similar to the above, or may be a non-conductive material such as a resin. Further, the first member and the second member may have substantially the same shape and size, or may have different shapes and sizes. The first member and the second member can be, for example, a bus bar.

The said 1st member and the 2nd member can have a convex part (32A, 32B), for example (for example, refer FIGS. 7-9 etc.). This is because, by sandwiching the flexible printed wiring board at the convex portion, the contact pressure with the flexible printed wiring board can be ensured and can be reliably sandwiched. The size, shape, number, etc. of the convex portions are not particularly limited. This convex part may be provided only in any one of the 1st member and the 2nd member, and may be provided in both.
As said insertion part, it can be notches, such as through-holes, such as a round hole (for example, refer FIG. 4 etc.) and a square hole, a substantially U shape, a substantially V shape.
The size, shape, material, number, etc. of the nut are not particularly limited.

The size and shape of the flexible printed wiring board are not particularly limited. The flexible printed wiring board is flexible. The configuration of the flexible printed wiring board is not particularly limited. For example, the flexible printed wiring board can have a wiring pattern (51) made of a conductive material such as copper (see, for example, FIG. 5). In this case, the flexible printed wiring board can include an insulating layer (52) formed on one or both surfaces of the wiring pattern (for example, referring to FIG. 5, in the sandwiched portion (5A)) The insulating layer (52) is formed on one surface (lower surface), and in the other portions, the insulating layer (52) is formed on both surfaces). The insulating layer can be made of a nonconductive material such as polyimide, for example.
In addition, the flexible printed wiring board can include, for example, a sandwiched portion (5A) that is sandwiched between the first member and the second member (see, for example, FIG. 5).

The flexible printed wiring board mounting structure according to the present embodiment includes, for example, the above-described two unit cells (10) that constitute the assembled battery (100) by either one of the first member and the second member. The electrode terminals can be electrically connected (see, for example, FIGS. 1 and 2).
There are no particular limitations on the type and configuration of the unit cell, and known cells can be used. For example, specifically, a secondary battery such as a lithium ion secondary battery, a nickel hydride secondary battery, and a nickel cadmium secondary battery, or a primary battery can be used. A cell is usually provided with a pair of positive and negative electrode terminals (see, for example, FIG. 3).

  The assembled battery is usually configured by arranging a plurality of the unit cells. The number of cells to be arranged is not particularly limited. When an assembled battery is constituted by a plurality of unit cells, the unit cells can be aligned in the opposite directions so that the positive and negative electrodes of adjacent unit cells are adjacent to each other (for example, FIG. 3). Etc.). In this case, the first member and the second member electrically connect the positive electrode of one unit cell and the negative electrode of the other unit cell in two adjacent unit cells. And in the whole assembled battery, it is set as the state by which the several cell is electrically connected in series. Moreover, it is possible to align the unit cells in the same direction so that the positive electrodes or the negative electrodes of the adjacent unit cells are adjacent to each other. In this case, either one of the first member and the second member electrically connects the positive electrodes or the negative electrodes of the adjacent unit cells in the two adjacent unit cells. And in the whole assembled battery, it is set as the state by which the several cell is electrically connected in parallel.

  The flexible printed wiring board mounting structure according to the present embodiment can be, for example, a form in which a voltage detection circuit (53) for detecting a voltage is incorporated in the flexible printed wiring board (for example, FIG. 6). Etc.). The circuit configuration of the voltage detection circuit is not particularly limited. The voltage detection circuit can be configured to detect, for example, the voltage of each single battery or the voltage of the entire assembled battery.

Hereinafter, the present invention will be specifically described with reference to the drawings. In addition, in a present Example, the attachment structure of the flexible printed wiring board attached to the assembled battery mounted in an electric vehicle, a hybrid vehicle, etc. is illustrated.
(1) Configuration of Flexible Printed Wiring Board Mounting Structure As shown in FIGS. 1 to 3, the flexible printed wiring board mounting structure 1 according to this embodiment includes an electrode terminal 2 and a pair of bus bars 3A and 3B (this And the nut 4 and the flexible printed wiring board 5 are illustrated.
The electrode terminal 2 is an electrode terminal of the unit cell 10 constituting the assembled battery 100. As shown in FIGS. 2 and 3, the electrode terminal 2 is formed in a substantially round bar shape protruding from the base 10 </ b> A of the unit cell 10, and a thread groove 2 </ b> A is formed on the outer peripheral surface thereof. A nut 4 is screwed into the thread groove 2A. As shown in FIG. 3, in this embodiment, the electrode terminals 2 are electrode terminals provided on one end side and the other end side of the upper surface of the unit cell 10. One of these electrode terminals 2 is a positive electrode and the other is a negative electrode. The unit cell 10 forms an assembled battery 100 in which positive and negative electrode terminals 2 are alternately arranged in opposite directions.

  As shown in FIG. 4, the bus bars 3 </ b> A and 3 </ b> B are formed by forming through holes 31 </ b> A and 31 </ b> B (illustrated as insertion portions according to the present invention) in a flat copper plate. In this embodiment, the bus bar 3A and the bus bar 3B have substantially the same shape and size. The bus bars 3A and 3B are fastened to the electrode terminals 2 by screwing the nuts 4 with the electrode terminals 2 inserted into the through holes 31A and 31B. Since the bus bars 3A and 3B are attached in this manner, the electrode terminals 2 of the adjacent unit cells 10 are electrically connected. As shown in FIG. 1, in this embodiment, six unit cells 10 constituting the assembled battery 100 are provided. These six unit cells 10 are electrically connected in series by five sets of bus bars 3A and 3B. The flexible printed wiring board mounting structure 1 according to this embodiment includes a housing 6 for insulation as shown in FIGS. The bus bars 3 </ b> A and 3 </ b> B are fastened to the electrode terminal 2 while being accommodated in the housing 6.

As shown in FIGS. 1 and 2, the flexible printed wiring board 5 is attached by being sandwiched between a pair of bus bars 3A and 3B. Thereby, the flexible printed wiring board 5 is electrically connected to the electrode terminal 2 via the bus bars 3A and 3B.
As shown in FIG. 5, the flexible printed wiring board 5 includes a wiring pattern 51 made of copper and an insulating layer 52 made of polyimide formed on both surfaces of the wiring pattern 51. Further, the flexible printed wiring board 5 has a sandwiched portion 5A, and the sandwiched portion 5A is sandwiched between the bus bars 3A and 3B. As shown in FIGS. 1 and 2, the sandwiched portion 5A is sandwiched at a position between the two through holes 31A and 31B of the bus bars 3A and 3B. One end of the wiring pattern 51 extends to the sandwiched portion 5A. One side of the wiring pattern 51 in the sandwiched portion 5A is exposed. The exposed portion of the wiring pattern 51 is in contact with the bus bars 3A and 3B, whereby the flexible printed wiring board 5 and the bus bars 3A and 3B are electrically connected.

  Note that the other end of the wiring pattern 51 extends to the connection portion 5B, and is connected to a vehicle ECU (not shown) provided separately from the flexible printed wiring board 5. In this ECU, voltage detection of each cell 10 is performed.

(2) Effect of flexible printed wiring board mounting structure According to the flexible printed wiring board mounting structure 1 of the present embodiment, the electrode terminal 2 having a thread groove formed on the outer peripheral surface, and the electrode terminal 2 are inserted. A pair of bus bars 3A and 3B having through holes 31A and 31B, a nut 4 screwed into a screw groove, and a flexible printed wiring board 5 sandwiched between the pair of bus bars 3A and 3B are provided. And the flexible printed wiring board 5 is electrically connected with the electrode terminal 2 via bus-bar 3A, 3B by being pinched | interposed into a pair of bus-bar 3A, 3B. As described above, since the flexible printed wiring board 5 is sandwiched between the two bus bars 3A and 3B, both sides of the flexible printed wiring board 5 are held by the bus bars 3A and 3B when the nut 4 is screwed together during mounting. It is protected and its damage is prevented.

  Further, in this embodiment, the electrode terminals 2 of two adjacent unit cells 10 constituting the assembled battery 100 are electrically connected by the bus bars 3A and 3B, so that the two adjacent unit cells 10 can be connected to each other. Electrical connection and electrical connection between the flexible printed wiring board and the electrode terminal can be performed simultaneously. Moreover, compared with the case where it connects by one bus bar like the past, while being able to make the electrical connection of the two adjacent unit cells 10 reliable, physical connection is also reliable. .

  Furthermore, in the present embodiment, the pair of bus bars 3A and 3B have substantially the same shape and size, so the number of types of parts can be reduced as compared with the case where the pair of bus bars have different shapes and sizes. , Can reduce the cost. Further, since the two bus bars 3A and 3B can be assembled in any order, the efficiency of the assembling work can be improved.

  In addition, in this invention, it can be set as the Example variously changed within the range of this invention according to the objective and a use, without being restricted to said each Example. That is, in the above-described embodiment, the voltage of each cell 10 is detected by an ECU provided separately from the flexible printed wiring board 5, but the present invention is not limited to this. For example, as shown in FIG. A voltage detection circuit 53 for detecting the voltage may be incorporated in the flexible printed wiring board 5.

  Moreover, in the said Example, although a pair of bus bar 3A, 3B each having electroconductivity was illustrated as a 1st member and a 2nd member, it is not limited to this, For example, only one member is a bus bar etc. It is good also as a conductive member.

  Moreover, in the said Example, although the to-be-clamped part 5A was inserted | pinched in the position between two through-hole 31A, 31B of bus-bar 3A, 3B, it is not limited to this, In which position of bus-bar 3A, 3B It may be pinched. For example, the sandwiched portion 5A may be sandwiched at a position where the through holes 31A and 31B of the bus bars 3A and 3B are formed.

  Furthermore, in the said Example, although bus-bar 3A, 3B was made into flat form, it is not limited to this, For example, as shown in FIGS. 7-9, you may make it form convex part 32A, 32B in a bus-bar. Good. In this case, as shown in FIG. 7, the contact between the flexible printed wiring board 5 and the bus bars 3A and 3B is secured by sandwiching the flexible printed wiring board 5 at the convex portions 32A and 32B, and the flexible printed wiring board is attached to the bus bar. It can be held securely. This convex part may be provided only in any one of a pair of bus bars, and may be provided in both.

  Further, when forming a convex portion on the bus bar, an alignment portion 5C for aligning the flexible printed wiring board 5 by engaging with the convex portions 32A and 32B in the sandwiched portion 5A may be formed. Good. As shown in FIG. 8, the alignment portion 5C can be a through hole that engages with the convex portion 32B, or can be a recess that engages with the convex portion 32B as shown in FIG. Further, the alignment portion may be a cutout having a substantially U-shaped or V-shaped planar shape. Furthermore, the flexible printed wiring board 5 can be aligned by aligning the alignment portion 5C with the electrode terminal 2.

  The foregoing examples are for illustrative purposes only and are not to be construed as limiting the invention. Although the invention has been described with reference to exemplary embodiments, it is to be understood that the language used in the description and illustration of the invention is illustrative and exemplary rather than limiting. As detailed herein, changes may be made in its form within the scope of the appended claims without departing from the scope or spirit of the invention. Although specific structures, materials and examples have been referred to in the detailed description of the invention herein, it is not intended to limit the invention to the disclosure herein, but rather, the invention is claimed. It covers all functionally equivalent structures, methods and uses within the scope.

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  Widely used as a technology for attaching flexible printed wiring boards. In particular, it is suitably used as a technique for electrically connecting electrode terminals of various electric and electronic devices such as power supply devices such as batteries, electrolytic capacitors, and motors to flexible printed wiring boards.

  DESCRIPTION OF SYMBOLS 1; Mounting structure of flexible printed wiring board, 2; Electrode terminal, 2A; Screw groove, 3A, 3B; Bus bar (1st member, 2nd member), 31A, 31B; Through-hole (insertion part), 32A, 32B; Convex part, 4; Nut, 5; Flexible printed wiring board, 5A; Clamped part, 5B; Connection part, 5C; Positioning part, 51; Wiring pattern, 52; Insulating layer, 53; Voltage detection circuit, 6; 10; single battery, 10A; pedestal, 100; assembled battery.

Claims (3)

An electrode terminal having a thread groove formed on the outer peripheral surface;
A first member having an insertion portion for inserting the electrode terminal;
A second member having an insertion portion for inserting the electrode terminal;
A nut screwed into the thread groove;
A flexible printed wiring board sandwiched between the first member and the second member,
One of the first member and the second member is conductive,
The flexible printed wiring board is electrically sandwiched between the first member and the second member, thereby electrically connecting the electrode terminal and the electrode terminal via one of the first member and the second member. A flexible printed wiring board mounting structure, characterized in that the flexible printed wiring board is connected.   The flexible printed wiring according to claim 1, wherein the electrode terminals of two adjacent unit cells constituting the assembled battery are electrically connected to each other by any one of the first member and the second member. Board mounting structure.   The flexible printed wiring board mounting structure according to claim 2, wherein a voltage detection circuit for detecting a voltage is incorporated in the flexible printed wiring board.

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