JP2018026219A - Connector for substrate and battery control device including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for a substrate, capable of reliably preventing a conductive foreign matter from adhering to a lead that connects between a component mounting substrate and the connector for a substrate, and a battery control device including the same.SOLUTION: A battery control device 1 includes: a component mounting substrate 3; a connector 4 for a substrate, which is mounted on the component mounting substrate, and which has one side where a plurality of leads 6 connected to the component mounting substrate are arranged and the other side where a plurality of connector terminals 7 connected to external equipment are arranged; and a protective cap 8 covering the plurality of leads between the back face of the connector for a substrate and the front face of the component mounting substrate. The battery control device further includes a sealing member 10 closing a gap between the bottom face of the connector for a substrate and the front face of the component mounting substrate.SELECTED DRAWING: Figure 5

Description

  The present invention relates to the structure of a battery control device.

  Secondary devices such as lithium ion battery cells are used in power supply devices such as hybrid vehicles and electric vehicles. Here, since the output voltage per battery cell is as low as about several volts, a power storage module that can output several tens of volts to several hundreds volts by connecting battery cells in multiple stages is used as a power supply device.

  This power storage module is used while repeatedly charging and discharging each battery cell. However, when a voltage difference occurs in the output voltage of each battery cell, battery deterioration is promoted. Therefore, the output voltage of each battery cell is individually monitored using the battery control device so that the output voltage of each battery cell becomes uniform, and charging / discharging of each battery cell is controlled.

  The battery control device is usually connected to the power storage module via a cable having several tens of wires so that the output voltages of a large number of battery cells can be individually measured. Therefore, a large number of leads are densely arranged at a short pitch between the board connector of the battery control device and the component mounting board. Thus, when the pitch between the leads is shortened, there is a possibility that the leads are short-circuited when conductive foreign matter adheres to the leads. When the lead is short-circuited, there is a risk that the battery cell generates heat due to a short circuit between the (+) electrode and the (-) electrode of the battery cell electrically connected to the lead 6. For example, Patent Documents 1 and 2 disclose dust-proof methods for preventing conductive foreign matters from adhering to leads.

  In Patent Document 1, “a dam member 62 is arranged around a connector 48 attached to a circuit board 83. The dam member 62 has an opening substantially perpendicular to the arrangement direction of the inner and outer connection terminals 54 and 55. Part 63 and opening / closing parts 64a and 64b that open and shield the opening part 63. After potting from the opening part 63, the opening / closing parts 64a and 64b are closed and viewed from a direction perpendicular to the mounting surface of the connector 48 of the circuit board 83. Potting is performed. By potting from two directions, the terminals are reliably insulated by the insulating resin 72 ”(see summary).

  On the other hand, Patent Document 2 states that “a housing body 1 in which terminals are disposed inside, a cover part 2 detachably attached to the housing body 1, and a hinge 3 that connects the housing body 1 and the cover part 2 are made of resin. The cover part 2 can be easily soldered from the substrate surface side by retracting the cover part 2 above the housing body 1. Further, after the soldering, the cover part 2 is used for engagement. The protrusion 2a is engaged with the engaging portion 1b of the housing main body 1 to fix the cover portion 2 to the housing main body 1, whereby the insulation treatment of the lead 4 is completed "(see summary).

JP 2012-54025 A Japanese Utility Model Publication No. 6-44041

  However, the dust-proof method of Patent Document 1 requires equipment for potting the molten insulating resin and requires time for the insulating resin to cure.

  On the other hand, the dust-proof method of Patent Document 2 is a simple method that does not require special equipment. However, since a gap is formed between the cover portion and the substrate surface, for example, a thin fibrous shape having a diameter of 1 mm or less. It is impossible to completely prevent foreign matter from entering.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a circuit board that can reliably prevent conductive foreign matter from adhering to leads connecting the board connector and the component mounting board. A connector and a battery control device including the connector are provided.

  In order to solve the above problems, the present invention provides a component mounting board and a plurality of leads that are attached to the component mounting board and connected to the component mounting board on one side, and an external device on the other side. A battery control device comprising: a board connector in which a plurality of connector terminals connected to the board are arranged; and a protective cap that covers the plurality of leads between the back surface of the board connector and the surface of the component mounting board. And a sealing member that closes a gap between the bottom surface of the board connector and the surface of the component mounting board.

  According to the present invention, by covering the lead connecting the board connector and the component mounting board with the protective cap, it is possible to prevent the conductive foreign matter mixed in the case in which the component mounting board is contained from adhering to the lead. it can.

  In addition, by closing the gap between the bottom surface of the board connector and the component mounting board with a sealing member, it is possible to prevent conductive foreign matter from entering the case in which the component mounting board is accommodated from the gap.

  As a result, it is possible to reliably prevent the conductive foreign matter from adhering to the leads connecting the board connector and the component mounting board.

It is the perspective view which looked at the battery control board which concerns on one Embodiment of this invention from the connector front end side. It is the perspective view seen from the connector front end side in the state which accommodated the battery control board which concerns on one Embodiment of this invention in the case. It is the perspective view which looked at the connector attachment part of the conventional battery control board from the connector back side. It is sectional drawing of the connector attachment part of the conventional battery control board. It is sectional drawing of the connector attachment part of the battery control board which concerns on one Embodiment of this invention. It is the disassembled perspective view which looked at the connector attachment part of the battery control board which concerns on one Embodiment of this invention from the connector back side. It is the perspective view which looked at the connector attachment part of the battery control board which concerns on one Embodiment of this invention from the connector back side.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same member and the overlapping description is abbreviate | omitted suitably.

  FIG. 1 is a perspective view of the battery control board according to the present embodiment as viewed from the connector front side, and FIG. 2 is a perspective view of the battery control device shown in FIG. It is.

  The battery control device 1 according to the present embodiment is a device that controls a battery unit that is a power storage module as a drive power source for a hybrid vehicle or an electric vehicle.

  The battery unit is configured by combining a large number of battery cells in multiple stages in order to ensure an output voltage. In the battery unit, when a difference occurs in the output voltage of each battery cell, battery deterioration is promoted. Therefore, the battery control device 1 individually monitors the output voltage of each battery cell and controls charging / discharging of each battery cell so that the output voltage of each battery cell becomes uniform.

  As shown in FIG. 1, the battery control device 1 is fitted on a component mounting board 3 on which a large number of electronic components 2 are mounted, and a cable connector attached on the component mounting board 3 and led out from the battery unit. Board connector 4.

  As shown in FIG. 2, the battery control device 1 is mounted on a hybrid vehicle or an electric vehicle while being accommodated in the case 5, and is connected to the battery unit via the board connector 4.

  The side surface of the case 5 is provided with an opening 5 a that exposes the opening 4 a of the board connector 4 to the outside so that the battery unit cable can be connected to the component mounting board 3.

  The inner dimension of the opening 5 a is set to be larger than the outer dimension of the board connector 4 in order to absorb a dimensional error at the time of manufacturing the case 5. For this reason, a gap is generated between the inner side surface of the opening 5a and the outer side surface of the board connector 4, and there is a possibility that conductive foreign matters are mixed from the gap.

  FIG. 3 is a perspective view of a connector mounting portion of a conventional electronic control device as viewed from the back side of the connector, and FIG. 4 is a cross-sectional view of the connector mounting portion of the electronic control device 1X shown in FIG.

  As shown in FIG. 4, the board connector 4 is fixed to the component mounting board 3 by engaging an integrally formed engagement claw 4 b with an engagement hole 3 a provided in the component mounting board 3.

  The plurality of connector terminals 7 are integrally formed with the plurality of leads 6, respectively. The plurality of leads 6 are led out from the back surface of the board connector 4 to the outside in parallel with the board surface, and are bent at substantially right angles toward the board surface in the middle. The leading ends of the leads 6 are bent in parallel to the board surface immediately before reaching the board surface, and are electrically connected to the pattern wiring provided on the component mounting board 3 by solder.

  The battery control device 1 is normally connected to the power storage module via a cable having several tens of wires so that the voltages of a large number of battery cells constituting the battery unit can be individually measured. Therefore, a large number of connector terminals 7 are densely arranged at a short pitch in the opening 4a of the board connector 4. Similarly, a large number of leads 6 are densely arranged at a short pitch between the board connector 4 and the component mounting board 3.

  The plurality of leads 6 and the plurality of connector terminals 7 of the board connector 4 are electrically connected to the electrodes of the battery cells of the battery unit via cables. Therefore, conductive foreign matter enters the case 5 through a gap between the inner surface of the opening 5 a of the case 5 and the outer surface of the board connector 4, and adheres to the leads 6 exposed from the back surface of the board connector 4. When the lead is short-circuited, the battery cell electrically connected to the lead 6 may be short-circuited with the (+) electrode and the (-) electrode, and the battery cell may generate heat.

  5 is a cross-sectional view of the connector mounting portion of the battery control device 1 according to the present embodiment, and FIG. 6 is an exploded perspective view of the connector mounting portion of the battery control device 1 as viewed from the back side of the connector. These are the perspective views which looked at the connector attachment part of the battery control apparatus 1 from the connector back side.

  As shown in FIGS. 5 to 7, the plurality of leads 6 exposed from the back surface of the board connector 4 are covered with a box-shaped protective cap 8 whose front surface and bottom surface are open.

  As shown in FIG. 5, the front end portion of the upper surface of the protective cap 8 and the front end portions of both side surfaces are provided on a step portion 4 c formed on the back surface of the board connector 4 via an adhesive member 9 such as a double-sided tape. It is fixed. The lower end portions of the protective cap 8 (the lower end portions on both sides and the back portion 8a) are arranged on the upper surface of the sealing member 10 described later. Thereby, a sealed space is formed around the plurality of leads 6.

  As shown in FIGS. 5 and 6, a sealing member 10 is provided between the bottom surface of the board connector 4 and the lower end of the protective cap 8 and the surface of the component mounting board 3. The sealing member 10 is a sheet-like or film-like elastic member, and is preferably made of a material such as heat-resistant silicone rubber so that it can be easily processed according to the shape of the bottom surface of the board connector 4. The sealing member 10 has adhesiveness on the lower surface thereof, and is attached to the surface of the component mounting board 3 before the board connector 4 is attached.

  The sealing member 10 includes an opening 10 a for passing the engagement claw 4 b of the board connector 4 through the engagement hole 3 a of the component mounting board 3, and a plurality of leads 6 of the board connector 4. An opening 10b for soldering to the pattern is formed.

  By placing the board connector 4 on the sealing member 10 and engaging the engaging claws 4b with the engaging holes 3a of the component mounting board 3, the sealing member 10 is pressed from both the upper and lower surfaces. Thereby, the sealing member 10, the board connector 4 and the component mounting board 3 can be brought into close contact with each other, and the gap between the bottom surface of the board connector 4 and the component mounting board 3 can be closed.

  According to the present invention, by covering the plurality of leads 6 connecting the board connector 4 and the component mounting board 3 with the protective cap 8, conductive foreign matter mixed in the case 5 in which the component mounting board 3 is accommodated. Can be prevented from adhering to the lead 6.

  Further, by closing the gap between the bottom surface of the board connector 4 and the component mounting board 3 with the sealing member 10, it is possible to prevent conductive foreign matter from entering the case in which the component mounting board is accommodated from the gap.

  Thus, it is possible to reliably prevent the conductive foreign matter from adhering to the leads 6 connecting the board connector 4 and the component mounting board 3.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to above-described embodiment, The various modifications as shown below are considered.

  In the present embodiment, the adhesiveness is given only to the lower surface of the sealing member 10, but the present invention is not limited to this, and the upper surface of the sealing member 10 may also be adhesive. As a result, the protective cap 8 can be fixed to the sealing member 10 as well.

  In the present embodiment, the protective cap 8 is fixed to the board connector 4 via the adhesive member 9, but the present invention is not limited to this, and the claw provided at the front end of the protective cap 8 is used as the board connector 4. It may be fixed by fitting into a groove provided at the rear end (or by fitting a claw provided at the rear end of the board connector 4 into a groove provided at the front end of the protective cap 8). Or you may fix to the component mounting board 3 directly by engaging the nail | claw provided in the lower end part of the protective cap 8 with the engagement hole provided in the component mounting board 3. FIG.

  In the present embodiment, the height of the protective cap 8 matches that of the board connector 4, and the front end of the protective cap 8 is fixed to the stepped portion 4c provided on the back surface of the board connector 4. The invention is not limited to this, and the inner dimension of the protective cap 8 may be substantially matched with the outer dimension of the board connector 4 and may be covered and fixed on the upper surface and both side faces of the board connector 4. Thereby, it is not necessary to provide the step part 4c on the back surface of the board connector 4, and the protective cap 8 can be attached to the existing board connector 4 (shown in FIG. 3).

  In the present embodiment, the board connector 4 is attached after the sealing member 10 is attached to the component mounting board 3. However, the present invention is not limited to this, and the sealing member 10 is integrally formed on the bottom surface of the board connector 4. You may do it. Thereby, since the operation | work which sticks the sealing member 10 to the component mounting board | substrate 3 becomes unnecessary, it becomes possible to reduce the assembly man-hour of the battery control apparatus 1. FIG.

  DESCRIPTION OF SYMBOLS 1,1X ... Battery control apparatus, 2 ... Electronic component, 3 ... Component mounting board, 3a ... Engagement hole, 4 ... Board connector, 4a ... Frontage part, 4b ... Engagement claw, 4c ... Step part, 5 ... Case 5a ... opening, 6 ... lead, 7 ... connector terminal, 8 ... protective cap, 8a ... bellows, 9 ... adhesive member, 10 ... sealing member, 10a, 10b ... opening.

Claims (4)

Component mounting board,
A board connector in which a plurality of leads connected to the component mounting board are arranged on one side and a plurality of connector terminals connected to an external device are arranged on the other side, mounted on the component mounting board,
In the battery control device comprising a protective cap that covers the plurality of leads between the back surface of the board connector and the surface of the component mounting board,
The battery control device further comprising a sealing member that closes a gap between the bottom surface of the board connector and the surface of the component mounting board. The battery control board according to claim 1,
The battery control board, wherein the sealing member is formed of an elastic member. A board connector in which a plurality of leads connected to the component mounting board are arranged on one side and a plurality of connector terminals connected to an external device are arranged on the other side are mounted on the component mounting board.
A board connector comprising a sealing member for closing a gap between the bottom surface of the component mounting board and the surface of the component mounting board. The board connector according to claim 3,
The battery control board, wherein the sealing member is formed of an elastic member.

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