JP2012054025A - Component mounting board - Google Patents

Abstract

Insulating resin can be potted from different directions between terminals of components attached to a circuit board.
A dam member is disposed around a connector attached to a circuit board. The weir member 62 includes an opening 63 that is substantially perpendicular to the arrangement direction of the inner and outer connection terminals 54 and 55, and opening / closing portions 64 a and 64 b that open and shield the opening 63. After potting from the opening 63, the open / close portions 64 a and 64 b are closed, and potting is performed from a direction perpendicular to the mounting surface of the connector 48 of the circuit board 83. By potting from two directions, the terminals are reliably insulated by the insulating resin 72.
[Selection] Figure 9

Description

  The present invention relates to a component mounting board, and more particularly, to a component mounting board having an insulating resin that insulates between terminals of the component.

  A power storage device such as a hybrid vehicle or an electric vehicle uses a power storage module configured by combining a number of secondary batteries such as lithium ion battery cells, nickel metal hydride battery cells, and nickel cadmium battery cells. The battery cell mounted on the power storage module has a structure that cools heat generated during charging and discharging with a refrigerant such as air. In order to protect the components constituting the voltage measuring device and the like connected to the battery cell from leakage and electric corrosion, a structure in which the connection terminals of each component are covered with an insulating resin is employed.

  As a component mounting board that covers the connection terminals with insulating resin, a frame-shaped member is provided so as to surround the component soldered to the control circuit board, and the component mounting surface of the circuit board is provided inside the frame-shaped member. A structure in which a molten insulating resin is potted and cured from above is known (see, for example, Patent Document 1). In this case, the frame member serves as a weir that stops the flow of the molten insulating resin.

JP 2002-271002 A

  In the component mounting board described in Patent Document 1, the frame-shaped member is fixed to the circuit board, and when the component is covered with the insulating resin, the direction in which the molten insulating material is potted is perpendicular to the mounting surface of the circuit board. One direction is restricted. For this reason, it was impossible to perform potting from different directions.

The component mounting board of the present invention has a circuit board, connection terminals arranged in a plurality of rows, a terminal multi-row type component in which the connection terminals are mounted on the circuit board, and a terminal multi-row type on the circuit board. A dam member disposed around at least the connection terminal of the component; and an insulating resin provided inside the dam member and potted between the connection terminals arranged in a plurality of rows and between the connection terminal and the circuit board. The dam member includes an opening / closing portion dam member having an opening formed corresponding to the connection terminal and an opening / closing portion that opens and shields the opening.
The component mounting board of the present invention has a circuit board and a plurality of connection terminals, has a first component mounted on the circuit board, and a plurality of connection terminals, and is mounted on the circuit board. The second component, the first dam member disposed around at least the connection terminal of the first component on the circuit board, and the at least the connection terminal of the second component on the circuit board. A second insulating member, a first insulating resin provided in the first dam member and potted between the plurality of connection terminals of the first component, and provided in the second dam member. And a second insulating resin potted between the plurality of connection terminals of the second component, wherein at least one of the first and second dam members opens and shields the opening. It is a weir member with an opening / closing part having an opening / closing part.

  According to this invention, it is possible to pot the molten insulating resin also from the opening of the weir member, and when the connection terminals are arranged in a plurality of rows, or the connection terminals are arranged in different directions. Even in this case, the connection terminals can be reliably insulated with an insulating resin.

The figure which shows one Embodiment of the battery system for vehicles which has the component mounting board | substrate of this invention. The figure which shows the drive system of the rotary electric machine for vehicles by which the battery system for dual uses shown in FIG. 1 was mounted. FIG. 2 is an external perspective view of a battery unit incorporated in the vehicle battery system illustrated in FIG. 1. FIG. 4 is an exploded perspective view of the battery unit illustrated in FIG. 3. FIG. 5 is a perspective view of the cell control device shown in FIG. 4, showing an embodiment of the component mounting board of the present invention. In FIG. 5, the perspective view for demonstrating the method of potting insulation resin. The expansion perspective view which shows one Embodiment of the dam member with an opening-and-closing part mounted in the component mounting board | substrate of this invention. FIG. 6 is an enlarged perspective view of a dam member with a connector and an opening / closing portion illustrated in FIG. 5. The expansion perspective view of the dam member with a connector and an opening-and-closing part illustrated in FIG. The characteristic view which shows the relationship between the withstand voltage between conductors, and a conductor gap.

Hereinafter, a first embodiment of a component mounting board according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of a vehicle battery system having a component mounting board according to the present invention, and FIG. 2 is a drive system for a vehicular rotating electrical machine on which the dual battery system shown in FIG. 1 is mounted. FIG.

  As shown in FIG. 2, the drive system for the vehicular rotating electrical machine includes a battery unit 900 including a battery system, an inverter device 220 that converts DC power from the battery unit 900 into three-phase AC power, and a motor for driving the vehicle. 230, a host controller 110 that controls the battery unit 900 and the inverter device 220 is provided. Motor 230 is driven by the three-phase AC power from inverter device 220.

In the battery unit 900, the battery controller 20, the DC / DC converter built in the converter box 21 and supplying a 12V power to the battery controller 20, the blower fan 17, and the blower fan 17 are unitized as a unit to operate the blower fan 17. the relay 16, the cell controller 80 and the current sensor S _I described above, constitutes a weak electric circuits.

  The DC / DC converter in the converter box 21 is supplied with power from a 24V lead battery (not shown), which is a power source for the hybrid vehicle (operating an auxiliary machine such as a lamp), and this 24V voltage is supplied to the chopper circuit. Then, the voltage is converted to 12V by a smoothing circuit or the like (not shown), and a constant voltage of 12V is supplied as an operating power source for the battery controller 20. The DC / DC converter is connected to the ON terminal of the ignition switch IGN. When the ignition switch IGN is located at the ON position, the DC / DC converter starts operating and continuously supplies power to the battery controller 20 via the shutdown control line. When the battery controller 20 is instructed to stop the power supply, the power supply to the battery controller 20 is stopped. With such a configuration, a highly reliable power supply system is realized.

  Each battery module 9 is configured by connecting a plurality of battery cells in series, and is connected to a cell controller 80 by connectors 48 and 49, respectively. The positive electrode of one battery module 9 is connected to the positive electrode of the inverter device 220 via the positive high voltage cable 81 and the relay RLP. The negative electrode of the other battery module 9 is connected to the negative electrode of the inverter device 220 via the negative high voltage cable 82 and the relay RLN. A series circuit of a resistor RPRE and a precharge relay RLPRE is connected in parallel with the relay RLP. Between the relay RLP and the inverter device 220, a current sensor Si such as a Hall element is inserted. The current sensor Si is built in the junction box, and its output line is led to the battery controller 20.

  For example, a relay RLP or a relay RLN having a rated current of about 80 A can be used, and a precharge relay RLPRE having a rated current of about 10 A can be used. For example, a resistor RPRE having a rated capacity of 60 W and a resistance value of about 50Ω can be used, and a current sensor Si having a rated current of about ± 200 A can be used. The negative high-voltage cable 82 and the positive high-voltage cable 81 described above are connected to the inverter device 220 that drives the motor 230 via the relay RLP, the relay RLN, and the output terminals 810 and 820. With such a configuration, high safety can be maintained.

  The inverter device 220 includes a power module 226, an MCU 222, a driver circuit 224 for driving the power module 226, and a large-capacity smoothing capacitor 228 of about 700 μF to about 2000 μF. The power module 226 converts the DC power supplied from each battery module 9 into three-phase AC power for driving the motor 230.

  The smoothing capacitor 228 can obtain desirable characteristics of the film capacitor than the electrolytic capacitor. The smoothing capacitor 228 mounted on the vehicle is influenced by the environment where the vehicle is placed, and is used in a wide temperature range from a low temperature of minus tens of degrees Celsius to about 100 degrees Celsius. When the temperature drops below zero degree, the electrolytic capacitor suddenly deteriorates in characteristics and the ability to remove voltage noise decreases. For this reason, a large noise may be added to the integrated circuit provided in the cell controller 80. The film capacitor is less susceptible to temperature degradation and voltage noise applied to the integrated circuit can be reduced.

  In accordance with a command from the host controller 110, the MCU 222 changes the negative relay RLN from the open state to the closed state at the start of driving the motor 230, then changes the precharge relay RLPRE from the open state to the closed state, and charges the smoothing capacitor 228. Thereafter, the positive relay RLP is changed from the open state to the closed state, and the supply of power from the battery module 9 of the battery unit 900 to the inverter device 220 is started.

  The inverter device 220 controls the phase of AC power generated by the power module 226 with respect to the rotor of the motor 230, and operates the motor 230 as a generator when braking the hybrid vehicle, that is, performs regenerative braking control. At this time, the electric power generated by the generator operation is regeneratively charged to each battery module 9 to charge each battery module 9. When the charged state of each battery module 9 is lower than the reference state, the inverter device 220 operates using the motor 230 as a generator. The three-phase AC power generated by the motor 230 is converted into DC power by the power module 226 and supplied to each battery module 9. As a result, each battery module 9 is charged.

  The connection line between the negative electrode of the other battery module 9 of the battery unit 900 and the relay RLN on the negative electrode side, and the connection line between the positive electrode of the one battery module 9 and the relay RLP on the positive electrode side include a case ground (vehicle chassis and Capacitors CN and CP are respectively inserted between the same potential). These capacitors CN and CP remove noise generated by the inverter device 220 to prevent malfunction of the weak electric system circuit and destruction due to the surge voltage of the IC constituting the cell controller 80. Although the inverter device 220 has a noise removal filter, these capacitors CN and CP further enhance the effect of preventing malfunction of the battery controller 20 and the cell controller 80, and improve the noise resistance reliability of the battery unit 900. Inserted to further enhance.

  In FIG. 2, the high-power circuit of the battery unit 900 is indicated by a thick line. For these wires, rectangular copper wires having a large cross-sectional area are used. The blower fan 17 is a fan for cooling the battery module 9 and operates via a relay 16 that is turned on by a command from the battery controller 20.

  The vehicle battery system illustrated in FIG. 1 includes a battery module 9, a cell controller 80, and a battery controller 20. The drive system for a rotating electrical machine for a vehicle has a pair (two) of vehicle battery systems including the battery module 9, the cell controller 80, and the battery controller 20 shown in FIG.

  The battery module 9 is configured by connecting a plurality of battery cells 1 such as lithium ion secondary batteries having a maximum voltage of about 4.35V in series. The cell controller 80 includes a circuit board 114 and constitutes a voltage measuring device for the battery cell 1. A connector 48 (49) is attached to one side edge of the circuit board 114. The connector 48 (49) will be described later.

  The positive and negative terminals of each battery cell 1 are connected to a cell controller 80 which is a voltage measuring device via a connector 48 (49) of the cell controller 80. The multiplexer 104 is switched by a command from the battery controller 20, and the voltage of each battery cell 1 detected by the differential amplifier 102 is converted into a digital signal by the A / D converter 105. The converted digital signal is taken into the controller 108 of the battery controller 20 through the pulse transformer 116.

  The battery controller 20 is configured to operate at a low voltage such as 5 volts generated from a 12V system power supply with the chassis potential of the vehicle as ground (GND). On the other hand, the power supply system composed of lithium battery cells is a power supply system that is electrically insulated from the 12V power supply, and the cell controller 80 has a potential difference between the highest potential and the lowest potential of the battery module 9. That is, it operates in response to a voltage. As described above, the power supply system of the battery controller 20 and the power supply system of the cell controller 80 have different potential relationships, and the voltage values are also greatly different. Therefore, by providing an insulation circuit (pulse transformer 116, photocoupler 117, 118) for electrically isolating both controllers in the transmission path connecting the battery controller 20 and the cell controller 80, the reliability can be improved. Plan.

  The controller 108 of the battery controller 20 monitors the current flowing through the wiring connecting the terminal having the maximum potential of the battery module 9 and the external load 120 with the current sensor 112. Further, the controller 108 monitors the temperature of the battery module 9 with the temperature sensor 111. The temperature sensor 111 is provided in close contact with the surface of a case 900a (described later) that houses the battery module 9, and is connected to a temperature detection circuit (not shown) built in the controller 108 via a connection line 123. Yes. The controller 108 calculates and monitors the maximum temperature, the minimum temperature, the average temperature, and the like from the detection value of the temperature sensor 111. For example, a thermistor or the like is used as the temperature sensor 111, but the temperature-resistance characteristic of the thermistor is not simply proportional. The temperature detection circuit applies a measurement voltage to the temperature sensor 111, converts the voltage generated in the temperature sensor 111 into a signal that is simply proportional to the temperature of the battery module 9, and outputs the signal to the host controller 110.

  The battery controller 20 inputs detection values from the current sensor 111, the temperature sensor 112, and a voltage sensor (not shown) at a constant cycle. Here, a voltage sensor detects the total voltage value of the battery cell 1 whole connected in series. When a failure occurs in any of the sensors, the detection values input from each of these sensors are not reliable and cannot be used for monitoring, so diagnosis of whether these sensors are operating correctly I do. If it is determined that there is a failure, the host controller 110 is notified of the information. For example, if the detected value of a sensor exceeds a preset reference range, it is determined that some abnormality has occurred in the sensor and has failed.

The controller 108 of the battery controller 20 calculates the discharge state SOC (State Of Charge) of each battery cell 1 obtained from the A / D converter 105,
(SOC maximum value of each battery cell 1 + minimum value of each battery cell) / 2
The battery cell 1 exceeding is selected. Then, the switches SW connected in series to the resistor R1 are individually conducted for a predetermined time, and the bypass series circuit is individually electrically connected in parallel between the positive electrode and the negative electrode of the battery cell 1. Thereby, the battery cell 1 to which the bypass series circuit is electrically connected in parallel is discharged, and the SOC (State Of Charge) of each battery cell 1 is averaged.

From the obtained information, the controller 108 determines the total voltage value of the cell voltage, whether or not the SOC is within a safe usable range, the calculation of the battery allowable charge / discharge power, the instantaneous power (I ² t), the battery capacity (Ah), the abnormal state, and the like are calculated. Further, when the controller 108 switches the multiplexer 104 and captures the output of the differential amplifier 102, the controller 108 captures a preset voltage by + Vss and −Vee voltage division, and monitors the abnormality in the fixing failure of the multiplexer 104. Do.

The battery controller 20 includes abnormality information of each sensor and transmits information obtained by the above calculation to the host controller 110 via a CAN (Controller Area Network). This communication is performed via a connector 50, which will be described later, provided in the battery controller 20.
In FIG. 1, the circuit board constituting the battery controller 20 may be integrated with the circuit board 114 constituting the cell controller 108 or may be separated.

3 and 4 are diagrams showing an example of a specific configuration of the battery unit 900, FIG. 3 is a perspective view showing an external appearance of the battery unit 900, and FIG. 4 is an exploded perspective view of the battery unit 900.
The battery unit 900 includes a substantially rectangular parallelepiped battery case 900 a including a metal upper lid 46 and a lower lid 45. The lower lid 45 is provided with output terminals 810 and 820 for supplying DC power or receiving DC power.

  A plurality of battery cells 1 are accommodated in the battery case 900a so as to be connected in series. The parts constituting the battery unit 900 have many wires for detecting voltage and temperature, but are covered with a battery case 900a which is a metal case, and thus are protected from external electrical noise. Further, as described above, the battery cell 1 is protected by the battery case 900a and the outer container, and the safety of the power supply system is maintained even if a traffic accident occurs.

  In the present embodiment, the battery cell 1 is a cylindrical lithium secondary battery in which a positive electrode active material is lithium manganese complex oxide, a negative electrode active material is amorphous carbon, and is covered with a casing having high thermal conductivity. The battery cell of this lithium secondary battery has a nominal voltage of 3.6 V and a capacity of 5.5 Ah, but when the state of charge changes, the terminal voltage of the battery cell changes. For example, when the charge amount of the battery cell decreases, it decreases to about 2.0V, and when the charge amount of the battery cell increases, it increases to about 4.0V.

  As shown in FIGS. 3 and 4, the lower lid 45 has a plurality of battery cells 1 connected in series arranged in two rows in the case longitudinal direction. Each row in which a plurality of battery cells 1 are connected in series constitutes a battery module 9. A cell control device (voltage measuring device) 79 is screwed to one end of the lower lid 45.

5 is a perspective view of the cell control device 79 shown in FIG. 4, and FIG. 6 is a perspective view for explaining a method of potting an insulating resin in FIG.
The cell control device 79 has a circuit board 83 for constituting the cell controller 80 shown in FIG. Here, the circuit board 83 is described as including the cell controller 80 and the battery controller 20. The circuit board 83 is screwed to the case 79a (see FIG. 4) of the cell control device 79 in an upright state through a plurality of round holes formed in the upper and lower side edges. Due to such a structure, the entire battery unit 900 can be stored in a relatively small space. Further, the complexity of wiring between each battery cell 1 and the cell controller 80 can be eliminated.

  Connectors 48 and 49 are attached to opposite left and right ends of the circuit board 83 in opposite directions. Although not shown, the connectors 48 and 49 are connected to each battery cell 1 of the battery module 9 via a detection harness.

  The circuit board 83 has a connector 50 to which a communication harness (not shown) for communicating with the host controller 110 is connected. The connector 50 is connected to a connector (not shown) of the host controller 110 via a connection line. Chip elements such as resistors, capacitors, photocouplers, transistors, and diodes are mounted on the circuit board 83.

  That is, the circuit board 83 is provided with connectors 48 and 49 for the two battery modules 9, respectively, and a connector 50 for communicating with the host controller 110 separately from these. Thus, by providing the connectors 48 and 49 and the connector 50 separately, wiring work is facilitated and maintenance is facilitated.

  One of the connectors 48 and 49 connects each battery cell 1 constituting the battery module 9 on the high voltage side in the battery module 9 and the circuit board 83, and the other of the connectors 48 and 49 is the battery module 9. Each battery cell 1 and the circuit board 83 that constitute the battery module 9 on the low voltage side are connected. By using such distributed wiring, the voltage difference in the range that the connectors 48 and 49 are responsible for can be reduced. A partial connection state in which only a part of the connectors 48 and 49 are momentarily connected is generated when the connectors 48 and 49 are connected or opened. However, since the voltage difference in the range of the connectors 48 and 49 can be reduced, the adverse effect of the partial connection state is brought about. Can be reduced.

  The battery modules 9 arranged side by side on the lower lid 45 are connected in series by a switch 6 (see FIG. 2) as a service disconnector. Output terminals 810 and 820 are provided on the front portion of the lower lid 45 for supplying the power of the positive high voltage cable 81 and the negative high voltage cable 82 to the outside or receiving power from the outside.

  The battery unit 900 employs a forced cooling method in which each battery cell 1 of the battery module 9 is forcibly cooled by the blower fan 17 (see FIG. 2) with cooling air. A cooling air intake port 14 is provided on the lower side of one side surface of the lower lid 45 in the longitudinal direction, and an exhaust port 15 (see FIG. 3) is provided on the lower side of the other side surface facing the one side surface. . Although not shown, between the bottom surface of the lower lid 45 and the lower part of each battery cell 1, a duct having a vent hole corresponding to each battery cell 1 is disposed. Cooling air blown by the drive of the blower fan 17 is introduced from the air inlet 14, circulates in the duct, and is ejected from each ventilation hole to the room side where the battery cell 1 is disposed. Then, the battery cells 1 are gathered in a space formed between the battery cell 1 and the upper lid 46 while going around the battery cells 1, and escape from the exhaust port 15. Due to such a structure, the battery module 9 is compact and has an excellent cooling effect.

A part of the cooling air introduced into the battery case 900 a to forcibly cool the battery cell 1 enters the cell control device 79. For this reason, it is necessary to employ a protection structure against electric corrosion and leakage due to moisture, salt, etc. contained in the cooling air.
Hereinafter, a component mounting structure of the cell control device 79 which is a voltage measuring device will be described.

The connectors 48 and 49 and the connector 50 are attached to one surface side of the circuit board 83. The connector 50 is a multi-row vertical connector, and connection pins arranged in a plurality of rows are attached to one surface of the circuit board 83 in a direction perpendicular to the one surface of the circuit board 83. A fixed dam member 61 made of a frame-like insulating synthetic resin surrounding the periphery of the connector 50 is attached to a substantially central portion of the circuit board 83.
The weir member 61 is formed of an insulating synthetic resin material, and has a size for accommodating the connector 50 and the area of the circuit board 83 in the peripheral portion of the connector 50 inside. One surface of the circuit board 83 in the dam member 61 is covered with an insulating resin 71 made of silicon resin, epoxy resin, or the like. The insulating resin 71 is formed by applying and curing a molten insulating resin material from above, that is, from a direction perpendicular to the mounting surface of the connector 50 of the circuit board 83 by potting.

The connectors 48 and 49 are terminal multi-row L-type connectors in which L-shaped connection terminals are arranged in a plurality of rows, and the two connectors have the same structure.
The connectors 48 and 49 are respectively attached to the respective side edges in the longitudinal direction of the circuit board 83, and the areas of the circuit board 83 to which the connectors 48 and 49 are attached are respectively surrounded by the periphery of the connector 48 or 49. A dam member 62 made of a frame-like insulating synthetic resin is attached.
7 is a perspective view of the weir member 62, FIG. 8 is a perspective view of the connector 48 (49) and its vicinity, and FIG. 9 is a diagram for explaining a method of potting insulating resin in FIG. FIG.

  The connector 48 passes through the back surface portion 53 a from the front surface side of the connector main body 53, and a plurality of connection terminals are drawn out and soldered to connection pads (not shown) of the circuit board 83. Each connection terminal has an L shape including a horizontal portion parallel to the connector mounting surface of the circuit board 83 and a vertical portion bent in the vertical direction from the end of the horizontal portion. The connection terminals are located on the side of the circuit board 83 and are located outside the connection terminals 54 in the inner row and the connection terminals 54 in the inner row. In addition, the connection terminals 55 are arranged in groups on the outer row having a large vertical portion. The connection terminals 54 in the inner row and the connection terminals 55 in the outer row are arranged at the same pitch, but are shifted by a half pitch in the arrangement direction. That is, the inner row connection terminals 54 and the outer row connection terminals 55 are alternately arranged in the arrangement direction.

  On the circuit board 83 around the connector 48, dam members 62 surrounding the connection terminals 54 and 55 of the connector 48 are attached. The weir member 62 is formed of an insulating synthetic resin material, and includes a base portion 62a facing the back surface portion 53a of the connector 48, and a pair of side portions 62b and 62c bent in a direction perpendicular to the base portion 62a. The side of the weir member 62 that faces the base portion 62a is cut away, and the weir member 62 has a substantially U-shaped planar shape.

  An opening 63 is formed in an intermediate portion between the side portions 62 b and 62 c of the weir member 62. The side portions 62b and 62c are formed with opening and closing portions 64a and 64b that rotate between a direction parallel to the base portion 62a and a direction perpendicular to the base portion 62a, with the connecting portion with the base portion 62a as a rotation axis. Each of the opening / closing parts 64a and 64b has an engaging part 65 at the other end opposite to the base part 63a. Each engaging part 65 engages with the edge part 66 of the side parts 62b and 62c in the state which block | closed the opening part 63. FIG. In this state, as will be described later, the outflow of the insulating resin is blocked. FIG. 7 shows a state in which the opening / closing part 64b is closed.

The weir member 62 has the notched side side corresponding to the back surface portion 53a of the connector main body 53, and the inner sides of the side portions 62b and 62c are in contact with the side surface portions 53b and 53c of the connector main body 53, respectively. Arranged on the circuit board 83. In this state, the U-shaped weir member 62 and the back surface portion 53 a of the connector main body 53 form a frame surrounding the connection terminals 54 and 55 of the connector 48.
The dam member 62 has a boss portion 67 and is fixed to the circuit board 83 by a fastening member.
As for the dam member 62, the base part 62a, the opening-and-closing parts 64a and 64b which have the engaging part 65, the side parts 62b and 62c, the edge part 66, and the boss | hub part 67 are integrally molded by the resin mold.

  Between the connection terminals 54 in the inner row of the connector 48, between the connection terminals 54 and the circuit board 83, between the connection terminals 55 in the outer row, and between the connection terminals 55 in the outer row and the circuit board 83. As shown by a two-dot chain line in FIG. 8, an insulating resin 72 made of silicon resin, epoxy resin, or the like is filled. The insulating resin 72 is formed by applying a molten insulating resin material from above and from the side by potting and curing.

  Here, a method of forming the insulating resin 72 will be described. As described above, the inner row connection terminals 54 and the outer row connection terminals 55 are shifted by half a pitch in the arrangement direction and are alternately arranged. In this structure, the gap between one connection terminal 54 and the outer terminal 55 adjacent to this connection terminal 54 is very small and has a 1/2 pitch when the connection terminals are in a single row. Yes.

  Therefore, when potting the molten insulating resin material from above the connection terminal 55 in the outer row, if the viscosity of the insulation resin material is large, the insulation is performed by the connection terminal 55 in the outer row and the connection terminal 54 in the inner row. The flow of the resin material is stopped and does not reach the surface of the circuit board 83. Alternatively, it takes a long time to reach the surface of the circuit board 83, and bubbles are involved in the insulating resin. For this reason, work is difficult and the reliability of insulation after completion is lowered.

  On the other hand, when the viscosity of the insulating resin material is small, the insulating resin material penetrates into the connection pin side through the through holes in the back surface portion 53a of the connector 62 through the connection terminals 54 and 55, The reliability of electrical connection with the connection member is reduced. Alternatively, it penetrates to the back surface side through the upper surface of the circuit board 83 and the through hole of the circuit board 83, and the reliability of electrical connection between the circuit board 83 and the electronic component is lowered. Alternatively, the upper portions of the connection terminals 54 and 55 are exposed from the insulating resin material, and electric corrosion and leakage occur.

Therefore, in this embodiment, the insulating resin material is potted not only from above the connection terminal 55 but also from different directions.
Specifically, the following method is used.
First, as shown in FIGS. 6 and 9, one opening / closing part 64a (64b) of the weir member 62 is opened so as to be substantially parallel to the base part 62a.

  Next, with the circuit board 83 standing in the vertical direction with the opening / closing portion 64a of the weir member 62 facing upward, the molten insulating resin material is potted from the opening 63 of the weir member 62. When the potting from the one opening / closing part 64a is completed, the opening / closing part 64a is rotated to engage the engaging part 65 with the end part 66 to shield the opening part 63. FIG. 9 shows a state before potting the molten insulating resin material.

  Next, the circuit board 83 is turned 180 degrees, the other opening / closing portion 64b (64a) of the dam member 62 is opened, and is made substantially parallel to the base portion 62a and melted from the opening 63 of the dam member 62. Potting material. Then, the opening / closing part 64b is rotated, the engaging part 65 is engaged with the end part 66, and the opening part 63 is shielded.

Next, as shown in FIGS. 5 and 8, the circuit board 83 was melted from above the connection terminals 55 with the horizontal portions of the connection terminals 55 of the connectors 48 and 49 facing upward. Potting insulating resin material.
In this case, when it is necessary to form an insulating material in the dam member 62 as shown in FIG. 5 on the circuit board 83, the molten insulating resin is also formed in the dam member 61 in this step. Potting material.
Thereafter, the insulating resins 72 and 71 are formed by curing the insulating resin material.

In the above description, the case where the potting from the arrangement direction of the connection terminals 54 and 55 is performed from both sides of the opening / closing portions 64b and 64c of the dam member 62 has been described, but the pitch of the connection terminals 54 and 55 is relatively large. In some cases, or when the number of connection terminals 54 and 55 is small, potting may be performed only from one opening / closing part 62b or 62c of the weir member 62.
Further, the potting from the upper side of the connection terminal 55 is performed after potting from the arrangement direction of the connection terminals 54 and 55, but conversely, the potting from the upper side of the connection terminal 55 is performed first. After that, potting from the arrangement direction of the connection terminals 54 and 55 may be performed.

  According to the above method, since the potting is performed also from the arrangement direction of the connection terminals 54 and 55, the connection terminal 54 is mainly connected to the horizontal portion and the circuit board 83, and the connection terminal 54 is mainly connected to the vertical portion and connection. The molten insulating resin material can be reliably filled also between the vertical portions of the terminals 55 and between the horizontal portions of the connection terminals 55 and the circuit board 83. Potting performed from the upper side of the connection terminal 55 fills the gap in the arrangement direction mainly in the connection terminal 54 and the gap in the arrangement direction mainly in the connection terminal 55 with the molten insulating resin material. The resin 72 can be formed so as to reliably prevent electrolytic corrosion and electrical leakage.

FIG. 10 is a characteristic diagram showing the relationship between the conductor gap and the withstand voltage between the conductors.
The insulation performance largely depends on the potential difference between adjacent conductors / components and the withstand voltage characteristics of the member on which the conductor / components are arranged. For this reason, if only covering by potting, there is a possibility of causing a leak at the boundary surface with a member on which conductors / components are arranged.
Therefore, the parts and conductor wiring of the circuit board 83 of the cell control device 79 and the connection terminals 54 and 55 of the connectors 48 and 49 are connected between the wirings drawn from the adjacent battery cells 1 based on the withstand voltage Y between the conductors. Are arranged so as to minimize the potential difference. That is, since the battery cells 1 constituting the battery module 9 are connected in series, the wiring terminals connected to the respective battery cells 1 are sequentially directed from the maximum voltage to the minimum voltage from one end side to the other end side. Arrange in order so as to reduce. This also minimizes the distance X (see FIG. 9) between the components of the circuit board 83 and the conductor wiring and the connection terminals 54 and 55 of the connectors 48 and 49 with respect to the withstand voltage Y between the conductors. .

As described above, in the present embodiment, potting can be performed also from the arrangement direction of the connection terminals 54 and 55, and electrolytic corrosion and electrical leakage can be reliably prevented by the insulating resin 72.
Further, since the wiring terminals of the circuit board 83 of the cell control device 79 are arranged so that the potential difference between the wirings drawn from the adjacent battery cells 1 is minimized, the connection terminals 54 and 55 of the connectors 48 and 49 are arranged. The pitch can be minimized, and accordingly, the amount of expensive insulating resin such as silicon resin used can be reduced.

In the above-described embodiment, the weir member 62 is formed by integrally forming the base portion 62a, the side portion 62b having the opening / closing portion 64a, and the side portion 62c having the opening / closing portion 64b with a synthetic resin.
However, the opening / closing part may be formed as a separate body. When the opening / closing part is a separate body, a structure in which an engaging part is provided in the opening / closing part may be used, or the opening / closing part may be fixed to the dam member by a fastening member.

  In the above-described embodiment, the connectors 48 and 49 are described as an example of the parts for potting the connection terminals 54 and 55 with the insulating resin 72. However, the present invention replaces the connectors 48 and 49 with other components such as a power transistor. It is possible to apply to.

  In the above embodiment, the multi-row terminal connectors 48 and 49 and the vertical connector 50 are attached to one surface side of the circuit board 83. However, the present invention is not limited to this structure. Applicable when the potting direction is different. For example, when having parts arranged along different sides of the circuit board, when potting is performed from a direction parallel to one surface of the circuit board, rather than from a direction perpendicular to one surface of the circuit board, Since the direction of potting is different, it is necessary to have a structure having an opening / closing part that can open and shield the dam member of any part, and this is applicable to such a condition.

  The weir member 62 has a structure that opens and closes the opening and closing portions 64a and 64b that open and shield the opening 63, but it may be slidable or foldable. The weir member 62 may be removable from the circuit board 83 after the insulating resin 72 is cured. In this case, the removed dam member 62 may be used as a jig, and an insulating resin may be formed on another circuit board. In such a case, the component mounting board in a state immediately before removing the dam member is included in the present invention.

  Although the case where a lithium ion secondary battery is used as the battery cell has been described, the present invention is also applicable to a circuit board connected to another secondary battery such as a nickel metal hydride battery cell or a nickel cadmium battery cell. Is possible.

  Further, the present invention can be applied not only to secondary batteries but also to other chemical batteries such as fuel cells. In the case of a fuel cell, for example, it can be applied to a structure in which a connector terminal attached to a cell voltage determination board for determining a voltage value output from each battery cell is covered with an insulating resin.

  Furthermore, although the case of the voltage measuring device has been described in the above embodiment, the present invention can also be applied to a device having a function other than voltage measurement.

In addition, the component mounting board of the present invention can be variously modified and configured within the scope of the invention. In short, the component mounting board has a circuit board and connection terminals arranged in a plurality of rows. A terminal multi-row component on which a connection terminal is mounted on a circuit board, a dam member disposed around at least the connection terminal of the terminal multi-row component on the circuit board, and provided inside the dam member, Insulation resin potted between connecting terminals arranged in a plurality of rows and between the connecting terminals and the circuit board, the weir member opening corresponding to the connecting terminals, and opening the opening Any dam member with an opening / closing part having an opening / closing part to be shielded may be used.
The component mounting board of the present invention has a circuit board and a plurality of connection terminals, has a first component mounted on the circuit board, and a plurality of connection terminals, and is mounted on the circuit board. The second component, the first dam member disposed around at least the connection terminal of the first component on the circuit board, and the at least the connection terminal of the second component on the circuit board. A second insulating member, a first insulating resin provided in the first dam member and potted between the plurality of connection terminals of the first component, and provided in the second dam member. And a second insulating resin potted between the plurality of connection terminals of the second component, wherein at least one of the first and second dam members opens and shields the opening. What is necessary is just a dam member with an opening / closing part which has an opening / closing part.

DESCRIPTION OF SYMBOLS 1 Battery cell 9 Battery module 14 Inlet 15 Outlet 20 Battery controller 48, 49, 50 Connector 54, 55 Connection terminal 61, 62 Weir member 62a Base 62b, 62c Side 63 Opening 64a, 64b Opening / closing part 65 Engagement Part 66 End part 71, 72 Insulating resin 79 Cell control device (voltage measuring device)
80 cell controller 83 circuit board 900 battery unit 900a case

Claims (7)

A circuit board;
A terminal multi-row type component having connection terminals arranged in a plurality of rows, wherein the connection terminals are mounted on the circuit board;
A dam member disposed around at least the connection terminal of the terminal multi-row component on the circuit board;
Provided inside the dam member, and provided with insulating resin potted between the connection terminals arranged in the plurality of rows and between the connection terminals and the circuit board,
The component mounting board according to claim 1, wherein the dam member is a dam member with an opening / closing portion having an opening formed corresponding to the connection terminal and an opening / closing portion that opens and shields the opening. A circuit board;
A first component having a plurality of connection terminals and mounted on the circuit board;
A second component having a plurality of connection terminals and mounted on the circuit board;
A first dam member disposed around at least the connection terminal of the first component on the circuit board;
A second weir member disposed around at least the connection terminal of the second component on the circuit board;
A first insulating resin provided inside the first dam member and potted between the plurality of connection terminals of the first component;
A second insulating resin provided inside the second weir member and potted between the plurality of connection terminals of the second component;
At least one of the first and second dam members is a dam member with an opening / closing portion having an opening and an opening / closing portion that opens and shields the opening.   3. The component mounting board according to claim 1, wherein the dam member with an opening / closing portion closes the opening / closing portion with the insulating resin potted from the opening in a state where the opening / closing portion is opened. A component mounting board characterized by having a structure confined in a dam member with part.   4. The component mounting board according to claim 1, wherein the opening / closing portion of the dam member with the opening / closing portion rotates around a base portion on one end side of the opening portion to shield the opening portion. A component mounting board having an engaging portion that engages with an end portion on the other end side of the opening portion in a state.   5. The component mounting board according to claim 1, wherein the dam member with an opening / closing portion is formed in a frame-like shape surrounding the entire periphery together with a part of the component. Component mounting board characterized by. The component mounting board according to any one of claims 1 to 5, wherein the circuit board is:
The wiring terminal has a plurality of wiring terminals connected to the connection terminals of the component, and the wiring terminals are connected from the maximum voltage from one end side to the other end side so that the potential difference between the adjacent wiring terminals is minimized. The component mounting boards are arranged in order of decreasing to the minimum voltage.   7. The component mounting board according to claim 1, wherein the circuit board is connected to a battery module having a plurality of battery cells and detects detection of a terminal voltage of each of the battery cells. A component mounting board comprising a voltage measurement circuit.

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