JP6652017B2 - Power supply circuit device - Google Patents

Description

  The present invention relates to a power supply circuit device applied to a power supply system having a plurality of storage batteries.

  2. Description of the Related Art Conventionally, for example, as a vehicle-mounted power supply system mounted on a vehicle, two storage batteries (for example, a lead storage battery and a lithium ion storage battery) connected in parallel to a generator and an electric load have been used. A configuration for supplying power to a load is known. In this case, a switch is provided in an electric path between the generator and each storage battery, and charging and discharging of each storage battery is controlled by opening and closing the switch.

  Further, a technique is known in which a bypass path is provided so as to bypass a switch in an electric path between a generator and each storage battery, and a normally-closed bypass relay is provided in the bypass path (for example, see Patent Document 1). . In this technique, the switch is turned off (open) while the vehicle is stopped, and even if one of the two storage batteries (lithium ion storage battery) is shut off, the other is achieved by closing the bypass relay. Supply of dark current from a storage battery (lead storage battery) to an electric load is possible. Further, when a failure related to charging and discharging of the storage battery occurs, as a fail-safe process, the switch is opened and the bypass relay is closed. Thus, even if the switch is turned off (open) and one of the two storage batteries (lithium-ion storage battery) is shut off, the electric load is continued by supplying power from the other storage battery (lead storage battery). Operation is possible.

JP 2012-130108 A

  However, when the bypass relay is closed, there is a concern that inconvenience may occur in an energized state via the bypass relay. For example, as a fail-safe process, when the switch is opened and the bypass relay is closed, it is considered that power generated by the generator may flow through the bypass path. It is feared that an excessive current exceeding the allowable value will flow in this case. In addition, there is a concern that a disadvantage that the generated power is restricted in the generator in order to suppress an excessive current from flowing through the bypass path.

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide a power supply circuit device capable of optimizing energization in a power supply system.

  Hereinafter, the means for solving the above-described problems and the operation and effect thereof will be described. In the following, for ease of understanding, reference numerals of corresponding components in the embodiments of the invention are appropriately shown in parentheses and the like, but are not limited to the specific configurations shown in parentheses and the like.

In the first invention,
A power supply circuit device applied to a power supply system in which a first storage battery (11) and a second storage battery (12) are connected in parallel to a generator (16, 70),
An energization control switch (21, 71) that is provided on a power supply path (L1) to which power of the generator and the first storage battery is supplied in the power supply system, and that sets the power supply path to an energized or de-energized state;
A bypass opening / closing section (RE, RE1, RE2) that is provided in a bypass path (Lb, B1, B2) that bypasses the energization control switch and that energizes or de-energizes the bypass path;
With
The bypass opening / closing section has a first switch section (23, 73, 75, 91) and a second switch section (24, 74, 76, 92) provided in parallel with each other, and each of the switch sections is Closed when the energization control switch is opened.

  According to the above configuration, the power supply path is energized or de-energized between the first storage battery side and the second storage battery side by turning on and off the energization control switch. At this time, when the power supply control switch is turned off, the supply of the power generated by the generator via the power supply path is stopped. In addition, since a bypass path bypassing the energization control switch is provided and a bypass opening / closing section is provided in the bypass path, if the bypass opening / closing section is closed, the energization control switch is turned off. Even so, it is possible to supply the generated power of the generator via the bypass path.

  Here, in the state where the power supply control switch is turned off, when power is supplied via the bypass opening / closing section, power supply is performed via the bypass path instead of the normal power supply path. It is feared that an excessive current exceeding the allowable value flows. In this regard, the bypass opening / closing unit has a first switch unit and a second switch unit provided in parallel with each other, and these switch units are configured to be closed when the energization control switch is opened. Even when power is supplied through the bypass opening / closing unit in a state where the control switch is turned off, it is possible to suppress a disadvantage that the current flowing through the bypass opening / closing unit exceeds an allowable value. That is, by arranging the switches of the bypass switching unit in parallel, the allowable current of the bypass switching unit can be increased, and the components in the bypass switching unit can be protected. As a result, the power distribution in the power supply system can be optimized.

  In the second invention, the first switch section and the second switch section each include a coil (23a, 24a) that is excited by energization and a switch (23b) that is opened and closed by a movable contact that moves in accordance with the excitation of the coil. , 24b), the first bypass relay (23) and the second bypass relay (24), respectively, wherein the first bypass relay and the second bypass relay have different vibration conditions when vibration occurs.

  When using a mechanical bypass relay as the bypass opening / closing unit, there is a concern that the movable contact may temporarily move to the open or closed position due to vibration, and the bypass opening / closing unit may be opened and closed unintentionally. Is done. In this regard, the bypass opening / closing unit is paralleled by the first bypass relay and the second bypass relay, and the respective bypass relays are configured to have different vibration conditions when vibration occurs. Therefore, in an environment where vibration is likely to occur. Even if each bypass relay is installed, the disadvantage that unintended opening or closing occurs simultaneously in each bypass relay is less likely to occur. Therefore, the operation of the bypass opening / closing unit can be optimized.

  In a third aspect, a circuit board (63) on which the first bypass relay and the second bypass relay are mounted is provided, and the circuit board is fixed to a fixing target (61) by a board fixing section (65). The first bypass relay and the second bypass relay are mounted on the circuit board at positions at different distances from the board fixing portion.

  Since the bypass relays are mounted on the circuit board at positions different from each other from the board fixing portion, the resonance points of vibration of the bypass relays are shifted from each other. As a result, vibration is applied to the circuit board, and when the vibration is transmitted to each bypass relay via the circuit board, the state of vibration differs for each bypass relay. In this case, it can be said that the first bypass relay and the second bypass relay have different vibration conditions. With this configuration, unintended opening or closing of each bypass relay due to vibration is prevented from occurring at the same time, and operation of the bypass opening / closing unit can be optimized.

  In a fourth aspect, the first bypass relay and the second bypass relay are at least one of a moving direction of the movable contact, a movable length of a movable portion provided with the movable contact, and a weight of the movable portion. Are different from each other.

  By making the moving directions of the movable contacts different from each other in each bypass relay, there is a different possibility that the contacts are unintentionally opened and closed when vibration in a certain direction is applied. For example, when the moving direction of the contact is parallel to the board surface of the circuit board in the first bypass relay, and the moving direction of the contact is orthogonal to the board surface of the circuit board in the second bypass relay, the circuit board When vibration occurs in a direction perpendicular to the plane, unintended opening and closing of contacts is less likely to occur in the first bypass relay than in the second bypass relay. In this case, it can be said that the first bypass relay and the second bypass relay have different vibration conditions. With this configuration, unintended opening or closing of each bypass relay due to vibration is prevented from occurring at the same time, and operation of the bypass opening / closing unit can be optimized.

  In addition, even when the movable length of the movable portion provided with the movable contact in each bypass relay and the weight of the movable portion are different from each other, it is also possible to make the vibration conditions different from each other in each bypass relay. It is possible to suppress unintentional simultaneous opening and closing of the relay.

  In a fifth aspect, a circuit board (63) on which the first bypass relay and the second bypass relay are mounted is provided, and the circuit board is located at a position facing a battery module (61) constituting the second storage battery. The first bypass relay and the second bypass relay are mounted on a portion of the circuit board facing the battery module.

  When a circuit board is provided to face a battery module, it is necessary to consider the influence of heat on the battery module and the circuit board. In this regard, since the first bypass relay and the second bypass relay arranged in parallel are mounted on the opposing portion of the circuit board facing the battery module, heat generation per bypass relay is suppressed. In this case, it is not necessary to add a heat radiating structure to the bypass relay while considering the mutual heat effect between the battery module and the circuit board.

  In the sixth invention, the first switch section is a normally-closed bypass having a coil (91a) excited by energization and a switch (91b) opened and closed by a movable contact that moves in accordance with excitation of the coil. The second switch section is constituted by a semiconductor switching element (92).

  In a configuration in which a normally-closed bypass relay is used as the first switch unit and a semiconductor switching element is used as the second switch unit, each switch unit has an effect of increasing the permissible current of the bypass opening / closing unit, and each switch unit is intended to be vibrated. Inconveniences such as opening and closing at the same time without the need to do so can be suppressed. In particular, when the power supply system is stopped, the dark current can be supplied using only the normally-closed bypass relay. In addition, when an abnormality occurs in the operating state of the power supply system, by using both the bypass relay and the semiconductor switching element, it is possible to prevent the bypass opening / closing unit from being unintentionally opened due to vibration.

FIG. 1 is a circuit diagram showing a configuration of an entire system. The figure which shows the specific structure of a bypass relay. 4 is a time chart showing an outline of power supply control according to the IG on / off of the vehicle. FIG. 3 is an explanatory diagram for explaining a state of opening and closing of a switch and a bypass relay. The perspective view which shows the state which removed the cover and exposed the inside in the battery unit. The top view which shows the state which removed the cover and exposed the inside in the battery unit. FIG. 4 is a plan view showing mounting positions of switches and bypass relays on a circuit board, and a board fixing portion with respect to an accommodation case. FIG. 9 is a circuit diagram illustrating a system configuration according to a second embodiment. FIG. 9 is a circuit diagram illustrating a system configuration according to a second embodiment. The figure which shows the specific structure of a bypass relay. FIG. 9 is a circuit diagram showing a system configuration in another mode.

(1st Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an in-vehicle power supply system that supplies electric power to various devices of a vehicle running on an engine (internal combustion engine) as a drive source is embodied.

  As shown in FIG. 1, the present power supply system is a dual power supply system including a lead storage battery 11 as a first storage battery and a lithium ion storage battery 12 as a second storage battery. Power can be supplied to various electric loads 14 and 15. Each of the storage batteries 11 and 12 can be charged by the generator 16. In this system, the lead storage battery 11 and the lithium ion storage battery 12 are connected in parallel to the generator 16, and the lead storage battery 11 and the lithium ion storage battery 12 are connected in parallel to the electric loads 14 and 15.

  The lead storage battery 11 is a known general-purpose storage battery. On the other hand, the lithium-ion storage battery 12 is a high-density storage battery that has a smaller power loss during charging and discharging, a higher output density, and a higher energy density than the lead storage battery 11. The lithium ion storage battery 12 is preferably a storage battery having higher energy efficiency during charging and discharging than the lead storage battery 11. Further, the lithium ion storage battery 12 is configured as an assembled battery having a plurality of unit cells. Each of these storage batteries 11 and 12 has the same rated voltage, for example, 12V.

  The lithium ion storage battery 12 is housed in a housing case and configured as a battery unit U integrated with a substrate (this point will be described later). In the present embodiment, the “power supply circuit device” is configured by the battery unit U. The battery unit U has output terminals P0, P1, and P2, among which the lead storage battery 11, the starter 13, the electric load 14, and the generator 16 are connected to the output terminals P0, P1, and the electric load is connected to the output terminal P2. 15 are connected.

  The electric loads 14 and 15 have different requirements for the voltage of the power supplied from the storage batteries 11 and 12. Among them, the electric load 15 includes a constant voltage request load that is required to be stable so that the voltage of the supplied electric power is constant or fluctuates at least within a predetermined range. On the other hand, the electric load 14 is a general electric load other than the constant voltage request load. The electric load 15 can be said to be a protected load. Also, it can be said that the electric load 15 is a load in which power failure is not allowed, and the electric load 14 is a load in which power failure is allowed compared to the electric load 15.

  Specific examples of the electric load 15 that is a constant voltage request load include various ECUs such as a navigation device, an audio device, a meter device, and an engine ECU. In this case, by suppressing the voltage fluctuation of the supplied power, the occurrence of unnecessary reset or the like in each of the above devices is suppressed, and a stable operation can be realized. The electric load 15 may include a travel system actuator such as an electric steering device or a brake device. Specific examples of the electric load 14 include a seat heater, a heater for a defroster of a rear window, a headlight, a wiper of a front window, a blower fan of an air conditioner, and the like.

  The generator 16 is connected to an output shaft of an engine (not shown) by a belt or the like, generates power by rotation of the engine output shaft, and supplies the generated power to the storage batteries 11 and 12 and the electric loads 14 and 15.

  In the battery unit U, an electric path L1 connecting the output terminals P1 and P2 and an electric path L2 connecting the point N1 on the electric path L1 and the lithium ion storage battery 12 are provided as electric paths in the unit. The switch 21 is provided on the electric path L1 and the switch 22 is provided on the electric path L2. The power generated by the generator 16 is supplied to the lithium ion storage battery 12 and the electric load 15 via the electric paths L1 and L2. In the electric path from the lead storage battery 11 to the lithium-ion storage battery 12, a switch 21 is provided between a connection point N0 with the generator 16 and a connection point N1 with the electric load 15, and the switch 21 is provided at a position higher than the connection point N1. A switch 22 is provided on the side of the lithium ion storage battery 12. The switch 21 corresponds to an “energization control switch”.

  Each of the switches 21 and 22 includes, for example, 2 × n MOSFETs (semiconductor switching elements), and is connected in series so that the parasitic diodes of the pair of MOSFETs are opposite to each other. When the switches 21 and 22 are turned off, the current flowing through the path provided with the switches is completely cut off by the parasitic diode. Note that an IGBT, a bipolar transistor, or the like may be used as the switches 21 and 22 instead of the MOSFET. When an IGBT or a bipolar transistor is used as the switches 21 and 22, instead of the above-mentioned parasitic diode, an opposite diode may be connected to each of the switches 21 and 22 in parallel.

  Further, the battery unit U is provided with a bypass route Lb that bypasses the switch 21. The bypass path Lb is provided so as to connect the output terminal P0 to a point N1 on the electric path L1. The bypass path Lb enables the connection between the lead storage battery 11 and the electric load 15 without the intervention of the switch 21. The bypass path Lb is provided with a bypass opening / closing circuit RE for turning the bypass path Lb on or off. By closing the bypass switching circuit RE, even when the switch 21 is turned off, the power generated by the generator 16 can be supplied to the electric load 15 via the bypass path Lb. I have. The bypass path Lb includes a dark current path that supplies a dark current to the electric load 15 when the power supply system is stopped, and a failure path that supplies the generated current of the generator 16 to the electric load 15 when the fail-safe processing is performed. It also serves as a power supply path.

  The bypass opening / closing circuit RE has bypass relays 23 and 24 formed of, for example, normally closed mechanical relays, and these bypass relays 23 and 24 are provided in a state of being connected in parallel to each other on the bypass path Lb. The bypass switching circuit RE corresponds to a “bypass switching unit”, and the bypass relays 23 and 24 correspond to “first and second switch units”.

  The bypass relays 23 and 24 are relay modules that include coils 23a and 24a that are excited by energization and switches 23b and 24b that are opened and closed by movable contacts that move according to the excitation of the coils 23a and 24a. One end of each of the coils 23a and 24a is connected via a diode 25 to a point A1 closer to the output terminal P1 than the switch 21 on the electric path L1, and is connected to a point A2 closer to the output terminal P2 than the switch 21 on the electric path L1. The point A2 is connected via a diode 26. The other ends of the coils 23a and 24a are grounded. A relay drive switch 27, 28 is provided in a conduction path of each of the coils 23a, 24a. When the relay drive switches 27, 28 are turned on, the coils 23a, 24a are energized. The switches 23b and 24b are opened by energizing the coils 23a and 24a. Assuming that the bypass relays 23 and 24 are driven simultaneously, a single switch may be used for the relay drive switches 27 and 28.

  The output terminal P1 is connected to the lead storage battery 11 and the generator 16 via a fuse 31, and the output terminal P0 is connected to the lead storage battery 11 and the generator 16 via a fuse 32.

  Here, a specific configuration of the bypass relays 23 and 24, which are mechanical relays, will be described with reference to FIG. In the present embodiment, the bypass relays 23 and 24 have the same configuration, and the configuration of the bypass relay 23 is shown in FIG. FIG. 2 shows a state in which the bypass relay 23 is mounted on the board K.

  The bypass relay 23 has a fixed contact 41 and a movable contact 43 provided at a tip of a movable iron piece 42 as a movable part. The movable iron piece 42 is urged by a return spring 44 in the downward direction in the figure, that is, in a direction in which the movable contact 43 is pressed against the fixed contact 41. A coil 45 is provided near the movable iron piece 42. In terms of the relationship with the substrate K, the fixed contact 41 and the movable contact 43 are arranged side by side in a direction perpendicular to the substrate surface, and the movable contact 43 approaches the substrate K by the rotational displacement of the movable iron piece 42. Or it is displaced away. In terms of the correspondence with the bypass relay 23 shown in FIG. 1, the switches 23b of FIG. 1 are constituted by the contacts 41 and 43, and the coil 23a is constituted by the coil 45.

  When the coil 45 is not energized, the state in which the movable contact 43 is pressed against the fixed contact 41 by the urging force of the return spring 44 is maintained. This is the state where the bypass relay 23 is closed. When the coil 45 is energized, the movable iron piece 42 is displaced upward in the drawing against the urging force of the return spring 44 due to the electromagnetic force generated in the coil 45, and the movable contact 43 is separated from the fixed contact 41 accordingly. This is the state where the bypass relay 23 is opened.

  Returning to the description of FIG. 1, the battery unit U includes a control unit 30 that controls on / off (open / close) of the switches 21 and 22 and driving of the bypass relays 23 and 24. The control unit 30 is configured by a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and the like. The control unit 30 controls ON / OFF of each of the switches 21 and 22 based on the running state of the vehicle and the power storage state of each of the storage batteries 11 and 12. Thereby, charge and discharge are performed using the lead storage battery 11 and the lithium ion storage battery 12 selectively. For example, the control unit 30 calculates the SOC (state of charge) of the lithium ion storage battery 12 and charges and discharges the lithium ion storage battery 12 so that the SOC is kept within a predetermined usage range. Control.

  The control unit 30 closes the bypass relays 23 and 24 when the vehicle-mounted power supply system is stopped (i.e., when the ignition switch is off), and closes the bypass relays 23 and 24 when the vehicle-mounted power supply system is operating (i.e., when the ignition switch is on). Is performed to release.

  In addition, the control unit 30 performs an abnormality determination regarding the charging and discharging of the lithium ion storage battery 12, forcibly sets the switches 21 and 22 to an open state as a fail-safe process when an abnormality occurs, The control for closing the bypass relays 23 and 24 is performed. For example, the control unit 30 uses a current sensor or a temperature sensor to detect that an overcurrent is flowing through the lithium ion storage battery 12 or that the temperature of the lithium ion storage battery 12 is excessively high. Perform fail-safe processing. In short, the bypass relays 23 and 24 are closed when the switches 21 and 22 are opened. Note that the abnormality determination of the lithium ion storage battery 12 may be performed by detecting the output voltage of the lithium ion storage battery 12 when the switch 22 is opened, for example.

  FIG. 3 is a time chart showing an outline of power control according to turning on / off of an ignition switch (IG) of the vehicle.

  In FIG. 3, before timing t1, the IG is off (for example, in a parking state), the switches 21 and 22 are kept off, and the bypass relays 23 and 24 are closed because the coils 23a and 24a are not energized. It is in a state. Then, when the IG is turned on at the timing t1, the switch 21 is turned on, and then at the timing t2, the bypass relays 23 and 24 are opened with the start of energization of the coils 23a and 24a. Immediately after the IG is turned on, an overlap period (t1 to t2) is provided in which the switch 21 is turned on and the bypass relays 23 and 24 are closed. Further, at the timing t3, the charge / discharge of the lithium ion storage battery 12 is started as the switch 22 is turned on. After the timing t3, the on / off state of each of the switches 21 and 22 is appropriately controlled in a state where at least one of the switches 21 and 22 is on.

  After that, when the IG is turned off at the timing t4, the bypass relays 23 and 24 are closed with the stop of the energization of the coils 23a and 24a, and then the switches 21 and 22 are turned off at the timing t5.

  In the IG ON state, as shown in FIG. 4A, the switches 21 and 22 are ON and the bypass relays 23 and 24 are open. If the generator 16 is generating power in this state, the generated power is supplied to the lead storage battery 11 and the electric load 14, and the lithium ion storage battery is connected to the battery unit U through the electric paths L1 and L2. The generated power is supplied to the power supply 12 and the electric load 15.

  In the IG-off state, as shown in FIG. 4B, the switches 21 and 22 are turned off and the bypass relays 23 and 24 are closed. Is supplied with a dark current. Further, a dark current is supplied from the lead storage battery 11 to the electric load 15 via the bypass path Lb.

  Further, when the fail-safe processing is performed with the IG on, the switches 21 and 22 are off and the bypass relays 23 and 24 are closed as shown in FIG. If the generator 16 is generating power in such a state, the generated power is supplied to the lead storage battery 11 and the electric load 14 and is also generated to the electric load 15 through the bypass path Lb of the battery unit U. Power is supplied.

  The control unit 30 is connected to an ECU 40 including, for example, an engine ECU. The ECU 40 is configured by a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and controls the operation of the engine based on the engine operating state and the vehicle running state each time. The control unit 30 and the ECU 40 are connected by a communication network such as CAN and can communicate with each other, and various data stored in the control unit 30 and the ECU 40 can be shared with each other.

  As a fail-safe process in the battery unit U, when the switches 21 and 22 are forcibly turned off and the bypass opening / closing circuit RE on the bypass path Lb is closed, the electric power is supplied from the generator 16 via the bypass path Lb. It is conceivable that the generated power is supplied to the load 15. In such a case, there is a concern that a problem may occur due to an overcurrent flowing in the bypass switching circuit RE. In this regard, as described above, since the bypass relays 23 and 24 are provided in the bypass path Lb in a two-parallel state, when the generated power is supplied from the generator 16 to the electric load 15, the energizing current is reduced by the respective bypass relays. 23 and 24. This suppresses a current exceeding the allowable value from flowing through the bypass switching circuit RE, and can protect the bypass switching circuit RE. Further, since the allowable current flowing through the bypass path Lb can be increased, the disadvantage that the power generated by the generator 16 is limited is also suppressed.

  On the other hand, in the battery unit U, it is conceivable that the bypass relay forming the bypass opening / closing circuit RE is unintentionally opened due to the vibration generated when the vehicle travels. This will be described using the configuration of the bypass relay 23 described in FIG. Here, assuming that the bypass opening / closing circuit RE is constituted by a single bypass relay 23, a description will be given of the fact that the bypass opening / closing circuit RE is unintentionally opened.

  That is, while the vehicle is stopped (while the IG is off), energization of the coil 45 is stopped, and the contacts 41 and 43 are held in contact with each other by the urging force of the return spring 44 (switch closed state). In this state, when vibration is applied to the bypass relay 23, the movable iron piece 42 is displaced against the urging force of the return spring 44. As a result, the movable contact 43 temporarily moves to the open position, and as a result, the bypass relay 23 is unintentionally opened. When the bypass relay 23 is unintentionally opened, the supply of the dark current to the electric load 15 is unintentionally stopped.

  Also, when the fail-safe process is performed while the vehicle is running (while the IG is on), similarly to when the vehicle is stopped (while the IG is off), the energization of the coil 45 is stopped and the contacts 41, 43 is kept in contact. Even in this state, there is a concern that the bypass relay 23 is unintentionally opened due to vibration. When the bypass relay 23 is unintentionally opened, there is a disadvantage that the supply of power to the electric load 15 is unintentionally stopped.

  Therefore, in the present embodiment, the following measures are taken against unintentional power supply interruption in the bypass switching circuit RE. That is, two parallel bypass relays 23 and 24 are provided as the bypass opening / closing circuit RE, and the bypass relays 23 and 24 have different vibration conditions when vibration occurs. More specifically, in the circuit board on which the bypass relays 23 and 24 are mounted, the bypass relays 23 and 24 are mounted at positions different from each other by a distance from the board fixing portion.

  Hereinafter, the mounting state of the bypass relays 23 and 24 on the circuit board in the battery unit U will be specifically described with reference to the configuration of the battery unit U. FIG. 5 is a perspective view showing a state in which the cover is removed from the battery unit U to expose the inside, and FIG. 6 is a plan view of the battery unit U in the state of FIG.

  The battery unit U includes, as main components, a housing case 61 formed of a metal material such as aluminum or a synthetic resin material, a battery module 62 housed in the housing case 61, and an upper part of the battery module 62. And a circuit board 63 arranged in an overlapping manner. The storage case 61 has a base in the shape of a box with a bottom and a cover assembled above the base. Only the base is shown as the storage case 61 in FIGS. 5 and 6. The battery unit U is mounted on the vehicle by fixing the housing case 61 (base) to a predetermined mounting location, and is fixed to the vehicle in the state of FIG. 5, that is, with the circuit board 63 facing upward. Is done.

  The assembled battery module 62 is formed by integrating a plurality of unit cells connected in series, and corresponds to the lithium ion storage battery 12 in FIG. In FIG. 6, the outer edge of the battery module 62 is shown by a thick line to clarify the position of the battery module 62. The battery module 62 is fixed to the housing case 61 by a fixing tool such as a screw at a plurality of fixing portions 64.

  On the circuit board 63, a microcomputer as the control unit 30 for controlling charging and discharging in the battery pack module 62, switches 21 and 22, and bypass relays 23 and 24 are mounted. FIG. 6 shows the mounting positions of the switches 21 and 22 and the mounting positions of the bypass relays 23 and 24. Each of the switches 21 and 22 includes a plurality of semiconductor switching elements (power elements for power control), and inputs and outputs power to the assembled battery module 62 (that is, sets) by opening and closing (on / off) the semiconductor switching elements. Charge / discharge of the battery module 62) is appropriately controlled. In this embodiment, as shown, the switch 21 is configured by six semiconductor switching elements, and the switch 22 is configured by four semiconductor switching elements.

  The circuit board 63 has a facing portion facing the battery module 62 and a non-facing portion not facing the battery module 62. The switches 21 and 22 are mounted on the non-facing portion. Although not shown, the housing case 61 is provided with a heat radiating portion at a position on the side of the battery module 62, and the heat radiating portion does not face the battery module 62 on the circuit board 63. Opposed to the opposing portion. That is, since the switches 21 and 22 including the power control power elements are also heat generating members, it is necessary to consider the influence of heat on the assembled battery module 62 and the circuit board 63. Therefore, considering the influence of heat, the switches 21 and 22 are mounted on the circuit board 63 at positions not facing the battery module 62 but facing the heat radiating portion.

  On the other hand, the bypass relays 23 and 24 generate less element heat than the switches 21 and 22. Further, the bypass relays 23 and 24 are provided in parallel. Therefore, there is no need to consider the influence of heat generation so much, and the circuit board 63 is mounted at a position facing the battery module 62.

  The circuit board 63 is fixed to the housing case 61 by a fixing tool such as a screw at a plurality of fixing portions 65. In the present embodiment, the housing case 61 corresponds to a “fixed object”, and the fixing portion 65 corresponds to a “board fixing portion”. The fixing portions 65 and 66 are shown on the circuit board 63 as fixing portions using screws or the like. Of these, the fixing portion 66 is used to fix the connector portion 67 for signal output to the circuit board 63. It is a fixed part.

  FIG. 7 is a plan view showing mounting positions of the switches 21 and 22 and the bypass relays 23 and 24 on the circuit board 63 and a fixing portion 65 of the circuit board 63 to the housing case 61. As shown in FIG. 7, the bypass relays 23 and 24 are mounted at positions that are arranged side by side with each other, and the mounting position is separated from a fixed part 65A closest to the bypass relays 23 and 24 among the plurality of fixed parts 65 as a reference. The distances are different from each other. In FIG. 7, distances from the fixed portion 65A to positions near the centers of the bypass relays 23 and 24 are indicated as D1 and D2, and D1 <D2. In FIG. 7, the distances D1 and D2 are distances in the direction in which the bypass relays 23 and 24 are arranged, but may be distances to the centers of gravity of the bypass relays 23 and 24.

  Since the bypass relays 23 and 24 have different distances from the predetermined fixed portion 65A, vibration conditions when vibration occurs are different from each other. Therefore, even in a situation where vibration is applied to the battery unit U in the vehicle mounted state, the inconvenience that unintended opening occurs simultaneously in the bypass relays 23 and 24 is less likely to occur.

  That is, since the bypass relays 23 and 24 have different distances from the fixing portion 65A, the resonance points of vibration of the bypass relays 23 and 24 are shifted from each other. As a result, vibration is applied to the circuit board 63, and when the vibration is transmitted to the respective bypass relays 23 and 24 via the circuit board 63, the state of vibration differs for each of the bypass relays 23 and 24. Specifically, in the bypass relay 23 closer to the fixed portion 65A, it is considered that it is less likely that the contacts are unintentionally opened due to resonance during low-frequency vibration. On the other hand, in the bypass relay 24 farther from the fixing portion 65A, it is considered that it is less likely that the contacts are unintentionally opened due to resonance during high-frequency vibration. In addition, it is considered that, with respect to the impact on the battery unit U, it is unlikely that the contact is unintentionally opened due to the attenuation by the circuit board 63 in the bypass relay 24 far from the fixing portion 65A.

  In the above configuration, when the IG is turned off or the fail-safe is performed, even if the contact is opened in one of the bypass relays 23 and 24 due to the generation of vibration, the other is maintained in the closed state. Therefore, an unintended opening of the path between the lead storage battery 11 and the generator 16 and the electric load 15 is suppressed, and the path from the lead storage battery 11 and the generator 16 to the electric load 15 is suppressed. Power supply can be continuously performed.

  Note that a plurality of fixing portions 65 are provided on the circuit board 63. In this regard, in the positional relationship between each of the fixed portions 65 and each of the bypass relays 23 and 24, the bypass relays 23 and 24 preferably have different total values of the separation distances from the fixed portions 65. Further, among the plurality of fixing portions 65, the separation distance may be different from each other with reference to a predetermined fixing portion 65 other than the fixing portion 65A closest to the bypass relays 23 and 24. Note that the separation distance corresponds to the shortest distance between the fixed portion 65 and the center of each of the bypass relays 23 and 24.

  According to the embodiment described above, the following excellent effects can be obtained.

  When power is supplied through the bypass switching circuit RE with the switch 21 turned off, power is supplied through the bypass path Lb instead of the normal power supply path. It is feared that an excessive current exceeding the value flows. In this regard, the bypass opening / closing circuit RE includes bypass relays 23 and 24 provided in parallel with each other, and these bypass relays 23 and 24 are closed when the switch 21 is opened. Even when the power is supplied through the bypass switching circuit RE in the off state, it is possible to suppress the inconvenience that the current flowing through the bypass switching circuit RE exceeds an allowable value. That is, by configuring the bypass relays 23 and 24 of the bypass switching circuit RE in parallel, it is possible to increase the allowable current of the bypass switching circuit RE, and it is possible to protect components in the bypass switching circuit RE. As a result, the power distribution in the power supply system can be optimized.

  In addition, by increasing the allowable current of the bypass switching circuit RE, the generated power that can be supplied via the bypass path Lb can be increased. Therefore, for example, when the switches 21 and 22 are off and the bypass relays 23 and 24 are closed when performing the fail-safe process, the restriction on the power generated by the generator 16 can be eased. Therefore, when the fail-safe process is performed, charging of the lead storage battery 11 and power supply to the electric loads 14 and 15 can be suitably performed.

  The bypass opening / closing circuit RE is parallelized by the bypass relays 23 and 24, and the bypass relays 23 and 24 are configured to have different vibration conditions when vibration occurs. Accordingly, even if the bypass relays 23 and 24 are installed in an environment where vibration is likely to occur, the inconvenience that unintended opening occurs simultaneously in the bypass relays 23 and 24 is less likely to occur. Therefore, the operation of the bypass switching circuit RE can be optimized.

  In order to make the vibration conditions of the bypass relays 23 and 24 different, the bypass relays 23 and 24 are mounted on the circuit board 63 at positions different from each other at a predetermined distance from the fixed portion 65A. In this case, since the resonance points of the vibrations are shifted from each other in the bypass relays 23 and 24, the unintended opening of the bypass relays 23 and 24 due to the vibration is prevented from occurring at the same time. Optimization is possible. In this configuration, it is not necessary to change the relay structure and the like in suppressing unintended simultaneous opening of the bypass relays 23 and 24, and a desired effect can be obtained while using a simple configuration. it can.

  Since the bypass relays 23 and 24 arranged in parallel are mounted on a portion of the circuit board 63 facing the battery module 62, heat generation per bypass relay is suppressed. In this case, it is not necessary to add a heat dissipation structure to the bypass relays 23 and 24 while considering the mutual heat effect between the battery module 62 and the circuit board 63.

  According to the above configuration of the bypass opening / closing circuit RE, it is possible to prevent the bypass relays 23 and 24 in the closed state from being simultaneously and unintentionally opened due to vibration, and also to prevent the bypass relays in the open state from being opened simultaneously. 23 and 24 can be prevented from being simultaneously closed unintentionally due to vibration.

(2nd Embodiment)
Next, the second embodiment will be described focusing on differences from the first embodiment. FIG. 8 is a system configuration diagram in the present embodiment.

  As shown in FIG. 8, this power supply system is a two-power supply system having a lead storage battery 11 and a lithium ion storage battery 12 as in FIG. 1, and the output terminal P1 of the battery unit U has a lead storage battery 11, a starter 13, The electric load 14 is connected, the rotating electric machine 70 is connected to the output terminal P2, and the electric load 15 is connected to the output terminal P3. The rotating electric machine 70 is a generator with a motor function having a three-phase AC motor and an inverter as a power conversion device, and is configured as an ISG (Integrated Starter Generator) integrated with electromechanical. The rotating electric machine 70 has a power generation function of generating power (regenerative power generation) by rotation of an engine output shaft and an axle, and a power running function of applying a rotational force to the engine output shaft.

  In the battery unit U, a switch 21 is provided on an electric path L1 connecting the output terminals P1 and P2, and a switch 22 is provided on an electric path L2 connecting the point N1 on the electric path L1 and the lithium ion storage battery 12. I have. Further, in the battery unit U of the present embodiment, in addition to the electric paths L1 and L2, an electric path L3 connecting the point N2 on the electric path L1 and the output terminal P3, a point N3 of the electric path L2 and an electric path L3. And a switch 71 is provided in the electrical path L3 (specifically, between N2 and N4), and a switch is provided in the electrical path L4 (specifically, between N3 and N4). 72 are provided. The electric paths L3 and L4 form a power supply path that enables electric power to be supplied from any one of the storage batteries 11 and 12 and the rotating electric machine 70 to the electric load 15.

  Further, the battery unit U is provided with bypass paths B1 and B2 that enable the lead storage battery 11 to be connected to the rotating electric machine 70 and the electric load 15 without passing through the switches 21 and 71 in the unit. One end of the bypass path B1 is connected to the output terminal P0, and the other end is connected to a connection point N1 on the electric path L1 inside the unit. A bypass opening / closing circuit RE1 is provided in the bypass path B1. The bypass opening / closing circuit RE1 has bypass relays 73 and 74, which are, for example, normally closed mechanical relays. The bypass relays 73 and 74 are provided in a state of being connected in parallel to each other on the bypass path B1.

  One end of the bypass path B2 is connected to the connection point N1 on the electric path L1, and the other end is connected to the output terminal P3. A bypass switching circuit RE2 is provided in the bypass path B2. The bypass switching circuit RE2 has bypass relays 75 and 76 formed of, for example, normally closed mechanical relays, and these bypass relays 75 and 76 are provided in a state of being connected in parallel with each other on the bypass path B2. The bypass path B2 is provided to bypass the switches 21 and 71 on the power supply path between the electric load 15 and the rotating electric machine 70. In the present embodiment, the bypass switching circuits RE1 and RE2 correspond to a “bypass switching unit”, the bypass relays 73 and 75 correspond to a “first switch unit”, and the bypass relays 74 and 76 correspond to a “second switch unit”. Equivalent to.

  Here, in the IG ON state, when an open abnormality (normally OFF abnormality) occurs in the switch 21, all the switches 21, 22, 71, 72 are turned off, and the bypass relays 73 to 76 are closed. Is done. Thereby, electric power can be supplied from the rotary electric machine 70 to the lead storage battery 11 and the electric load 15 through the bypass paths B1 and B2. Further, power supply (including dark current supply when the IG is off) from the lead storage battery 11 to the electric load 15 is enabled through the bypass paths B1 and B2.

  The bypass relays 73 and 74 provided in the bypass opening / closing circuit RE1 and the bypass relays 75 and 76 provided in the bypass opening / closing circuit RE2 have vibration conditions different from each other, similarly to the above-described bypass relays 23 and 24 (see FIG. 1). It has become. Specifically, in the circuit board on which the bypass relays 73 to 76 are mounted, the bypass relays 73 and 74 of the bypass opening / closing circuit RE1 are mounted at positions different from each other at a distance from the board fixing portion, and the bypass opening / closing is performed. The bypass relays 75 and 76 of the circuit RE2 are mounted at positions different from each other from the substrate fixing portion.

  FIG. 9 is a system configuration diagram of the present embodiment related to the configuration shown in FIG. In FIG. 9, a part of the configuration of FIG. 8 is changed, and the changed part will be described below.

  As shown in FIG. 9, the lead storage battery 11 and the starter 13 are connected to the output terminal P1 of the battery unit U, the rotating electric machine 70 is connected to the output terminal P2, and the electric load 15 is connected to the output terminal P3. The electric load 14 is connected to the output terminal P4.

  In the battery unit U, a bypass switching circuit RE1 having bypass relays 73 and 74 connected in parallel is provided in the bypass path B1 as in FIG. Further, unlike FIG. 8, the bypass path B2 has one end connected to the output terminal P5 and the other end connected to a connection point N4 on the electric path L3. Then, a bypass switching circuit RE2 having bypass relays 75 and 76 connected in parallel is provided in the bypass path B2, as in FIG.

  Here, in the IG ON state, when an open abnormality (normally OFF abnormality) occurs in the switch 21, all the switches 21, 22, 71, 72 are turned off, and the bypass relays 73 to 76 are closed. Is done. Thereby, electric power can be supplied from the rotary electric machine 70 to the lead storage battery 11 and the electric load 15 through the bypass paths B1 and B2. Further, power supply (including dark current supply when the IG is off) from the lead storage battery 11 to the electric load 15 is enabled through the bypass paths B1 and B2.

  In the power supply system of FIGS. 8 and 9 as well, the bypass relays 73 to 76 of the bypass switching circuits RE1 and RE2 are provided in two parallel arrangements, so that the allowable current of each of the bypass switching circuits RE1 and RE2 can be increased. Thus, components can be protected by the bypass switching circuits RE1 and RE2. As a result, the power distribution in the power supply system can be optimized. In addition, the restriction on the power generated by the rotating electric machine 70 can be eased.

  Further, the bypass relays 73 and 74 provided in the bypass switching circuit RE1 and the bypass relays 75 and 76 provided in the bypass switching circuit RE2 are configured to have different vibration conditions, respectively. Inconveniences such as simultaneous opening without any problem are less likely to occur. Therefore, the operation of the bypass switching circuits RE1 and RE2 can be optimized.

(Other embodiments)
The above embodiment may be modified, for example, as follows.

  The following configuration may be employed in each of the bypass relays 23 and 24 of the bypass opening / closing circuit RE so that the vibration conditions when vibration occurs are different from each other. For example, in each of the bypass relays 23 and 24, the moving direction of the movable contact with respect to the circuit board 63 is made different from each other. Specifically, the bypass relay 23 having the configuration shown in FIG. 2 and the bypass relay 24 having the configuration shown in FIG. 10 are used. In the bypass relay 23 shown in FIG. 2, the moving direction of the movable contact is up and down (the direction orthogonal to the board surface), and in the bypass relay 23 shown in FIG. Parallel directions). Since the configuration of the bypass relay 23 shown in FIG. 2 has been described, an example of the configuration of the bypass relay 24 will be described here.

  As shown in FIG. 10, the bypass relay 24 has a fixed contact 81 and a movable contact 83 provided at the tip of a movable iron piece 82 as a movable part. The movable iron piece 82 is urged by a return spring 84 in the left direction in the figure, that is, in a direction in which the movable contact 83 is pressed against the fixed contact 81. A coil 85 is provided near the movable iron piece 82. In terms of the relationship with the board K (corresponding to the circuit board 63), the fixed contact 81 and the movable contact 83 are arranged side by side in a direction parallel to the board surface, and the movable contact 83 Is displaced to the left or right along the substrate K. In terms of the correspondence with the bypass relay 24 shown in FIG. 1, the switches 24b of FIG. 1 are constituted by the respective contacts 81 and 83, and the coil 24a is constituted by the coil 85.

  When the bypass relay 23 having the configuration shown in FIG. 2 and the bypass relay 24 having the configuration shown in FIG. 10 are used, the moving directions of the movable contacts with respect to the circuit board 63 are different between the bypass relays 23 and 24. When a vibration in a certain direction is applied to the bypass relays 23, the possibility that the contacts are unintentionally opened and closed differs for each of the bypass relays 23 and 24. For example, when vibration occurs in a direction perpendicular to the board surface of the circuit board 63, unintended opening and closing of contacts is less likely to occur in the bypass relay 24 than in the bypass relay 23. With this configuration, unintended opening of the bypass relays 23 and 24 at the same time due to vibration is suppressed, and the operation of the bypass opening / closing circuit RE can be optimized.

  The moving direction of the movable contact in each of the bypass relays 23 and 24 may be different from each other, and the direction is not limited to the direction orthogonal to the direction perpendicular to the substrate surface. The moving directions of the movable contacts may be different from each other in directions parallel to the substrate surface.

  When the bypass relays 23 and 24 having different moving directions of the movable contact are used, as shown in FIG. 7, the circuit board 63 may have different distances from the predetermined fixed portion 65A, or may have different distances. May be the same as each other from the fixing portion 65A. Further, on the premise that the separation distance from the predetermined fixing portion 65A in the circuit board 63 is different from each other, it is also possible to use the bypass relays 23 and 24 having the configuration of FIG.

In addition to or instead of making the moving directions of the movable contacts different from each other, each of the bypass relays 23 and 24 may have at least one of the following configurations.
(1) In the bypass relays 23 and 24, the lengths of the movable iron pieces are different.
(2) In the bypass relays 23 and 24, the weight of the movable iron piece is different.
The length of the movable iron piece may be different in the length from the fulcrum to the rotation tip (movable length) of the movable iron piece.

  By making at least one of the length and the weight of the movable iron piece different, it is possible to make the bypass relays 23 and 24 have different vibration conditions, and the bypass relays 23 and 24 are simultaneously opened and closed unintentionally. Can be suppressed.

  A vibration damping unit for damping vibration may be added to the circuit board 63 and the bypass relays 23 and 24. For example, a configuration in which a vibration damping sheet as a vibration damping portion is provided on the fixed portion 65 of the circuit board 63, or a vibration absorbing portion (bending portion) is provided at a coupling terminal portion coupled to the circuit board 63 in the bypass relays 23 and 24. Is provided.

  The bypass relays 23 and 24 may be fixed to another position other than on the circuit board. For example, the bypass relays 23 and 24 are fixed to the storage case of the battery unit U, and then the bypass relays 23 and 24 and the circuit board 63 are electrically connected. However, in this case as well, vibration conditions when vibration occurs in each of the bypass relays 23 and 24 are different from each other, as described above.

  FIG. 11 is a circuit diagram showing a configuration in which a bypass relay (relay module) and a semiconductor switching element are provided in parallel as a switch unit in the bypass switching circuit RE.

  In FIG. 11, a switch 21 is provided in an electric path L1 between the lead storage battery 11 and the lithium ion storage battery 12, and a bypass path Lb bypassing the switch 21 is provided. The bypass path Lb has a normally-closed bypass. A relay 91 and a semiconductor switching element 92 are provided in parallel. The bypass relay 91 includes a coil 91a that is excited by energization, and a switch 91b that is opened and closed by a movable contact that moves according to the excitation of the coil 91a. In this case, when the IG is on, both the bypass relay 91 and the semiconductor switching element 92 are opened, and in such a state, the bypass path Lb is cut off. When the IG is off, the bypass relay 91 is closed and the semiconductor switching element 92 is open (off). In such a state, dark current is supplied through the bypass relay 91. When the fail-safe process is performed with the IG on, both the bypass relay 91 and the semiconductor switching element 92 are closed. In such a state, the supply of the generated current or the like via the bypass relay 91 and the semiconductor switching element 92 is performed. Done.

  In the configuration of FIG. 11, it is possible to obtain the effect of increasing the allowable current of the bypass switching circuit RE, and to suppress unintended opening of the bypass switching circuit RE. In particular, since the configuration uses the normally-closed bypass relay 91 and the semiconductor switching element 92, the dark current can be supplied using only the normally-closed bypass relay 91 when the power supply system is stopped. In addition, when an abnormality occurs in the operating state of the power supply system, by using both the bypass relay 91 and the semiconductor switching element 92, it is possible to prevent the bypass switching circuit RE from being unintentionally opened due to vibration.

  In the configuration of FIG. 1, the control unit 30 may individually control the opening and closing of the bypass relays 23 and 24 of the bypass switching circuit RE. That is, the bypass relays 23 and 24 do not need to be opened and closed at the same timing as each other. For example, when performing the fail-safe process, the closing timings may be different from each other. Specifically, for example, the relays having different relay capacities (allowable currents) are used as the bypass relays 23 and 24. At the beginning of the fail-safe processing, the bypass relay having the larger relay capacity is closed in response to the rush current, Thereafter, the bypass relay having the smaller relay capacity is closed in accordance with the increase in the energizing current.

  Here, it is conceivable that the weights of the bypass relays 23 and 24 are different due to a difference in relay capacity and the like. In addition, it is considered that the rigidity of the circuit board 63 near the fixed portion 65A is high, and the rigidity far from the fixed portion 65A is low. In this case, the heavier bypass relay may be provided on the circuit board 63 on the side closer to the fixing portion 65A, and the lighter bypass relay may be provided on the circuit board 63 on the side farther from the fixing portion 65A. Thereby, the magnitude of the vibration over the entire substrate can be made constant.

  The normally open bypass relays 23 and 24 may be used instead of the normally closed bypass relays as the two parallel switches in the bypass switching circuit RE. Further, it is also possible to adopt a configuration in which a semiconductor switching element is used as each of the two parallel switch units in the bypass switching circuit RE.

  -As a switch 22 provided in the electric path L2 of the battery unit U, a relay module having a coil and a switch may be provided. In this case, it is preferable that two normally-open relays are used as the switches 22 and that the two relays are provided in parallel. The switch 22 is turned on in accordance with the turning on of the IG, and the state is maintained, so that it is not necessary to consider the contact sound during the running of the vehicle. Also in the present configuration, by making the vibration conditions different for the two parallel relay modules, it is possible to suppress unintentional simultaneous opening and closing of each relay module due to vehicle vibration.

  In the above embodiment, the lead storage battery 11 is provided as the first storage battery, and the lithium ion storage battery 12 is provided as the second storage battery. However, this may be changed. As the second storage battery, a high-density storage battery other than the lithium-ion storage battery 12, for example, a nickel-metal hydride battery may be used. In addition, the same storage battery (for example, a lead storage battery or a lithium ion storage battery) can be used as the first storage battery and the second storage battery.

  In the bypass opening / closing section, a switch section (for example, a bypass relay) can be provided in three parallel. When each switch section is configured by a mechanical bypass relay, the vibration conditions of these bypass relays may be different from each other.

  -The power supply system to which the present invention is applied can be used for purposes other than vehicles.

  11: lead storage battery (first storage battery), 12: lithium ion storage battery (second storage battery), 16: generator, 21: switch (energization control switch), 23, 24: bypass relay (first and second switch sections) , RE: bypass switching circuit (bypass switching unit).

Claims (4)

A power supply circuit device applied to a power supply system in which a first storage battery (11) and a second storage battery (12) are connected in parallel to a generator (16, 70),
An energization control switch (21, 71) that is provided on a power supply path (L1) to which power of the generator and the first storage battery is supplied in the power supply system, and that sets the power supply path to an energized or de-energized state;
A bypass opening / closing section (RE, RE1, RE2) that is provided in a bypass path (Lb, B1, B2) that bypasses the energization control switch and that energizes or de-energizes the bypass path;
With
The bypass opening / closing section has a first switch section (23, 73, 75 ) and a second switch section (24, 74, 76 ) provided in parallel with each other ,
The first switch section and the second switch section are closed when the energization control switch is opened, and move according to the coils (23a, 24a) that are excited by energization and the excitation of the coils. A first bypass relay (23) and a second bypass relay (24) each having a switch (23b, 24b) opened and closed by a movable contact,
A circuit board (63) on which the first bypass relay and the second bypass relay are mounted, the circuit board being fixed to a fixing target (61) by a board fixing part (65);
The first bypass relay and the second bypass relay are mounted at different positions on the circuit board from each other at a distance from the board fixing portion, so that power sources having different vibration conditions when vibration occurs are different from each other. Circuit device. Before Machinery circuit board is provided at a position facing the battery module (61) constituting the second battery,
The opposing portion opposed to the battery module in the circuit board, the power supply circuit device of claim 1, wherein the first bypass relay and the second bypass relay is mounted. A power supply circuit device applied to a power supply system in which a first storage battery (11) and a second storage battery (12) are connected in parallel to a generator (16, 70),
An energization control switch (21, 71) that is provided on a power supply path (L1) to which power of the generator and the first storage battery is supplied in the power supply system, and that sets the power supply path to an energized or de-energized state;
A bypass opening / closing section (RE, RE1, RE2) that is provided in a bypass path (Lb, B1, B2) that bypasses the energization control switch, and that energizes or de-energizes the bypass path;
With
The bypass opening / closing section has a first switch section (23, 73, 75 ) and a second switch section (24, 74, 76 ) provided in parallel with each other ,
The first switch section and the second switch section are closed when the energization control switch is opened, and move according to the coils (23a, 24a) that are excited by energization and the excitation of the coils. A first bypass relay (23) and a second bypass relay (24) each having a switch (23b, 24b) opened and closed by a movable contact,
The first bypass relay and the second bypass relay have different vibration conditions when vibration occurs,
A circuit board (63) on which the first bypass relay and the second bypass relay are mounted, the circuit board being provided at a position facing a battery module (61) constituting the second storage battery;
A power supply circuit device , wherein the first bypass relay and the second bypass relay are mounted on a portion of the circuit board facing the battery module . The first bypass relay and the second bypass relay are different from each other in at least one of a moving direction of the movable contact, a movable length of a movable portion provided with the movable contact, and a weight of the movable portion. Item 4. The power supply circuit device according to any one of Items 1 to 3 .

Images