Computer Systems

Abstract

To provide a computer system that reduces the power consumption of a computer installed in a vehicle.SOLUTION: A computer system installed in a vehicle includes a first computer (video media control unit) 105a, a second computer (central control unit) 105b, a third computer (power distribution control unit) 105c, and a secondary battery 15. The first computer is permitted to participate in grid computing, the second computer is not permitted to participate in grid computing, and the third computer manages charging of the secondary battery, and when the secondary battery is being charged, power supply to the second computer is stopped, and a part of the power supplied for charging the secondary battery is supplied to the first computer.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a computer system installed in a vehicle. [Background technology]

[0002] Some vehicles are equipped with a computer capable of grid computing (see, for example, Patent Document 1). In the example of Patent Document 1, when a user turns off the engine or power of the vehicle, a signal indicating that the vehicle is able to participate in grid computing is sent to a management server. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-160661 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 does not disclose anything about power consumption management (especially reduction of power consumption) of devices while participating in grid computing.

[0005] An object of the present disclosure is to reduce the power consumption of on-board computers in vehicles. [Means for solving the problem]

[0006] A first aspect is a computer system mounted on a vehicle, a first computer; a second computer; and a third computer; and A secondary battery; Equipped with the first computer is allowed to participate in grid computing; the second computer is not permitted to participate in the grid computing; The third computer manages charging of the secondary battery, and while the secondary battery is being charged, stops power supply to the second computer and supplies a portion of the power supplied for charging the secondary battery to the first computer. The computer system is characterized by:

[0007] In the first aspect, while the secondary battery is being charged, power is not supplied to the second computer that does not participate in grid computing. In the computer system of the first aspect, power consumption is reduced.

[0008] A second aspect is the computer system of the first aspect, The first computer acts as the third computer. The computer system is characterized by:

[0009] In the second aspect, there is no need to provide a third computer separately.The computer system of the second aspect further reduces power consumption.

[0010] A third aspect is a computer system according to the first or second aspect, the vehicle includes a cooling device that cools the first computer and the secondary battery; the second computer has a function of controlling the operation of the cooling device; The first computer controls the cooling device in place of the second computer while the secondary battery is being charged, and causes the cooling device to cool the first computer. The computer system is characterized by:

[0011] In the third aspect, the first computer is cooled even when the second computer that controls the operation of the cooling device is stopped.

[0012] A fourth aspect is a computer system according to any one of the first to third aspects, a DC power supply unit that converts an input AC voltage into a DC voltage and outputs the DC voltage; a distributor having at least one input terminal and a plurality of output terminals, which outputs a DC voltage input from the input terminal to a designated output terminal; a step-down circuit that steps down an input DC voltage and outputs the stepped-down voltage; Equipped with The secondary batteries include two types of batteries, a first secondary battery and a second secondary battery, which have different output voltages from each other; The output voltage of the first secondary battery is higher than the output voltage of the second secondary battery, an input terminal of the distributor is connected to an output terminal of the DC power supply unit; the distributor has one output terminal connected to the input terminal of the step-down circuit and another output terminal connected to the first secondary battery; The output terminal of the step-down circuit is connected to the first computer. The computer system is characterized by:

[0013] In a fourth embodiment, the power is distributed by a distributor.

[0014] A fifth aspect is the computer system of the fourth aspect, The third computer has a control mode in which the output of the DC power supply unit is supplied to the first secondary battery by controlling the distributor. The computer system is characterized by:

[0015] In the fifth aspect, the first secondary battery is charged using power from the DC power supply unit.

[0016] A sixth aspect is the computer system of the fourth or fifth aspect, The third computer has a control mode in which the output of the DC power supply unit is stepped down by the step-down circuit by controlling the distributor, and the output of the step-down circuit is supplied to the first computer. The computer system is characterized by:

[0017] In a sixth aspect, power is supplied to the first computer using power obtained from the DC power supply unit.

[0018] A seventh aspect is the computer system of any one of the fourth to sixth aspects, The third computer has a control mode that causes the power of the second secondary battery to be supplied to the first computer when the power of the second secondary battery is equal to or greater than a predetermined value. The computer system is characterized by:

[0019] In the seventh aspect, the power obtained from the second secondary battery is used to supply power to the first computer.

[0020] An eighth aspect is a computer system according to any one of the fourth to seventh aspects, an input terminal of the distributor is connected to an output terminal of the first secondary battery; an output terminal of the step-down circuit is connected to the second secondary battery; The third computer has a control mode in which the output of the first secondary battery is stepped down by the step-down circuit by controlling the distributor, and the output of the step-down circuit is supplied to the second secondary battery. The computer system is characterized by:

[0021] In the eighth aspect, the second secondary battery is charged using power obtained from the first secondary battery.

[0022] A ninth aspect is the computer system of any one of the fourth to eighth aspects, an input terminal of the distributor is connected to an output terminal of the first secondary battery; The third computer has a control mode in which the output of the first secondary battery is stepped down by the step-down circuit by controlling the distributor, and the output of the step-down circuit is supplied to the first computer. The computer system is characterized by:

[0023] In a ninth aspect, power is supplied to the first computer using power obtained from the first secondary battery. [Effects of the Invention]

[0024] According to the present disclosure, it is possible to reduce the power consumption of a computer installed in a vehicle. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a diagram illustrating an example of a system configuration according to a first embodiment. [Figure 2] FIG. 1 is a diagram illustrating the concept of grid computing. [Figure 3] FIG. 1 is a block diagram illustrating a configuration of a vehicle. [Figure 4] FIG. 2 is a block diagram showing the configuration of a calculation device. [Figure 5] 10 is a flowchart of a process when a normal charger is connected to a vehicle. [Figure 6] 10 is a flowchart of a process in a first mode. [Figure 7] 10 is a flowchart of a process in a second mode. [Figure 8] 10 is a flowchart of a process in a third mode. [Figure 9] FIG. 10 is a block diagram showing the configuration of a vehicle according to a second embodiment. [Figure 10] 10 is a table illustrating power control when a vehicle is connected to a normal charger. [Figure 11] 10 is a table illustrating power control when the vehicle is not connected to a normal charger. DETAILED DESCRIPTION OF THE INVENTION

[0026] [Embodiment 1] A computer system according to this embodiment will be described below with reference to the drawings. The computer system of this embodiment is mounted on a vehicle connected to system 1 (described later). First, system 1 will be described. The same or corresponding parts in the drawings will be designated by the same reference numerals, and their description will not be repeated.

[0027] System 1 1 illustrates an example of the configuration of a system 1 according to this embodiment. The system 1 includes a plurality of vehicles 10, a plurality of user terminals 20, a client server 30, a facility server 40, and a management server 50.

[0028] The client server 30 is owned by a client. The client requests the management server 50 to calculate job data. Examples of such clients include companies, research institutes, and educational institutions. The facility server 40 is owned by a facility. Users visit the facility. The users can make reservations to visit the facility. Examples of such facilities include stadiums, theaters, supermarkets, restaurants, accommodation facilities, and retail stores. The management server 50 manages the operation (job allocation, etc.) of the system 1 in which grid computing is configured. The management server 50 is owned by the business operator that operates the system 1.

[0029] These components can communicate with each other via a communication network 5. Each vehicle 10 is equipped with a computing device 105. Note that the system 1 may be provided with a plurality of client servers 30. Similarly, the system 1 may be provided with a plurality of facility servers 40.

[0030] [Grid Computing] Fig. 2 is a diagram illustrating the concept of grid computing. As shown in Fig. 2, grid computing is configured in system 1 by a plurality of computing devices 105. In system 1, a process (grid computing process) is performed in which an available computing device 105 among the plurality of computing devices 105 processes job data.

[0031] When the computing power of the arithmetic device 105 is needed in the vehicle 10, the arithmetic device 105 enters an operating state. That is, the computing power of the arithmetic device 105 is utilized. For example, when the computing power of the arithmetic device 105 is needed for driving control of the vehicle 10, the arithmetic device 105 enters an operating state.

[0032] On the other hand, when the computing power of the computing device 105 is no longer needed in the vehicle 10, the computing device 105 is put into a stopped state. That is, in the vehicle 10, the computing power of the computing device 105 is not used.

[0033] Here, in the vehicle 10, when the computing power of the computing device 105 is not needed, the computing power of the computing device 105 is provided for grid computing processing. This makes it possible to effectively use the computing power of the computing device 105.

[0034] 〔vehicle〕 The vehicle 10 (computer system) is owned by a user. The user may drive the vehicle 10. In this example, the vehicle 10 is a four-wheeled automobile. Examples of the vehicle 10 include an electric vehicle, a plug-in hybrid vehicle, and the like.

[0035] Fig. 3 is a block diagram illustrating the configuration of a vehicle. As shown in Fig. 3, a vehicle 10 includes an actuator 11, a sensor 12, a motor 13, secondary batteries 14 and 15, an inverter circuit 16, an input unit 101, an output unit 102, a communication unit 103, a storage unit 104, a computing device 105, a power conversion device 106, a DC / DC converter 107, and a cooling device 108.

[0036] The voltage of the secondary battery 14 is several hundred volts (for example, 200 V). The power of the secondary battery 14 is input to an inverter circuit 16. The secondary battery 14 may be charged either normally or quickly. Although both a normal charger and a quick charger are shown in FIG. 3, this is only for the sake of convenience. The vehicle 10 is not connected to both chargers at the same time.

[0037] The inverter circuit 16 converts the input DC voltage into an AC voltage of a predetermined frequency and a predetermined voltage and outputs the AC voltage. The output (AC voltage) of the inverter circuit 16 is supplied to a motor (motor 13) for driving the vehicle.

[0038] The voltage of the secondary battery 15 is 12 V. The power of the secondary battery 15 is supplied to a computer (a central control unit 105b described later) and the like.

[0039] The actuator 11 includes a steering actuator, a braking actuator, etc. An example of a braking actuator is a brake, and an example of a steering actuator is a steering wheel.

[0040] The sensors 12 acquire various types of information used to control the vehicle 10. Examples of the sensors 12 include an exterior camera, an interior camera, radar, a vehicle speed sensor, an acceleration sensor, a yaw rate sensor, an accelerator opening sensor, a steering sensor, and a brake oil pressure sensor. The exterior camera captures images outside the vehicle. The interior camera captures images inside the vehicle. The radar searches outside the vehicle.

[0041] The input unit 101 inputs information and data. Examples of the input unit 101 include an operation unit that is operated to input information corresponding to the operation, a camera that inputs an image showing information, and a microphone that inputs audio showing information. Examples of the operation unit include operation buttons and touch sensors of a car navigation device. The information and data input to the input unit 101 are sent to the calculation device 105.

[0042] The output unit 102 outputs information and data. Examples of the output unit 102 include a display unit that outputs an image representing information, and a speaker that outputs sound representing information. An example of a display unit is the display of a car navigation device. An example of a speaker is the speaker of a car navigation device.

[0043] The communication unit 103 transmits and receives information and data. The information and data received by the communication unit 103 are sent to the arithmetic device 105. In this embodiment, the user can instruct (send) the communication unit 103 to specify an operation mode (described later) to be used when connected to a standard charger. In this example, the user can send the instruction to the communication unit 103 from the user terminal 20 via wireless communication.

[0044] The storage unit 104 stores information and data.

[0045] The arithmetic unit 105 controls each part of the vehicle 10. The arithmetic unit 105 will be described in detail later.

[0046] The power conversion device 106 has a function of supplying DC power. The power conversion device 106 includes an AC / DC converter circuit and a DC / DC converter circuit to output a DC voltage. For example, the power conversion device 106 supplies power (DC) for charging the secondary battery 14. The output voltage of the power conversion device 106 is a DC voltage required for charging the secondary battery 14. Specifically, the output voltage of the power conversion device 106 is several hundred volts (for example, 200 V).

[0047] During normal charging, the power conversion device 106 is connected to a normal charger. The normal charger is, for example, a commercial power supply. When power is supplied to the power conversion device 106, the power is supplied to a predetermined part of the arithmetic device 105 (such as the power distribution control unit 105c described below). The operation of the power conversion device 106 is controlled by the power distribution control unit 105c.

[0048] DC / DC converter 107 outputs a DC voltage obtained by stepping down the output voltage of power conversion device 106. The output of DC / DC converter 107 is approximately 12 V. The output destination of DC / DC converter 107 is determined under the control of power distribution control unit 105c (described later). For example, the output of DC / DC converter 107 is supplied to video media control unit 105a (described later) or to secondary battery 15 under the control of power distribution control unit 105c (described later).

[0049] The cooling device 108 cools the arithmetic device 105 and the secondary battery 14. Specifically, the cooling device 108 water-cools the secondary battery 14. The cooling device 108 also conditions the air inside the vehicle (compartment). That is, the cooling device 108 has a water-cooling function and an air-conditioning function. The cooling device 108 uses these functions to water-cool part of the arithmetic device 105 and air-cool part of it.

[0050] The cooling device 108 is equipped with a condenser, an evaporator, a chiller, a pump, etc. (all of which are not shown) to achieve water cooling and air conditioning functions. The operation of the cooling device 108 is controlled by the computing device 105.

[0051] [Details of the arithmetic unit 105] 4 is a block diagram showing the configuration of the arithmetic device 105. The arithmetic device 105 controls each part of the vehicle 10. The arithmetic device 105 includes a plurality of control units (computers). In this example, the arithmetic device 105 includes, as control units, a video media control unit 105a, a central control unit 105b, a power distribution control unit 105c, a remaining amount management unit 105d, and a driving assistance unit 105e. Some of these computers are permitted to participate in grid computing, while others are not permitted to participate.

[0052] The video media control unit 105a (first computer) is equipped with an MPU (Media Processing Unit). The MPU is a device that includes a processor that processes image data. The user may choose whether or not to install the video media control unit 105a when purchasing the vehicle 10.

[0053] The video media control unit 105a processes the video captured by the in-vehicle camera and the video (image data) captured by the external camera by executing a predetermined program by the MPU. By executing the program, the MPU can, for example, automatically edit the image data. Note that the video media control unit 105a may communicate with the central control unit 105b and the driving assistance unit 105e via a local area network (such as Ethernet).

[0054] The MPU is a processor with relatively high computing power. The video media control unit 105a (MPU) is allowed to participate in grid computing.

[0055] The electronic components of video media control unit 105a are cooled by cooling device 108. For example, certain semiconductor elements that make up video media control unit 105a are water-cooled by cooling device 108. Cool air is introduced into the housing that houses video media control unit 105a from cooling device 108. In other words, video media control unit 105a is air-cooled by cooling device 108.

[0056] By executing the program, the video media control unit 105a is able to control the cooling device 108. The video media control unit 105a can adjust the capacity of the cooling device 108 in order to cool itself.

[0057] The central control unit 105b (second computer) includes one or more CPUs (Central Processing Units). The central control unit 105b controls the vehicle 10 while it is running by having the CPU execute a predetermined program. In principle, the central control unit 105b does not operate while the vehicle is parked.

[0058] For example, the central control unit 105b controls the actuators (motor 13) of the drive system in response to various information obtained by the sensors 12. The central control unit 105b also controls the cooling device 108 (such as controlling the air conditioning inside the vehicle). The central control unit 105b is not permitted to participate in grid computing. Note that the CPU and other components of the central control unit 105b are cooled by the cooling device 108, just like the video media control unit 105a.

[0059] The power distribution control unit 105c (third computer) includes a CPU. The CPU executes a predetermined program, and the power distribution control unit 105c distributes power among the power electronics devices 106 (details will be described later). The power distribution control unit 105c is not permitted to participate in grid computing.

[0060] The remaining capacity management unit 105d includes a CPU. The CPU executes a predetermined program to allow the remaining capacity management unit 105d to collect information on the remaining capacity of the secondary battery 14 (hereinafter referred to as remaining capacity information). Specifically, the remaining capacity management unit 105d collects the remaining capacity information of the secondary battery 14 based on the voltage of the secondary battery 14. The remaining capacity information may also be referred to as the state of charge of the secondary battery 14. Note that the remaining capacity management unit 105d is not permitted to participate in grid computing.

[0061] The driving support unit 105e includes one or more CPUs. The CPUs execute predetermined programs to control the various functions of the preventive safety driving support. In principle, the driving support unit 105e does not operate while the vehicle is parked.

[0062] For example, the driving support unit 105e performs following-up driving of the vehicle ahead, situation evaluation related to damage mitigation braking, brake control, etc. The driving support unit 105e is not permitted to participate in grid computing.

[0063] <<Example of operation>> When the vehicle 10 is connected to a normal charger, the following three modes can be selected as the operating mode.

[0064] (1) A mode (first mode) in which both the secondary battery 14 is charged and the device participates in grid computing.

[0065] (2) A mode in which the secondary battery 14 is charged but the device does not participate in grid computing (second mode).

[0066] (3) A mode in which the secondary battery 14 is not charged and the device participates in grid computing (third mode).

[0067] 5 is a flowchart of the process when a standard charger is connected to vehicle 10. This flow starts when the user connects vehicle 10 to the standard charger (step (S1-1)). When the standard charger is connected, power conversion device 106 in vehicle 10 starts up (step (S1-2)). This starts up power distribution control unit 105c.

[0068] Furthermore, the user sends a command specifying an operation mode (one of the first to third modes) to the communication unit 103 via the user terminal 20. The power distribution control unit 105c analyzes the user's command (step (S1-3)) and determines the operation mode (step (S1-4)). The power distribution control unit 105c controls processing in the determined operation mode.

[0069] [First mode] 6 is a flowchart of the process in mode 1. In mode 1, charging of the secondary battery 14 and participation in grid computing are carried out.

[0070] -Grid Computing- The power conversion device 106 outputs DC power to the DC / DC converter 107. When the power conversion device 106 outputs power to the DC / DC converter 107, the DC / DC converter 107 starts up (step (S2-1)). The power distribution control unit 105c controls the DC / DC converter 107 to supply power to the video media control unit 105a. This starts up the video media control unit 105a (MPU) (step (S2-2)).

[0071] Furthermore, the power distribution control unit 105c turns off the power supply to the central control unit 105b and the driving support unit 105e. Specifically, the power distribution control unit 105c disconnects the secondary battery 15 from the circuit. This prevents power from being consumed by the central control unit 105b and the driving support unit 105e.

[0072] The video media control unit 105a (MPU) participates in grid computing and performs the requested calculation (step (S2-3)). After the requested calculation processing is completed, the video media control unit 105a checks the settings related to the grid computing processing (step (S2-4)). Here, there are two types of settings related to the grid computing processing: "wait for the next job request" and "end without waiting for the next job." This setting can be made by the user via the user terminal 20.

[0073] For example, if the setting for grid computing processing is "wait for the next job request," the video media control unit 105a enters a waiting state (step (S2-5)). Even while the video media control unit 105a is in a waiting state, power is supplied to the video media control unit 105a.

[0074] If the setting for grid computing processing is "end without waiting for the next job," video media control unit 105a notifies a predetermined location of the completion of the computation (step (S2-6)). For example, video media control unit 105a notifies power distribution control unit 105c of the completion of the computation. In response, power distribution control unit 105c controls DC / DC converter 107 to stop power supply to video media control unit 105a (step (S2-7)). This causes video media control unit 105a to stop operating.

[0075] -charging- When the first mode is started, the power distribution control unit 105c starts up the secondary battery 14 (step (S2-8)). "Starting up the secondary battery 14" means connecting the secondary battery 14 to a charging circuit (the same applies below). In this example, the power distribution control unit 105c operates the relay R1 (FIG. 4) between the secondary battery 14 and the power conversion device 106 to connect the secondary battery 14 and the power conversion device 106. The power distribution control unit 105c also causes the DC / DC converter 107 to supply power to the remaining power management unit 105d. This starts up the remaining power management unit 105d (step (S2-9)).

[0076] When the secondary battery 14 is started up, the secondary battery 14 is charged (step (S2-10)). While the secondary battery 14 is being charged, the remaining battery capacity management unit 105d monitors the charging state (specifically, the voltage) at predetermined intervals. The power distribution control unit 105c determines whether charging has finished based on the result of monitoring by the remaining battery capacity management unit 105d (step (S2-11)).

[0077] If charging is complete, the power distribution control unit 105c stops the secondary battery 14 (step (S2-12)). "Stopping the secondary battery 14" means disconnecting the secondary battery 14 from the charging circuit (the same applies below). The power distribution control unit 105c operates the relay R1 (see FIG. 4) between the secondary battery 14 and the power conversion device 106 to disconnect the secondary battery 14 from the power conversion device 106.

[0078] After charging is completed, the power distribution control unit 105c waits for the video media control unit 105a (MPU) to finish its calculations (step (S2-13)). When the MPU's calculations are finished, the power distribution control unit 105c stops the remaining capacity management unit 105d (step (S2-14)).

[0079] The power distribution control unit 105c stops the DC / DC converter 107 (step (S2-15)). Specifically, the power distribution control unit 105c stops the power supply to the DC / DC converter 107. Furthermore, the power distribution control unit 105c stops the power conversion device 106 (step (S2-16)). Specifically, the power distribution control unit 105c stops the power supply to the power conversion device 106.

[0080] The power distribution control unit 105c notifies the user of the completion of charging (step (S2-17)). In this example, the power distribution control unit 105c sends the notification to the user via the communication unit 103.

[0081] In the first mode, the video media control unit 105a operates while the central control unit 105b is stopped. In this state, the video media control unit 105a manages the cooling device 108 to maintain its own temperature (video media control unit 105a) within an operable temperature range.

[0082] [Second mode] 7 is a flowchart of the process in the second mode. In the second mode, charging is performed to the secondary battery 14. In the second mode, participation in grid computing is not performed.

[0083] When the power conversion device 106 outputs power to the DC / DC converter 107, the DC / DC converter 107 starts up (step (S3-1)). When the DC / DC converter 107 starts up, the power distribution control unit 105c causes the DC / DC converter 107 to supply power to the remaining amount management unit 105d. This starts up the remaining amount management unit 105d (step (S3-2)).

[0084] The power distribution control unit 105c does not supply power to the video media control unit 105a and the driving support unit 105e. Similarly, the power distribution control unit 105c does not supply power to the central control unit 105b.

[0085] The power distribution control unit 105c starts up the secondary battery 14 (step (S3-3)). Once the secondary battery 14 has started up, the secondary battery 14 is charged (step (S3-4)). While the secondary battery 14 is being charged, the remaining battery capacity management unit 105d monitors the charging state at predetermined intervals. The power distribution control unit 105c determines whether charging has finished based on the results of monitoring by the remaining battery capacity management unit 105d (step (S3-5)).

[0086] If charging is complete, the power distribution control unit 105c stops the secondary battery 14 (step (S3-6)). The power distribution control unit 105c also stops the remaining battery level management unit 105d (step (S3-7)). Next, the power distribution control unit 105c stops the DC / DC converter 107 (step (S3-8)).

[0087] When the secondary battery 14, remaining capacity management unit 105d, and DC / DC converter 107 have stopped, the power distribution control unit 105c notifies the user that charging has been completed (step (S3-9)). In this example, the power distribution control unit 105c sends a notification to the user via the communication unit 103. The power distribution control unit 105c also stops the power conversion device 106 (step (S3-10)).

[0088] [Third mode] 8 is a flowchart of processing in the third mode. In the third mode, participation in grid computing is performed. In the third mode, charging of the secondary battery 14 is not performed.

[0089] When power conversion device 106 outputs power to DC / DC converter 107, DC / DC converter 107 starts up (step (S4-1)). Power distribution control unit 105c controls DC / DC converter 107 to supply power to video media control unit 105a. This starts up video media control unit 105a (MPU) (step (S4-2)).

[0090] The power distribution control unit 105c does not supply power to the central control unit 105b and the driving support unit 105e.

[0091] The video media control unit 105a (MPU) participates in grid computing and performs the requested calculation (step (S4-3)). After the requested calculation processing is completed, the video media control unit 105a checks the settings related to the grid computing processing (step (S4-4)). As mentioned above, in this embodiment, there are two types of settings related to the grid computing processing: "wait for the next job request" and "end without waiting for the next job."

[0092] For example, if the setting for grid computing processing is "wait for next job request," the video media control unit 105a enters a waiting state (step (S4-5)). Even while the video media control unit 105a is in a waiting state, power is supplied to the video media control unit 105a.

[0093] Furthermore, if the setting for the grid computing process is "end without waiting for the next job," the video media control unit 105a notifies a predetermined location of the completion of the computation (step (S4-6)). For example, the video media control unit 105a notifies the power distribution control unit 105c of the completion of the computation.

[0094] Then, the power distribution control unit 105c controls the DC / DC converter 107 to stop the power supply to the video media control unit 105a, causing the video media control unit 105a (MPU) to stop operating (step (S4-7)).

[0095] The power distribution control unit 105c stops the DC / DC converter 107 (step (S4-8)). Furthermore, the power distribution control unit 105c stops the power conversion device 106 (step (S4-9)).

[0096] In the third mode, there is also a state in which the video media control unit 105a operates and the central control unit 105b is stopped. In this state, the video media control unit 105a manages the cooling device 108 to maintain its own temperature (video media control unit 105a) within an operable temperature range.

[0097] Effect of this embodiment As described above, in this embodiment, when vehicle 10 is connected to a standard charger, power is supplied only to the computers required for operation. In this embodiment, when vehicle 10 is connected to a standard charger, power is not supplied to the computers (such as central control unit 105b) enclosed by the dashed dotted line in FIG. 4. According to this embodiment, it is possible to reduce the power consumption of the computers installed in the vehicle.

[0098] Furthermore, when power supply to the central control unit 105b is stopped, the video media control unit 105a (first computer) controls the cooling device 108. This allows the present embodiment to maintain the computers participating in grid computing within an operable temperature range. As a result, the present embodiment allows for reliable execution of calculations (processing) in grid computing.

[0099] [Embodiment 2] In embodiment 2, a more specific circuit configuration of the computer system will be described. Fig. 9 is a block diagram showing the configuration of a vehicle according to embodiment 2. As shown in Fig. 9, a vehicle 10 (computer system) includes a motor 13, a battery pack 201, a secondary battery 15, an inverter circuit 16, a video media control unit 105a, a DC / DC converter 107 (step-down circuit), a cooling device 108, a charging control unit 200, a power control unit 202, a heater 203, an ECU group 204, an electrical system 205, a drive system / steering system 206, and a heating and cooling system 207.

[0100] The group of components including the secondary battery 15, inverter circuit 16, DC / DC converter 107, charging control unit 200, battery pack 201, and power control unit 202 may be called a vehicle power supply system.

[0101] The battery pack 201 includes a secondary battery 14 and a battery heater 201a. The battery heater 201a is a heater for adjusting the temperature of the secondary battery 14. The battery heater 201a receives power supply from the secondary battery 14.

[0102] Hereinafter, for convenience of explanation, the secondary battery 14 may be referred to as the first secondary battery 14. The secondary battery 15 may be referred to as the second secondary battery 15. The output voltage of the first secondary battery 14 is higher than the output voltage of the second secondary battery 15.

[0103] The charging control unit 200 manages the charging of the first secondary battery 14. During normal charging, the charging control unit 200 is connected to a normal charger. The normal charger is, for example, a commercial power source. The commercial power source is, for example, an AC power source such as single-phase 100V or single-phase 200V.

[0104] The charging control unit 200 includes, as its components, a power distribution control unit 105c (third computer), a power conversion device 106 (DC power supply unit), and a distributor 110. These components are housed in a single housing. The components of the charging control unit 200 may be mounted on the same board.

[0105] The power converter 106 is connected to a standard charger during standard charging. The power converter 106 converts input AC voltage into DC voltage and outputs the DC voltage. The power converter 106 includes a rectifier 106a, an inverter circuit 106b, a transformer 106c, and a rectifier 106d.

[0106] The rectifier 106a (AC / DC converter) rectifies the AC voltage input from the normal charger and outputs a DC voltage. The rectifier 106a can be configured with, for example, a diode bridge circuit.

[0107] The inverter circuit 106b (DC / AC conversion) converts the DC voltage output by the rectifier 106a into an AC voltage having a predetermined voltage and frequency. The output of the inverter circuit 106b is input to a transformer 106c.

[0108] The transformer 106c (booster) boosts the AC voltage output by the inverter circuit 106b. The output voltage of the transformer 106c is several hundred volts (for example, about 200V). The output of the transformer 106c is input to the rectifier 106d.

[0109] The rectifier 106d (AC / DC converter) converts the AC voltage output by the transformer 106c into a DC voltage. The output voltage of the rectifier 106d is a DC voltage (e.g., 200 V) suitable for charging the first secondary battery 14. The rectifier 106d can be configured, for example, with a diode bridge circuit.

[0110] The distributor 110 has a plurality of input terminals and a plurality of output terminals. The distributor 110 outputs (distributes) a DC voltage input from the input terminal to a specified output terminal. The distributor 110 is controlled (instructed) by a power distribution control unit 105c (third computer).

[0111] The distributor 110 can be configured with a semiconductor switch, a relay, or a DC / DC converter. In this embodiment, the distributor 110 is configured with a DC / DC converter. The distributor 110 can control not only whether or not to supply power, but also the amount of power to be supplied.

[0112] An output terminal of the power conversion device 106 (more precisely, an output terminal of the rectifier 106d) is connected to one of the input terminals of the distributor 110. An output terminal of the first secondary battery 14 is connected to another of the input terminals of the distributor 110.

[0113] One of the output terminals of the distributor 110 is connected to the input terminal of the DC / DC converter 107. The distributor 110 can selectively supply either the power from the power conversion device 106 or the power from the first secondary battery 14 to the DC / DC converter 107. This selection (control) is performed by the power distribution control unit 105c.

[0114] The first secondary battery 14 is connected to one of the other output terminals of the distributor 110. The distributor 110 can control the on / off of the power supply from the power conversion device 106 to the first secondary battery 14. This on / off control is performed by the power distribution control unit 105c.

[0115] The DC / DC converter 107 is a step-down circuit. The DC / DC converter 107 has multiple output terminals. The output voltage of each output terminal is 12 V. The DC / DC converter 107 can control the amount of power at each output terminal. The power at the output terminal of the DC / DC converter 107 may be zero (i.e., the off state).

[0116] One device (power supply destination) is connected to one output terminal of the DC / DC converter 107. In this embodiment, the power supply destinations of the DC / DC converter 107 are the video media control unit 105a, the second secondary battery 15, the power distribution control unit 105c, and the power control unit 202.

[0117] The power control unit 202 includes the functions of the remaining capacity management unit 105d. The power control unit 202 monitors the first secondary battery 14 and controls a relay (not shown) in the battery pack 201. Specifically, the power control unit 202 checks and diagnoses the temperature, current, voltage, etc. of the cells of the first secondary battery 14.

[0118] The heater 203 is a heater for air conditioning inside the vehicle and is supplied with power from the first secondary battery 14.

[0119] The ECU group 204 is a plurality of electronic control units (Electronic Control Units). The ECU group 204 includes a central control unit 105b (second computer) and a driving support unit 105e. The ECU group 204 is supplied with power from the second secondary battery 15. Similarly, the electrical system 205, the drive system / steering system 206, and the heating and cooling system 207 are also supplied with power from the second secondary battery 15.

[0120] <<Example of operation (power control)>> Power control in the vehicle 10 (computer system) will be described for the cases where the vehicle 10 is connected to a normal charger and where the vehicle 10 is not connected to a normal charger.

[0121] <When vehicle 10 is connected to a standard charger> When vehicle 10 is connected to a standard charger, power is supplied from the standard charger to charging control unit 200 (more precisely, power conversion device 106). When vehicle 10 is connected to a standard charger, the following three modes can be selected as the operating mode:

[0122] (1) A mode (first mode) in which both charging of the first secondary battery 14 and participation in grid computing are performed.

[0123] (2) A mode (second mode) in which the first secondary battery 14 is charged but the device does not participate in grid computing.

[0124] (3) A mode in which the first secondary battery 14 is not charged and the device participates in grid computing (third mode).

[0125] FIG. 10 is a table explaining power control when vehicle 10 is connected to a standard charger. In FIG. 10, OBC (On Board Charger) refers to charging control unit 200 (the same applies to other figures). Also, in FIG. 10, "◯" means that the device corresponding to this symbol is operating, and "×" means that the device corresponding to this symbol is stopped. Also, "MPU calculation" means that video media control unit 105a participates in grid computing (the same applies to other figures).

[0126] 10, "high" for "second secondary battery power state" means that the second secondary battery 15 is in a power state where it can supply power to the video media control unit 105a (MPU). "low" for "second secondary battery power state" means that the second secondary battery 15 is in a power state where it cannot supply power to the video media control unit 105a (MPU).

[0127] [First mode] - Charging the first secondary battery 14 - In the first mode, power from a normal charger (abbreviated as "charger" in FIG. 10 and other figures) is used to charge the first secondary battery 14. Specifically, the power distribution control unit 105c controls the distributor 110 so that the output of the power conversion device 106 is supplied to the first secondary battery 14.

[0128] This charges the first secondary battery 14. While the first secondary battery 14 is being charged, the power control unit 202 transmits information such as the voltage of the first secondary battery 14 to the power distribution control unit 105c.

[0129] -Power supply to MPU- In the first mode, power is supplied to the video media control unit 105a (MPU). In the first mode, the power supply source to the video media control unit 105a varies depending on whether the power state of the second secondary battery 15 (12V battery) is "high" or "low." When the power state of the second secondary battery 15 is "high," power is supplied directly from the second secondary battery 15 to the video media control unit 105a.

[0130] When the power state of the second secondary battery 15 is "low", power from the normal charger is used to supply power to the video media control unit 105a. Specifically, the power distribution control unit 105c controls the distributor 110 so that the output of the power conversion device 106 is input to the DC / DC converter 107.

[0131] The DC / DC converter 107 reduces the output voltage (direct current voltage) of the power conversion device 106 to a voltage suitable for the video media control unit 105a. The DC / DC converter 107 supplies the DC voltage thus generated to the video media control unit 105a. This enables the video media control unit 105a to participate in grid computing.

[0132] As described above, in the first mode, the charging control unit 200 (OBC) operates. In other words, power is supplied to the charging control unit 200. In the first mode, power is also supplied to the video media control unit 105a and the power control unit 202. In the first mode, control can be performed so that power is not supplied to devices that are not necessary for the operation of the charging control unit 200, the power control unit 202, and the video media control unit 105a.

[0133] [Second mode] In the second mode, the first secondary battery 14 is charged. In the second mode, as in the first mode, power from the normal charger is used to supply power to the first secondary battery 14. Specifically, in the second mode, the power distribution control unit 105c controls the distributor 110 so that the output of the power conversion device 106 is supplied to the first secondary battery 14.

[0134] In the second mode, power is not supplied to the video media control unit 105a. In this embodiment, the power distribution control unit 105c controls the distributor 110 to stop the power supply to the DC / DC converter 107.

[0135] [Third mode] In the third mode, the first secondary battery 14 is not charged. In the third mode, power is supplied to the video media control unit 105a and the devices that operate it. In the third mode, the power supply source to the video media control unit 105a also differs depending on whether the power state of the second secondary battery 15 (12V battery) is "high" or "low."

[0136] When the power state of the second secondary battery 15 is "high", power is supplied to the video media control unit 105a from the second secondary battery 15. When the power state of the second secondary battery 15 is "low", power obtained from the normal charger is used to supply power to the video media control unit 105a.

[0137] Specifically, when the power state of the second secondary battery 15 is "low," the power distribution control unit 105c controls the distributor 110 so that the output of the power conversion device 106 is input to the DC / DC converter 107. The DC / DC converter 107 reduces the output voltage (direct current voltage) of the power conversion device 106 to a voltage suitable for the video media control unit 105a.

[0138] The DC / DC converter 107 supplies the DC voltage thus generated to the video media control unit 105a, which enables the video media control unit 105a to participate in grid computing.

[0139] In the third mode, when the power state of the second secondary battery 15 is "low", the power distribution control unit 105c and the distributor 110 of the charging control unit 200 (OBC) operate. That is, part of the charging control unit 200 operates. When the power state of the second secondary battery 15 is "low", power is supplied to the power control unit 202 and the DC / DC converter 107.

[0140] On the other hand, when the power state of the second secondary battery 15 is "high", in principle, it is not necessary to operate the charging control unit 200. However, for the sake of power management, the power distribution control unit 105c of the charging control unit 200 may operate. In other words, there may be cases where a part of the charging control unit 200 operates.

[0141] <When vehicle 10 is not connected to a standard charger> When vehicle 10 is traveling, it is not connected to a standard charger. It may also be not connected to a standard charger when parked. When vehicle 10 is not connected to a standard charger, vehicle 10 can select from the following three operating modes (modes 4 to 6).

[0142] (1) A mode (fourth mode) in which the second secondary battery 15 (12V battery) is charged but does not participate in grid computing.

[0143] (2) A mode (fifth mode) in which both the second secondary battery 15 is charged and participation in grid computing is performed.

[0144] (3) A mode in which the second secondary battery 15 is not charged and the device participates in grid computing (sixth mode).

[0145] Fig. 11 is a table explaining power control when vehicle 10 is not connected to a standard charger. In Fig. 11, OBC also represents charging control unit 200. In Fig. 11, "◯" also represents a state in which the device corresponding to this symbol is operating, and "×" represents a state in which the device corresponding to this symbol is stopped.

[0146] [Fourth mode] In the fourth mode, the power of the first secondary battery 14 is used to charge the second secondary battery 15. In the fourth mode, the power distribution control unit 105c controls the distributor 110 to supply the output of the first secondary battery 14 to the DC / DC converter 107.

[0147] The DC / DC converter 107 steps down the DC voltage (for example, 200 V) supplied from the first secondary battery 14 to a DC voltage (for example, 12 V) suitable for charging the second secondary battery 15. The DC voltage generated by the DC / DC converter 107 is supplied to the second secondary battery 15. In this way, the second secondary battery 15 is charged.

[0148] As described above, in the fourth mode, the distributor 110, the power distribution control unit 105c, and the DC / DC converter 107 operate. In the fourth mode, the power supply to the power conversion device 106 can be stopped.

[0149] [5th ​​mode] In the fifth mode, the second secondary battery 15 is charged using the power of the first secondary battery 14. In the fifth mode, the same control as in the fourth mode is performed to charge the second secondary battery 15. That is, in the fifth mode, the power distribution control unit 105c also controls the distributor 110 to supply the power of the first secondary battery 14 to the DC / DC converter 107. The DC / DC converter 107 supplies the generated direct current voltage to the second secondary battery 15.

[0150] In the fifth mode, the power supply source to the video media control unit 105a differs depending on whether the power state of the second secondary battery 15 is "high" or "low." When the power state of the second secondary battery 15 is "high," the video media control unit 105a is directly supplied with power from the second secondary battery 15.

[0151] When the power state of the second secondary battery 15 is "low", the power of the first secondary battery 14 is used to supply power to the video media control unit 105a. Specifically, the power distribution control unit 105c controls the distributor 110 so that the output of the first secondary battery 14 is input to the DC / DC converter 107.

[0152] The DC / DC converter 107 steps down the DC voltage input from the first secondary battery 14 to a DC voltage suitable for the operation of the video media control unit 105a. The DC voltage generated by the DC / DC converter 107 in this way is supplied to the video media control unit 105a. This enables the video media control unit 105a to participate in grid computing.

[0153] In the fifth mode, the power distribution control unit 105c, the distributor 110, and the DC / DC converter 107 operate. In the fifth mode, the power supply to the power conversion device 106 can be stopped.

[0154] [6th mode] In the sixth mode, power is supplied to the video media control unit 105a and the devices that operate it. Even in the sixth mode, the power supply source to the video media control unit 105a differs depending on whether the power state of the second secondary battery 15 is "high" or "low." When the power state of the second secondary battery 15 is "high," the video media control unit 105a is directly supplied with power from the second secondary battery 15. When the power state of the second secondary battery 15 is "high," no power supply to the charging control unit 200 is necessary.

[0155] When the power state of the second secondary battery 15 is "low", the first secondary battery 14 is used to supply power to the video media control unit 105a. Specifically, the power distribution control unit 105c controls the distributor 110 so that the output of the first secondary battery 14 is input to the DC / DC converter 107.

[0156] The DC / DC converter 107 steps down the DC voltage input from the first secondary battery 14 to a DC voltage suitable for the operation of the video media control unit 105a. The DC voltage generated by the DC / DC converter 107 in this way is supplied to the video media control unit 105a. This enables the video media control unit 105a to participate in grid computing.

[0157] Effect of this embodiment In this embodiment, too, when the vehicle 10 is charging or participating in grid computing, power supply to parts not required for operation can be suppressed. In other words, this embodiment also makes it possible to reduce the power consumption of the computer installed in the vehicle. For example, while the vehicle 10 is parked, power consumption in the central control unit 105b, the driving assistance unit 105e, the electrical system 205, the drive system / steering system 206, the heating and cooling system 207, etc. can be stopped.

[0158] In this embodiment, charging of the secondary battery and power distribution control to the video media control unit 105a (MPU) are completed within the charging control unit 200. Therefore, in this embodiment, control is easy and it is possible to reduce the number of communication lines.

[0159] [Other embodiments] The computer participating in grid computing is not limited to the video media control unit 105a (first computer). In addition to the video media control unit 105a, other computers may also be allowed to participate in grid computing.

[0160] In the first to third modes, some or all of the processing that was previously performed by power distribution control unit 105c may be performed by video media control unit 105a. For example, if video media control unit 105a performs all of the processing that was previously performed by power distribution control unit 105c, power distribution control unit 105c may not be provided.

[0161] The above-described embodiments may be implemented in appropriate combinations. The above-described embodiments are essentially preferred examples and are not intended to limit the scope of the technology disclosed herein, its applications, or its uses. [Explanation of symbols]

[0162] 10 Vehicle (Computer System) 14 Secondary battery (1st secondary battery) 15 Secondary battery (secondary battery) 105a Video Media Control Unit (First Computer) 105b Central control unit (second computer) 105c Power distribution control unit (third computer) 106 Power conversion device (DC power supply section) 107 DC / DC converter (step-down circuit) 108 Cooling device 110 Distributor

Claims

1. In a computer system mounted on a vehicle, a first computer; and a second computer; and a third computer; and A secondary battery; Equipped with the first computer is allowed to participate in grid computing; the second computer is not permitted to participate in the grid computing; the third computer manages charging of the secondary battery, and while the secondary battery is being charged, stops power supply to the second computer and supplies a portion of the power supplied for charging the secondary battery to the first computer; The first computer acts as the third computer. A computer system comprising:

2. 10. The computer system of claim 1, the vehicle includes a cooling device that cools the first computer and the secondary battery; the second computer has a function of controlling the operation of the cooling device; The first computer controls the cooling device in place of the second computer while the secondary battery is being charged, and causes the cooling device to cool the first computer. A computer system comprising:

3. In the computer system of claim 1 or claim 2, a DC power supply unit that converts an input AC voltage into a DC voltage and outputs the DC voltage; a distributor having at least one input terminal and a plurality of output terminals, for outputting a DC voltage input from the input terminal to a designated output terminal; a step-down circuit that steps down an input DC voltage and outputs the stepped-down voltage; Equipped with The secondary batteries include two types of batteries, a first secondary battery and a second secondary battery, which have different output voltages from each other; the output voltage of the first secondary battery is higher than the output voltage of the second secondary battery; an input terminal of the distributor is connected to an output terminal of the DC power supply unit; the distributor has one output terminal connected to the input terminal of the step-down circuit and another output terminal connected to the first secondary battery; The output terminal of the step-down circuit is connected to the first computer. A computer system comprising:

4. 4. The computer system of claim 3, The third computer has a control mode in which the output of the DC power supply unit is supplied to the first secondary battery by controlling the distributor. A computer system comprising:

5. 5. The computer system of claim 3 or claim 4, The third computer has a control mode in which the output of the DC power supply unit is stepped down by the step-down circuit by controlling the distributor, and the output of the step-down circuit is supplied to the first computer. A computer system comprising:

6. In any one of claims 3 to 5, the computer system The third computer has a control mode that causes the power of the second secondary battery to be supplied to the first computer when the power of the second secondary battery is equal to or greater than a predetermined value. A computer system comprising:

7. In the computer system according to any one of claims 3 to 6, an input terminal of the distributor is connected to an output terminal of the first secondary battery; an output terminal of the step-down circuit is connected to the second secondary battery; The third computer has a control mode in which the output of the first secondary battery is stepped down by the step-down circuit by controlling the distributor, and the output of the step-down circuit is supplied to the second secondary battery. A computer system comprising:

8. In the computer system according to any one of claims 3 to 7, an input terminal of the distributor is connected to an output terminal of the first secondary battery; The third computer has a control mode in which the output of the first secondary battery is stepped down by the step-down circuit by controlling the distributor, and the output of the step-down circuit is supplied to the first computer. A computer system comprising:

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