WO2018168392A1 - Dispositif de commande d'alimentation électrique, procédé de commande d'alimentation électrique et programme informatique - Google Patents

Dispositif de commande d'alimentation électrique, procédé de commande d'alimentation électrique et programme informatique Download PDF

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Publication number
WO2018168392A1
WO2018168392A1 PCT/JP2018/006616 JP2018006616W WO2018168392A1 WO 2018168392 A1 WO2018168392 A1 WO 2018168392A1 JP 2018006616 W JP2018006616 W JP 2018006616W WO 2018168392 A1 WO2018168392 A1 WO 2018168392A1
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Prior art keywords
voltage
value
voltage value
terminal
switch
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PCT/JP2018/006616
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English (en)
Japanese (ja)
Inventor
勝也 生田
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Publication of WO2018168392A1 publication Critical patent/WO2018168392A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment

Definitions

  • the present invention relates to a power supply control device, a power supply control method, and a computer program.
  • This application claims priority based on Japanese Patent Application No. 2017-050257 filed on Mar. 15, 2017, and incorporates all the description content described in the above Japanese application.
  • Patent Document 1 discloses a power supply control device that controls power supply from a battery to a load.
  • the power supply control device described in Patent Document 1 has a switch provided in a power supply path from a battery to a load. By switching this switch on or off, power supply from the battery to the load is controlled.
  • the power supply control device includes a switch, an internal terminal that is connected to one end of the switch and is detachably connected to an external terminal, and a voltage value between the internal terminal and the external terminal is a threshold value.
  • a determination unit that determines whether or not the value is above, and a switching unit that switches the switch off when the determination unit determines that the voltage value between the terminals is equal to or greater than the threshold value.
  • a voltage value between terminals between an internal terminal connected to one end of the switch and an external terminal detachably connected to the internal terminal is greater than or equal to a threshold value. And a step of turning off the switch when it is determined that the inter-terminal voltage value is greater than or equal to the threshold value.
  • the terminal voltage value between the internal terminal connected to one end of the switch and the external terminal detachably connected to the internal terminal is greater than or equal to the threshold value.
  • the present invention can be realized not only as a power supply control device including such a characteristic processing unit, but also as a power supply control method using such characteristic processing as a step, It can be realized as a computer program for execution. Further, the present invention can be realized as a semiconductor integrated circuit that realizes part or all of the power supply control device, or can be realized as a power supply control system including the power supply control device.
  • FIG. 1 is a block diagram illustrating a main configuration of a power supply system according to Embodiment 1.
  • FIG. It is a flowchart which shows the procedure of a load side burning prevention process. It is a flowchart which shows the procedure of a load side burning prevention process.
  • a conventional power supply control device as described in Patent Document 1 usually has an internal terminal connected to one end of a switch, and this internal terminal is attached to and detached from an external terminal connected to one end of a load. Connected as possible. When the switch is turned on while the internal terminal is connected to the external terminal, power is supplied from the battery to the load.
  • an object of the present invention is to provide a power supply control device, a power supply control method, and a computer program that can prevent internal terminals and external terminals from being burned out by arc discharge.
  • a power supply control device includes a switch, an internal terminal that is connected to one end of the switch and is detachably connected to an external terminal, and a voltage between the internal terminal and the external terminal.
  • a determination unit that determines whether or not the value is equal to or greater than a threshold; and a switching unit that switches the switch off when the determination unit determines that the voltage value between the terminals is equal to or greater than the threshold.
  • a power supply control device includes a current detection unit that detects a current value of a current flowing through the switch, and a voltage detection that detects a voltage value of the internal terminal with a fixed potential as a reference. And a voltage calculation unit that calculates the voltage value between the terminals based on the current value detected by the current detection unit and the voltage value detected by the voltage detection unit, and the determination unit calculates the voltage It is determined whether the inter-terminal voltage value calculated by the unit is equal to or greater than the threshold value.
  • the current detection unit and the voltage detection unit repeatedly perform detection, and the voltage calculation unit is preceded by the current detection unit and the voltage detection unit.
  • the inter-terminal voltage value is calculated based on the current value and the preceding voltage value, and the current value and voltage value detected by the current detection unit and voltage detection unit this time.
  • the voltage calculation unit repeatedly calculates the voltage value between the terminals, and the voltage calculation unit is detected in advance by the current detection unit and the voltage detection unit.
  • the inter-terminal voltage value is calculated based on the preceding current value and the preceding voltage value, the current value and voltage value detected by the current detecting unit and the voltage detecting unit this time, and the preceding inter-terminal voltage value calculated in advance. .
  • a power supply control device includes a temperature detection unit that detects a temperature in the device itself, and a threshold calculation unit that calculates the threshold based on the temperature detected by the temperature detection unit.
  • the determination unit determines whether the inter-terminal voltage value is equal to or greater than the threshold value calculated by the threshold value calculation unit.
  • the inter-terminal voltage value between the internal terminal connected to one end of the switch and the external terminal detachably connected to the internal terminal is greater than or equal to a threshold value. Determining whether or not there is a step of switching the switch off when it is determined that the voltage value between the terminals is equal to or greater than the threshold value.
  • a voltage between terminals between an internal terminal connected to one end of the switch and an external terminal detachably connected to the internal terminal is a threshold value.
  • the power supply control device when it is determined that the terminal-to-terminal voltage value between the internal terminal and the external terminal is greater than or equal to the threshold value, an arc is generated between the internal terminal and the external terminal. Assuming that there is a possibility that discharge has occurred, the switch is turned off, and power supply via the switch and the internal terminal is stopped. As a result, arc discharge does not continue to occur for a long period of time, thereby preventing internal terminals and external terminals from being burned out due to arc discharge.
  • the internal terminal and the external are based on the current value of the current flowing through the switch and the voltage value of the internal terminal with reference to a fixed potential, for example, the ground potential.
  • the voltage value between terminals is calculated. For this reason, it is possible to calculate the inter-terminal voltage value without detecting the voltage value of the external terminal outside the apparatus.
  • the current value and the voltage value are repeatedly detected.
  • the calculation of the inter-terminal voltage value between the internal terminal and the external terminal is based on the preceding current value and the preceding voltage value detected in advance and the current value and voltage value detected this time. For this reason, an accurate voltage value between terminals is calculated.
  • the temperature in the device itself for example, the temperature around the internal terminal is detected.
  • a threshold value is calculated based on the detected temperature. For this reason, the timing for switching the switch off is appropriate.
  • FIG. 1 is a block diagram illustrating a main configuration of a power supply system 1 according to the first embodiment.
  • the power supply system 1 is suitably mounted on a vehicle and includes a power supply control device 10, external terminals 10 a and 10 b, a battery 11, and a load 12.
  • the positive electrode of the battery 11 is connected to the external terminal 10a, and the negative electrode of the battery 11 is grounded.
  • One end of the load 12 is connected to the external terminal 10b, and the other end of the load 12 is grounded.
  • the external terminals 10 a and 10 b are detachably connected to the power supply control device 10.
  • the battery 11 supplies power to the load 12 through the power supply control device 10.
  • the load 12 is an electric device mounted on the vehicle. When power is supplied from the battery 11 to the load 12, the load 12 operates. When power supply from the battery 11 to the load 12 is stopped, the load 12 stops operating.
  • the power supply control device 10 controls power supply from the battery 11 to the load 12.
  • the power supply control device 10 is input with a drive signal that instructs to drive the load 12 and a stop signal that instructs to stop the operation of the load 12.
  • a drive signal is input
  • the power supply control device 10 electrically connects the positive electrode of the battery 11 and one end of the load 12. Thereby, the battery 11 supplies electric power to the load 12, and the load 12 operates.
  • the stop signal is input, the power supply control device 10 interrupts electrical connection between the positive electrode of the battery 11 and one end of the load 12 and stops power supply from the battery 11 to the load 12. As a result, the load 12 stops operating.
  • the power supply control device 10 when there is a possibility that an arc discharge has occurred between the own device and the external terminal 10a, or an arc discharge has occurred between the own device and the external terminal 10b. If there is a possibility, power supply from the battery 11 to the load 12 is stopped. When the arc discharge is occurring, when the power supply from the battery 11 to the load 12 is stopped, the arc discharge is stopped.
  • the power supply control device 10 includes internal terminals 20a and 20b, a switch 21, a drive circuit 22, a voltage detection unit 23, a current sensor 24, a temperature detection unit 25, and a microcomputer (hereinafter referred to as a microcomputer) 26.
  • the switch 21 is an N-channel FET (Field Effect Transistor).
  • the internal terminal 20a is detachably connected to the external terminal 10a
  • the internal terminal 20b is detachably connected to the external terminal 10b.
  • the internal terminal 20a is connected to the drain of the switch 21, and the source of the switch 21 is connected to the internal terminal 20b.
  • the gate of the switch 21 is connected to the drive circuit 22.
  • a voltage detector 23 is further connected to the internal terminal 20b.
  • the current sensor 24 surrounds a conducting wire that connects the source of the switch 21 and the internal terminal 20b.
  • the drive circuit 22, the voltage detection unit 23, the current sensor 24 and the temperature detection unit 25 are connected to the microcomputer 26 separately. A drive signal and a stop signal are input to the microcomputer 26.
  • the switch 21 when the voltage value of the gate with reference to the source potential is equal to or higher than a certain voltage value, a current may flow between the drain and the source. At this time, the switch 21 is on.
  • the switch 21 When the internal terminals 20a and 20b are connected to the external terminals 10a and 10b, respectively, when the switch 21 is on, the switch 21 electrically connects the positive electrode of the battery 11 and one end of the load 12. .
  • the switch 21 when the gate voltage value with respect to the source potential is less than a certain voltage value, no current flows between the drain and the source. At this time, the switch 21 is off.
  • the switch 21 cuts off the electrical connection between the positive electrode of the battery 11 and one end of the load 12. ing.
  • the microcomputer 26 outputs a high level voltage or a low level voltage to the drive circuit 22.
  • the drive circuit 22 increases the voltage value of the gate with reference to the ground potential.
  • the drive circuit 22 increases the gate voltage value with reference to the ground potential, the gate voltage value with reference to the source potential increases in the switch 21, and the switch 21 is switched from OFF to ON.
  • the ground potential is one of fixed potentials that are fixed potentials.
  • the drive circuit 22 decreases the voltage value of the gate with reference to the ground potential.
  • the drive circuit 22 reduces the gate voltage value with reference to the ground potential, the gate voltage value with reference to the source potential is reduced in the switch 21, and the switch 21 is switched from on to off.
  • the drive circuit 22 of the power supply control device 10 switches the switch 21 on or off by adjusting the voltage value of the gate with reference to the ground potential.
  • the drive circuit 22 switches the switch 21 on or off, power supply from the battery 11 to the load 12 via the internal terminals 20a and 20b and the switch 21 is controlled.
  • the voltage detection unit 23 repeatedly detects the voltage value of the internal terminal 20b with reference to the ground potential, and outputs voltage information indicating the detected detection voltage value Vd to the microcomputer 26.
  • the current sensor 24 repeatedly detects the current value of the current flowing through the drain and source of the switch 21 and outputs current information indicating the detected current value Id to the microcomputer 26.
  • the current sensor 24 functions as a current detection unit.
  • the temperature detector 25 repeatedly detects the environmental temperature Tc in the power supply control device 10, specifically, the temperature around the internal terminal 20 b, and outputs temperature information indicating the detected environmental temperature Tc to the microcomputer 26.
  • the microcomputer 26 switches the voltage output to the drive circuit 22 to a high level voltage or a low level voltage based on the signal, voltage information, current information, and temperature information input to the microcomputer 26.
  • the microcomputer 26 includes input units 30, 31, 32, 33, an output unit 34, a storage unit 35, and a control unit 36. These are connected to the bus 37 separately.
  • the input unit 31 is further connected to the voltage detection unit 23.
  • the input unit 32 is further connected to the current sensor 24.
  • the input unit 33 is connected to the temperature detection unit 25.
  • the output unit 34 is further connected to the drive circuit 22.
  • a drive signal and a stop signal are input to the input unit 30.
  • the input unit 30 notifies the control unit 36 of the input signal.
  • Voltage information is input from the voltage detection unit 23 to the input unit 31.
  • the control unit 36 acquires voltage information from the input unit 31.
  • the detected voltage value Vd indicated by the voltage information acquired by the control unit 36 substantially matches the detected voltage value Vd detected by the voltage detection unit 23 at the time of acquisition of the voltage information.
  • the control unit 36 acquires current information from the input unit 32.
  • the detected current value Id indicated by the current information acquired by the control unit 36 substantially matches the detected current value Id detected by the current sensor 24 at the time of acquiring the current information.
  • Temperature information is input from the temperature detection unit 25 to the input unit 33.
  • the control unit 36 acquires temperature information from the input unit 33.
  • the environmental temperature Tc indicated by the temperature information acquired by the control unit 36 substantially matches the environmental temperature Tc detected by the temperature detection unit 25 at the time of acquisition of the temperature information.
  • the output unit 34 outputs a high level voltage or a low level voltage to the drive circuit 22. As described above, when the voltage output from the output unit 34 is switched from the low level voltage to the high level voltage, the drive circuit 22 switches the switch 21 from off to on, and the output unit 34 outputs. When the voltage is switched from the high level voltage to the low level voltage, the switch 21 is switched from on to off.
  • the control unit 36 instructs the output unit 34 to turn on or off the switch 21.
  • the control unit 36 instructs the output unit 34 to turn on the switch 21
  • the output unit 34 switches the voltage output to the drive circuit 22 from the low level voltage to the high level voltage.
  • the control unit 36 instructs the output unit 34 to turn off the switch 21
  • the output unit 34 switches the voltage output to the drive circuit 22 from the high level voltage to the low level voltage.
  • the storage unit 35 is, for example, a nonvolatile memory.
  • the storage unit 35 stores a computer program P1.
  • the control unit 36 has a CPU (Central Processing Unit).
  • the CPU of the control unit 36 executes the computer program P1, thereby executing power supply control processing, battery-side burnout prevention processing, and load-side burnout prevention processing.
  • the computer program P1 is a computer program for causing the CPU of the control unit 36 to execute power supply control processing, battery-side burnout prevention processing, and load-side burnout prevention processing.
  • the power supply control process is a process for controlling power supply from the battery 11 to the load 12.
  • the battery-side burnout prevention process is a process for preventing the external terminal 10a and the internal terminal 20a from being burned out by arc discharge.
  • the load-side burnout prevention process is a process for preventing the external terminal 10b and the internal terminal 20b from being burned out by arc discharge.
  • the computer program P1 may be stored in the storage medium A1 so that the computer can read it.
  • the computer program P1 read from the storage medium A1 by a reading device (not shown) is stored in the storage unit 35.
  • the storage medium A1 is an optical disk, a flexible disk, a magnetic disk, a magnetic optical disk, a semiconductor memory, or the like.
  • the optical disc is a CD (Compact Disc) -ROM (Read Only Memory), a DVD (Digital Versatile Disc) -ROM, or a BD (Blu-ray (registered trademark) Disc).
  • the magnetic disk is, for example, a hard disk.
  • the computer program P1 may be downloaded from an external device (not shown) connected to a communication network (not shown), and the downloaded computer program P1 may be stored in the storage unit 35.
  • the control unit 36 periodically executes the power feeding control process.
  • the control unit 36 determines whether a drive signal is input to the input unit 30.
  • the control unit 36 instructs the output unit 34 to turn on the switch 21.
  • the output unit 34 switches the voltage output to the drive circuit 22 to a high level voltage, and the drive circuit 22 switches the switch 21 on.
  • the battery 11 supplies power to the load 12, and the load 12 operates.
  • the control unit 36 ends the power supply control process.
  • the control unit 36 determines whether a stop signal is input to the input unit 30. When it is determined that the stop signal is input to the input unit 30, the control unit 36 instructs the output unit 34 to turn off the switch 21. Accordingly, the output unit 34 switches the voltage output to the drive circuit 22 to the low level voltage, and the drive circuit 22 switches the switch 21 to OFF. As a result, power supply from the battery 11 to the load 12 is stopped, and the load 12 stops operating. After instructing the output unit 34 to turn off the switch 21, the control unit 36 ends the power supply control process. When it is determined that the stop signal is not input to the input unit 30, the control unit 36 ends the power supply control process.
  • the control unit 36 periodically executes the battery-side burnout prevention process. First, the control unit 36 determines whether or not the switch 21 is on. When determining that the switch 21 is on, the control unit 36 acquires voltage information from the input unit 31 and determines whether or not the detected voltage value Vd indicated by the acquired voltage information is less than the reference voltage value.
  • the reference voltage value is a constant value and is set in advance.
  • the detected voltage value Vd detected by the voltage detector 23 substantially matches the output voltage value of the battery 11, and the reference More than the voltage value. In the same case, when the external terminal 10a and the internal terminal 20a are disconnected and arc discharge occurs, a large voltage drop occurs between the external terminal 10a and the internal terminal 20a. At this time, the detected voltage value Vd detected by the voltage detector 23 is less than the reference voltage value.
  • the control unit 36 When it is determined that the detected voltage value Vd indicated by the acquired voltage information is less than the reference voltage value, the control unit 36 outputs that the arc discharge may occur between the external terminal 10a and the internal terminal 20a.
  • the unit 34 is instructed to turn off the switch 21.
  • the output unit 34 switches the voltage output to the drive circuit 22 to a low level voltage, and the drive circuit 22 switches the switch 21 off, so that the power supply from the battery 11 to the load 12 is stopped.
  • the arc discharge stops when the power supply from the battery 11 to the load 12 is stopped. From the above, since arc discharge does not continue to occur between the external terminal 10a and the internal terminal 20a for a long time, the external terminal 10a and the internal terminal 20a are prevented from being burned out by arc discharge.
  • the control unit 36 instructs the output unit 34 to turn off the switch 21, and then ends the battery-side burnout prevention process. Thereafter, the control unit 36 does not execute the power supply control process, the battery-side burnout prevention process, and the load-side burnout prevention process, and the drive circuit 22 maintains the switch 21 off.
  • the control unit 36 When it is determined that the switch 21 is off, or when the detected voltage value Vd indicated by the voltage information acquired from the input unit 31 is greater than or equal to the reference voltage value, the control unit 36 performs battery-side burnout prevention processing. finish. Thereafter, when the next cycle comes, the control unit 36 executes the battery-side burnout prevention process again.
  • the control unit 36 periodically executes load side burnout prevention processing.
  • the storage unit 35 stores flag values. The value of the flag is changed to zero or one by the control unit 36.
  • the storage unit 35 stores a first voltage value Vs1, a first current value Is1, a first target value Vt1, a second voltage value Vs2, a second current value Is2, and a second target value Vt2. These values are changed by the control unit 36.
  • the control unit 36 determines whether or not the switch 21 is on (step S1). When it is determined that the switch 21 is not on, that is, the switch 21 is off (S1: NO), the control unit 36 changes the flag value to zero (step S2) and ends the load-side burnout prevention process. To do.
  • control unit 36 ends the load-side burnout prevention process without executing Step S2.
  • control unit 36 executes the load-side burnout prevention process again when the next period comes.
  • step S3 When it is determined that the switch 21 is on (S1: YES), the controller 36 determines whether or not the value of the flag is zero (step S3). When it is determined that the flag value is zero (S3: YES), the control unit 36 changes the flag value to 1 (step S4), and acquires voltage information from the input unit 31 (step S5). Next, the control unit 36 changes the first voltage value Vs1 to the detected voltage value Vd indicated by the voltage information acquired in step S5 (step S6).
  • step S6 the control unit 36 acquires current information from the input unit 32 (step S7).
  • step S8 the control unit 36 changes the first current value Is1 to the detected current value Id indicated by the current information acquired in Step S7 (Step S8).
  • Step S8 the control unit 36 changes the first target value Vt1 to zero V (Step S9), and ends the load-side burnout prevention process.
  • the control unit 36 executes the load-side burnout prevention process again.
  • the flag value is 1, so that a process different from steps S4 to S9 is executed.
  • steps S4 to S9 are executed, and the first voltage value Vs1, The 1 current value Is1 and the first target value Vt1 are changed.
  • a flag value of 1 means that the load-side burnout prevention process being executed is a load-side burnout prevention process that is executed the second time or later after the switch 21 is turned on.
  • control unit 36 determines that the flag value is not zero, that is, the flag value is 1 (S3: NO)
  • the control unit 36 acquires voltage information from the input unit 31 (step S10).
  • the control unit 36 changes the second voltage value Vs2 to the detected voltage value Vd indicated by the voltage information acquired in step S10 (step S11), and acquires current information from the input unit 32 (step S12).
  • the control unit 36 changes the second current value Is2 to the detected current value Id indicated by the current information acquired in Step S12 (Step S13).
  • the control unit 36 sets the first current value Is1, the first voltage value Vs1, the second current value Is2, the second voltage value Vs2, and the first target value Vt1 stored in the storage unit 35 as [1 ],
  • the inter-terminal voltage value Va between the external terminal 10b and the internal terminal 20b is calculated (step S14).
  • Va Vs2- (Vs1 ⁇ Is2 / Is1) + (Vt1 ⁇ Is2 / Is1) [1] [1]
  • ⁇ Represents a product.
  • the control unit 36 functions as a voltage calculation unit.
  • control unit 36 changes the second target value Vt2 to the inter-terminal voltage value Va calculated in step S14 (step S15).
  • control unit 36 acquires temperature information from the input unit 33 (step S16), and calculates a threshold value Vth by substituting the environmental temperature Tc indicated by the acquired temperature information into the following equation [2] (step S16). S17).
  • the control unit 36 also functions as a threshold value calculation unit.
  • Vth ⁇ ⁇ 4 ⁇ L ⁇ ((Tm 2 ) ⁇ (Tc 2 )) ⁇ [2]
  • Tm is the contact point boiling temperature of the external terminal 10b and the internal terminal 20b, and is a value determined by the material constituting the external terminal 10b and the internal terminal 20b. Therefore, the contact point boiling temperature Tm is constant.
  • Each of the external terminal 10b and the internal terminal 20b is made of a material such as silver, copper, tungsten, or carbon.
  • the contact point boiling temperature Tm is a temperature at which boiling occurs at the contact surfaces of the external terminal 10b and the internal terminal 20b.
  • the threshold value Vth is a voltage value at which arc discharge occurs.
  • the threshold value Vth varies depending on the environmental temperature Tc. As shown in the equation (2), the higher the environmental temperature Tc, the lower the threshold value Vth, and the lower the environmental temperature Tc, the higher the threshold value Vth.
  • the expression [2] is derived based on Holm's theory.
  • the control unit 36 determines whether or not the second target value Vt2 stored in the storage unit 35 is equal to or greater than the threshold value Vth calculated in step S17 (step S18).
  • the control unit 36 also functions as a determination unit.
  • the control unit 36 sets the first voltage value Vs1 to the same value as the second voltage value Vs2 stored in the storage unit 35.
  • the first current value Is1 is changed to the same value as the second current value Is2 stored in the storage unit 35 (step S20).
  • the control unit 36 changes the first target value Vt1 to the same value as the second target value Vt2 (step S21), and ends the load-side burnout prevention process. Thereafter, when the next cycle comes, the control unit 36 executes the load-side burnout prevention process again.
  • step S14 of the load-side burnout prevention process that is executed again the control unit 36 performs the previous load-side burnout prevention process.
  • the inter-terminal voltage value Va is calculated based on the first voltage value Vs1, the first current value Is1, and the first target value Vt1 changed in steps S19 to S21.
  • the control unit 36 instructs the output unit 34 to turn off the switch 21 (step S22). Accordingly, the output unit 34 switches the voltage output to the drive circuit 22 from the high level voltage to the low level voltage, and the drive circuit 22 switches the switch 21 from on to off. Thereby, the power supply from the battery 11 to the load 12 is stopped. As described above, when the arc discharge is generated between the external terminal 10b and the internal terminal 20b, when the power supply from the battery 11 to the load 12 is stopped, the arc discharge is also stopped.
  • the drive circuit 22 functions as a switching unit.
  • the control part 36 complete
  • the load-side burnout prevention process always includes a process for acquiring voltage information and current information. Further, as described above, the load-side burnout prevention process is repeatedly executed.
  • the voltage detector 23 repeatedly detects the voltage value at the timing when the voltage information is acquired, and the current sensor 24 repeatedly detects the current value at the timing when the current information is acquired.
  • step S14 is repeatedly executed unless the switch 21 is switched off, and the control unit 36 The value Va is calculated repeatedly.
  • the first voltage value Vs1 and the first current value Is1 are the detected voltage value Vd and the detected current value Id detected in the previous load-side burnout prevention process, respectively.
  • the second voltage value Vs2 and the second current value Is2 are the detected voltage value Vd and the detected current value Id detected in the current load-side burnout prevention process.
  • the inter-terminal voltage value Va is a terminal voltage value at the time when the current load-side burnout prevention process is executed.
  • the terminal voltage value at the time when the previous load-side burnout prevention process is executed is the inter-terminal voltage value calculated in the previous load-side burnout prevention process, that is, the first target value Vt1.
  • the voltage value across the load 12 at the time when the previous load-side burnout prevention process is performed is calculated by subtracting the first target value Vt1 that is the voltage value between the terminals from the first voltage value Vs1, ( Vs1-Vt1).
  • the voltage value across the load 12 at the time when the current load-side burnout prevention process is executed is calculated by subtracting the inter-terminal voltage value Va from the second voltage value Vs2, and is expressed by (Vs2-Va).
  • the load-side burnout prevention process is repeatedly executed at short intervals. For this reason, it can be considered that the resistance value r1 coincides with the resistance value r2.
  • the following equation [5] is derived from the equations [3] and [4].
  • (Vs2-Va) / Is2 (Vs1-Vt1) / Is1 ... [5]
  • the expression [1] is derived by expanding the expression [5] with respect to the inter-terminal voltage value Va.
  • the first voltage value Vs1, the first current value Is1, and the first target value Vt1 are inappropriate in the load-side burnout prevention process that is first performed after the switch 21 is switched from OFF to ON, the voltage across the terminals The value Va cannot be calculated. For this reason, in the load-side burnout prevention process that is executed first, the first voltage value Vs1 and the first current value Is1 are changed to appropriate values, and the inter-terminal voltage value Va between the external terminal 10b and the internal terminal 20b is zero. V is assumed to be V, and the first target value Vt1 is changed to zero V.
  • the control unit 36 determines that the inter-terminal voltage value Va between the external terminal 10b and the internal terminal 20b is equal to or greater than the threshold value Vth, the external terminal 10b and the internal terminal 20b.
  • the drive circuit 22 switches the switch 21 to OFF because there is a possibility that arc discharge has occurred. Thereby, the power supply via the internal terminals 20a and 20b and the switch 21 is stopped. As a result, since arc discharge does not continue to occur for a long period of time, burning of the external terminal 10b and the internal terminal 20b caused by arc discharge is prevented.
  • control unit 36 calculates the inter-terminal voltage value Va based on the detected voltage value Vd detected by the voltage detecting unit 23 and the detected current value Id detected by the current sensor 24. For this reason, the inter-terminal voltage value Va can be calculated without detecting the voltage value of the external terminal 10b outside the power supply control device 10. Therefore, even when the external terminal and the load used as the external terminal 10 b and the load 12 are changed, it is only necessary to connect the external terminal to the internal terminal 20 b of the power supply control device 10.
  • control unit 36 includes the first voltage value Vs1 and the first current value Is1 that are the preceding current value and the preceding voltage value detected in advance, and the second voltage value Vs2 that is the current value and the voltage value detected this time, and A terminal voltage value Va is calculated based on the second current value Is2. For this reason, an accurate voltage value Va between terminals is calculated.
  • control unit 36 is not only the first voltage value Vs1, the first current value Is1, the second voltage value Vs2, and the second current value Is2, but also the inter-terminal voltage value calculated in the previous load-side burnout prevention process.
  • An inter-terminal voltage value Va is calculated based on the first target value Vt1. Therefore, a more accurate inter-terminal voltage value Va is calculated.
  • control unit 36 calculates an appropriate threshold value Vth based on the environmental temperature Tc detected by the temperature detection unit 25. For this reason, the timing at which the second target value Vt2, which is the voltage value between terminals calculated in the current load-side burnout prevention processing, is equal to or higher than the threshold value Vth, that is, the timing at which the drive circuit 22 switches the switch 21 off is appropriate.
  • the expression used by the control unit 36 to calculate the inter-terminal voltage value Va is not limited to the expression [1].
  • the second embodiment will be described while referring to differences from the first embodiment. Since the configuration other than the configuration described below is the same as that of the first embodiment, the same reference numerals as those of the first embodiment are given to the components common to the first embodiment, and the description thereof is omitted.
  • the inter-terminal voltage value Va between the external terminal 10b and the internal terminal 20b is zero V when the external terminal 10b is attached to the internal terminal 20b.
  • the inter-terminal voltage value Va between the external terminal 10b and the internal terminal 20b is substantially zero V.
  • the drive circuit 22 keeps the switch 21 off.
  • the control unit 36 does not execute the load-side burnout prevention process. For this reason, the first target value Vt1 may be approximated to zero V.
  • control unit 36 does not execute steps S9 and S21 in the load-side burnout prevention process. Specifically, after executing Step S8, the control unit 36 ends the load-side burnout prevention process without executing Step S9. Moreover, the control part 36 complete
  • step S14 of the load-side burnout prevention process the control unit 36 sets the first current value Is1, the first voltage value Vs1, the second current value Is2, and the second voltage value Vs2 stored in the storage unit 35 as follows.
  • the inter-terminal voltage value Va between the external terminal 10b and the internal terminal 20b is calculated by substituting into the equation [6].
  • Va Vs2 ⁇ (Vs1 ⁇ Is2 / Is1) [6]
  • the inter-terminal voltage value Va does not vary with the inter-terminal voltage value calculated in the previous load-side burnout prevention process, and the first current value Is1, the first voltage value Vs1, the second current value Is2, and the second voltage. Based on the value Vs2.
  • the load on the control unit 36 for executing the load-side burnout prevention process is small.
  • the power supply control device 10 according to the second embodiment has only the first current value Is1, the first voltage value Vs1, the second current value Is2, and the second voltage value Vs2 among the effects exhibited by the power supply control device 10 according to the first embodiment.
  • other effects are obtained in the same manner except for the effect obtained by calculating the inter-terminal voltage value Va based on the first target value Vt1.
  • the switch 21 is not limited to an N-channel FET, and may be a P-channel FET, a bipolar transistor, a relay contact, or the like.
  • the threshold value Vth may be a predetermined constant value. For example, when the environmental temperature Tc in the power supply control device 10 is assumed to be substantially constant, the threshold value Vth is the environmental temperature Tc ⁇ ⁇ 4 ⁇ L ⁇ ((Tm 2 ) ⁇ (Tc 2 )) ⁇ May be fixed to a value calculated by substitution.
  • the threshold value Vth may be fixed to a value equal to or lower than the lower limit value of ⁇ square root ⁇ ⁇ 4 ⁇ L ⁇ ((Tm 2 ) ⁇ (Tc 2 )) ⁇ .
  • the first voltage value Vs1 is not limited to the detection voltage value Vd detected by the voltage detection unit 23 in the previous load-side burnout prevention process, and may be the detection voltage value Vd detected in advance.
  • the first current value Is1 is not limited to the detected current value Id detected by the current sensor 24 in the previous load-side burnout prevention process, and may be the detected current value Id detected in advance.
  • the second target value Vt2 is not limited to the inter-terminal voltage value Va calculated in the previous load-side burnout prevention process, and may be any inter-terminal voltage value Va calculated in advance.
  • the current sensor 24 may function as a current detection unit.
  • the configuration of the current sensor 24 is not limited to the configuration surrounding the conducting wire, and may be, for example, a configuration that detects a voltage value between both ends of a resistor connected in series to the switch 21 and the internal terminal 20b. . According to Ohm's law, the voltage value across the resistor is proportional to the current value of the current flowing through the switch 21 and the resistor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)

Abstract

La présente invention concerne un commutateur (21) qui est un FET du type à N canaux. À l'intérieur d'un dispositif (10) de commande d'alimentation électrique, une borne interne (20b) est reliée au drain du commutateur (21). La borne interne (20b) est reliée de façon détachable à une borne externe (10b). Dans le cas où une unité (36) de commande détermine que la valeur de la tension entre les bornes entre la borne externe (10b) et la borne interne (20b) est supérieure ou égale à une valeur seuil, le commutateur (21) est placé en position ARRET par un circuit (22) d'attaque.
PCT/JP2018/006616 2017-03-15 2018-02-23 Dispositif de commande d'alimentation électrique, procédé de commande d'alimentation électrique et programme informatique WO2018168392A1 (fr)

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JP2017-050257 2017-03-15
JP2017050257A JP2018157621A (ja) 2017-03-15 2017-03-15 給電制御装置、給電制御方法及びコンピュータプログラム

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WO2021230051A1 (fr) * 2020-05-13 2021-11-18 株式会社オートネットワーク技術研究所 Dispositif de commande d'alimentation électrique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007290457A (ja) * 2006-04-24 2007-11-08 Omron Corp 車載用電源制御装置
JP2009055754A (ja) * 2007-08-29 2009-03-12 Yazaki Corp 保護回路
JP2009236594A (ja) * 2008-03-26 2009-10-15 Mitsubishi Electric Corp 接続異常検知装置および家電機器
JP2010251104A (ja) * 2009-04-15 2010-11-04 Sanyo Electric Co Ltd パック電池
JP2016082682A (ja) * 2014-10-15 2016-05-16 株式会社オートネットワーク技術研究所 通電制御装置及び通電制御方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007290457A (ja) * 2006-04-24 2007-11-08 Omron Corp 車載用電源制御装置
JP2009055754A (ja) * 2007-08-29 2009-03-12 Yazaki Corp 保護回路
JP2009236594A (ja) * 2008-03-26 2009-10-15 Mitsubishi Electric Corp 接続異常検知装置および家電機器
JP2010251104A (ja) * 2009-04-15 2010-11-04 Sanyo Electric Co Ltd パック電池
JP2016082682A (ja) * 2014-10-15 2016-05-16 株式会社オートネットワーク技術研究所 通電制御装置及び通電制御方法

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