WO2022092142A1

WO2022092142A1 - Heater heating control device, heater heating control method, and heater heating control program

Info

Publication number: WO2022092142A1
Application number: PCT/JP2021/039629
Authority: WO
Inventors: 直宮本
Original assignee: 株式会社クラベ
Priority date: 2020-10-29
Filing date: 2021-10-27
Publication date: 2022-05-05
Also published as: JPWO2022092142A1

Abstract

Conventional control devices have posed a problem in that the devices involve a large mounting volume. A heater heating control device according to the present invention has: a drive circuit (21); a first switch (SW0) for selecting either one of a battery voltage (Vbat) and a capacitor voltage (Vc1) so as to apply the selected voltage to the drive circuit (21); a capacitor (24) having one terminal from which the capacitor voltage (Vc1) is outputted; a second switch (SW2) for selecting either one of a ground voltage and a battery voltage (Vbat) applied from the outside as to apply the selected voltage to the other terminal of the capacitor (24); and a control unit (22). The control unit (22) controls the second switch (SW2) so that the battery voltage (Vbat) is applied to the other terminal of the capacitor (24) during a rapid heating period designated by a host system to thereby apply the capacitor voltage (Vc1) to the drive circuit (21). During a steady control period in which a heater (31) is controlled at a temperature of or close to a target value, electric power is supplied from the drive circuit (21) to the heater (31) on the basis of the battery voltage (Vbat).

Description

Heater heating control device, heater heating control method and heater heating control program

The present invention relates to a heater heating control device, a heater heating control method, and a heater heating control program. For example, the present invention relates to a heater heating control device that performs rapid heating control in the initial stage of heating of a heater, a heater heating control method, and a heater heating control program.

Some heaters have a quick warming function that shortens the time required to reach the target temperature. Patent Documents 1 and 2 disclose techniques for a heater having such a quick warming function.

In Patent Document 1, a system including a temperature-controlled device, a primary energy source, an electronic device, an electromechanical device, or both, wherein the electronic device, the electromechanical device, or both are used. In a system including a secondary energy source, a switching device, a measuring device, and in some cases a controller, when the temperature controlled device is turned on, the temperature controlled device is connected to the secondary energy source and the measuring device is connected. A system is disclosed in which a switching device switches from a secondary energy source to a primary energy source when a predetermined state is measured and the temperature controlled device reaches a predetermined state, and the predetermined state is reached within about 60 seconds.

In Patent Document 2, a system including (a) a device subject to temperature control, (b) a primary energy source, (c) an electronic device, an electromechanical device, or both, and (c) an electron. A system comprising a formula device, an electromechanical device, or both (22): (i) a secondary energy source, (ii) a switching device, (iii) a measuring device, and (iv) a controller in some cases. When the temperature control target device is turned on, the temperature control target device is connected to the secondary energy source, the measuring device measures a predetermined state, and when the temperature control target device reaches a predetermined state, the switching device is two. A system is disclosed that switches from a secondary energy source to a primary energy source and reaches a predetermined state within about 60 seconds.

Japanese Patent No. 6310508 Japanese Patent No. 5961324

However, for example, in a heater system mounted on an automobile or the like, there is a problem that a place for arranging a heater heating control device for controlling the heating of the heater is limited. Here, when constructing a heater system having a quick warming function, it is necessary to generate a voltage higher than that of the primary energy source as a secondary energy source. Although the system described in Patent Documents 1 and 2 discloses this secondary energy source, it does not mention the volume saving of the secondary energy source, and even if Patent Documents 1 and 2 are referred to, it is not mentioned. There is a problem that the next energy source cannot be contained in the mountable volume.

One aspect of the heater heating control device of the present invention includes a drive circuit that supplies power to the heater, a first switch that selectively supplies either a battery voltage or a capacitor voltage to the drive circuit, and the above from one end. A capacitor that outputs a capacitor voltage, a capacitor charging power source that stores power in the capacitor, a second switch that selectively supplies a battery voltage and a ground voltage to the other end of the capacitor, and a drive circuit. The capacitor has a charging power supply, a control circuit for controlling the first switch and the second switch, and the control circuit is attached to the other end of the capacitor during a rapid heating period specified by a higher-level system. The second switch is controlled so that the battery voltage is given, and the drive circuit and the first switch are controlled so that the drive circuit supplies power to the heater based on the capacitor voltage. In the steady control period in which the heater is controlled at a temperature near the target value, the drive circuit and the first switch are controlled so that the drive circuit supplies power to the heater based on the battery voltage.

One aspect of the heater heating control method of the present invention includes a drive circuit that supplies power to the heater, a first switch that selectively supplies either a battery voltage or a capacitor voltage to the drive circuit, and the above from one end. A capacitor that outputs a capacitor voltage, a capacitor charging power source that stores power in the capacitor, a second switch that selectively supplies a battery voltage and a ground voltage to the other end of the capacitor, and a drive circuit. A heater heating control method for a heater heating control device comprising the capacitor charging power supply, the first switch, and a control circuit for controlling the second switch, in a rapid heating period specified by a higher-level system. The drive circuit and the first switch are controlled so that the battery voltage is applied to the other end of the capacitor, and the drive circuit supplies power to the heater based on the capacitor voltage. During the steady control period in which the switch is controlled and the heater is controlled at a temperature near the target value, the drive circuit and the first switch are controlled so that the drive circuit supplies power to the heater based on the battery voltage. ..

One aspect of the heater heating control program of the present invention includes a drive circuit that supplies power to the heater, a first switch that selectively supplies either a battery voltage or a capacitor voltage to the drive circuit, and the above from one end. A capacitor that outputs a capacitor voltage, a capacitor charging power source that stores power in the capacitor, a second switch that selectively supplies a battery voltage and a ground voltage to the other end of the capacitor, and a drive circuit. , The heater heating control program executed by the control circuit of the heater heating control device having the capacitor charging power supply, the control circuit for controlling the first switch and the second switch, and the heater heating control. The program controls the second switch so that the battery voltage is applied to the other end of the capacitor during the rapid heating period specified by the host system, and the drive circuit supplies the heater to the heater based on the capacitor voltage. During the steady control period in which the drive circuit and the first switch are controlled so as to supply power, and the heater is controlled at a temperature near a target value, the drive circuit supplies power to the heater based on the battery voltage. The drive circuit and the first switch are controlled so as to do so.

According to the heater heating control device, the heater heating control method, and the heater heating control program according to the present invention, it is possible to reduce the capacity required for the capacitor that supplies electric power during the rapid heating period and reduce the mounting area.

It is a block diagram of the heater system including the heater heating control device which concerns on Embodiment 1. FIG. It is a state transition diagram explaining the control sequence of the heater heating control device which concerns on Embodiment 1. FIG. It is a block diagram of the heater system including the heater heating control device which concerns on Embodiment 2. FIG. It is a state transition diagram explaining the control sequence of the heater heating control device which concerns on Embodiment 2. FIG. It is a block diagram of the heater system including the heater heating control device which concerns on Embodiment 3. FIG. It is a state transition diagram explaining the control sequence of the heater heating control device which concerns on Embodiment 3. FIG. It is a block diagram of the heater system including the heater heating control device which concerns on Embodiment 4. FIG. It is a state transition diagram explaining the control sequence of the heater heating control apparatus which concerns on Embodiment 4. FIG.

For the sake of clarification of the explanation, the following description and drawings have been omitted or simplified as appropriate. In addition, each element described in the drawing as a functional block that performs various processing can be configured by a CPU (Central Processing Unit), a memory, and other circuits in terms of hardware, and in terms of software, memory. It is realized by the program loaded in. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof, and the present invention is not limited to any of them. In each drawing, the same elements are designated by the same reference numerals, and duplicate explanations are omitted as necessary.

Further, the above-mentioned program can be stored in various types of non-transitory computer readable medium and supplied to the computer. Non-temporary computer-readable media include various types of tangible storage mediums. Examples of non-temporary computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROMs (Read Only Memory) CD-Rs, CDs. -R / W, including semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (RandomAccessMemory)). The program may also be supplied to the computer by various types of transient computer readable medium. Examples of temporary computer readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

Embodiment 1
In the embodiment described below, the heater system 1 including the heater heating control device 20 will be described. An example of applying the heater system 1 to an automobile seat heater will be described. However, the heater system 1 can be applied not only to the seat but also to a heater attached to a steering wheel or other vehicle parts, or a product other than an automobile. It is applicable to various products such as heaters used in the above.

FIG. 1 shows a block diagram of a heater system 1 including a heater heating control device 20 according to the first embodiment. As shown in FIG. 1, the heater system 1 includes a vehicle power supply 10, a heater heating control device 20, and a heater unit 30. The vehicle power supply 10 is a battery of an automobile on which the heater system 1 is mounted. The heater unit 30 is a control target of the heater heating control device 20. The heater unit 30 is provided with a heater 31 and a temperature sensor 32. One end of the heater 31 is connected to the drive circuit 21 of the heater heating control device 20, and the other end is connected to a ground terminal to which a ground voltage is applied. The temperature sensor 32 detects the temperature of the unheated material heated by the heater 31.

The heater heating control device 20 controls the temperature of the heater unit 30 to be controlled. The heater heating control device 20 has a quick warming control function that rapidly raises the temperature in the initial stage of heating the heater 31. The heater heating control device 20 includes a drive circuit 21, a control circuit 22, a capacitor charging power supply 23, and a capacitor 24. Further, the heater heating control device 20 has a switching circuit for switching the connection between the blocks. In the example shown in FIG. 1, the changeover circuit includes a first switch (switch SW0), a second switch (switch SW2), and a switch SW1.

The heater heating control device 20 obtains electric power for heating the heater 31 from the vehicle power supply 10 via the battery wiring W1. The voltage output by the vehicle power supply 10 is referred to as a battery voltage Vbat. The capacitor charging power supply 23 converts the battery voltage Vbat voltage into a voltage required for charging the capacitor 24 to charge the capacitor 24.

Switch SW0 is a 3-terminal switch, and has a P terminal, an N terminal, and a common terminal. The switch SW0 selects either the P terminal or the N terminal and connects to the common terminal according to the instruction of the control circuit 22. In the heater heating control device 20, the battery wiring W1 is connected to the P terminal of the switch SW0, and the battery voltage Vbat is given. Further, one end (for example, a positive electrode terminal) of the capacitor 24 is connected to the N terminal of the switch SW0, and the capacitor voltage Vc1 is given. In the heater heating control device 20, when the switch SW0 selects the N terminal, the capacitor voltage Vc1 becomes the boost voltage. Then, the common terminal of the switch SW0 is connected to the drive circuit 21, and the voltage applied to the selected terminal is applied to the drive circuit 21 as the input voltage Vs1. That is, in the heater heating control device 20, the switch SW0 selects one of the battery voltage Vbat and the boosted voltage and gives it to the drive circuit.

The drive circuit 21 is given an input voltage Vs1 and supplies electric power for heating the heater 31 to one end of the heater 31 according to the instruction of the control circuit 22. The other end of the heater 31 is connected to a ground terminal to which a ground voltage is applied.

The switch SW1 is a two-terminal switch, and switches whether or not to connect the output terminal of the capacitor charging power supply 23 to one end of the capacitor 24 according to the instruction of the control circuit 22. The switch SW2 is a three-terminal switch and has a P terminal, an N terminal, and a common terminal. The switch SW2 selects either the P terminal or the N terminal and connects to the common terminal according to the instruction of the control circuit 22. In the heater heating control device 20, the battery wiring W1 is connected to the P terminal of the switch SW2, and the battery voltage Vbat is given. Further, a ground terminal is connected to the N terminal of the switch SW2, and a ground voltage is applied. The common terminal of the switch SW2 is connected to the other end of the capacitor 24 (for example, a negative electrode terminal). That is, the switch SW2 selects one of the battery voltage Vbat and the ground voltage and gives it to the other end of the capacitor 24.

The capacitor 24 stores electric power during the period when the capacitor charging power supply 23 is electrically connected to one end, and discharges the stored electric power during the period when the drive circuit 21 is electrically connected to one end. In the heater heating control device 20, it is preferable to use a lithium ion capacitor or an electric double layer capacitor as the capacitor 24. In the following description, an example of using a lithium ion capacitor as the capacitor 24 will be described. Lithium-ion capacitors output power while maintaining a constant output voltage.

The control circuit 22 acquires the voltage value of the capacitor voltage Vc1 from the capacitor 24, and acquires the detected temperature value which is the temperature of the unheated object from the temperature sensor 32. Further, the control circuit 22 controls the switches SW0, SW1, SW2, the drive circuit 21, and the capacitor charging power supply 23 based on the acquired value and the operation instruction signal (not shown) input from the outside.

In the heater heating control device 20 according to the first embodiment, the control circuit 22 controls the switches SW0 to SW2, so that the capacitor voltage is set to the battery voltage Vbat during the rapid heating period specified by the host system (not shown). The boosted voltage generated by adding Vc1 is given to the drive circuit 21 as the input voltage Vs1. More specifically, the control circuit 22 controls the switch SW2 so that the battery voltage Vbat is applied to the other end of the capacitor 24 in the rapid heating period started from the heating start time of the heater 31, and the drive circuit 21. Controls the drive circuit 21 and the switch SW0 so as to supply power to the heater based on the capacitor voltage Vc1.

Further, in the heater heating control device 20 according to the first embodiment, the control circuit 22 gives the battery voltage Vbat as the input voltage Vs1 to the drive circuit 21 during the steady control period in which the heater is controlled at a temperature near the target value. More specifically, the control circuit 22 is a drive circuit 21 and a switch so that the drive circuit 21 supplies electric power to the heater 31 based on the battery voltage Vbat during the steady control period in which the heater 31 is controlled at a temperature near the target value. Control SW0.

Further, in the heater heating control device 20 according to the first embodiment, the control circuit 22 charges the capacitor 24 with the capacitor charging power supply 23 while the drive circuit 21 is stopped. It controls the power supply 23 and switches SW0 to SW2.

Here, the operation of the heater heating control device 20 according to the first embodiment will be described. Therefore, FIG. 2 shows a state transition diagram illustrating the control sequence of the heater heating control device 20 according to the first embodiment. FIG. 2 shows the transition of states in the control sequence and the state of the switch in each state. The control sequence shown in FIG. 2 shows the transition of the circuit state based on the control performed by the control circuit 22.

As shown in FIG. 2, the heater heating control device 20 enters a standby state when the power is turned on (state A). In this state A, the control circuit 22 controls each switch so that the switch SW0 selects the P terminal, the switch SW1 is turned off, and the switch SW2 selects the N terminal. In this standby state, the drive circuit 21 is assumed to be in a stopped state.

Next, the quick warming sequence performed during the rapid heating period will be described. In this quick warming sequence, the heater control signal PF that controls the heater that controls the temperature of the heater 31 using the temperature sensor 32, the control circuit 22, and the drive circuit 21 is on (valid), and the quick warming sequence is executed. This is performed when the boost signal BOOST instructing the above is in the ON state and the difference between the boosted voltage (Vboost) and the battery voltage Vbat is equal to or greater than the first threshold value V1. In the first embodiment, the boost voltage Vboss is a value calculated by the battery voltage Vbat + the capacitor voltage Vc1. Further, the first threshold value V1 is the output voltage of the capacitor 24 when the charging of the capacitor 24 holds a sufficient charge amount for carrying out the quick warming sequence. When a lithium ion capacitor is used as the capacitor 24, the capacity can be made larger than that of a general capacitor (electrolytic capacitor, ceramic capacitor, etc.), so the voltage change due to the amount of charge is smaller than that of a general capacitor, and when fully charged. The voltage output by one of the lithium ion capacitors has an upper limit voltage of about 3.8V. Therefore, the first threshold value V1 is determined by the number of stages of lithium ion capacitors connected in series in the capacitor 24.

Then, in the quick warming sequence, the heater control signal PF is turned off (invalid), and the boost signal BOOST is turned off, whichever is satisfied. In the quick warming sequence, the heater of the state F is controlled while the switches SW0 to SW2 are controlled by the states C1, D1 and E1. Then, in the state F, the heater control signal PF is off (invalid), the boost signal BOOST is off, the difference between the boost voltage (Vboost) and the battery voltage Vbat is the second threshold value V2 or less, and the thermistor is the detected temperature value. The temperature is continued until any one of the temperature threshold value T1 or higher is satisfied. Then, the quick warming sequence ends the quick warming sequence while controlling the switches SW0 to SW2 by the states E2, D2, and C2.

The second threshold value V2 is a voltage when the charge amount of the capacitor 24 becomes more difficult to discharge. Further, the temperature threshold value T1 is, for example, a target temperature of the heater 31 or a temperature slightly lower than the target temperature, and is a preset value.

In the states C1 and C2, the control circuit 22 sets the switch SW0 to neither the P terminal nor the N terminal, sets the switch SW1 to the off state, and switches SW2 selects both the P terminal and the N terminal. Control each switch so that it is in a non-existent state. In this state, the drive circuit 21 is assumed to be in a stopped state.

In the states D1 and D2, the control circuit 22 controls each switch so that the switch SW0 does not select either the P terminal or the N terminal, the switch SW1 is turned off, and the switch SW2 selects the P terminal. do. In this state, the drive circuit 21 is assumed to be in a stopped state. As a result, the voltage applied to the N terminal of the switch SW0 becomes a boosted voltage obtained by adding the capacitor voltage Vc1 to the voltage Vbat in the battery.

In the states E1 and E2, the control circuit 22 controls each switch so that the switch SW0 selects the N terminal, the switch SW1 is turned off, and the switch SW2 selects the P terminal. In this state, the drive circuit 21 is assumed to be in a stopped state. As a result, a boosted voltage obtained by adding the capacitor voltage Vc1 to the voltage Vbat by the battery is given to the drive circuit 21 as the input voltage Vs1. Then, in the state F, the heater control based on the boosted voltage is performed by operating the drive circuit 21.

Next, the steady control sequence will be described. The steady control sequence controls the drive circuit 21 so as to control the heater 31 near the target temperature based on the thermistor temperature obtained from the temperature sensor 32, and this state is referred to as a state PF. The state PF is performed during the period when the heater control signal PF is in the ON state. In this state PF, the control circuit 22 controls each switch so that the switch SW0 selects the P terminal, the switch SW1 is turned off, and the switch SW2 selects the N terminal. That is, during the period during which the steady control sequence is being performed, the other end of the capacitor 24 is grounded and one end is disconnected from the drive circuit 21 and the capacitor charging power supply 23. Further, during the steady control sequence, the drive circuit 21 supplies electric power to the heater 31 based on the battery voltage Vbat.

Next, the charging sequence will be described. The charging sequence is executed when the heater control signal PF is in the off state, the charging instruction signal CHARGE is in the on state, and the difference between the boost voltage (Vboost) and the battery voltage Vbat is equal to or less than the third threshold value V3. Will be done. The charging instruction signal CHARGE is a signal transmitted from the host system. Since the charging sequence is performed when the heater control signal PF is in the off state, neither the quick warming sequence nor the steady control sequence is performed, and the charging sequence is performed during the period when the drive circuit 21 is stopped.

The third threshold value V3 is, for example, a value smaller than the first threshold value V1 and larger than the second threshold value V2. More preferably, the third threshold value V3 is preferably a value about 0.1 lower than the first threshold value V1. This is because by setting the third threshold value V3 to such a value, it is possible to maintain a state in which a large number of discharges are possible in the quick warming sequence.

In the charging sequence, the charging state B is reached via the state A21. Then, in the state B, the charging instruction signal CHARGE is turned off, or the difference between the battery voltage Vbat and the boosted voltage Vboss becomes equal to or higher than the first threshold value V1, and the process ends through the state A22.

In the states A21 and A22, the control circuit 22 controls each switch so that the switch SW0 selects the P terminal, the switch SW1 is turned off, and the switch SW2 selects the N terminal. After that, in the state B, the control circuit 22 controls each switch so that the switch SW0 selects the P terminal, the switch SW1 is turned on, the switch SW2 selects the N terminal, and the capacitor. The charging power supply 23 is controlled to be on. As a result, in the charging sequence, the capacitor charging power supply 23 is in a state of charging the capacitor 24 connected between the output terminal and the ground terminal of the capacitor charging power supply 23.

From the above description, in the heater heating control device 20 according to the first embodiment, the boost voltage generated by raising the capacitor voltage Vc1 with the battery voltage Vbat during the rapid heating period of the heater 31 is supplied to the drive circuit 21. The heating speed of the heater 31 is improved. As a result, in the heater heating control device 20 according to the first embodiment, the voltage generated by the capacitor 24 at the time of boosting voltage purification can be reduced by the battery voltage Vbat, so that the capacity of the capacitor 24 or the number of series stages can be reduced. can.

When a lithium ion capacitor is used as the capacitor 24, the voltage that can be generated by one lithium ion capacitor is small, and it is necessary to increase the number of stages of the lithium ion capacitor in order to generate a large boosted voltage. However, in the heater system 1 according to the first embodiment, it is not necessary to generate a voltage by the lithium ion capacitor for the battery voltage Vbat, and the number of lithium ion capacitors can be reduced with respect to the magnitude of the boosted voltage. Since the lithium ion capacitor has a large volume, the effect of reducing the mounting volume of the heater heating control device 20 by reducing the number of lithium ion capacitors is great.

Further, the heater heating control device 20 according to the first embodiment charges the capacitor 24 with the drive circuit 21 stopped. As a result, in the heater heating control device 20 according to the first embodiment, the timing of power consumption can be dispersed and the peak of power consumption can be suppressed.

Further, when a plurality of small capacitors are used as the capacitor 24, the capacitors can be dispersed in different spaces and stored. When using a plurality of capacitors, even if a specific capacitor is in a discharged state, the power from another capacitor can be used. The present invention does not limit the shape and method of the capacitor to a specific shape. Capacitors can be selected according to the storage space, such as cubes, cylinders, and thin films. The capacitor in the present invention refers to a power storage device, and has a power storage function such as an electrolytic capacitor, a film capacitor, a ceramic capacitor, an electric double layer capacitor, a mica capacitor, an air capacitor, a glass capacitor, a non-polar electrolytic capacitor, and an oil capacitor. If it is a device that has it, the method is not limited.

Furthermore, the electric power from the capacitor may be added only to a specific part of the heater to further improve the temperature rise characteristic of only a part of the heater. In the case of applications that warm the human body, the temperature rise can be felt faster at specific parts of the human body. In such a configuration, for example, the heater heating control device 20 shown in FIG. 1 is used for a part of the heater having a high heating characteristic, and the capacitor charging power supply 23 and the capacitor 24 are removed from the heater heating control device 20. Further, another heater control device including a drive circuit 21 that receives only the power supply from the vehicle power supply 10 is further provided, and this can be realized by heating a heater different from the heater 31 by the other heater control device.

Embodiment 2
In the second embodiment, the heater system 2 which is another embodiment of the heater system 1 according to the first embodiment will be described. In the description of the second embodiment, the same components as those described in the first embodiment are designated by the same reference numerals as those of the first embodiment, and the description thereof will be omitted.

FIG. 3 shows a block diagram of the heater system 2 including the heater heating control device according to the second embodiment. As shown in FIG. 3, the heater system 2 according to the second embodiment has a heater heating control device 40 and a heater unit 50 in place of the heater heating control device 20 and the heater unit 30.

The heater heating control device 40 has a first drive circuit (for example, drive circuit 41) and a second drive circuit (for example, drive circuit 42) instead of the drive circuit 21. Further, the heater heating control device 40 uses the switch SW3 as the first switch and has the switch SW4 which is the third switch. Further, the heater heating control device 40 has a control circuit 43 instead of the control circuit 22. The control circuit 43 is an arithmetic unit capable of executing a program such as a microcomputer like the control circuit 22, and obtains a block and a switch in the heater heating control device 40 from an instruction from a host system (not shown) and a temperature sensor 32. It is controlled based on the thermistor temperature and the capacitor voltage Vc1 of the capacitor 24.

Further, the heater unit 50 has a heater 51 instead of the heater 31. The heater 51 has a first heater 511 and a second heater 512. The first heater 511 and the second heater 512 are divided into two heaters provided in the heater 31, and have, for example, the same resistance value. One end of the first heater 511 is connected to the output terminal of the drive circuit 41, and the other end is connected to one end of the second heater 512. The other end of the second heater 512 is connected to the ground terminal. Then, the connection point between the first heater 511 and the second heater 512 is connected to the output terminal of the drive circuit 42.

In the heater heating control device 40, the battery voltage Vbat is directly input to the drive circuit 41. Further, in the heater heating control device 40, the drive circuit 41 is controlled to a stop state in which the output terminal becomes high impedance during the rapid heating period. To the drive circuit 42, the capacitor voltage Vc1 lifted by the battery voltage Vbat via the switch SW3, which is the first switch, is given as the input voltage Vs2. The switch SW3 switches whether or not to apply the capacitor voltage Vc1 which is the boosted voltage to the drive circuit 42. More specifically, the switch SW3 gives the capacitor voltage Vc1 selectively boosted to the drive circuit 42 as the input voltage Vs2 during the rapid heating period.

Further, the heater heating control device 40 has a switch SW4 which is a third switch. The switch SW4 switches whether or not to apply a ground voltage to one end of the first heater 511 (the end on the side connected to the output terminal of the drive circuit 41). More specifically, the switch SW4 applies a ground voltage to one end of the first heater 511 during the rapid heating period.

That is, in the heater system 2 according to the second embodiment, the heater heating control device 40 has a first drive circuit (for example, a drive circuit 41) and a second drive circuit (for example, a drive circuit 42) as a drive circuit. The heater unit 50 has a first heater 511 and a second heater 512 connected in series between the output terminal of the drive circuit 41 and the ground terminal to which the ground voltage is applied as a heater. Further, the output terminal of the drive circuit 42 is connected between the other end of the first heater 511 and one end of the second heater 512. Further, the heater heating control device 40 further has a third switch for switching whether or not to apply a ground voltage to one end of the second heater 512. Then, in the control circuit 43, the drive circuit 41 is stopped in the rapid heating period, and the drive circuit 42 supplies electric power to the first heater 511 and the second heater 512 connected in parallel based on the capacitor voltage Vc1. In addition, the switch SW3, the switch SW2 and the switch SW4 are controlled. Further, in the control circuit 43, the drive circuit 42 is stopped during the steady control period, and the drive circuit 41 supplies electric power to the first heater 511 and the second heater 512 connected in series based on the battery voltage Vbat. As a result, the switch SW3, the switch SW2, and the switch SW4 are controlled.

Here, the operation of the heater heating control device 40 according to the second embodiment will be described. Therefore, FIG. 4 shows a state transition diagram illustrating the control sequence of the heater heating control device 40 according to the second embodiment. As shown in FIG. 4, the state transition of the control sequence does not change even in the heater heating control device 40 according to the second embodiment. However, in the heater heating control device 40 according to the second embodiment, the state of the switch in each state is different from the heater heating control device 20 according to the first embodiment in the first embodiment. Therefore, in the following, switching on / off of the switch in each state of the heater heating control device 40 according to the second embodiment will be described.

First, in the standby state A and the state PF during the steady control sequence, the control circuit 43 connects the switch SW1 to the off state, the switch SW2 to the N terminal side connected to the ground terminal, and turns off the switch SW3. The state, the drive circuit 42 is stopped, and the switch SW4 is turned off. By setting such a switch state, in the state A and the state PF, it becomes possible to supply electric power to the first heater 511 and the second heater 512 connected in series by the drive circuit 42. In the state A, the drive circuit 42 is stopped, and the power supply to the heater 51 is stopped.

Subsequently, in the states C1 and C2 during the quick warming sequence, the control circuit 43 sets the switch SW1 in the off state, the switch SW2 in the off state in which neither the P terminal nor the N terminal is selected, the switch SW3 in the off state, and the drive circuit 42. The stop state and the switch SW4 are turned off.

Further, in the states D1 and D2 during the quick warming sequence, the control circuit 43 connects the switch SW1 to the P terminal side to which the battery voltage Vbat is given, the switch SW3 is in the off state, and the drive circuit 42. Is stopped, and the switch SW4 is turned off.

Further, in the states E1 and E2 during the quick warming sequence, the control circuit 43 connects the switch SW1 to the P terminal side to which the battery voltage Vbat is given, the switch SW3 is on, and the drive circuit 42 is in the off state. Is stopped, and the switch SW4 is turned on.

Then, in the state F in which the heater is controlled in the quick warming sequence, the control circuit 43 connects the switch SW1 to the P terminal side to which the battery voltage Vbat is given, the switch SW3 is turned on, and the drive circuit 42. Is in the operating state, and the switch SW4 is in the on state. In this way, by setting the state F through the states C1, D1 and E1, the first heater 511 and the second heater 512 connected in parallel are driven by the drive circuit 42 based on the boosted capacitor voltage Vc1. It becomes.

Subsequently, in the states A21 and A22 during the charging sequence, the control circuit 43 connects the switch SW1 to the N terminal side connected to the ground terminal, the switch SW3 to the off state, and the drive circuit 42. The stop state and the switch SW4 are turned off. Further, in the charging state B during the charging sequence, the control circuit 43 connects the switch SW1 to the N terminal side connected to the ground terminal, the switch SW3 to the off state, and the drive circuit. It is assumed that the 42 is controlled to be in the stopped state, the switch SW4 is in the off state, and the capacitor charging power supply 23 is controlled in the on state. As a result, in the heater heating control device 40 according to the second embodiment, the capacitor 24 is charged by the capacitor charging power supply 23 with the drive circuit 41 and the drive circuit 42 stopped.

From the above description, in the heater heating control device 40 according to the second embodiment, electric power is supplied to the first heater 511 and the second heater 512 whose resistance value is lowered by being connected in parallel during the rapid heating period. can do. The heating temperature of the heater has a characteristic that is proportional to the magnitude of the electric power supplied to the heater, but if the resistance value of the heater is small, the drive circuit 21 can be in the rapid heating period even if the voltage output by the drive circuit 42 is low. It is possible to output a current larger than the output current. That is, in the heater system 2 according to the second embodiment, it is possible to generate heat to the same extent as the heater system 1 while lowering the output voltage of the drive circuit 42 than that of the drive circuit 21.

Thereby, in the heater heating control device 40 according to the second embodiment, the voltage of the capacitor voltage Vc1 can be made lower than that of the first embodiment. That is, in the heater heating control device 40 according to the second embodiment, the number of series stages of the lithium ion capacitors constituting the capacitor 24 is reduced, and the mounting volume of the capacitor 24 is made smaller than the capacitor 24 according to the first embodiment. Can be done. As for the number of series stages of the lithium ion capacitors constituting the capacitor 24, for example, when five stages are required in the first embodiment, sufficient heat generation can be obtained in one stage in the second embodiment.

Embodiment 3
In the third embodiment, the heater heating control device 60, which is another embodiment of the heater heating control device 20 according to the first embodiment, will be described. In the description of the third embodiment, the same components as those described in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

FIG. 5 shows a block diagram of a heater system including the heater heating control device 60 according to the third embodiment. As shown in FIG. 5, the heater heating control device 60 excludes the switch SW2 of the heater heating control device 20 of the first embodiment. Then, in the heater heating control device 60, the other end of the capacitor 24 is directly connected to the ground terminal. That is, in the heater heating control device 60 according to the third embodiment, the capacitor voltage is not boosted by the battery voltage Vbat. Therefore, in the heater heating control device 60, the capacitor 24 is configured so that the boosted voltage Vc2, which is a voltage value obtained by adding the battery voltage Vbat and the capacitor voltage Vc1 to the capacitor 24, can be output.

Subsequently, the operation of the heater heating control device 60 according to the third embodiment will be described. FIG. 6 shows a state transition diagram illustrating a control sequence of the heater heating control device 60 according to the third embodiment.

As shown in FIG. 6, the control sequence of the heater heating control device 60 according to the third embodiment excludes the states A21 and A22 and the states D1 and D2 required for switching the switch SW2 of the first embodiment. ..

In the heater system 3 according to the third embodiment, although a higher voltage than that of the first embodiment is required as the boost voltage Vc2 generated by the capacitor 24, the capacitor 24 is charged while the drive circuit 21 is stopped. The heater 31 is heated only by the electric power output from the capacitor 24 during the rapid heating period. That is, in the heater system 3 according to the third embodiment, the heater 31 is heated only by the heater heating control device 60 during the rapid heating period. As a result, in the heater system 3 according to the third embodiment, no current flows through the battery wiring W1 during the rapid heating period, so that the battery wiring W1 supplies the battery wiring W1 to the drive circuit 21 to drive the heater 31. The wiring diameter can be the same as in the case.

Embodiment 4
In the fourth embodiment, the heater heating control device 70, which is another embodiment of the heater heating control device 40 according to the second embodiment, will be described. In the description of the fourth embodiment, the same components as those described in the first and second embodiments are designated by the same reference numerals as those of the first and second embodiments, and the description thereof will be omitted.

FIG. 7 shows a block diagram of a heater system including the heater heating control device 70 according to the fourth embodiment. As shown in FIG. 7, the heater heating control device 70 excludes the switch SW2 of the heater heating control device 40 of the second embodiment. Then, in the heater heating control device 70, the other end of the capacitor 24 is directly connected to the ground terminal. That is, in the heater heating control device 70 according to the fourth embodiment, the capacitor voltage is not boosted by the battery voltage Vbat. Therefore, in the heater heating control device 70, the capacitor 24 is configured so that the boosted voltage Vc2, which is a voltage value obtained by adding the battery voltage Vbat and the capacitor voltage Vc1 to the capacitor 24, can be output.

Subsequently, the operation of the heater heating control device 70 according to the fourth embodiment will be described. FIG. 8 shows a state transition diagram illustrating a control sequence of the heater heating control device 70 according to the fourth embodiment.

As shown in FIG. 8, the control sequence of the heater heating control device 70 according to the fourth embodiment excludes the states A21 and A22 and the states D1 and D2 required for switching the switch SW2 of the second embodiment. ..

In the heater system 4 according to the fourth embodiment, the booster voltage Vc2 generated by the capacitor 24 requires a higher voltage than that of the second embodiment, but the capacitor 24 is charged while the

drive circuits

41 and 42 are stopped. Then, the heater 51 is heated only by the electric power output from the capacitor 24 during the rapid heating period. That is, in the heater system 4 according to the fourth embodiment, the heater 51 is heated only by the heater heating control device 70 during the rapid heating period. As a result, in the heater system 4 according to the fourth embodiment, the amount of current flowing through the battery wiring W1 during the rapid heating period and the amount of current flowing through the battery wiring W1 during the steady control period can be suppressed, so that the heater system 4 is driven only by the battery voltage. The battery wiring W1 can be made thinner than supplying the

circuits

41 and 42 to drive the heater 51.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit. For example, the above embodiment includes the viewpoint shown in the following appendix.

(Appendix 1)
A capacitor that outputs a boosted voltage higher than the battery voltage given from the outside from one end,
A capacitor charging power source that stores electric power in the capacitor,
The drive circuit that supplies power to the heater and
A switching circuit that switches the connection relationship between the capacitor, the capacitor charging power supply, the battery terminal that supplies the battery voltage, and the drive circuit.
It has the drive circuit, the capacitor charging power supply, and the control circuit for controlling the switching circuit.
The control circuit is
During the rapid heating period specified by the host system, the drive circuit and the switching circuit are controlled so that the drive circuit supplies power to the heater based on the boost voltage.
During the steady control period in which the heater is controlled at a temperature near the target value, the drive circuit and the switching circuit are controlled so that the drive circuit supplies electric power to the heater based on the battery voltage.
A heater heating control device that controls the drive circuit, the capacitor charging power supply, and the switching circuit so that the capacitor is charged with electric power from the capacitor charging power supply during a pause period in which the drive circuit is stopped.

(Appendix 2)
The heater heating control device according to Appendix 1, wherein the switching circuit has a first switch that selects one of the battery voltage and the boosted voltage and gives the switching circuit to the drive circuit.

(Appendix 3)
The heater heating control device according to Appendix 2, wherein the switching circuit further includes a second switch that selects one of the battery voltage and the ground voltage and gives it to the other end of the capacitor.

(Appendix 4)
The heater heating control device according to Appendix 2, which is connected to a ground terminal to which a ground voltage is supplied to the other end of the capacitor.

(Appendix 5)
The drive circuit has a first drive circuit and a second drive circuit.
The switching circuit has a first switch for switching whether or not to apply the boosted voltage to the second drive circuit.
The heater heating control device according to Appendix 1, wherein the battery voltage is applied to the first drive circuit.

(Appendix 6)
The heater heating control device according to Appendix 5, wherein the switching circuit further includes a second switch that selects one of the battery voltage and the ground voltage and gives it to the other end of the capacitor.

(Appendix 7)
The heater has a first heater and a second heater connected in series between an output terminal of the first drive circuit and a ground terminal to which a ground voltage is applied.
The output terminal of the second drive circuit is connected between the other end of the first heater and one end of the second heater.
The heater heating control device further includes a third switch for switching whether or not to apply the ground voltage to one end of the first heater.
The control circuit is
During the rapid heating period, the first drive circuit is stopped, and the second drive circuit supplies electric power to the first heater and the second heater connected in parallel based on the capacitor voltage. In addition, the first switch, the second switch, and the third switch are controlled.
During the steady control period, the second drive circuit is stopped, and the first drive circuit supplies electric power to the first heater and the second heater connected in series based on the battery voltage. As described in Appendix 6, the heater heating control device for controlling the first switch, the second switch, and the third switch.

(Appendix 8)
The heater heating control device according to Appendix 5, which is connected to a ground terminal to which a ground voltage is supplied to the other end of the capacitor.

(Appendix 9)
The heater heating control device according to any one of Supplementary note 1 to 8, wherein the capacitor is a lithium ion capacitor that maintains a constant output voltage and outputs electric power.

This application claims priority based on Japanese application Japanese Patent Application No. 2020-181170 filed on October 29, 2020, and incorporates all of its disclosures herein.

1-4 Heater system 10

Vehicle power supply

20, 40, 60, 70 Heater

heating control device

21, 41, 42

Drive circuit

22, 43 Control circuit 23 Capacitor charge power supply 24

Capacitor

30, 50

Heater unit

31, 51 Heater 32 Temperature sensor 511 1st heater 512 2nd heater SW0 to SW4 switch W1 Battery wiring Vbat Battery voltage Vc1 Capacitor voltage Vc2 Boost voltage Vs1 Input voltage Vs2 Input voltage PF Heater control signal BOOST Boost signal CHARGE Charging instruction signal

Claims

The drive circuit that supplies power to the heater and
A first switch that selects and gives either a battery voltage or a capacitor voltage to the drive circuit,
A capacitor that outputs the capacitor voltage from one end,
A capacitor charging power source that stores electric power in the capacitor,
A second switch that selectively gives a battery voltage and a ground voltage given from the outside to the other end of the capacitor,
It has the drive circuit, the capacitor charging power supply, the first switch, and a control circuit for controlling the second switch.
The control circuit is
During the rapid heating period specified by the host system, the second switch is controlled so that the battery voltage is applied to the other end of the capacitor, and the drive circuit supplies power to the heater based on the capacitor voltage. Control the drive circuit and the first switch so as to
A heater heating control device that controls the drive circuit and the first switch so that the drive circuit supplies electric power to the heater based on the battery voltage during a steady control period in which the heater is controlled at a temperature near a target value.
The control circuit controls the second switch so that the capacitor is charged with electric power from the capacitor charging power source and the ground voltage is applied to the other end of the capacitor during a pause period when the drive circuit is stopped. The heater heating control device according to claim 1.
The drive circuit has a first drive circuit and a second drive circuit.
The heater has a first heater and a second heater connected in series between an output terminal of the first drive circuit and a ground terminal to which a ground voltage is applied.
The output terminal of the second drive circuit is connected between the other end of the first heater and one end of the second heater.
The heater heating control device further includes a third switch for switching whether or not to apply the ground voltage to one end of the first heater.
The control circuit is
During the rapid heating period, the first drive circuit is stopped, and the second drive circuit supplies electric power to the first heater and the second heater connected in parallel based on the capacitor voltage. In addition, the first switch, the second switch, and the third switch are controlled.
During the steady control period, the second drive circuit is stopped, and the first drive circuit supplies electric power to the first heater and the second heater connected in series based on the battery voltage. The heater heating control device according to claim 1 or 2, wherein the first switch, the second switch, and the third switch are controlled.
The heater heating control device according to any one of claims 1 to 3, wherein the capacitor is a lithium ion capacitor that maintains a constant output voltage and outputs electric power.
The drive circuit that supplies power to the heater and
A first switch that selects and gives either a battery voltage or a capacitor voltage to the drive circuit,
A capacitor that outputs the capacitor voltage from one end,
A capacitor charging power source that stores electric power in the capacitor,
A second switch that selectively gives a battery voltage and a ground voltage given from the outside to the other end of the capacitor,
A heater heating control method for a heater heating control device comprising the drive circuit, the capacitor charging power supply, the first switch, and the control circuit for controlling the second switch.
During the rapid heating period specified by the host system, the second switch is controlled so that the battery voltage is applied to the other end of the capacitor, and the drive circuit supplies power to the heater based on the capacitor voltage. Control the drive circuit and the first switch so as to
A heater heating control method for controlling the drive circuit and the first switch so that the drive circuit supplies electric power to the heater based on the battery voltage in a steady control period in which the heater is controlled at a temperature near a target value.
The drive circuit that supplies power to the heater and
A first switch that selects and gives either a battery voltage or a capacitor voltage to the drive circuit,
A capacitor that outputs the capacitor voltage from one end,
A capacitor charging power source that stores electric power in the capacitor,
A second switch that selectively gives a battery voltage and a ground voltage given from the outside to the other end of the capacitor,
A heater heating control program executed by the control circuit of a heater heating control device having the drive circuit, the capacitor charging power supply, the first switch, and the control circuit for controlling the second switch.
The heater heating control program is
During the rapid heating period specified by the host system, the second switch is controlled so that the battery voltage is applied to the other end of the capacitor, and the drive circuit supplies power to the heater based on the capacitor voltage. Control the drive circuit and the first switch so as to
A heater heating control program that controls the drive circuit and the first switch so that the drive circuit supplies electric power to the heater based on the battery voltage during a steady control period in which the heater is controlled at a temperature near a target value.