JP2005318675A - Electrical system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical system which can regulate the temperature of an auxiliary battery which has not been regulated in the temperature heretofore without accompanying a large cost increase. <P>SOLUTION: In an air duct 700, a cooling fan 406, an opening and closing valve (1) 702 and an opening and closing valve (2) 704 are provided. In the air duct 700, a converter (2) 402 and the auxiliary battery 404 are arranged. One of a state that air is supplied serially to the converter (2) 402 and the auxiliary battery 404, a state that air is supplied in parallel to the converter (2) 402 and the auxiliary 404, and a state that air is supplied to the converter (2) 402 and air supply to the auxiliary battery 404 is interrupted is selected in accordance with states of the opening and closing valve (1) 702 and the opening and closing valve (2) 704. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric system, and more particularly, to an electric system provided with a temperature adjusting device for adjusting the temperature of a power source and an electric device.

  In recent years, hybrid vehicles, fuel cell vehicles, and electric vehicles that run with a driving force from a motor have attracted attention as part of measures for environmental problems. Such vehicles are equipped with a traveling battery for storing electric power to be supplied to the motor and electric devices such as a converter and an inverter for adjusting the electric power stored in the battery and supplying the electric power to the motor. Such an electric device generates heat as it operates. Therefore, it is necessary to cool the electrical equipment.

Japanese Patent Laid-Open No. 9-126617 (Patent Document 1) discloses a heat dissipation device for an electric vehicle that can improve the heat dissipation of a power conversion device and a drive motor for traveling that are housed in a hood. The heat dissipating device for an electric vehicle described in Patent Document 1 is disposed under the bonnet of the vehicle and dissipates heat of the power conversion device that generates heat by operation. This electric vehicle heat dissipation device is disposed on the vehicle rear side of the refrigerant tank at a position above the refrigerant tank, in which a refrigerant that absorbs heat from the power converter and encloses a refrigerant that is vaporized by the heat is enclosed, A refrigerant radiator that exchanges heat between the air and the vaporized refrigerant. The bonnet and the refrigerant tank form an air passage for sending air to the refrigerant radiator. As a result, the air that enters the bonnet from the front of the vehicle and is guided to the air passage formed between the bonnet and the refrigerant tank first cools the refrigerant tank, and then cools the refrigerant radiator. Thus, in addition to the refrigerant radiator, the refrigerant tank is also cooled with air, so that the heat dissipation of the power converter is improved.
JP-A-9-126617

  On the other hand, the vehicle is equipped with a power source for auxiliary equipment (for example, auxiliary battery) in addition to the battery for traveling. The voltage of the auxiliary battery is lower than the voltage of the traveling battery. In many vehicles, lead-acid batteries are used for auxiliary batteries. Since lead acid batteries have better thermal characteristics than lithium ion batteries and nickel metal hydride batteries, the need for adjusting the temperature is small. For this reason, in many vehicles, the temperature of the auxiliary battery is not adjusted. Also in the above-mentioned Patent Document 1, the temperature of the auxiliary battery is not adjusted. However, if the temperature of the auxiliary battery is adjusted, deterioration of the auxiliary battery can be suppressed and the performance of the auxiliary battery can be utilized more effectively. However, in the electric vehicle heat dissipation device described in the above-mentioned publication, since a space formed between the bonnet and the refrigerant tank is used as an air passage, a sufficient gap is provided between the bonnet and the refrigerant tank. It is necessary to provide it. Therefore, there is a problem that it is difficult to secure a space for newly installing a device for adjusting the temperature of the auxiliary battery. Moreover, not only the above-mentioned Patent Document 1, but additionally providing a mechanism for adjusting the temperature of only the auxiliary battery contributes to an increase in cost.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to adjust the temperature of a power source that has not been temperature-adjusted in the past without significantly increasing the cost. It is to provide an electrical system.

  An electrical system according to a first aspect of the present invention includes a power source, a high-voltage power source having a voltage higher than that of the power source, an electric device that adjusts the power of the high-voltage power source, and a temperature adjustment device that adjusts the temperature of the electric device. The electrical system includes adjusting means for adjusting the temperature of the power supply using the temperature adjusting device.

  According to 1st invention, an adjustment means adjusts the temperature of a power supply (for example, lead acid battery). Thereby, the temperature of the electric equipment which adjusts the electric power of a high voltage power supply, and a power supply can be adjusted with a single temperature adjusting device. Therefore, the temperature of the power supply can be adjusted without providing a separate temperature adjusting device dedicated to the power supply. As a result, it is possible to provide an electric system capable of adjusting the temperature of the power source while suppressing an increase in cost.

  An electric system according to a second invention includes a power source, an electric device that adjusts electric power, and a temperature adjusting device that adjusts the temperature of the electric device. The temperature adjusting device supplies a heat exchange medium that passes through the electrical equipment to the power source by using the supply means for supplying a heat exchange medium that performs heat exchange between the electrical equipment and the power source. The first state in which the heat exchange medium is supplied in series to the electric device and the power source, the second state in which the heat exchange medium is supplied in parallel to the electric device and the power source, and the heat exchange medium to the electric device and the power source Selecting means for selecting any one of the third states for shutting off the supply of the heat exchange medium.

  According to the second invention, the supply means of the temperature adjusting device supplies a heat exchange medium in which heat is exchanged between the electrical equipment and the power source. The selection unit selects any one of the first state, the second state, and the third state. When the first state is selected, the electric equipment is cooled by exchanging heat with the heat exchange medium, and the power source exchanges heat with the heat exchange medium heated by heat exchange with the electric equipment. Warmed. When the second state is selected, the electric device and the power source are cooled by exchanging heat with the heat exchange medium. When the third state is selected, the electric device is cooled by exchanging heat with the heat exchange medium. Since the supply of the heat exchange medium to the power supply is interrupted, excessive temperature rise and overcooling of the power supply are suppressed. Thereby, the temperature of an electric equipment and a power supply can be adjusted with a single temperature adjusting device. Therefore, the temperature of the power supply can be adjusted without providing a separate temperature adjusting device dedicated to the power supply. As a result, it is possible to provide an electric system capable of adjusting the temperature of the power source while suppressing an increase in cost.

  An electrical system according to a third aspect of the invention further includes a high-voltage power source having a voltage higher than that of the power source in addition to the configuration of the second aspect of the invention. The electrical equipment regulates the power of the high voltage power source.

  According to the third aspect of the invention, the electric power of the high voltage power supply is adjusted by the electric device. Thereby, the temperature of the electric equipment which adjusts the electric power of a high voltage power supply, and a power supply can be adjusted with a single temperature adjusting device.

  In addition to the configuration of the second or third invention, the electric system according to the fourth invention includes a temperature detection means for detecting the temperature of the power source, and a medium for detecting the temperature of the heat exchange medium via the electric device. Temperature detection means. The selection means includes means for selecting the first state when the detected temperature of the power source is lower than the predetermined temperature and the temperature of the heat exchange medium via the electric device.

  According to the fourth invention, the temperature detecting means detects the temperature of the power source, and the medium temperature detecting means detects the temperature of the heat exchange medium via the electric device. When the detected temperature of the power source is lower than the predetermined temperature and the temperature of the heat exchange medium via the electric device, the first state is selected by the selection means. As a result, when the temperature of the power source is low and the power source needs to be warmed, the electric device is cooled by exchanging heat with the heat exchange medium, and the power source is exchanged with the heat exchange medium warmed by the heat exchange. It can be warmed by heat exchange.

  In addition to the configuration of the second or third invention, the electric system according to the fifth invention includes a temperature detecting means for detecting the temperature of the power source, and a medium for detecting the temperature of the heat exchange medium via the electric device. Temperature detection means. The selection means includes means for selecting the third state when the detected temperature of the power source is lower than a predetermined temperature and higher than the temperature of the heat exchange medium via the electric device.

  According to the fifth invention, the temperature detecting means detects the temperature of the power source, and the medium temperature detecting means detects the temperature of the heat exchange medium via the electric device. When the detected temperature of the power source is lower than a predetermined temperature and higher than the temperature of the heat exchange medium passing through the electric device, the third state is selected by the selection unit. As a result, when the temperature of the power source is low and the power source needs to be warmed, the electric equipment is cooled by exchanging heat with the heat exchange medium, and the supply to the power source of the low temperature heat exchange medium is shut off. Power supply overcooling can be suppressed.

  In the electric system according to the sixth invention, in addition to the configuration of the second or third invention, the heat exchange medium is air in the vehicle. The electrical system further includes temperature detecting means for detecting the temperature of the power source and in-vehicle temperature detecting means for detecting the temperature in the vehicle. The selection means includes means for selecting the second state when the detected temperature of the power source is higher than a predetermined temperature and a temperature in the vehicle.

  According to the sixth invention, air in the vehicle is used as the heat exchange medium. The temperature detecting means detects the temperature of the power source, and the in-vehicle temperature detecting means detects the temperature in the vehicle. When the detected temperature of the power source is higher than the predetermined temperature and the temperature in the vehicle, the second state is selected by the selection means. Thereby, when the temperature of the power source is high and the power source needs to be cooled, the electric device and the power source can be cooled by exchanging heat with the air in the vehicle.

  In the electrical system according to the seventh invention, in addition to the configuration of the second or third invention, the heat exchange medium is air in the vehicle. The electrical system further includes temperature detecting means for detecting the temperature of the power source and in-vehicle temperature detecting means for detecting the temperature in the vehicle. The selection means includes means for selecting the third state when the detected temperature of the power source is higher than a predetermined temperature and lower than the temperature in the vehicle.

  According to the seventh invention, air in the vehicle is used as the heat exchange medium. The temperature detecting means detects the temperature of the power source, and the in-vehicle temperature detecting means detects the temperature in the vehicle. When the detected temperature of the power source is higher than a predetermined temperature and lower than the temperature in the vehicle, the third state is selected by the selection means. As a result, when the temperature of the power supply is high and the power supply needs to be cooled, the electrical equipment is cooled by exchanging heat with the air in the vehicle, and the supply of the high-temperature heat exchange medium to the power supply is cut off. And the excessive temperature rise of a power supply can be suppressed.

  In the electrical system according to the eighth aspect of the invention, in addition to the configuration of any one of the first to seventh aspects, the electrical device is a converter that steps down the voltage and supplies power to the power source. The power source is a battery that is charged by the power supplied from the converter.

  According to the eighth aspect of the invention, the temperature of the power source can be adjusted with respect to the temperatures of the converter and the battery.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  With reference to FIG. 1, a vehicle equipped with the electrical system according to the first embodiment of the present invention will be described. This vehicle includes an engine 100, an MG (Motor Generator) (1) 200, a PCU (Power Control Unit) 300, a traveling battery 400, an MG (2) 500, and an ECU (Electronic Control Unit) 600. .

  In the present embodiment, the vehicle is described as a hybrid vehicle on which engine 100 is mounted, but a fuel cell vehicle on which a fuel cell is mounted, an electric vehicle, or the like may be used instead of the hybrid vehicle.

  Engine 100 burns a mixture of fuel and air to rotate a crankshaft (not shown) to generate driving force. The driving force generated by the engine 100 is divided into two paths by the power split mechanism 102. One is a path for driving the wheel 106 via the speed reducer 104. The other is a path for driving MG (1) 200 to generate power.

  MG (1) 200 is driven by the power of engine 100 divided by power split device 102 to generate power. The electric power generated by the MG (1) 200 is selectively used according to the driving state of the vehicle and the SOC (State Of Charge) of the traveling battery 400. For example, during normal traveling or sudden acceleration, the electric power generated by MG (1) 200 is supplied to MG (2) 500 via PCU 300.

  On the other hand, when the SOC of traveling battery 400 is lower than a predetermined value, the power generated by MG (1) 200 is converted from AC power to DC power by inverter 302 of PCU 300, and converter (1) 304 After the voltage is adjusted, the battery is stored in the traveling battery 400.

  The traveling battery 400 is an assembled battery configured by connecting a plurality of battery modules in which a plurality of battery cells are integrated in series. Note that a capacitor may be used instead of the traveling battery 400.

  Part of the electric power stored in battery for traveling 400 is supplied to auxiliary battery 404 after the voltage is lowered by converter (2) 402. The electric power stored in the auxiliary battery 404 is supplied to an air conditioner, an audio device, an electric oil pump, an electric water pump, and other electric devices. The auxiliary battery 404 is a lead storage battery. A nickel metal hydride battery or a lithium ion battery may be used instead of the lead storage battery.

  Converter (2) 402 generates heat during operation. The auxiliary battery 404 generates heat by charging and discharging. The calorific value of converter (2) 402 is larger than the calorific value of auxiliary battery 404, and the temperature of converter (2) 402 is higher than that of auxiliary battery 404. Therefore, it is highly necessary to adjust the temperature of the converter (2) 402 while the vehicle is traveling, and it is necessary to provide a device for adjusting the temperature of the converter (2) 402.

  Converter (2) 402 and auxiliary battery 404 are mounted in a luggage room (trunk room) of the vehicle. Note that converter (2) 402 and auxiliary battery 404 may be mounted in a place other than the luggage room.

  Converter (2) 402 and auxiliary battery 404 are subjected to heat exchange with air supplied by cooling fan 406 to adjust the temperature. The air supplied by the cooling fan 406 is air in the passenger compartment. In this embodiment, the temperatures of converter (2) 402 and auxiliary battery 404 are adjusted by air, but a liquid medium is supplied using a pump, and converter (2) 402 is supplied by the liquid medium. The temperature of the auxiliary battery 404 may be adjusted. In addition to the converter (2) 402, the temperature of the inverter 302 and the converter (1) 304 is adjusted, or at least one of the inverter 302 and the converter (1) 304 is replaced with the converter (2) 402. One of them may be configured to be cooled.

  MG (2) 500 is a three-phase AC rotating electric machine. MG (2) 500 is driven by at least one of the electric power stored in battery for traveling 400 and the electric power generated by MG (1) 200. The driving force of MG (2) 500 is transmitted to wheels 106 via reduction gear 104. Thus, MG (2) 500 assists engine 100 to cause the vehicle to travel, or causes the vehicle to travel only by the driving force from MG (2) 500.

  During regenerative braking of the vehicle, the MG (2) 500 is driven by the wheels 106 via the speed reducer 104, and the MG (2) 500 is operated as a generator. Thereby, MG (2) 500 operates as a regenerative brake that converts braking energy into electric power. The electric power generated by MG (2) 500 is stored in battery 400 via inverter 302 and converter (1) 304.

  ECU 600 is connected to room temperature sensor 602, auxiliary battery temperature sensor 604, and exhaust temperature sensor 606. The room temperature sensor 602 detects the temperature TR in the passenger compartment. Auxiliary battery temperature sensor 604 detects temperature TB of auxiliary battery 404. The exhaust temperature sensor 606 detects the temperature TC of air (exhaust from the converter (2) 402) after heat exchange with the converter (2) 402.

  Signals representing detection results of room temperature sensor 602, auxiliary battery temperature sensor 604, and exhaust temperature sensor 606 are transmitted to ECU 600. ECU 600 is based on a signal transmitted from each sensor, a driving state of the vehicle, an accelerator opening, a change rate of the accelerator opening, a shift position, an SOC and a temperature of traveling battery 400, a map and a program stored in a memory, and the like. To perform arithmetic processing. Thereby, ECU 600 controls the devices mounted on the vehicle so that the vehicle is in a desired driving state.

  With reference to FIG. 2, a ventilation duct 700 that guides air blown from cooling fan 406 to converter (2) 402 and auxiliary battery 402 will be described. The ventilation duct 700 is provided with a cooling fan 406, an on-off valve (1) 702 and an on-off valve (2) 704. The on-off valve (1) 702 and the on-off valve (2) 704 are operated by an actuator. The states of the on-off valve (1) 702 and the on-off valve (2) 704 are controlled by the ECU 600.

  In the ventilation duct 700, a converter (2) 402 and an auxiliary battery 404 are arranged. The temperature of converter (2) 402 and auxiliary battery 404 is integrally adjusted by ventilation duct 700.

  When the on-off valve (1) 702 and the on-off valve (2) 704 are in the state indicated by the solid line in FIG. 2 (hereinafter referred to as on-off valve mode (1)), the air is converted into the converter (2) 402 and the auxiliary machine The battery 404 is supplied in series. In this case, the auxiliary battery 404 is supplied with air warmed by heat exchange with the converter (2) 402 via the converter (2) 402.

  When the on-off valve (1) 702 and the on-off valve (2) 704 are in the state indicated by the dotted line in FIG. 2 (hereinafter referred to as on-off valve mode (2)), the air flows into the converter (2) 402 and the auxiliary machine It is supplied to the battery 404 in parallel.

  When the on-off valve (1) 702 is in a state indicated by a solid line in FIG. 2 and the on-off valve (2) 704 is in a state indicated by a dotted line in FIG. 2 (hereinafter referred to as on-off valve mode (3)), a converter (2) Air is supplied to 402, but the supply of air to auxiliary battery 404 is interrupted.

  With reference to FIG. 3, the control structure of the program executed by ECU 600 in the electrical system according to the present embodiment will be described.

  In step (hereinafter, step is abbreviated as S) 100, ECU 600 detects temperature TB of auxiliary battery 404. In S102, ECU 600 determines whether or not warming up of auxiliary battery 404 is necessary. Whether or not the warm-up is necessary may be determined based on whether or not the temperature TB of the auxiliary battery 404 is lower than a predetermined temperature. When the temperature TB of the auxiliary battery 404 is lower than a predetermined temperature, the output of the auxiliary battery 404 is reduced, so that it is determined that the auxiliary battery 404 needs to be warmed up. If the auxiliary battery 404 needs to be warmed up (YES in S102), the process proceeds to S104. If not (NO in S102), the process proceeds to S200.

  In S104, ECU 600 detects exhaust temperature TC from converter (2) 402. In S106, ECU 600 determines whether exhaust temperature TC is higher than temperature TB of auxiliary battery 404 or not. If exhaust temperature TC is higher than temperature TB of auxiliary battery 404 (YES in S106), the process proceeds to S108. If not (NO in S106), the process proceeds to S110.

  In S108, ECU 600 operates on-off valve (1) 702 and on-off valve (2) 704 so as to be in on-off valve mode (1). In S110, ECU 600 operates on-off valve (1) 702 and on-off valve (2) 704 so as to be in the on-off valve mode (3).

  In S200, ECU 600 determines whether or not it is necessary to cool down auxiliary battery 404. Whether or not the cool-down is necessary may be determined based on whether or not the temperature TB of the auxiliary battery 404 is higher than a predetermined temperature. When the temperature TB of the auxiliary battery 404 is higher than a predetermined temperature, it is determined that the auxiliary battery 404 needs to be cooled down because the degree of progress of the deterioration of the auxiliary battery 404 is large. If it is necessary to cool down auxiliary battery 404 (YES in S200), the process proceeds to S202. If not (NO in S200), the process proceeds to S208.

  In S202, ECU 600 detects a temperature TR in the passenger compartment. In S204, ECU 600 determines whether or not temperature TR in the passenger compartment is lower than temperature TB of auxiliary battery 404. If vehicle interior temperature TR is lower than temperature TB of auxiliary battery 404 (YES in S204), the process proceeds to S206. If not (NO in S204), the process proceeds to S208.

  In S206, ECU 600 operates on-off valve (1) 702 and on-off valve (2) 704 so as to be in the on-off valve mode (2). In S208, ECU 600 operates on-off valve (1) 702 and on-off valve (2) 704 so as to be in the on-off valve mode (3).

  An operation of ECU 600 in the electric system according to the present embodiment based on the above-described structure and flowchart will be described.

  When cooling fan 406 is operated to cool converter (2) 402, temperature TB of auxiliary battery 404 is detected (S100), and whether auxiliary battery 404 needs to be warmed up or not. Is determined (S102).

  If temperature TB of auxiliary battery 404 is low and warming up of auxiliary battery 404 is necessary to suppress a decrease in output of auxiliary battery 404 (YES in S102), the exhaust temperature from converter (2) 402 TC is detected (S104).

  If exhaust temperature TC is higher than temperature TB of auxiliary battery 404 (YES in S106), as shown in FIG. 4, on-off valve (1) 702 and on-off valve (2) 704 are in on-off valve mode (1). (S108).

  In this case, converter (2) 402 is cooled by heat exchange with air supplied by cooling fan 406. Auxiliary battery 404 is warmed up by heat exchange with air heated by heat exchange with converter 402.

  If exhaust temperature TC is lower than temperature TB of auxiliary battery 404 (NO in S106), as shown in FIG. 5, on-off valve (1) 702 and on-off valve (2) 704 are in on-off valve mode (3). (S110).

  In this case, converter (2) 402 is cooled by heat exchange with air supplied by cooling fan 406. Since the supply of air to the auxiliary battery 404 is interrupted, heat exchange between the auxiliary battery 404 and the air is suppressed. Therefore, when the temperature of auxiliary battery 404 is low and warm-up is necessary, overcooling of auxiliary battery 404 can be suppressed.

  On the other hand, when warm-up of auxiliary battery 404 is not necessary (NO in S102), it is determined whether or not cool-down of auxiliary battery 404 is necessary (S200). When temperature TB of auxiliary battery 404 is high and the degree of progress of deterioration of auxiliary battery 404 is large, if the auxiliary battery 404 needs to be cooled down (YES in S200), the temperature TR in the vehicle compartment is detected. (S202).

  If vehicle interior temperature TR is lower than temperature TB of auxiliary battery 404 (YES in S204), as shown in FIG. 6, on-off valve (1) 702 and on-off valve (2) 704 are in on-off valve mode ( 2) (S206). In this case, converter (2) 402 and auxiliary battery 404 are cooled by heat exchange with air supplied by cooling fan 406.

  If vehicle interior temperature TR is higher than temperature TB of auxiliary battery 404 (NO in S204), as shown in FIG. 5 described above, on-off valve (1) 702 and on-off valve (2) 704 are on-off valves. It is operated so as to be in mode (3) (S206).

  In this case, converter (2) 402 is cooled by heat exchange with air supplied by cooling fan 406. Since the supply of air to the auxiliary battery 404 is interrupted, heat exchange between the auxiliary battery 404 and air is suppressed. Therefore, in the state where the temperature of auxiliary battery 404 is low and cool-down is necessary, an excessive temperature increase of auxiliary battery 404 can be suppressed.

  If warm-up of auxiliary battery 404 is not required (NO in S102) and cool-down is not required (NO in S200), as shown in FIG. 5 described above, on-off valve (1) 702 and on-off valve (2) The 704 is operated so as to be in the on-off valve mode (3) (S206).

  In this case, converter (2) 402 is cooled by heat exchange with air supplied by cooling fan 406. Since the supply of air to the auxiliary battery 404 is interrupted, heat exchange between the auxiliary battery 404 and air is suppressed. Therefore, warm-up and cool-down of auxiliary battery 404 are not performed.

  As described above, in the electric system according to the embodiment, the converter (2) and the auxiliary battery are arranged in the ventilation duct. According to the state of the on-off valve (1) and on-off valve (2), air is supplied to the converter (2) and the auxiliary battery in series, and air is supplied to the converter (2) and the auxiliary battery in parallel. One state is selected from a state to be performed and a state to supply air to the converter (2) and to block the supply of air to the auxiliary battery. Thereby, the temperature of the converter and the auxiliary battery can be integrally adjusted by using a device that is always provided to adjust the temperature of the converter. Therefore, the temperature of the auxiliary battery can be finely adjusted in a space-saving manner.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a control block diagram which shows the vehicle carrying the electric system which concerns on embodiment of this invention. It is a figure which shows a ventilation duct. It is a flowchart which shows the control structure of the program which ECU runs in the electric system which concerns on embodiment of this invention. It is a figure which shows the state of on-off valve mode (1). It is a figure which shows the state of on-off valve mode (3). It is a figure which shows the state of on-off valve mode (2).

Explanation of symbols

  100 engine, 200 MG (1), 300 PCU, 302 inverter, 304 converter (1), 400 battery for traveling, 402 converter (2), 404 auxiliary battery, 406 cooling fan, 500 MG (2), 600 ECU, 602 Room temperature sensor, 604 Auxiliary battery temperature sensor, 606 Exhaust temperature sensor, 700 Ventilation duct, 702 Open / close valve (1), 704 Open / close valve (2).

Claims (8)

An electric system that is mounted on a vehicle and includes a power source, a high-voltage power source having a voltage higher than that of the power source, an electric device that adjusts power of the high-voltage power source, and a temperature adjustment device that adjusts the temperature of the electric device There,
The electric system includes an adjusting unit for adjusting the temperature of the power source using a temperature adjusting device. An electric system mounted on a vehicle and including a power source, an electric device for adjusting electric power, and a temperature adjusting device for adjusting a temperature of the electric device,
The temperature adjusting device is:
Supply means for supplying a heat exchange medium in which heat is exchanged between the electrical equipment and the power source;
A first state in which the heat exchange medium is supplied in series to the electric device and the power source so that the heat exchange medium via the electric device is supplied to the power source using the supply means, the heat exchange medium A second state in which the heat exchange medium is supplied in parallel to the electric device and the power source, and a third state in which the heat exchange medium is supplied to the electric device and the supply of the heat exchange medium to the power source is shut off. An electrical system comprising: selection means for selecting any one state. The electrical system further includes a high voltage power supply having a higher voltage than the power supply,
The electric system according to claim 2, wherein the electric device adjusts electric power of the high-voltage power supply. The electrical system
Temperature detecting means for detecting the temperature of the power source;
Medium temperature detecting means for detecting the temperature of the heat exchange medium via the electric device,
The selection means includes means for selecting the first state when a temperature of the detected power source is lower than a predetermined temperature and a temperature of a heat exchange medium via the electric device. Item 4. The electrical system according to Item 2 or 3. The electrical system
Temperature detecting means for detecting the temperature of the power source;
Medium temperature detecting means for detecting the temperature of the heat exchange medium via the electric device,
The selection means includes means for selecting the third state when the detected temperature of the power source is lower than a predetermined temperature and higher than the temperature of the heat exchange medium via the electric device. The electrical system according to claim 2 or 3, comprising: The heat exchange medium is air in the vehicle,
The electrical system
Temperature detecting means for detecting the temperature of the power source;
A vehicle temperature detection means for detecting the temperature in the vehicle,
The said selection means includes a means for selecting the said 2nd state, when the temperature of the said detected power supply is higher than the predetermined temperature and the temperature in the said vehicle, The said 2nd state is included. Electrical system. The heat exchange medium is air in the vehicle,
The electrical system
Temperature detecting means for detecting the temperature of the power source;
A vehicle temperature detection means for detecting the temperature in the vehicle,
The selection means includes means for selecting the third state when a temperature of the detected power source is higher than a predetermined temperature and lower than a temperature in the vehicle. 3. The electrical system according to 3. The electrical device is a converter that steps down a voltage and supplies power to the power source,
The electric system according to claim 1, wherein the power source is a battery that is charged by electric power supplied from the converter.

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