JP2012239344A - Warm-up device of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform heating of a battery and warming indoor of a vehicle while suppressing the power consumption of the battery that is the power source of the electric vehicle in the warm-up device of the electric vehicle.SOLUTION: If the temperature of the battery (2) is under a reference temperature, and when at least either the cases determined that the battery (2) cannot be heated over the reference temperature by using a first fluid, or that the operation request of the air conditioning apparatus (6) is detected and it is determined that the hot air of the desired temperature cannot be obtained, a control means (33) heats the first fluid or the second fluid by operating either a first heater (16) or a second heater (21) that is shorter in the necessary operation time, and supplies heated the first fluid or the second fluid to the battery (2) or the air conditioning apparatus (6).

Description

  The present invention relates to a warming-up device for an electric vehicle, and more particularly to a warming-up device for an electric vehicle that uses the electric power of a battery that is a power source of the electric vehicle to heat the battery and heat the vehicle interior.

A battery is mounted on an electric vehicle that uses electricity as a power source for traveling the vehicle. The battery has a characteristic that the output power changes depending on the battery temperature, and there is a temperature at which the battery can operate efficiently.
On the other hand, since the electric vehicle does not include a large heat source such as an internal combustion engine, it is necessary to include a heating device for heating the battery.

JP-A-8-22845

  A battery heat retention device for an electric vehicle according to Patent Document 1 includes a combustion heater that heats by a combustion action as a means for heating the battery, and uses the electric power of the battery while the electric vehicle is running. The battery can be heated without using the electric power of the battery, which is the power source of the electric vehicle, without using the heating wire heater that heats the battery. Makes it possible to operate efficiently.

By the way, in the above-mentioned Patent Document 1, it is necessary to provide a structure and fuel for mounting a combustion heater, which causes a limitation on the vehicle layout, and reduces the amount of battery that can be mounted. There was a risk that the travelable distance would be reduced.
In addition, since there is a problem of environmental problems and fuel depletion, there is a possibility that the combustion heater cannot be used in the future.
Thus, it is preferable that many batteries for running the vehicle can be mounted on the electric vehicle, and it has been desired that the electric vehicle can be run and the battery can be heated by efficiently using the electric power of the battery.

  Accordingly, an object of the present invention is to provide a warming-up device for an electric vehicle that heats the battery and heats the interior of the vehicle while suppressing power consumption of the battery that is a power source of the electric vehicle.

  The present invention detects a temperature of the battery in a warming-up device for an electric vehicle that is driven by electric power and includes a battery that is a power source of the electric vehicle and a motor that is operated by the electric power of the battery to drive the vehicle. A battery temperature sensor is provided, and a first flow path through which the first fluid flows and a second flow path through which the second fluid having a higher temperature rising speed than the first fluid flow are provided, and the battery includes the first flow path and the first flow path. Two flow paths pass through and exchange heat with the first fluid and the second fluid. The first flow path is a temperature of the first fluid and the first pump that pumps the first fluid and the first fluid. A first temperature sensor for detecting the first fluid, a first heater for heating the first fluid using electric power of the battery, and a bypass circuit for bypassing the battery and flowing the first fluid. The path pumps the second fluid A second temperature sensor for detecting the temperature of the second fluid, and a second heater for heating the second fluid using electric power of the battery, The air conditioner has a structure through which the first fluid and the second fluid pass, and includes an operation request detection unit that detects whether there is an operation request to the air conditioner, and the battery. The temperature is less than the reference temperature, and the battery cannot be heated to the reference temperature or higher using the first fluid, or it is determined that the operation request for the air conditioner is detected and hot air at a desired temperature cannot be obtained. When at least one of the above cases is established, the first fluid or the second fluid is heated by operating one of the first heater or the second heater that has a short required operation time, This was warm The first fluid or the second fluid, characterized in that a control means for supplying to the battery or the air conditioner.

  The warming-up device for an electric vehicle according to the present invention can heat the battery and heat the vehicle interior while suppressing power consumption of the battery that is a power source of the electric vehicle.

FIG. 1 is a system configuration diagram of a warm-up device for an electric vehicle. (Example) FIG. 2 is a block diagram of a warm-up device for an electric vehicle. (Example) FIG. 3 is a flowchart of warm-up control of the electric vehicle. (Example) FIG. 4 is a flowchart of warm-up control of the electric vehicle following FIG. (Example) FIG. 5 is another flowchart of the warm-up control of the electric vehicle following FIG. (Example)

  The present invention is provided with two fluids having different temperature rising speeds for the purpose of heating the battery and heating the vehicle interior while suppressing power consumption of the battery that is a power source of the electric vehicle. The battery is provided with a flow path that can pass through each battery.

1 to 5 show an embodiment of the present invention.
In FIG. 1, 1 is a warm-up device mounted on an electric vehicle (hereinafter referred to as “vehicle”) that runs on electric power, 2 is a battery that is a power source of the vehicle, and 3 is operated by the electric power of the battery 2 to drive the vehicle. A motor to be driven, 4 is an inverter that converts DC power of the battery 2 into AC power, 5 is a radiator that reduces the temperature of a first fluid (first cooling water as a first medium), and 6 is a vehicle interior of the vehicle. It is an air conditioner that blows warm air.
The battery 2 is provided with a battery temperature sensor 7 that detects the temperature of the battery 2 (battery temperature).
The air conditioner 6 includes a first flow path 8 through which a first fluid (first cooling water as a first medium) flows, and a second fluid (second cooling as a second medium) whose heating rate is higher than that of the first fluid. A closed circuit 10 having a second flow path 9 through which water flows is provided. The second fluid has a characteristic that the heat capacity is smaller than that of the first fluid and the rate of temperature increase is faster than that of the first fluid.
The battery 2 has a structure through which the first flow path 8 and the second flow path 9 pass, and exchanges heat (transfers heat) with the first fluid and the second fluid.
The air conditioner 6 has a structure through which the first flow path 8 and the second flow path 9 pass, and radiates the heat of the first fluid that flows through the first flow path 8 and the second fluid that flows through the second flow path 9. 11 and an operation request detection unit 12 that detects the presence or absence of an operation request to the air conditioner 6.

The first flow path 8 includes a first path 13 through which the first fluid flows from the battery 2 and returns to the battery again.
The first flow path 8 is a first temperature sensor that detects the temperature of the radiator 5, the inverter 4, the motor 3, and the first fluid provided with the first pump 14 that pumps the first fluid on the first path 13. 15 and a first heater (PCT heater) 16 that heats the first fluid using electric power of the battery 2 and a first control valve 17, and the first control valve 17 is connected to the battery 2. A second path 18 and a bypass circuit 20 that bypasses the battery 2 from the first control valve 17 and is connected to the first connection portion 19 of the first path 13 to flow the first electrothermal fluid are provided.

The second flow path 9 includes a second heater 21 that heats the second fluid using the electric power of the battery 2, a second pump 22 that is provided in the second heater 21 and pumps the second fluid, Between the second pump 22 and the heater core 11 of the air conditioner 6, a third path 23, a fourth path 24 parallel to the third path 23, and a temperature of the second fluid are provided in the third path 23. The second temperature sensor 25 to be detected and the second control valve 26 as the second flow rate adjustment valve, the fifth path 27 connecting the second control valve 26 and the battery 2, the battery 2 and the fourth And a sixth path 29 connected to the second connecting portion 28 of the path 24.
The third control valve 30 as the first flow rate adjusting valve provided in the first heater 16 and the heater core 11 of the air conditioner 6 are connected by a seventh path 31.
The second control valve (second flow rate adjustment valve) 26 and the third control valve 30 (first flow rate adjustment valve) are a first fluid or a second fluid supplied to the battery 2 and the air conditioner 6. The flow rate adjusting structure for adjusting the respective flow rates is configured.
Further, the eighth path 32 of the heater core 11 of the air conditioner 6 is connected to the first connection portion 19 of the first path 13.

Further, the warm-up device 1 is provided with a control means (control unit) 33 as shown in FIG.
On the input side, the control means 33 communicates with the battery temperature sensor 7, the air conditioner operation request detection unit 12, the first temperature sensor 15, the second temperature sensor 25, the ignition switch 34, and the outside air temperature sensor 35. On the output side, the first pump 14, the first heater 16, the first control valve 17, the second heater 21, the second pump 22, the second control valve 26, and the third control valve 30 communicate with each other. doing.
The control means 33 activates or deactivates the first heater 16 and the second heater 21 on the output side according to various output results from the input side, and the first control valve 17 and the second control valve 26. And the third control valve 30 are controlled.

The control means 33 detects that the temperature of the battery 2 is lower than the reference temperature and the battery 2 cannot be heated to a reference temperature or higher using the first fluid or the operation request of the air conditioner 6 is detected and the hot air at a desired temperature is generated. When at least one of the cases where it is determined that the first heater 16 or the second heater 21 is determined to be unsatisfactory is established, either the first heater 16 or the second heater 21 having a short required operation time is operated to add the first fluid or the second fluid. The heated first fluid or the second fluid is supplied to the battery 2 or the air conditioner 6.
Moreover, the control means 33 is the 1st predetermined temperature which is the temperature of the 1st fluid or the 2nd fluid for obtaining the warm air of the temperature which the air conditioner 6 desires, and the 2nd which can heat the battery 2 more than reference temperature. The second predetermined temperature, which is the temperature of one fluid or the second fluid, is set, and the first predetermined temperature and the second predetermined temperature are detected when the temperature of the battery 2 is lower than the reference temperature and an operation request for the air conditioner 6 is detected. When the first predetermined temperature is determined to be greater than the first predetermined temperature, the first heater 16 or the second heater 21 is operated for a shorter required operation time, and the first fluid or the first fluid The two fluids are heated to the second predetermined temperature, and the amount of the heated first fluid or second fluid supplied to the air conditioner 6 is increased.
In this embodiment, by providing the outside air temperature sensor 35, it can be used for warm-up temperature control such as the battery 2 and indoor heating, temperature adjustment in other components, and the like.

Hereinafter, the first flow path 8 will be described in detail.
When the first pump 14 is operated, the first fluid flows through the first path 13. In this case, the first fluid flows through the seventh path 31 by opening the third control valve 30. The third control valve 30 is a first flow rate adjustment valve that can adjust the flow rate of the first fluid flowing through the seventh path 31. In the second path 18 and the detour 20, the first fluid flows into either the second path 18 or the detour 20 by the first control valve 17.
Thereby, the first fluid is heated by waste heat due to the operation of the inverter 4 and the motor 3 or by heating by the first heater 16. Moreover, the temperature of the first fluid is reduced by the first fluid passing through the radiator 5.
In addition, when the third control valve 30 is opened, the first fluid flows through the seventh path 31, and the first fluid that has passed through the heater core 11 returns to the radiator 5. When the first fluid passes through the heater core 11, the first fluid radiates heat in the heater core 11, and the air conditioner 6 blows warm air into the vehicle interior.
The bypass 20 is a path that bypasses the battery 2, and the first fluid flows to the second path 18 or the bypass 20 by the first control valve 17, and then the first fluid returns to the radiator 5.
On the other hand, the first fluid does not always flow through the second path 18 and the detour 20, and the following predetermined condition is satisfied, whereby the second path 18, the detour 20, the seventh path 31, The first fluid flows through the eighth path 32.
The condition for opening the second path 18 is when the battery temperature is lower than the reference temperature and the second temperature of the first fluid is equal to or higher than a predetermined temperature. At this time, the bypass 20 is not opened.
The condition for opening the bypass circuit 20 is when the battery temperature is equal to or higher than the reference temperature, and there is no need to heat the battery 2, so the battery 1 is bypassed and the first fluid is passed. At this time, the second path 18 is not opened.
The conditions for opening the seventh path 31 and the eighth path 32 are when there is a heating use request and the temperature of the first fluid is equal to or higher than the first predetermined temperature. This 1st predetermined temperature is the temperature of the 1st fluid which can obtain the warm air of the desired temperature from the air conditioner 6, and changes with the temperature of the warm air which the air conditioner 6 desires.

Next, the second flow path 9 will be specifically described.
The second fluid flows in the third path 23, the fourth path 24, the fifth path 27, and the sixth path 29. The second fluid flows through the fifth path 27 and the sixth path 29 by the operation of the second pump 22, and the second control flows into the third path 23 and the fourth path 24. The second fluid flows by opening the valve 26. The second control valve 26 is a second flow rate control valve that can adjust the flow rate of the second fluid flowing through the third path 23.
The second heater 21 has the same heating performance as the first heater 16.
A fifth path 27 branches from the third path 23 via a second control valve 26.
The 5th path | route 27 and the 6th path | route 29 are via the battery 2 on the path | route, and can circulate the 2nd fluid from the 3rd path | route 23 to the battery 2. FIG.
When the second pump 22 operates, the second fluid in the third path 23 flows, and the second fluid circulates between the heater core 11 and the second heater 21. By passing the second fluid through the heater core 11, the second fluid dissipates heat in the heater core 11, and hot air can be blown into the vehicle interior. Furthermore, when the second control valve 26 is opened, the second fluid flows through the fifth path 27 and the second fluid also flows through the battery 2.
The second temperature sensor 25 is provided to determine whether the air conditioner 6 can be operated. From the detection result of the second temperature sensor 25, the control means 33 determines whether the air conditioner 6 can be operated and operates the air conditioner 6.
The total length of the third path 23 / fourth path 24 and the fifth path 27 / sixth path 29 through which the second fluid flows is the first path 13 / second path through which the first fluid flows. The total length of 18 is set shorter than the total length of the first path 13 and detour 20. That is, the amount of water of the second fluid is less than the amount of water of the first fluid. Furthermore, as described above, since the second fluid is a fluid having a heating rate faster than that of the first fluid, the second fluid can be heated to the specified temperature faster than the first fluid.
The heater core 11 and the battery 2 are separately provided with water passages through which the first fluid and the second fluid can pass. For this reason, even if the 1st fluid and the 2nd fluid pass together through heak core 11 or battery 2, the 1st fluid and the 2nd fluid do not mix.

Next, the warm-up control in this embodiment will be described based on the flowcharts of FIGS.
First, as shown in FIG. 3, when the program is started in the control means 33 (step A01), it is determined whether or not the ignition switch 34 is on (step A02). If this step A02 is NO, Continue judgment.
If this step A02 is YES, it is determined whether or not the battery temperature is equal to or higher than the reference temperature (step A03). If this step A03 is YES, it is determined whether or not the air conditioner (heating) 6 is used. If this step A04 is YES, it is determined whether or not the temperature of the first fluid by the first temperature sensor 16 is equal to or higher than the first predetermined temperature (step A05). If this step A05 is YES, there is no need to heat the first fluid by the first heater 16, and there is no need to heat the second fluid by the second heater 21, so the first heater 16 Then, the second heater 21 is turned off, the temperature of the first fluid is heated to the first predetermined temperature, and the bypass 20 and the seventh path 31 are opened (step A06).
In this step A06, the operation request detection unit 12 detects the operation request of the air conditioner 6, operates the air conditioner 6, and heating is in use (the air conditioner 6 is in operation). The valve 30 is opened, the seventh path 31 is opened, and the first fluid flows through the heater core 11.
On the other hand, since the temperature of the battery 2 is equal to or higher than the reference temperature, it is not necessary to heat the battery 2. For this reason, the first fluid is passed through the bypass 20 to prevent the battery 2 from being overheated.
When step A04 is NO, both the first heater 16 and the second heater 21 are turned off (non-actuated) (step A07).
In Step A07, since the air conditioner 6 is not operating, there is no decrease in the temperature of the first fluid by the heater core 11. In addition, since the temperature of the battery 2 is equal to or higher than the reference temperature and the battery 2 does not need to be heated, the first heater 16 and the second heater 21 are both deactivated, and the first fluid is routed through the bypass 20. The battery 2 is prevented from overheating.

If step A05 is NO, it is determined whether or not it is more efficient to operate the first heater 16 (step A08). This is a process provided to reduce the power consumption of the battery 2. For example, when the temperature of the first fluid is slightly lower than the first predetermined temperature, the power consumption of the battery 2 may be suppressed by heating the first fluid rather than heating the second fluid.
If step A08 is YES, the first heater 16 is turned on (actuated) and the second heater 21 is turned off (not actuated) (step A09).
In step A09, while there is an operation request for the air conditioner 6, the temperature of the first fluid is lower than the first predetermined temperature. Therefore, in order to prevent the battery 2 from being overcooled, Do not allow fluids to pass. That is, the second path 18 is not opened. In this case, the first heater 16 is operated to heat the first fluid to the first predetermined temperature and to flow through the bypass 20 and the seventh path 31.
When step A08 is NO, the first heater 16 is turned off and the second heater 21 is turned on (step A10).
In step A10, while there is an operation request for the air conditioner 6, the battery 2 is higher than the reference temperature and the first fluid is lower than the first predetermined temperature, so that overcooling of the battery 2 is prevented. In addition, the first fluid is not allowed to pass through the battery 2. That is, the second path 18 is not opened. Instead, the second fluid is circulated while operating the second heater 21 and the second pump 22 to heat the second fluid in the third path 23 and the fourth path 24 to the first predetermined temperature. In this case, the third route 23 and the fourth route 24 are opened, and the fifth route 27, the sixth route 29, and the detour route 20 are also opened.
As a result, the second fluid having a heating rate faster than that of the first fluid is heated by the second heater 21 and passed through the heater core 11 so that the air conditioner 6 can be used early and the second fluid can be heated. Since the warm time can be shortened, the power consumption of the battery 2 can also be reduced.
Then, after each processing of Step A06, Step A07, Step A09, or Step A10, the processing ends (Step A11). In step A11, when the battery temperature becomes equal to or lower than the estimated value, the process is performed again from the determination of the battery temperature.

On the other hand, if step A03 in FIG. 3 is NO, it is determined whether or not the air conditioner (heating) 6 is used (step A12). If this step A12 is YES, the process proceeds to the flowchart in FIG. To do.
As shown in FIG. 4, after determining YES in Step A12, it is determined whether or not the first predetermined temperature is higher than the second predetermined temperature (Step A13). Said 2nd predetermined temperature is the temperature of the 1st fluid which can heat the battery 2 more than a reference value.
If this step A13 is YES, it is determined whether or not it is more efficient to operate the second heater 21 (step A14).
This step A14 is provided in order to suppress the power consumption of the battery 2. That is, it is possible to determine which one of the first heater 16 and the second heater 21 is operated can reduce the required operation time of each heater, and it is possible to avoid wasting the power of the battery 2.
When step A14 is YES, the first heater 16 is turned on and the second heater 21 is turned off, the second path 18 and the seventh path 31 are opened, and the temperature of the first fluid is set to a second predetermined value. The temperature is increased to the temperature, the second path 18 and the seventh path 31 are opened, and the amount of the first fluid flowing through the seventh path 31 is increased from that of the second path 18 (step A15). 3), the process returns to step A03 in FIG.
In this step A15, when the battery 2 is lower than the reference temperature, the air conditioner 6 is in the operating state, and the temperature of the first fluid is equal to or higher than the second predetermined temperature, the second path 18, the seventh The path 31 is opened and the first heater 16 is operated. At the same time, the amount of the first fluid flowing in the seventh path 31 is increased as compared with the second path 18.
When step A14 is NO, the first heater 16 is turned off, the second heater 21 is turned on, the second pump 22 is operated, and the third path 23, the fourth path 24, and the fifth path 27 are turned on. -The sixth path 29 and the bypass 20 are opened, the second fluid is heated to the second predetermined temperature, and at the same time, the amount of the second fluid flowing in the third path 23 is increased from that of the fifth path 27. (Step A16), and the process returns to step A03.
In step A16, there is a request for operation of the air conditioner 6, while the temperature of the battery 2 is lower than the reference temperature, and the third path 23, fourth path 24, fifth path 27, The sixth path 29 is opened, the second heater 21 is activated to heat the second fluid to the second predetermined temperature, and the second fluid circulates through the heater core 11, the second heater 21, and the battery 2. At the same time, the amount of the second fluid flowing in the third path 23 is increased as compared with the fifth path 27.
In the step A15 and the step A16, the flow rates of the first fluid and the second fluid using the third control valve 30 as the first flow rate control valve and the second control valve 26 as the second flow rate control valve. Is configured to adjust. In this case, the first fluid or the second fluid is heated to the second predetermined temperature, and a large amount of the first fluid or the second fluid is allowed to flow to the heater core 11 to obtain a desired blowing temperature of the air conditioner 6.

If step A13 is NO, it is determined whether or not it is more efficient to operate the first heater 16 (step A17).
When this step A17 is YES, the first heater 16 is turned on and the second heater 21 is turned off, the second path 18 and the seventh path 31 are opened, and the first fluid is brought to the second predetermined temperature. Heating is performed (step A18), and the process returns to step A03 in FIG.
When step A17 is NO, the first heater 16 is turned off, the second heater 21 is turned on, the second pump 22 is operated, and the third path 23, the fourth path 24, and the fifth path 27 are turned on. The sixth path 29 and the bypass circuit 20 are opened, the second fluid is heated to the second predetermined temperature (Step A19), and the process returns to Step A03 in FIG.

On the other hand, when step A12 in FIG. 3 is NO, the process proceeds to the flowchart in FIG.
As shown in FIG. 5, after determining NO in step A12, it is determined whether or not the temperature of the first fluid by the first temperature sensor 15 is equal to or higher than a second predetermined temperature (step A20).
If step A20 is YES, both the first heater 16 and the second heater 21 are turned off, the second path 18 is opened (step A21), and the process returns to step A03 in FIG.
In step A21, the battery 2 is below the reference temperature, the air conditioner 6 is not activated, and the first fluid is above the second predetermined temperature. Therefore, the first heater 16 and the second heater 21 are not activated. . The first fluid flows in the second path 18 and warms the battery 2.
When step A20 is NO, it is determined whether or not it is more efficient to operate the first heater 16 (step A22).
If this step A22 is YES, the first heater 16 is turned on and the second heater 21 is turned off (step A23). In this step A23, the first heater 16 is turned on and the second heater 21 is turned off, the second passage 18 is opened, the first fluid is heated to the second predetermined temperature, and this heated first Fluid is passed through the second path 18.
When step A22 is NO, the first heater 16 is turned off, the second heater 21 is turned on, and the second pump 22 is operated (step A24). The first heater 16 is turned off and the second heater 21 is turned on, and the third route 23, the fourth route 24, the fifth route 27, the sixth route 29, and the detour route 20 are opened. Return to Step A03.
In this step A24, the battery 2 is below the reference temperature, there is no request for operation of the air conditioner 6, and the first fluid is below the second predetermined temperature, and the battery 2 needs to be heated. Since the first fluid is lower than the second predetermined temperature, the battery 2 cannot be heated using the first fluid. Therefore, the second heater 21 is operated to warm the second fluid. Then, the battery 2 is heated using the heated second fluid.

Although the embodiments of the present invention have been described above, the configuration of the above-described embodiments will be described for each claim.
In the first aspect of the invention, the temperature of the battery 2 is lower than the reference temperature and the first fluid cannot be used to heat the battery 2 above the reference temperature, or an operation request for the air conditioner 6 is detected and the desired temperature is detected. When at least one of the cases where it is determined that hot air of temperature is not obtained is established, either the first heater 16 or the second heater 21 with a short required operation time is operated to operate the first fluid or The second fluid is heated, and the heated first fluid or second fluid is supplied to the battery 2 or the air conditioner 6.
In such a structure, two fluids (first fluid and second fluid) having different temperature rising rates are provided, and the battery 2 and the air conditioner 6 have flow paths (first flow paths 8) through which the two fluids can respectively pass. Since the second flow path 9) is provided, the battery 2 and the air conditioner 6 can be heated using either the first fluid or the second fluid.
Further, by providing the first flow path 8 with the motor 3, the first fluid can be heated using the heat generated by the motor 3 that is driven when the vehicle travels, and the waste heat of the motor 3 is used. Thus, the battery 2 can be heated.
Further, when the temperature of the battery 2 is heated to a reference temperature or higher, the required operating time of the first heater 16 or the second heater 21 when the battery 2 cannot be heated even if the first fluid and the second fluid are used. By heating the first fluid or the second fluid using the shorter heater, the battery 2 can be heated to a reference temperature or higher at an early stage, and the power consumption of the battery 2 can be suppressed.

In the invention according to claim 2, the first predetermined temperature which is the temperature of the first fluid or the second fluid for obtaining the warm air at the desired temperature of the air conditioner 6 and the battery 2 is heated to a reference temperature or higher. The second predetermined temperature, which is the temperature of the first fluid or the second fluid that is possible, is set, and when the temperature of the battery 2 is lower than the reference temperature and the operation request for the air conditioner 6 is detected, When the first predetermined temperature is determined to be greater than the second predetermined temperature, the first heater 16 or the second heater 21 is operated for either one of the first heater 16 or the second heater 21 with a shorter required operating time. While heating the fluid or the second fluid to the second predetermined temperature, the amount of the heated first fluid or second fluid supplied to the air conditioner 6 is increased.
As a result, the battery 2 can be heated to the optimum operating temperature, and air at a desired temperature can be obtained.

  In the present invention, when the temperature of the battery is high, the battery is cooled by passing the first fluid cooled by the radiator through the battery by adding another path connected to the battery between the radiator and the inverter. It is also possible.

  The warm-up device according to the present invention can be applied to various electric vehicles.

DESCRIPTION OF SYMBOLS 1 Warm-up device 2 Battery 3 Motor 4 Inverter 5 Radiator 6 Air conditioner 7 Battery temperature sensor 8 First flow path 9 Second flow path 10 Closed circuit 11 Heater core 12 Operation request detection part 13 First path 14 First pump 15 First Temperature sensor 16 First heater 17 First control valve 18 Second path 20 Bypass 21 Second heater 22 Second pump 23 Third path 24 Fourth path 25 Second temperature sensor 26 Second control valve ( Second flow control valve)
27 Fifth path 29 Sixth path 30 Third control valve (first flow regulating valve)
31 7th path 32 8th path 33 Control means 34 Ignition switch 35 Outside air temperature sensor

Claims (2)

  A battery temperature sensor for detecting the temperature of the battery in a warming-up device for an electric vehicle that is driven by electric power and includes a battery that is a power source of the electric vehicle and a motor that is operated by the electric power of the battery to drive the vehicle. A first flow path through which the first fluid flows and a second flow path through which the second fluid having a higher temperature rising speed than the first fluid flows, and the battery includes the first flow path and the second flow path. The first fluid and the second fluid exchange heat, the first flow path detects the temperature of the motor, a first pump for pumping the first fluid, and a temperature of the first fluid. A first heater that heats the first fluid using electric power of the battery and a bypass circuit that bypasses the battery and flows the first fluid; Second pump for pumping two fluids And a second temperature sensor for detecting the temperature of the second fluid, and a second heater for heating the second fluid using electric power of the battery, and air-conditioning that blows warm air into the vehicle interior of the vehicle The air conditioner has a structure through which the first fluid and the second fluid pass, and includes an operation request detection unit that detects whether there is an operation request to the air conditioner, and the temperature of the battery is a reference. When the temperature is less than the temperature and the battery cannot be heated above the reference temperature using the first fluid, or when it is determined that the operation request for the air conditioner is detected and hot air at a desired temperature cannot be obtained. When at least one of the conditions is established, the first fluid or the second fluid is heated by operating either one of the first heater or the second heater that has a short required operation time, and this heating is performed. First fluid The warming-up device for an electric vehicle, characterized in that a control means for supplying a second fluid to the battery or the air conditioner.   A flow rate adjusting structure for adjusting a flow rate of each of the first fluid and the second fluid supplied to the battery and the air conditioner, wherein the control means obtains hot air at a desired temperature of the air conditioner; A first predetermined temperature that is a temperature of the first fluid or the second fluid and a second predetermined temperature that is a temperature of the first fluid or the second fluid capable of heating the battery to a reference temperature or higher are set. When the temperature of the battery is lower than the reference temperature and an operation request for the air conditioner is detected, the first predetermined temperature and the second predetermined temperature are compared, and the first predetermined temperature is compared. When it is determined that the first heater is larger, the first heater or the second heater is operated for a short time so that the first fluid or the second fluid is heated to the second predetermined temperature. Then Moni, warming-up apparatus for an electric vehicle according to claim 1, characterized in that increasing the amount and supplies the warmed first fluid or the second fluid to the air conditioner.

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