JP3050051B2 - Air conditioner for electric vehicle and electric vehicle equipped with the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for an electric vehicle and an electric vehicle equipped with the same, and more particularly, to the use of conditioned air from a vehicle interior air conditioner for temperature control of a battery. The present invention relates to an air conditioner and an electric vehicle having a fail-safe function when a part of the air conditioner fails.

[0002]

2. Description of the Related Art It is known that a battery mounted on an electric vehicle has a narrow optimum temperature range for use and a decrease in electrolyte temperature leads to a decrease in battery capacity. But, conversely,
For example, when the temperature is raised to 50 ° C. or higher (for a lead-acid battery), the material deteriorates and the capacity decreases. Therefore, it is necessary to always control the battery temperature within a predetermined temperature range.

[0003] Since the temperature drop of the battery is remarkable in winter and in a cold region, for example, it is disclosed in Japanese Utility Model Application Publication No.
No. 4033 (hereinafter referred to as "Prior art 1"), JP-A-5-24
As shown in No. 4749 (hereinafter referred to as Prior Example 2), a configuration for heating a battery has been developed.

[0004]

In the above-mentioned prior art, there is a configuration in which the battery is heated by utilizing the heat generated by the motor for driving the electric vehicle. Therefore, the battery temperature is set to a predetermined value regardless of whether it is winter or summer. It cannot be controlled within the temperature range.

Therefore, it is conceivable to adopt a configuration in which a dedicated blower, a heater, a duct, and the like are provided to control the temperature of the battery to control the temperature of the battery. However, this configuration is separate from an indoor air conditioner. Since the air conditioner for the battery is provided, the number of parts increases, the weight increases, and the manufacturing cost increases.

[0006] Further, since the hydrogen gas generated in the battery may fill the battery frame accommodating the battery or flow into the vehicle interior, it is necessary to quickly discharge the generated hydrogen gas from the battery frame.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an air conditioner for an electric vehicle according to the present invention comprises a blower and an air sucked into the blower. An intake door that can be switched between outside air and inside air, a cooling unit that can cool air blown by the blower, and a connection to this cooling unit
Main cooler that cools the hot gas from the compressed compressor
A battery, a sub-condenser capable of heating the air passing through the cooling unit, an indoor duct for guiding the air passing through the sub-condenser into the room, and a battery frame containing a battery inside the air passing through the sub-condenser. A battery duct branched from the indoor duct so as to guide the air to the indoor duct, and a battery capable of switching air to the indoor duct side or the battery duct side and adjusting the switching opening degree at a branch position between the indoor duct and the battery duct. A door, and an air-conditioner control unit capable of controlling the rotation of the blower, the switching opening degree of the intake door and the battery door, and the necessity of heating of air passing through the cooling unit, and a high-temperature gas from the compressor. The main control
Switchable to a capacitor or the sub-capacitor.
It is.

[0008] The air conditioner control unit is configured to store a rotation number determination chart for defining the rotation number of the blower based on the relationship between the difference between the set temperature and the detected vehicle interior temperature and the temperature in the battery frame. It has.

Further, the air-conditioner control unit determines the opening degree of the battery door based on the relationship between the difference between the set temperature and the detected vehicle interior temperature and the temperature in the battery frame. Is provided.

[0010] An electric vehicle according to the present invention is a blower failure determination means for determining a failure of a blower in an air conditioner, an intake door failure determination means for determining a failure of an intake door in the air conditioner. Battery door failure determination means for determining failure of a battery door; door failure determination means for determining failure of various doors of a vent door, a foot door and a differential door in an air conditioner; and an electric vehicle based on the determination of the various failure determination means. Traveling mode setting means for setting the traveling mode to a desired traveling mode set in advance.

The traveling mode setting means normally operates when the judgment by the blower failure judgment means is normal, the judgment by the battery door failure judgment means is normal, and the judgment by the door failure judgment means is normal. If only the determination of the door failure determination means is a failure, the battery door is kept fully open, the intake door is kept on the outside air introduction side, and the blower is rotated. It is provided with a function of setting the temporary running mode 2.

The traveling mode setting means determines whether or not the battery door is in the fully closed position when the determination by the blower failure determination means is normal and the determination by the battery door failure determination means is failure. When the vehicle is in the fully closed position, the vehicle is allowed to travel for a predetermined time after the occurrence of a failure, and is set in a travel prohibition mode 2 in which the high-power circuit is cut off after the vehicle stops. Is fully closed, the intake door is held on the outside air introduction side, and a function is provided for setting the provisional traveling mode 1 in a state where the blower is rotated.

Further, the traveling mode setting means determines whether or not the battery door is defective when the determination by the blower failure determining means is a failure and the determination by the intake door failure determining means is a failure. If it is not a failure, the vehicle is allowed to run for a predetermined time after the occurrence of the failure, and is set in a travel prohibition mode 2 in which the high-power circuit is cut off after the travel is stopped. It is provided with a function of setting the traveling prohibition mode 1 for cutting.

Further, the traveling mode setting means determines whether or not the battery door is defective when the determination by the blower failure determining means is a failure and the determination by the intake door failure determining means is normal. In the case of a failure, it is determined whether or not the battery door is in a fully-closed position. 2 if not in the fully closed position, the driver is advised to stop and set to the driving prohibition mode 1 in which the high-power circuit is cut off after stopping the driving. In the case of, the doors on the vehicle cabin side are fully closed, the battery door is fully closed when the vehicle is stopped, and the battery door is fully opened when the vehicle is traveling. If the battery door is not malfunctioning and the judgment of the door failure judgment means is normal, it is determined whether or not the battery door is stopped.If it is stopped, the battery door is fully closed. It is provided with a function to set a temporary running mode 4 in which the door is fully opened.

[0015]

With the above arrangement, in the air conditioner according to the present invention, the air conditioner is connected to the compressor connected to the cooling unit.
High temperature gas to main compressor or condenser
When the blower is driven, the outside air or the air in the passenger compartment or the mixed air is sucked from the intake door,
Cooled in the cooling unit. After passing through the sub-condenser unit, the battery door is switched to the indoor duct or the battery duct by switching, or is distributed in an appropriate amount.

At this time, the rotation speed of the blower, the switching opening degree of the intake door and the battery door, and the necessity of heating the air by the sub-condenser are controlled by the air conditioner control unit.

Therefore, the air conditioning in the vehicle compartment and the air conditioning in the battery frame containing the battery can be performed by using a common air conditioner. Therefore, the configuration of the air conditioner can be simplified, and the overall weight can be reduced.

Further, the battery can be cooled and heated, the battery can be maintained in a predetermined temperature range, and the life of the battery can be extended.

Further, in the air conditioner according to the present invention,
The air conditioner control unit defines a storage unit of a rotation number determination chart that specifies the rotation number of the blower and a switching opening degree of the battery door based on a relationship between a difference between the set temperature and the vehicle interior temperature and a temperature in the battery frame. Because it has a storage unit for the battery door opening degree determination chart,
It detects the temperature in the vehicle compartment, calculates the difference from the set temperature, and searches the rotation speed of the blower and the switching opening of the battery door quickly by comparing the difference with the detected temperature in the battery frame. The responsiveness is good in response to changes in vehicle interior temperature and changes in battery frame temperature.

In the electric vehicle according to the present invention having the above-described configuration, the traveling mode setting means is provided on the basis of the judgments of the blower failure judgment means, the intake door failure judgment means, the battery door failure judgment means, and the door failure judgment means. Since the desired travel mode set in advance in the travel mode is set, the vehicle can travel in a safe travel mode in response to various failures.

In the electric vehicle according to the present invention,
The traveling mode setting means sets the normal traveling mode when the blower, the battery door and the various doors are normal, and holds the intake door on the outside air introduction side when only the various doors are out of order. In addition, since the battery door is fully opened and has a function of setting the provisional traveling mode 2 in a state where the blower is rotated, in this case, the outside air is blown to the battery frame side by the blower. In this state, the hydrogen gas generated from the battery does not enter the passenger compartment and is appropriately discharged to the outside.

Further, in the electric vehicle according to the present invention, when the blower is normal and the battery door is malfunctioning, the traveling mode setting means determines whether or not the battery door is in the fully closed position, and When the vehicle is in the closed position, the vehicle is allowed to travel for a predetermined time after the occurrence of a failure, and is set in a travel prohibition mode 2 in which the high-power circuit is cut off after the vehicle stops. The function of setting the intake door on the outside air introduction side and setting the temporary running mode 1 in a state where the blower is rotated is provided.

Therefore, in the travel-prohibited mode 2, the electric vehicle has room to move to a safe place, and the high-power circuit is cut off after the travel is stopped in the safe place. Driving is stopped before filling the frame.

Further, in the temporary running mode 1, since each door in the room is fully closed, outside air is introduced and blown by the blower, the air from the blower does not flow into the room and the battery frame does not flow into the room. As a result, the hydrogen gas generated from the battery is discharged from the battery frame, so that the hydrogen gas does not accumulate in the battery frame.

In the electric vehicle according to the present invention,
The running mode setting means determines whether the battery door is faulty if the blower is faulty or the intake door is faulty. If not, the running mode setting means sets the above-mentioned running prohibition mode 2 to the faulty mode. In the case of, the vehicle has a function of recommending a stop to the driver and setting a traveling prohibition mode 1 in which the high-power circuit is cut off after the traveling is stopped.

Therefore, in the travel prohibition mode 2, vehicle travel is secured as described above.

In the traveling prohibition mode 1, it is recommended that the vehicle be stopped immediately, and the high-power circuit is cut off after the vehicle is stopped. Therefore, the vehicle can be moved to a safe place such as a parking area or a roadside zone.

Still further, in the electric vehicle according to the present invention, when the blower has failed and the intake door is normal, the traveling mode setting means determines whether or not the battery door has failed and determines that the battery door has failed. In this case, it is determined whether or not the vehicle is in the fully closed position. If the vehicle is fully closed, the driving prohibition mode 2 is set. If the vehicle is not fully closed, the driving prohibition mode 1 is set. If the door is not faulty and the door on the indoor side is faulty, fully close each door on the indoor side, if driving is stopped, fully close the battery door, and if driving, open it fully. If the battery door is normal and the door on the indoor side is normal and stopped, the battery door is fully closed, and if the vehicle is running, the battery door is fully opened. Provisional It is used to set the line mode 4.

Therefore, in the travel prohibition modes 1 and 2, the vehicle travel is secured as described above.

In the temporary running mode 3, the doors on the indoor side are in the fully closed state, and the battery door is kept fully closed while the vehicle is stopped, so that hydrogen gas generated from the battery is supplied from the battery frame side to the indoors. Backflow is prevented, and the battery door is fully opened during traveling, and the traveling wind is introduced into the battery frame to discharge hydrogen gas in the battery frame, so that hydrogen accumulates in the battery frame. There is no.

Further, in the driving mode 4, the battery door is fully closed while the vehicle is stopped, and the battery door is fully opened while the vehicle is traveling. Therefore, it is possible to prevent the backflow of hydrogen gas from the battery frame into the room when the vehicle is stopped. Also, during traveling, the hydrogen gas in the battery frame can be discharged using the traveling wind, and the hydrogen gas does not accumulate in the battery frame.

[0032]

Referring to FIG. 1, an electric vehicle 1 according to this embodiment has a battery frame 5 in which a battery 3 is mounted.
Air conditioning in the passenger compartment and the battery 3
An air conditioner 7 for controlling the temperature of the battery frame 5 to manage and control the temperature of the battery frame 5 is provided.

The air conditioner 7 generally includes an air box 9 and a blower fan 11 as an example of a blower, and further includes a cooling unit 13 capable of cooling air blown by the blower fan 11. Further, a sub-condenser 15 capable of heating the air passing through the cooling unit 13 is provided.

The air conditioner 7 further includes an indoor duct 1 for guiding the air passing through the sub-condenser 15 into the vehicle interior.
7 and a battery duct 19 branched from the indoor duct 17 to guide air to the battery frame 5.
A battery door 21 is provided at a branch position with respect to 9 so that air passing through the sub-condenser 15 can be switched to the indoor duct 17 or to the battery duct 19 and the switching opening can be adjusted. The battery frame 5
Is connected to a discharge duct 23.

With the above configuration, in this embodiment, after the air blown by the blower fan 11 is cooled by the cooling unit 13 and the air is heated by the sub-condenser 15 if necessary,
By switching 1 or adjusting the switching opening, air can be introduced individually or simultaneously into the vehicle compartment or into the battery frame 5.

That is, according to this embodiment, air conditioning in the vehicle interior and the battery frame 5 can be performed using the common air conditioner 7. Therefore, compared with the case where the air conditioner for the vehicle compartment and the air conditioner for the battery frame 5 are separately provided, the overall configuration of the air conditioner can be simplified, and the number of components can be reduced. The overall weight can be reduced.

Also, the air introduced into the battery frame 5 can be cooled and heated, and the battery 3 can always be kept in a predetermined temperature range regardless of the season, and the life of the battery 3 is extended. Is what you can do.

Referring to FIGS. 2 and 3, an inlet temperature sensor 25 is provided at the inlet of the battery frame 5, and an outlet temperature sensor 27 is provided at the outlet. Further, inside the battery frame 5, an in-frame temperature sensor 29 is provided, and these temperature sensors 25, 27, 2
9 is an air conditioner controller 3 for controlling the air conditioner 7
Connected to 1.

The air box 9 is provided with an intake door 33 which is capable of switching the air taken into the blower fan 11 between outside air and vehicle interior air, and an opening / closing operation of the intake door 33. An intake door position sensor 37 for detecting the positions of the actuator 35 and the intake door 33 is provided.

The motor 39 of the blower fan 11 as the blower is provided with a blower fan rotation sensor 41 for detecting the rotation of the blower fan 11.

[0041] The in cooling unit 13 Yes connect the low pressure side of the complexity <br/> Tsu support 43, the compressor 4
3 is provided with a compressor rotation sensor 45.

The high pressure side of the compressor 43 is a three-way valve 4
7 is connected to the inlet side of the main condenser 49, and the outlet side of the main condenser 49 is connected to the sub-condenser 15 via a check valve 51.

The sub-condenser 15 is disposed immediately before the battery door 21. The outlet of the sub-condenser 15 is connected to the cooling unit 13 via a liquid tank 53.

Therefore, by switching the three-way valve 47, it is possible to switch between the case where the high-temperature and high-pressure gas from the compressor 43 is cooled in the main condenser 49 and the case where the sub-condenser 15 is cooled. The heated air can be heated by the sub-condenser 15 if necessary. The compressor 43 is a main condenser.
Is commonly used for the capacitor 49 and the sub-capacitor 15.
Thus, the configuration can be simplified.

Immediately before the sub capacitor 15,
An air mix door 55 is provided. Further, an air mix door actuator 57 for adjusting the opening degree of the air mix door 55 is provided, and an air mix door position sensor 59 for detecting the position of the air mix door 55 is provided.

The battery door 21 is provided with a battery door actuator 61 for switching, and further provided with a battery door position sensor 63 for detecting the opening position of the battery door 21.

The indoor duct 17 has a vent door 6
5, a foot door 67 and a differential door 69 are respectively mounted so as to be openable and closable, and each door has an actuator 7 for opening and closing.
1, 73, 75 and position sensors 77, 79, 81 are provided.

The various actuators and sensors are appropriately connected to the air conditioner control unit 31. Further, an indoor temperature sensor 83, a solar radiation sensor 85, and an outside air temperature sensor 87 are connected to the air conditioner control unit 31, and a manual setting switch 89,
The main contactor 91 and the speed sensor 93 of the high-power circuit are connected to each other.

Next, a procedure for setting the running mode of the electric vehicle 1 in accordance with the failure state of the air conditioner 7 in the above configuration will be described with reference to the flowcharts of FIG.

First, in step S1, IGN ON
Start as Next, in step S2, the control unit performs a self-diagnosis to verify normal operation.

In step S3, the result of the self-diagnosis is determined, and if the result is NG, the flow shifts to the traveling prohibition mode 1 in step S4 to prohibit traveling. If the self-diagnosis result is OK, the past failure history is confirmed in step S5,
If the result of determination in step S6 is that there is a problem, the process proceeds to step S7, where the warning lamp blinks.

Thereafter, in step S8, a rotation instruction (Nc3) of the blower fan 11 as a blower is issued,
After the elapse of the timer set time in step S9, step S10
At the blower fan rotation speed (N
i3) is detected and input, and in step S11, it is determined whether the absolute value of the difference between the specified rotation speed Nc3 and the detected rotation speed Ni3 is larger or smaller than the allowable rotation difference Nr3.

If the above judgment is small, step S1
In step S13, the failure flag Gn1 is set to "0".

If the determination in step S11 is large, it is determined in step S14 that the blower fan has failed, and the failure flags Gn1 and Gn are determined in step S15.
Each of p1 is set to "1", and the warning light is blinked in step S16.

In steps S8 to S16, the self-diagnosis of the blower fan failure is completed, and then the self-diagnosis of the intake door failure is performed.

At step S17, intake door 3
An operation instruction (Pic1) is issued to move the position No. 3 to the outside air introduction position. After an arbitrarily set time in step S18, the position (Pii1) of the intake door 33 is detected and input by the position sensor 37 in step S19.

Then, in step S20, it is determined whether or not the intake door 33 has operated at the position where the operation has been instructed. If it has operated, it is determined in step S21 that the intake door 33 is normal, and in step S22, the failure flag Gn2 is determined. To “0”.

If NO in step S20, it is determined in step S23 that the intake door has a failure, and in step S24, failure flag Gn2,
Gp2 is set to “1”, and the warning lamp blinks in step S25.

In steps S17 to S25, the self-diagnosis of the failure of the intake door is completed, and then the self-diagnosis of the failure of the battery door is performed.

In step S26, the battery door 2
1 to the open position (the position where the battery frame 5 side is opened and the indoor duct 17 side is closed).
c1) is performed, and after an arbitrarily set time has elapsed in step S27, the position sensor 63 detects and inputs the position Pbi1 of the battery door 21 in step S28.

Then, in a step S29, it is determined whether or not the battery door 21 has moved to the instructed open position. If this determination is YES, step S30
In step S32, an operation instruction is issued to move to the door closed position (Pbc5), and after an arbitrary set time in step S31, the position sensor 63 detects and inputs the position Pbi5 of the battery door 21 in step S32.

Then, in step S33, it is determined whether or not the battery door 21 has moved to the instructed closing position. Determined that when this determination is YES normal in Step S 3 4, the fault flag Gn3 to "0" in step S35.

If the determinations in steps S29 and S33 are NO, it is determined in step S36 that the battery door 21 has failed, and the failure flags Gn3 and Gp3 are set to "1" in step S37.
Then, the warning lamp blinks in step S38.

In steps S26 to S38, the self-diagnosis of the failure of the battery door 21 is completed, and then the self-diagnosis of the failure of the vent door is performed.

In step S39, an operation instruction is issued to move the vent door 65 to the closed position (Pvc2). After an arbitrary set time in step S40, the position sensor 77 detects the position Pv of the vent door 65 in step S41.
Detect and input i2.

Then, in step S42, it is determined whether or not the vent door 65 has moved to the instructed closing position.
If it is ES, it is determined in step S43 that it is normal, and the failure flag Gn4 is determined in step S44.
To “0”.

If the determination in step S42 is NO
In step S45, the vent door 6
5 is determined to be faulty, the fault flags Gn4 and Gp4 are each set to "1" in step S46, and the warning lamp blinks in step S47.

In steps S39 to S47, the self-diagnosis of the failure of the vent door 65 is completed, and then the self-diagnosis of the failure of the foot door 67 is performed.

In step S48, an operation instruction is issued to move the foot door 67 to the closed position (Pfc2), and after an arbitrary set time in step S49, the position sensor 79 detects the position P of the foot door 67 in step S50.
fi2 is detected and input.

Then, in a step S51, it is determined whether or not the foot door 67 has moved to the instructed closing position.
If it is ES, it is determined in step S52 that it is normal, and the failure flag Gn5 is determined in step S53.
To “0”.

If the determination in step S51 is NO
In step S54, it is determined in step S54 that the foot door has a failure, the failure flags Gn5 and Gp5 are set to "1" in step S55, and the warning lamp blinks in step S56.

In steps S48 to S56, the self-diagnosis of the failure of the foot door 67 is completed.
9 performs self-diagnosis of failure.

In step S57, an operation instruction is issued to move the differential door 69 to the closed position (Pdc2), and after an arbitrary set time in step S58, the position sensor 81 detects the position Pdi of the differential door 69 in step S59.
2 is detected and input.

Then, in step S61, it is determined whether or not the differential door 69 has moved to the instructed closing position. If this determination is YES, it is determined in step S62 that it is normal, and in step S63, the failure flag Gn6 is determined. To “0”.

If the determination in step S61 is NO, it is determined in step S64 that the differential door 69 is out of order. In step S65, the failure flags Gn6 and Gp6 are set to "1".
At 6 the warning light flashes.

In steps S57 to S66, the self-diagnosis of the failure of the differential door 69 is terminated. Next, the current failure mode is determined based on the results of the various self-diagnosis, and a necessary traveling mode is set.

At step S67, a failure confirmation mode is set. First, at step S68, the failure flag G
The failure diagnosis of the blower fan 11 is performed according to n1, and if it is normal, the failure flag Gn is determined in step S69.
The failure diagnosis of the battery door 21 is performed on the basis of (3).

If the battery door 21 is normal, a failure diagnosis of the vent door 65, the foot door 67, and the differential door 69 is performed in step S70 based on the failure flag Gpi. If the determination in step S70 is normal, the normal driving mode in step S71 is set. If the determination in step S70 is a failure, step S70
72 is set to the temporary running mode 2.

If it is determined in step S69 that the battery door 21 is in the fully closed position (Pbr2), it is determined whether the battery door 21 is in the fully closed position (Pbr2). The process proceeds to S74 to set the traveling prohibition mode 2.

If it is determined in step S73 that the vehicle is not in the fully closed position, the process proceeds to step S75, where the temporary traveling mode 1 is set.
To

If the determination in step S68 is a failure, the flow shifts to step S76 to determine the failure of the intake door 33 based on the failure flag Gn2.

If the intake door 33 is normal, the flow shifts to step S77 to determine whether or not the battery door 21 has failed based on the failure flag Gn3. This step S
If the determination at 77 is normal, the process moves to step S78, and based on the failure flag Gpi, each of the doors 65, 67, 6
9 is determined.

If the determination in step S78 is normal, the flow shifts to step S79 to set the temporary traveling mode 4. If the determination is a failure, the process proceeds to step S80 to set the temporary traveling mode 3.

If the determination in step S76 is a failure, the process proceeds to step S81 to determine the failure of the battery door 21. If the determination in step S81 is normal, the flow shifts to step S82 to set the travel inhibition mode 2, and if the determination is a failure, the flow shifts to step S83 to shift to the travel inhibition mode 1.

If the determination in step S77 is a failure, the process shifts to step S84, where it is determined whether or not the battery door 21 is at the fully closed position.

If the battery door 21 is in the fully closed position in step S84, the flow shifts to step S82 to set the travel inhibition mode 2. If the position is not the fully closed position, the flow shifts to step S83 to set the traveling inhibition mode 1.

In the normal running mode in step S71, the operation is normal, so the flow shifts to various air conditioning setting determination modes in step S85, and the set temperature Tcm is manually input in step S86. Then, step S8
At 7, the detection value Tco of the outside air temperature sensor 87 is input,
In step S88, the detected value T of the room temperature sensor 83
Enter ci. Further, steps S89, S90, S9
1, the detected values Tbi, Tb of the sensors 25, 29, 27 provided at the entrance, inside, and exit of the battery frame 5, respectively.
b and Tbo are input.

Then, in step S93, it is determined whether or not the absolute value of the temperature difference between the inlet and the outlet of the battery frame 5 is 10 or less, and abnormal heat generation in the battery frame 5 is detected.

If the determination in step S93 is normal, the flow shifts to step S94, where the internal temperature of the battery frame 5 is calculated based on the sum of the inlet temperature and the outlet temperature.
It is determined whether or not the absolute value obtained by subtracting the double is 2 or less, and the temperature non-uniformity in the battery frame 5 is detected.

If the determination in step S94 is normal, the flow shifts to step S95 to set the flag Kb of the position correction coefficient to "0".

If the determination in steps S93 and S94 is abnormal, the process proceeds to step S96, where the flag Kb of the position correction coefficient is set to "1", and the battery door is increased so that the amount of air blown into the battery frame 5 is increased. The opening degree of 21 is corrected.

Next, the flow shifts to step S97, where the flow shifts to the judgment of switching between the main capacitor 49 and the sub capacitor 15. In step S98, the set temperature Tcm is compared with the outside air temperature Tco. If Tcm <Tco, the three-way valve 47 is switched so as to shift to step S99 for cooling using the main condenser 49, and Tcm> T
In the case of co, the three-way valve 47 is switched so as to shift to step S100 in which heating is performed using the sub-condenser 15.

Next, the flow shifts to step S101 to determine the rotation of the blower fan 11. In order to determine the rotation speed of the blower fan 11, the storage unit of the air conditioner control unit 31 stores the blower fan 11 based on the relationship between the difference between the set temperature and the vehicle interior temperature and the temperature in the battery frame. A blower fan speed determination chart that defines the speed is stored in advance (see FIG. 20A).
According to the blower fan rotation speed determination chart, the rotation speed of the blower fan 11 is determined in three stages: high speed, medium speed, and low speed.

In order to search the blower fan rotation speed determination chart, the set temperature T is set in step S102.
It is determined whether or not the absolute value of the difference between cm and the vehicle interior temperature Tci is 10 or less.
The process proceeds to 03, where it is further determined whether or not the absolute value is 5 or less.

In step S103, the absolute value is 5
If it is less than or equal to 2, it is further determined in step S104 whether or not it is 2 or less.
In step S105, it is determined whether the temperature Tbb in the battery frame 5 is in a range of 30 <Tbb <40,
If YES, the rotational speed is retrieved from the blower fan rotational speed determination chart in accordance with the above conditions, and step S
At 106, low speed rotation is determined.

If the determination in step S102 is 1
If it is 0 or more, high speed rotation is searched from the blower fan speed determination chart according to this condition, and in step S107, high speed rotation is determined.

If the determination in step S103 is 5 or more, the flow shifts to step S108 to determine whether or not the temperature Tbb in the battery frame 5 satisfies Tbb> 25. If YES, step S109 In this time, it is determined whether or not Tbb <45,
If YES, the medium speed rotation is retrieved from the blower fan speed determination chart, and the medium speed rotation is determined in step S110.

If the determinations in steps S108 and S109 are NO, the process proceeds to step S107, and high speed rotation is determined.

If the determination in steps S104 and S105 is NO, the process shifts to step S110 to determine the medium speed rotation.

In steps S97 to S100, the capacitors are switched, and in steps S101 to S100.
When the rotational speed of the blower fan 11 is determined at 110, the opening of the battery door 21 is determined next.

That is, in step S111, the opening of the battery door 21 is determined. In order to determine the opening degree of the battery door 21, the storage unit of the air conditioner control unit 31 stores the opening degree of the battery door based on the relationship between the difference between the set temperature and the vehicle interior temperature and the temperature inside the battery frame. Is determined in advance (see FIG. 20B).

In this battery door opening determination chart, nine levels from 0 to 8 are defined as opening reference values Pb.
Pb = 0 is a state in which the battery frame 5 side is closed (room side fully open), Pb = 8 is a state in which the room side is closed (battery frame side fully open), and Pb = 0 and Pb =
8 is divided into eight equal parts.

In order to search the battery door opening determination chart, it is determined in step S112 whether or not the battery frame temperature Tbb satisfies 30 <Tbb <40. If YES, the setting is made in step S113. The absolute value of the difference between the temperature and the cabin temperature is | Tci
It is determined whether −Tcm | <2, and if YES, the opening reference value Pb = 2 is retrieved from the opening determination chart in step S114, and if NO, the opening reference value Pb is opened in step S115. The degree reference value Pb = 1 is searched.

If NO in step S112, the flow shifts to step S116 to set the battery frame temperature Tbb to 25 <Tbb ≦ 30 or 40 ≦ Tbb <
It is determined whether or not the temperature is equal to 45. If the determination is YES, the process shifts to step S117 to determine whether or not the absolute value of the difference between the vehicle interior temperature and the set temperature is | Tci-Tcm | <2. Is determined, and if YES, the process proceeds to step S11.
At 8, an opening reference value Pb = 4 is retrieved.

If the determination in step S117 is NO, the process shifts to step S119, and it is determined whether or not the absolute value of the difference is | Tci-Tcm | <10, and if it is YES. In step S120, an opening reference value Pb = 3 is searched for, and if NO, an opening reference value Pb = 2 is searched for in step S121.

If the determination in step S116 is N
In the case of O, the process proceeds to step S122, and the temperature Tbb is set to 0 <Tbb ≦ 25 or 40 ≦ Tbb <45 this time.
Is determined, and if NO, the opening reference value Pb = 8 is searched in step S123.

If YES in step S122, | Tci-Tcm | is set in step S124.
<2 is determined, and if YES, step S
At 125, Pb = 6 is searched.

If the determination in step S124 is NO, the process moves to step S126, and this time | T
It is determined whether or not ci-Tcm | <5, and if YES, Pb = 5 is searched for in step S127.

The determination in step S126 is N
If it is O, in step S128, | Tci
It is determined whether −Tcm | <10, and if YES, Pb = 4 is searched for in step S129, and if NO, Pb = Pb in step S130.
= 3 is searched.

After the opening reference value Pb of the battery door 21 is determined in steps S111 to S130, in step S131, the above-described steps S95 and S95 are performed.
The opening degree correction (Pb + Kb) is performed using the battery door position correction coefficient Kb in S96, and the correction value Pba is set to Pb.
It is determined in step S132 whether or not a> 8, and in the case of YES, the correction value Pba = 8 is set in step S133. In the case of NO, the value as it is is set as the correction value Pba.

In step S134, the opening of the battery door 21 is positioned based on the correction value Pba.

As described above, when the vehicle is in the normal running state in which the opening degree of the battery door 21 is controlled to maintain the inside of the battery frame 5 in a predetermined temperature range, step S13 is executed.
In step S136, the control instruction value and each functional operation are constantly compared to determine whether or not the operation is abnormal.

If there is a problem in the determination in step S136, the flow shifts to the self-diagnosis mode in step S137,
The process returns to step S2. If there is no problem in the above determination, the flow shifts to step S138 to determine whether or not IGN is ON. If NO, the flow shifts to step S139 to stop the operation and end.

The determination in step S138 is YES.
In the case of, after the elapse of the arbitrarily set time in step S140, the process shifts to the various air conditioning setting determination modes in step S141, and returns to step S85 described above.

When the mode shifts from the above steps S4 and S83 to the driving prohibition mode 1, the process shifts from step S142 to step S143 to emit a warning light and recommend a stop to the driver. Then, it is determined in step S144 whether or not the vehicle is stopped.
In step S5, the main contactor of the high-power circuit is opened and disconnected, and in step S146, traveling is prohibited. Then, in step S147, a repair is performed on the failed part.

When the mode is shifted from the above steps S74 and S82 to the running prohibition mode 2, the process shifts from step S148 to step S149. In this step S149, the running is permitted for a predetermined time set in the timer. Move to

That is, when the mode is shifted to the travel prohibition modes 1 and 2, the travel is prohibited. Therefore, by continuing the travel, it is possible to prevent the occurrence of the trouble due to the stagnation of the hydrogen gas.

When the mode is shifted from the step S75 to the temporary running mode 1, the steps S150 to S15 are performed.
Then, the vent door 65, the foot door 67, and the differential door 69 are fully closed, and the process proceeds to step S152. Then, in step S152, the intake door 33 is set to the outside air introduction side, and in step S153, the blower fan 11 is constantly rotated to allow the vehicle to travel.
Repair the faulty part at.

When the mode is shifted from the above-mentioned step S72 to the provisional traveling mode 2, steps S155 to S15 are executed.
The process moves to step S6, the battery door 21 is fully opened, and the process moves to step S152.

In the temporary running modes 1 and 2, the positions of the doors 21, 33, 65, 67 and 69 and the operation of the blower fan 11 are regulated to prevent the inflow of hydrogen from the battery frame 5 into the room. At the same time, provisional traveling is possible by promoting the discharge of hydrogen gas from inside the battery frame 5, and traveling of the vehicle can be ensured. In the temporary driving modes 1 and 2, it is desirable to flash the warning light to prompt the driver for repair.

When the mode is shifted from the step S80 to the temporary running mode 3, the steps S157 to S15 are executed.
8, the vent door 65, the foot door 67, and the differential door 69 are fully closed, and the process proceeds to step S160. Then, in step S160, it is determined whether or not the vehicle is stopped. If the answer is NO, the battery door 21 is fully opened in step S161 to introduce the traveling wind into the battery frame 5. If YES, step S16
At 2, the battery door 21 is fully closed to prevent backflow from the battery frame 5 into the vehicle interior. And
In step S163, the failed part is repaired.

When the mode is shifted to the provisional traveling mode 4 from the step S79, the process proceeds from the step S159 to the step S59.
Move to 160.

In the temporary running modes 3 and 4, since the blower fan 11 is out of order, the air in the battery frame 5 is air-conditioned by using the running wind during running. During traveling, the battery door 21 is controlled to be fully opened to exhaust air from the battery frame 5, so that the accumulation of hydrogen gas in the frame can be prevented.

In the temporary running modes 3 and 4, it is desirable to flash the warning light to prompt the driver for repair.

[0125]

As will be understood from the above description of the embodiments, according to the air conditioner according to the present invention, the cooling is achieved.
The hot gas from the compressor connected to the unit
It can be switched to a condenser or sub-capacitor.
Thus, the air conditioning in the vehicle compartment and the air conditioning in the battery frame containing the battery can be performed using a common air conditioner. Therefore, the configuration of the air conditioner can be simplified, and the overall weight can be reduced.

Further, the battery can be cooled and heated, the battery can be maintained in a predetermined temperature range, and the life of the battery can be extended.

In the air conditioner according to the present invention,
The air conditioner control unit defines a storage unit of a rotation number determination chart that specifies the rotation number of the blower and a switching opening degree of the battery door based on a relationship between a difference between the set temperature and the vehicle interior temperature and a temperature in the battery frame. Because it has a storage unit for the battery door opening degree determination chart,
It detects the temperature in the vehicle compartment, calculates the difference between the temperature and the set temperature, and searches for the rotation speed of the blower and the switching opening of the battery door quickly by comparing the difference with the detected temperature in the battery frame. The responsiveness is good in response to changes in vehicle interior temperature and changes in battery frame temperature.

In the electric vehicle according to the present invention, the traveling mode setting means sets the traveling mode of the electric vehicle based on the judgments of the blower failure determining means, the intake door failure determining means, the battery door failure determining means, and the door failure determining means. Since the desired traveling mode set in advance is set, the vehicle can travel in the traveling mode corresponding to various failures.

The running mode setting means sets the normal running mode when the blower, the battery door and the various doors are normal, and sets the intake door when only the various doors are out of order. It has a function of holding the battery door on the outside air introduction side, holding the battery door fully open, and setting the tentative running mode 2 in a state where the blower is rotated. Since the air is blown to the frame side, hydrogen gas generated from the battery is discharged to the outside without entering the vehicle interior.

Further, the traveling mode setting means determines whether or not the battery door is in the fully closed position when the blower is normal and the battery door is out of order. The vehicle is allowed to travel for a predetermined time after the occurrence, and is set in a travel prohibition mode 2 in which the high-current circuit is cut off after the travel is stopped. When the vehicle is not in the fully closed position, the doors on the vehicle interior side are fully closed, and the intake door is placed on the outside air introduction side. , And has a function of setting the temporary traveling mode 1 in a state where the blower is rotated.

Therefore, in the travel-prohibited mode 2, the electric vehicle has room to move to a safe place, and the high-power circuit is cut off after the travel is stopped in the safe place. Driving is stopped before the dangerous state of filling the frame occurs.

In the temporary running mode 1, since the doors in the room are fully closed and the air is blown by the blower even when the outside air is introduced, the air from the blower does not flow into the room without the air flowing into the room. Since the gas flows into the frame, the vehicle is in a running state while discharging the hydrogen gas generated from the battery from the battery frame, so that the accumulation of the hydrogen gas can be prevented.

The traveling mode setting means determines whether or not the battery door has failed if the blower has failed and the intake door has failed. If not, the traveling mode setting means has been described. In the case of a failure, the driver is advised to stop, and a function is set to a driving prohibition mode 1 in which the high-current circuit is cut off after stopping the driving.

Therefore, in the traveling prohibition mode 2, as described above, the traveling performance of the vehicle is ensured.

In the traveling prohibition mode 1, it is recommended that the vehicle be stopped immediately, and the high-power circuit is cut off after the vehicle is stopped. Therefore, safety can be ensured by immediately moving to a safe place and stopping. is there.

Further, the traveling mode setting means determines whether or not the battery door is faulty if the blower is faulty and the intake door is normal, and if it is faulty, it is in the fully closed position. If the battery door is not fully closed, it is set to the above-mentioned travel inhibition mode 1; When the door is broken, the doors on the indoor side are fully closed. When the vehicle is not running, the battery door is fully closed. When the battery door is normal and the door on the indoor side is normal and stopped, the battery door is fully closed. When the vehicle is running, the battery door is fully opened. To do

Therefore, in the prohibition modes 1 and 2, the traveling property of the vehicle is ensured as described above.

In the temporary running mode 3, the doors on the indoor side are in the fully closed state, and the battery door is held in the fully closed state while the vehicle is stopped. Backflow is prevented, the battery door is fully opened during traveling, and the traveling wind is introduced into the battery frame to discharge the hydrogen gas in the battery frame, so that the accumulation of hydrogen gas can be prevented.

Further, in the driving mode 4, the battery door is fully closed during the stop, and the battery door is fully opened during the running. Therefore, it is possible to prevent the backflow of hydrogen gas from the battery frame into the room when the vehicle is stopped. In addition, during traveling, the hydrogen gas in the battery frame can be discharged using the traveling wind, thereby preventing accumulation of the hydrogen gas.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view conceptually showing an air conditioner according to the present invention and an electric vehicle including the air conditioner.

FIG. 2 is a schematic explanatory view schematically showing an air conditioner according to an embodiment of the present invention.

FIG. 3 is a control block diagram schematically showing a relationship between an actuator, a sensor, and an air conditioner control unit of the air conditioner according to the present invention.

FIG. 4 is a flowchart showing a blower fan failure self-diagnosis mode.

FIG. 5 is a flowchart showing an intake door failure self-diagnosis mode.

FIG. 6 is a flowchart showing a battery door failure self-diagnosis mode.

FIG. 7 is a flowchart showing a vent door failure self-diagnosis mode.

FIG. 8 is a flowchart showing a foot door failure self-diagnosis mode.

FIG. 9 is a flowchart showing a differential door failure self-diagnosis mode.

FIG. 10 is a flowchart showing a failure confirmation mode.

FIG. 11 is a flowchart showing a failure confirmation mode.

FIG. 12 is a flowchart showing a normal traveling mode.

FIG. 13 is a flowchart showing switching of the condenser and determination of the blower fan speed.

FIG. 14 is a flowchart showing a battery door opening determination.

FIG. 15 is a flowchart showing a battery door opening determination.

FIG. 16 is a flowchart showing a normal operation operation.

FIG. 17 is a flowchart showing an operation in travel inhibition modes 1 and 2;

FIG. 18 is a flowchart showing an operation in provisional traveling modes 1 and 2;

FIG. 19 is a flowchart showing the operation in temporary running modes 3 and 4.

20A is an explanatory diagram showing a chart for determining the number of rotations of the blower fan, and FIG. 20B is a diagram showing a chart for determining the opening of the battery door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric vehicle 3 Battery 5 Battery frame 7 Air conditioner 11 Blower (blower fan) 13 Cooling unit 15 Condenser 17 Indoor duct 19 Battery duct 21 Battery door

Claims (8)

(57) [Claims] 1. A blower, an intake door capable of switching air sucked into the blower between outside air and inside air, a cooling unit capable of cooling air blown by the blower, and a connection to the cooling unit Comp
A main condenser that cools the hot gas from the reservoir,
And sub-condenser of the air warming be passed through the cooling unit, and the indoor duct for guiding the air that has passed through the sub-condenser to the room, the air having passed through the sub-condenser, to lead to interior and battery frame battery A battery duct branched from the indoor duct, and a battery door capable of switching air to the indoor duct side or the battery duct side and adjusting a switching opening degree at a branch position between the indoor duct and the battery duct, and a rotation and the intake door and the battery door switching換開degree as well as freely controlling the necessity of the heated air that has passed through the cooling unit air conditioner control unit of the air blower, the compressor
The hot gas from the reservoir is transferred to the main condenser or the
An air conditioner for an electric vehicle, wherein the air conditioner is configured to be switchable to a sub-condenser . 2. An air blower and air taken into the blower.
The air intake door can be switched between outside air and inside air.
Cooling that can cool the air sent by the blower
Unit and the compressor connected to this cooling unit
A main condenser that cools the hot gas from the reservoir,
Air passing through the cooling unit can be heated
Sub-condenser and air passing through this sub-condenser
And the sub-condenser,
The air that has passed through is passed through the battery
Battery that branches off from the indoor duct to lead to the frame
Lead duct, the indoor duct and the battery duct
At the branch position of the air to the indoor duct side or
Switchable to battery duct side and switchable opening degree is adjustable
Battery door, the rotation of the blower and the
Switch between the work door and battery door and the cooling
Control of air heating after passing through the
Air conditioner control unit,
The hot gas from the reservoir is transferred to the main condenser or the
The air conditioner control unit is configured to be freely switchable to a sub-condenser, and the air conditioner control unit is configured to rotate the blower based on a relationship between a difference between a set temperature and a detected vehicle interior temperature and a temperature in the battery frame. air conditioning system in that electric vehicles be characterized by having a storage unit of the rotational number determining chart defines the number. 3. An air blower and air taken into the blower.
The air intake door can be switched between outside air and inside air.
Cooling that can cool the air sent by the blower
Unit and the compressor connected to this cooling unit
A main condenser that cools the hot gas from the reservoir,
Air passing through the cooling unit can be heated
Sub-condenser and air passing through this sub-condenser
And the sub-condenser,
The air that has passed through is passed through the battery
Battery that branches off from the indoor duct to lead to the frame
Lead duct, the indoor duct and the battery duct
At the branch position of the air to the indoor duct side or
Switchable to battery duct side and switchable opening degree is adjustable
Battery door, the rotation of the blower and the
Switch between the work door and battery door and the cooling
Control of air heating after passing through the
Air conditioner control unit,
The hot gas from the reservoir is transferred to the main condenser or the
The air conditioner control unit is configured to be capable of switching to a sub-condenser, and the air conditioner control unit is configured to switch a battery door based on a relationship between a difference between a set temperature and a detected vehicle interior temperature and a temperature in the battery frame. air conditioning system in that electric vehicles be characterized by having a storage portion of the battery door opening decision chart defining the opening. 4. An air conditioner comprising: a blower failure determining means for determining a blower failure in the air conditioner; an intake door failure determining means for determining an intake door failure in the air conditioner; and a battery door failure determination in the air conditioner. Battery door failure determining means for performing, a door failure determining means for performing a failure determination of various doors of a vent door, a foot door and a differential door in an air conditioner, and a traveling mode of the electric vehicle is set in advance based on the determinations of the various failure determining means. And a driving mode setting means for setting a desired driving mode. 5. The traveling mode setting means, when the determination by the blower failure determination means is normal, the determination by the battery door failure determination means is normal, and the determination by the door failure determination means is normal, If only the determination of the door failure determination means is a failure, the battery door is kept fully open, the intake door is kept on the outside air introduction side, and the blower is rotated. The electric vehicle according to claim 4, further comprising a function of setting a temporary driving mode 2. 6. The traveling mode setting means determines whether or not the battery door is in the fully closed position when the determination by the blower failure determination means is normal and the determination by the battery door failure determination means is a failure. When the vehicle is in the fully closed position, the vehicle is allowed to travel for a predetermined time after the occurrence of a failure, and is set in a travel prohibition mode 2 in which the high-power circuit is cut off after the vehicle stops. 6. The electric vehicle according to claim 4, further comprising a function of fully closing the intake door, holding the intake door on the outside air introduction side, and setting a temporary running mode 1 in a state where the blower is rotated. . 7. The travel mode setting means determines whether the battery door is faulty when the determination by the blower fault determination means is a failure and the determination by the intake door failure determination means is a failure. If it is not a failure, the vehicle is allowed to run for a predetermined time after the occurrence of the failure, and is set in a travel prohibition mode 2 in which the high-power circuit is cut off after the travel is stopped. 7. The electric vehicle according to claim 4, further comprising a function of setting a traveling prohibition mode 1 for cutting. 8. The running mode setting means determines whether or not the battery door is faulty if the determination by the blower failure determining means is a failure and the determination by the intake door failure determining means is normal. In the case of a failure, it is determined whether or not the battery door is in the fully open position. If the battery door is not malfunctioning and the judgment by the door malfunction judging means is malfunction, the driver is advised to stop the vehicle if it is not in the fully closed position and the driver is advised to stop and the high-power circuit is cut off after the running is stopped. Is set to the temporary driving mode 3 in which the doors on the vehicle interior side are fully closed, the battery door is fully closed when traveling is stopped, and the battery door is fully closed when traveling. And If the battery door is not faulty and the judgment of the door failure judgment means is normal, it is determined whether or not it is stopped.If it is stopped, the battery door is fully closed.If not, the battery door is fully opened. The electric vehicle according to any one of claims 4 to 6, further comprising a function of setting a temporary driving mode (4).