JP2013256288A - Control device of vehicle air-conditioner system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device of a vehicle air conditioner system, configured to achieve temperature management so as not to interfere with charging/discharging a battery, and to satisfy output request for a vehicle indoor air conditioner.SOLUTION: A vehicle air-conditioner system 1 includes: a vehicle indoor air conditioner unit 30; a battery cooling unit 20 cooling an in-vehicle battery for operation formed of a plurality of battery cells; a refrigerant circulation circuit 40 supplying refrigerant to the vehicle indoor air conditioner unit 30 and the battery cooling unit 20. A control device for the vehicle air-conditioner system 1 includes: a solenoid valve 34 disposed in the refrigerant circulation circuit 40 to cut off the refrigerant to be supplied to vehicle indoor air conditioner unit 30; a temperature detection means 12 detecting each battery temperature of a plurality of battery cells; and a control means 50 setting a representative battery temperature based on each battery temperature detected by the temperature detecting means 12, and controlling the solenoid valve 34 based on the representative battery temperature.

Description

  The present invention relates to a control device for a system that cools a running battery mounted on a vehicle using a refrigerant of an air conditioner for a vehicle interior.

A hybrid vehicle (HEV) using an engine and a motor as a drive source and an electric vehicle (EV) using a motor as a drive source are equipped with a secondary battery (hereinafter also simply referred to as a battery) that can be regeneratively charged by the motor. Sometimes power is supplied to the motor by discharging the battery. A high-voltage and large-capacity battery is applied to this battery in order to drive a high-output traveling motor.
Charging / discharging of this battery is performed by a chemical reaction, and this chemical reaction is accompanied by heat generation. Charging and discharging are repeated while the vehicle is running, and the amount of heat generated is large, so cooling is necessary. As a general battery characteristic, if the battery is charged / discharged at an excessively high temperature, the battery will deteriorate, and if the battery is charged / discharged at an excessively low temperature, the battery will deteriorate. . Normally, if the battery temperature becomes excessively high or excessively low, it is necessary to protect the battery by regulating the charge / discharge amount or prohibiting charge / discharge. Come on. For this reason, the temperature management regarding the battery mounted in the vehicle is required.

Considering the heat generation during charging and discharging as described above, it is important to manage the battery temperature so that the battery temperature does not become excessively high.
Therefore, a technology for cooling such a vehicle-mounted battery has been developed. However, it is necessary to suppress the cost of the device for cooling the battery and suppress the increase in the vehicle price, and various technologies have been proposed. ing.

  For example, Patent Document 1 discloses a technique for cooling by introducing cold air blown from an air conditioner for a vehicle interior into a power storage mechanism such as a battery. In addition, when the temperature of the battery, the outside air temperature, and the set temperature of the vehicle interior air conditioner are each equal to or higher than a predetermined temperature, the rotation speed of the blower that cools the battery is increased, and the cooling air of the vehicle interior air conditioner is supplied to the battery. It is also disclosed to cool it by introducing it into

On the other hand, Patent Document 2 discloses an apparatus in which a battery cooling unit that cools a traveling battery and a vehicle interior air conditioner that air-conditions a vehicle interior are arranged in parallel to use a common refrigerant.
In the technique of Patent Document 1, the cooling air that cools the battery depends on the vehicle interior temperature, and the vehicle interior air conditioner control and the battery cooling control cannot be controlled independently. In this case, the refrigerant is commonly used for the indoor air conditioner and the battery cooling. However, since the cooling air can be individually controlled, the vehicle air conditioner control and the battery cooling control can be controlled independently.

Japanese Patent No. 2007-171098 Japanese Patent No. 2003-279180

By the way, in the configuration in which the refrigerant is shared between the battery cooling unit and the vehicle interior air conditioner unit, for example, when the outside air temperature is high, the refrigerant supply request of the battery cooling unit and the refrigerant supply request of the vehicle interior air conditioner unit are If both are large, it may be impossible to meet the requirements of both units.
Of course, if the compressor, condenser, cooling fan, etc. of the refrigerant circuit are of sufficient capacity, the requirements of both units can always be met. However, the equipment cost and weight of the refrigerant circuit system are increased. In the case of a vehicle, since the installation space is limited, the degree of freedom in designing the refrigerant circulation circuit is lowered, and the fuel consumption is also deteriorated due to an increase in weight. Therefore, even if the refrigerant supply capacity is limited, control for effectively sharing the refrigerant between the battery cooling unit and the vehicle interior air conditioner unit is required.

  In this case, in particular, if the temperature of the battery is not properly controlled, it is necessary to protect the battery by regulating the charge / discharge amount of the battery or prohibiting the charge / discharge, which hinders the running of the vehicle, Since the vehicle may not be able to travel, it is important that the battery cooling unit is always managed so that the temperature of the battery does not hinder charging / discharging. Conversely, as long as the battery is appropriately temperature-controlled, it is desirable to respond as much as possible to the operation demands of the passengers of the vehicle to the air conditioner unit for the passenger compartment.

  The present invention has been devised in view of the above-described problems, and the battery cooling unit and the vehicle interior air conditioner unit share the refrigerant, and there is no problem in charging / discharging the battery even if the refrigerant supply capacity is limited. It is an object of the present invention to provide a control device for a vehicle air conditioner system capable of satisfying both temperature management to be in a state and responding to an output request for a vehicle interior air conditioner.

  In order to achieve the above object, a control device for a vehicle air conditioner system according to the present invention comprises: A vehicle air conditioner system control device comprising a vehicle air conditioner unit and a refrigerant circulation circuit for supplying refrigerant to the battery cooling unit, the control device for the vehicle air conditioner unit being provided in the refrigerant circulation circuit, A representative valve temperature based on each battery temperature detected by the temperature detection means, a temperature detection means for detecting each battery temperature of the plurality of battery cells, and a representative battery temperature; Control means for controlling the solenoid valve based on the battery temperature.

The control means may be configured such that when the vehicle interior air conditioner unit and the battery cooling unit are both operating, the representative battery temperature is equal to or higher than an upper limit temperature defined as a temperature that is a certain level higher than the normal temperature range. When it rises, it is preferable to close the solenoid valve and shut off the refrigerant supply to the vehicle interior air conditioner unit.
In addition, the battery cooling unit includes a battery cooling evaporator and a battery cooling blower, and further includes a rapid cooling request unit that makes a rapid cooling request to the vehicle interior air conditioner unit. When the battery temperature is in the normal temperature range, it is preferable to limit the operation of the battery cooling blower if the rapid cooling requesting unit makes the rapid cooling request.

  The vehicle interior air conditioner unit includes an air conditioner evaporator and an air conditioner blower, and further includes an inside / outside air mode switching means for switching the intake of cold air by the vehicle interior air conditioner unit between an inside air mode and an outside air mode, When the representative battery temperature is higher than the normal temperature range and lower than the upper limit temperature, the control means sets the inside / outside air mode switching means to the inside air mode and operates the air conditioner blower. It is preferable to limit.

Moreover, it is preferable to further include a second electromagnetic valve provided in the refrigerant circulation circuit and capable of interrupting a refrigerant supply to the battery cooling unit.
Further, the vehicle interior air conditioner unit is provided with a rapid cooling request means for requesting rapid cooling, and when the representative battery temperature is in the normal temperature range, the control means includes the rapid cooling request means. If a cooling request is made, it is preferable that the second electromagnetic valve is closed to shut off the refrigerant supply to the battery cooling unit.
Further, it is preferable that the control means sets the average of the upper predetermined number from the highest temperature of each battery temperature detected by the temperature detection means as the representative battery temperature.
Moreover, it is preferable that the said control means sets the thing of the highest temperature of each battery temperature detected by the said temperature detection means to the said representative battery temperature.
Moreover, it is preferable that the said control means sets the average of each battery temperature detected by the said temperature detection means to the said representative battery temperature.
The control means preferably sets the battery temperature of a specific battery cell among the battery temperatures detected by the temperature detection means to the representative battery temperature. For example, the specific battery cell is the one having the lowest cooling effect among the plurality of battery cells because it is arranged in a place where the cooling air is difficult to reach.

According to the control device for a vehicle air conditioner system of the present invention, the representative battery temperature is set based on each battery temperature of the plurality of battery cells detected by the temperature detecting means, and the solenoid valve is set based on the representative battery temperature. Control. For example, the control means closes the solenoid valve and shuts off the refrigerant supply to the vehicle interior air conditioner when the representative battery temperature rises above the upper limit temperature defined as a temperature that is a certain level higher than the normal temperature range. To do. As a result, all the refrigerant can be supplied to the battery cooling unit, the battery can be cooled to the maximum, and the battery temperature can be appropriately controlled without charge / discharge of the battery being regulated at all.
That is, when the temperature of the battery becomes excessively high, the battery deteriorates unless charging / discharging is regulated. Therefore, it is desired to control the temperature so that the battery can be used without regulating charging / discharging. Normally, a temperature range sufficiently lower than the temperature at which charging / discharging must be regulated is set as the normal temperature range, and in this temperature range, it is unnecessary to regulate the air conditioner unit for the vehicle interior, When the regulation start temperature is approached, it is necessary to give priority to battery cooling.

  Therefore, an upper limit temperature is set for the representative battery temperature, and when the representative battery temperature rises above the upper limit temperature, the solenoid valve is closed and all the refrigerant is supplied to the battery cooling unit so that the battery can be cooled to the maximum. Thus, if the representative battery temperature is not raised to the regulation start temperature, there is no need to regulate charging / discharging. Thereby, the driving | running | working of the vehicle using the electric power of a battery and the charge to a battery can be performed without regulating at all.

In addition, when the representative battery temperature is in the normal temperature range, if the rapid cooling request means makes a rapid cooling request, the operation of the battery cooling blower is restricted to cool the vehicle interior with priority. Can do. Even when the passenger compartment is preferentially cooled, the battery can be charged and discharged without hindrance because the representative battery temperature is in the normal temperature range.
In addition, when the representative battery temperature is higher than the normal temperature range and lower than the upper limit temperature, the inside / outside air mode switching means is set to the inside air mode, and the operation of the air conditioner blower is restricted, thereby cooling the interior of the vehicle interior. The battery can be preferentially cooled while enabling the battery.

Also, when the representative battery temperature is within the normal temperature range, if the rapid cooling request means makes a rapid cooling request, the second solenoid valve is closed and all the refrigerant is supplied to the vehicle interior air conditioner unit. It is possible to cool the interior of a limited vehicle. At this time, since the representative battery temperature is within the normal temperature range, it is not necessary to cool the battery.
As the representative battery temperature, if a value obtained by averaging the upper predetermined number from the highest temperature of each battery temperature detected by the temperature detecting means is set, ensuring the safety of each battery cell and It is possible to achieve both output requirements.
In addition, if the maximum temperature of each battery temperature detected by the temperature detecting means is set as the representative battery temperature, it is possible to prevent battery deterioration from proceeding without restricting charge / discharge of any battery cell. it can.
In addition, if the average of each battery temperature detected by the temperature detecting means is set as the representative battery temperature, even if the detected temperature is detected to be excessively high due to a failure of some temperature detecting means, the battery cooling is excessive. Priority can be suppressed.
In addition, if the battery temperature of a specific battery cell such as the one having the lowest cooling effect among the plurality of battery cells is set to the representative battery temperature, the number of temperature detection means can be reduced and the configuration can be simplified. .
In this way, it is possible to achieve both temperature management for making the battery in a state that does not hinder charging / discharging and responding to the output request for the air conditioner for vehicle interior.

1 is a refrigerant circuit diagram showing a vehicle air conditioner system according to an embodiment of the present invention. It is a block diagram which shows the control apparatus of the vehicle air conditioner system concerning one Embodiment of this invention. It is a flowchart explaining the subroutine which shows the battery cooling control in control of the vehicle air conditioner system concerning one Embodiment of this invention. It is a flowchart explaining control of the vehicle air conditioner system concerning one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a refrigerant circuit diagram showing a vehicle air conditioner system, FIG. 2 is a block diagram showing a control device for the vehicle air conditioner system, and FIG. 3 is a flowchart for explaining a subroutine showing battery cooling control in the control of the vehicle air conditioner system. It is. FIG. 4 is a flowchart for explaining the operation of the control device of the vehicle air conditioner system.
[Constitution]
The vehicle air conditioner system according to this embodiment is applied to an electric vehicle (EV) using a motor as a drive source or a hybrid vehicle (HEV) using an engine (internal combustion engine) and a motor (electric motor) as drive sources. In particular, the battery cooling unit is equipped to cool a secondary battery (hereinafter also simply referred to as a battery) that supplies electric power to a traveling motor.

Hereinafter, the configuration of the vehicle air conditioner system, the configuration of the control device, and the operation and effect thereof will be described in order.
(Configuration of vehicle air conditioning system)
First, the configuration of a vehicle air conditioner (air conditioner) system according to the present embodiment will be described.

As shown in FIG. 1, the vehicle air conditioner system 1 includes a battery cooling unit 20 disposed in a battery case 10, a vehicle interior air conditioner unit 30 that air-conditions a vehicle interior, and these units 20, And a refrigerant circulation circuit 40 for supplying the refrigerant to 30.
The refrigerant circulation circuit 40 includes pipes 40a, 40b, and 40c that circulate the refrigerant.
The pipe 40a is shared by the units 20 and 30, and a compressor 41 and a condenser 42 provided with a cooling fan 43 are interposed in the pipe 40a. The refrigerant is liquefied by the compressor 41, the liquefaction of the refrigerant is promoted by the condenser 42, and the refrigerant is cooled and supplied to the battery cooling unit 20 and the vehicle interior air conditioner unit 30.

The pipes 40b and 40c are arranged in parallel with each other, and both are connected to the pipe 40a. The battery cooling unit 20 is interposed in the piping 40b, and the vehicle interior air conditioning unit 30 is interposed in the piping 40c.
In the battery case 10, a high-voltage secondary battery (battery) 11 that energizes the traveling motor during power running and can be regeneratively charged during braking is hermetically housed. In the present embodiment, the battery 11 is configured as a high voltage battery in which a plurality of low voltage battery cells 11a to 11n are connected in series.

  The battery cooling unit 20 cools the battery 11 by sending cold air into the space in which the battery 11 is hermetically stored. The battery cooling unit 20 supplies a cooling air to a battery cooling evaporator 21 that cools the atmosphere by absorbing heat accompanying vaporization of the internal refrigerant, and supplies the cooling air into a space in which the battery 11 is hermetically housed. The battery cooling blower 23 is provided. A decompression device 22 is interposed in the refrigerant inflow portion of the pipe 40 b to the battery cooling evaporator 21, and the decompressed refrigerant is introduced into the evaporator 21.

  The vehicle interior air conditioner unit 30 includes a vehicle interior evaporator 31 that cools the atmosphere by absorbing heat accompanying vaporization of the internal refrigerant, and a vehicle interior blower 33 that blows air to the vehicle interior evaporator 31 and supplies cooling air to the vehicle interior. And. A decompression device 32 is interposed at the refrigerant inflow portion of the pipe 40 c into the vehicle interior evaporator 31, so that the decompressed refrigerant is introduced into the evaporator 31.

In the battery case 10, a battery temperature sensor (temperature detection means) 12 is provided. In addition, an electromagnetic valve 34, which is an electromagnetic on-off valve, is interposed upstream of the decompression device 32 at the refrigerant inflow portion of the pipe 40c into the vehicle interior evaporator 31.
This vehicle is equipped with a max switch (rapid cooling request means) 60 for requesting rapid cooling of the vehicle interior air conditioner unit 30. The max switch 60 is an independent switch provided on a control panel or the like in the vehicle cabin where a vehicle occupant can request rapid cooling in the vehicle cabin. Note that the rapid cooling request means is not limited to the max switch 60. When a predetermined condition is satisfied based on the vehicle interior temperature, the set temperature of the vehicle interior air conditioner operated by the vehicle occupant, or the set air volume, means for inputting the predetermined condition (for example, vehicle A setting button for the indoor air conditioner, a combination of a temperature sensor for detecting the temperature inside the vehicle and the setting button) may be used as the rapid cooling request means. In this case, whether or not the predetermined condition is satisfied corresponds to an on / off state of the max switch 60 described later.

Further, the introduction duct 71 upstream of the vehicle interior blower 33 of the vehicle interior air conditioner unit 30 is switched between an inside air mode for introducing the inside air (circulated air in the vehicle interior) and an outside air mode for introducing the outside air (air outside the vehicle compartment). A mode damper (inside / outside air mode switching means) 70 is provided.
The battery temperature sensor 12, the electromagnetic valve 34, the max switch 60, and the mode damper 70 are components related to the present control device, and details thereof will be described in detail in the description of the configuration of the control device below. .
(Configuration of control device)
As shown in FIG. 2, the control device for the vehicle air conditioner system according to the embodiment includes a solenoid valve 34 based on information from the battery temperature sensor 12, the max switch 60, the battery temperature sensor 12, and the max switch 60. It comprises a mode damper 70, a battery cooling blower 23, and a control computer (control means) 50 for controlling the vehicle interior blower 33.

The control computer 50 is a computer including a CPU, a ROM, a RAM, an input / output circuit, and the like, and appropriate devices are attached or connected thereto.
The control computer 50 receives a detection signal of the battery temperature Tbr detected by the battery temperature sensor 12.
As the battery temperature Tbr detected by the battery temperature sensor 12, it is desired to directly grasp the internal temperature of each battery, but since this detection is difficult, a temperature close to the internal temperature of each battery is detected. For example, the surface temperature of each of the plurality of battery cells 11a to 11n can be measured, and the surface temperature of the battery cell can be handled as the battery temperature Tbr. In this case, the surface temperature of each of the battery cells 11 a to 11 n is detected as the battery temperature Tbr, and any detection information is input to the control computer 50.

The control computer 50 sets a representative battery temperature Tb as a control parameter based on the battery temperature Tbr of each of the battery cells 11a to 11n. There are several possible methods for setting the representative battery temperature Tb as follows.
(1) The maximum temperature of each battery temperature Tbr is set as the representative battery temperature Tb.
(2) Let the average of each battery temperature Tbr be the representative battery temperature Tb.
(3) A value obtained by averaging the upper predetermined number from the highest temperature of each battery temperature Tbr is set as the representative battery temperature Tb.

  The setting method of (1) is a case where there is a variation in the cooling effect due to the cooling air of the battery cooling blower 23 depending on the arrangement position of the battery cell 11x, or a variation in each battery temperature Tbr due to an individual difference of the battery cell 11x. In addition, since “the representative battery temperature Tb is set to the highest temperature of each battery temperature Tbr”, it is possible to prevent battery deterioration from proceeding without restricting charge / discharge of any battery cell 11x.

In the setting method (2), when there is little variation in the battery temperature Tbr, “the average of each battery temperature Tbr is set as the representative battery temperature Tb”. Therefore, the detection temperature becomes excessive due to a failure of some battery temperature sensors 12. Even when it is detected to be high, excessive priority of battery cooling can be suppressed. It is possible to satisfy both the output demand for the air conditioner unit for the vehicle interior.
Even if the battery temperature Tbr has some variation, the setting method of (3) is “representing the average of the upper predetermined number from the highest temperature of each battery temperature Tbr as the representative battery temperature Tb”. Securing the safety of each of the battery cells 11a to 11n and the output request for the vehicle interior air conditioner unit can both be achieved.

  The representative battery temperature Tb is set by, for example, setting the surface temperature Tbr of the specific battery cell 11x having the lowest cooling effect among the plurality of battery cells 11a to 11n by, for example, being arranged in a place where the cooling air is difficult to reach. It may be the temperature Tb. As described above, when the surface temperature Tbr of the specific battery cell 11x is the representative battery temperature Tb, only one battery temperature sensor 12 has to be provided, so that the manufacturing cost can be reduced and the configuration can be simplified.

  Further, as the battery temperature Tbr, instead of the surface temperature of the battery cells 11a to 11n, (1) the temperature of the space in which the battery 11x is accommodated may be applied, and (2) preset in the battery case 10. As the ambient temperature of the battery 11, the temperature in a place where the cooling air is difficult to reach such as the end of the battery case may be used as the case internal temperature Tbr. The case internal temperature Tbr and the ambient temperature Tbr correlate with and correspond to the actual battery temperature Tbr and can be replaced.

In addition, an operation signal indicating the on / off state of the max switch 60 is input to the control computer 50.
The memory of the control computer 50 or the external memory attached to the control computer 50 has a temperature sufficiently lower than the regulation start temperature Tb1 at which charging / discharging of the battery 11 is regulated and the regulation start temperature Tb1 at which charging / discharging is regulated. A temperature between the normal temperature range (temperature range defined by the normal temperature range upper limit temperature Tb3 and the normal temperature range lower limit temperature Tb4), the regulation start temperature Tb1 and the normal temperature range upper limit temperature Tb3, and the battery The upper limit temperature Tb2 giving priority to the cooling of 11 is preset and stored. That is, the level relationship between these temperatures Tb1 to Tb4 is Tb1 (regulation start temperature)> Tb2 (upper limit temperature)> Tb3 (normal temperature range upper limit temperature)> Tb4 (normal temperature range lower limit temperature).

The control computer 50 controls opening / closing of the solenoid valve 34, switching control of the mode damper 70 between the outside air introduction mode and the inside air introduction mode, and the battery cooling blower 23 and the vehicle interior blower 33, respectively. Control the number of revolutions.
When the battery temperature Tb is equal to or higher than the upper limit temperature Tb2, the electromagnetic valve 34 closes the electromagnetic valve 34, which is an on-off valve, to shut off the refrigerant to the air conditioner evaporator 31. Further, when the vehicle interior air conditioner control request is not made, the electromagnetic valve 34 is closed.

When the battery temperature Tb is equal to or higher than the normal temperature range upper limit temperature Tb3 and lower than the upper limit temperature Tb2, the mode damper 70 seals the outside air introduction duct 71b and circulates the air inside the vehicle cabin so that the inside air introduction duct 71a is circulated. Circulate the air.
When the battery temperature Tb is lower than the normal temperature range upper limit temperature Tb3 and the max switch 60 is in the ON state, the battery cooling blower 23 is suppressed in operation in order to suppress the cooling air discharge amount. The suppression of the discharge amount is controlled by reducing the rotational speed of the blower. This reduction in the rotational speed is set to, for example, half of the rotational speed during the blower fully open operation.

  The cooling of the battery is performed (ON) when the battery temperature Tb becomes equal to or higher than the preset blower operation start temperature Tb5, and is ended (OFF) when the battery temperature Tb becomes lower than the preset blower operation stop temperature Tb6. It has become. The on / off control of the battery cooling is performed by the on / off control of the battery cooling blower 23. The blower operation start temperature Tb5 and the blower operation stop temperature Tb6 are set in advance as values in the normal temperature range (temperature range defined by the normal temperature range lower limit temperature Tb4 and the normal temperature range upper limit temperature Tb3). The blower operation stop temperature Tb6 is set lower than the blower operation start temperature Tb5, and thus the control is stabilized by providing the control threshold value with hysteresis. Therefore, the level relationship between these temperatures Tb3 to Tb6 is Tb3 (normal temperature range upper limit temperature)> Tb5 (blower operation start temperature)> Tb6 (blower operation stop temperature)> Tb4 (normal temperature range lower limit temperature). .

Regarding the operation of the vehicle interior blower 33, when the battery temperature Tb is equal to or higher than the normal temperature range upper limit temperature Tb3 and lower than the upper limit temperature Tb2 and is in the inside air mode, the blower rotational speed is decreased. For example, the blower rotation speed corresponding to the operation amount of the operation switch (set air volume) for controlling the air conditioning in the vehicle interior is halved or limited to half the rotation speed when the blower is fully opened.
[Action and effect]
First, the operation (action) of the control device for the vehicle air conditioner system according to the present embodiment will be described.

  The battery cooling control is performed by steps S1 to S7 as shown in the flowchart of FIG. It starts when the ignition switch of a vehicle engine (not shown) is turned on. Further, the following steps S1 to S7 are periodically performed at a predetermined control period until the ignition switch is turned off. The flag Fbc is set to 1 when battery cooling is performed, and the flag Fbc is set to 0 when battery cooling is not performed. First, it is determined whether Fbc = 1 (step S1). When the flag Fbc is not 1, it is determined whether the battery temperature Tb is equal to or higher than the blower operation start temperature Tb5 (step S2). When the battery temperature Tb is equal to or higher than the blower operation start temperature Tb5, the flag Fbc = 1 is set. (Step S3). Then, the operation of the battery cooling blower 23 is started and the battery cooling is turned on (step S4). When the battery temperature Tb is lower than the blower operation start temperature Tb5, the process returns. If the flag Fbc = 1, it is determined whether the battery temperature Tb is lower than the blower operation stop temperature Tb6 (step S5). If the battery temperature Tb is lower than the blower operation stop temperature Tb6, the flag Fbc = 0. (Step S6). Then, the operation of the battery cooling blower 23 is started and the battery cooling is turned off (step S7). If the battery temperature Tb is equal to or higher than the blower operation stop temperature Tb6, the process returns.

  Next, as shown in the flowchart of FIG. 4, the control of the vehicle air conditioner system starts when the ignition switch of a vehicle engine (not shown) is turned on. Further, the following steps S10 to S410 are periodically performed until the ignition switch is turned off. First, it is determined whether or not the above-described battery cooling is on (during operation) (step S10). It is determined whether or not the vehicle interior air conditioner is on (operating) (step S20). These steps S10 and S20 may be performed simultaneously or in the reverse order. Next, when the vehicle interior air conditioner is on (operating), it is determined whether the battery temperature Tb is equal to or higher than the upper limit temperature Tb2 (step S30). When the battery temperature Tb is equal to or higher than the upper limit temperature Tb2, the electromagnetic valve 34 is shut off, the refrigerant supply to the vehicle interior air conditioner unit 30 is stopped (step S40), and the battery cooling blower 23 is fully opened (step S40). S50). Note that the solenoid valve 34 is a normally open on-off valve that circulates refrigerant when not controlled.

  When the battery temperature Tb is lower than the upper limit temperature Tb2, the electromagnetic valve 34 is opened to allow the refrigerant to flow through the vehicle interior air conditioner unit (step S100), and whether the battery temperature Tb is equal to or higher than the normal temperature range upper limit temperature Tb3. Determination is made (step S110). When the battery temperature Tb is equal to or higher than the normal temperature range upper limit temperature Tb3, it is determined whether or not the internal air mode is set (step S120). If it is determined that the mode is not the inside air mode, the mode damper 70 is operated to switch to the inside air mode (step S130). Then, the rotation of the vehicle interior blower 33 is reduced (step S140).

  If the battery temperature Tb is lower than the normal temperature range upper limit temperature Tb3, it is determined whether the max switch 60 is in the ON state (step S200). If the max switch 60 is on, the operation of the battery cooling blower 23 is suppressed (step S210). When the max switch 60 is off, the battery cooling blower 23 is fully opened (step S310).

When the battery cooling is off (inactive), the solenoid valve 34 is opened to allow the refrigerant to flow through the vehicle interior air conditioner unit (step S400), and the indoor air conditioner control operation switch (set temperature, set air volume, etc.) The vehicle interior blower 23 is normally operated in accordance with the operation amount (step S410).
When the vehicle interior air conditioner is off (inactive), the solenoid valve 34 is shut off to stop the supply of refrigerant to the vehicle interior unit 30 (step S300), and the battery cooling blower 23 is fully opened (step S300). Step S310).

In the example shown in FIG. 4, the temperature thresholds are set to be the same at the start and end of the control. However, in consideration of the control stability, an increase in the battery temperature Tb is determined as in the example shown in FIG. 3. It is also preferable to reduce the threshold value for determining the decrease in the battery temperature Tb by a minute amount with respect to the threshold value.
Therefore, according to the control device for a vehicle air-conditioning system according to the present embodiment, the following effects can be obtained.

  According to the control device for the vehicle air conditioner system, when the battery temperature Tb is equal to or higher than the upper limit temperature Tb2 or when the vehicle interior air conditioner control request is not made, the control computer 50 shuts off the electromagnetic valve 34 and supplies the refrigerant. All can be supplied to the battery cooling unit, the battery can be cooled as much as possible, the temperature of the battery 11 can be appropriately controlled, and charging / discharging of the battery 11 can be performed without any restrictions.

  That is, since the battery 11 deteriorates unless the battery temperature Tb becomes excessively high unless charging / discharging is regulated, it is desired to manage the temperature so that the battery 11 can be used without regulating charging / discharging. Normally, a temperature range sufficiently lower than the temperature at which charging / discharging must be regulated is set as the normal temperature range, and in this temperature range, it is unnecessary to regulate the air conditioner unit for the vehicle interior, When approaching the regulation start temperature Tb1, it is necessary to give priority to cooling of the battery 11.

  In this apparatus, an upper limit temperature Tb2 is set for the battery temperature Tb, and when the battery temperature Tb rises to the upper limit temperature Tb2 or higher, the solenoid valve 34 is closed and all the refrigerant is supplied to the battery cooling unit 23 to maximize the battery. If the battery temperature Tb is not raised to the regulation start temperature Tb1 so that the battery can be cooled, it is not necessary to regulate charge / discharge. Thereby, the driving | running | working of the vehicle using the electric power of the battery 11 and the charge to the battery 11 can be performed without regulating at all.

  Further, when the battery temperature Tb set based on the battery temperature Tbr detected by the battery temperature sensor 12 is in the normal temperature range, the operation of the battery cooling blower 23 is performed if the max switch 60 is in the on state. Limit. For this reason, by suppressing the heat absorption accompanying the vaporization of the refrigerant in the battery cooling evaporator 31, the heat absorption efficiency of the refrigerant in the vehicle interior air conditioner unit 30 is relatively improved, so that the vehicle interior can be preferentially cooled. it can. When the vehicle interior is preferentially cooled, since the battery temperature Tb is in the normal temperature range, the battery 11 can be charged / discharged without any trouble without restricting charging / discharging. When the battery temperature Tb is higher than the blower operation start temperature Tb5, the battery 11 is cooled by the battery cooling blower 23 whose operation is restricted. When the battery temperature Tb is lower than the blower operation stop temperature Tb6, the battery 11 is not cooled by the battery cooling blower 23, and the heat absorption efficiency of the refrigerant in the vehicle interior air conditioner unit 30 is relatively improved. Can be cooled with priority. Even with a limited refrigerant supply capacity, the heat absorption efficiency of the refrigerant of each unit 20, 30 can be controlled, and the temperature management and the output request for the air conditioner in the vehicle interior to make the battery in a state that does not hinder charging and discharging Can be compatible with

  When the battery temperature Tb set based on the battery temperature Tbr detected by the battery temperature sensor 12 is higher than the normal temperature range and lower than the upper limit temperature Tb2, the mode damper 70 sets the inside air mode. At the same time, by restricting the operation of the vehicle interior blower 33, the battery 11 can be preferentially cooled while the vehicle interior can be cooled. Even with a limited refrigerant supply capacity, the heat absorption efficiency of the refrigerant of each unit 20, 30 can be controlled, and the temperature management and the output request for the air conditioner in the vehicle interior to make the battery in a state that does not hinder charging and discharging Can be compatible with

[Others]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

The control of the vehicle air conditioner system is not a collective control by the control computer 50, but includes a unit control microcomputer (microcomputer) for unit control of the battery cooling unit 20 and the vehicle interior air conditioner unit 30, respectively. The control computer 50 may perform integrated control of the microcomputer for use.
For example, the electromagnetic valve 34 may be an electromagnetic valve 34 whose opening degree can be adjusted, such as an electromagnetic proportional flow control valve, instead of an open / close electromagnetic valve. Further, the control computer 50 may control to gradually reduce the opening degree of the electromagnetic valve 34 as the battery temperature Tb approaches the upper limit temperature Tb3 from the normal temperature range upper limit temperature Tb2. According to these configurations, since cooling priority of the battery 11 is gradually given, it is possible to prevent the cooling effect of the air conditioner unit for the passenger compartment from changing suddenly. Further, if the battery temperature Tb is equal to or higher than the upper limit temperature Tb2, the electromagnetic valve 34 is shut off, so that all the refrigerant is supplied to the battery cooling unit 23 so that the battery can be cooled to the maximum. If the battery temperature Tb is not raised to the regulation start temperature Tb1, it is not necessary to regulate charge / discharge. Thereby, the driving | running | working of the vehicle using the electric power of the battery 11 and the charge to the battery 11 can be performed without regulating at all.

  The blower rotational speed reduction control by suppressing the operation of the battery cooling blower 23 may be performed over the entire rotational speed during the blower fully open operation. The control for reducing the rotational speed of the vehicle interior blower 33 may be performed over the entire rotational speed during the blower fully-open operation. According to these controls, even if the refrigerant supply capacity is more limited, the heat absorption efficiency of the refrigerant of each of the units 20 and 30 can be controlled, and the temperature management is performed so that the battery does not interfere with charging and discharging. And meeting the output requirements for air conditioners for vehicle interiors.

  Further, as indicated by a two-dot chain line in FIG. 1, a solenoid valve (second solenoid valve) 24 may be interposed in the pipe 40b. When the battery temperature Tb is lower than the normal temperature range upper limit temperature Tb3 and the max switch 60 is in the ON state, the battery temperature Tb is changed to the blower operation stop temperature Tb6 instead of suppressing the operation of the battery cooling blower 23. When it becomes smaller, the electromagnetic valve 24 may be closed to block the refrigerant to the battery cooling evaporator 31. According to this configuration, it is possible to prioritize the cooling of the passenger compartment more efficiently. In addition, this solenoid valve 24 is good also as restrict | squeezing the solenoid valve 24 as the battery temperature Tb approaches the blower operation stop temperature Tb6 as the solenoid valve 24 whose opening degree can be adjusted. According to this configuration, it is possible to prioritize cooling in the vehicle compartment gradually and efficiently, and it is possible to prevent the cooling effect of the air conditioning unit for vehicle compartment from changing suddenly.

  The present invention can be applied to a hybrid vehicle (HEV) using an engine and a motor as drive sources and an electric vehicle (EV) using a motor as a drive source.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner system 10 Battery case 11 Battery 12 Battery temperature sensor 20 Battery cooling unit 21 Battery cooling evaporator 23 Battery cooling blower 24 Electromagnetic valve (second electromagnetic valve)
30 Car interior air conditioner 31 Car interior evaporator 33 Car interior blower 34 Solenoid valve 40 Refrigerant circulation circuit 41 Compressor 42 Capacitor 50 Control computer (control means)
60 Max switch (rapid cooling request means)
70 mode damper (inside / outside air mode switching means)
71 Introduction duct 71a Inside air introduction duct 71b Outside air introduction duct

Claims (10)

A vehicle interior air conditioner unit, a battery cooling unit that cools a vehicle-mounted traveling battery composed of a plurality of battery cells, and a refrigerant circulation circuit that supplies refrigerant to the vehicle interior air conditioner unit and the battery cooling unit. In addition, a control device for a vehicle air conditioner system,
An electromagnetic valve provided in the refrigerant circulation circuit and capable of interrupting a refrigerant supply to the vehicle interior air conditioner unit;
Temperature detecting means for detecting each battery temperature of the plurality of battery cells;
And a control means for setting a representative battery temperature based on each battery temperature detected by the temperature detection means and controlling the solenoid valve based on the representative battery temperature. Air conditioner system control device. The control means includes
When the vehicle interior air conditioner unit and the battery cooling unit are both operating, and the representative battery temperature rises above an upper limit temperature defined as a temperature higher than a normal temperature range by a certain level, the solenoid valve is 2. The control device for a vehicle air conditioner system according to claim 1, wherein the controller is closed to shut off a refrigerant supply to the vehicle interior air conditioner unit. 3. The battery cooling unit includes a battery cooling evaporator and a battery cooling blower,
The vehicle interior air conditioner unit is provided with rapid cooling request means for requesting rapid cooling,
When the representative battery temperature is in the normal temperature range, the control means limits the operation of the battery cooling blower if the rapid cooling request means makes the rapid cooling request. The control device for a vehicle air conditioner system according to claim 1 or 2. The vehicle interior air conditioner unit includes an air conditioner evaporator and an air conditioner blower,
An inside / outside air mode switching means for switching the intake of the cold air by the vehicle interior air conditioner unit between an inside air mode and an outside air mode,
When the representative battery temperature is higher than the normal temperature range and lower than the upper limit temperature, the control means sets the inside / outside air mode switching means to the inside air mode and operates the air conditioner blower. The control device for a vehicle air conditioner system according to any one of claims 1 to 3, wherein the control device is limited. The vehicle air conditioner system according to any one of claims 1 to 4, further comprising a second electromagnetic valve provided in the refrigerant circulation circuit and capable of interrupting a refrigerant supply to the battery cooling unit. Control device. The vehicle interior air conditioner unit is provided with rapid cooling request means for requesting rapid cooling,
If the representative battery temperature is in the normal temperature range, the control means closes the second electromagnetic valve and sends the battery cooling unit to the battery cooling unit if the rapid cooling request means makes the rapid cooling request. The vehicle air conditioner system control device according to claim 5, wherein the refrigerant supply is cut off. The control means includes
7. The representative battery temperature is set by averaging the upper predetermined number from the highest temperature of each battery temperature detected by the temperature detecting means. Control device for vehicle air conditioning system. The control means includes
The control device for an air conditioner system for a vehicle according to any one of claims 1 to 6, wherein the temperature of each battery temperature detected by the temperature detecting means is set to the representative battery temperature. . The control means includes
The control device for a vehicle air conditioner system according to any one of claims 1 to 6, wherein an average of the battery temperatures detected by the temperature detection means is set to the representative battery temperature. The control means includes
The vehicle air conditioner according to any one of claims 1 to 6, wherein a battery temperature of a specific battery cell among the battery temperatures detected by the temperature detection means is set to the representative battery temperature. System control unit.

Images