JP2006143183A - Battery cooling device for vehicle use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery cooling device for vehicle use capable of reducing the cost. <P>SOLUTION: The air suction mode can be switched among the inside air mode in which the air sucked by a battery cooling blower 15 to cool a battery 3 for vehicle use is the air inside a vehicle passenger compartment, the outside air mode in which the sucked air is the air outside a vehicle passenger compartment, and the cooling air mode in which the sucked air is the air cooled by an evaporator 23 of a rear seat side air conditioner 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle battery cooling device, and more particularly to a vehicle battery cooling device that cools a battery mounted on a vehicle including an air conditioner.

  2. Description of the Related Art Conventionally, a vehicle battery cooling device that cools a battery mounted on a hybrid vehicle or an electric vehicle cools the battery by blowing air sucked from the vehicle interior to the battery by a battery cooling fan. And the air volume of the battery cooling fan is changed according to the temperature of the battery so as to keep the temperature of the battery at about 40 ° C. from the viewpoint of life and safety.

Furthermore, for example, Patent Document 1 discloses a battery cooling device that can cool a battery without being greatly affected by disturbances such as solar radiation and heat of an exhaust pipe. The battery cooling device disclosed in Patent Document 1 has an inside air blowing mode for sucking vehicle interior air and blowing it to the battery, and an outside air blowing mode for sucking outside vehicle air and blowing it to the battery. Sometimes it has cooling means to cool the air sent to the battery.
JP 2004-255960 A

  However, since the battery cooling device described in Patent Document 1 has a dedicated cooling means, for example, at the intake port in the inside air blowing mode, the cost increases.

  This invention is made | formed in view of such a situation, and it aims at providing the battery cooling device for vehicles which can aim at cost reduction.

  (1) A vehicle battery cooling device of the present invention is applied to a vehicle equipped with an air conditioner having a cooling means for cooling passing air, and the vehicle battery cooling device for cooling a vehicle battery mounted on the vehicle. A battery cooling blower that blows intake air onto the vehicle battery, an inside air mode in which the intake air is in the vehicle interior air, an outside air mode in which the intake air is outside the vehicle interior, and the intake air in the air conditioner And mode switching means that can be switched to any one of a cooling air mode that is air immediately after being cooled by the cooling means.

  That is, it has an intake port that can take in three types of air, inside air, outside air, and cooling air. The cooling air is air immediately after being cooled by the cooling means of the air conditioner. That is, three types of air, that is, the inside air, the outside air, and the cooling air can be reliably taken in without providing a dedicated cooling means. In this way, since no dedicated cooling means is provided, the cost can be reduced.

  The mode switching means may perform switching in the order of the outside air mode, the inside air mode, and the cooling air mode. Energy saving can be achieved by setting the priority to the outside air mode, the inside air mode, and the cooling air mode. Since the intake air in the cooling air mode is air immediately after being cooled by the cooling means, the consumption energy is the largest because the cooling means is used. The intake air in the inside air mode is air-conditioned air. This conditioned air is often generated when the air conditioner is driven. That is, in the inside air mode, energy from the air conditioner is consumed, although not as much as in the cooling air mode. Since the intake air in the outside air mode is the outside air itself, no energy is consumed. Therefore, energy consumption can be reduced by the mode switching means switching in the above order.

  Further, when the temperature of the air outside the passenger compartment is equal to or lower than a predetermined temperature, the mode switching means performs switching in the order of the outside air mode, the inside air mode, and the cooling air mode according to the temperature of the vehicle battery, When the temperature of the vehicle exterior air is higher than the predetermined temperature, switching may be performed in the order of the inside air mode and the cooling air mode according to the temperature of the vehicle battery.

  When the temperature of the outside air in the passenger compartment is equal to or lower than the predetermined temperature, the switching process is performed in accordance with the temperature of the vehicle battery starting from the outside air mode. When the temperature of the air outside the passenger compartment is higher than the predetermined temperature, the process is started from the inside air mode and the switching process is performed according to the temperature of the vehicle battery. For example, if the predetermined temperature is 30 ° C., the vehicle battery may be cooled so as to be maintained at about 40 ° C. Therefore, when the temperature of the air outside the vehicle compartment is equal to or lower than the predetermined temperature, the vehicle battery is cooled by the outside air it can. That is, when the temperature of the air outside the passenger compartment is equal to or lower than the predetermined temperature, the outside air mode with the least energy consumption is used. On the other hand, when the temperature of the air outside the passenger compartment is higher than the predetermined temperature, the air outside the passenger compartment cannot be used for cooling the vehicle battery. Therefore, by starting from the inside air mode and performing the switching process according to the temperature of the vehicle battery without using the outside air mode from the beginning, it is possible to prevent relatively high temperature outside air from being blown to the vehicle battery. Can do.

  Here, in the cooling air mode, the intake air blown to the vehicle battery is cooled by the cooling means of the air conditioner, so that the cooling capacity of the vehicle battery is higher than the inside air mode, but the temperature of the outside air of the vehicle compartment is extremely low. In this case (for example, when the temperature is 0 ° C. or lower), the refrigeration cycle constituting the air conditioner cannot be operated, and the intake air cannot be cooled using the cooling means.

  Accordingly, the vehicle exterior air temperature detection means for detecting the temperature of the vehicle exterior air and battery temperature detection means for detecting the temperature of the vehicle battery are further provided, and the mode switching means includes the vehicle exterior air temperature detection Selected from the inside air mode, the outside air mode, and the cooling air mode based on the temperature of the vehicle exterior air detected by the means and the temperature of the vehicle battery detected by the battery temperature detecting means. Either way is good. Further, the mode switching means selects from the inside air mode, the outside air mode, and the cooling air mode according to the temperature of the vehicle battery when the temperature of the air outside the passenger compartment is higher than a first predetermined temperature. The outside air mode may be set when the temperature of the air outside the passenger compartment is equal to or lower than the first predetermined temperature.

  Further, the mode switching means sets the outside air mode when the temperature of the vehicle outside air is higher than the first predetermined temperature and the temperature of the vehicle battery is equal to or lower than a first reference temperature, and When the temperature of the battery is higher than the first reference temperature and lower than or equal to the second reference temperature, the inside air mode is set. When the temperature of the vehicle battery is higher than the second reference temperature, the cooling air mode is set. As the temperature of the air outside the passenger compartment decreases, at least one or both of the first reference temperature and the second reference temperature may be increased. When the first reference temperature is increased as the temperature of the outside air in the passenger compartment decreases, the frequency of use of the inside air mode that consumes more energy than the outside air mode can be reduced to save energy. Further, when the second reference temperature is increased as the temperature of the air outside the passenger compartment decreases, the frequency of use of the cooling air mode, which consumes more energy than the inside air mode, can be reduced to save energy.

  Further, the mode switching means is configured to switch between the inside air mode and the cooling air mode according to the temperature of the vehicle battery when the temperature of the outside air in the passenger compartment is higher than a second predetermined temperature. When the temperature is equal to or lower than the second predetermined temperature, the inside air mode, the outside air mode, and the cooling air mode may be selected according to the temperature of the vehicle battery. That is, it is possible to prevent the relatively high temperature outside the passenger compartment from being blown onto the vehicle battery.

  The mode switching means is configured to switch to the outside air mode when the temperature of the vehicle exterior air is equal to or lower than the second predetermined temperature, and when the temperature of the vehicle battery is equal to or lower than the first reference temperature, the vehicle battery When the temperature of the vehicle battery is higher than the first reference temperature and lower than or equal to the second reference temperature, the inside air mode is set. When the temperature of the vehicle battery is higher than the second reference temperature, the cooling air mode is set. As the outdoor air temperature decreases, at least one or both of the first reference temperature and the second reference temperature may be increased. By increasing the first reference temperature as the temperature of the outside air in the passenger compartment decreases, the use frequency of the inside air mode, which consumes more energy than the outside air mode, can be reduced, and energy saving can be achieved. Further, by increasing the second reference temperature as the temperature of the air outside the passenger compartment decreases, it is possible to reduce the frequency of use of the cooling air mode, which consumes more energy than the inside air mode, and to save energy.

  Further, the intake air in the cooling air mode may be an air-fuel mixture including both the air immediately after being cooled by the cooling means and the vehicle interior air.

  The air cooled by the cooling means is originally used for air conditioning in the passenger compartment, but in the cooling air mode, a part of the cooled air is used to cool the vehicle battery. When a large amount of cooling air is used for cooling the vehicle battery, the air conditioning feeling in the passenger compartment is deteriorated. Therefore, in the cooling air mode, the intake air sucked into the battery cooling fan is an air-fuel mixture including both the air immediately after being cooled by the cooling means and the air in the vehicle interior of the vehicle. The air volume used for battery cooling can be increased without deteriorating the air conditioning feeling in the passenger compartment.

  Further, when the vehicle is provided with an air conditioner for the front seat and the rear seat of the vehicle, the vehicle battery is immediately after being cooled by the cooling means of the air conditioner disposed at the rear of the vehicle in the cooling air mode. It may be cooled by air. That is, the air conditioner mounted on the vehicle is a vehicle front seat side air conditioner disposed on the vehicle front seat side and a vehicle rear seat side air conditioner disposed on the vehicle rear seat side, and the cooling air mode is The intake air may be set to a mode in which the air immediately after being cooled by the cooling means of the rear seat air conditioner is used.

  Thus, in the cooling air mode, the air immediately after being cooled by the cooling means of the vehicle rear seat side air conditioner can be used to reliably perform air conditioning in the vehicle interior by the vehicle front seat side air conditioner. Therefore, the vehicle battery can be reliably cooled without much discomfort for the passenger. Furthermore, when the vehicle battery is disposed at the rear of the vehicle, the distance through which the cooling air passes is shortened, and the thermal loss of the cooling air can be reduced. Of course, the cooling air mode may be a mode in which the intake air is air immediately after being cooled by the cooling means of the vehicle front seat side air conditioner.

  Here, the vehicle exterior air may be air in a trunk room. The trunk room is relatively far from the occupant, and it is difficult for the occupant to hear the suction sound from the trunk room. Therefore, it is possible to suppress the passenger from feeling uncomfortable due to noise such as suction sound.

  (2) Moreover, the vehicle battery cooling device of the present invention is applied to a vehicle equipped with an air conditioner having cooling means for cooling the air passing therethrough, and the vehicle battery for cooling the vehicle battery mounted on the vehicle. In the cooling device, a battery cooling blower for blowing intake air to the vehicle battery, an inside air mode in which the intake air is used as vehicle interior air, and air immediately after the intake air is cooled by the cooling means of the air conditioner It can also be said that it is characterized by comprising mode switching means that can be switched to any one of the cooling air modes.

  That is, it has an intake port that can take in two kinds of air, inside air and cooling air, and the cooling air is air immediately after being cooled by the cooling means of the air conditioner. Thereby, it is possible to reliably take in two types of air, that is, the inside air and the cooling air, without providing a dedicated cooling means. In this way, since no dedicated cooling means is provided, the cost can be reduced.

  As described above, the cooling air mode has a higher battery cooling capacity than the inside air mode, but cools the intake air using the cooling means of the vehicle air conditioner when the temperature of the air outside the vehicle compartment is extremely low. It has the characteristic that it cannot be done.

  Therefore, the vehicle battery cooling device of the present invention further includes a vehicle exterior air temperature detection unit that detects a temperature of the vehicle exterior air, and a battery temperature detection unit that detects the temperature of the vehicle battery, wherein the mode The switching means is configured to switch between the inside air mode and the cooling air mode based on a temperature of the outside air detected by the outside air temperature detecting means and a temperature of the vehicle battery detected by the battery temperature detecting means. Either one is good. Further, the mode switching means switches to either the inside air mode or the cooling air mode according to the temperature of the vehicle battery when the temperature of the vehicle compartment outside air is higher than a predetermined temperature, The inside air mode may be set when the temperature is equal to or lower than the predetermined temperature.

  In addition, when the temperature of the vehicle exterior air is low, the temperature of the vehicle interior air is often relatively low. Therefore, when the temperature of the outside air in the passenger compartment is higher than the predetermined temperature, the mode switching means switches to the inside air mode when the temperature of the vehicle battery is equal to or lower than a reference temperature, and the temperature of the vehicle battery is When the cooling air mode is set when the temperature is higher than the reference temperature, and the reference temperature is increased as the temperature of the air outside the vehicle outside the vehicle decreases, the frequency of use of the cooling air mode that consumes a large amount of energy is reduced, thereby saving energy. Can be planned.

  Further, the intake air in the cooling air mode may be an air-fuel mixture including both the air immediately after being cooled by the cooling means and the vehicle interior air.

  The air cooled by the cooling means is originally used for air conditioning in the passenger compartment, but in the cooling air mode, a part of the cooled air is used to cool the vehicle battery. When a large amount of cooling air is used for cooling the vehicle battery, the air conditioning feeling in the passenger compartment is deteriorated. Therefore, in the cooling air mode, the intake air sucked into the battery cooling fan is an air-fuel mixture including both the air immediately after being cooled by the cooling means and the air in the vehicle interior of the vehicle. The air volume used for battery cooling can be increased without deteriorating the air conditioning feeling in the passenger compartment.

  Further, when the vehicle is provided with an air conditioner for the front seat and the rear seat of the vehicle, the vehicle battery is immediately after being cooled by the cooling means of the air conditioner disposed at the rear of the vehicle in the cooling air mode. It may be cooled by air. That is, the air conditioner mounted on the vehicle is a vehicle front seat side air conditioner disposed on the vehicle front seat side and a vehicle rear seat side air conditioner disposed on the vehicle rear seat side, and the cooling air mode is The intake air may be set to a mode in which the air immediately after being cooled by the cooling means of the rear seat air conditioner is used.

  Thus, in the cooling air mode, the air immediately after being cooled by the cooling means of the vehicle rear seat side air conditioner can be used to reliably perform air conditioning in the vehicle interior by the vehicle front seat side air conditioner. Therefore, the vehicle battery can be reliably cooled without much discomfort for the passenger. Furthermore, when the vehicle battery is disposed at the rear of the vehicle, the distance through which the cooling air passes is shortened, and the thermal loss of the cooling air can be reduced. Of course, the cooling air mode may be a mode in which the intake air is air immediately after being cooled by the cooling means of the vehicle front seat side air conditioner.

  Here, the vehicle exterior air may be air in a trunk room. The trunk room is relatively far from the occupant, and it is difficult for the occupant to hear the suction sound from the trunk room. Therefore, it is possible to suppress the passenger from feeling uncomfortable due to noise such as suction sound.

  (3) Moreover, the vehicle battery cooling device of the present invention is applied to a vehicle equipped with an air conditioner having cooling means for cooling the air passing therethrough, and the vehicle battery for cooling the vehicle battery mounted on the vehicle. In the cooling device, a battery cooling blower for blowing intake air to the vehicle battery, an inside air mode in which the intake air is used as vehicle interior air, and air immediately after the intake air is cooled by the cooling means of the air conditioner A mode switching means capable of switching between a cooling air mode and an air-fuel mixture mode in which the intake air includes both the air in the passenger compartment and the air immediately after being cooled by the cooling means; It can also be said that it is characterized by comprising.

  That is, it has an intake port that can take in three types of air, that is, internal air, cooling air, and a mixture of internal air and cooling air, and the cooling air is air immediately after being cooled by the cooling means of the air conditioner. Yes. Thereby, it is possible to reliably take in three types of air, that is, the inside air, the cooling air, and the air-fuel mixture without providing a dedicated cooling means. In this way, since no dedicated cooling means is provided, the cost can be reduced.

  As described above, the cooling air mode has a higher battery cooling capacity than the inside air mode, but cools the intake air using the cooling means of the vehicle air conditioner when the temperature of the air outside the vehicle compartment is extremely low. It has the characteristic that it cannot be done.

  Accordingly, the vehicle exterior air temperature detection means for detecting the temperature of the vehicle exterior air and battery temperature detection means for detecting the temperature of the vehicle battery are further provided, and the mode switching means includes the vehicle exterior air temperature detection Selected from the inside air mode, the cooling air mode, and the air-fuel mixture mode based on the temperature of the vehicle exterior air detected by the means and the temperature of the vehicle battery detected by the battery temperature detecting means. It should be either. Further, the mode switching means is selected from the inside air mode, the cooling air mode, and the air-fuel mixture mode according to the temperature of the vehicle battery when the temperature of the outside air in the passenger compartment is higher than a predetermined temperature. Anyway, it is good to set it as the said inside air mode, when the temperature of the said vehicle exterior air is below the said predetermined temperature.

  Further, as described above, when the temperature of the air outside the vehicle is low, the temperature in the passenger compartment is often relatively low. Therefore, when the temperature of the vehicle exterior air is higher than the predetermined temperature, the mode switching means switches to the inside air mode when the temperature of the vehicle battery is equal to or lower than a first reference temperature, When the temperature is higher than the first reference temperature and lower than or equal to the second reference temperature, the cooling air mode is set. When the temperature of the vehicle battery is higher than the second reference temperature, the mixture mode is set, and Increasing at least one or both of the first reference temperature and the second reference temperature as the air temperature decreases reduces the frequency of use of the cooling air mode that consumes a lot of energy, thereby saving energy. Can do.

  Further, when the vehicle is provided with an air conditioner for the front seat and the rear seat of the vehicle, the following may be performed. The air conditioner mounted on the vehicle is a vehicle front seat side air conditioner arranged on the vehicle front seat side and a vehicle rear seat side air conditioner arranged on the vehicle rear seat side, wherein the cooling air mode is The intake air is the air immediately after being cooled by the cooling means of the rear seat side air conditioner, and in the air-fuel mixture mode, the intake air is cooled by the air in the vehicle compartment and the cooling means of the rear seat side air conditioner. It is preferable that the air-fuel mixture includes both air immediately after being formed.

  Thus, in the cooling air mode, the air immediately after being cooled by the cooling means of the vehicle rear seat side air conditioner can be used to reliably perform air conditioning in the vehicle interior by the vehicle front seat side air conditioner. Therefore, the vehicle battery can be reliably cooled without much discomfort for the passenger. Furthermore, when the vehicle battery is disposed at the rear of the vehicle, the distance through which the cooling air passes is shortened, and the thermal loss of the cooling air can be reduced. Of course, the cooling air mode may be a mode in which the intake air is air immediately after being cooled by the cooling means of the vehicle front seat side air conditioner.

  Here, the vehicle exterior air may be air in a trunk room. The trunk room is relatively far from the occupant, and it is difficult for the occupant to hear the suction sound from the trunk room. Therefore, it is possible to suppress the passenger from feeling uncomfortable due to noise such as suction sound.

  Next, the present invention will be described in more detail with reference to embodiments.

(First embodiment)
(1) Schematic Configuration of Vehicle Battery Cooling Device and Air Conditioner The vehicle battery cooling device 1 in the first embodiment is applied to a hybrid vehicle including an internal combustion engine and an electric motor as a driving source for traveling. The hybrid vehicle includes a vehicle front seat side air conditioner (not shown) and a vehicle rear seat side air conditioner 2. Here, schematic configurations of the vehicle battery cooling device 1 and the vehicle rear seat side air conditioning device 2 in the first embodiment will be described with reference to FIG. 1. FIG. 1 is a schematic diagram showing a vehicle battery cooling device 1 and a vehicle rear seat side air conditioning device 2. In addition, the vehicle front seat side air conditioner is installed in the vehicle front seat side space, and mainly performs air conditioning of the front seat side in the vehicle interior.

(1.1) Rear seat air conditioner 2
The vehicle rear seat side air conditioner 2 is installed in the vehicle rear seat side space, and mainly performs air conditioning of the rear seat side in the vehicle interior. As shown in FIG. 1, the vehicle rear seat side air conditioner 2 includes an air conditioner case 21, an air conditioner blower 22, an evaporator 23, a heater core 24, an air mix door 25, an air conditioner electronic control device 26, and the like. .

  The air conditioning case 21 is formed with an air intake 27 for taking in air on the rear side of the vehicle interior and an air conditioning air outlet 28 for blowing out the conditioned air on the rear side of the vehicle interior. Further, the air conditioning case 21 divides a passage (the left passage in FIG. 1) in which the evaporator 23 is disposed and a passage (the right passage in FIG. 1) in which the heater core 24 is disposed in the vicinity of the middle of the passage and joins at the downstream side. It has a plate.

  The air conditioner blower 22 is arranged on the upstream side of the air flow in the air conditioning case 21 and blows the passenger compartment air sucked from the air intake port 27 toward the air conditioned air outlet 28 side. The evaporator (cooling means) 23 is disposed in the one side passage (left side passage in FIG. 1) that is downstream of the air flow of the air conditioner blower 22 and branched by the partition plate, and cools the air passing therethrough. The evaporator 23 is one part that constitutes a heat pump cycle. The heat pump cycle includes a condenser that exchanges heat with outside air in the passenger compartment.

  The heater core 24 is disposed on the downstream side of the air flow of the air conditioner blower 22 and in the other side passage (the right side passage in FIG. 1) branched by the partition plate. The heater core 24 heats the passing air using the cooling water of the internal combustion engine as a heat source.

  The air mix door 25 is arranged on the upstream side of the air flow of the partition plate of the air conditioning case 21 and adjusts the opening area between the one side passage where the evaporator 23 is arranged and the other side passage where the heater core 24 is arranged. In other words, the air mix door 25 adjusts the temperature of the conditioned air blown from the conditioned air outlet 28 of the air conditioning case 21.

  An air conditioner electronic control device (hereinafter referred to as “A / C ECU”) 26 switches ON / OFF of the vehicle rear seat air conditioner 2. Specifically, the driving of the refrigeration cycle including the evaporator 23 is switched. Further, the A / C ECU 26 controls the position of the air mix door 25 to adjust the temperature of the conditioned air blown into the vehicle interior.

(1.2) Vehicle battery cooling device 1
The vehicle battery cooling device 1 is a device that is mounted on the trunk room side of the vehicle rear seat side space and cools the vehicle battery 3 that supplies electric power to a traveling electric motor. The vehicle battery cooling device 1 is a separate device from the vehicle front seat air conditioning device and the vehicle rear seat air conditioning device 2 described above. Here, the vehicle battery 3 is a chargeable / dischargeable secondary battery, stores the electric power generated by the generator driven by the internal combustion engine, and supplies the electric power to the traveling electric motor.

  The vehicle battery cooling device 1 includes a battery casing 11, a vehicle interior side duct 12, a trunk side duct 13, an evaporator side duct 14, a battery cooling blower 15, a first suction destination switching door 16, It includes a two-suction destination switching door 17, a battery temperature sensor 18, and a battery cooling electronic control device (hereinafter referred to as "battery cooling ECU") 19.

  The battery casing 11 accommodates the vehicle battery 3 and constitutes a passage for air supplied to the vehicle battery 3. The air flow downstream side of the battery casing 11 communicates with the outside of the passenger compartment.

  The vehicle interior side duct 12 communicates the air flow upstream side of the battery casing 11 and the uppermost stream side of the air conditioning case 21. That is, the air in the passenger compartment is led from the air intake port 27 formed in the air conditioning case 21 to the vehicle battery 3 side, that is, the battery casing 11 side. The trunk side duct 13 communicates the air flow upstream side of the battery casing 11 and a trunk room (not shown). That is, air in the trunk room (hereinafter referred to as “trunk air”) (air outside the vehicle compartment in the present invention) is guided to the vehicle battery 3 side, that is, the battery casing 11 side. The evaporator-side duct 14 communicates the air flow upstream side of the battery casing 11 and the downstream side of the evaporator 23 in the one-side passage where the evaporator 23 is disposed in the air conditioning case 21. That is, the air immediately after being cooled by the evaporator 23 (hereinafter referred to as “cooling air”) is guided to the vehicle battery 3 side, that is, the battery casing 11 side.

  A battery cooling blower (battery cooling blower) 15 is disposed at a joint portion between the battery casing 11 and each of the ducts 12 to 14. The battery cooling blower 15 sucks vehicle interior air from the air intake port 27 toward the battery casing 11 through the vehicle interior duct 12. Further, the battery cooling blower 15 sucks trunk air from the trunk room toward the battery casing 11 via the trunk side duct 13. The battery cooling blower 15 sucks cooling air toward the battery casing 11 through the evaporator side duct 14. The battery cooling blower 15 blows air sucked through the ducts 12 to 14 to the vehicle battery 3.

  The first suction destination switching door 16 is disposed so as to be swingable between the battery casing 11 side of the vehicle interior side duct 12 and the battery casing 11 side of the trunk side duct 13, and the battery casing 11 side of the vehicle interior side duct 12. And the opening on the battery casing 11 side of the trunk side duct 13 are closed.

  The second suction destination switching door 17 is slidably disposed between the battery casing 11 side of the vehicle interior side duct 12 and the battery casing 11 side of the evaporator side duct 14, and the battery casing 11 side of the vehicle interior side duct 12. And the opening on the battery casing 11 side of the evaporator-side duct 14 are closed.

  That is, depending on the positions of the first suction destination switching door 16 and the second suction destination switching door 17, air sucked by the battery cooling blower 15 (hereinafter referred to as “suction air”) is defined as vehicle interior air, trunk air, And cooling air are selected. In other words, the first suction destination switching door 16 and the second suction destination switching door 17 are an inside air mode in which the suction air is the vehicle interior air, and a trunk air mode (the outside air mode in the present invention) in which the suction air is the trunk air. The switching to the cooling air mode using the suction air as the cooling air is possible.

  The battery temperature sensor 18 detects the temperature (hereinafter referred to as “battery temperature”) Tb of the vehicle battery 3.

  The battery cooling ECU 19 inputs the battery temperature Tb from the battery temperature sensor 18 and inputs the outside air temperature Tam detected by the outside air temperature sensor 4. Further, the battery cooling ECU 19 inputs an ON / OFF signal of the vehicle rear seat side air conditioner 2 from the A / C ECU 26. Then, the battery cooling ECU 19 turns on / off the battery cooling blower 15 so that the battery temperature Tb becomes a predetermined temperature (for example, 40 ° C.) or less based on the input battery temperature Tb and vehicle exterior air temperature Tam. The air flow level of the battery cooling blower 15 (hereinafter referred to as “blower level”) is controlled. Further, the battery cooling ECU 19 controls the positions of the first suction destination switching door 16 and the second suction destination switching door 17. In other words, the battery cooling ECU (mode switching means) 19 performs switching processing (mode switching processing) among the inside air mode, the trunk air mode, and the cooling air mode based on various pieces of input information.

(2) Processing Operation of Battery Cooling ECU 19 Next, the processing operation of the battery cooling ECU 19 will be described. As described above, the battery cooling ECU 19 performs ON / OFF switching processing of the battery cooling blower 15, switching processing of the blower level of the battery cooling blower 15, and mode switching processing.

(2.1) ON / OFF Switching Process of Battery Cooling Blower 15 First, the ON / OFF switching process of the battery cooling blower 15 will be described with reference to the flowchart of FIG. FIG. 2 is a flowchart showing ON / OFF switching processing of the battery cooling blower 15.

  As shown in FIG. 2, it is determined whether or not the battery temperature Tb input from the battery temperature sensor 18 is equal to or lower than a first battery temperature threshold Tb_th1 (for example, 32 ° C.) (step S1). When the battery temperature Tb is equal to or lower than the first battery temperature threshold Tb_th1 (step S1: Yes), it is subsequently determined whether or not the battery cooling blower 15 is being driven (step S2). If the battery cooling blower 15 is being driven (ON) (step S2: Yes), the driving of the battery cooling blower 15 is stopped (OFF) (step S3). Then, the process ends. On the other hand, when the battery temperature Tb is equal to or lower than the first battery temperature threshold value Tb_th1 and the battery cooling blower 15 is stopped (OFF) (step S2: No), the process is ended as it is.

  When the battery temperature Tb is higher than the first battery temperature threshold value Tb_th1 (step S1: No), it is subsequently determined whether or not the battery cooling blower 15 is being driven (step S4). When the battery cooling blower 15 is being driven (ON) (step S4: Yes), the process is terminated as it is. On the other hand, when the battery temperature Tb is larger than the first battery temperature threshold Tb_th1 and the battery cooling blower 15 is stopped (OFF) (step S4: No), the battery cooling blower 15 is driven (ON) (step S5). . Then, the process ends.

  That is, when the battery temperature Tb is equal to or lower than the first battery temperature threshold value Tb_th1, the driving of the battery cooling blower 15 is stopped, and when the battery temperature Tb is higher than the first battery temperature threshold value Tb_th1, the battery cooling blower 15 is stopped. Drive.

(2.2) Blower Level Switching Process Based on Battery Temperature Tb Next, the blower level switching process will be described with reference to the flowchart of FIG. FIG. 3 is a flowchart showing a blower level switching process based on the battery temperature Tb.

  As shown in FIG. 3, first, it is determined whether or not the battery cooling blower 15 is being driven (ON) (step S11). If the battery cooling blower 15 is stopped (OFF) (step S11: No), the process is terminated as it is. On the other hand, when the battery cooling blower 15 is being driven (ON) (step S11: Yes), the battery temperature Tb is within a predetermined temperature range at the current blower level (Tb_min (n) ≦ Tb ≦ Tb_max (n )) Is determined (step S12). Here, the predetermined temperature range at the blower level is a temperature range set for each blower level. For example, the temperature range with the lowest blower level is set to 32 ° C. to 35 ° C. or the like. Here, n in the conditional expression indicates the level value of the blower level, Tb_min (n) indicates the lowest temperature of level n, and Tb_max (n) indicates the highest temperature of level n.

  If the battery temperature Tb is within the predetermined temperature range of the current blower level (step S12: Yes), the process is terminated while maintaining the current blower level. On the other hand, when the battery temperature Tb is not within the predetermined temperature range of the current blower level (step S12: No), the battery temperature Tb is lower than the lowest temperature Tb_min (n) in the temperature range of the current blower level. It is determined whether or not (step S13). When the battery temperature Tb is lower than the lowest temperature Tb_min (n) of the current blower level (step S13: Yes), the blower level is lowered by 1 level, and the process ends (step S14). That is, since the vehicle battery 3 is sufficiently cooled, a process for lowering the blower level is performed.

  On the other hand, when the battery temperature Tb is not lower than the lowest temperature Tb_min (n) of the current blower level (step S13: No), that is, the highest temperature Tb_max (n) in the temperature range of the current blower level of the battery temperature Tb. If it is higher, the blower level is increased by 1 and the process is terminated (step S15). That is, since the cooling of the vehicle battery 3 is insufficient at the current blower level, processing for increasing the blower level is performed.

(2.3) Mode Switching Process Next, the mode switching process will be described with reference to FIG. FIG. 4 is a flowchart showing the mode switching process in the first embodiment.

  As shown in FIG. 4, first, it is determined whether or not the outside air temperature Tam is equal to or lower than an outside air temperature threshold Tam_th (for example, 30 ° C.) (step S21). When the passenger compartment outside air temperature Tam is equal to or lower than the outside air temperature threshold Tam_th (step S21: Yes), the mode is switched to the trunk air mode (step S22). Specifically, trunk air is introduced into the battery casing 11 and blown onto the vehicle battery 3.

  When switched to the trunk air mode, it is subsequently determined whether or not the blower level of the battery cooling blower 15 is the highest level (step S23). If the blower level is not the highest level (step S23: No), the determination is repeated until the blower level reaches the highest level. That is, the trunk air mode is maintained until the blower level reaches the highest level.

  On the other hand, when the blower level is the highest level (step S23: Yes), it is further determined whether or not the process of increasing the blower level is being performed in step 15 of FIG. 3 (step S24). If the process of increasing the blower level is not being performed at the highest blower level (step S24: No), the process returns to step S23 and the process is repeated.

  On the other hand, when the blower level is the highest level and the process of increasing the blower level is being performed (step S24: Yes), the mode is switched to the inside air mode (step S25).

  By the way, when the passenger compartment outside air temperature Tam is higher than the outside air temperature threshold Tam_th (step S21: No), it is switched to the inside air mode (step S25).

  When the mode is switched to the inside air mode, it is determined whether or not the blower level is the lowest level (step S26). If the blower level is the lowest level (step S26: Yes), it is further determined whether or not the process of lowering the blower level is being performed in step S14 of FIG. 3 (step S27). If the process of lowering the blower level is about to be performed at the lowest blower level (step S27: Yes), the mode is switched to the trunk air mode (step S22).

  On the other hand, when the blower level is not the lowest level (step S26: No), or when the blower level is the lowest level and the process of lowering the blower level is not being performed (step S27: No), the blower level Is determined to be the highest level (step S28). If the blower level is not the highest level (step S28: No), the process returns to step S26 and the process is repeated.

  On the other hand, when the blower level is the highest level (step S28: Yes), it is further determined whether or not the process of increasing the blower level is being performed in step 15 of FIG. 3 (step S29). When the blower level is the highest level and the process for increasing the blower level is not being performed (step S29: No), the process returns to step S26 and the process is repeated.

  On the other hand, when the process of increasing the blower level is about to be performed at the highest blower level (step S29: Yes), is the vehicle rear seat side air conditioner 2 being driven (ON)? It is determined whether or not (step S30).

  And when the drive device 1 is driving (step S30: Yes), it switches to cooling air mode (step S31). At this time, the battery cooling blower 15 is in a state where the blower level is fixed. Subsequently, it is determined whether the battery temperature Tb is equal to or lower than the second battery temperature threshold value Tb_th2 (step S32). If the battery temperature Tb is higher than the second battery temperature threshold value Tb_th2 (step S32: No), the process is repeated until the battery temperature Tb becomes equal to or lower than the second battery temperature threshold value Tb_th2. On the other hand, when the battery temperature Tb is equal to or lower than the second battery temperature threshold value Tb_th2 (step S32: Yes), the mode is switched to the inside air mode (step 25), and the process is repeated.

  As a result of determining whether or not the drive device 1 is being driven, if the A / C is not being driven (step S31: No), the output of the vehicle battery 3 is maintained while maintaining the inside air mode. The process which reduces is performed (step S33). And it returns to step S26 and repeats a process.

  As described above, when the cabin outside air temperature Tam is equal to or lower than the outside air temperature threshold Tam_th, the switching process is performed in the order of the trunk air mode, the inside air mode, and the cooling air mode. On the other hand, when the passenger compartment outside air temperature Tam is higher than the outside air temperature threshold Tam_th, the switching process is performed in the order of the inside air mode and the cooling air mode.

  In the cooling air mode in the first embodiment, only the cooling air immediately after the intake air is cooled by the evaporator 23 is used. For example, in the cooling air mode, the intake air may be an air-fuel mixture including both cooling air and vehicle interior air. As a result, a large amount of cooling air can be blown to the vehicle battery 3 without impairing the air conditioning feeling in the passenger compartment.

(Second Embodiment)
Next, a second embodiment will be described. The second embodiment is different from the first embodiment only in the mode switching process. Therefore, only the mode switching process will be described below. The mode switching process in the second embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing the mode switching process in the second embodiment.

  As shown in FIG. 5, first, it is determined whether or not the outside air temperature Tam is equal to or lower than a first outside air temperature threshold Tam_th1 (for example, 25 ° C.) (first predetermined temperature in the present invention) (step S41). Then, when the cabin outside air temperature Tam is equal to or lower than the first outside air temperature threshold Tam_th1 (step S41: Yes), the mode is switched to the trunk air mode (step S42). Then, the process ends.

  On the other hand, when the outside air temperature Tam is higher than the first outside air temperature threshold Tam_th1 (step S41: No), the outside air temperature Tam is further set to the second outside air temperature threshold Tam_th2 (for example, 30 ° C.) (in the present invention). It is determined whether or not it is equal to or lower than (second predetermined temperature) (step S43). When the vehicle exterior air temperature Tam is equal to or lower than the second outdoor air temperature threshold Tam_th2 (step S43: Yes), the battery temperature Tb is equal to or lower than the first battery temperature threshold Tb_th3 (first reference temperature in the present invention). It is determined whether or not (step S44). And when battery temperature Tb is below 1st battery temperature threshold value Tb_th3 (for example, 43 degreeC) (step S44: Yes), it switches to trunk air mode (step S42). Then, the process ends.

  On the other hand, when the outside air temperature Tam is higher than the second outside air temperature threshold Tam_th2 (step S43: No), or the outside air temperature Tam is equal to or lower than the second outside air temperature threshold Tam_th2, and the battery temperature Tb is the first battery temperature. If it is higher than the threshold value Tb_th3 (step S44: No), it is further determined whether or not the battery temperature Tb is equal to or lower than a second battery temperature threshold value Tb_th4 (for example, 45 ° C.) (second reference temperature in the present invention). (Step S45). And when battery temperature Tb is below 2nd battery temperature threshold value Tb_th4 (step S45: Yes), it switches to inside air mode (step S46). Then, the process ends.

  On the other hand, when the battery temperature Tb is higher than the second battery temperature threshold value Tb_th4 (step S45: No), it is further determined whether or not the vehicle rear seat air conditioner 2 is being driven (ON) (step S47). . And when the vehicle rear seat side air conditioner 2 is not driving (step 47: No), it switches to inside air mode (step S46). Then, the process ends.

  On the other hand, when the battery temperature Tb is higher than the second battery temperature threshold value Tb_th4 and the vehicle rear seat side air conditioner 2 is being driven (step S47: Yes), the mode is switched to the cooling air mode (step S48). .

  The relationship of the respective modes with respect to the battery temperature Tb and the outside air temperature Tam when the mode is switched in this way will be described with reference to FIG. FIG. 6 is a diagram showing respective modes with respect to the battery temperature Tb and the vehicle exterior air temperature Tam. As shown in FIG. 6, when the cabin outside air temperature Tam is equal to or lower than the first outside air temperature threshold Tam_th1, the trunk air mode is set.

  When the passenger compartment outdoor air temperature Tam is higher than the first outdoor air temperature threshold Tam_th1 and lower than or equal to the second outdoor air temperature threshold Tam_th2, the mode differs depending on the battery temperature Tb. Specifically, when the battery temperature Tb is equal to or lower than the first battery temperature threshold value Tb_th3, the trunk air mode is set, and when the battery temperature Tb is higher than the first battery temperature threshold value Tb_th3 and equal to or lower than the second battery temperature threshold value Tb_th4, the inside air mode is set. . Further, when the battery temperature Tb is higher than the second battery temperature threshold value Tb_th4, the cooling air mode is in principle. However, if the vehicle rear seat air conditioner 2 is not driven, the inside air mode is set when the battery temperature Tb is higher than the second battery temperature threshold value Tb_th4.

  Further, when the passenger compartment outside air temperature Tam is higher than the second outside air temperature threshold Tam_th2, the mode differs depending on the battery temperature Tb. Specifically, when the battery temperature Tb is equal to or lower than the second battery temperature threshold Tb_th4, the inside air mode is set. And when battery temperature Tb is higher than 2nd battery temperature threshold value Tb_th4, it is a cooling air mode in principle. However, if the vehicle rear seat air conditioner 2 is not driven, the inside air mode is set when the battery temperature Tb is higher than the second battery temperature threshold value Tb_th4.

  Here, the relationship between each mode with respect to the battery temperature Tb and the outside air temperature Tam may be as shown in FIG. FIG. 7 is a diagram showing the respective modes for the battery temperature Tb and the vehicle exterior air temperature Tam, as in FIG. 6.

  As shown in FIG. 7, when the vehicle exterior air temperature Tam is higher than the first outdoor air temperature threshold Tam_th1 and equal to or less than the second outdoor air temperature threshold Tam_th2, the first battery temperature threshold Tb_th3 is made different depending on the vehicle outdoor air temperature Tam. ing. Specifically, in the case where the vehicle outside air temperature Tam is higher than the first outside air temperature threshold Tam_th1 and equal to or less than the second outside air temperature threshold Tam_th2, the first battery temperature threshold Tb_th3 is lowered as the vehicle outside air temperature Tam is higher, The lower the air temperature Tam, the higher the first battery temperature threshold Tb_th3.

  In addition to the relationship of the modes shown in FIG. 7, although not shown, for example, when the outside air temperature Tam is higher than the first outside air temperature threshold Tam_th1 and below the second outside air temperature threshold Tam_th2, the second battery temperature threshold Tb_th4 May be made different depending on the outside air temperature Tam. Specifically, in the case where the vehicle exterior air temperature Tam is higher than the first outdoor air temperature threshold Tam_th1 and lower than the second outdoor air temperature threshold Tam_th2, the second battery temperature threshold Tb_th4 is lowered as the vehicle outdoor air temperature Tam increases, The second battery temperature threshold Tb_th4 may be increased as the air temperature Tam is lower.

  Further, although not shown, for example, when the vehicle exterior air temperature Tam is higher than the second exterior air temperature threshold Tam_th1, the second battery temperature threshold Tb_th4 may be made different depending on the vehicle exterior air temperature Tam. Specifically, when the vehicle exterior air temperature Tam is higher than the second exterior air temperature threshold Tam_th2, the second battery temperature threshold Tb_th4 is decreased as the vehicle exterior air temperature Tam is increased, and the vehicle exterior air temperature Tam is decreased. 2 The battery temperature threshold value Tb_th4 may be increased.

  In the cooling air mode in the second embodiment, the intake air may be an air-fuel mixture including both cooling air and vehicle interior air. As a result, a large amount of cooling air can be blown to the vehicle battery 3 without impairing the air conditioning feeling in the passenger compartment.

(Third embodiment)
Next, a third embodiment will be described. The third embodiment is greatly different from the first and second embodiments in that there is no trunk air mode. Specifically, the battery cooling device 1 (not shown) in the third embodiment is configured not to include the trunk side duct 13 and the first suction destination switching door 16 as shown in FIG. The blower ON / OFF switching process and the blower level switching process are the same as those in the first and second embodiments. However, the third embodiment is different from the first and second embodiments in mode switching processing. Therefore, only the mode switching process will be described below. The mode switching process in the third embodiment will be described with reference to FIG. FIG. 8 is a diagram illustrating a relationship of each mode with respect to the battery temperature Tb and the vehicle exterior air temperature Tam in the third embodiment.

  As shown in FIG. 8, the mode switching process in the third embodiment is set to the inside air mode when the outside air temperature Tam is equal to or lower than a predetermined outside air temperature threshold Tam_th3 (Tam_th3 = 0 ° C. in the third embodiment). Further, when the passenger compartment outside air temperature Tam is higher than a predetermined outside air temperature threshold Tam_th3, either the inside air mode or the cooling air mode is set.

  When the outside air temperature Tam is higher than a predetermined outside air temperature threshold Tam_th3, the inside air mode is set when the battery temperature Tb is equal to or lower than the battery temperature threshold Tb_th5 (reference temperature in the present invention), and the battery temperature Tb is set to the battery temperature threshold Tb_th5. If it is higher, the cooling air mode is selected.

  Further, in the third embodiment, the battery temperature threshold value Tb_th5 is made different depending on the vehicle exterior air temperature Tam. Specifically, when the vehicle exterior air temperature Tam is higher than a predetermined exterior air temperature threshold Tam_th3, the battery exterior temperature Tm_th5 is decreased as the vehicle exterior air temperature Tam is increased, and the battery temperature threshold is decreased as the vehicle exterior air temperature Tam is decreased. Increase Tb_th5.

  Thereby, at the time of the low outside air temperature at which the evaporator 23 cannot exhibit the cooling capacity, for example, in the case of 0 ° C. or less, the inside air mode can be set without the cooling air mode.

  Further, when the vehicle interior air temperature Tam increases, the vehicle interior air temperature often increases. In such a case, it is better to make the time point of transition from the inside air mode to the cooling air mode earlier than usual. In the third embodiment, the battery temperature threshold value Tb_th5 using the cooling air mode is lowered as the passenger compartment outdoor air temperature Tam increases. Therefore, when the passenger compartment outdoor air temperature Tam is high, the interior air mode is changed to the cooling air mode earlier. Can be migrated to. On the other hand, when the vehicle exterior air temperature Tam is higher than the predetermined outdoor air temperature threshold Tam_th3, the battery temperature threshold Tb_th5 is increased as the vehicle exterior air temperature Tam is lower. Thereby, the usage frequency of the cooling air mode with much energy consumption can be reduced, and the usage frequency of the inside air mode with little energy consumption can be increased. As a result, energy saving can be achieved.

  In the cooling air mode in the third embodiment, only the cooling air immediately after the intake air is cooled by the evaporator 23 is used. For example, in the cooling air mode, the intake air may be an air-fuel mixture including both cooling air and vehicle interior air. As a result, a large amount of cooling air can be blown to the vehicle battery 3 without impairing the air conditioning feeling in the passenger compartment.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG. FIG. 9 is a diagram illustrating a relationship of each mode with respect to the battery temperature Tb and the vehicle exterior air temperature Tam in the fourth embodiment. The fourth embodiment is different from the third embodiment in that the cooling air mode in the third embodiment is divided into a region using only cooling air and a region using an air-fuel mixture including both cooling air and inside air. Only the differences are the same as in the third embodiment.

  As shown in FIG. 9, the mode switching process in the fourth embodiment is set to the inside air mode when the outside air temperature Tam is equal to or lower than a predetermined outside air temperature threshold Tam_th4 (Tam_th4 = 0 ° C. in the fourth embodiment). In addition, when the passenger compartment outside air temperature Tam is higher than a predetermined outside air temperature threshold Tam_th4, the inside air mode, the air-fuel mixture mode, or the cooling air mode is set. Here, the air-fuel mixture mode is a mode in which the intake air is an air-fuel mixture containing both internal air and cooling air.

  When the outside air temperature Tam is higher than the predetermined outside air temperature threshold Tam_th4, the inside air mode is set when the battery temperature Tb is equal to or lower than the first battery temperature threshold Tb_th6 (first reference temperature in the present invention). Further, when the battery temperature Tb is higher than the first battery temperature threshold Tb_th6 and is equal to or lower than the second battery temperature threshold Tb_th7 (second reference temperature in the present invention), the cooling mode is set. When the battery temperature Tb is higher than the second battery temperature threshold value Tb_th7, the air-fuel mixture mode is set.

  In the fourth embodiment, similarly to the third embodiment, the first and second battery temperature thresholds Tb_th6 and Tb_th7 are made different depending on the vehicle exterior air temperature Tam. Specifically, when the vehicle exterior air temperature Tam is higher than a predetermined exterior air temperature threshold Tam_th4, the first battery temperature threshold Tb_th6 is lowered as the vehicle exterior air temperature Tam is higher, and the vehicle exterior air temperature Tam is lower. 1 Increase the battery temperature threshold Tb_th6. In addition, when the vehicle exterior air temperature Tam is higher than the predetermined exterior air temperature threshold Tam_th4, the higher the vehicle exterior air temperature Tam, the lower the second battery temperature threshold Tb_th7, and the lower the vehicle exterior air temperature Tam, the second battery temperature. The threshold value Tb_th7 is increased.

  Further, in the fourth embodiment, when the cabin outside air temperature Tam is higher than the predetermined outside air temperature threshold Tam_th4 and the battery temperature Tb is higher than the second battery temperature threshold Tb_th7, control is performed so as to increase the blower level. It may be.

(Other)
In the first to fourth embodiments, the evaporator-side duct 14 communicates with the downstream side of the evaporator 23 in the one-side passage where the evaporator 23 is disposed in the air-conditioning case 21 of the vehicle rear seat-side air conditioner 2. I am doing so. That is, the vehicle battery cooling device 1 in the first to fourth embodiments uses the cooling air cooled by the evaporator 23 of the vehicle rear seat air conditioner 2 in the cooling air mode or the air-fuel mixture mode. . However, the invention is not limited to this. For example, the evaporator-side duct 14 may communicate with the downstream side of the evaporator in the air-conditioning case of the vehicle front seat-side air conditioner (not shown). That is, when the vehicle battery cooling device 1 is in the cooling air mode or the air-fuel mixture mode, the cooling air is guided from the vehicle front seat side air conditioner to the battery casing 11 side and cooled by the evaporator of the vehicle front seat side air conditioner. Air may be used. Furthermore, you may apply to the vehicle provided only with a front seat side air conditioner.

1 is a schematic diagram showing a vehicle battery cooling device 1 and a vehicle rear seat side air conditioning device 2. FIG. It is a flowchart which shows the ON / OFF switching process of the battery cooling blower 15. It is a flowchart which shows the blower level switching process based on battery temperature Tb. It is a flowchart which shows the mode switching process in 1st Embodiment. It is a flowchart which shows the mode switching process in 2nd Embodiment. It is a figure which shows each mode with respect to battery temperature Tb and vehicle interior air temperature Tam. It is a figure which shows each mode with respect to other battery temperature Tb and vehicle interior air temperature Tam. It is a figure which shows the mode with respect to battery temperature Tb and vehicle interior air temperature Tam in 3rd Embodiment. It is a figure which shows the mode with respect to battery temperature Tb and vehicle interior air temperature Tam in 4th Embodiment.

Explanation of symbols

1: vehicle battery cooling device, 2: vehicle rear seat side air conditioning device, 3: vehicle battery,
4: Outside air temperature sensor, 11: Battery casing, 12: Inside duct,
13: Trunk side duct, 14: Evaporator side duct,
15: battery cooling blower (battery cooling blower), 16: first suction destination switching door,
17: Second suction destination switching door, 18: Battery temperature sensor,
19: Battery cooling ECU, 22: Air conditioner blower, 23: Evaporator,
24: heater core, 25: air mix door, 26: ECU for A / C

Claims (22)

Applied to a vehicle equipped with an air conditioner having a cooling means for cooling the passing air;
In the vehicle battery cooling device for cooling the vehicle battery mounted on the vehicle,
A battery cooling blower for blowing intake air to the vehicle battery;
Any of an inside air mode in which the intake air is the vehicle interior air, an outside air mode in which the intake air is the vehicle exterior air, and a cooling air mode in which the intake air is air immediately after being cooled by the cooling means of the air conditioner. Mode switching means capable of switching between crab and
A battery cooling device for a vehicle, comprising:   The vehicle battery cooling device according to claim 1, wherein the mode switching means performs switching in the order of the outside air mode, the inside air mode, and the cooling air mode. The mode switching means is
When the temperature of the outside air in the passenger compartment is equal to or lower than a predetermined temperature, the outside air mode, the inside air mode, and the cooling air mode are sequentially switched according to the temperature of the vehicle battery,
3. The vehicle battery according to claim 2, wherein when the temperature of the outside air in the passenger compartment is higher than the predetermined temperature, switching is performed in the order of the inside air mode and the cooling air mode in accordance with the temperature of the vehicle battery. Cooling system. Vehicle exterior air temperature detection means for detecting the temperature of the vehicle exterior air;
Battery temperature detection means for detecting the temperature of the vehicle battery;
Further comprising
The mode switching means is based on the temperature of the outside air detected by the outside air temperature detecting means and the temperature of the vehicle battery detected by the battery temperature detecting means. The vehicle battery cooling device according to claim 1, wherein the vehicle battery cooling device is selected from a mode and a cooling air mode.   The mode switching means is selected from the inside air mode, the outside air mode, and the cooling air mode according to the temperature of the vehicle battery when the temperature of the air outside the passenger compartment is higher than a first predetermined temperature, 5. The vehicle battery cooling device according to claim 4, wherein the outside air mode is set when a temperature of air outside the passenger compartment is equal to or lower than the first predetermined temperature. When the temperature of the vehicle exterior air is higher than the first predetermined temperature and the temperature of the vehicle battery is equal to or lower than a first reference temperature, the mode switching means switches to the outside air mode, When the temperature is higher than the first reference temperature and lower than or equal to the second reference temperature, the inside air mode is set, and when the temperature of the vehicle battery is higher than the second reference temperature, the cooling air mode is set.
6. The vehicular battery cooling device according to claim 5, wherein at least one or both of the first reference temperature and the second reference temperature is increased as the temperature of the outside air in the passenger compartment decreases.   When the temperature of the vehicle exterior air is higher than a second predetermined temperature, the mode switching means is either the interior air mode or the cooling air mode according to the temperature of the vehicle battery, and the temperature of the vehicle exterior air is 5. The vehicle battery according to claim 4, wherein when the temperature is equal to or lower than the second predetermined temperature, the inside air mode, the outside air mode, and the cooling air mode are selected according to the temperature of the vehicle battery. Cooling system. The mode switching means switches to the outside air mode when the temperature of the vehicle exterior air is equal to or lower than the second predetermined temperature, and when the temperature of the vehicle battery is equal to or lower than a first reference temperature, the temperature of the vehicle battery Is set to the inside air mode when the temperature is higher than the first reference temperature and lower than the second reference temperature, and the cooling air mode is set when the temperature of the vehicle battery is higher than the second reference temperature,
The vehicle battery cooling device according to claim 7, wherein at least one or both of the first reference temperature and the second reference temperature is increased as the temperature of the air outside the passenger compartment decreases.   9. The intake air in the cooling air mode is an air-fuel mixture including both air immediately after being cooled by the cooling means and air in the passenger compartment. The vehicle battery cooling device according to claim. The air conditioner mounted on the vehicle is a vehicle front seat side air conditioner disposed on the vehicle front seat side and a vehicle rear seat side air conditioner disposed on the vehicle rear seat side,
10. The mode according to claim 1, wherein the cooling air mode is a mode in which the intake air is air immediately after being cooled by the cooling means of the vehicle rear seat side air conditioner. Vehicle battery cooling device. Applied to a vehicle equipped with an air conditioner having a cooling means for cooling the passing air;
In the vehicle battery cooling device for cooling the vehicle battery mounted on the vehicle,
A battery cooling blower for blowing intake air to the vehicle battery;
A mode switching means capable of switching between an inside air mode in which the intake air is air inside the vehicle and a cooling air mode in which the intake air is air immediately after being cooled by the cooling means of the air conditioner;
A battery cooling device for a vehicle, comprising: Vehicle exterior air temperature detection means for detecting the temperature of the vehicle exterior air;
Battery temperature detection means for detecting the temperature of the vehicle battery;
Further comprising
The mode switching means is based on the outside air temperature detected by the outside air temperature detecting means and the temperature of the vehicle battery detected by the battery temperature detecting means, based on the inside air mode and the cooling air. The vehicle battery cooling device for a vehicle according to claim 11, wherein one of the modes is selected.   The mode switching means switches to either the inside air mode or the cooling air mode according to the temperature of the vehicle battery when the temperature of the outside air of the passenger compartment is higher than a predetermined temperature, and the temperature of the outside air of the passenger compartment is The vehicle battery cooling device according to claim 12, wherein the inside air mode is set when the temperature is equal to or lower than the predetermined temperature. The mode switching means switches to the inside air mode when the temperature of the vehicle exterior air is higher than the predetermined temperature and the temperature of the vehicle battery is equal to or lower than a reference temperature, and the temperature of the vehicle battery is set to the reference temperature. If higher, switch to the cooling air mode,
The vehicle battery cooling device according to claim 13, wherein the reference temperature is increased as the temperature of the air outside the passenger compartment decreases. The air conditioner mounted on the vehicle is a vehicle front seat side air conditioner disposed on the vehicle front seat side and a vehicle rear seat side air conditioner disposed on the vehicle rear seat side,
The said cooling air mode is a mode which makes the said intake air the air immediately after being cooled by the said cooling means of the said backseat side air conditioner, The Claim 11 characterized by the above-mentioned. Battery cooling device for vehicles.   16. The intake air in the cooling air mode is an air-fuel mixture including both air just after being cooled by the cooling means and air in the passenger compartment. The vehicle battery cooling device according to claim. Applied to a vehicle equipped with an air conditioner having a cooling means for cooling the passing air;
In the vehicle battery cooling device for cooling the vehicle battery mounted on the vehicle,
A battery cooling blower for blowing intake air to the vehicle battery;
The inside air mode in which the intake air is the vehicle interior air, the cooling air mode in which the intake air is the air immediately after being cooled by the cooling means of the air conditioner, and the air in the vehicle interior and the cooling Mode switching means capable of switching to any one of the air-fuel mixture mode including the air-fuel mixture immediately after being cooled by the means;
A battery cooling device for a vehicle, comprising: Vehicle exterior air temperature detection means for detecting the temperature of the vehicle exterior air;
Battery temperature detection means for detecting the temperature of the vehicle battery;
Further comprising
The mode switching means is based on the outside air temperature detected by the outside air temperature detecting means and the temperature of the vehicle battery detected by the battery temperature detecting means. 18. The vehicle battery cooling device according to claim 17, wherein the vehicle battery cooling device is selected from an air mode and an air-fuel mixture mode.   The mode switching means is any one selected from the inside air mode, the cooling air mode, and the air-fuel mixture mode according to the temperature of the vehicle battery when the temperature of outside air in the passenger compartment is higher than a predetermined temperature. 19. The vehicle battery cooling device according to claim 18, wherein the inside air mode is set when the temperature of the air outside the passenger compartment is equal to or lower than the predetermined temperature. The mode switching means switches to the inside air mode when the temperature of the vehicle compartment air is higher than the predetermined temperature and the temperature of the vehicle battery is equal to or lower than a first reference temperature, and the temperature of the vehicle battery is The cooling air mode is set when the temperature is higher than the first reference temperature and lower than the second reference temperature, and the mixture mode is set when the temperature of the vehicle battery is higher than the second reference temperature.
The vehicle battery cooling device according to claim 19, wherein at least one or both of the first reference temperature and the second reference temperature is increased as the temperature of the outside air in the passenger compartment decreases. The air conditioner mounted on the vehicle is a vehicle front seat side air conditioner disposed on the vehicle front seat side and a vehicle rear seat side air conditioner disposed on the vehicle rear seat side,
In the cooling air mode, the intake air is air immediately after being cooled by the cooling means of the rear seat air conditioner,
The air-fuel mixture mode is characterized in that the intake air is an air-fuel mixture including both air in the passenger compartment and air immediately after being cooled by the cooling means of the rear seat air conditioner. The vehicle battery cooling device according to any one of 20.   The vehicular battery cooling device according to any one of claims 1 to 21, wherein the vehicle exterior air is air in a trunk room.

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