JP2017128297A - Hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid vehicle that can warm up a battery without depending on a heat storage tank.SOLUTION: A heat exchange section 80 for control is filled with liquid for temperature control. The liquid for temperature control in the heat exchange section 80 for control exchanges heat with a battery pack 100. A first passage 82 is connected to an inlet IN of the heat exchange section 80 for control, and a second passage 84 is connected to an outlet EX. The first passage 82 connects an outlet EX of a heat exchange section 88 for heating for exchanging heat between cooling water in an exhaust heat supply passage 18 and the liquid for temperature control to the inlet IN of the heat exchange section 80 for control via a first passage side valve element V1. The second passage 84 connects an outlet EX of the heat exchange section 80 for control to an inlet IN of the heat exchange section 88 for heating via a second passage side valve element V2. An electric circulation pump 90 for circulating the liquid for temperature control in the first passage 82, the heat exchange section 80 for control, the second passage 84 and the heat exchange section 88 for heating is provided in the first passage 82.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a hybrid vehicle including an internal combustion engine, a rotating electric machine capable of transmitting power to driving wheels, and a battery capable of supplying electric power to the rotating electric machine.

  For example, in Patent Document 1, heat generated by an inverter or motor during vehicle travel is stored in a heat storage tank, and when the outside air temperature is below a reference value when the vehicle door is opened after the vehicle stops, It is described that the battery is warmed up by the heat stored in the tank (paragraph “0043”). As a result, the battery can be warmed up using the heat generated by the inverter or motor during the previous run when the vehicle starts running.

JP 2014-158393 A

However, in the case of the above technique, it is necessary to provide a heat storage tank in order to warm up the battery.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a hybrid vehicle that can warm up a battery without using a heat storage tank.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
1. The hybrid vehicle is a hybrid vehicle including an internal combustion engine, a rotating electric machine capable of transmitting power to drive wheels, and a battery capable of supplying electric power to the rotating electric machine. An adjustment heat exchange section for exchanging heat between the temperature adjustment liquid and the battery, and the temperature adjustment liquid is filled, and heat exchange is performed between the filled temperature adjustment liquid and the exhaust of the internal combustion engine. A heating heat exchanging part, a first port that is a pair of ports of the adjustment heat exchanging part, and a first port that is a pair of ports of the heating heat exchanging part, A first passage for connecting the first port of the second ports, a second passage for connecting the second port of the adjustment heat exchange section and the second port of the heating heat exchange section. 2 passages and temperature control A switching unit that switches whether the liquid for use circulates or stops in a closed loop path formed by the heating heat exchange unit, the first passage, the adjustment heat exchange unit, and the second passage. .

  In the above configuration, the heat of the exhaust gas is given to the temperature adjustment liquid in the heating heat exchange unit, and the heat of the temperature adjustment liquid is given to the battery in the adjustment heat exchange unit. Here, the heat of the exhaust is generated when the internal combustion engine is driven. For this reason, in order to warm up the battery with the temperature adjusting liquid, the heat storage tank is not essential. Therefore, the battery can be warmed up regardless of the heat storage tank.

  2. 2. The hybrid vehicle according to claim 1, further comprising a control device that operates the switching unit to control the temperature of the battery, and the control device acquires a request for enabling the hybrid vehicle to travel; A temperature acquisition processing unit that acquires the temperature of the battery, and a prohibition process that prohibits traveling of the hybrid vehicle when the request acquisition processing unit acquires the request and the temperature of the battery is equal to or lower than a specified value. And when the possible request acquisition processing unit acquires the request and the temperature of the battery is equal to or lower than the specified value, the internal combustion engine is driven and the switching unit is operated to operate the heating heat. A warm-up process for heating the battery by circulating the temperature adjustment liquid in a closed loop path formed by the exchange unit, the first passage, the adjustment heat exchange unit, and the second passage. The and a warming-up processing unit that executes.

  In the above configuration, when the temperature of the battery is equal to or lower than the specified value, the prohibition processing unit prohibits traveling, so that the battery can be prevented from being used in a low temperature state, and the output of the battery is insufficient. Nevertheless, it is possible to suppress a situation in which drivability is lowered or the battery is deteriorated by causing the vehicle to run by the output of the battery. Further, the warm-up processing unit drives the internal combustion engine and operates the switching unit to warm up the battery with the heat of the exhaust gas, whereby the temperature of the battery can be quickly raised.

  3. 2. The hybrid vehicle according to claim 1, wherein the internal combustion engine is capable of transmitting power to the drive wheels while the rotating electrical machine is stopped, and controls the battery temperature by operating the switching unit. The control device includes a start request acquisition processing unit that acquires a start request of the hybrid vehicle, a temperature acquisition processing unit that acquires the temperature of the battery, and the start request acquisition processing unit acquires the start request. And when the temperature of the battery is equal to or lower than a specified value, the hybrid electric vehicle is started by the power of the internal combustion engine in a state where the rotating electrical machine is stopped, and the start request acquisition processing unit acquires the start request and When the temperature of the battery exceeds the specified value, a selection start processing unit that starts the hybrid vehicle with the power of the rotating electrical machine, and the start request acquisition processing unit When the start request is obtained and the temperature of the battery is equal to or lower than the specified value, the switching unit is operated, the heating heat exchange unit, the first passage, and the adjustment heat exchange unit, And a warming-up processing unit that performs a warming-up process of heating the battery by circulating the temperature adjusting liquid in a closed loop path formed by the second passage.

  In the above configuration, when the battery temperature is equal to or lower than the specified value, the selective start processing unit starts the vehicle with the internal combustion engine in a state where the rotating electrical machine is stopped, so that the use of the battery in a low temperature state is suppressed. Therefore, it is possible to suppress a situation in which drivability is lowered or the battery is deteriorated because the output of the battery is insufficient. Further, since the warm-up processing unit operates the switching unit to warm up the battery by the heat of the exhaust, the temperature of the battery can be raised early, and thus the power of the rotating electrical machine can be given to the drive wheels at an early stage. Is possible.

  4). 4. The hybrid vehicle according to any one of 1 to 3, further comprising: a cooling heat exchange section that is filled with the temperature adjustment liquid and that exchanges heat between the filled temperature adjustment liquid and the refrigerant of the air conditioner. And the first passage connects the first port of the adjustment heat exchange section and the first port of the pair of ports of the cooling heat exchange section and the first port of the second ports. The second passage is also a passage for connecting the second port of the adjustment heat exchange unit and the second port of the cooling heat exchange unit, and the switching unit includes The first port of the heat exchanger for heating is communicated with the first passage and the first port of the heat exchanger for cooling is disconnected from the first passage, or the first port of the heat exchanger for heating is Blocking one port from the first passage, and A first passage-side valve body that switches whether the first port of the rejection heat exchange section communicates with the first passage, and the second port of the heating heat exchange section communicates with the second passage; The second port of the cooling heat exchange unit is blocked from the second passage, or the second port of the heating heat exchange unit is blocked from the second passage and the cooling heat exchange unit A second passage-side valve body that switches whether the second port communicates with the second passage, at least one of the valve bodies, the heating heat exchange section or the cooling heat exchange section, the first passage, A circulation pump that circulates the temperature adjustment liquid in a closed loop path formed by the adjustment heat exchange section and the second passage.

  In the above configuration, the adjustment heat exchange section, the first passage, the second passage, and the switching section are used not only when the battery is warmed up but also when it is cooled. For this reason, compared with the case where the apparatus for warming up a battery and the apparatus for cooling are provided with the heat exchange part for adjustment separately, a temperature control apparatus can be reduced in size.

  5. 5. The hybrid vehicle according to claim 4, wherein the air conditioner includes a compressor and an evaporator that performs heat exchange with air sent to a room of the hybrid vehicle, and the cooling heat exchange unit is connected to the compressor from the evaporator. Heat exchange is performed between the flowing refrigerant and the temperature adjusting liquid.

  In the above configuration, the temperature of the refrigerant that exchanges heat with the air that is sent into the vehicle interior is adjusted so that the refrigerant that exchanges heat with the air that is sent into the vehicle interior in the evaporator exchanges heat with the temperature adjustment liquid. The rise due to heat exchange with the liquid is sufficiently suppressed. For this reason, it is possible to sufficiently secure the cold heat of the refrigerant that exchanges heat with the air sent into the vehicle interior while diverting the existing refrigerant passage of the air conditioner.

  6). 6. The hybrid vehicle according to 4 or 5, wherein the battery is a secondary battery, the air conditioner includes a compressor, and includes a control device that controls the temperature of the battery by operating the switching unit, and the control When the battery is charged with electric power supplied from the outside of the hybrid vehicle and the temperature of the battery is equal to or higher than a threshold temperature, the apparatus drives the compressor, and the at least one valve body and The circulation pump is operated to circulate the temperature adjustment liquid in a closed loop path formed by the cooling heat exchange section, the first passage, the adjustment heat exchange section, and the second passage. And a cooling processing unit for cooling the battery.

In the above configuration, when the temperature of the battery rises due to charging, it is possible to suppress the battery temperature from becoming excessively high by cooling the battery.
7). The hybrid vehicle according to any one of the above 1 to 6, wherein the adjustment heat exchanging section is arranged to be able to exchange heat with the battery without using air as a medium.

  When the temperature of a battery is adjusted by exchanging heat between the battery and air using air as a medium, the air needs to be able to flow sufficiently throughout the battery pack on which the battery is mounted. Turn into. On the other hand, in the said structure, since the temperature adjustment liquid and battery of an adjustment heat exchange part are heat-exchanged without making air mediate, it can suppress that a battery pack enlarges.

The block diagram which shows the drive system of the hybrid vehicle concerning 1st Embodiment. The figure which shows the structure of the temperature control system concerning the embodiment. (A) And (b) is a figure which shows the cooling process and warm-up process of a battery by the said temperature control system. The flowchart which shows the procedure of the cooling process at the time of charge concerning the same embodiment, and its execution determination process. The flowchart which shows the procedure of the starting process of the HV system concerning the same embodiment, and its execution determination process. The block diagram which shows the drive system of the hybrid vehicle concerning 2nd Embodiment. The flowchart which shows the procedure of the start process concerning the same embodiment, and its execution determination process.

<First Embodiment>
Hereinafter, a first embodiment of a hybrid vehicle will be described with reference to the drawings.
FIG. 1 shows a drive system of a hybrid vehicle according to the present embodiment. The drive system shown in FIG. 1 constitutes a series / parallel hybrid system. As shown in FIG. 1, the internal combustion engine 10 is mechanically coupled to the carrier C of the planetary gear mechanism (power split mechanism 20), and the motor generator 30 is mechanically coupled to the sun gear S of the power split mechanism 20. The motor generator 32 is mechanically coupled to the ring gear R of the power split mechanism 20. Here, among the three rotating bodies constituting the power split mechanism 20, which are the sun gear S, the carrier C, and the ring gear R, the rotating body to which the target object is mechanically connected is the target first transmitting power. It is a possible rotating body. Further, the drive wheel 34 is mechanically connected to the ring gear R.

  The motor generator 30 is connected to the DCDC converter 40 via the inverter 36, and the motor generator 32 is connected to the DCDC converter 40 via the inverter 38. The DCDC converter 40 is connected to an assembled battery 42 which is a series connection body of battery cells CE via a system main relay (SMR 41). Here, the battery cell CE is a lithium ion secondary battery. The assembled battery 42 is packaged as a battery pack 100. A charger 44 is connected between the SMR 41 and the assembled battery 42 to charge the assembled battery 42 with electric power from a commercial power supply 46 outside the vehicle.

  The control device 50 includes a central processing unit (CPU 52) and a memory 54. The control amount (torque and the like) of the internal combustion engine 10 and the motor generators 30, 32, the output voltage of the DCDC converter 40, and the charging power by the charger 44 are included. , Controlling the open / closed state of the SMR 41. The control device 50 uses an auxiliary battery 56 having a lower voltage and a smaller charging capacity than the assembled battery 42 as a power source. For example, a lead storage battery may be used as auxiliary battery 56.

  The control device 50 detects the detected value of the brake sensor 64 that detects the operation amount Brk of the brake pedal 62, the detected value of the accelerator sensor 68 that detects the operation amount ACCP of the accelerator pedal 66, and the temperature that detects the temperature Tbp of the battery pack 100. The detection value of the sensor 69 and the output signal of the power switch 60 are acquired. The power switch 60 is a switch operated when the user requests that the vehicle can run.

FIG. 2 shows a temperature adjustment system for the assembled battery 42.
A main muffler 14 is provided downstream of the exhaust passage 12 of the internal combustion engine 10. An exhaust heat recovery device 16 is provided upstream of the main muffler 14 in the exhaust passage 12. Part of the exhaust heat supply passage 18 is accommodated in the exhaust heat recovery device 16, and the heat of the exhaust exhausted to the exhaust passage 12 is given to the liquid flowing in the exhaust heat supply passage 18. In the present embodiment, the liquid flowing in the exhaust heat supply passage 18 is the same kind of cooling water as the cooling water flowing in the cylinder block of the internal combustion engine 10 or the passage in the cylinder head.

  On the other hand, the air conditioner 70 includes an electric compressor 72 that compresses the refrigerant, a condenser 74 that cools the compressed refrigerant, an expansion valve 75, a blower fan 78 that sends air to the passenger compartment, and a blower fan 78. And an evaporator 76 for exchanging heat with the refrigerant flowing out of the condenser 74 in the air sent to the chamber. The compressor 72, the condenser 74, the expansion valve 75, and the evaporator 76 constitute a part of a cooling circuit in which the refrigerant circulates. 2 is a portion that connects the evaporator 76 and the compressor 72 in the cooling circuit.

  The adjustment heat exchange unit 80 is filled with an antifreeze liquid (temperature adjustment liquid), and the temperature adjustment liquid in the adjustment heat exchange unit 80 exchanges heat with the battery pack 100. The adjustment heat exchange unit 80 is disposed in contact with the battery pack 100.

  The first passage 82 is connected to the inlet IN of the inlet IN and the outlet EX which are a pair of ports of the adjustment heat exchange unit 80, and the second passage 84 is connected to the outlet EX. The first passage 82 connects the cooling heat exchange unit 86 that exchanges heat between the refrigerant in the connection passage 79 and the temperature adjustment liquid, and the adjustment heat exchange unit 80. Specifically, the first passage 82 connects the outlet EX of the inlet IN and the outlet EX, which are a pair of ports of the cooling heat exchange section 86, to the adjustment heat exchange section 80 via the first passage-side valve body V1. Connect to inlet IN. Further, the first passage 82 connects the heat exchange unit 88 for heating for exchanging heat between the cooling water in the exhaust heat supply passage 18 and the temperature adjustment liquid, and the adjustment heat exchange unit 80. Specifically, the first passage 82 connects the outlet EX of the inlet IN and the outlet EX, which are a pair of ports of the heating heat exchange unit 88, to the adjustment heat exchange unit 80 via the first passage side valve body V1. Connect to inlet IN.

  In the present embodiment, the cooling heat exchange section 86 is a member that constitutes a flow path for the temperature adjusting liquid and that houses a part of the connection passage 79 therein. In the present embodiment, the heating heat exchanging portion 88 is a member that constitutes a flow path for the temperature adjusting liquid and accommodates a part of the exhaust heat supply passage 18 therein. The cooling heat exchanging portion 86 and the heating heat exchanging portion 88 are arranged so as to be spatially separated and air interposed therebetween for heat insulation.

  The second passage 84 connects the outlet EX of the adjustment heat exchange unit 80 to the inlet IN of the cooling heat exchange unit 86 via the second passage side valve body V2. Moreover, the 2nd channel | path 84 connects the exit EX of the heat exchange part 80 for adjustment to the inlet IN of the heat exchange part 88 for heating via the 2nd channel | path side valve body V2.

  The first passage 82 has a temperature in a closed loop path formed by the first passage 82, the adjustment heat exchange unit 80, the second passage 84, the cooling heat exchange unit 86 or the heating heat exchange unit 88. An electric circulation pump 90 for circulating the adjustment liquid is provided.

  The exhaust heat supply passage 18 is provided with an electric exhaust heat supply pump 92 that circulates the cooling water in the exhaust heat supply passage 18. The total weight of the cooling water in the exhaust heat supply passage 18 is smaller than the total weight of the cooling water circulating through the cylinder block and the cylinder head of the internal combustion engine 10.

  In addition, the symbol which pulled the horizontal bar in the circle in FIG. 2 means that the auxiliary battery 56 is used as a power source. That is, in FIG. 2, the compressor 72, the blower fan 78, the circulation pump 90, the exhaust heat supply pump 92, the first passage side valve body V1, and the second passage side valve body V2 use the auxiliary battery 56 as a power source.

  The control device 50 sends operation signals MS1 to MS7 to the first passage side valve body V1, the second passage side valve body V2, the circulation pump 90, the exhaust heat supply pump 92, the compressor 72, the blower fan 78, and the internal combustion engine 10. Manipulate them by outputting.

FIG. 3 shows the cooling process and warm-up process of the assembled battery 42 executed by the control device 50 while outputting the operation signals MS1 to MS7.
FIG. 3A shows a cooling process for the assembled battery 42. In this case, the control device 50 causes the outlet EX of the cooling heat exchanging portion 86 to communicate with the first passage 82 and the outlet EX of the heating heat exchanging portion 88 to the first passage 82 by the first passage side valve body V1. Shut off from. Further, the control device 50 causes the inlet IN of the cooling heat exchanging portion 86 to communicate with the second passage 84 and the inlet IN of the heating heat exchanging portion 88 from the second passage 84 by the second passage side valve body V2. Cut off. The control device 50 drives the compressor 72 and the circulation pump 90.

  As a result, the refrigerant discharged from the compressor 72 is cooled by the condenser 74, flows through the connection passage 79 via the evaporator 76, and takes heat from the temperature adjustment liquid in the cooling heat exchange unit 86. Further, the temperature adjusting liquid in the cooling heat exchanging portion 86 flows into the adjusting heat exchanging portion 80 via the first passage 82, and the adjustment heat exchanging portion 80 takes the heat of the battery pack 100.

  FIG. 3B shows a warm-up process for the assembled battery 42. In this case, the control device 50 causes the outlet EX of the heating heat exchanging portion 88 to communicate with the first passage 82 and the outlet EX of the cooling heat exchanging portion 86 to the first passage 82 by the first passage-side valve body V1. Shut off from. Further, the control device 50 causes the inlet IN of the heating heat exchanging portion 88 to communicate with the second passage 84 and the inlet IN of the cooling heat exchanging portion 86 from the second passage 84 by the second passage side valve body V2. Cut off. The control device 50 drives the internal combustion engine 10, the circulation pump 90, and the exhaust heat supply pump 92.

  Thereby, the cooling water in the exhaust heat supply passage 18 that has received the heat of the exhaust gas in the exhaust heat recovery device 16 circulates in the exhaust heat supply passage 18 by the exhaust heat supply pump 92, and in the heat exchange unit 88 for heating, Heat is applied to the temperature adjusting liquid. The temperature adjusting liquid in the heating heat exchanging unit 88 flows into the adjusting heat exchanging unit 80 through the first passage 82, and heats the battery pack 100 in the adjusting heat exchanging unit 80.

The cooling process of the battery pack 100 shown in FIG. 3A is executed when the assembled battery 42 is charged by power supply from the commercial power supply 46 during parking.
FIG. 4 shows the procedure of the cooling process during charging and the execution determination process. The process shown in FIG. 4 is executed by the CPU 52 executing the program stored in the memory 54. The process shown in FIG. 4 is executed, for example, when a predetermined condition such as that the control device 50 is in an activated state and the charger 44 is connected to an external commercial power supply 46 is satisfied. The

  In the series of processes shown in FIG. 4, the CPU 52 first determines whether or not the assembled battery 42 is being charged (S10). This process may be a process for determining whether or not the assembled battery 42 is charged by operating the charger 44, for example. When determining that the battery is being charged (S10: YES), the CPU 52 acquires the temperature Tbp of the battery pack 100 (S12). Then, the CPU 52 determines whether or not the temperature Tbp is equal to or higher than the threshold temperature TthH (S14). This process is a process for determining whether or not the battery pack 100 needs to be cooled. The threshold temperature TthH is set according to the lower limit value of the temperature at which the battery pack 100 needs to be cooled. When the CPU 52 determines that the temperature is equal to or higher than the threshold temperature TthH (S14: YES), the circulation pump 90 is driven, the compressor 72 is driven, and the first passage side valve body V1 and the second passage side valve body V2 are illustrated. The state described with reference to 3 (a) is set (S16). On the other hand, when determining that the battery is not being charged (S10: NO), or when determining that the temperature is lower than the threshold temperature TthH (S14: NO), the CPU 52 stops the circulation pump 90, and the user performs The compressor 72 is brought into a stopped state on condition that no cooling request for the passenger compartment has been issued (S18).

The CPU 52 once ends the series of processes shown in FIG. 4 when completing the processes of steps S16 and S18.
By performing the process shown in FIG. 4, it can suppress that the temperature of the assembled battery 42 becomes high too much by charge. For this reason, it can suppress that the situation where deterioration of the assembled battery 42 is accelerated | stimulated arises.

The warm-up process of the battery pack 100 shown in FIG. 3B is executed when a request for enabling the vehicle to travel occurs.
FIG. 5 shows the procedure of the HV system start-up process (drive system start-up process shown in FIG. 1) and its execution determination process, which are executed in response to the request for enabling travel. The processing shown in FIG. 5 is executed by the CPU 52 executing the program stored in the memory 54. Note that the process shown in FIG. 5 is executed when a predetermined condition is satisfied, for example, an authentication process indicating that the user is a legitimate user has been completed. Here, the authentication process is, for example, a process of determining that the user is a regular user when it is determined that the portable device is a regular portable machine through communication between the portable device possessed by the user and the control device 50. do it.

  In the series of processes shown in FIG. 5, the CPU 52 first determines whether or not the HV system is in an activated state (S20). Here, the activated state of the HV system is a state where the vehicle can travel, for example, a state where the SMR 41 is in a closed state. When determining that the HV system is not in the activated state (S20: NO), the CPU 52 determines whether or not the brake pedal 62 is depressed and the power switch 60 is turned on (S22). This process is a process for determining whether or not a request for allowing the vehicle to travel has occurred. CPU52 acquires temperature Tbp of the battery pack 100, when it affirmation determinates in step S22 (S24). Then, the CPU 52 determines whether or not the temperature Tbp is equal to or lower than a specified value TthL (S26). This process is a process for determining whether or not the motor generators 30 and 32 are activated to drive the vehicle. That is, when the temperature Tbp is very low, the assembled battery 42 may be deteriorated by the discharge of the assembled battery 42. The specified value TthL is set to an upper limit value (for example, −20 ° C.) of the temperature at which the degree of promoting the deterioration of the assembled battery 42 may exceed the allowable range.

  When it is determined that the CPU 52 exceeds the specified value TthL (S26: NO), it is considered that the degree to which the deterioration of the assembled battery 42 is promoted is within an allowable range even in response to a request for enabling traveling. The system is activated (S28). On the other hand, when it determines with CPU52 being below regulation value TthL (S26: YES), it drives the internal combustion engine 10 (S30). Further, the CPU 52 drives the circulation pump 90 and the exhaust heat supply pump 92 to switch the first passage side valve body V1 and the second passage side valve body V2 to the state shown in FIG. 3B (S32).

  In addition, CPU52 returns to the process of step S24, when the process of step S32 is completed. Further, when the CPU 52 makes an affirmative determination at Step S20, when it makes a negative determination at Step S22, or when the process at Step S28 is completed, the series of processes is temporarily terminated.

Here, the operation of the present embodiment will be described.
When the user sits in the driver's seat and turns on the power switch 60 while depressing the brake pedal 62, the CPU 52 determines whether or not the temperature Tbp of the battery pack 100 is equal to or less than a specified value TthL, and is equal to or less than the specified value TthL. In this case, the internal combustion engine 10 is started, and the assembled battery 42 is warmed up by the heat of the exhaust gas by the process described with reference to FIG. At this time, since the HV system is not activated, the vehicle is prohibited from traveling. When the temperature Tbp exceeds the specified value TthL, the HV system is activated. When the HV system is activated, the vehicle can travel according to the operation of the accelerator pedal 66 by the user.

  In this way, by warming up the assembled battery 42 using the heat of the exhaust, the assembled battery 42 can be warmed up regardless of the heat storage tank. In addition, when the temperature Tbp is equal to or lower than the specified value TthL, it is possible to suppress deterioration of the assembled battery 42 in order not to drive the vehicle.

According to the present embodiment described above, the following effects can be obtained.
(1) The refrigerant heat exchanged with the air sent into the vehicle compartment in the evaporator 76 is exchanged with the temperature adjusting liquid by the cooling heat exchange unit 86. In this case, it is sufficiently suppressed that the temperature of the refrigerant that exchanges heat with the air sent into the vehicle interior is increased due to the heat exchange with the temperature adjusting liquid. For this reason, it is possible to sufficiently secure the cold heat of the refrigerant that exchanges heat with the air sent to the vehicle interior while diverting the existing refrigerant passage of the air conditioner 70.

  (2) When the temperature of the assembled battery 42 is adjusted by exchanging heat between the assembled battery 42 and air using air as a medium, the air can sufficiently flow through the battery pack 100 on which the assembled battery 42 is mounted. Since the necessity arises, the battery pack 100 is enlarged. On the other hand, in the present embodiment, the adjustment heat exchange unit 80 is arranged in contact with the battery pack 100 so that the adjustment heat exchange unit 80 can exchange heat with the assembled battery 42 regardless of air. Thereby, it can suppress that the battery pack 100 enlarges.

<Second Embodiment>
Hereinafter, the second embodiment will be described with reference to the drawings with a focus on differences from the first embodiment.

FIG. 6 shows a drive system of the hybrid vehicle according to the present embodiment. In FIG. 6, members corresponding to those shown in FIG. 1 are denoted with the same reference numerals for convenience.
As shown in FIG. 6, in this embodiment, a parallel hybrid system is configured. As shown in FIG. 6, the crankshaft 11 of the internal combustion engine 10 is mechanically connected to the rotating shaft 33 of the motor generator 32 via the clutch C <b> 1, and the rotating shaft 33 is mechanically connected to the transmission 35. ing. The transmission 35 is mechanically coupled to the drive wheels 34 via the clutch C2.

Here, the vehicle start processing and its execution determination processing according to the present embodiment will be described.
FIG. 7 shows the procedure of the vehicle start process and its execution determination process according to the present embodiment. The processing shown in FIG. 7 is executed by the CPU 52 executing the program stored in the memory 54. This process is executed when a predetermined condition such as the power switch 60 being turned on with the brake pedal 62 depressed is satisfied. In the present embodiment, when the power switch 60 is turned on while the brake pedal 62 is depressed, a determination process for determining whether or not to warm up the assembled battery 42 according to the temperature Tbp or SMR 41 is performed. Do not execute the process of switching to the closed state.

  In the series of processes shown in FIG. 7, the CPU 52 first determines whether or not there is a vehicle start request (S40). Here, when the accelerator pedal 66 is depressed, it may be determined that there is a start request. When determining that there is a start request (S40: YES), the CPU 52 acquires the temperature Tbp of the battery pack 100 (S42). Then, the CPU 52 determines whether or not the temperature Tbp is equal to or less than a specified value TthL (S44). If the CPU 52 determines that the value exceeds the specified value TthL (S44: NO), the SMR 41 is closed to start the motor generator 32 in order to run the vehicle with the power of the motor generator 32 (S46). At this time, the clutch C2 is brought into the engaged state so that the power of the motor generator 32 can be applied to the drive wheels 34, and the clutch C1 is brought into the released state. On the other hand, when determining that the CPU 52 is equal to or less than the specified value TthL (S44: YES), the internal combustion engine 10 is started to keep the SMR 41 open while the vehicle is driven by the power of the internal combustion engine 10. (S48). At this time, both of the clutches C1 and C2 are engaged, and the power of the internal combustion engine 10 can be applied to the drive wheels 34. Then, the CPU 52 drives the circulation pump 90 and the exhaust heat supply pump 92 to bring the first passage side valve body V1 and the second passage side valve body V2 into the state described with reference to FIG. S50).

Note that the CPU 52 once ends the series of processes shown in FIG. 7 when the processes of steps S46 and S50 are completed or when a negative determination is made in the process of step S40.
Here, the operation of the present embodiment will be described.

  When the user depresses the accelerator pedal 66 and the CPU 52 determines that the start request has occurred, the CPU 52 determines whether or not the temperature Tbp is equal to or lower than the specified value TthL. EV traveling is realized by starting the vehicle with the generator 32. On the other hand, when the CPU 52 determines that the temperature Tbp is equal to or lower than the specified value TthL, the CPU 52 starts the vehicle by the internal combustion engine 10 and circulates the temperature adjusting liquid through the route shown in FIG. The battery pack 42 is warmed up. Thereby, the assembled battery 42 is warmed up and can be shifted to a state where EV traveling is possible at an early stage. Incidentally, when shifting to EV traveling, the CPU 52 stops the circulation pump 90 and the exhaust heat supply pump 92.

  Here, since the total weight of the cooling water in the exhaust heat supply passage 18 is smaller than the total weight of the cooling water circulating in the cylinder block and the cylinder head, the temperature of the cooling water in the exhaust heat supply passage 18 rises quickly. To do. For this reason, compared with the case where heat is exchanged between the cooling water circulating through the cylinder block and the cylinder head and the temperature adjusting liquid, the temperature difference between the temperature adjusting liquid in the heating heat exchanging portion 88 is increased early. As a result, the amount of heat received by the temperature adjusting liquid can be quickly increased.

<Correspondence>
The correspondence relationship between the items described in the column “Means for Solving the Problems” and the items in the above embodiment is shown below. In the following, the correspondence with the numbers described in “Means for Solving the Problems” is also shown. In the following, “CPU 52 that executes a predetermined process according to a program stored in memory 54” will be referred to as “CPU 52 that executes a predetermined process” in order to simplify the description.

  1. The rotating electrical machine corresponds to the motor generators 30 and 32 of FIG. 1 and the motor generator 32 of FIG. 6, and the switching unit is the first passage side valve body V1, the second passage side valve body V2 and the circulation pump shown in FIG. Corresponds to 90. Further, the first port of the adjustment heat exchange unit corresponds to the inlet IN, the second port corresponds to the outlet EX, and the first port of the heating heat exchange unit corresponds to the outlet EX, the second port. Corresponds to the entrance IN.

  2. The possible request acquisition processing unit corresponds to the CPU 52 that executes the process of step S22 in FIG. 5, and the temperature acquisition processing unit corresponds to the CPU 52 that executes the process of step S24. The prohibition processing unit corresponds to the CPU 52 that does not execute the process of step S28 when an affirmative determination is made in step S26, and the warm-up processing unit corresponds to the CPU 52 that executes the processes of steps S30 and S32.

  3. The configuration in which the internal combustion engine can “transmit power to the drive wheels while the rotating electric machine is stopped” corresponds to the drive system shown in FIG. The start request acquisition processing unit corresponds to the CPU 52 that executes the process of step S40 shown in FIG. 7, the temperature acquisition processing unit corresponds to the CPU 52 that executes the process of step S42, and the selective start processing unit The warm-up processing unit corresponds to the CPU 52 that executes the process of step S50, and corresponds to the CPU 52 that executes the process of S44 to S48.

4). This corresponds to the configuration described in FIG. In particular, the first port of the cooling heat exchange unit corresponds to the outlet EX, and the second port corresponds to the inlet IN.
5. This corresponds to the configuration described in FIG.

6). The cooling processing unit corresponds to the CPU 52 that executes the processing of FIG.
7). This corresponds to the configuration described in FIG.
<Other embodiments>
In addition, you may change at least 1 of each matter of the said embodiment as follows.

・ About possible request acquisition processing section
For example, instead of the process of step S22 of FIG. 5, when the power switch 60 is turned on regardless of the operation of the brake pedal 62, it may be determined that there is a request to enable the vehicle to travel. In addition, for example, it may be a process of determining that there is a request to be able to run when it is detected that a person is sitting in the driver's seat after the authentication process to the effect that the user is a regular user is completed.

Further, the request for enabling the vehicle to travel is not limited to the request for enabling travel by operating the accelerator pedal 66. For example, it may be a request that enables traveling by automatic driving.
・ About “Selective start processing part”
In the above embodiment, after the accelerator pedal 66 is depressed, the SMR 41 is closed when the temperature Tbp exceeds the specified value TthL. However, the present invention is not limited to this. For example, when the power switch 60 is turned on with the brake pedal 62 depressed, if the temperature Tbp exceeds a specified value TthL, the SMR 41 may be closed to prepare for the start of the vehicle. Further, for example, if the temperature Tbp exceeds a specified value TthL when the power switch 60 is turned on regardless of the brake operation, the SMR 41 may be closed to prepare for the start of the vehicle. However, in these cases, when the temperature Tbp is determined to be equal to or lower than the specified value TthL by the CPU 52, the SMR 41 is switched to the open state in step S48. Note that if a relay is provided between the motor generator 32 and the inverter 38 and the relay is kept open, the motor generator 32 does not change the SMR 41 in the open state in step S48 as the rotary shaft 33 rotates. A situation where unintended power generation is performed can be avoided.

The vehicle start request is not limited to the one corresponding to the operation of the accelerator pedal 66, and may be a vehicle start request by automatic driving, for example.
・ About the prohibition processing section and warm-up processing section
In the above embodiment, when the temperature Tbp is equal to or lower than the specified value TthL, the SMR 41 is maintained in the open state, but the present invention is not limited to this. For example, even when the SMR 41 is in the closed state, the control device 50 can also inhibit the vehicle from traveling by not starting the vehicle in response to the operation of the accelerator pedal 66.

  In the above embodiment, the process of starting the internal combustion engine 10 is performed without notifying the user when the temperature Tbp is equal to or lower than the specified value TthL, but the present invention is not limited to this. For example, when performing the process of starting the internal combustion engine 10, an announcement to that effect may be made. Further, for example, the user may be asked for permission to start the internal combustion engine 10 and execute the process of warming up the assembled battery 42. This can be realized by providing an operation member capable of inputting an intention display as to whether or not the user permits.

  In the said embodiment, although the upper limit (regulated value TthL) of the temperature from which the degree by which deterioration of the assembled battery 42 is accelerated | stimulated remove | deviates from an allowable range was illustrated to -20 degreeC, it is not restricted to this. For example, −30 ° C. may be set as the specified value TthL. The specified value TthL is not limited to the upper limit value of the temperature at which the deterioration of the assembled battery 42 is promoted. For example, it may be set based on the upper limit value of the temperature at which drivability falls outside the allowable range without outputting according to the operation of the accelerator pedal 66.

  As a drive system that is a precondition for executing the process of prohibiting vehicle travel and warming up the assembled battery 42 by exhaust heat when the temperature Tbp is equal to or less than a specified value TthL, the configuration illustrated in FIG. 1 is used. Not exclusively. For example, it may be a so-called series hybrid vehicle in which the internal combustion engine cannot apply power to the drive wheels. In this case, for example, a relay is provided between the generator and the inverter so that when the warm-up process is performed, the relay is opened. May not be possible. It is not limited to series hybrid vehicles. For example, a parallel hybrid vehicle such as that illustrated in FIG. 6 may be used. That is, in the configuration illustrated in FIG. 6, when the temperature Tbp is equal to or less than the specified value TthL, the warm-up process may be executed with the clutch C1 in the disconnected state.

・ About the heat exchanger for adjustment
The heat exchange with the battery pack 100 is not limited to air as a medium. For example, a fan that allows air to flow between the adjustment heat exchanging unit 80 and the battery pack 100 without facing each other and that faces each other and flows air from the adjustment heat exchanging unit 80 side to the battery pack 100 side is provided. May be.

・ About the heat exchanger for heating
In the above embodiment, a part of the exhaust heat supply passage 18 is accommodated in the heat exchange section for heating, which is a member that partitions the flow path of the temperature adjusting liquid, but the present invention is not limited to this. For example, a part of the exhaust heat supply passage 18 may contain a heating heat exchange part that is a member that causes the temperature adjustment liquid to flow. Further, for example, the heating heat exchanging part, which is a member through which the temperature adjusting liquid flows, and the exhaust heat supply passage 18 may be arranged adjacent to each other so as to be able to exchange heat.

  The liquid in the exhaust heat supply passage 18 is not limited to cooling water. Further, the heat exchange with the exhaust is not limited to the exhaust heat supply passage 18. For example, the heating heat exchanging section through which the temperature adjusting liquid flows may be arranged at the position of the exhaust heat recovery apparatus 16 shown in FIG. In this case, the exhaust heat supply passage 18 and the exhaust heat supply pump 92 may not be provided.

・ About the heat exchanger for cooling
In the above embodiment, a part of the connection passage 79 is accommodated in the cooling heat exchange part that is a member that partitions the temperature adjusting liquid flow path, but the present invention is not limited thereto. For example, a cooling heat exchange unit that is a member that causes the temperature adjustment liquid to flow may be accommodated in a part of the connection passage 79. Further, for example, the cooling heat exchange section and the connection passage 79 may be arranged adjacent to each other so as to be able to exchange heat.

  It is not restricted to what is arrange | positioned between the evaporator 76 and the compressor 72 which heat-exchange the air and refrigerant | coolant which are sent into the vehicle interior. For example, a dedicated passage that bypasses the evaporator 76 and connects the expansion valve 75 and the heat exchanger for cooling may be provided.

In addition, it is not essential that the apparatus for cooling the assembled battery 42 uses the first passage 82, the second passage 84, and the adjustment heat exchange unit 80 together with the heating heat exchange unit 88.
・ “Insulation between heat exchanger for cooling and heat exchanger for heating”
In the above embodiment, the cooling heat exchanging portion 86 and the heating heat exchanging portion 88 are spatially separated from each other and air is interposed therebetween, so that the cooling heat exchanging portion 86 and the heat exchanging portion are heated. Although heat conduction with part 88 was controlled, it is not restricted to this. For example, a heat shield layer made of a member having low thermal conductivity is disposed between the cooling heat exchange unit 86 and the heating heat exchange unit 88, and the cooling heat exchange unit 86 and the heating heat exchange unit 88 are arranged. You may suppress heat conduction.

・ "Flow direction of temperature control liquid"
In the above embodiment, the flow direction of the temperature adjustment liquid in the adjustment heat exchange unit is the same during warm-up and during cooling, but the present invention is not limited to this, and the flow direction may be reversed. That is, for example, when the motor built in the circulation pump 90 can rotate forward and backward, and in the case of cooling, the temperature adjusting liquid that has flowed out of the cooling heat exchanging portion 86 instead of the flow direction described in FIG. However, after flowing into the adjustment heat exchanging unit 80 via the second passage 84, it may flow out to the first passage 82. In this case, the inlet IN and the outlet EX of the adjustment heat exchange unit 80 are opposite to each other during cooling and warming up.

・ About the switching unit
The circulation pump 90 constituting the switching unit is not limited to the one provided in the first passage 82, and may be provided in the second passage 84, for example. Moreover, instead of providing both the first passage side valve body V1 and the second passage side valve body V2, the switching unit may include only one of them. For example, as described in the column “About the heat exchanger for cooling”, when the parts are not shared between the apparatus for cooling the assembled battery 42 and the apparatus for heating, the first passage-side valve body V1 and the second You may comprise only the circulation pump 90, without providing any of the channel | path side valve bodies V2.

・ About the vehicle
The series / parallel hybrid vehicle is not limited to that illustrated in FIG. For example, a speed reduction mechanism or the like may be provided between the ring gear of the power split mechanism 20 and the drive wheel 34. Further, whether the motor generators 30 and 32 and the internal combustion engine 10 are mechanically coupled to the sun gear S, the ring gear R, or the carrier C is not limited to that illustrated in FIG.

  Further, the parallel hybrid vehicle is not limited to the configuration illustrated in FIG. For example, the internal combustion engine 10 may be provided between the motor generator 32 and the transmission 35, and the motor generator 32 may be provided between the transmission 35 and the drive wheels 34, for example.

Further, as described in the column “Regarding prohibition processing unit and warm-up processing unit”, it may be a series hybrid vehicle.
・ "Battery"
The secondary battery is not limited to a lithium ion secondary battery, and may be a nickel hydrogen secondary battery, for example. Further, the fuel cell is not limited to the secondary battery. Even in this case, for example, in order to suppress freezing of the generated water during power generation under freezing, it is effective to warm up the fuel cell in the manner exemplified in the above embodiment.

・ About the control unit
In the above-described embodiment, the control device includes the CPU 52 and the memory 54 and performs the software processing of the processing in FIG. 4, the processing in FIG. 5, and the processing in FIG. 7, but is not limited thereto. For example, the processing of step S32 in FIG. 5 may be provided with an ASIC that executes at least a part of processing, such as processing with dedicated hardware (application-specific integrated circuit: ASIC).

  In the above embodiment, the control unit for controlling the control amount of the internal combustion engine 10, the control unit for controlling the control amount of the motor generators 30, 32, the control unit for operating the charger 44, and the first passage side valve body V1. The control unit that opens and closes the second passage side valve body V2 and the like is configured by one control device 50, but is not limited thereto. For example, a control device that realizes the processing of the above-described embodiment and their modifications by cooperation of several control units may be configured by allowing them to communicate with each other as separate control units.

·"others"
As temperature control of the assembled battery 42 by the control apparatus 50, it does not restrict to what was illustrated in the said embodiment and those modifications. For example, it may be a process of controlling the temperature of the assembled battery 42 to an appropriate range (for example, a temperature range within 5 ° C. around 40 ° C.) while the vehicle is running.

  By connecting the commercial power source 46 and the charger 44, the battery pack 42 is not limited to charging the battery pack 42 with electric power outside the vehicle, but may be one that charges the battery pack 42 by non-contact power feeding, for example.

  The compressor 72 is not limited to one using the auxiliary battery 56 as a power source, and may be one using the assembled battery 42 as a power source, for example.

  DESCRIPTION OF SYMBOLS 10 ... Internal combustion engine, 11 ... Crankshaft, 12 ... Exhaust passage, 14 ... Main muffler, 16 ... Exhaust heat recovery device, 18 ... Exhaust heat supply passage, 20 ... Power split mechanism, 30, 32 ... Motor generator, 33 ... Rotation Shaft, 34 ... Drive wheel, 35 ... Transmission, 36 ... Inverter, 38 ... Inverter, 40 ... DCDC converter, 41 ... SMR, 42 ... Battery pack, 44 ... Charger, 46 ... Commercial power supply, 50 ... Control device, 52 ... CPU, 54 ... Memory, 56 ... Auxiliary battery, 60 ... Power switch, 62 ... Brake pedal, 64 ... Brake sensor, 66 ... Accelerator pedal, 68 ... Accelerator sensor, 69 ... Temperature sensor, 70 ... Air conditioner, 72 ... Compressor 74 ... Condenser, 75 ... Expansion valve, 76 ... Evaporator, 78 ... Blower fan, 79 ... Connection passage, DESCRIPTION OF SYMBOLS 0 ... Heat exchange part for adjustment, 82 ... 1st channel | path, 84 ... 2nd channel | path, 86 ... Heat exchange part for cooling, 88 ... Heat exchange part for heating, 90 ... Circulation pump, 92 ... Waste heat supply pump, 100 ... Battery pack.

Claims (7)

In a hybrid vehicle comprising an internal combustion engine, a rotating electric machine capable of transmitting power to drive wheels, and a battery capable of supplying electric power to the rotating electric machine,
An adjustment heat exchange section that is filled with a temperature adjustment liquid, and exchanges heat between the temperature adjustment liquid and the battery that are filled;
A heating heat exchanging unit filled with the temperature adjusting liquid, and exchanging heat between the filled temperature adjusting liquid and the exhaust of the internal combustion engine;
A first port of a first port and a second port that are a pair of ports of the heat exchanger for adjustment and a first of a first port and a second port that are a pair of ports of the heat exchanger for heating. A first passage for connecting the port;
A second passage for connecting the second port of the adjustment heat exchange section and the second port of the heating heat exchange section;
A switching unit that switches whether the temperature adjustment liquid circulates or stops in a closed loop path formed by the heating heat exchange unit, the first passage, the adjustment heat exchange unit, and the second passage; A hybrid vehicle comprising A control device for controlling the temperature of the battery by operating the switching unit;
The controller is
A possible request acquisition processing unit for acquiring a request to enable the hybrid vehicle to travel;
A temperature acquisition processing unit for acquiring the temperature of the battery;
When the possible request acquisition processing unit acquires the request and the temperature of the battery is equal to or lower than a specified value, a prohibition processing unit that prohibits traveling of the hybrid vehicle;
When the possible request acquisition processing unit acquires the request and the temperature of the battery is equal to or lower than the specified value, the internal combustion engine is driven, and the switching unit is operated to A warm-up process for performing a warm-up process for heating the battery by circulating the temperature-adjusting liquid in a closed loop path formed by the first passage, the adjustment heat exchange unit, and the second passage. The hybrid vehicle according to claim 1, further comprising a processing unit. The internal combustion engine is capable of transmitting power to the drive wheels in a state where the rotating electrical machine is stopped,
A control device for controlling the temperature of the battery by operating the switching unit;
The controller is
A start request acquisition processing unit for acquiring a start request of the hybrid vehicle;
A temperature acquisition processing unit for acquiring the temperature of the battery;
When the start request acquisition processing unit acquires the start request and the battery temperature is equal to or lower than a specified value, the hybrid vehicle is started by the power of the internal combustion engine with the rotating electrical machine stopped, and the start When the request acquisition processing unit acquires the start request and the temperature of the battery exceeds the specified value, a selective start processing unit that starts the hybrid vehicle with the power of the rotating electrical machine,
When the start request acquisition processing unit acquires the start request and the temperature of the battery is equal to or lower than the specified value, the switching unit is operated, the heating heat exchange unit, the first passage, A warm-up processing unit that performs a warm-up process for heating the battery by circulating the temperature-adjusting liquid in a closed loop path formed by the adjustment heat exchange unit and the second passage. Item 2. The hybrid vehicle according to item 1. A cooling heat exchange section that is filled with the temperature adjustment liquid and that exchanges heat between the filled temperature adjustment liquid and the refrigerant of the air conditioner;
The first passage is a passage for connecting the first port of the adjustment heat exchange section and the first port of the pair of ports of the cooling heat exchange section and the first port of the second ports. But,
The second passage is also a passage for connecting the second port of the adjustment heat exchange section and the second port of the cooling heat exchange section,
The switching unit is
The first port of the heating heat exchange unit is communicated with the first passage and the first port of the cooling heat exchange unit is blocked from the first passage, or the heating heat exchange unit A first passage-side valve body that blocks whether the first port is cut off from the first passage and switches the first port of the heat exchanger for cooling to the first passage;
The second port of the heat exchanger for heating is communicated with the second passage and the second port of the heat exchanger for cooling is shut off from the second passage, or the heat exchanger of the heating is exchanged A second passage side valve body that blocks whether the second port is cut off from the second passage and the second port of the cooling heat exchange section communicates with the second passage; and at least one of the valve bodies ,
A circulation pump for circulating the temperature adjusting liquid in a closed loop path formed by the heating heat exchanging section or the cooling heat exchanging section, the first passage, the adjusting heat exchanging section, and the second passage; The hybrid vehicle according to any one of claims 1 to 3. The air conditioner includes a compressor and an evaporator that exchanges heat with air sent to the room of the hybrid vehicle.
The hybrid vehicle according to claim 4, wherein the cooling heat exchange section exchanges heat between the refrigerant flowing from the evaporator to the compressor and the temperature adjusting liquid. The battery is a secondary battery,
The air conditioner includes a compressor,
A control device for controlling the temperature of the battery by operating the switching unit;
When the battery is charged with electric power supplied from outside the hybrid vehicle and the battery temperature is equal to or higher than a threshold temperature, the control device drives the compressor and the at least one valve The temperature adjustment liquid in a closed loop path formed by the cooling heat exchange section, the first passage, the adjustment heat exchange section, and the second passage by operating a body and the circulation pump The hybrid vehicle according to claim 4, further comprising a cooling processing unit that circulates the battery to cool the battery.   The hybrid vehicle according to any one of claims 1 to 6, wherein the heat exchanger for adjustment is arranged so as to be able to exchange heat with the battery without using air as a medium.

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