JP3168907B2 - Hybrid electric vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid electric vehicle that runs by driving an electric motor using electric power generated by a generator having a prime mover or electric power stored in a battery.

[0002]

2. Description of the Related Art In recent years, there has been a demand for the practical use of, for example, a hybrid electric vehicle which suppresses the generation of exhaust gas due to the problem of the global environment. Application to trucks is desired. This hybrid electric vehicle has a motor and a generator,
A battery, an electric motor, etc. are installed, and the electric power stored in the battery or the electric power generated by the generator when the prime mover is driven is selectively used, and the electric motor is driven by this electric power, and the electric motor is driven. The vehicle is driven by rotating drive wheels that are drivingly connected to the output shaft.

FIG. 7 is a graph showing a change in a battery charging rate with respect to a traveling distance for explaining a traveling mode in a general hybrid electric vehicle. As shown in the graph of FIG. 7, before the electric vehicle starts running, the battery is charged with a charger or the like in advance, so that the battery charging rate is 100%. In this state, the electric motor is driven by the electric power stored in the battery, and the electric vehicle starts traveling in the battery traveling mode. Then, as the traveling distance increases, the battery charging rate decreases. When the battery charging rate decreases, for example, to 50%, the mode is switched to the hybrid traveling mode in which the engine traveling mode and the battery traveling mode are alternately switched. In this hybrid driving mode, first, the engine driving mode is set,
The prime mover is driven to start power generation by the generator. When the power generation is started in this way, the generated power is supplied to the electric motor of the electric vehicle and stored in the battery. Then, when the battery charge rate rises to 55%, the vehicle enters the battery running mode, in which the driving of the prime mover is stopped to stop the power generation by the generator, and the electric vehicle is driven again only by the battery power to drive the electric vehicle. After that, the engine traveling mode and the battery traveling mode are alternately switched. If the prime mover is a gasoline engine, the electric vehicle continues running by refueling on the way. Further, by setting the charging rate of the battery to 100% using a charger or the like, quiet continuous traveling in the battery traveling mode without driving the prime mover becomes possible.

As described above, by storing electric power in a battery in advance by a charger or the like and setting the charging rate to 100%, the electric vehicle can be driven quietly by driving the electric motor by the electric power of the battery without driving the prime mover. Is possible, while
When the battery charge rate drops to a predetermined value, the electric motor can be driven by driving the prime mover to store the electric power generated by the generator in the battery and driving the electric motor. In this case, if the prime mover is a gasoline engine, by driving this engine at a constant speed,
Good exhaust gas characteristics.

In the above-described hybrid electric vehicle, the battery generates heat while the battery is being charged or when the electric motor is driven by the power stored in the battery. Batteries are generally hot,
The performance is significantly reduced, and the service life is also reduced. Therefore, when the temperature of the battery becomes high, the battery is cooled by the outside air.
-169981.

A battery cooling device for an electric vehicle disclosed in Japanese Patent Application Laid-Open No. 5-169981 connects a hollow side frame extending in the front and rear directions of a vehicle body to front and rear of a battery housing chamber in which a battery is housed. By connecting the intake duct and exhaust duct before and after, the outside air sucked from the front end opening of the intake duct is led to the battery storage chamber through the side frame to cool the battery, and the cooled air is passed through the exhaust duct to the rear end. To discharge from the opening.

[0007]

In the above-described conventional battery cooling device for an electric vehicle, the battery is cooled by introducing outside air into the battery accommodating chamber, thereby suppressing a rise in temperature due to heat generation of the battery. In addition, performance and life are prevented from being reduced. By the way, the performance of a battery generally changes depending on its temperature environment, so that temperature management is an important issue. In this case, as a factor of the decrease in the battery performance, in addition to the above-described temperature increase due to the heat generation of the battery, a battery extremely low temperature state in winter can be considered. In a battery cooling device of a conventional electric vehicle,
Although the temperature rise of the battery can be suppressed, there is no countermeasure against the cryogenic temperature of the battery, and it is not possible to suppress the decrease in performance, and there is a problem that the driving force of the vehicle becomes insufficient.

SUMMARY OF THE INVENTION The present invention solves such a problem, and a hybrid which heats or cools against a change in the temperature environment of the battery to suppress a decrease in the performance of the battery and stabilizes the battery performance. It is intended to provide an electric vehicle.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, a hybrid electric vehicle according to the present invention has a hybrid electric vehicle having an engine running mode in which the engine is driven and a battery running mode in which the vehicle is driven by battery power. In the car, behind the engine
A battery storage chamber for storing the battery,
A first inlet formed in front of the battery housing to take in air around the engine and a side of the battery housing;
The formed air intake passage communicating with the said <br/> battery housing chamber has a second inlet capturing outside air, and the air Kido said first inlet provided in the inlet passage to the the opening of the two inlet and the inlet switching means preparative switchable air, the battery
Battery temperature detecting means for detecting the temperature of the second air inlet , and when the battery temperature detected by the battery temperature detecting means is equal to or lower than a first predetermined value, the air inlet switching means causes the air inlet switching means to open the second inlet with respect to the opening degree. (1) A control means for increasing the degree of opening of the intake.

Therefore, when the vehicle runs in the engine running mode or the battery running mode, when the battery is extremely low temperature, that is, when the battery temperature detected by the battery temperature detecting means is equal to or lower than the first predetermined value. The opening degree of the front first intake side is increased by the air intake switching means.
The air volume of the air around the engine that is introduced into the rear battery storage chamber increases, so that the battery at a very low temperature is warmed up and a decrease in performance is suppressed.

[0011]

Embodiments of the present invention will be described below.

The hybrid electric vehicle of the present invention is equipped with an engine, a generator, and a battery. The hybrid electric vehicle can run by driving the engine (engine running mode) and can run by battery power (battery running mode). It has become. This hybrid electric vehicle has a temperature sensor as a battery temperature detecting means for detecting the temperature of the battery, a first inlet for taking in air around the engine is formed at a front end, and a second inlet for taking in air outside the vehicle. An air intake passage formed with is provided,
The rear end of the air intake passage communicates with a battery storage chamber in which a battery is stored. The air intake passage is provided with a switching damper as air intake switching means, for example, capable of selectively switching between a first intake and a second intake. The control unit as control means receives the battery temperature detected by the temperature sensor,
In addition, the switching damper is operable, and when the battery temperature is equal to or less than a first predetermined value,
Switching to the first intake is performed by a switching damper.

Therefore, when the vehicle is running in the engine running mode or the battery running mode, the battery may be charged at an extremely low temperature when the battery is initially charged or when it is cold.
That is, when the battery temperature detected by the temperature sensor is equal to or lower than the first predetermined value, the first damping is performed by the switching damper.
By switching to the intake, the opening of the first intake with respect to the opening of the second intake is increased, and the amount of warm air around the engine introduced from the first intake through the air intake passage into the battery housing chamber. Is increased, the battery at a very low temperature is warmed up, and a decrease in running performance is suppressed.

[0014] In the hybrid electric vehicle according to the present invention, the control unit may be configured to control the battery temperature to the first level.
When the value is equal to or less than a predetermined value, the mode is forcibly switched to the engine running mode.

Therefore, when the battery is at a very low temperature in the battery running mode, the mode is forcibly switched to the engine running mode, and the temperature of the surrounding air rises due to the operation of the engine. Is introduced into the battery accommodating chamber, and the warming-up of the battery is efficiently promoted to suppress a decrease in running performance.

Further, in the hybrid electric vehicle according to the present invention, a ventilation fan for ventilating the inside of the battery compartment is provided in the battery storage room, and the control unit operates by the switching damper when the battery temperature is equal to or lower than the first predetermined value. The opening of the first intake with respect to the opening of the second intake is increased, and the ventilation fan is operated.

Therefore, when the battery is at a very low temperature,
The opening degree of the first intake side is increased by the switching damper, and the ventilation fan is operated, so that the amount of warm air around the engine that is introduced from the first intake into the battery storage chamber through the air intake passage is increased. As a result, the warm-up of the battery is efficiently promoted.

Further, in the hybrid electric vehicle according to the present invention, when the battery temperature is high, that is, when the battery temperature is equal to or higher than a second predetermined value higher than the first predetermined value, the opening degree of the first inlet is controlled by the switching damper. So that the degree of opening of the second intake port is increased.

Therefore, when the battery is charged for a long time, the battery generates heat and becomes high in temperature. Therefore, when the battery temperature detected by the temperature sensor is equal to or higher than the second predetermined value, the switching damper causes the second intake side. Is increased, and the amount of cold air outside the vehicle that is introduced from the second intake into the battery storage chamber through the air intake passage increases, so that the high-temperature battery is cooled and the battery is prevented from being deteriorated. Battery performance can be stably obtained.

Further, in the hybrid electric vehicle according to the present invention, a ventilation fan for ventilating the inside of the battery storage room is provided, and the control unit is operated by the switching damper when the battery temperature is equal to or higher than the second predetermined value. The degree of opening of the second intake with respect to the degree of opening of the inlet increases, and the ventilation fan is operated.

Therefore, when the temperature of the battery is high, the opening degree of the second intake side is increased by the switching damper and the ventilation fan is operated, so that the battery accommodating chamber passes from the second intake through the air intake passage. As a result, the amount of cold air outside the vehicle introduced into the vehicle increases, so that the cooling of the battery is efficiently promoted and the durability of the battery is improved.

In the hybrid electric vehicle according to the present invention, a battery storage chamber is provided behind the engine.
The first intake is formed in front of the battery storage chamber, and the second intake is formed on the side of the battery storage chamber.

Therefore, when switching to the first intake is performed by the switching damper, air around the engine is introduced into the battery accommodation chamber through the air intake passage from the first intake formed in front of the battery accommodation chamber. On the other hand, when switching to the first intake is performed by the switching damper, air outside the vehicle is introduced into the battery accommodation chamber through the air intake passage from the second intake formed on the side of the battery accommodation chamber. Cold air can be effectively introduced into the battery storage chamber.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a control configuration of a hybrid electric vehicle according to one embodiment of the present invention, FIG. 2 is a flowchart showing a flow of battery temperature control by the hybrid electric vehicle of this embodiment, and FIG. 3 is a hybrid electric vehicle of this embodiment. FIG. 4 shows a side view of the battery box and its storage portion of the present embodiment, FIG. 5 shows a plan view of the battery box, and FIG. 6 shows a rear view of the battery box.

In the truck as a hybrid electric vehicle of the present embodiment, as shown in FIG. 3, an engine 13 as a prime mover mounted on a chassis frame 12 of a vehicle 11 uses an internal combustion engine (LPG or methanol) using gasoline as fuel. This engine 1 may be an engine.)
The generator 14 is drivingly connected to the output shaft 3. The engine 13 and the generator 14 constitute a power generation system of a hybrid electric vehicle. The generator 14 is electrically connected to a battery 15 for storing generated power and a motor 16 as an electric motor. And this motor 1
A drive wheel 17 is connected to the output shaft 6.

In this embodiment, a large number of batteries 15
Can be accommodated in the battery box 18, and the battery box 18 is mounted on the chassis frame 12 along the front-rear direction and formed between the left and right vertical joists 20 supporting the packing box 19. The battery box 18 is slidable by a slide mechanism 22 so that the battery box 18 can be pulled out to the rear of the vehicle. Further, the battery box 18 accommodating the large number of batteries 15 is provided with a charging connector 23 which is connected to each battery 15 so as to be chargeable and which can be connected to a charging facility (not shown) outside the vehicle.

Accordingly, power is supplied from the generator 14 to the battery 15 with respect to the battery 15 having a reduced charging rate, and the battery 15 can be charged. When the battery 15 is removed from the vehicle body together with the battery box 18, a connector (not shown) from the charging equipment is connected to the battery box 1.
The charging equipment 23 is connected to a charging connector 23, and power is supplied from the charging equipment to the battery 15 via the charging connector 23 to enable charging.

Here, the slide mechanism 22 of the battery box 18 will be described. As shown in FIGS. 3 and 4, a pair of right and left vertical joists 20 are mounted on both sides of the chassis frame 12 forming a frame shape so as to extend in the front-rear direction. The vertical joist 20 is disposed so that its cross section has a U-shape and its openings face each other, and is fixed to the chassis frame 12 by a number of fixing bolts 31. First rails 32 each having a horizontal support surface are fixed to inner surfaces of the pair of right and left vertical joists 20 facing each other, and a first roller 33 is provided at a rear end in the longitudinal direction (right end in FIG. 4). Are respectively attached by brackets 34.

On the other hand, the battery box 18 capable of accommodating a large number of batteries 15 is formed in a box shape with an open top, and the battery box 1 facing the inner surfaces of a pair of left and right vertical joists 20.
8 have a second rail 3 having a horizontal support surface
5 are fixed, and the front end in the longitudinal direction (FIG. 4)
The second roller 36 is attached to the bracket 3
7 attached.

Accordingly, each of the second rollers 36 of the battery box 18 can freely roll on the first rail 32 of the left and right vertical joists 20, and each of the second rails 35 can be rotated by the vertical joists 20.
The battery box 18 is movably supported on the first roller 33. The battery box 18 is moved in the longitudinal direction of the vertical joist 20 by the slide mechanism 22 including the rails 32, 35 and the rollers 33, 36, that is, in the vehicle longitudinal direction. It is free to move along.

The first rail 32 of the vertical joist 20 has a step 32a formed at the front end, while the battery box 1
The second rail 35 of No. 8 has a step 35a formed at the rear end. As described above, the battery box storage portion 21 is formed above the chassis frame 12 by the left and right vertical joists 20, and the battery box storage portion 21 is open to the rear of the vehicle.

Accordingly, when the battery box 18 is moved forward by the slide mechanism 22 to the front end of the battery box storage section 21, the first
The second roller 36 of the battery box 18 rolling on the rail 32 falls off the step 32a, and the second rail 35 of the battery box 18 moving on the first roller 33 of the vertical joist 20 is moved by the step 35a. take off. At this time, since the lower surface of the second rail 35 of the battery box 18 is in close contact with the upper surface of the first rail 32 of the vertical joist 20, the battery box 18 is restrained by the vertical joist 20 due to mutual frictional resistance. Thus, a large number of batteries 15
Is securely positioned and stored in the battery box storage portion 21 by the frictional resistance generated by the total weight of the large number of batteries 15 due to the second rail 35 being in close contact with the first rail 32. be able to.

On the other hand, when the battery box 18 is stored in the battery box storage section 21, the second roller 36 of the battery box 18 is moved from the step 32a to the vertical joist 20.
After pulling up on the first rail 32 and pulling up the second rail 35 from the step 35a onto the first roller 33, the battery box 18 is moved to the rear of the vehicle by the slide mechanism 22, and The battery box 18 can be taken out of the vehicle by pulling it out of the rear opening toward the rear of the vehicle. In this manner, the battery box 18 containing the large number of batteries 15 can be easily pulled out from the rear of the vehicle through the rear opening of the battery box storage section 21 by the slide mechanism 22 and taken out of the vehicle. be able to.

Here, the internal structure of the battery box 18 will be described. As shown in FIGS. 5 and 6,
The battery box 18 includes four rows of batteries 15 arranged in a row in the front-rear direction. The front and rear adjacent batteries 15 are connected to each other by a connection plate 41, and are covered by an insulating cover 42. At the rear end of the battery box 18, the batteries 15 arranged side by side are connected to each other by a connection cable 43, and an insulating cover 44 is attached to a connection portion of the battery 15. On the other hand, at the front end of the battery box 18, batteries 15 arranged side by side are connected to each other by a connection cable 45, and the battery 15 is connected to the charging connector 23 via a switchboard 46. Power supply connectors 47 and 48 that can be connected to the motor 16 and the generator 14 when mounted on the vehicle body are connected.

In the battery box 18, a temperature sensor 49 is provided as a battery temperature detecting means for detecting the temperature of the battery 15. This temperature sensor 49
Are arranged between the batteries 15 arranged side by side on the left and right, and a plurality of are provided at predetermined positions in the battery box 18.
Each temperature sensor 49 is connected to a connection connector 51 by a connection cable 50. Further, a pair of ventilation fans 53 and a duct 54 rotatable by a pair of electric motors 52 are mounted at the rear of the battery box 18.

In the hybrid electric vehicle of this embodiment, when the temperature of the battery 15 is extremely low,
Warm air around the engine is taken into the battery box 18 to warm up the battery 15. If the temperature of the battery 15 is high, cool air outside the vehicle is taken into the battery box 18 to cool the battery 15. Like that.

That is, as shown in FIG. 1, both sides of the front surface of the battery box
Warm air intake (first intake) 61 that takes in the air around it
Are formed, and a guide plate 62 is attached. A cold air intake (second intake) 63 for taking in outside air is formed on both sides of the front end of the battery box 18, and a guide plate 64 is attached to the cold air intake. The warm air inlet 61 and the cool air inlet 63 are connected to the battery housing chamber 1 in which the battery 15 is housed by the air inlet passage 65.
8a. The air intake passage 65 is provided with a switching damper 66 as air intake switching means capable of selectively switching between the warm air intake 61 and the cold air intake 63, and is rotatably provided. I can do it. On the other hand, on both sides of the rear surface of the battery box 18, outlets 68 for discharging the warm air or cool air taken in opposing to the respective fans 53 are formed.

A battery control unit 69 as control means is connected to each of the temperature sensors 49, and receives the battery temperature detected by the temperature sensors 49. Further, the battery control unit 69 is connected to a drive motor 67 of the switching damper 66, drives the driving motor 67 based on the input battery temperature, rotates the switching damper 66, and rotates the warm air inlet 61 and the cold air inlet 6.
3 is selectively switched. In this case, when the battery temperature detected by the temperature sensor 49 is equal to or lower than a first predetermined value, the switching damper 66 is turned to the cold air inlet 63 side and closed, and the warm air inlet 61 is opened. Air intake passage 6
Communicate with 5. On the other hand, when the battery temperature is equal to or higher than the second predetermined value, the switching damper 66 is rotated to the warm air intake 61 side and closed, and the cool air intake 63 is opened to communicate with the air intake passage 65. I do. In this embodiment, the battery 1
In order to secure a stable performance of 5, the first predetermined value is set to about 1
5 ° C. and the second predetermined value are set to about 40 ° C., but are not limited to these values.

The battery control unit 69
Is connected to an electric motor 52 of a ventilation fan 53, and drives the electric motor 52 when the battery temperature is equal to or lower than a first predetermined value or equal to or higher than a second predetermined value. Then, the fan 53 is operated. Further, an engine control unit 69 is connected to the battery control unit 69. When the battery temperature is equal to or lower than a first predetermined value, the engine 13 is forcibly started, and the battery temperature is equal to or higher than the first predetermined value. , The forced start of the engine 13 is released.

Hereinafter, the battery temperature control will be described with reference to the flowchart of FIG. As shown in FIG. 2, when the vehicle is traveling in the engine traveling mode or the battery traveling mode, the temperature sensor 49 always detects the temperature of the battery 15. At this time, in step S1, the temperature of the battery 15 is set to the second predetermined value of 40 ° C.
It is determined whether or not this is the case. When the temperature of the battery 15 is extremely low, the process proceeds to step S2. In this step S2, it is determined whether or not the temperature of the battery 15 is equal to or lower than the first predetermined value of 15 ° C. As described above, since the temperature of the battery 15 is extremely low, the process proceeds to step S3.

In this step S3, the battery control unit 69
When the engine 13 is not started, the engine 13 is forcibly started. Then, step S4
Then, the switching damper 66 is switched to open the warm air intake 61 to communicate with the air intake passage 65, and the electric motor 52 is driven to operate the fan 53. Then, Figure 1
As shown in (1), warm air around the engine (black arrow) is introduced from the warm air intake 61 through the air intake passage 65 into the battery storage chamber 18a. Therefore, the extremely low temperature battery 15 is warmed up, and a decrease in running performance is suppressed.

When the temperature of the battery 15 rises and becomes higher than 15 ° C. when the vehicle is running in the engine running mode or the battery running mode with the battery 15 warmed up, steps S2 to S6 are performed. Move to In step S6, a command is issued to the engine control unit 69 to cancel the forced start of the engine 13, and
In step S7, the driving of the electric motor 52 is stopped, and the operation of the fan 53 is stopped.

Then, while the vehicle is running, the battery 1
5 is continuously performed, this battery 15
Generates heat and the temperature rises. Then, when the temperature of the battery 15 becomes equal to or higher than the second predetermined value of 40 ° C. in step S1, the process proceeds to step S8. This step S8
Then, the switching damper 66 is switched to open the cold air intake 63 to communicate with the air intake passage 65, and the electric motor 52 is driven to operate the fan 53. Then, Figure 1
Cold air outside the vehicle as shown in the figure (open arrow)
Is introduced from the cold air intake 63 through the air intake passage 65 into the battery storage chamber 18a. Therefore, the high-temperature battery 15 is cooled, and the temperature of the battery storage chamber 18a is made uniform, so that the charging and power supply efficiency of each battery 15 is improved, and the battery damage is reduced and the life is extended.

Then, when the battery 15 is cooled and the temperature of the battery 15 becomes lower than 40 ° C. in step S1, the process proceeds to steps S2, S6 and S7, and the electric motor 5
Then, the operation of the fan 53 is stopped.

As described above, in the hybrid electric vehicle of the present embodiment, when the battery 15 is in a very low temperature state, warm air around the engine is taken in to warm up the battery 15, while in a high temperature state, the external electric power is supplied to the outside. The cool air is taken in to cool the battery 15, and the battery 15
Can be maintained at an appropriate temperature to exhibit stable performance, and the power performance of the vehicle can be stabilized.

In the above-described embodiment, the warm air intake 61 and the cool air intake 63 are selectively switched. However, the ratio of the degree of opening between the warm air intake 61 and the cool air intake 63 is changed. By controlling, the temperature of the battery 15 may be kept at an appropriate temperature. Further, the above-described embodiment has been described by taking an example in which the hybrid electric vehicle of the present invention is applied to a series hybrid electric vehicle in which a motor is driven by electric power obtained by driving a generator by an engine in an engine running mode. However, the same effect can be obtained even when applied to a parallel hybrid electric vehicle in which wheels are directly driven by the engine output in the engine running mode.

[0048]

As described above, the contract is made as described with reference to the embodiment.
According to the hybrid electric vehicle of the invention of Motomeko 1, en
A battery storage room for storing the battery is located behind the gin.
An air intake passage having a first intake for taking in air around the engine in front of the battery storage chamber and a second intake for taking in outside air outside the vehicle storage chamber and communicating with the battery storage chamber; And air inlet switching means for switching the degree of opening between the first inlet and the second inlet, and the battery temperature detecting means detects by the control means.
When the battery temperature is equal to or lower than the first predetermined value, the opening degree of the first intake with respect to the opening degree of the second intake is increased by the air intake switching means. The warm air around the engine that is introduced from the first inlet through the air intake passage into the battery housing is effective.
As a result, the flow rate of the warm air increases, and the battery performance can be suppressed and the battery performance can be stabilized by warming the extremely low temperature battery.

Further, according to the hybrid electric vehicle of the second aspect of the present invention, it is possible to ventilate the battery chamber.
A fan is provided, and the control means controls the opening of the first intake with respect to the opening of the second intake when the battery temperature is equal to or lower than the first predetermined value .
Increase the opening, activate the ventilation fan, and
One, forcibly switched Runode to the engine traveling mode, ET
The surrounding air whose temperature has risen due to the operation of the engine
Is introduced into the battery chamber through the air intake passage,
The flow rate of the warm air is increased, and the warming-up of the battery can be efficiently promoted to suppress a decrease in running performance.

[0050]

According to the third aspect of the present invention, when the battery temperature is equal to or higher than the second predetermined value higher than the first predetermined value, the opening degree of the second intake is increased by the switching damper. As a result, when the battery becomes hot due to continuous charging and becomes hot, the amount of cold air outside the vehicle that is introduced from the second inlet into the battery housing chamber through the air intake passage increases, thereby increasing the temperature of the hot battery. , And the battery performance can be stably obtained by preventing the battery from deteriorating.

Further, according to the hybrid electric vehicle of the invention of claim 4, the ventilation fan to ventilate the battery housing chamber is provided, the second inlet by the switching damper when the battery temperature is equal to or more than the second predetermined value Since the opening degree is increased and the ventilation fan is operated, the amount of cold air outside the vehicle introduced from the second intake into the battery storage chamber through the air intake passage is increased, and the cooling of the battery is increased. And the durability of the battery can be improved.

[0053]

[Brief description of the drawings]

FIG. 1 is a control configuration diagram of a hybrid electric vehicle according to one embodiment of the present invention.

FIG. 2 is a flowchart illustrating a flow of battery temperature control by the hybrid electric vehicle according to the embodiment.

FIG. 3 is a schematic configuration diagram of a truck as a hybrid electric vehicle of the present embodiment.

FIG. 4 is a side view of the battery box of the present embodiment and a storage section thereof.

FIG. 5 is a plan view of a battery box.

FIG. 6 is a rear view of the battery box.

FIG. 7 is a graph illustrating a change in a battery charging rate with respect to a traveling distance for explaining a traveling mode in a general hybrid electric vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vehicle 13 Engine 14 Generator 15 Battery 16 Electric motor 18 Battery box 18a Battery storage room 21 Battery box storage part 22 Slide mechanism 49 Temperature sensor (battery temperature detection means) 52 Electric motor 53 Ventilation fan 61 Warm air intake (first intake) Inlet) 63 Cold air intake (second intake) 65 Air intake passage 66 Switching damper (air intake switching means) 69 Battery control unit (control means) 70 Engine control unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-200908 (JP, A) JP-A-3-155064 (JP, A) JP-A-7-73906 (JP, A) 73424 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60L 1/00-3/12 B60K 1/04 B60K 6/02 B60L 7/00-13/00 F02G 5/00 -5/04

Claims (4)

(57) [Claims] 1. A hybrid electric vehicle having an engine running mode in which an engine is driven and a battery running mode in which the vehicle runs on electric power from a battery, the hybrid electric vehicle being disposed behind the engine and receiving the battery.
A battery storage chamber to be accommodated, and in front of the battery storage chamber
An air intake passage having a first intake formed to take in air around the engine and a second intake formed at a side of the battery housing to take in air outside the vehicle and communicating with the battery housing; Air inlet switching means provided in the air inlet passage for switching an opening degree between the first inlet and the second inlet; and a battery for detecting a temperature of the battery.
Re-temperature detecting means, and when the battery temperature detected by the battery temperature detecting means is equal to or lower than a first predetermined value, the air inlet switching means opens the first inlet with respect to the opening degree of the second inlet. A hybrid electric vehicle comprising control means for increasing power. 2. The hybrid electric vehicle according to claim 1, wherein the ventilation chamber ventilates the battery chamber.
An air inlet switching means when the battery temperature is equal to or lower than a first predetermined value.
The first inlet with respect to the opening of the second inlet
And the ventilation fan is turned on.
And a forcible switching to the engine running mode. 3. The hybrid electric vehicle according to claim 1, wherein the control unit is configured to control the first intake by the air intake switching unit when the battery temperature is equal to or higher than a second predetermined value higher than a first predetermined value. A hybrid electric vehicle, wherein the opening degree of the second intake with respect to the opening degree of the entrance is increased. 4. The hybrid electric vehicle according to claim 4, further comprising a ventilating fan for ventilating the inside of the battery housing, wherein the control unit is configured to control the controller when the battery temperature is equal to or higher than a second predetermined value. A hybrid electric vehicle, wherein an opening degree of the second intake with respect to an opening degree of the first intake is increased by an air intake switching means, and the ventilation fan is operated.