KR101289059B1 - Cooling system of hybrid vehicle - Google Patents

Abstract

The present invention provides a cooling system for a hybrid vehicle. The cooling system of the present invention is a hybrid vehicle cooling system including a battery case having a battery compartment, a motor control unit for controlling an electric motor, and a DC / DC converter for converting a voltage of a battery. A blower for sucking indoor air of the vehicle; An introduction duct for introducing the sucked indoor air into the battery compartment to cool the battery in the battery compartment; A first supply duct for supplying air discharged from the battery compartment to the DC / DC converter side to cool the DC / DC converter; A second supply duct for supplying air discharged from the battery compartment to the motor controller to cool the motor controller; Air distribution means for distributing air discharged from the battery compartment to the first supply duct and the second supply duct.

Description

COOLING SYSTEM OF HYBRID VEHICLE}

1 is a perspective view showing a cooling system of a conventional hybrid vehicle,

2 is a front view showing a cooling system of a hybrid vehicle according to the present invention;

3 is a cross-sectional view showing in detail the configuration of a cooling system according to the present invention;

4 is a sectional view taken along the line IV-IV in Fig. 3,

5 is a cross-sectional view showing a second embodiment of the air distribution means constituting the cooling system of the present invention;

6 is a cross-sectional view taken along line VI-VI of FIG. 5;

7 is a perspective view of a guide baffle constituting the air distribution means of the second embodiment;

8 is a sectional view showing a third embodiment of the air distribution means constituting the cooling system of the present invention;

9 is a sectional view taken along line VII-VII of FIG. 8;

10 is a perspective view of a guide baffle and a dispersion baffle constituting the air distribution means of the third embodiment;

11 is a sectional view showing a modification of the guide baffle according to the third embodiment;

12 is a perspective view of a modification of the guide baffle according to the third embodiment.

DESCRIPTION OF REFERENCE NUMERALS

3: battery case 3a: battery compartment

8: battery 10: motor controller

12: DC / DC converter 20: Introduction duct

30: first supply duct 32: internal passage of the first supply duct

40: second supply duct 42: internal passage of the second supply duct

50: distribution door 54: first temperature sensing means

55: second temperature sensing means 56: controller

58: Actuator 60: Guide Baffle

70: dispersion baffle 80: discharge duct

90: blower

The present invention relates to a cooling system of a hybrid vehicle, and more particularly, to a cooling system of a hybrid vehicle capable of cooling both a battery, a motor controller, and a DC / DC converter by using introduced air.

The hybrid vehicle is an electric motor and an internal combustion engine that are used in parallel. The fuel consumption is very high, the vehicle maintenance cost is low, and the emission of the exhaust gas is very low.

Such a hybrid vehicle includes a battery for supplying electricity to an electric motor, a motor control unit for controlling the electric motor, a converter for appropriately converting a voltage of the battery, such as a DC / DC converter, and a battery. A cooling system for cooling is provided. In particular, the cooling system cools the battery, which emits high heat, thereby preventing the battery from overheating and extending its life.

As an example of a cooling system, there is an air cooling cooling system. As shown in FIG. 1, the air-cooled cooling system includes a suction duct 1 for sucking indoor air of a vehicle, an introduction duct 5 for introducing air from the suction duct 1 into the battery case 3. And a discharge duct 7 for discharging air passing through the battery case 3.

Such an air-cooled cooling system sucks indoor air of a vehicle and introduces it into the inside of the battery case 3 of the sucked room. Therefore, the air introduced into the battery case 3 makes it possible to cool the battery (not shown) stored in the battery case 3.

However, such a conventional cooling system has a disadvantage in that the battery controller only cools the motor controller and the DC / DC converter that generate high temperature heat, and because of this disadvantage, the motor controller and the DC / DC converter are cooled. There is a problem in that separate cooling devices to be installed.

In particular, since the motor controller and the cooling device for cooling the DC / DC converter must be separately installed, the number of parts increases, the structure of the system becomes complicated due to the increased number of parts, and the production cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a hybrid vehicle cooling system capable of cooling both a battery, a motor controller, and a DC / DC converter at one time with a single cooling structure. To provide. Another object of the present invention is to provide a cooling system of a hybrid vehicle which can minimize the number of parts, simplify the structure, and reduce the production cost.

In order to achieve the above object, the present invention provides a hybrid vehicle including a battery case having a battery compartment, a motor control unit for controlling an electric motor, and a DC / DC converter for converting a voltage of the battery. A blower for sucking indoor air of the vehicle; An introduction duct for introducing the sucked indoor air into the battery compartment to cool the battery of the battery compartment; A first supply duct for supplying air discharged from the battery compartment to the DC / DC converter to cool the DC / DC converter; A second supply duct for supplying air discharged from the battery compartment to the motor controller to cool the motor controller; And air distribution means for distributing air discharged from the battery compartment into the first supply duct and the second supply duct.

Best Mode for Carrying Out the Invention Preferred embodiments of a cooling system for a hybrid vehicle according to the present invention will be described in detail with reference to the accompanying drawings (the same components will be described with the same reference numerals).

2 is a front view showing a cooling system of a hybrid vehicle according to the present invention, Figure 3 is a cross-sectional view showing in detail the configuration of the cooling system according to the present invention.

First, before looking at the cooling system of the hybrid vehicle according to the present invention, a brief look at the hybrid vehicle.

As shown in FIGS. 2 and 3, the hybrid vehicle includes a battery case 3, and a battery storage chamber 3a is formed inside the battery case 3.

The battery 8 is housed in the battery compartment 3a, and the battery 8 housed in the battery compartment 3a is connected to an electric motor (not shown) to provide power.

The hybrid vehicle includes a motor controller 10 and a DC / DC converter 12. The motor controller 10 controls the electric motor, and the DC / DC converter 12 converts the voltage of the battery appropriately.

Next, look at in detail with respect to the cooling system of the hybrid vehicle according to the present invention.

2 and 3, the cooling system of the present invention includes an introduction duct 20 for sucking the indoor air of the vehicle and introducing it into the battery compartment 3a.

The introduction duct 20 includes an internal introduction passage 22, and the introduction passage 22 includes an inlet 24 and an outlet 25. The inlet 24 communicates with the interior of the vehicle, and the outlet 25 communicates with the battery compartment 3a of the battery case 3.

The introduction duct 20 sucks the indoor air of the vehicle and introduces the sucked indoor air into the battery storage chamber 3a. Therefore, the air introduced into the battery compartment 3a can cool the battery 8 housed in the battery compartment 3a.

3, the cooling system of the present invention includes a first supply duct 30 and a second supply duct 40 branched from the battery compartment 3a.

The first supply duct 30 is provided along the upper surface of the DC / DC converter 12 and includes an inner passage 32. The inner passage 32 introduces air that has passed through the battery compartment 3a and supplies the introduced air to the upper surface of the DC / DC converter 12.

The first supply duct 30 cools the DC / DC converter 12 by supplying air in the battery compartment 3a to the upper surface of the DC / DC converter 12.

On the other hand, a plurality of cooling fins 12a are formed on the upper surface of the DC / DC converter 12 extending toward the inner passage 32 of the first supply duct 30. (See FIG. 4).

The plurality of cooling fins 12a increase the contact area with air conveyed along the inner passage 32. Therefore, the cooling efficiency of the DC / DC converter 12 is increased. The plurality of cooling fins 12a are formed along the flow direction of the air so as not to disturb the flow of the air transported along the inner passage 32.

As shown in FIG. 3, the second supply duct 40 is installed along the lower surface of the motor controller 10 and includes an inner passage 42. The inner passage 42 introduces air passing through the battery compartment 3a and supplies the introduced air to the lower surface of the motor controller 10.

The second supply duct 40 cools the motor controller 10 by supplying air in the battery compartment 3a to the lower surface of the motor controller 10.

On the other hand, the second supply duct 40 is configured to branch from the first supply duct 30. Therefore, a part of the air flowing along the first supply duct 30 is bypassed, and the bypassed air is supplied to the lower surface of the motor controller 10.

Thus, the reason for branching the second supply duct 40 from the first supply duct 30 is that if each of the first and second supply ducts 30 and 40 is separately branched from the battery compartment 3a, the battery This is because the amount of air introduced into each duct may be different depending on the air flow deviation of the storage chamber 3a, and therefore, it is difficult to control the amount of air introduced into each duct.

On the other hand, if the second supply duct 40 is branched from the first supply duct 30, the air introduced into the first supply duct 30 is bypassed to the second supply duct 40, so that uniform air distribution Of course, it is possible to easily control the amount of air flowing into each duct by changing only the structure of the air distribution.

In some cases, it is also possible to connect the second supply duct 40 directly to the battery compartment 3a and to branch the first supply duct 30 from the second supply duct 40.

In addition, the second supply duct 40 is branched from the first supply duct 30, as shown in Figure 4, is branched from the central portion of the first supply duct 30, the width (L) of the first It is configured to be smaller than the width (L) of the one supply duct (30).

Referring again to FIG. 3, the cooling system of the present invention includes air distribution means for distributing air passing through the battery compartment 3a to the first supply duct 30 and the second supply duct 40. do.

The air distribution means includes a distribution door 50 rotatably installed at the branch point of the first supply duct 30 and the second supply duct 40.

The distribution door 50 is rotated between the inner passage 32 of the first supply duct 30 and the inner passage 42 of the second supply duct 40 while the first supply duct 30 and the second supply are rotated. The opening amount of the duct 40 is adjusted.

Since the distribution door 50 adjusts the opening amounts of the first and second supply ducts 30 and 40, the distribution door 50 variably adjusts the amount of air introduced into the first supply duct 30 and the second supply duct 40. . Therefore, the air flowing into the first supply duct 30 and the second supply duct 40 is appropriately distributed.

Again, referring to FIG. 3, the air distribution means may adjust the air distribution amounts of the first and second supply ducts 30 and 40 according to the degree of overheating of the DC / DC converter 12 and the motor controller 10. Dispensing door control means for controlling the dispensing door 50 to be provided.

The distribution door control means includes a first temperature sensing means 54 for sensing the temperature of the DC / DC converter 12, a second temperature sensing means 55 for sensing the temperature of the motor controller 10, A controller 56 for outputting a control signal in accordance with the detection signals of the first and second temperature sensing means 54, 55, and an actuator 58 for rotating the distribution door 50 in accordance with the control signal of the controller 56. It is provided.

The first temperature sensing means 54 is composed of a temperature sensor and senses the temperature of the DC / DC converter 12. The second temperature sensing means 55 is composed of a temperature sensor and senses the temperature of the motor controller 10.

The controller 56 is equipped with a microprocessor and compares the temperature of the DC / DC converter 12 input from the first temperature sensing means 54 with a preset temperature, and, as a result of the comparison, the DC / DC converter 12. If the temperature is higher, the DC / DC converter 12 determines that it is overheated and outputs a "first control signal".

The controller 56 compares the temperature of the motor controller 10 inputted from the second temperature sensing means 55 with a preset temperature. If the temperature of the motor controller 10 is higher as a result of the comparison, the motor controller ( It is determined that 10) is overheated and outputs a "second control signal".

The actuator 58 rotates the distribution door 50 in the direction of the second supply duct 40 according to the "first control signal" output from the controller 56. In particular, it rotates in the direction of reducing the opening amount of the second supply duct 40.

Therefore, the amount of air introduced into the second supply duct 40 is reduced, and the amount of air introduced into the first supply duct 30 is increased. Accordingly, a large amount of air is introduced into the first supply duct 30 to overheat. The centralized DC / DC converter 12 can be cooled intensively.

The actuator 58 then rotates the distribution door 50 in the direction of the first supply duct 30 in accordance with the "second control signal" output from the controller 56. In particular, it rotates in the direction of reducing the opening amount of the first supply duct 30.

Therefore, the amount of air introduced into the first supply duct 30 is reduced, and the amount of air introduced into the second supply duct 40 is increased. Accordingly, a large amount of air is introduced into the second supply duct 40 to overheat. The centralized motor controller 10 can be cooled intensively.

According to the distribution door control means of this configuration, since the DC / DC converter 12 and the motor controller 10 detects the overheating degree, and increases the amount of air supply where the overheating is detected, the DC / DC converter 12 And the motor controller 10 can be efficiently cooled.

Next, FIGS. 5 to 7 are views showing a second embodiment of the air distribution means.

The air distribution means of the second embodiment includes a guide baffle 60 extending from the bottom surface of the inner passage 32 of the first supply duct 30 toward the inner passage 42 of the second supply duct 40. .

The guide baffle 60 is a triangular protrusion, and guides air flowing along the first supply duct 30 to the inner passage 42 of the second supply duct 40.

The guide baffle 60 guides the air of the first supply duct 30 to the second supply duct 40, thereby bypassing the air flowing along the first supply duct 30 to the second supply duct 40. do. Therefore, a large amount of air is distributed to the second supply duct 40 to efficiently cool the lower surface of the motor controller 10.

On the other hand, the guide baffle 60 is formed integrally with the first supply duct 30 or separately manufactured and then mounted to the first supply duct 30. Preferably, the first supply duct 30 is molded in one piece.

In addition, the guide baffle 60 is formed at a position corresponding to the second supply duct 40, as shown in FIG. Therefore, it has a length corresponding to the width l of the second supply duct 40.

Next, FIGS. 8 to 10 are views showing a third embodiment of the air distribution means.

The air distribution means of the third embodiment includes a guide baffle 60 for guiding the air of the first supply duct 30 to the second supply duct 40 similarly to the air distribution means of the second embodiment described above.

The guide baffle 60 protrudes corresponding to the inner passage 42 of the second supply duct 40, and an end thereof extends toward the inner passage 42 of the second supply duct 40.

The guide baffle 60 bypasses air flowing along the first supply duct 30 to the second supply duct 40. Thus, a large amount of air can be distributed to the second supply duct 40.

On the other hand, at the upper end of the guide baffle 60, the air passage groove 62 is formed in a predetermined width. The air passage groove 62 allows the air flowing along the first supply duct 30 to flow to the DC / DC converter 12.

Therefore, air can also be supplied to the cooling fins 12a of the DC / DC converter 12 arranged at the rear of the guide baffle 60, whereby the cooling fins 12a of the DC / DC converter 12 Allow it to cool down evenly throughout.

On the other hand, the guide baffle 60 of the other portions except for the air passage groove 62 has a very high height and extends into the inner passage 42 of the second supply duct 40. Thus, it is configured to bypass a large amount of air to the second supply duct 40. This is to compensate for this, since the amount of air bypassed to the second supply duct 40 is reduced because of the air passage groove 62.

8 to 10, the air distribution means of the third embodiment further includes a dispersion baffle 70 formed on both sides of the guide baffle 60.

The dispersion baffle 70 extends from both sides of the guide baffle 60 to both inner walls 32a of the inner passage 32 of the first supply duct 30. In particular, it extends to the part corresponding to both edges of the DC / DC converter 12 long.

The dispersion baffle 70 has a height lower than that of the guide baffle 60. In particular, as shown in Figure 8, it has a low key height to form a wide distance (t) with the ceiling surface 32b of the inner passage 32 of the first supply duct (30).

The dispersion baffle 70 serves to firstly block air flowing along the first supply duct 30 to be dispersed in the width direction. Thus, the air of the first supply duct 30 can be distributed with a uniform flow rate and a uniform pressure distribution, and the uniformly distributed air uniformly cools the cooling fins 12a of the DC / DC converter 12. To allow cooling.

In addition, since the dispersion baffle 70 extends to portions corresponding to both edges of the DC / DC converter 12, air in the first supply duct 30 is concentrated at both edges of the DC / DC converter 12. Prevent it. Therefore, the air of the first supply duct 30 is prevented from being discharged into the empty space between the cooling fins 12a at both edges and the inner wall 32a of the first supply duct 30.

According to the air distribution means of the third embodiment, since the air of the first supply duct 30 is dispersed in the width direction, the air of the first supply duct 30 is uniformly distributed over the entire inner passage 32. Can be distributed. Therefore, the cooling fins 12a of the DC / DC converter 12 can be cooled uniformly.

In addition, since the air can be supplied to the cooling fins 12a arranged at the rear of the guide baffle 60, the cooling efficiency of the DC / DC converter 12 may be maximized.

The present inventors, in order to test the cooling efficiency of the DC / DC converter 12 and the motor controller 10 according to the air distribution means of the third embodiment, as shown in Table 1 below, the motor controller 10, DC The distribution ratio of the air volume distributed to each of the cooling fin 12a of the / DC converter 12, and the both edges of the cooling fin 12a was tested.

[Table 1] [Comparison of Air Flow Rate]

division Air volume distribution rate (%) Motor controller 34.7% DC / DC converter Cooling fins 30.8% edge 34.5%

As a result of the test, the air volume distributed to the motor controller 10 is about 34.7% based on the entire air of the first supply duct 30, and the air volume distributed to the cooling fins 12a of the DC / DC converter 12 is zero. It was found that about 30.8% of the total air of the first supply duct 30 and the air volume distributed to the edge of the cooling fin 12a was about 34.5% of the total air of the first supply duct 30.

As a result, the air distribution means of the third embodiment is configured to supply air from the first supply duct 30 to the motor controller 10, the cooling fins 12a of the DC / DC converter 12, and the cooling fins 12a. It appeared to distribute evenly on each edge. Therefore, the cooling efficiency of the motor controller 10 and the DC / DC converter 12 has been shown to be improved.

11 and 12 are views illustrating a modification of the guide baffle 60 according to the third embodiment.

In the guide baffle 60 of the modification, either one of the portions 60a and 60b of the air passage groove 62 has the same height as the dispersion baffle 70. The other configuration is the same as the guide baffle 60 of the third embodiment described above.

The guide baffle 60 of this modified example has one key portion 60a having the same height as that of the dispersion baffle 70, so that one portion 60a has a lower key height than the other portion 60b. Therefore, the amount of air bypassed from the first supply duct 30 to the second supply duct 40 can be reduced.

In addition, since the height of the one side 60a is low, a large amount of air can be supplied to the cooling fins 12a of the DC / DC converter 12 arranged behind the guide baffle 60. Therefore, the cooling efficiency of the DC / DC converter 12 can be increased.

Referring again to FIG. 3, the cooling system of the present invention has a discharge duct 80 connected to the first supply duct 30 and the second supply duct 40.

The discharge duct 80 communicates with the internal passages 32 and 42 of the first and second supply ducts 30 and 40, and discharges air flowing along the first and second supply ducts 30 and 40. Drain to the outside. In particular, air cooled by the DC / DC converter 12 and the motor controller 10 is discharged to the outside of the vehicle.

And the cooling system of the present invention has a blower 90 is installed in the discharge duct (80). The blower 90 sucks air from the discharge duct 80 while operating by the applied power. Therefore, the introduction duct 20 connected to the discharge duct 80 allows the indoor air of the vehicle to be sucked in.

Although the blower 90 is described as being installed in the discharge duct 80 in the present invention, it may be installed in the introduction duct 20 in some cases.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

As described above, according to the cooling system of the hybrid vehicle according to the present invention, since the structure of the cooling of both the battery, the motor controller and the DC / DC converter at the same time with the introduced air, a separate cooling device for cooling the respective devices You do not need. Therefore, the number of parts can be minimized, the structure can be simplified, and the production cost can be reduced.

In addition, since the air cooled by the battery is uniformly distributed to the motor controller side and the DC / DC converter side, the cooling efficiency of the motor controller and the DC / DC converter can be increased.

In addition, the amount of air allocated to the motor controller side and the DC / DC converter side can be adjusted according to the degree of overheating of the motor controller and the DC / DC converter, thereby maximizing the cooling efficiency of the DC / DC converter and the motor controller.

In addition, since the air supplied to the DC / DC converter side has a uniform flow rate and a uniform pressure distribution, the DC / DC converter can be efficiently cooled.

Claims (15)

delete delete A hybrid vehicle cooling system including a battery case 3 having a battery compartment 3a, a motor control unit 10 for controlling an electric motor, and a converter 12 for converting a voltage of the battery. To A blower (90) for sucking indoor air of the vehicle, an introduction duct (20) for introducing the sucked indoor air into the battery compartment (3a) to cool the battery (8) of the battery compartment (3a), The first supply duct 30 for cooling the converter 12 by supplying air discharged from the battery compartment 3a to the converter 12 side, and the air discharged from the battery compartment 3a. The second supply duct 40 and the second supply duct 40 for cooling the motor controller 10 to supply to the motor controller 10 side, and the air discharged from the battery compartment 3a, the first supply duct 30 and the second supply Air distribution means for distributing to the duct 40, the air distribution means, The first and second supply duct 30 is distributed to the first and second supply ducts 30 and 40 while rotating between the inner passage 32 of the first supply duct 30 and the inner passage 42 of the second supply duct 40. Distribution door 50 for varying the amount of air, and Distribution door control to control the distribution door 50 to adjust the air distribution amount of the first and second supply ducts 30 and 40 according to the degree of overheating of the converter 12 and the motor controller 10. Further comprising means; The distribution door control means, First temperature sensing means (54) for sensing the temperature of the converter (12); Second temperature sensing means (55) for sensing the temperature of the motor controller (10); When the input temperature is higher by comparing the temperature input by the first temperature sensing means 54 with a preset temperature, the converter 12 determines that the converter is overheated, outputs a first control signal, and outputs the second temperature. A controller 56 for comparing the temperature input by the sensing means 55 with a preset temperature and outputting a second control signal when it is determined that the motor controller 10 is overheated; When the first control signal is output from the controller 56, the distribution door 50 is rotated in a direction of decreasing the opening amount of the second supply duct 40 to distribute the air to the first supply duct 30. , And when the second control signal is output, the distribution door 50 is rotated in a direction of decreasing the opening amount of the first supply duct 30 to reduce the air distribution amount to the second supply duct 40. Cooling system of a hybrid vehicle, characterized in that it comprises an increasing actuator (58). A hybrid vehicle cooling system including a battery case 3 having a battery compartment 3a, a motor control unit 10 for controlling an electric motor, and a converter 12 for converting a voltage of the battery. To A blower (90) for sucking indoor air of the vehicle, an introduction duct (20) for introducing the sucked indoor air into the battery compartment (3a) to cool the battery (8) of the battery compartment (3a), The first supply duct 30 for cooling the converter 12 by supplying air discharged from the battery compartment 3a to the converter 12 side, and the air discharged from the battery compartment 3a. The second supply duct 40 and the second supply duct 40 for cooling the motor controller 10 to supply to the motor controller 10 side, and the air discharged from the battery compartment 3a, the first supply duct 30 and the second supply Air distribution means for distributing to the duct 40, the air distribution means, The second supply duct 40 from the inner passage 32 of the first supply duct 30 to guide a part of the air introduced into the first supply duct 30 to the second supply duct 40. Cooling system of a hybrid vehicle, characterized in that it comprises a guide baffle (60) extending toward the inner passage (42) of. 5. The method of claim 4, Dispersion baffles 70 extending from the guide baffle 60 to both inner walls 32a of the first supply duct 30 so as to disperse the air flowing along the first supply duct 30 in the width direction. Cooling system of a hybrid vehicle further comprising. 6. The method of claim 5, The dispersion baffle 70, Cooling system of a hybrid vehicle, characterized in that formed with a lower height than the guide baffle (60). 5. The method of claim 4, The guide baffle (60), the cooling system of the hybrid vehicle, characterized in that extending into the inner passage (42) of the second supply duct (40). 5. The method of claim 4, The guide baffle (60) is characterized in that it has an air passage groove (62) for allowing the air of the first supply duct to pass to the converter (12) side. 6. The method of claim 5, The guide baffle (60) and the dispersion baffle (70) are integrally molded to the first supply duct (30), characterized in that the hybrid vehicle cooling system. 6. The method of claim 5, The guide baffle (60) and the dispersion baffle (70) are separately manufactured and mounted on the first supply duct (30). The method according to claim 3 or 4, And a plurality of cooling fins (12a) extending from the converter (12) toward the inner passage (32) of the first supply duct (30). 12. The method of claim 11, The first supply duct (30), the cooling system of the hybrid vehicle, characterized in that for supplying air in the battery compartment (3a) to the surface provided with a cooling fin (12a) of the converter (12). The method according to claim 3 or 4, The motor controller 10 has a lower side portion exposed to the inside of the second supply duct 40, and the second supply duct 40 has a lower portion of the motor controller 10 exposed toward the inside. Cooling system of a hybrid vehicle, characterized in that for supplying air in the battery compartment (3a) to the side portion. The method according to claim 3 or 4, The first supply duct 30 is directly connected to the battery compartment 3a, and the second supply duct 40 is branched from the first supply duct 30, characterized in that the cooling system of the hybrid vehicle. . The method according to claim 3 or 4, The second supply duct 40 is directly connected to the battery compartment 3a, and the first supply duct 30 is branched from the second supply duct 40, characterized in that the cooling system of the hybrid vehicle. .

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