KR101501544B1 - Hybrid vehicle and method for controlling temperature of secondary battery thereof - Google Patents

Abstract

Disclosed are a hybrid vehicle and a method for adjusting a temperature of secondary battery thereof. The hybrid vehicle comprises: an engine which receives mixed gas of fossil fuel and air and generates power by combusting the mixed gas; a gas purifying unit which purifies exhaust gas which is generated by combusting the mixed gas by the engine; a secondary battery which receives electricity to be charged or discharges the charged electricity; a motor which receives the electricity from the secondary battery and generates power; a secondary battery temperature adjusting unit which supplies the exhaust gas discharged from the gas purifying unit to the outside of the secondary battery; and an ECU which controls the temperature adjusting unit according to a temperature of the secondary battery to adjust the temperature of the secondary battery.

Description

HYBRID VEHICLE AND METHOD FOR CONTROLLING TEMPERATURE OF SECONDARY BATTERY THEREOF BACKGROUND OF THE INVENTION [0001]

The present invention relates to a hybrid vehicle and a method for controlling the temperature of the secondary battery. More particularly, the present invention relates to a hybrid vehicle capable of operating a secondary battery at an appropriate temperature using waste heat of exhaust gas generated in an engine of a hybrid vehicle, .

Hybrid vehicle refers to a vehicle driven by two or more different power sources. Generally, a hybrid vehicle includes an internal combustion engine that burns fossil fuel to obtain power and a motor driven by electric power stored in a secondary battery such as a lithium ion (Li-Ion) battery or a lithium polymer (Li-Polymer) It is used as a power source. Such a hybrid vehicle is significantly attracting attention as a next-generation automobile because it can significantly reduce fuel consumption and harmful gas emissions compared to conventional automobiles.

However, the charging and discharging performance of the secondary battery is drastically lowered at a low temperature (for example, 0 DEG C or lower). In particular, considering the characteristics of an automobile which must operate in various environments according to the needs of the user, degradation of the performance of the secondary battery at a low temperature has been a factor for lowering the reliability of the hybrid vehicle. In recent years, research is underway to apply a hybrid system to military vehicles. Since military vehicles are likely to be used in a more harsh environment than general automobiles for their purposes, degradation of secondary batteries at low temperatures can be a very serious problem by limiting operational performance.

In this case, the heat generated by the discharge of the secondary battery is utilized, or the secondary battery is heated by using a separate heat-insulating material or a heating means. However, unnecessary power consumption occurs when the secondary battery is discharged, Separate heat-insulating materials and heating means require additional costs and complicate the construction of the hybrid vehicle, which increases the manufacturing cost.

An object of the present invention is to provide a hybrid vehicle capable of controlling the temperature of a secondary battery by using waste heat of exhaust gas generated from an internal combustion engine.

It is another object of the present invention to provide a method for controlling the temperature of a secondary battery of a hybrid vehicle.

According to an aspect of the present invention, there is provided a hybrid vehicle including: an engine that receives a mixed gas of fossil fuel and air and burns the mixed gas to generate power; A gas purifier for purifying an exhaust gas generated by combustion of the mixed gas in the engine; A secondary battery charged with electric power or discharging charged electric power; A motor that receives power from the secondary battery and generates power; A secondary battery temperature regulator for supplying the exhaust gas discharged from the gas purifier to the outside of the secondary battery; And an ECU for controlling the temperature of the secondary battery by controlling the temperature controller according to the temperature of the secondary battery.

The secondary battery temperature regulating unit senses the temperature of the secondary battery and transmits a temperature signal to the ECU. A secondary battery case disposed inside the secondary battery and configured to allow the exhaust gas to flow around the secondary battery; A first gas discharge pipe for discharging the exhaust gas supplied from the gas purifier to the outside; A second gas discharge pipe for supplying the exhaust gas supplied from the gas purifier to the secondary battery case; And a control unit for controlling the first gas discharge pipe and the second gas discharge pipe so as to control the flow of the exhaust gas supplied from the gas purifying unit to one of the first gas discharge pipe and the second gas discharge pipe according to a control signal applied from the ECU And a second gas discharge valve; And a control unit.

The secondary battery case is implemented as a double case structure, and the secondary battery is disposed therein. Both ends of the secondary battery case are connected to the second gas discharge pipe so that the exhaust gas flows through the double structure.

The ECU turns on the first and second gas discharge valves so that the exhaust gas is discharged to the outside through the secondary battery case when the temperature sensed by the temperature sensor is lower than a predetermined first reference temperature, And the first and second gas discharge valves are turned off so that the exhaust gas is immediately discharged to the outside without passing through the secondary battery case when the temperature is higher than the predetermined second reference temperature by a temperature higher than the first reference temperature .

The secondary battery case is configured such that the exhaust gas flows to the upper end of the secondary battery so that condensation does not occur in the secondary battery case.

The secondary battery temperature controller may further include a water discharging unit for discharging the accumulated liquid to the outside when condensation is generated in the inside of the secondary battery case and the liquid is accumulated.

The water discharge means includes a water discharge pipe connected to a lower end of the secondary battery case; A water level sensor disposed in the water discharge pipe to detect whether condensation of water occurs in the water discharge pipe; And a water discharge valve for controlling the discharge of the liquid through the water discharge pipe in response to the detection signal of the water level detection sensor; And a control unit.

According to an aspect of the present invention, there is provided a method for controlling a temperature of a secondary battery of a hybrid vehicle, the method comprising the steps of: injecting a mixed gas of fossil fuel and air to generate a power by burning the mixed gas; A secondary battery, a motor for generating power by receiving power from the secondary battery, a gas purifier for purifying the exhaust gas generated by burning the mixed gas in the engine, a secondary battery case formed to surround the secondary battery, A secondary battery temperature control method of a hybrid vehicle including a secondary battery temperature regulator having first and second gas discharge pipes and an ECU, the method comprising the steps of: determining, by a temperature sensor included in the secondary battery temperature regulator, Sensing a temperature of the secondary battery; Allowing the exhaust gas purified by the gas purifying unit to flow through the secondary battery case when the temperature of the secondary battery is lower than a predetermined first reference temperature; Discharging the exhaust gas to the outside without passing through the secondary battery case when the temperature is higher than a predetermined second reference temperature by a temperature higher than the first reference temperature; .

Wherein the step of allowing the exhaust gas to flow through the secondary battery case includes the step of discharging the exhaust gas to the outside through the secondary battery case without flowing the exhaust gas to the first gas discharge pipe for discharging the exhaust gas to the outside, And the first and second gas discharge valves are turned on so that the exhaust gas flows to the second gas discharge pipe connected to both ends of the secondary battery case.

Wherein the step of allowing the secondary cell to flow through the secondary cell case flows the upper end of the secondary cell inside the secondary cell case having the double case structure so that moisture condensation does not occur in the secondary cell case. do.

Wherein the step of discharging the gas to the outside exerts the function of turning on the first and second gas discharge valves so that the exhaust gas is discharged to the outside through the first gas discharge pipe.

In the method for regulating the temperature of the secondary battery, when the secondary battery temperature control unit is condensed in the secondary battery case to accumulate the liquid, the liquid level of the accumulated liquid is sensed and the liquid is discharged through the water discharge pipe connected to the lower end of the secondary battery case To the outside of the apparatus.

Wherein the step of discharging the liquid to the outside includes the steps of: detecting a water level of the water discharge pipe; When the detection signal is generated from the water level sensor, turning on the water discharge valve disposed in the water discharge pipe to discharge the liquid to the outside through the water discharge pipe; And a control unit.

Therefore, the hybrid vehicle of the present invention and the secondary battery temperature control method of the present invention can supply the exhaust gas waste heat to the secondary battery at a high temperature generated from the internal combustion engine among the two power sources provided in the hybrid vehicle, The hybrid vehicle can be operated normally even in a harsh environment of the hybrid vehicle, and the efficiency and operation safety of the hybrid vehicle can be improved. Therefore, even if the hybrid vehicle is used for military purposes where it must be operated in a harsh environment, it can perform its mission normally. Further, since a separate heat generating device for raising the temperature of the secondary battery is not required, the hybrid vehicle can be simplified and the manufacturing cost can be reduced.

1 shows a schematic structure of a hybrid vehicle according to an embodiment of the present invention.
2 shows an example of a secondary battery temperature regulator of a hybrid vehicle according to the present invention in detail.
Fig. 3 shows another example of the secondary cell temperature control unit.
4 illustrates a method of controlling the temperature of a secondary battery of a hybrid vehicle according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. However, the present invention can be implemented in various different forms, and is not limited to the embodiments described. In order to clearly describe the present invention, parts that are not related to the description are omitted, and the same reference numerals in the drawings denote the same members.

Throughout the specification, when an element is referred to as "including" an element, it does not exclude other elements unless specifically stated to the contrary. The terms "part", "unit", "module", "block", and the like described in the specification mean units for processing at least one function or operation, And a combination of software.

1 shows a schematic structure of a hybrid vehicle according to an embodiment of the present invention.

The hybrid vehicle shown in FIG. 1 includes a driving unit 100 and an ECU 200.

The driving unit 100 generates power to drive the hybrid vehicle. The hybrid vehicle includes at least two types of power sources in the driving unit 100. An ECU (Electronic Control Unit) 200 includes a plurality of sensors (not shown) including a temperature sensor as a control unit of the hybrid vehicle to detect the internal state of the hybrid vehicle including the driving unit 100, Thereby performing control.

1, the driving unit includes an engine 110, a motor 120, a clutch 130, a driving shaft 140, a gas purifier 150, and a secondary battery 160.

The engine 110 and the motor 120 are each a power source of a hybrid vehicle. When the driving conditions are set in advance, the engine 110 and the motor 120 are driven individually or simultaneously according to the set conditions to generate driving power of the hybrid vehicle.

The engine 110 is a kind of internal combustion engine. The engine 110 is supplied with a mixture of fossil fuel and air, compresses the supplied gas using a piston in the engine 110, Generate power. In the hybrid vehicle, the engine 110 may directly generate power for driving the hybrid vehicle, but in some cases, it may be used to generate electric power in the case where the power of the secondary battery 160 is insufficient.

As the engine 110 generates power by using the explosive force generated when the fossil fuel is burned, a high-temperature gas is generated in the engine 110, and the generated gas is used as exhaust gas As shown in FIG. The exhaust gas generated at this time differs depending on the type of fossil fuel used in the engine, but it is a gas at a temperature of about 500 degrees or more. Conventionally, automobiles including an engine are used for heating the temperature inside the automobile, such as a heater, such as a heater, but the heat of the exhaust gas is mostly discharged as waste heat or cooled for safety.

The motor 120 is another power source of the hybrid vehicle, and is driven by receiving power from the secondary battery 160. The motor 120 drives the hybrid vehicle using the electric power supplied from the secondary battery 160 when the hybrid vehicle requires power and generates electric power when the hybrid vehicle does not need the electric power to drive the secondary battery 160 It can also be charged.

The clutch 130 is provided to transmit the power generated by the engine 110 and the motor 120 to the drive shaft 140. The hybrid clutch 130 is configured to transmit power generated by the engine 110 to the engine 110 in accordance with the running state of the hybrid vehicle. Only the power can be transmitted to the drive shaft 140 or only the power generated from the motor 120 can be transmitted to the drive shaft 140. [ The power generated by both the engine 110 and the motor 120 may be transmitted to the drive shaft 140 in some cases.

The drive shaft 140 is a mechanical device that receives the power generated by the engine 110 and the motor 120, which are two power sources, through the clutch 130 and rotates the wheels of the hybrid vehicle. The drive shaft 140 is mechanically connected to the clutch 130 and the wheels of the hybrid vehicle and uses the power generated by the engine 110 and the motor 120 to rotate the wheels of the hybrid vehicle to physically drive the hybrid vehicle . The driving shaft 140 may further include a gear structure so as to adjust the rotation ratio of the wheels with respect to the power generated by the engine 110 and the motor 120.

In this case, the clutch 130 may be omitted according to the design structure of the hybrid vehicle. In this case, the engine 110 and the motor 120 may be directly connected to the drive shaft 140.

The gas purifying unit 150 is provided to purify the exhaust gas generated in the engine 110. The exhaust gas generated by burning the fossil fuel in the engine 110 is regarded as a main cause of air pollution and is subject to various regulations. Exhaust gas contains hydrocarbons (HC), carbon monoxide (CO), nitrogen compounds (NOx), and sulfur dioxide. Exhaust gas must be purified and discharged as it has adverse effects on human body as well as air pollution. The gas purifying unit 150 filters various chemicals contained in the exhaust gas, including various catalysts, and discharges the exhaust gas. In the present invention, automobiles having an engine including a hybrid vehicle exhaust exhaust gas purified by the gas purifier 150, but the purified exhaust gas can be also applied to the secondary battery 160.

The secondary battery 160 may be a lithium ion battery, a lithium polymer battery or the like as a battery. The secondary battery 160 supplies power to the motor 120 under the control of the ECU 50, or charges the battery.

However, as described above, in the hybrid vehicle of FIG. 1, the charge / discharge performance of the secondary battery 160 deteriorates when the temperature is low (for example, 0 degrees or less). This results in a reduced reliability of the hybrid vehicle and is a hindrance to the use of the hybrid vehicle for military purposes, which must be driven with high reliability, especially in harsh environments.

In the present invention, as shown in FIG. 2, the temperature of the secondary battery 160 can be controlled by using the exhaust gas discharged from the engine 110 of the hybrid vehicle.

Although not shown in FIG. 1, the hybrid vehicle includes a gas purifier 150 and a secondary battery 160 (not shown) to reduce the gas noise generated in the engine 110 and to lower the temperature of the exhaust gas discharged from the gas purifier 150 Or a silencer may be further provided at a stage subsequent to the secondary battery 160. [

2 shows an example of a secondary battery temperature regulator of a hybrid vehicle according to the present invention in detail.

In FIG. 2, a part of the hybrid vehicle of FIG. 1 is shown, and in particular, the discharge structure of the exhaust gas is shown in detail as a secondary battery temperature regulator 170. Referring to FIG. 2, the secondary battery temperature regulator 170 of the hybrid vehicle according to the present invention includes two gas discharge valves V1 and V2, two gas discharge pipes PP1 and PP2, a secondary battery case CS, And a temperature sensing sensor (TS).

The first gas discharge pipe PP1 of the two gas discharge pipes PP1 and PP2 is a pipe for discharging the exhaust gas gs to the outside and the second gas discharge pipe PP2 is a pipe for discharging the exhaust gas gs to the outside To a secondary battery case (CS) surrounding the battery.

The temperature sensor TS is attached to the secondary battery 160 to sense the temperature of the secondary battery 160 and transmit the sensed temperature to the ECU 200.

The two gas discharge valves V1 and V2 may be implemented as a three-way valve. The first and second gas discharge valves V1 and V2 are turned on or off in response to a control signal output from the ECU 200 in accordance with the temperature sensed by the temperature sensor TS to generate a flow of the exhaust gas gs And is turned on when the temperature of the secondary battery 160 is lower than a predetermined first reference temperature REF1 (for example, 0 DEG C), and when the temperature of the secondary battery 160 reaches a predetermined second reference temperature REF2 ) (For example, 10 DEG C).

When the first gas discharge valve V1 is turned off, the exhaust gas gs purified and discharged from the gas purifying unit 150 is supplied to the first gas discharge pipe PP1. When the first gas discharge valve V1 is turned on, Is supplied to the second discharge pipe (PP2). The second gas discharge valve V2 discharges the exhaust gas gs of the first gas discharge pipe PP1 to the outside when the second gas discharge valve V2 is turned off and the exhaust gas gs of the second gas discharge pipe PP2, To the outside.

On the other hand, the secondary battery case CS is configured as a double case enclosing the outside of the secondary battery 160, and both ends are connected to the second gas discharge pipe PP2 so that the exhaust gas gs can flow around the secondary battery .

That is, the temperature regulator 170 does not discharge the exhaust gas gs discharged from the gas purifying unit 150 to the outside, but the two gas discharge valves V1 and V2 and the two gas discharge pipes PP1, PP2 and the secondary battery case CS to allow the exhaust gas gs to flow around the secondary battery 160 according to the temperature of the secondary battery. Accordingly, the temperature of the secondary battery 160 can be increased by the heat of the exhaust gas gs by conduction and radiation heat by the heat exchange method. Even if the exhaust gas gs is purified through the gas purifier 150, it contains much higher heat than the outside of the hybrid vehicle. Therefore, the temperature of the secondary battery 160 can be raised by using the exhaust gas gs discharged from the hybrid vehicle.

However, even if the temperature of the secondary battery 160 is too high, the safety of the secondary battery 160 may be deteriorated. In a state where the secondary battery 160 is normally operating, the secondary battery 160 may be unnecessarily used, It is not preferable to further increase the temperature. Therefore, when the temperature of the secondary battery 160 is higher than the second reference value, the waste gas is prevented from flowing to the secondary battery 160, thereby preventing the secondary battery 160 from being heated.

Here, the secondary battery case CS is preferably configured such that the flow of the exhaust gas gs can flow in the upper direction of the secondary battery as shown in FIG. 2 so that condensation does not occur in the case.

In some cases, a metal demister is further provided at the outlet of the gas purifying unit 150 to generate a differential pressure in the exhaust gas gs flowing through the first and second gas discharge pipes PP1 and PP2 So that moisture can be removed.

Fig. 3 shows another example of the secondary cell temperature control unit.

The configuration of the secondary battery temperature regulator 170 shown in FIG. 3 is basically the same as that of the secondary battery temperature regulator shown in FIG. 3, the water discharge pipe is connected to the lower end of the secondary battery case CS, and the water discharge valve V3 and the water level sensor WS are provided in the water discharge pipe.

Even if the exhaust gas gs flows in the upper direction of the secondary battery and the metal demister is provided at the outlet of the gas-liquid separator 30 so that condensation of water does not occur inside the secondary battery case CS as described above, Moisture may be contained in the waste gas, and condensation may be caused thereby to accumulate the liquid in the secondary cell case CS or the second gas discharge pipe PP2. In this case, the structure shown in Fig. 2 can not discharge the accumulated liquid, which is a problem.

3, the secondary battery temperature regulator 270 senses whether the liquid is accumulated in the water discharge pipe connected to the lower end of the secondary battery case CS by using the water level sensor WS, and the water discharge valve V3 ) Operates in accordance with whether or not the liquid level detection sensor WS detects liquid. That is, when the level sensor WS senses the liquid, the water discharge valve V3 is turned on to discharge the liquid accumulated in the secondary battery case CS.

The three valves V1 to V3 may be set to be automatically turned on or off according to the sensed values of the temperature sensor TS and the water level sensor WS. However, in the power converter 50, And the water level sensor WS to control the three valves V1 to V3. In addition, the hybrid vehicle may have a separate control unit (not shown), and the control unit may control the three valves V1 to V3 by receiving the sensed values of the temperature sensor TS and the water level sensor WS .

4 illustrates a method of controlling the temperature of a secondary battery of a hybrid vehicle according to an embodiment of the present invention.

4, when the hybrid vehicle is driven, the temperature sensor TS attached to the secondary battery 160 is connected to the secondary battery 160, (S10). Then, it is determined whether the sensed temperature is lower than a predetermined first reference temperature REF1 (S20). If the sensed temperature is lower than the first reference temperature REF1, the hybrid vehicle turns on the first and second gas discharge valves V1 and V2 so that the exhaust gas gs flows into the second gas discharge pipe PP2 and the secondary battery case CS, and then opens the path to the second gas discharge pipe PP2 so as to be discharged to the outside (S30). Here, it is assumed that the initial state of the first and second gas discharge valves V1 and V2 is in the off state and the path to the second gas discharge pipe PP2 is closed.

Then, the hybrid vehicle determines whether the sensed temperature is higher than a predetermined second reference temperature REF2 (S40). As described above, a case where the temperature of the secondary battery becomes too high is not preferable for the safety of the secondary battery. When the sensed temperature is higher than the second reference temperature REF2, the hybrid vehicle turns off the first and second gas discharge valves V1 and V2 so that the exhaust gas gs is not supplied to the secondary battery case CS The path to the second gas discharge pipe PP2 is closed (S50). On the other hand, as the path to the first gas discharge pipe PP1 is opened, the exhaust gas gs is discharged to the outside. That is, the temperature of the secondary battery 160 is not raised.

The hybrid vehicle determines whether the water level sensor WS generates a sensing signal as to whether the moisture of the exhaust gas gs is condensed in the secondary battery case CS (S60). If a detection signal is generated in the water level sensor WS, the water discharge valve V3 is turned on so that the accumulated solution is discharged to the lower end of the secondary battery case CS through the water discharge pipe.

Therefore, the hybrid vehicle and its secondary battery temperature control method of the present invention can heat the exhaust gas generated in the engine to the secondary battery to rapidly raise the temperature of the secondary battery at low temperatures, thereby improving the efficiency and safety of the hybrid vehicle . Further, since a separate heat generating device for raising the temperature of the secondary battery is not required, the hybrid vehicle can be simplified and the manufacturing cost can be reduced.

The method according to the present invention can be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and a carrier wave (for example, transmission via the Internet). The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (14)

An engine that receives a mixed gas of fossil fuel and air and burns the mixed gas to generate power;
A gas purifier for purifying an exhaust gas generated by combustion of the mixed gas in the engine;
A secondary battery charged with electric power or discharging charged electric power;
A motor that receives power from the secondary battery and generates power;
A secondary battery temperature regulator for supplying the exhaust gas discharged from the gas purifier to the outside of the secondary battery; And
And an ECU for controlling a temperature of the secondary battery by controlling the temperature controller according to a temperature of the secondary battery,
The secondary battery temperature regulator
A temperature sensor for sensing a temperature of the secondary battery and transmitting a temperature signal to the ECU;
A secondary battery case disposed inside the secondary battery and configured to allow the exhaust gas to flow around the secondary battery;
A first gas discharge pipe for discharging the exhaust gas supplied from the gas purifier to the outside;
A second gas discharge pipe for supplying the exhaust gas supplied from the gas purifier to the secondary battery case; And
Directional valve so as to control the flow of the exhaust gas supplied from the gas purifying unit to one of the first gas discharge pipe and the second gas discharge pipe according to a control signal applied from the ECU, A second gas discharge valve; And a hybrid vehicle. delete The battery pack according to claim 1, wherein the secondary battery case
Wherein the secondary battery is implemented in a double case structure and both ends of the secondary battery are connected to the second gas discharge pipe so that the exhaust gas can flow through the double structure. 4. The apparatus of claim 3, wherein the ECU
When the temperature detected by the temperature sensor is lower than a predetermined first reference temperature, the first and second gas discharge valves are turned on so that the exhaust gas is discharged to the outside through the secondary battery case, And turns off the first and second gas discharge valves so that the exhaust gas is immediately discharged to the outside without passing through the secondary battery case when the temperature is higher than the predetermined second reference temperature. car. The battery pack according to claim 3, wherein the secondary battery case
Wherein the exhaust gas flows to the upper end of the secondary battery so that condensation does not occur in the secondary battery case. The apparatus of claim 3, wherein the secondary battery temperature regulator
Further comprising moisture discharging means for discharging the accumulated liquid to the outside when condensation occurs in the inside of the secondary battery case and the liquid is accumulated. 7. The apparatus according to claim 6,
A moisture discharge pipe connected to a lower end of the secondary battery case;
A water level sensor disposed in the water discharge pipe to detect whether condensation of water occurs in the water discharge pipe; And
A water discharge valve for controlling the discharge of the liquid through the water discharge pipe in response to a detection signal of the water level detection sensor; And a hybrid vehicle. An engine for generating power by supplying a mixed gas of fossil fuel and air and generating the power by burning the mixed gas, a secondary battery for charging and discharging electric power, a motor for generating power by receiving power from the secondary battery, A secondary battery temperature regulating unit having a secondary cell case and a first and second gas discharge pipes formed to surround the secondary cell, and a ECU, and a gas purifying unit for purifying the exhaust gas generated by combustion of the gas, A method for controlling a temperature of a secondary battery of an automobile,
Sensing a temperature of the secondary battery through a temperature sensor included in the secondary battery temperature controller;
Allowing the exhaust gas purified by the gas purifying unit to flow through the secondary battery case when the temperature of the secondary battery is lower than a predetermined first reference temperature;
Discharging the exhaust gas to the outside without passing through the secondary battery case when the temperature is higher than a predetermined second reference temperature by a temperature higher than the first reference temperature; Lt; / RTI >
The step of flowing through the secondary battery case
The second gas discharge pipe for discharging the exhaust gas to the outside and the second gas discharge pipe for discharging the exhaust gas to the outside through the secondary battery case, And the first and second gas discharge valves are turned on so that the exhaust gas flows through the gas discharge pipe. delete 9. The method of claim 8, wherein the step of flowing through the secondary battery case
Wherein the exhaust gas flows through an upper portion of the secondary battery in the secondary battery case having a double case structure so that water condensation does not occur inside the secondary battery case. 9. The method of claim 8,
Wherein the first and second gas discharge valves are turned on so that the exhaust gas is discharged to the outside through the first gas discharge pipe. 9. The method of claim 8,
Sensing the level of the accumulated liquid when the secondary battery temperature control unit is condensed in the secondary battery case to accumulate the liquid and discharging the liquid to the outside through the water discharge pipe connected to the lower end of the secondary battery case The method of claim 1, further comprising: 13. The method of claim 12, wherein releasing the liquid
Detecting a level of the water discharge pipe by a water level sensor;
When the detection signal is generated from the water level sensor, turning on the water discharge valve disposed in the water discharge pipe to discharge the liquid to the outside through the water discharge pipe; And controlling the temperature of the secondary battery. A recording medium on which a computer-readable program is recorded for performing a method for controlling a temperature of a secondary battery of a hybrid vehicle according to any one of claims 8 to 10.

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