KR20130025119A - Apparatus for cooling power module of green car and method thereof - Google Patents

Abstract

PURPOSE: A power module cooling apparatus of environmental friendly vehicle is provided to improve noise by the cooling fan and to secure the optimal cooling efficiency by actively controlling the drive speed of the cooling pan which providing air cooler to the power module. CONSTITUTION: A power module cooling apparatus of environmental friendly vehicle comprises the power module(100), the cooling fan(105), the temperature detecting unit(111), and the battery management system(BMS) (104). The power module comprises the main battery(101), the charger(102), and the DC-DC converter(103). The charger charges the main battery as the power source. The DC-DC converter charges the sub battery for the front tenon by high voltage of the main battery. The cooling pan controls the air flow supplied to the each unit of the power unit and cools. The temperature detecting unit detects the temperature of air flowed into the power module. The BMS decides the cooling fan drive duty according to the cooling demand supplied by each unit of the power unit, and actively controls the drive of the cooling fan by applying the temperature of flowed air to the cooling fan drive duty. [Reference numerals] (101) Main battery; (102) Charger; (103) DC-DC converter; (105) Cooling fan; (AA) Sucked air; (BB) Discharged air

Description

Power module cooling device and method of eco-friendly vehicle {APPARATUS FOR COOLING POWER MODULE OF GREEN CAR AND METHOD THEREOF}

The present invention relates to a power module cooling apparatus of an environmentally friendly vehicle, and more particularly, to actively control a driving speed of a cooling fan that provides air cooling to a power module to improve noise by the cooling fan and to provide an optimal cooling efficiency. It relates to a power module cooling apparatus and method of an environmentally friendly vehicle.

In general, eco-friendly vehicles such as hybrid cars and electric vehicles are installed in the trunk room by a power module including a main battery, a charger, a DC-DC converter, and a forced air cooling type is applied.

For forced air cooling of power modules consisting of packages, the air flow is distributed so that each component can be cooled evenly, and the temperature of each component constituting the power module is detected and installed at the outlet side. The flow of air is controlled by controlling the speed of the cooling fan.

Therefore, in the power module configured as a package, overheating of components having high heat generation, that is, a diode, a power switching device, a main battery composed of several cells, a charger, a DC-DC converter, and the like is prevented.

Cooling control of power module is in charge of BMS (Battery Management System) which manages the charge / discharge function of main battery.

Each unit constituting the power module is mapped such that the cooling demand duty increases in steps with temperature, thereby providing the BMS with the required duty for cooling according to the temperature condition.

The BMS receives the cooling request duty provided by each unit constituting the power module and then takes the maximum value to control the cooling fan.

For example, by controlling the speed of the cooling fan by applying the maximum value of the first duty provided by the DC-DC converter and the second duty required by the charger, the flow of air for cooling the power module is adjusted.

In the conventional power module cooling method, only the temperature of the heat generating portion of each unit of the power module configured as a package is considered.

Therefore, the temperature of the air sucked into the package power module is not taken into consideration, so if the cabin temperature or the air in the trunk room is warmed up due to long parking during the summer, or in general, the air flows outside the heat generation temperature of each unit of the power module. If the temperature of the intake air is high, the cooling performance for the power module may be degraded or may cause a problem that may adversely affect.

In addition, the BMS takes the maximum value of the duty required for cooling from the main battery, charger, and DC-DC converter constituting the power module to control the speed of the cooling fan, thereby controlling the degree of freedom from noise generated from the cooling fan during parking / stopping. The problem of falling may occur.

According to an embodiment of the present invention to actively control the driving speed of the cooling fan providing air cooling to the power module to improve the noise by the cooling fan and to provide the optimum cooling efficiency.

According to an embodiment of the present invention, there is provided a power module including a main battery, a charger for charging the main battery with a commercial power supply, and a DC-DC converter for charging an auxiliary battery for electric load with a high voltage of the main battery; Cooling fan for cooling by adjusting the air flow supplied to each unit constituting the power module; A temperature detector detecting a temperature of air flowing into the power module; Eco-friendly vehicle including a BMS (Battery Controller) which determines the cooling fan drive duty according to the cooling requirements provided by each power module and actively controls the operation of the cooling fan by applying the temperature of the inlet air to the cooling fan drive duty. The power module cooling device of the present invention is provided.

If the temperature of the inlet air provided from the temperature detector is lower than the set minimum reference temperature (T_low), the BMS (battery controller) determines the driving speed of the cooling fan to the third speed (Mid_L) or the first by determining the stable air cooling temperature condition. Can be controlled by low (L_L).

The BMS (battery controller) determines that the temperature of the inlet air is higher than the heat generation temperature of the power module when the temperature of the inlet air provided from the temperature detector is higher than the set maximum reference temperature (T_High) to drive the cooling fan. You can turn it off.

The BMS (Battery Controller) provides the control information of the cooling fan to the unit requesting the maximum cooling as 'ACK' information when the driving of the cooling fan is determined as the maximum duty, and receives the 'ACK' information from the BMS. The unit may calculate the integrated value of the current for a predetermined time ΔT, and when the temperature falls below the set reference value, the unit may gradually lower the driving request duty of the cooling fan according to the temperature drop and then output the cooling fan driving request.

The BMS (Battery Controller) can provide the operating mode of the cooling fan to the associated units and controllers.

In addition, a feature according to another embodiment of the present invention comprises the steps of determining the duty value for driving the cooling fan by detecting the cooling request of the main battery, charger, DC-DC converter constituting the power module; Detecting a temperature of air flowing into the power module; There is provided a power module cooling method of an eco-friendly vehicle including applying a temperature of an inlet air to the cooling fan driving duty value to actively control a driving speed of the cooling fan.

If the temperature of the air flowing into the power module exceeds the set maximum reference temperature (T_high) by comparing the temperature of the air flowing into the power module with the set maximum reference temperature (T_high), the driving of the cooling fan is stopped to reverse the power module. It can prevent to keep warm.

If the duty for driving the cooling fan is not determined as the maximum driving value, and the temperature of the air flowing into the power module is less than the set minimum reference temperature T_low, the cooling fan is operated at the third speed Mid_L or the first speed Low_L. Can be driven.

If the duty for driving the cooling fan is not determined as the maximum driving value, and the temperature of the air flowing into the power module is equal to or higher than the set minimum reference temperature T_low, the cooling fan is operated at the fourth speed Mid_H or the second speed Low_H. Can be driven.

When the duty for driving the cooling fan is determined as the maximum driving value, and the temperature of the air flowing into the power module is less than the set minimum reference temperature T_low, the cooling fan may be driven at the fifth speed Max_L.

When the duty for driving the cooling fan is determined as the maximum driving value, and the temperature of the air flowing into the power module is equal to or higher than the set minimum reference temperature T_low, the cooling fan may be driven at the sixth speed Max_H.

When the duty for driving the cooling fan is determined as the maximum driving value, the BMS (battery controller) provides the control information of the cooling fan to the unit requesting the maximum driving of the cooling fan as 'ACK', and the BMS (battery controller) Receiving 'ACK' information from the unit, the unit calculates the integrated value of the current for a predetermined time (△ T) to determine whether it falls below the set reference value.If the integrated value of the current falls below the set reference value, the cooling fan according to the temperature drop. By lowering the driving demand duty of the step by step BMS (battery controller), the BMS (battery controller) can control the drive speed of the cooling fan according to the drive demand of the cooling fan and the temperature of the air flowing into the power module.

As described above, the present invention can actively control the speed of the cooling fan for air module cooling and the operation time at the maximum output, thereby reducing the electric load and increasing the cooling efficiency.

In addition, when the air temperature flowing into the power module is higher than the heat generation temperature of each unit of the power module, by turning off the cooling fan, it is possible to prevent the phenomenon in which each unit is insulated backwards, thereby increasing safety and cooling efficiency.

1 is a view schematically showing a power module cooling apparatus of an environment-friendly vehicle according to an embodiment of the present invention.
2 is a flowchart illustrating a power module cooling procedure of an eco-friendly vehicle according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention can be embodied in various different forms, and thus the present invention is not limited to the embodiments described herein.

1 is a view schematically showing a power module cooling apparatus of an environment-friendly vehicle according to an embodiment of the present invention.

Referring to Figure 1, the present invention is composed of a plurality of cells, the main battery 101 is stored a high voltage for driving the motor and the charger 102 for converting the external commercial power to a DC voltage to perform the charging of the main battery, The DC-DC converter 103 which converts the high voltage of the main battery 101 to charge the secondary battery for electric load, controls the charging / discharging of the main battery, and the duty and inflow of the external battery according to the temperature provided by each unit. The speed is controlled according to the control of the BMS 104 and the BMS 104 to actively control the on / off and the speed of the cooling fan 105 in accordance with the temperature of the air to provide the flow and inflow / outflow of each air Cooling fan 105 for executing the cooling of the unit is composed of one package power module 100 may be installed in the trunk room.

One side of the power module 100 is provided with an air inlet 110 through which the outside air is introduced, and on the other side, an air outlet 120 for discharging the air that has undergone heat exchange with each unit of the power module 100 to the outside. ) Is installed, and a temperature detector 111 for detecting the temperature of the air flowing into the power module 100 and providing it to the BMS 104 at a predetermined position on one side of the air inlet 110.

The BMS 104 determines the duty for driving the cooling fan according to the cooling request provided by each unit of the power module 100, and applies the temperature of the air provided from the temperature detector 111 to the cooling fan driving duty. By actively controlling the on / off and driving speed of the cooling fan to provide efficient cooling of each unit constituting the power module 100, and to minimize the consumption of the electric load to improve the efficiency of the system.

When the temperature of the air flowing into the power module 100 provided by the temperature detector 111 is lower than the set minimum reference temperature T_low, the BMS 104 is cooled because the temperature of the air has a very good cooling. Slowly controlling the driving speed of the fan 105 minimizes the consumption of electric load.

When the temperature of the air flowing into the power module 100 provided by the temperature detector 111 is higher than the set maximum reference temperature T_high, the BMS 104 has a temperature of the air flowing into the power module 100. It is judged that the state is higher than the heat generation temperature of the unit, the driving of the cooling fan 105 is turned off.

Therefore, it is possible to prevent the phenomenon in which each unit of the power module 100 is insulated back by the air introduced at a high temperature.

When the driving duty of the cooling fan 105 is determined to be the maximum value, the BMS 104 provides the control information of the cooling fan 105 as 'ACK' to the unit requesting the maximum cooling, and from the BMS 104. When the unit receives the 'ACK', the unit calculates the integrated value of the current for a predetermined time (ΔT) and lowers the driving request duty of the cooling fan 105 step by step according to the temperature drop when the integrated value of the current falls below the set reference value. Output

Therefore, the BMS 104 may shorten the time for which the cooling fan 105 is operated at the maximum speed, thereby improving the noise problem during parking / stopping, and reducing the electric load consumption.

In addition, the BMS 104 can provide an operating mode of the cooling fan 105 to the associated units and controllers to enforce power limitations when the system is off to prevent overheating conditions, thereby protecting power components in the unit from thermal stress. .

The operation of the present invention including the functions as described above is executed as follows.

When the eco-friendly vehicle to which the present invention is applied is turned on, the BMS 104 is provided as a duty signal from the main battery 101, the charger 102, and the DC-DC converter 103, which are units constituting the power module 100. The cooling request is detected (S101).

Thereafter, the duty for driving the cooling fan 105 is calculated according to the cooling request provided by each unit constituting the power module 100 (S102).

In addition, the BMS 104 monitors the temperature T_inlet of the air flowing into the power module 100 from the temperature detector 111 (S103), and the temperature T_inlet of the introduced air is higher than the set maximum reference temperature T_high. It is determined whether the state is high (S104).

In S104, when the temperature T_inlet of the air flowing into the power module 100 is higher than the set maximum reference temperature T_high, the temperature of the air introduced is the exothermic temperature of each unit of the power module 100. It is determined that each unit of the power module 100 can be warmed up higher (S105) to turn off the driving of the cooling fan 105 (S106).

Therefore, it is possible to prevent the phenomenon in which each unit of the power module 100 is insulated back by the air introduced at a high temperature.

In S104, when the temperature T_inlet of the air flowing into the power module 100 is lower than the set maximum reference temperature T_high, the BMS 104 determines the driving duty of the cooling fan 105 as the maximum value in S102. It is determined whether or not (S107).

In S107, when the driving duty of the cooling fan 105 is not determined as the maximum value, the BMS 104 sets a temperature T_inlet of the air flowing into the power module 100 at the driving duty of the cooling fan 105. It is determined whether or not the minimum reference temperature (T_low) or less (S108).

In S108, when the temperature of the air flowing into the power module 100 is greater than or equal to the set minimum reference temperature T_low, the BMS 104 sets the driving duty of the cooling fan 105 to the fourth speed Mid_H or the second speed Low_H. The drive speed of the cooling fan 105 is controlled (S109).

However, in S108, when the temperature T_inlet of the air flowing into the power module 100 is lower than the set minimum reference temperature T_low, the BMS 104 has a cooling fan because the temperature of the air has a very good cooling. The driving duty of the 105 is output at the third speed Mid_L or the first speed Low_L to control the driving speed of the cooling fan 105 (S110).

Therefore, consumption of electric load due to the driving of the cooling fan 105 is minimized.

In addition, when it is determined in step S107 that the duty for driving the cooling fan 105 is determined to be the maximum value, the BMS 104 determines that the cooling fan 105 is controlled at the maximum driving speed to the corresponding unit requesting the maximum cooling. Provided as 'ACK' (S111).

Subsequently, the unit receiving the 'ACK' from the BMS 104 calculates an integrated value of the current for a predetermined time ΔT, and when the temperature falls below the set reference value, the driving request of the cooling fan 105 according to the temperature decrease. The duty is lowered step by step and then provided to the BMS 104 as a cooling request (S112).

Therefore, the BMS 104 determines whether the cooling request provided from each unit of the power module 100 is detected to be smaller than the set maximum value (S113).

In S113, the BMS 104 returns to the process of S102 if the cooling request required by each unit of the power module 100 is smaller than the set maximum value, and if it is not small, the temperature of the air flowing into the power module 100 is It is determined whether the state is lower than the set minimum reference temperature T_low (S114).

In S114, when the temperature T_inlet of the air flowing into the power module 100 is higher than the set minimum reference temperature T_low, the BMS 104 sets the driving duty of the cooling fan 105 to the sixth speed Max_H. It outputs to control the driving speed of the cooling fan 105 at the highest speed (S115).

However, in S114, when the temperature T_inlet of the air flowing into the power module 100 is lower than the set minimum reference temperature T_low, the BMS 104 sets the driving duty of the cooling fan 105 to the fifth speed Max_L. The drive speed of the cooling fan 105 is controlled (S116).

That is, by lowering the driving speed by the cooling fan 105 step by step, the time that the cooling fan 105 is operated at the maximum speed is shortened to improve the noise problem during parking / stopping and to reduce the electric load consumption. Can be seen.

In addition, the BMS 104 can provide operating modes of the cooling fan 105 to the associated units and controllers to enforce power limitations when the cooling system is off to prevent overheating conditions, thereby protecting power components in the unit from thermal stress. have.

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 exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: power module 101: main battery
102: charger 103: DC-DC converter
105: cooling fan 111: temperature detection unit

Claims (12)

A power module including a main battery, a charger for charging the main battery with a commercial power supply, and a DC-DC converter for charging the auxiliary battery for electric load with the high voltage of the main battery;
Cooling fan for cooling by adjusting the air flow supplied to each unit constituting the power module;
A temperature detector detecting a temperature of air flowing into the power module;
A BMS (battery controller) which determines a cooling fan driving duty according to cooling requirements provided by each power module, and actively controls driving of the cooling fan by applying a temperature of inlet air to the cooling fan driving duty;
Power module cooling device of an eco-friendly vehicle comprising a. The method of claim 1,
If the temperature of the inlet air provided from the temperature detector is lower than the set minimum reference temperature (T_low), the BMS (battery controller) determines the driving speed of the cooling fan to the third speed (Mid_L) or the first by determining the stable air cooling temperature condition. Power module cooling device for an eco-friendly vehicle, characterized in that controlled by low (Low_L). The method of claim 1,
The BMS (battery controller) determines that the temperature of the inlet air is higher than the heat generation temperature of the power module when the temperature of the inlet air provided from the temperature detector is higher than the set maximum reference temperature (T_High) to drive the cooling fan. Power module cooling device of an eco-friendly vehicle, characterized in that off. The method of claim 1,
The BMS (Battery Controller) provides the control information of the cooling fan as 'ACK' information to the unit requesting the maximum cooling, when the driving of the cooling fan is determined as the maximum duty.
When the unit receives the 'ACK' information from the BMS, the unit calculates the integrated value of the current for a predetermined time (ΔT) and lowers the driving request duty of the cooling fan step by step according to the temperature drop when the integrated value falls below the set reference value. Power module cooling device for an eco-friendly vehicle, characterized in that output as a fan drive request. The method of claim 1,
The BMS (battery controller) is a power module cooling device for an eco-friendly vehicle to provide the operation mode of the cooling fan to the associated unit and the controller. Determining a duty value for driving a cooling fan by detecting a cooling request of a main battery, a charger, and a DC-DC converter constituting the power module;
Detecting a temperature of air flowing into the power module;
Actively controlling a driving speed of a cooling fan by applying a temperature of inlet air to the cooling fan driving duty value;
Power module cooling method of an environmentally friendly vehicle comprising a. The method according to claim 6,
If the temperature of the air flowing into the power module exceeds the set maximum reference temperature (T_high) by comparing the temperature of the air flowing into the power module with the set maximum reference temperature (T_high), the driving of the cooling fan is stopped to reverse the power module. Cooling method of the power module of the eco-friendly vehicle, characterized in that to prevent the warmth. The method according to claim 6,
If the duty for driving the cooling fan is not determined as the maximum driving value, and the temperature of the air flowing into the power module is less than the set minimum reference temperature T_low, the cooling fan is operated at the third speed Mid_L or the first speed Low_L. Power module cooling method of an eco-friendly vehicle, characterized in that driven by. The method according to claim 6,
If the duty for driving the cooling fan is not determined as the maximum driving value, and the temperature of the air flowing into the power module is equal to or higher than the set minimum reference temperature T_low, the cooling fan is operated at the fourth speed Mid_H or the second speed Low_H. Power module cooling method of an eco-friendly vehicle, characterized in that driven by. The method according to claim 6,
The duty for driving the cooling fan is determined as the maximum driving value, and if the temperature of the air flowing into the power module is less than the set minimum reference temperature (T_low), the cooling fan is driven at a fifth speed (Max_L) How to cool the power module of a vehicle. The method according to claim 6,
The duty for driving the cooling fan is determined as the maximum drive value, and if the temperature of the air flowing into the power module is higher than the set minimum reference temperature (T_low), the cooling fan is driven at a sixth speed (Max_H) How to cool the power module of a vehicle. The method according to claim 6,
When the duty for driving the cooling fan is determined as the maximum driving value, the BMS (battery controller) provides the control information of the cooling fan to the unit requesting the maximum driving of the cooling fan as 'ACK',
Receiving 'ACK' information from the BMS (battery controller), the corresponding unit calculates the integrated value of the current for a predetermined time (△ T) to determine whether or not lower than the set reference value,
When the integrated value of the current falls below the set reference value, the BMS (battery controller) requests the BMS (battery controller) by gradually lowering the driving demand duty of the cooling fan according to the temperature drop.
BMS (battery controller) is a power module cooling method of the eco-friendly vehicle, characterized in that for controlling the driving speed of the cooling fan according to the drive fan's driving requirements and the temperature of the air flowing into the power module.

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