KR101262461B1

KR101262461B1 - Cooling Apparatus for Battery System of Vehicle and Control Method thereof

Info

Publication number: KR101262461B1
Application number: KR1020100108577A
Authority: KR
Inventors: 임해규
Original assignee: 기아자동차주식회사; 현대자동차주식회사
Priority date: 2010-11-03
Filing date: 2010-11-03
Publication date: 2013-05-08
Also published as: KR20120046980A

Abstract

The present invention enables the battery and the PE device to be heated and cooled so that the battery mounted in the vehicle does not depend on the indoor temperature of the vehicle, the operation of the air conditioner and the heater, and the like, so that the battery and the PE device can always be operated within the appropriate temperature range. The present invention provides a vehicle battery system cooling apparatus and a control method for stably securing operating performance and durability thereof and improving a cold start performance of the vehicle.

Description

Cooling Apparatus for Battery System of Vehicle and Control Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery system cooling apparatus and a control method for a vehicle. More particularly, the present invention relates to a structure of an apparatus for cooling a battery system mounted on a hybrid vehicle, a plug-in vehicle, an electric vehicle, and the like and a control method thereof.

Recently, an electric motor that can provide at least a portion of a driving force of a vehicle and a battery for driving the vehicle are mounted.

The battery as described above generates heat during charging and discharging of electricity, and a power electronic (PE) device including an inverter and a converter connected to the battery to manipulate electricity entering and exiting the battery, according to the operation thereof. Heat is generated and the heat generated in them must be cooled by appropriate means.

In addition, since the battery has an appropriate operating temperature range, proper performance cannot be expected at an excessively low temperature, and the durability of the battery is also lowered, so proper heating measures are required.

Conventionally, it has a simple configuration that mainly cools the battery and the PE device by using the air in the vehicle interior, so that the operating performance of the battery and the PE device is greatly influenced by the vehicle's room temperature. There is a tendency to greatly depend on the adjustment function, the cold start performance is difficult to secure adequate performance in the cold winter.

The present invention enables the battery and the PE device to be heated and cooled so that the battery mounted in the vehicle does not depend on the indoor temperature of the vehicle, the operation of the air conditioner and the heater, and the like, so that the battery and the PE device can always be operated within the appropriate temperature range. It is an object of the present invention to provide a battery system cooling apparatus and a control method of a vehicle, which can stably ensure an operational performance and durability thereof and also improve a cold start performance of the vehicle.

Battery system cooling apparatus of the present invention for achieving the above object is

A suction duct provided to supply the temperature control fluid to the battery and the PE device;

A thermoelectric element having a heat absorbing portion and a heat generating portion and receiving electricity to absorb heat from the heat absorbing portion and generate heat from the heat generating portion;

A flow regulating means adapted to adjust a state in which the temperature control fluid of the suction duct is in contact with the heat absorbing portion of the thermoelectric element and a state in which it is in contact with the heat generating portion;

A controller controlling the thermoelectric element and the flow regulating means;

And a control unit.

In addition, the method for controlling a battery system cooling apparatus of a vehicle according to the present invention
Determining a driver's approach to the vehicle;
Measuring the temperature of the battery when the driver approaches the vehicle;
Determining whether the temperature of the battery is within an optimum temperature range;
If the temperature of the battery is not within the optimum temperature range, driving the thermoelectric element such that the temperature of the battery is within the optimum temperature range, and heating or cooling all the temperature control fluids supplied to the suction duct;

And a control unit.

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The present invention enables the battery and the PE device to be heated and cooled so that the battery mounted in the vehicle is not dependent on the indoor temperature of the vehicle, the operation of the air conditioner and the heater, and the like, so that the battery and the PE device can always be operated within the appropriate temperature range. It ensures stable operation performance and durability, and improves the cold start performance of the vehicle.

1 is a view for explaining the configuration of a battery system cooling apparatus of a vehicle according to the present invention;
2 and 3 are views illustrating a method of controlling a battery system cooling apparatus of a vehicle according to the present invention, respectively.

1, an embodiment of the present invention includes a suction duct (1) provided to supply a temperature control fluid to a battery and a PE device; A thermoelectric element (7) having a heat absorbing portion (3) and a heat generating portion (5) and receiving electricity to absorb heat from the heat absorbing portion (3) and generate heat from the heat generating portion (5); Flow regulating means provided to adjust the state in which the temperature control fluid of the suction duct (1) flows in contact with the heat absorbing portion (3) of the thermoelectric element (7) and the state flows in contact with the heat generating portion (5) (9); It comprises a controller 11 for controlling the thermoelectric element 7 and the flow control means (9).

That is, by allowing the thermostatic element supplied to the battery and the PE device to be actively heated or cooled by using the thermoelectric element 7, the battery and the PE device are independently independent of the vehicle indoor temperature or the operation of the air conditioner and the heater. To control the temperature.

Here, the temperature control fluid may be air sucked from the inside of the vehicle as usual, air may be sucked from the outside of the vehicle, or may be a liquid such as cooling water that can be circulated separately. .

In the present embodiment, the thermoelectric element 7 is formed in a single flat form in which the heat absorbing portion 3 and the heat generating portion 5 are stacked, and the flow direction of the temperature control fluid flowing the suction duct 1 flows. While forming a long plane along, it is installed to form a partition for dividing the flow of the temperature control fluid into two sections in a portion of the suction duct (1).

Therefore, when the controller 11 supplies electricity to the thermoelectric element 7, the heat absorbing portion 3 of the thermoelectric element 7 absorbs heat from the temperature control fluid flowing while being in contact with the heat generating portion ( In 5), heat is supplied to the thermostatic fluid flowing in contact.

In the present embodiment, the flow control means (9) is a flap valve that is installed to be able to switch the state of flowing the temperature control fluid to one side or both sides of the suction duct (1) divided by the partition wall to the rotating flap ( 13). Of course, in addition to the flow control means 9 may be configured by a valve device provided separately to open and close each of the suction duct (1) divided into the thermoelectric element (7). That is, during the cold start of the vehicle, as shown in FIG. 1, the flow regulating means 9 moves upward in the drawing in the process of continuously passing the temperature control fluid by the suction pressure sucked from the right side of the suction duct 1. When rotated, the temperature control fluid is heated by the heat generating part 5 of the thermoelectric element 7, and then exits in the direction of the arrow shown on the left side of the suction duct 1 to be supplied to the battery or the PE device to be heated. On the other hand, when the operation of the battery is lower than the smoothest optimum temperature, when the flow control means 9 is rotated to the lower side in the drawing, the temperature control fluid is cooled by the heat absorbing portion 3 of the thermoelectric element 7 Thereafter, the battery duct is cooled along the direction of the arrow shown on the left side of the suction duct 1 and supplied to the battery or the PE device to cool the battery or the PE device.

In this embodiment, the suction duct (1) is further provided with a suction temperature sensor 15 for measuring the temperature of the temperature control fluid downstream of the thermoelectric element (7), the controller 11 is the suction temperature The signal from the sensor 15 is input to control the thermoelectric element 7.

Of course, the battery is often provided with a separate temperature sensor for measuring the temperature of the battery, the temperature sensor of the suction duct 1 is controlled by the thermoelectric element 7 and the flow control means (9) By measuring the temperature of the temperature control fluid is made to enable immediate feedback control of the thermoelectric element 7 and the flow control means (9), it is to enable a more rapid and accurate temperature control of the battery.

The operation of the embodiment of the present invention as described above can be implemented according to the following two control methods, there is a method for controlling before starting the vehicle, and a method for controlling after starting the vehicle.

First, referring to FIG. 2, the control is performed before starting the vehicle, and the method may include determining a driver's approach to the vehicle (S10); Measuring the temperature of the battery when the driver approaches the vehicle (S20); Determining whether the temperature of the battery is lower than a limit temperature (S30); When the temperature of the battery is lower than the limit temperature, the thermoelectric element 7 of any one of claims 1 to 4 is driven, and all the temperature control fluids supplied to the suction duct 1 are connected to the thermoelectric element 7. It comprises a step (S40) for controlling the flow control means 9 to flow while in contact with the heat absorbing portion (3).

That is, it monitors whether a driver carrying a smart device such as a smart key or smart phone approaches the vehicle, and when the driver's approach is detected, it is determined whether the temperature of the battery mounted in the vehicle is below the limit temperature. By judging, by controlling the thermoelectric element 7 and the flow control means 9 accordingly, it is possible to quickly increase the temperature of the battery in the cold start situation to ensure the smooth startability of the vehicle.

Here, the limit temperature may be, for example, when the vehicle is left in a large area for a long time, such as the temperature of the battery is minus 30 ℃, such a situation that it is difficult to start the vehicle due to poor operating performance of the battery This may be a temperature at which the performance of the battery is reduced to such an extent that it is difficult to start the vehicle.

Therefore, when the temperature of the battery is less than the limit temperature, the controller 11 supplies electricity to the thermoelectric element 7, and drives the flap valve 13, which is the flow control means 9, to operate the suction duct. All of the temperature control fluid passing through (1) is heated while passing through only the passage where the heat absorbing portion 3 is located, thereby heating the battery and the PE device, thereby rapidly raising the temperature of the battery to a level capable of generating a normal output. This greatly improves the cold startability of the vehicle.

On the other hand, Figure 3 is to ensure a smooth operating performance of the battery and to ensure the durability enough to maintain the temperature of the battery and PE device at an appropriate level in the state of starting the vehicle, Measuring the temperature (S100); Determining whether the temperature of the battery is within an optimum temperature range (S110); When the temperature of the battery is not within the optimum temperature range, the thermoelectric element 7 of claim 1 to 4 is driven, and the flow control means 9 is controlled so that the temperature of the battery is within the optimum temperature range. It includes a step (S120).

That is, the controller 11 receives information about the temperature of the battery, and determines whether the temperature is the optimum temperature, that is, the temperature of the battery which is smoothest, for example, about 30 to 35 ° C. When the temperature is lower than the optimum temperature, while driving the thermoelectric element 7, the temperature control fluid flows only to the heat generating portion 5 through the flap valve 13 to raise the temperature of the battery, and When the temperature rises above the optimum temperature, the temperature control fluid flows only to the endothermic portion 3 with the singer flap valve 13 so as to lower the temperature of the battery, and the temperature of the battery is within the optimum temperature range. If there is, the driving of the thermoelectric element 7 is stopped, and the temperature regulating fluid flows to either one or both of the heat absorbing portion 3 and the heat generating portion 5 by the flap valve 13, Lee's temperature to the feedback control to the range of the optimum temperature.

By the control as described above, the battery and the PE device always provide a stable and smooth operating performance, thereby ensuring a sufficiently long service life of the battery.

One; Suction duct
3; Endotherm
5; The heating unit
7; Thermoelectric element
9; Flow control means
11; controller
13; Flap valve
15; Suction temperature sensor

Claims

A suction duct provided to supply the temperature control fluid to the battery and the PE device;
A thermoelectric element having a heat absorbing portion and a heat generating portion and receiving electricity to absorb heat from the heat absorbing portion and generate heat from the heat generating portion;
A flow regulating means adapted to adjust a state in which the temperature control fluid of the suction duct is in contact with the heat absorbing portion of the thermoelectric element and a state in which it is in contact with the heat generating portion;
A controller for controlling the thermoelectric element and the flow regulating means;
Battery system cooling apparatus of a vehicle, characterized in that configured to include.

The method according to claim 1, wherein the thermoelectric element
The heat absorbing portion and the heat generating portion is made of a single flat plate,
A long plane is formed along the flow direction of the temperature control fluid flowing through the suction duct, and is installed to form a partition wall dividing the flow of the temperature control fluid into two sections in a portion of the suction duct.
Cooling device for a battery system of a vehicle, characterized in that.

The method of claim 2, wherein the flow control means
Composed of a flap valve installed to change the state of flowing the temperature control fluid to one side or both sides of the suction duct divided into the partition wall by the rotating flap
Cooling device for a battery system of a vehicle, characterized in that.

The method according to claim 3,
The suction duct is further provided with a suction temperature sensor for measuring the temperature of the temperature control fluid downstream of the thermoelectric element;
The controller is configured to receive a signal from the suction temperature sensor, to control the thermoelectric element.
Cooling device for a battery system of a vehicle, characterized in that.

Determining a driver's approach to the vehicle;
Measuring the temperature of the battery when the driver approaches the vehicle;
Determining whether the temperature of the battery is within an optimum temperature range;
If the temperature of the battery is not within the optimum temperature range, driving the thermoelectric element such that the temperature of the battery is within the optimum temperature range, and heating or cooling all the temperature control fluids supplied to the suction duct;
Battery system cooling apparatus control method of a vehicle comprising a.

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