KR20020046728A - A battery voltage compensating apparatus and a method useful compressed air - Google Patents

Abstract

PURPOSE: A device for compensating for voltage of battery with compressed air and a method of the same are provided to maintain a performance of battery at low temperature by flowing out an air stored in an air tank and driving a generator to charge a battery with a voltage. CONSTITUTION: A temperature detection unit(10) consists of a thermistor(TH) which senses an environmental temperature, a resistor(R1), and a comparator(COM) which compares a voltage determined in the thermistor(TH) and the resistor(R1) with a reference voltage(Vref). A starting on/off sensing unit(20) senses a starting of a car and outputs a corresponding signal. A controller(30) outputs a valve driving control signal. A first and a second air switch valve(40,45) operate according to the valve driving control signal. An air tank(50) stores or discharges a compressed air according to the operation of the first and the second air switch valve(40,45). A generator(60) operates by a pressure of the air discharged from the air tank(50) and supplies a battery(70) with a voltage.

Description

A battery voltage compensating apparatus and a method useful compressed air using compressed air

The present invention relates to a battery voltage compensator using compressed air and a method thereof, and more particularly, to compress and store air in an air tank when driving a vehicle equipped with a diesel engine in a cold weather, and to store the engine when the vehicle is not operated. Battery voltage compensation device using compressed air that improves battery performance at low temperature by detecting ambient temperature and draining air stored in air tank and driving generator to charge battery in low temperature. It is about.

In general, a diesel engine is an engine that generates power by ignition of fuel by compressed heat of compressed air, and is an intake heater (GLOW PLUG, AIR HEATER) that heats intake air using a battery power source of a vehicle to facilitate startability during cold. It is composed of AUTO FLAME HEATER and fuel heater to improve cold startability in cold weather or cold weather (below -20 ℃).

As described above, driving the intake heater and the fuel heater device depending on the battery power source has the following problems.

First, rapid cold start is difficult with only intake air and fuel at temperatures below -32 ° C.

Second, below -29 ° C, the performance of the battery is reduced to 50% or less.

Third, considering the power to start the starter using the battery power, it is difficult to apply an additional preheater.

Fourth, the existing preheaters simply heat the intake or fuel, coolant and engine oil respectively, which limits the overall cold start performance of the engine.

Accordingly, an object of the present invention is to compress and store air in the air tank when driving a vehicle equipped with a diesel engine in the cold weather, and detect the ambient temperature of the engine when the vehicle is not running to detect the air stored in the air tank below a certain temperature The present invention provides a battery voltage compensator using compressed air and a method for improving battery performance at which the performance is degraded at a low temperature by driving a generator to charge a battery.

In order to achieve the above object, a battery voltage compensator using compressed air according to the present invention includes a temperature detector for detecting an ambient temperature of a battery installed in a vehicle and outputting data corresponding thereto, and whether the vehicle is started or not. A start on / off detector for detecting and outputting a signal corresponding thereto, a controller for outputting a valve drive control signal according to data output from the temperature detector and a start on / off detector, and a valve output from the controller First and second valves operated according to a drive signal, an air tank for compressing and storing air and discharging the compressed air according to the operation of the first and second valves, and the air pressure discharged from the air tank to generate a predetermined value. It characterized by consisting of a generator for supplying the voltage of the battery.

On the other hand, in the method according to the present invention, the air inlet step of "on" the air valve in the state in which the vehicle is driven to drive the outside air into the air tank, and the air introduced in the air inlet step to the air tank An air tank storage step for compressing and storing, a start " off " determination step for judging whether the start is "off" in a state in which air is stored in the air tank, and if the start is turned off as a result of the start-up judging step, A temperature detection step for detecting the ambient temperature, a temperature determination step for determining whether the temperature detected in the temperature detection step is less than a predetermined value, and if the temperature is less than the predetermined value as a result of the determination in the temperature determination step, the air stored in the air tank is compressed. A generator driving step of discharging the generator to drive the generator; and supplying a voltage generated by the generator to the battery. It is characterized by being a Battery voltage compensation step for compensating the voltage re.

1 is a view showing a battery voltage compensation device using the compressed air according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the battery voltage compensator using the compressed air shown in FIG.

* Description of the symbols for the main parts of the drawings *

10: temperature detection unit 20: start on / off detection unit

30: controller 40, 45: air opening and closing valve

50: air tank 60: oscillator

70: battery

Hereinafter, with reference to the accompanying drawings the present invention will be described in more detail.

1 is a view showing a battery voltage compensation device using the compressed air according to the present invention, Figure 2 is a flow chart illustrating the operation of the battery voltage compensation device using the compressed air shown in FIG.

The battery voltage compensation device shown in FIG. It is determined by the dummy sensor TH and the resistor R1 and the dummyster TH and the resistor R1 to detect the ambient temperature of the battery 70 mounted in the vehicle and output corresponding data. A temperature detector 10 including a comparator COM for comparing a voltage and a reference voltage Vref, a startup on / off detector 20 for detecting whether the vehicle is started and outputting a signal corresponding thereto; The controller 30 outputs a valve drive control signal according to the data output from the temperature detector 10 and the start on / off detection unit 20, and the controller 30 is operated according to the valve drive signal output from the controller 30. An air tank 50 for compressing and storing air and discharging the compressed air according to operations of the first and second air open / close valves 40 and 945 and the first and second air open / close valves 40 and 45, Generated by the air pressure discharged from the air tank 50 to generate a predetermined voltage It is comprised by the generator 60 supplied to the battery 70.

The operation of the battery voltage compensation device using the compressed air having the above configuration will be described in detail with reference to the flowchart shown in FIG. 2.

When starting to drive the vehicle equipped with the device according to the invention, the data detected by the start on / off detection unit is supplied to the controller 30 and at the same time the vehicle driving state as shown in step S1 of FIG.

When the vehicle is in the driving state as in step S1, the controller 30 operates the first air open / close valve 40 as in step S2 so that external air flows into the air tank 50 along the flow path, thereby providing the air tank 50. Air is compressed and stored as in step S3.

As described above, it is determined in step S4 whether the startup is "off" while the air is compressed and stored in the air tank 50. If the startup is turned off as a result, the flow proceeds to step S5 to detect the ambient temperature of the battery.

That is, the ambient temperature of the battery is detected by the temperature detector 10. When the value determined by the dummy resistor TH and the resistor R1 in which the internal resistance value changes according to the ambient temperature is greater than the reference voltage Vref, the comparator ( Since the output level of COM) is inverted to the "low" state and supplied to the controller 30, the controller 30 determines whether the ambient temperature is lower than a predetermined value in step S6, and compresses and stores it in the air tank 50 as in step S7. Discharge the air.

When the compressed air is discharged as described above, the generator 60 is driven to compensate the voltage to the battery 70 as in step S8.

According to the present invention described above, when driving a vehicle equipped with a diesel engine in a cold weather, compressed air is stored in an air tank, and when the vehicle is not driven, the air is stored in the air tank when the engine ambient temperature is below a predetermined temperature to leak. By driving the generator to charge the battery voltage has an effect of improving the battery performance is degraded at low temperatures.

Claims (3)

A temperature detector for detecting an ambient temperature of the battery installed in the vehicle and outputting data corresponding thereto; A start on / off detection unit for detecting whether the vehicle is started and outputting a signal corresponding thereto; A controller for outputting a valve driving control signal according to data output from the temperature detector and the start on / off detector; First and second valves operated according to valve driving signals output from the control unit; An air tank configured to compress and store air according to the operation of the first and second valves and to discharge the compressed air; The battery voltage compensation device using the compressed air, characterized in that the generator is generated by the air pressure discharged from the air tank to supply a predetermined voltage to the battery. According to claim 1, wherein the temperature detector detects the ambient temperature of the battery 70 mounted on the vehicle and outputs the data corresponding to the dummy sensor TH and the resistor (R1) and the dummyster And a comparator (COM) for comparing the voltage determined by (TH) and the resistor (R1) with a reference voltage (V ref). An air inlet step of “on” the air valve to introduce external air into the air tank when the vehicle is driven and the air tank storage step of compressing and storing the air introduced in the air inlet step into the air tank when the vehicle is driven and started; A startup " off " determination step for determining whether startup is " off " in the state of storing air in the air tank; a temperature detection step for detecting ambient temperature of the battery if the startup is off as a result of the determination in the startup off determination step; A temperature determination step of determining whether the temperature detected by the temperature detection step is less than a predetermined value, and a generator driving step of driving the generator by discharging the compressed air stored in the air tank when the temperature is less than the predetermined value as the result determined by the temperature determination step. And a battery that compensates the battery voltage by supplying a voltage generated by the generator to the battery. Battery voltage compensation method using compressed air, characterized in that consisting of a voltage compensation step.