KR200169115Y1 - Battery management system - Google Patents

Abstract

The present invention relates to a battery management system, and detects and amplifies the battery voltage and current, the temperature of the motor battery and the controller, and then converts the digital signal processed by the microprocessor unit and applied for a function key. By displaying on the LCD, you can check the battery abnormally.

Description

Battery management system

Figure is a block diagram showing a battery management system according to the present invention

* Explanation of symbols for main parts of the drawings

1: Amplifier 2: Multiplexer

3: A / D converter 4: Temperature converter

5: microprocessor unit 6: function key

7: LCD

The present invention relates to a battery management system, and more particularly, to a battery management system capable of displaying information such as charge ratio, overcurrent, overvoltage, over-discharge and overheating of the battery.

Generally, batteries installed in automobiles are frequently used for various purposes, and accordingly, proper recharging is required.

The object of the present invention is to provide a battery management system that can detect a timely presence of a battery and cope with it.

Battery management system according to the present invention for achieving the above object, the amplification unit for amplifying the detected signal after detecting the current and voltage of the battery and the temperature of the motor battery and the controller, by the amplification unit Among the amplified signals, a multiplexer that sequentially selects and outputs current and voltage signals of the battery, an analog-to-digital converter that converts the signals sequentially selected and output by the multiplexer into a digital signal, and among the signals amplified by the amplifier. A temperature converter for converting a motor battery temperature signal and a controller temperature signal from an AC type into a DC type signal having a voltage level corresponding to each detected value, and sequentially outputting the same from the analog-to-digital converter and the temperature converter. Charge ratio or overcurrent or overvoltage or overdischarge of battery by applied signal And a microprocessor unit for outputting a display signal for displaying information selected by the driver by pressing a function key, and displaying information corresponding to the display signal from the microprocessor unit. Characterized in that the display portion.

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

Figure is a block diagram showing a battery management system according to the present invention, the amplifier (1) for amplifying the detected signal after detecting the current and voltage of the battery (not shown) and the temperature of the motor battery and the controller And a multiplexer (2) which sequentially selects current and voltage signals of the battery among the signals amplified by the amplifier (1), converts them into one output, and converts the signals output from the multiplexer (2) into digital signals. Among the signals amplified by the A / D converter 3 to be converted and the amplifying unit 1, the AC battery motor temperature signal and the controller temperature signal are converted into DC signals having a voltage level corresponding to each temperature sensing value. A temperature converter 4 that sequentially selects and converts the output into a single output, a signal converted by the A / D converter 3, and a signal output from the temperature converter 4 are received. Wow A microprocessor unit 5 for determining the temperature of the motor battery and the controller and calculating the calculated temperature and outputting a display signal for displaying information such as charge ratio / overcurrent / overvoltage / overdischarge / overheat, and charging ratio / overcurrent / overvoltage / And a function key 6 for selecting a function such as overdischarge / overheating, and an LCD 7 for displaying corresponding information in accordance with a display signal from the microprocessor unit 5.

The LCD 7 is provided with an information display lamp for each piece of information so that the information according to the display signal of the microprocessor 5 is displayed and the lamp is turned on accordingly.

On the other hand, in the present invention, the sensor for detecting the voltage and current of the battery and the temperature of the motor battery and the controller is not described in detail, the sensor and the temperature sensor for detecting the voltage and current in the art for the main body in the art. Since it is applicable, the other description is abbreviate | omitted.

Referring to the operation principle of the present invention configured as described above are as follows.

After detecting the current and voltage of the battery (not shown), the temperature of the motor battery and the temperature of the controller by the sensor (not shown), the detected signal is applied to the amplifier 1 to amplify each signal, and Among the amplified signals, the current and voltage signals of the battery are sequentially selected and output through the multiplexer 2, and at this time, an identification code is assigned to distinguish the signals from the microprocessor unit 5.

The current and voltage signals sequentially selected and output through the multiplexer 2 are converted into digital signals by the A / D converter 3 and input to the microprocessor unit 5.

At the same time, the motor battery temperature signal and the controller temperature signal of the AC type among the signals amplified by the amplifier 1 are converted into a DC type signal having a voltage level corresponding to each sensed value in the temperature converter 4. Next, the signals are sequentially selected and output to the microprocessor unit 5, and the signals sequentially selected and output are assigned an identification code to distinguish each signal from the microprocessor unit 5 (for example, a battery temperature). The high level and low level signals of one cycle are given to the front end of the signal, and the high level and low level signals of two cycles are given to the front of the controller temperature signal.

Here, the microprocessor unit 5 discriminates the voltage level and the current value of the battery by the digital current and the voltage signal which are sequentially selected and input from the A / D converter 3 and from the temperature changer 4. The temperature of the motor battery and the temperature of the controller are determined by the voltage level of the direct current type temperature signal.

At this time, when the driver selects a function such as charge ratio, overcurrent, overvoltage, overdischarge, overheating, etc. in the function key 6, a key signal corresponding to the function selected by the driver is generated in the function key 6 to generate a microprocessor unit ( 5) is entered.

By the key signal from the function key 6, in the microprocessor unit 5, the charge ratio / overcurrent / overvoltage / overflow is determined by information on the determined voltage level and current value of the battery or the temperature of the motor battery or the temperature of the controller. Outputs a display signal to indicate the function selected by the driver during pre / overheat.

For example, when the driver selects the "charge rate", the microprocessor unit 5 displays the measured voltage and current values of the battery in a ROM table (not shown) built in the microprocessor unit 5. Compared with and determines the charge ratio of the battery and outputs a display signal for displaying this.

That is, since the experimental values of the voltage and current values according to the charging ratio of the battery are recorded in the ROM table, the measured value is compared with the experimental values recorded in the ROM table to determine the charging ratio of the battery.

As another example, when the driver selects "overcurrent" or "overvoltage", the microprocessor unit 5 compares the measured current value or the voltage level with the predetermined current value or the set voltage level of the measured battery. When the set current value or the set voltage level is exceeded, a display signal for displaying an "overcurrent" or "overvoltage" state is output.

As another example, when the driver selects "over-discharge", the microprocessor unit 5 compares the measured voltage or current value of the battery with a predetermined set voltage or set current value so that the measured voltage or current value of the measured battery is equal to the set voltage or current. If it is lower than the set current value, it outputs a display signal to indicate the "over-discharge" state.

As another example, when the driver selects "overheating", the microprocessor unit 5 compares the measured motor battery temperature and the controller temperature with a predetermined set motor battery temperature and a set controller temperature to compare the measured motor battery with the result of the comparison. When the temperature or the temperature of the controller exceeds the set motor battery temperature or the set controller temperature, a display signal for displaying the "overheat" state of the motor battery or the controller is output.

On the other hand, a display signal from the microprocessor unit 5 displays information on a function selected by the driver among charge ratio, overcurrent, overvoltage, overdischarge, and overheating, and indicates the corresponding function. The lamp lights up.

For example, on the display window of the LCD 7, the charge ratio of the battery is displayed numerically in accordance with the display signal from the microprocessor unit 5, while the overcurrent or overvoltage or overdischarge state of the battery or the motor battery or controller The overheating state is displayed in the form of letters or figures.

As described above, according to the present invention, the battery voltage and current, the temperature of the motor battery and the controller are detected and amplified, and the converted digital signal is processed by the microprocessor unit, and the output signal corresponding to the function key is output. By displaying on the LCD, there is an excellent effect to check the battery for sure.

Claims (2)

A battery management system comprising: an amplifier for amplifying the detected signal after detecting a current and voltage of a battery, a temperature of a motor battery, and a temperature of a controller; and a current and voltage signal of a battery among the signals amplified by the amplifier. A multiplexer for sequentially selecting and outputting an output, an analog-to-digital converter for converting a signal sequentially selected and output by the multiplexer into a digital signal, and a motor battery temperature signal and a controller temperature signal among the signals amplified by the amplifier Charge ratio or overcurrent of the battery by a temperature converter converting the signal into a DC type signal having a voltage level corresponding to each sensed value, and then sequentially outputting the selected signal; and a signal applied from the analog-to-digital converter and the temperature converter. Or overvoltage or overdischarge conditions and overload of the motor battery or controller A battery comprising a microprocessor unit for determining a state and outputting a display signal for displaying information selected by a driver by pressing a function key, and a display unit for displaying information corresponding to a display signal from the microprocessor unit. Management system. The battery management system according to claim 1, wherein the display unit comprises a liquid crystal display element and a lamp for displaying information corresponding to the display signal.