KR20080078182A - Battery insect-discharge circuit reliability testing machine - Google Patents

Abstract

A machine for testing reliability on a battery charging/discharging circuit is provided to check the battery capacity of a plurality of models by selecting various kinds of loads. A voltage and current detection unit(30) is connected to a charger(10) and detects a voltage and current of the charger in applying power for measurement. A voltage adjusting unit(40) applies a set voltage to the voltage and current detection unit according to a command control signal. A display unit(50) displays normal or abnormal operation of a charging and discharging circuit of the charger and various operation modes by an operation control signal. A variable resistor regulates a load current applied to the voltage and current detection unit. An automatic/manual switching unit(LY) selects operations of the variable resistor or the voltage adjusting unit. A key input unit(60) includes various keys for setting a load current for adjusting an output voltage of the voltage adjusting unit and a reference voltage and keys for selecting the various operation modes. A microcomputer(70) outputs the operation control signal to the display unit according to a signal outputted from the voltage and current detection unit.

Description

Battery insect / discharge circuit reliability testing machine

1 is a block diagram showing a battery charge / discharge circuit reliability tester according to the present invention

FIG. 2 is a circuit diagram illustrating the configuration of the voltage / current detector and the voltage regulator of FIG.

3 is a view showing data of the voltage regulator;

The present invention relates to a battery charge / discharge circuit reliability tester, and more particularly, to a battery charge / discharge circuit reliability tester that is easy to adjust voltage and current, and to easily check a performance evaluation result according to load variation. .

Batteries have been developed along with the growth of the modern electronics industry, especially with the development of mobile systems such as laptops, mobile phones, etc., and are in an important position that determines the overall performance of electronic products.

In particular, in order to improve the portability of the mobile system, products are gradually miniaturized and lightened, and in order to achieve such miniaturization and light weight, the necessity of secondary batteries such as hydrogen ion batteries, lithium ion batteries, and lithium polymer batteries with high energy density is required. There is a great deal of attention, and as interest in environmental conservation increases, so does interest in environmentally friendly products.

Lithium ion secondary batteries can meet these requirements, and have many advantages, such as high energy density, high operating voltage, and excellent storage and life characteristics.

Since the secondary battery as described above can be repeatedly used after the charging process through the charger after discharge, whether or not the normal operation of the charge / discharge circuit of the charger acts as a factor that determines the reliability of electronic products such as mobile phones.

However, it is difficult to determine whether the battery is properly charged because it is difficult to check the operating characteristics such as the output power, the charge / discharge characteristics, and the load characteristics of the battery charger. There was a problem.

An object of the present invention for solving the above problems is to easily adjust the voltage, current and load of the battery charge / discharge circuit, and to easily check the measurement results to determine whether the normal operation of the battery charge / discharge circuit is automatic It is to provide a battery charge / discharge circuit reliability tester to be made to improve the productivity.

The present invention for achieving the above object will be described with reference to the accompanying drawings.

1 is a block diagram showing a battery charge / discharge circuit reliability tester according to the present invention, Figure 2 is a circuit diagram showing the configuration of the voltage / current detector and the voltage regulator of Figure 1, Figure 3 shows the data of the voltage regulator.

The battery charge / discharge circuit reliability checker according to the present invention is connected to the charger 20, the connection part 20, the voltage connected to the connection part 20, the voltage for detecting the voltage and current of the charger 10 when the power supply for measurement / Charge of the charger 10 by the current control unit 30, the voltage adjusting unit 40 for applying the voltage set to the voltage / current detection unit 30 according to the input command control signal, the input operation control signal A display unit 50 for displaying various discharge modes of the discharge circuit and the tester, a variable resistor VR for adjusting the load current applied to the voltage / current detector 30, and the variable resistor VR or It is possible to set the load current for adjusting the output voltage of the automatic / manual switching part LY and the voltage adjusting part 40 to select the operation of the voltage adjusting part 40, To set the reference voltage Is a key input unit 60 including keys for selecting various operation modes of the testers such as various keys and an automatic / manual switching mode, and a corresponding load according to signals output from the load current setting keys of the key input unit 60. Stores the current and outputs the corresponding control signal to the voltage controller 40 and records the reference voltage which is the reference of the positive judgment when the load current is applied, according to the signal output from the voltage / current detector 30 The microcomputer 70 outputs an operation control signal to the display unit 50.

In the above configuration, the connection part 20 is provided outside of a case (not shown) constituting the tester to easily connect the charger.

As shown in FIG. 2, the voltage / current detecting unit 30 is connected to the voltage adjusting unit 40 or the variable resistor VR and the base terminal, and the emitter and collector terminals are respectively connected to the + and-sides of the charger. Comprising a transistor (Tr) to be connected and the amplifier (AMP1) (AMP2) connected to the emitter and collector terminals, respectively, and the reference voltage and the measurement controlled by the voltage regulator 40 or the variable resistor (VR) According to the magnitude of the voltage, the energization of the transistor Tr is controlled to output a corresponding signal to the microcomputer.

The voltage controller 40 applies a voltage set to the voltage / current detector 30 according to an input command control signal, applies a clock to the clk terminal, and serial data through the SRI terminal. Digital analog converter (DAC) for transmitting the data to the output through the LD terminal, and an amplifier (LM741) connected in two stages to the output terminal (IOUT) of the digital analog converter (DAC). The digital-to-analog converter (DAC) is a 12-bit type of serial transmission method, and because it is a serial method, the interface is simple and advantageous to a circuit configuration, and the amplifier is configured in two stages to output a positive voltage. The data of one voltage regulator 40 is shown in FIG.

In addition, the display unit 50 displays the charging / discharging circuits of the charger 10 and various operation modes of the tester according to the input operation control signal, and the 7-SEGMENT installed on the outer circumferential surface of the case constituting the tester. It consists of a light emitting diode and a buzzer to display manual / automatic mode, operation mode and current / voltage setting value.

The automatic / manual switching unit LY for selecting the operation of the variable resistor VR or the voltage adjusting unit 40 uses a relay switch.

A plurality of keys constituting the key input unit 60 are also installed outside of the case, so that various load currents can be set to match the load of the charger, and reference voltages, which are the reference for the positive judgment according to the load current, can be set. It includes various keys to enable the selection of the various operating modes of the tester, such as automatic / manual switching mode.

In addition, the microcomputer 70 stores the load current according to the signal output from the load current setting keys of the key input unit 60 and outputs the corresponding control signal to the voltage adjusting unit 40. When the load current is applied, the reference voltage, which is a reference for the determination of the failure, is recorded, and the operation control signal is output to the display unit 50 according to the signal output from the voltage / current detection unit 30.

In addition, the tester has a communication port for communicating with an external device such as a computer.

The operation of the battery charge / discharge circuit reliability checker having such a configuration will be described below.

First, the voltage specification of the battery charge / discharge circuit reliability tester according to the present invention is the upper limit current: 700mA, the lower limit current: 600mA, the load upper limit voltage: 4.15 [V], the load lower limit voltage: 4.25 [V], the threshold voltage upper limit: 3.80 [V], threshold voltage limit: 3.40 [V], current rating is 160mA, voltage specification 4.25-4.08, LED is red, at 600mA voltage specification 4.25-4.08, LED is red, threshold current 600-700mA The LED is red and the LED is green when the full current is 100 -160mA.

Then, the load current and the reference voltage are set using the keys constituting the key input unit. As an example of the key configuration, the key 1 function: a mode setting function (up to 0-9), and the key 2 are 100 currents. Place setting. Key 3 is to set the digit of current 10, Key 4 is to set the digit of current 1, key 5 is auto / manual selection, key 6 is run function, key 7 is set value input function, key 8 is error check function, etc. do.

Mode 0-9 is shown in Table 1 above.

TABLE 1

In Table 1, the voltage / current meanings are as follows.

For 123-160ma current, the product is good if the voltage range is 4.0-4.2, for 160-600ma current, the product is good if the voltage range is 4.0-4.2, and if the voltage range near 670ma is 2.8-3.0.

The other meaning of voltage / current is good when the voltage range is 4.0-4.2 at 123ma current, good when the voltage range is 4.0-4.2 at 160ma current, good when the voltage range is around 4.0-4.2 at 600ma current, near 670ma current A voltage range of 2.8-3.0 indicates good quality.

In addition, the reliability checker of the present invention has its own error checking function, an example of which is shown in Table 2.

TABLE 2

The battery charge / discharge circuit reliability checker according to the present invention configured as described above can select various load types to check battery capacity of multiple models, have automatic and manual operation functions, and have a communication port at a long distance. In addition to collecting data, it is possible to systematically manage the data. The voltage and current of the load stage can be measured digitally, so that the characteristics of the charger can be easily measured.

Claims (3)

A voltage / current detector 30 connected to the charger 10 and detecting voltage and current of the charger 10 when the power supply for measurement is applied; A voltage adjusting unit 40 applying a voltage set to the voltage / current detecting unit 30 according to an input command control signal; A display unit 50 for displaying the charging / discharging circuits of the charger 10 and various operation modes of the tester according to the input operation control signal; A variable resistor VR for adjusting the load current applied to the voltage / current detector 30, and An automatic / manual switching unit LY for selecting an operation of the variable resistor VR or the voltage adjusting unit 40; It is possible to set the load current for adjusting the output voltage of the voltage adjusting unit 40, and various keys of the testers such as various keys and automatic / manual switching modes for setting the reference voltage which is a reference of the positive judgment at the time of the corresponding load current. A key input unit 60 including keys for selecting an operation mode, The load current is stored according to the signals output from the load current setting keys of the key input unit 60, and the corresponding control signal is output to the voltage adjusting unit 40. Battery charging / discharging circuit reliability, characterized in that consisting of a microphone 70 for recording the reference voltage to output the operation control signal to the display unit 50 in accordance with the signal output from the voltage / current detection unit 30 Checker. The method of claim 1, The voltage / current detector 30 includes a transistor Tr having a voltage regulator 40 or a variable resistor VR and a base terminal connected thereto, and an emitter and a collector terminal connected to the + and − sides of the charger, respectively. And an amplifier (AMP1) (AMP2) connected to the emitter and collector terminals, respectively. The method of claim 1, The voltage controller 40 applies a clock to the clk terminal, transmits serial data through the SRI terminal, and loads the data into an output through the LD terminal. A battery charge / discharge circuit reliability checker comprising: an amplifier (LM741) connected in two stages to an output terminal (IOUT) of a digital-to-analog converter (DAC).

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