Battery charging test device

Abstract

The invention discloses a battery charging test device. The battery charging test device comprises a battery, a charging unit, a resistor, a multi-channel voltage data acquirer and a voltage data processing unit, wherein the resistor is connected in series between the battery and the charging unit; the multi-channel voltage data acquirer is used for respectively detecting voltages of the battery and the resistor; and the voltage data processing unit is used for converting voltage data which are acquired by the multi-channel voltage data acquirer into current data and storing a resistance value of the resistor. The battery charging test device has the advantages that: by connecting the resistor with a fixed resistance value in series and detecting the voltage of the battery and the voltages of two ends of the resistor which is connected in series to a charging loop and has the fixed resistance value, the defect of misjudgment of over-voltage of the battery caused by voltage fluctuation is overcome, so that data which are acquired in the whole charging process and discharging process are normal, and the data which are acquired in the recharging process are also normal; and errors of battery charging test data caused by the misjudgment of over-voltage of the battery due to series connection of an ammeter in the conventional charging mode are eliminated, and the accuracy of the test data is ensured.

Description

technical field [0001] The invention relates to a battery charging test device, in particular to a battery charging test device of a mobile terminal. Background technique [0002] In the traditional battery charging test, especially in the battery charging test of mobile electronic products, such as figure 1 As shown, the voltmeter 4 is connected in parallel to both ends of the battery 2 to measure the battery voltage, and the ammeter 3 is connected in series in the charging circuit, that is, between the charging unit 1 and the battery 2, so as to measure the charging current of the battery 2. Because when the mobile electronic product is charging, the voltage detection pin (VBATSENCE) of the baseband chip of the mobile electronic product needs to detect the voltage of the battery in real time, thereby judging whether the battery voltage is overvoltage, if the detection reaches the battery overcharge threshold Voltage, then execute the hardware shutdown action. However, si...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that the charging test method of the series ammeter in the prior art increases the loop impedance, thereby causing a misjudgment of the battery voltage overvoltage, and provides a battery charging test device. The voltage of the fixed resistance resistor overcomes the misjudgment of the battery voltage overvoltage caused by the voltage fluctuation, so that the battery charging can be accurately tested

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