Connection state detecting circuit, battery internal resistance detecting device and battery tester
A connection status and detection circuit technology, applied in the direction of measuring resistance/reactance/impedance, measuring devices, measuring electricity, etc., can solve problems such as battery damage, inability to perform online measurement, and affect battery quality and life, so as to improve accuracy, The effect of improving system integration and simple structure
Active Publication Date: 2015-06-10
ITECH ELECTRONICS NANJING
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Problems solved by technology
This method has been widely used in practice, but it also has some serious disadvantages. For example, its internal resistance detection can only be performed in a static or offline state, and online measurement cannot be performed, and high-current discharge will cause damage to the battery. Thus affecting the quality and life of the battery
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[0038] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0039] figure 1 The basic principle of the connection state detection circuit of the present invention is shown. Such as figure 1 As shown, the connection state detection circuit of the present invention includes a high-impedance AC signal source, a signal amplifier circuit, a rectifier circuit, and a comparison circuit; a DC-blocking capacitor is connected in series at the output end of the high-impedance AC signal source, thereby forming a high-impedance AC signal output unit; the output impedance of the high-impedance AC signal source is much greater than the internal resistance of the battery to be tested. The state detection unit includes a signal amplifying circuit, a rectifying circuit, and a comparing circuit connected in sequence, and a DC blocking capacitor is connected in series at the input end of the signal amplifying circuit. The entire...
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The invention discloses a connection state detecting circuit for detecting whether a response signal detection terminal of a battery tester is connected with a detected battery. The connection state detection circuit comprises a high-resistance AC signal output unit and a state detection unit, wherein the high-resistance AC signal output comprises a high-resistance AC signal source of which the output end is connected in series with a first blocking condenser; the output impedance of the high-resistance AC signal source is more than the inner resistance of the battery to be detected; the state detection unit comprises a signal amplification circuit, a rectifier circuit and a comparing circuit which are sequentially connected; a second blocking condenser is connected in series with the input end of the signal amplifying circuit; the comparing circuit is used for comparing the output voltage of the rectifier circuit with the preset threshold voltage and outputting the comparison result. The invention further discloses a battery internal resistance detecting device, a battery tester and a control method thereof. With the adoption of the connection state detecting circuit, the parameter detection accuracy of the battery can be effectively increased.
Description
technical field [0001] The invention relates to the technical field of electrical detection, in particular to a connection state detection circuit and a battery internal resistance detection device for detecting the connection state between a battery internal resistance detection device and a battery under test. Background technique [0002] The use of batteries is very common now, and it is increasingly urgent to accurately and quickly detect and maintain batteries. Most battery manufacturers need to control and detect the internal resistance and voltage of the battery sheet during battery production, and even match the battery. The internal resistance of the battery is recognized as the decisive parameter for judging the capacity of the battery. The internal resistance of the battery The detection device can cooperate with battery manufacturers to quickly detect in the production line. Therefore, the battery can be evaluated by measuring the internal resistance of the bat...
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Login to View More IPC IPC(8): G01R31/00G01R27/14G01R31/36
Inventor 不公告发明人
Owner ITECH ELECTRONICS NANJING