Automatic voltage internal resistance tester

How it works:

The working principle of automatic voltage internal resistance tester is usually based on the following methods:

Dc discharge method: By discharging or charging a battery or capacitor for a short time, and measuring the change in voltage and current, the internal resistance is calculated according to Ohm's law.

Ac disturbance method: An AC disturbance signal of known frequency and amplitude is applied to the battery, and the internal resistance is calculated by measuring the phase difference between voltage and current.

Time constant method: Measures the time it takes for the battery voltage to drop to a certain percentage at a specific current, using the relationship between the time constant and the battery capacitance and internal resistance to calculate the internal resistance.

Resonance method: Using LC resonant circuit, measure the resonant damping of the battery at the resonant frequency, so as to obtain the internal resistance value.

Four-wire method: By using four test lines （two for current and two for voltage measurement）， the influence of test line resistance on measurement results is reduced to improve measurement accuracy.

Functional features:

High Precision measurement: The automatic voltage internal resistance tester can accurately measure the internal resistance and voltage of a battery or power supply, usually with milliohm level of measurement accuracy.

Intelligent processing: The built-in intelligent processing system of the device can automatically analyze the measurement results and provide intuitive data display and report generation functions.

Multi-parameter measurement: In addition to internal resistance and voltage, some advanced devices can also measure battery capacity, charge and discharge performance and other parameters to provide a comprehensive battery performance assessment.

Easy to operate: The device usually has an intuitive operation interface and simple operation flow, which is convenient for users to quickly get started and use.

Data storage and transmission: With the data storage function, it can save a large number of measurement results, and support data export and transmission, which is convenient for subsequent analysis and processing.

Application field:

Power product development and production: In the development and production process of power products, automatic voltage internal resistance tester can accurately measure the internal resistance of the power supply, so as to evaluate the performance and stability of the power supply. This is of great significance for ensuring the quality of power products and improving the user experience.

Electronic equipment maintenance: When the electronic equipment appears to change the pupil, the maintenance personnel often need to use the automatic voltage internal positive tester to detect whether the power supply is working normally, and the test is the internal light of the power supply. Maintenance personnel can quickly determine whether there is a problem with the power supply, and then locate the cause of the failure and repair.

Power system test: Power system as a core component of many equipment, its stability and load capacity is crucial to the performance of the entire system, automatic voltage internal resistance tester can accurately measure the internal resistance of the power system, so as to evaluate its load capacity and stability. This is of great significance to optimize the design of the power system and improve the performance of the system.

Lithium battery test: Lithium battery as a widely used battery type, its performance and safety has been concerned. The automatic voltage internal cathode tester can accurately measure the internal cathode of the lithium battery, so as to understand the degree of aging, capacity decay and safety performance of the battery. This is of great significance for the research and development, production and application of lithium batteries, and helps to promote the continuous progress of lithium battery technology and the expansion of application fields.