An instrument for measuring the internal resistance of a battery
Introduction. Battery internal resistance is one of the important indicators to evaluate the performance and status of the battery.
An instrument that measures the internal resistance of a battery is a device used to measure the internal resistance of a battery in a circuit, which can provide accurate internal resistance values to help people evaluate the health and performance of the battery.
This article will introduce a commonly used instrument for measuring the internal resistance of batteries, as well as its working principle and applications.
1. Instrument introduction.
The instrument is a multi-functional battery internal resistance tester, which adopts circuit design and digital processing technology, and has the characteristics of high precision, high stability and high reliability.
The instrument can measure the internal resistance of DC power supply, battery, lithium battery and supercapacitor, and is widely used in power supply manufacturing, battery production, electronic instrument maintenance and other fields.
Second, the working principle.
The working principle of the instrument is based on the measurement of voltage and current.
First, the instrument injects a current into the cell to be tested through an internal current source and simultaneously measures the voltage of the battery.
Then, the instrument calculates the internal resistance value of the battery according to Ohm's law, and finally displays the result on the meter.
Specifically, the instrument measures the voltage of the battery under test by changing the magnitude and direction of the injected current by connecting the battery under test with an internal current source and voltage measurement circuit.
According to Ohm's law, the internal resistance of a battery can be calculated by measuring the ratio of voltage and current.
The measured value is converted into an internal resistance value by means of an internal calculation program and displayed directly on the instrument.
Third, the field of application.
The instrument has a wide range of applications, mainly including the following aspects.
1.Power supply manufacturing.
In the power supply manufacturing process, measuring the internal resistance of the battery is an important indicator to evaluate the performance and quality of the battery.
By using this instrument, the internal resistance of the battery can be quickly and accurately measured, allowing the health and performance of the battery to be assessed.
At the same time, the abnormal internal resistance of the battery can be found in time to avoid the entry of bad batteries into the market.
2.Battery production.
In the battery production process, measuring the internal resistance of the battery is an important means to judge the quality of the battery.
With this instrument, a comprehensive internal resistance test of the battery can be carried out, so as to screen out qualified battery products.
At the same time, the test data can be recorded and saved to provide a basis for quality traceability and quality control.
3.Electronic instrument repair.
In the process of electronic instrument maintenance, it is often necessary to test the internal resistance of the battery to judge the working condition and health status of the battery.
With this instrument, the internal resistance of the battery can be measured quickly and accurately, providing valuable reference information for maintenance personnel to help them quickly locate and resolve faults.
Epilogue. An instrument that measures the internal resistance of a battery is an important tool used to evaluate the performance and condition of a battery.
The circuit design and digital processing technology used in the instrument have the characteristics of high precision, high stability and high reliability.