How to judge the benchmark value of the battery internal resistance tester?

If the internal resistance of the battery is higher than 50% or higher of the 100% reference value, the battery should be replaced. It is recommended to contact the manufacturer if the internal resistance is 25% to 43% above the benchmark value. At levels above 43%, it is load tested.

Some people think that all the data (new or good performance) is concentrated around the benchmark value, and that the data obtained in the later tests is reasonably close to any trend curve. In other words, high-capacity batteries have a uniform low internal resistance, while low-capacity batteries have a proportionally higher internal resistance.

But to the disappointment of these people, even a new battery produced under strict control is unlikely to meet these characteristics. In the process of self-testing, it will be found that there are some large-capacity batteries with very high internal resistance. Similarly, a normal battery with low-impedance characteristics cannot be tested for capacity.

Unfortunately, in the current state of the art, it is not possible to completely distinguish between these irregular batteries by testing the impedance, conductance, admittance and resistance without the help of load testing. If the user is fortunate enough to have a large amount of battery capacity and the corresponding internal resistance data, it is easy to establish a set of benchmark values to complete the above work of identifying these irregular batteries. When this benchmark value is just beginning to be established, or there are only a few special types of batteries, some of the approximate data can be selected as the benchmark value.

The ZY-DN battery internal resistance tester is a digital storage multi-functional portable tester that quickly and accurately measures the operating state parameters of batteries. The instrument monitors the voltage and internal resistance of the single battery, stores and processes the monitored data, alarms the battery failure, and accurately and effectively determines the excellent condition of the single battery. The instrument saves, queries, deletes, and exports the test data.

The host computer software processes the imported data, analyzes and displays the data through various charts, and automatically generates the test report of the battery.

HDGC3915 battery internal resistance tester adopts the AC discharge test method developed by our company, which can accurately measure the terminal voltage and internal resistance value of the battery and estimate the capacity, and judge the quality of the battery, the quality of the technical state and the budget life. Customers can choose two operation modes according to their own situation: button operation and LCD touch. It can be used to measure batteries in groups or in individual cells.

Product application, acceptance test of new battery grouping; The internal resistance matching test is carried out before the old battery is reassembled; Daily test: track the change of the internal resistance of the battery, and grasp the deterioration of the battery at any time. Check the use of discharge before and after discharge, and find the change value of internal resistance before and after discharge to judge the backward battery.

"Intelligent battery tester", also known as battery internal resistance meter or battery fast capacity tester, is a portable digital storage test instrument that quickly and accurately measures the state of health and charge of the battery and the connection resistance parameters. The instrument can display and record the voltage, internal resistance, capacity and other important parameters of a single or multiple groups of batteries, accurately and effectively pick out the backward batteries, and can generate test reports with computers and special battery data management software, track the decay trend of the battery, and provide maintenance suggestions. It is suitable for the maintenance and inspection of batteries for communication base stations, substations and UPS.

It is used for battery acceptance, battery assembly and routine inspection. The test speed is fast, a set of 108-cell battery pack test only takes 10 minutes Small size, light weight, portable handheld operation. High-precision** test using AC injection method, fully automatic range conversion, and large-capacity data storage.

The battery internal resistance tester adopts single-chip microcomputer control, digital parameter setting, LED digital display, intuitive and clear, and higher accuracy; The macro battery internal resistance meter is not only beautiful and lightweight, but also gives an out-of-tolerance alarm and eliminates human error; Moreover, when the internal resistance tester is tested, the internal resistance of the battery will be tested. Mold.

Temperature: 0 -50.

Size: 300 250 100 (mm).

Weight:. Fuse Protection: 250V fast-acting fuse.

Display: Digital Manuscript Style.

Measurement frequency: 1kHz 5% square wave.

Maximum voltage: must be less than.

Battery Internal Resistance Test Method:

1. According to the physical formula R=U I, the test equipment allows the lithium battery to pass a large constant DC current in a short time (generally 2 3 seconds) (at present, a large current of 40A and 80A is generally used), measure the voltage at both ends of the lithium battery at this time, and calculate the current internal resistance of the lithium battery according to the formula;

2. Measure the open-circuit voltage of the battery: U1 battery is connected in parallel at both ends of a fixed resistance resistance: R, and discharged;

3. Measure the voltage at both ends of the battery during the discharge of the lithium battery: U2; Calculate the internal resistance of the battery: r=(u1-u2) u2 r);

4. For example, if the open-circuit voltage of a battery is 12V, and the voltage drops to 10V after connecting a 10 ohm resistor in parallel, the internal resistance of the battery is: r=(u1-u2) u2 r)=(12-10) 10 10)=2 ohms;

5. Under normal circumstances, the larger the internal resistance r of lithium battery, the worse the battery with load, and the internal resistance r of high-power batteries (such as batteries) is usually very small. Low-power batteries (e.g., 9V tandem batteries) usually have a relatively large internal resistance.

1.Please operate in strict accordance with this manual, and it is strictly forbidden to operate in violation of regulations or barbaric operations.

2.Attention should be paid to moisture-proof and fireproof during product storage.

3.The illustrations and descriptions in this manual may be slightly different from the actual product, please refer to the actual product. 1.Non-maintenance personnel or authorized maintenance personnel are not allowed to repair without authorization!

2.Dismantle and repair without the permission of the company, and the warranty will automatically expire!