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Depth analysis of battery capacity test method

Return Listsource:Gratene date: 2022-06-17

Depth analysis of battery capacity test methodThe battery capacity problem is the problem that the user is very concerned. The business says that the capacity of a battery is reliable. Today, today’s lithium battery manufacturers come with everyone to analyze the battery capacity test method, we can test the battery capacity:

The self-discharge and polarity of the battery is gradually vulcanized by lead-acid batteries, but with the increasingly stringent requirements of product materials and processes, such as lead-to-lead bond alloy is a lead calcium alloy, and gradually become “” Who is free of maintenance. Some people are accustomed to using the voltage files that use the voltmeter or the multimeter to check whether the battery’s storage is sufficient, which is unreliable. Since even the battery of the power is activated, as long as the discharge is stopped, the positive and negative electrode plate and the electrolyte of the battery can be immediately reached, and the potential difference between them can be restored, each monogram 2.1V, the entire battery is about 12.6V or more. When the voltage is measured on a single measurement, the current is extremely small, so it does not generate a large pressure drop in the inside of the battery, so the display voltage is not low, but if a considerable load, such as a headlight (10 ~ 15A), the speaker (6 ~ 12A), the battery will make the lights, the hoarse, thus showing insufficient storage.

When the electrolyte liquid is too low, the two small balls will fall to the limit position. At this time, the observation holes are “outer red inner colorless” (the center is colorless and transparent, surrounded by a red ring), indicating Insufficient electrolyte, indicating that the battery cannot continue to use and must be replaced. If this detection is put on the dry reservoir, distilled water must be added. The English description is marked as “AddDistilledwater”.

The battery is a large-scale components that have a long life of 3 to 4 years. It is 1 ~ 2 years, and the more often driving the car (especially long-distance use), the longer the battery life; Cars or buss that are often parked, often discharged but charge, and battery life is shorter.

Battery Working Principle: When charging is charged with external electrical energy to regenerate internal active substances, store electrical energy as chemical energy, and then turn chemically converted into electrical energy output when discharging. When the battery is low, the electrolyte density is too low, the blue ball is sinking to the limit position, then the observation hole exhibits “inner infrared colorless” (the center is red dot, the surrounding colorless transparent ring), indicating the battery The loss is serious, and it must be charged immediately, and the English will be “chargingnecessary”.

Analysis of the daily maintenance method of the battery:

First, measure the floating charge voltage method

Second, the capacity measurement method

Third, internal resistance or conductivity test

Fourth, traditional offline capacity test method

This detection method measures the accurate value of the battery’s capacity and can clear whether the battery is a failure battery. However, this method has the following defects:

1. The battery must be separated from the system. If the city is suddenly interrupted during this period, the other set of batteries can be standing? Increase the risk of system paralysis.

2, the bulky electric wire requires multiple people to carry, and at least one person must measure the data.

3. Individual battery-side voltage may suddenly fall below the cutoff voltage during both measurement intervals, resulting in excessive discharge, as shown in Figure 3. The workload is too large, it is difficult to fully carry.

4, the whole set of batteries will take more than 20 hours, sometimes offline rectifiers, and is easy to cause a few batteries.

5, you must consume a lot of electrical energy and thermal energy.

V. Traditional online capacity test 

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