How to check the liquid level height of the electrolyte of an automotive battery?

The height of the electrolyte level can be measured with a glass tube, and the liquid level should be 10-15mm higher than the plate (or estimated by visual inspection).If the electrolyte is insufficient, distilled water should be added, and the electrolyte should not be replenished, otherwise the density of the electrolyte in the battery will be changed. However, if it is confirmed that the electrolyte deficiency is due to spillage, the electrolyte can be replenished appropriately.

Measuring the electrolyte density of a battery in a pure electric vehicle should be carried out in a fully charged state for the battery of an electric vehicle. The relative density of the electrolyte can be measured by a suction density meter or an optical testing instrument. The detection method for measuring the relative density of electrolyte with a suction density meter is as follows:

After properly pressing the rubber sac with your thumb, then insert the rubber straw of the density meter into the electrolyte, and then slowly relax your thumb to make the electrolyte suck into the glass tube. At this point, the scale at which the liquid level intersects the float is the relative density of the electrolyte. When measuring the relative density of the electrolyte, the temperature of the electrolyte must be measured at the same time in order to convert the relative density values of the measured resistance at different temperatures to the standard temperature (25).

The relative density of the battery electrolyte should be selected according to different use conditions, such as the electrolyte with higher relative density should be used in cold areas; The relative density of the electrolyte in the battery used in the same area in winter should be 0 percent higher than that in summer 02～0. 04。

The height of the electrolyte level of each single cell battery of the battery should be 10-15mm higher than the plate. When testing, use a glass tube with an inner diameter of 3-5mm, one end is vertically inserted into the liquid filling hole of the human battery, and offset with the protective plate of the plate, and the other end is blocked with a finger, using its vacuum, when the glass tube is lifted, the electrolyte is sucked into the tube, and the height of the electrolyte is the value of the electrolyte higher than the plate. When the electrolyte is insufficient, distilled water should be supplemented.

Unless it is known that the drop in liquid level is due to electrolyte spillage, sulfuric acid solution should not be replaced. This is because the normal drop in the electrolyte level is caused by the evaporation of electrolyte water and electrolysis. <>

During the use of the battery, the liquid level will gradually decrease due to the evaporation of water in the electrolyte and the electrolysis of water caused by overcharging. The liquid level is too low, and the exposed liquid surface of the plate is one of the important reasons for the vulcanization of the plate. The level check cycle varies from season to season.

Generally, it lasts for about half a month in winter and about a week in summer. There are three ways to check the liquid level height: ordinary asphalt rubber container battery, which can be measured with a glass tube; The transparent plastic container battery can be judged according to the liquid level height indication line on the container.

The liquid level should be between the two indicator lines; Some imported small cars can also observe and judge the liquid level height from the liquid filling hole. If the liquid level height is lower than the standard value, distilled water should be replenished in time, and cold boiled water, tap water, lake water, river water, sea water, etc. are not allowed to be replenished. <>

Hello, I am glad to answer for you, to detect the concentration of battery electrolyte can be detected by suction density meter or optical testing instrument. The method of detecting the density of electrolyte with a suction density meter: after pressing the rubber capsule appropriately with the thumb first, the rubber straw of the density meter is inserted into the electrolyte again, and then the thumb is slowly relaxed, the electrolyte is sucked into the glass tube, and the electrolyte in the glass tube is inhaled to make the float float prevail, and the scale of the intersection of the float and the liquid surface at this moment is the electrolyte concentration.

To check the electrolyte level of the battery, you only need to unscrew the lid of the liquid filling port, and you can see the liquid level in your fingers. It is required that between the upper line grid of the liquid level and the lower line grid of the liquid level, there can be no more or less.

In the process of discharging and charging, the battery mainly consumes water, and a little acid mist also loses a small amount of sulfuric acid. If the battery level is lowered, the concentration of sulfuric acid will be higher and higher. The correct way is to measure the specific gravity with a battery hydrometer frequently, and the distilled water should be supplemented with distilled water, and the battery water should be supplemented with battery water, so that the specific gravity of the battery liquid is always kept within the normal range.

The density of the electrolyte is an important indicator to judge the capacity of the battery. When measuring the density of the battery electrolyte, the battery should be in a steady state. After the battery is charged and discharged or filled with distilled water, it will be allowed to stand for half an hour before measurement.

By measuring the electrolyte density of each single cell battery, it is possible to determine whether the battery has failed. If there is a difference in density between a single cell battery, the battery is dead.

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There are many benefits to using electrolyte for cathode. First of all, the contact area between the liquid and the medium is large, and it is helpful to increase the capacitance. The second is the electrolytic capacitor made of electrolyte, which can withstand high temperatures and can pass wave soldering (and at the same time, the voltage resistance is also relatively strong.

In addition, the electrolytic capacitor that uses the electrolyte as the cathode can self-heal when the medium is broken down, as long as the breakdown current is not continuous. But electrolytes also have their drawbacks. First of all, it is easy to volatilize and leak in a high-temperature environment, which has a great impact on life and stability, and the electrolyte may be vaporized instantaneously under high temperature and high pressure.

Caused by increased volume**; The second is the ionic conductivity method used in the electrolyte, which has a very low conductivity, only the conductivity, the reciprocal of ohms) cm, which causes the ESR value (equivalent series resistance) of the capacitor to be particularly high.

Figure 4-155 Measuring method of glass tube.

2) You can also use the observation of the liquid level height indicator line method, as shown in Figure 4-156. The normal liquid level height should be between the two lines, and when the liquid level is too low, distilled water should be added to restore the correct liquid level height. Sulfuric acid solution should not be added unless the electrolyte is known to have spilled.

Figure 4-156 Liquid level height indication line method.

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1) The detection of relative density is easy to do, you only need to pour out more than 10ml of liquid, use a pipette to accurately extract 10ml, weigh it with an electronic scale (balance level), and calculate it to get the relative density (g ml). There is a difference in density between before and after charging.

2) The battery is composed of multiple single batteries, if a single battery lacks electrolyte, the overall performance is insufficient electrolyte, but due to the technological progress of modern lead-acid batteries, the acid is adsorbed and stored, shaking can not feel the sound of the liquid wandering, non-professionals are difficult to distinguish with the naked eye, if you want to judge whether the electrolyte is enough, you can try to add the electrolyte to the page, stay for a period of time to let it absorb naturally, if the absorbed liquid level is gone, it means that the electrolyte is missing.

1. The height of the electrolyte can be between the upper and lower lines on the battery.

2 The density of the electrolyte is gram cubic centimeter (at ambient temperature 20°).

with a detector).

There are 2 types of batteries: 1Maintenance-free 2. Maintainable There is a liquid level scale on the battery case. Density tester.

Using Taiwan Mazhi Haque QL-120G electrolyte density tester to detect the relative density value of the battery, LCD digital display direct reading tester, the operation is simple and fast.