How to properly check the battery voltage

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The battery is an indispensable part of the car and can be divided into traditional lead-acid batteries and maintenance-free batteries. The lead-acid battery is composed of positive and negative plates, separators, shells, electrolytes and wiring pile heads. The chemical reaction of the discharge depends on the active material of the positive electrode plate and the active material of the negative electrode plate in the electrolyte (dilute sulfuric acid solution). The process is carried out in which the grid of the plates is made of lead-bismuth alloy. Moreover, compared with the conventional battery, it has the advantages of no need to add any liquid, and has a long storage time for the wiring pile head. Therefore, the voltage detection of the battery can not be ignored.

Let's take a look at the steps to check the battery voltage.

When the battery voltage is detected, the vehicle should be at least at rest for 2 hours, and it will not start, load or unload within 2 hours.

When measuring the open circuit voltage between battery terminals with a battery tester, be careful to turn off the ignition switch. If the detected voltage is equal to or greater than 12.5V, this indicates that the battery is normal. But if the voltage is lower than 12.5V, then the owner is looking for a reason.

It is recommended that when testing, it is necessary to measure the battery voltage with a digital multimeter or a pointer multimeter. Because this measurement method has no load in the measurement circuit, the meter display value is not necessarily the actual voltage of the battery, so Causes inaccurate measurements.

The above is a small compilation of the method of checking the battery voltage, it is hoped that the above is useful to the owners. In fact, it is very useful to check the voltage of the battery of the car regularly, so that you can always know the safety of the car.

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Maintenance of Sumitomo hydraulic cylinder seals


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Daily maintenance and upkeep can effectively solve the sealing problem of hydraulic cylinders, extend the service life of hydraulic cylinders, and improve the work efficiency of construction machinery.
1. Regularly check the wear of the hydraulic cylinder seals, and if severe wear is found, it should be replaced in a timely manner.
2. Clean the hydraulic cylinder seals to prevent impurities such as dust and sand from entering the interior of the seals.
3. Use appropriate hydraulic oil and avoid using expired or non compliant hydraulic oil to avoid damage to the hydraulic cylinder seals.
4. Avoid using hydraulic cylinders under excessive pressure or load to avoid damage to the seals.
5. Regularly check the liquid level and pressure of the hydraulic cylinder to ensure its normal operation and avoid damage to the sealing components due to hydraulic cylinder failures.
6. When the hydraulic cylinder is stopped for a long time, regular maintenance should be carried out, such as applying anti rust oil, to prevent aging or deformation of the sealing components.


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