What is the cause of short circuit inside the lead-acid battery?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

The short circuit phenomenon of lead-acid battery is important as possible 1, the open circuit voltage is low, the closed circuit voltage (discharge) quickly reaches the termination voltage. 2, when the large current is discharged, the end voltage drops rapidly to zero. 3.

4, when charging, the voltage rises very slow, always keeps a low value (sometimes drop to zero). 5, when charging, the electrolyte temperature rise is very fast. 6, when charging, the electrolyte density increases very slow or almost no change.

7, when charging, no air bubble or taking gas is very late. The causes of short circuits caused by lead-acid storage batteries are: 1, the partition quality is not good or defect, allowing the polar active material to pass through, causing positive, negative plate virtual contact or direct contact. 2, the partition block is connected to the positive and negative plate.

3, the active substance is expanded from the active material due to excessive deposition of the active substance, resulting in positive and negative plates to connect to the deposits in the lower edge or side edges of the positive, negative electrode plates. 4, the conductive object falls into the battery, the negative plate is connected. 5.

The lead stream formed when the welding pole is not exhausted, or the lead beans are present during the positive and negative plate during the assembly, and the partition is damaged during the charge and discharge process. Below is important, the charging current is too large, the single battery charging voltage exceeds 2.4V, there is a short circuit or the lead-acid battery short circuit caused by short circuit or local discharge, temperature rise, and the valve failure phenomenon is analyzed.

Approach. 1, reduce the charging current, reduce the charging voltage, check if the safety valve body is blocked. Regular charging discharge.

The lead-acid battery floating voltage and discharge voltage in the UPS power system, many of which have been commissioned to the rated value during the factory, and the size of the discharge current increases with the increase of the load, and the load should be reasonably adjusted. For example, the number of applications of electronic devices such as computers. Under normal circumstances, the load should not exceed 60% of the UPS rated load.

Within this range, the battery does not excessive discharge. The lead-acid battery storage will lose part capacity due to self-discharge, and therefore, before the lead-acid battery is put into use, the residual capacity of the battery should be determined according to the battery's open circuit, and then supplement the battery to supplement the battery. Battery for standby shelves, supplementary charging should be performed every 3 months.

You can determine the battery's good or bad by measuring the puffy battery open circuit. 2, as an example of 12V battery, if the open circuit voltage is higher than 12.5V, it means that the battery energy is more than 80%, if the open circuit voltage is below 12.

5V, it should be replenished immediately. If the open circuit voltage is less than 12V, it means that the battery storage electrical can be less than 20%, the battery is unable. When the battery is short-circuited, the short circuit current can reach hundreds of amps.

The shorter contact is related, the larger the short circuit current, so all connecting parts will have a lot of heat, and the heat of the weak link is greater, the connection is blown, short-circuit phenomenon. The battery is partially possible to explorate the explosion, and the spark is caused when the connection is blown at the connection, which can cause the battery explosion; if the battery short circuit is shorter or the current is not particularly large, it may not cause connection The phenomenon is blown, but the short circuit will still have an overheating phenomenon, which will damage the binder around the connecting strip, so that it leaves a leakage. When installing the lead-acid battery, the tools should be used should take insulation measures.

When connecting, the electrical appliance other than the battery should be connected, and the inspection is not short-circuit, and finally the battery, the wiring specification should be good, prevent the overlapping pressure rupture. Through these meticulous work, it can better prevent lead-acid battery short circuits, so that the lead-acid battery is safer and longer.

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