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Flooded batteries are large in volume, relatively heavy, and high in price. They are suitable for use in vehicles carrying heavy loads.

Dry batteries are small in volume, relatively light, and moderately priced. They are suitable for use in vehicles carrying light loads.

Flooded batteries have a large capacity, while dry batteries have a small capacity.

The electrolyte in flooded batteries will decrease after being used for a period of time, and it is necessary to add electrolyte to restore them to normal. During the usage process, gas (mainly hydrogen and oxygen) will be generated to some extent, which easily leads to an increase in the internal pressure of the battery and causes the electrolyte to leak out and corrode external parts.

Dry batteries can be used until they are completely worn out without the need to refill the electrolyte. Generally, they are mainly lithium-ion batteries (such as mobile phone batteries).

Fault Inspection and Handling

If a set of batteries (3 batteries) are deformed simultaneously, first conduct a voltage inspection. If the voltage is basically normal, the voltage of each cell should also be measured to determine whether there is a short circuit. If there is no short circuit, it indicates that the deformation is caused by "thermal runaway" due to overcharging. The charging parameters of the charger should be carefully checked. If the voltage is on the high side (above 44.7V) and there is no overcharge protection or the trickle conversion current is low, it is required to replace the charger.

If only 1 or 2 batteries in a set of batteries (3 batteries) are deformed, the following faults may occur:

(1) The battery capacities are inconsistent, and some batteries may be overcharged during charging, resulting in deformation. The reasons for inconsistent capacities may include the existence of short-circuited cells, or users may have conducted test discharges or the batteries may have self-discharged, etc.

(2) Some batteries have irreversible sulfation of the plates, an increase in internal resistance, and deform due to heat generated during charging.

(3) Some batteries are connected in reverse during wiring, resulting in heat generation and deformation during charging. Check the discharge capacity and self-discharge performance of the undistorted batteries. If there is no abnormality, it does not belong to a battery problem.

Solutions

(1) Add as much liquid as possible on the premise of ensuring no leakage to prolong or avoid the occurrence of "thermal runaway".

(2) Avoid internal short circuits or micro short circuits and the tendency of micro short circuits.

(3) During the usage process, prevent over-discharge from occurring and store the batteries with full charge.

(4) Strictly check the charger to ensure that there is no serious overcharging phenomenon.

(5) When charging at high temperatures, it is necessary to ensure good heat dissipation of the storage batteries. Cooling measures should be taken or the charging time should be shortened. Otherwise, charging should be stopped.

It depends on personal needs.

Dry batteries are maintenance-free batteries. Due to the structural advantages of maintenance-free batteries, the consumption of the electrolyte is very small, and basically no distilled water needs to be added during their service life. They also have the characteristics of being shock-resistant, heat-resistant, small in size, and having low self-discharge. Their service life is generally twice that of ordinary batteries. There are also two types of maintenance-free batteries on the market. For the first type, the electrolyte is added only once when purchased, and no maintenance (adding supplementary liquid) is required during use. For the other type, the electrolyte has already been added and sealed when the battery leaves the factory, and users cannot add supplementary liquid at all. Generally, a lead-acid storage battery is composed of positive and negative plates, separators, a casing, an electrolyte, and terminal posts. The chemical reaction during discharging relies on the active substances of the positive plate (lead dioxide and lead) and the active substances of the negative plate (spongy pure lead) under the action of the electrolyte (dilute sulfuric acid solution). The grid of the plates is made of lead-antimony alloy in traditional storage batteries, while it is made of lead-calcium alloy in maintenance-free storage batteries. The former uses antimony, and the latter uses calcium, which is the fundamental difference between them. Different materials will lead to different phenomena. During the usage process of traditional storage batteries, the phenomenon of liquid reduction will occur. This is because antimony on the grid will contaminate the spongy pure lead on the negative plate, weaken the back electromotive force in the fully charged storage battery, cause excessive decomposition of water, and a large amount of oxygen and hydrogen will escape from the positive and negative plates respectively, resulting in a reduction in the electrolyte. Using calcium instead of antimony can change the back electromotive force of the fully charged storage battery, reduce the overcharge current, slow down the liquid vaporization speed, and thus reduce the loss of the electrolyte.

Flooded batteries are a type of lead-acid storage battery. Because there is a relatively large amount of liquid in the battery, people usually call them "flooded batteries". The liquid in flooded batteries is relatively easy to lose, so they need to be replenished with water frequently, so they are also called maintainable batteries. These batteries are mostly used in cars and motorcycles, and their discharge current is relatively large. So they are also called traction batteries or starting batteries.

I use it on a tricycle.

Reply

Using liquid lead-acid storage batteries on tricycles is a bit better than using dry powder batteries. The high-current discharge performance of liquid lead-acid storage batteries is much better than that of dry powder storage batteries.

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