Which is better for water and dry batteries?

Water batteries are a type of lead-acid battery. Because the liquid content in the battery is high, it is often called "water battery". The liquid in the water battery is relatively easy to lose, and it is necessary to replenish water frequently, so it is also called a maintainable battery. This kind of battery is mostly used in automobile and motorcycle, and the discharge current is relatively large, so also called the traction battery, start the battery.

A dry battery is a voltaic battery that uses an absorbent (such as wood chips or gelatin) to make the contents a paste that does not spill. It is often used as a power source for flashlight lighting, radio, etc. · After years of development, China's dry battery technology has made breakthroughs in energy, cycle life, high and low temperature adaptability. Zhiyan Data Research Center shows that China is gradually narrowing the gap with international leading technology, and has reached international level in some core technologies, and is increasingly entering the international market.

Which kind of electric car do you want to see, freight or travel? If it is freight, the space inside the car is enough, then it is necessary to install a large-capacity battery. The large-capacity dry battery will be very expensive. From the perspective of cost performance, it will choose water. If it is a scooter, it must be selected, and the dry battery is also divided into lithium battery and maintenance-free battery. The lithium battery is more expensive, and it is lighter. It is used on the mobile phone. It is not too high in capacity and volume. Maintenance-free can be done, that is to say, it is ok to choose the popular one in the market.

The dry battery is a maintenance-free valve-controlled battery, the outer casing is opaque, and the liquid is not visible when the filling hole is opened. Dry batteries are almost maintenance-free, saving effort!

The general outer casing of the water battery is transparent. The electrolyte inside can be seen from the outside. The general small capacity is the dry battery. The large capacity of 120AH or more is the water battery. The water battery is well maintained and has a longer service life than the dry battery. If the maintenance is not good, the service life is shorter than that of the dry battery! The key is to see how the user is maintained.

The most feared water battery is the lack of liquid. Regularly observe the liquid level of the battery. When the liquid is lacking, add distilled water or electrolyte in time (depending on the battery power, add electrolyte when the battery is obviously insufficient, and charge it in time), while maintaining the battery. Apply a small amount of grease (butter) to both ends of the battery + and - electrodes to prevent corrosion at both ends of the electrode and extend the battery life!

The specific differences are as follows:

The water battery is bulky and expensive, and is suitable for heavy cargo use;

The dry battery is lighter in size and moderate in price, and is suitable for light weight use.

The water battery has a large capacity and the dry battery capacity is small.

When the water battery is used for a period of time, the electrolyte will be reduced, and the electrolyte can be returned to normal. Due to the use of gas, the gas (hydrogen and oxygen) is likely to cause the internal pressure of the battery to increase, and the electrolyte will leak out of the external parts;

Dry batteries can be used until they cannot be used, no need to re-add electrolyte, generally based on lithium-ion batteries (mobile phone batteries are).

Fault checking and handling

A group of batteries (3) are deformed at the same time, and the voltage is checked first, if the voltage is basically normal. It should also measure the voltage of the single cell to determine whether it is short-circuited. If there is no short circuit, it means that the deformation is caused by overheating and "thermal runaway". The charging parameters of the charger should be checked. If the voltage is too high (above 44.7V), there is no overcharge protection or the turbulent switching current is low. It is required to replace the charger.

Only one or two of a group of batteries (3) are deformed, with the possibility of the following failures:

(1) The battery capacity is inconsistent, causing deformation caused by overcharging of some batteries during charging. If the capacity is inconsistent, there may be a short-circuit single cell, or the user may discharge the battery test or self-discharge.

(2) It is the irreversible sulfation of the plates in some batteries, the internal resistance is increased, and the charging is heated and deformed.

(3) When some batteries are connected, the reverse connection causes charging and heating deformation. Check the discharge capacity and self-discharge performance of the undeformed battery. If there is no abnormality, it is not a battery problem.

Solution

(1) Ensure that no more liquid is added under the premise of not leaking liquid to prolong or avoid the occurrence of "thermal runaway".

(2) Avoid internal short circuits or micro short circuits, and have a tendency to be slightly shorted.

(3) Prevent the occurrence of over-discharge during use and ensure that the power is stored.

(4) Strictly check the charger, and there must be no serious overcharge.

(5) When charging at high temperature, it must be ensured that the battery is well cooled. Cooling measures should be taken or the charging time should be shortened, otherwise charging should be stopped.

This needs to see personal needs.

Dry batteries are maintenance-free batteries. Due to their structural advantages, the maintenance-free batteries consume very little electrolyte and do not require supplemental distilled water during their service life. It also has the characteristics of shock resistance, high temperature resistance, small size and small self-discharge. The service life is generally twice that of a normal battery. There are two types of maintenance-free batteries on the market: the first one requires no maintenance (addition of replenishing liquid) during the one-time application of the electrolyte at the time of purchase; the other is that the battery itself has been charged with electrolyte and sealed off at the factory. The user cannot add replenishing liquid at all. The general lead-acid battery is composed of a positive and negative plate, a separator, a casing, an electrolyte and a terminal, and the chemical reaction of the discharge is based on the active material of the positive electrode plate (lead dioxide and lead) and the active material of the negative electrode plate ( Sponge-like pure lead) is carried out under the action of electrolyte (dilute sulfuric acid solution), wherein the grid of the plate is made of lead-bismuth alloy for the traditional battery, and the maintenance-free battery is made of lead-calcium alloy. Calcium, this is the fundamental difference between the two. Different materials will produce different phenomena: the traditional battery will reduce the liquid during use, because the flaw on the grid will contaminate the sponge-like pure lead on the negative plate, which will reduce the reverse of the battery after full charge. The electromotive force causes excessive decomposition of water, and a large amount of oxygen and hydrogen escape from the positive and negative plates, respectively, and the electrolyte is reduced. By replacing the strontium with calcium, it is possible to change the back electromotive force of the fully charged battery, reduce the overcharge current, and reduce the liquid vaporization speed, thereby reducing the electrolyte loss.

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