What is the difference between a dry battery and a "wet" battery?

Dry battery, small size, easy to use, has a certain explosion risk, cannot be charged, low price.

Lithium battery, small size, now mobile phone charging treasure, etc., can be used for charging, there is a certain risk of explosion, and it can be charged and discharged at a high price.

Wet battery, large size, mainly used in batteries, such as car batteries, can be recharged, the price is relatively affordable.

The regular name of the dry battery is called “maintenance-free battery”. Compared with the traditional wet battery, the performance parameters are basically the same. In appearance, the maintenance-free battery has no screw cap filled with electrolyte, and no water maintenance is required in the normal service life.

On the ordinary liquid-filled battery, there are 6 (12V) caps for filling the electrolyte. During use, it is necessary to regularly check the height of the liquid in the battery and replenish the electrolyte at the appropriate time.

First, the advantages and disadvantages of liquid filled batteries

The advantages of liquid-filled battery: strong instantaneous current discharge capability, strong power and strong load capacity;

Disadvantages of liquid-filled batteries: poor endurance, poor deep discharge capability, and poor deep cycle life.

Second, the advantages and disadvantages of dry batteries

The advantages of dry battery are: no maintenance in normal use, strong deep discharge capability, strong endurance and long deep cycle life;

The shortcoming of the dry battery is: the instantaneous large current discharge capacity is poor, it is not suitable for high power discharge, and there is a risk of thermal runaway.

First, lead-acid battery is divided into dry battery and wet battery.

Second, the difference between these two batteries is:

1) The dry battery is a primary battery in a chemical power source and is a disposable battery. Since this chemical power supply device has an electrolyte that is a non-flowable paste, it is called a dry battery, which is said to be relative to a battery having a flowable electrolyte. You can add water to the bottle, but do not exceed the maximum water level, generally marked with a MAX line. Dry lead-acid batteries (such as automobile dry-charge batteries, motorcycle dry-charge batteries, etc.) should be replenished with distilled water for a period of time to maintain a density of 1.28 g/ml for dilute sulfuric acid electrolytes. There is no longer necessary to add distilled water for termination.

2) The wet battery is a lead-acid battery, which is formed by an aqueous acid water interpretation solution.

Generally speaking, 80% of the batteries are distinguished by color: white is the water battery, black is the dry battery; from the weight to distinguish the light is the water battery, the weight is the dry battery; from the appearance of the accessories to distinguish: the battery is added to the water screw Water, flat head is dry.

Third, lead-acid batteries are mainly divided into three categories:

1) Ordinary battery; the plate of an ordinary battery is composed of oxides of lead and lead, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantage is that the voltage is stable and the price is cheap; the disadvantage is that the specific energy is low (that is, the energy stored per kilogram of the battery), the service life is short, and the daily maintenance is frequent.

2) Dry-loaded battery: Its full name is dry-charged lead-acid battery. Its main feature is that the negative plate has 2V lead-acid battery

The higher storage capacity, in the completely dry state, can save the obtained electricity in two years. When using, just add the electrolyte and wait for 20-30 minutes.

3) Maintenance-free battery: Maintenance-free battery due to its own structural advantages, the consumption of electrolyte is very small, and it is basically unnecessary to supplement distilled water during the 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 also two kinds of maintenance-free batteries on the market: the first one does not require maintenance (adding replenishing liquid) after the one-time addition of electrolyte at the time of purchase; the other is that the battery itself has been charged with electrolyte and sealed. The user cannot add replenishing liquid at all.

Dry batteries are the opposite of "wet" (liquid) batteries. The earliest "volta" batteries were those in which two metals were placed in the same electrolyte as an electrode. Because there is inconvenience in the use of liquids, people later invented the "dry" battery, the principle is the same, just replace the electrolyte solution with a paste electrolyte, and seal it in the zinc barrel (zinc barrel as the negative electrode, middle copper). And the carbon rod is used as the positive electrode, and the paste electrolyte is filled between the positive and negative electrodes), so that the electrolyte does not flow out, and is convenient to use and carry, so it is called a dry battery.

Dry batteries are not completely "dry", and long-lasting dry batteries often have a leaky night, which becomes "wet".

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