Difference Between Alkaline Battery and Lead Acid Battery
Alkaline battery
Excellent varieties in zinc manganese battery series
Alkaline battery, also known as alkaline dry battery, alkaline zinc manganese dioxide battery and alkaline manganese dioxide battery, is the best variety of zinc manganese battery series. It is suitable for large discharge capacity and long time use. The internal resistance of the battery is low, so the current generated is larger than that of ordinary carbon batteries. Because such batteries do not contain mercury, they can be disposed of with domestic waste without deliberate recycling.
Alkaline battery is a successful high capacity dry battery and one of the batteries with cost performance ratio. The alkaline battery uses manganese dioxide as the positive electrode, zinc as the negative electrode, and potassium hydroxide as the electrolyte. It is superior to carbon battery in characteristics and has large capacitance. The chemical formula is: Zn+MnO+HO → Mn (OH)+ZnO.
The alkaline battery is structurally the opposite electrode structure of ordinary batteries, which increases the relative area between the positive and negative electrodes. In addition, ammonium chloride and zinc chloride solutions are replaced by highly conductive potassium hydroxide solutions. The negative zinc is also changed from flake to granular, which increases the reaction surface area of the negative electrode. In addition, high-performance electrolytic manganese powder is used, so the electrical performance is greatly improved, The capacity and discharge time of alkaline batteries of the same model are 3-7 times that of ordinary batteries, and the difference between the two is greater at low temperature. Alkaline batteries are more suitable for continuous discharge of large current and electric field combination with high working voltage requirements, especially for cameras, flash lamps, razors, electric toys, CD players, high-power remote controllers, wireless mice, keyboards, etc.
Alkaline battery Shopping Guide
Alkaline battery is not familiar to many people in China, but it has begun to occupy the market at a surprising speed. Its main advantage is its durable power, which is generally seven times that of ordinary batteries. In addition, its initial recovery time is short, and it is most suitable for camera flash. The output is stable and does not leak, so some advanced electronic products such as BP machines, remote controls, electronic cameras, etc. must use alkaline batteries. In addition, there is a small secret: alkaline batteries are generally marked with donotr charge (non rechargeable) for safety reasons. In addition, alkaline batteries that are “exhausted” can recover a certain amount of power after being placed for a period of time, so intermittent use of alkaline batteries can have a longer working time. The alkaline battery can be identified by whether it is printed with the word “ALKALINE” or “alkaline battery” in Chinese.
Electrode reaction formula
The positive pole is cathodic reaction:
MnO+HO+e－=MnO(OH)+OH－
MnO (OH) has a certain solubility in alkaline solution
MnO(OH)+HO+OH－=Mn(OH)－
Mn(OH)－+e－=Mn(OH)2－
The negative electrode is anodic reaction:
Zn+2OH－=Zn(OH)+2e－
Zn(OH)+2OH－=Zn(OH)2－
The total battery reaction is:
Zn+MnO+2HO+4OH－=Mn(OH)2－+Zn(OH)2－
matters needing attention
(1) Do not charge the battery, which may cause leakage or danger.
(2) Pay attention to the battery polarity to prevent incorrect installation.
(3) Do not short-circuit, heat, put into fire or attempt to disassemble the battery.
(4) Do not mix old and new batteries.
Lead acid battery
Mainly made of lead and its oxides
Lead acid battery (VRLA) is a kind of battery whose electrode is mainly made of lead and its oxide, and the electrolyte is sulfuric acid solution. In the discharge state of lead-acid battery, the main component of positive electrode is lead dioxide, and the main component of negative electrode is lead; In charging state, the main components of positive and negative electrodes are lead sulfate.
The nominal voltage of a single cell lead-acid battery is 2.0V, which can be discharged to 1.5V and charged to 2.4V; In application, six single cell lead-acid batteries are often used in series to form a 12V nominal lead-acid battery, as well as 24V, 36V, 48V, etc.
French Plante invented the lead-acid battery in 1859, which has experienced nearly 150 years of development. The lead-acid battery has made great progress in theoretical research, product types and varieties, electrical performance and other aspects. The lead-acid battery has played an indispensable role in transportation, communications, electricity, military, navigation, aviation and other economic fields. According to the difference in structure and use of lead-acid batteries, batteries are roughly divided into four categories: 1. lead-acid batteries for starting; 2. Lead acid battery for power; 3. Fixed valve regulated sealed lead-acid battery; 4. Other types include small valve regulated sealed lead-acid batteries, lead-acid batteries for miner’s lamps, etc.
The nominal voltage of a single grid lead-acid battery is 2.0V, which can be discharged to 1.5V and charged to 2.4V. In application, 6 single cell lead-acid batteries are often used in series to form a 12V nominal lead-acid battery. There are also 24V, 36V, 48V, etc.
Main characteristics
Safety seal
During normal operation, the electrolyte will not leak out from the battery terminals or housing. No free acid
The special suction partition keeps the acid inside, and there is no free acid inside the battery, so the battery can be placed at any position.
Air release system
When the internal pressure of the battery exceeds the normal level, the VRLA battery will release excess gas and automatically reseal to ensure that there is no excess gas in the battery.
Simple maintenance
As the gas recombination system converts the generated gas into water, no water is required during the use of VRLA batteries.
Long service life
The lead calcium alloy fence VRLA battery with corrosion resistant structure can be used for floating charge for 10-15 years.
Stable quality and high reliability
With advanced production technology and strict quality control system, VRLA battery has stable quality and reliable performance. Voltage, capacity and sealing shall be 100% inspected on the line.
Security certification
All VRLA batteries have passed UL safety certification.
Product application
emergency power supply
*Telecommunications
*Solar system
*Electronic switch system
*Communication equipment: base station, PBX, CATV, WLL, ONU, STB, cordless telephone, etc
*Backup power supply: UPS, ECR, computer backup system, Sequence, ETC, etc
*Emergency equipment: emergency light, fire alarm and burglar alarm, fire gate
Main power supply
*Communication equipment: transceiver
*Electric control locomotive: collection vehicle, automatic transport vehicle, electric wheelchair, cleaning robot, electric vehicle, etc
*Mechanical tool starter: grass cutter, bridge trimmers, cordless electric drill, electric screwdriver, electric sledge, etc
*Industrial equipment/instrument
*Camera: flash, VTR/VCR, movie light, etc
Other portable devices, etc
conclusion
The main difference between lead-acid batteries and alkaline batteries is that lead-acid batteries are rechargeable, while alkaline batteries are mostly non rechargeable. A battery is a device that has one or more electrochemical batteries.