What is the difference between power battery and normal battery?

1. Difference on application industries

Power batteries used in power electric vehicles, including traditional lead-acid batteries, nickel-metal hydride batteries, and emerging lithium-ion battery. These batteries have power-type power batteries (hybrid vehicles) and energy-type power batteries (pure electric vehicles); lithium batteries used in consumer electronics such as mobile phones and notebook computers, which are ordinary batteries. To distinguish the power battery for electric vehicles.

2. Different nature

A power battery is a battery that powers a transportation vehicle, generally compared to a small battery that supplies energy to a portable electronic device. An ordinary battery is a lithium metal or lithium alloy as a negative electrode material, and a no aqueous electrolyte solution is used. The primary battery and the rechargeable battery lithium-ion battery are not the same as the lithium-ion polymer battery.

3. Different discharge power

The power battery supports large current discharge and may reach 20 times capacity current; the ordinary lithium battery only supports 1 times capacity discharge, that is to say, an ordinary 2600 mAh ordinary battery, the maximum discharge current is 2600 mA. At the same time, the working voltage of the power battery is lower than that of the ordinary lithium battery. The charging voltage of the ordinary lithium battery is 4.2V, and the maximum charging voltage of the power lithium battery is about 3.65V. The nominal voltage of a normal lithium battery is 3.7V, and the nominal voltage of a power lithium battery is 3.2V.

The power battery is the power source that provides the power source for the tool, and refers to the battery that powers the electric car, the electric train, the electric bicycle, and the golf cart.

It mainly distinguished from a starting battery for starting a car engine. Valve-sealed lead-acid batteries, open-tube lead-acid batteries, and lithium-iron phosphate batteries are often used.

High energy and high power;

High energy density

Recycling of high-rate partial state of charge (HRPSOC);

Wide operating temperature range (a 30 ~ 65 ° C);

Long service life, requiring 5-10 years;

Safe and reliable.

Automobile and motorcycle industry. Mainly to provide power for the ignition of the engine and the use of in-vehicle electronic equipment;

Industrial power system. It is used for power transmission substations, providing closing current for power units, providing backup power for public facilities and power supply for communication;

Electric vehicle and electric bicycle industry. It replaces gasoline and diesel as a driving power source for electric vehicles or electric bicycles.

Lithium battery

Lithium-ion battery is a new green high-energy chemical power source that launched by American Yongbian Company after 2000 and has successfully marketed. It shows excellent performance in electronic equipment and electric toys that - used in high-energy and high-power power supplies. Performance. When the medium discharge current is above, the discharge time of the lithium-ion battery can reach about 6 times that of the alkaline manganese battery; compared with the nickel hydrogen battery, the discharge voltage platform has a significant advantage in storage time.

In general, lithium-ion batteries have the following outstanding advantages:

1. Interchangeability with alkaline manganese battery can exchanged with alkaline zinc-manganese battery in any use

2. It has longer working time and higher and flat working voltage, especially above medium current discharge

3. Environmentally friendly green power; do not use any toxic substances such as mercury, chromium, and lead;

4. Storage performance is good; the placement period can be as long as 10 years.

Battery model: LFB14505 (AA)

Discharge capacity: greater than 2700mAh (at 1000mA discharge current)

Discharge voltage: ~1.45V (at a discharge current of 200mA)

Storage life: 10 years

Nickel-metal hydride rechargeable battery

Since the cadmium in the nickel-cadmium battery (Ni-Cd) is toxic, the waste battery is complicated to handle and the environment is polluted, so it will be gradually replaced by a nickel-hydrogen rechargeable battery (Ni-MH) made of a hydrogen storage alloy. In terms of battery power, the same size nickel-metal hydride rechargeable battery is about 1.5 to 2 times higher than nickel-cadmium batteries, and has no cadmium pollution. It has been widely used in various small portable electronic devices such as mobile communication and notebook computers. . Nickel-metal hydride batteries -synthesized with hydrogen ions and metallic nickel. The electricity reserve is 30% more than that of nickel-cadmium batteries. It is lighter than nickel-cadmium batteries, has a longer service life, and is environmentally friendly. At present, a larger capacity nickel-metal hydride battery has used in gasoline/electric hybrid vehicles. The nickel-hydrogen battery can used for rapid charge and discharge. When the vehicle is driving at a high speed, the electricity generated by the generator can be stored in the vehicle. In the battery, when the car is running at a low speed, it usually consumes a lot of gasoline than the high-speed driving state. Therefore, in order to save gasoline, the on-board nickel-hydrogen battery can used to drive the electric motor instead of the internal combustion engine, thus ensuring the normal running of the car. Save a lot of gasoline.

Lead-acid batteries

Nickel-cadmium battery

Nickel-metal hydride battery

Iron nickel battery

Sodium-nickel chloride battery

Silver zinc battery

Sodium-sulfur battery

Lithium battery

Air battery (zinc air battery, aluminum air battery)

Fuel cell A fuel cell is a device that converts chemical energy directly into electrical energy. Its positive electrode is an oxygen electrode and its negative electrode is a fuel electrode such as hydrogen or hydrocarbon or ethanol. The catalyst catalyzes reduction of oxygen in positive electrode, and conducts electrons from the external circuit to the reaction site of the oxygen electrode. the oxidation reaction of the fuel in the negative electrode catalyzes the conduction of electrons from the reaction site to the external circuit; the electrolyte transports ions generated by the reaction between the fuel electrode and the oxygen electrode, And block the transmission of electrons. The electrons work through the external circuit and form an electrical circuit. As long as the fuel and oxygen continuously supplied from the outside of the apparatus, the discharge product continuously discharged from the apparatus (hydrogen-oxygen fuel cell).

Solar battery

Super capacitor

Flywheel battery

Sodium-sulfur battery. The theoretical specific capacity of sodium-sulfur battery can reach 760 Wh/kg, which has actually reached 300 Wh/kg, and the charging duration is long and the cycle life is long.

The reaction material of negative electrode is molten sodium in negative electrode chamber, and reaction material of positive electrode is molten sulfur in the positive electrode cavity. These positive and negative electrodes are sealed with a α-Al 2 O 3 electrical insulator. There is a β-NaAl11O17 ceramic tube electrolyte between positive electrode chamber and negative electrode chamber. Electrolyte can only conduct ions freely, while electrons are insulators. When external circuit turned on, negative electrode continuously generates sodium ions and emits electrons, electrons move to positive electrode through external circuit, and sodium ions generate sodium sulfide through reaction material ofβ-NaAl11O17 electrolyte and positive electrode.

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