Categories of batteries for new energy vehicles

Introduction New energy vehicle battery category Lithium iron phosphate battery Lithium iron phosphate battery is a lithium ion battery using lithium iron phosphate because phosphorus and iron are abundant on the earth and there will be no supply of materials.

Categories of batteries for new energy vehicles

Lithium iron phosphate battery

Lithium iron phosphate battery is a lithium ion battery that uses lithium iron phosphate as the cathode material. Phosphorus and iron are abundant on earth, so there will be some. no supply problems. Its theoretical working voltage is moderate (3.2V), large capacity per unit weight ((170MAH/G), high discharge power, fast charging and long life, and large stability at high temperature and high environment.

Advantages: increased safety, longer service life, contains no heavy metals or rare metals, supports fast charging, and has a wide temperature range

Disadvantages: poor performance such as vibration, low solid density and compacted density results in low battery energy density, material preparation and battery manufacturing costs.high ies, low battery efficiency, poor consistency and intellectual property issues.

Ternary lithium batteries

Ternary lithium batteries. The batteries use lithium-nickel-cobalt manganate as the positive electrode material and graphite as the negative electrode material. Energy density ranks first among all lithium battery technologies, with a maximum of 250 KWH/M3. The battery is very sensitive to temperature and will break down at around 250 KWH/M3. 200 degrees.

Advantages: high energy density and good cycle performance. Currently, the rated voltage has reached 3.7V and the capacity has reached or exceeded the level of lithium phosphate batteries. >Disadvantages: The high temperature structure is unstable, resulting in poor high temperature safety, and the high pH value can easily cause the monomer to form gas, whichi will cause danger. The current cost is high. Cell

The positive electrode of a hydrogen fuel cell is composed of air and oxygen, the negative electrode is hydrogen, and the medium is a separator and electrolyte. In principle, it is different from a lithium-ion battery and cannot do this. to be used. Loading.

Advantages: Very high energy density; hydrogen charging time is short. It only takes 5 minutes to charge the Japanese high-pressure fuel cell, and it can travel 500 kilometers. /p>

Disadvantages: Hydrogen is safe to use; storage and transportation costs are high; the technology is not industrialized and has not been verified by the market; it cannot be billed on the network. p>Representative models: BYD Song EV40Q, Ideal ONE, Geely Emgrand GSE, Tesla MODELS, BAIC Senova EV, etc.

Lithium-sulfur battery

The lithium-sulfur battery is a batteryie lithium battery with sulfur element as the positive electrode and lithium metal as the negative electrode

Advantages: The weight energy density is relatively high, reaching 300-350WH/KG, the cost is very low

< p>Disadvantages: the volume energy density is very low, the battery is light but relatively bulky; and there is a fatal problem: the polysulfur positive electrode will dissolve in the electrolyte, resulting in reduced life.

Nickel-hydrogen battery

The nickel-hydrogen battery is a positive electrode active material mainly made of nickel, and the negative electrode is made of nickel. An alkaline battery whose active material consists mainly of a hydrogen storage alloy is. a new green battery developed in 1960. Its founder is Stanford

Advantages: Large discharge, high energy density (long battery life) andlow heat generation.

Disadvantages: There is a memory effect and it is easy to decompose during the charging and discharging process. Overcharging and overdischarging cause more severe attenuation.

Not all new energy batteries are lithium batteries.

Lithium batteries are widely used in the field of new energy vehicles, but not all new energy batteries are lithium batteries. Currently, the power batteries used in new energy vehicles mainly include lithium iron phosphate batteries and ternary lithium batteries. Other types of batteries, such as lead-acid batteries and nickel-metal hydride batteries, are also used in some specific fields, but they are relatively poor in performance and environmental protection.onement, their field of use is therefore relatively limited. Generally speaking, lithium batteries are widely used in the field of new energy vehicles, but not all of them are lithium batteries.

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