The development of electric vehicles is inseparable from the innovation of the battery. In many articles, there is a problem that the battery's battery life, the inconvenience of charging is inconvenient. When we complain, the electric car battery technology is really not going before? In fact, it is not the case, big manufacturers are constantly innovating the battery quality and capacitance of electric vehicles. There are several batteries in the market: lead-acid batteries, phosphate phosphate cells, lithium iron phosphate batteries, lithium cobalt cells, and three-dimensional lithium batteries, and the battery life of electric vehicles has also been improved, then What is the specific situation of battery technology now?Lead-acid battery: your most common battery
Lead-acid batteries
The lead-acid battery is the most common battery in the week. The main advantage is that the voltage is stable, the price is cheap, but there is also a problem such as low, short service life and frequent maintenance. In China, the application of lead-acid batteries in low-speed electric vehicles in China is very common. In addition to the advantages mentioned above, the price of such batteries is lower than other batteries. The lead-acid battery has a series of 2V, 4V, 6V, 8V, 12V and 24V, with capacity from 200mAh to 3000mAh. Then count the discharge of the lead-acid battery, there is a formula, which can be used to calculate: Rated capacity ¡Á discharge capacity magnification ¡Á [1+ temperature coefficient ¡Á (ambient temperature-25)] / discharge current = long. Although the lead-acid battery is low, the battery's battery life is relatively low. Therefore, the electric car is completely supplied from this battery to the energy is not too appropriate.
Phosphate ferrite, battery: BYD battery technology
Phosphate ferrite
Recently, Wang Bifu, Chairman BYD said that BYD's latest phosphate lithium-phosphate lithium battery breaks through the energy density limit of traditional lithium iron phosphate batteries, reaching the three-dimensional material level, while cost control is more excellent than ordinary lithium iron phosphate And have been applied to BYD electric vehicles, and the battery life has been greatly improved.
This kind of battery is applied to the electric car in BYD Qin. This battery is an improved type under the lithium phosphate route, called phosphate phosphate, which is to add manganese elements in the material. The energy density of such a battery has reached the density of the ternary material. During the battery life, it is more durable than the current lithium iron phosphate battery, and since there is no exact price message, it is temporarily not compared.
Lithium iron phosphate battery: another choice for electric vehicle battery
Lithium iron phosphate battery
Lithium iron phosphate batteries belong to a lithium ion secondary battery, mainly used as a power battery, and its discharge efficiency is higher, and the charge and discharge efficiency can reach more than 90%, while the lead-acid battery is approximately 80%. In the battery, the safety of lithium iron phosphate batteries is higher than that of other batteries, the theoretical life can reach 7-8 years, and the actual service life is approximately 3 to 5 years, and the performance price is more than 4 times more of the lead-acid battery than theoretically. .
Let's talk about it, the price of lithium iron phosphate batteries is higher than other types of batteries, and the battery capacity is small, the mileage is short, and it is basically not recycled after retirement, and there is no recycled value. In summary, the application of a phosphate iron battery in electric vehicle will increase the overall cost, and the battery is not recyclable, which will cause waste and consumption of resources.
Sith lithium cobaltate: Tesla's exclusive battery
Sith lithium cobalt acid
The battery of the Tesra Electric vehicle adopts the NCA series (Ni -CC aluminum aluminum system) of the Panasonic 18650 cobalt-cobaltate, and the single battery capacity is 3100 mA. Tesla adopted a strategy of the battery pack. The battery cell of 85KWH Model S used 8142 18650 lithium batteries. Engineers first distributed these batteries, and the average allocation of these batteries finally formed a whole battery pack, and the battery pack is located in the body bottom plate. .
The lithium cobaltate battery has a structural stable, high capacity ratio, and has poor comprehensive performance, but is equipped with a difference and cost is very high, mainly for small and medium-sized electrical cores, nominal voltage 3.7V. Tesla combined such a battery, the security became a question that needs attention, and Tesla engineers are distributed to each section of the battery pack to each section of 18650 cobalt acid lithium battery, each section 18650 Both of the lithium cobaltate cells have a fuse. When the battery excessive or current is too large, the fuse is cut off to avoid the entire battery pack due to an abnormal condition of a certain battery (too hot or too much). Then, in this point, the lithium cobaltate battery is inherently defect, but the safety of the engineer of Tesla is basically ignored. Obviously, such a solution is still very suitable for development in pure electric vehicles.
Article from: http://www.brcpower.c Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
