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Energy density refers to the amount of energy stored in a certain space or mass of matter. Specifically, it refers to the amount of energy stored in a unit of space or mass of matter.
The unit of energy density is wh/kg, which is an important parameter to measure the power battery of automobiles. In the automotive power battery, the greater its energy density, the more power the power battery stores, and the relative mileage will also increase. Note: There are also factors such as motor power conversion and other factors.
As shown in the figure: the energy density of lithium iron phosphate is lower than that of ternary, resulting in a battery mass of 600kg less than the cruising range of ternary battery 500kg.
The latest news: Changan Automobile's solid-state battery will be gradually mass-produced and applied in 2025
Following the release of the self-developed battery brand "Golden Bell Jar" at the Guangzhou Auto Show, Changan Automobile's move in the battery field has attracted much attention from the industry.
On December 27, 2023, in the latest record of investor relations activities, Changan Automobile revealed the company's latest plan in the battery field.
Changan Automobile said that in terms of technical route, it will focus on breakthroughs in battery cell technology. Focusing on the modification of liquid battery materials and system optimization, we have carried out technical research, continuously improved the energy density of the battery, applied 3C at the charging rate, popularized 5C, pre-researched 7C, and achieved the fastest charging time of 7 minutes and a range of 400 kilometers. At the same time, we will deepen the development of new electrolyte materials and key processes for semi-solid-state and solid-state batteries, and actively develop leading solid-state batteries based on the needs of the whole vehicle, which will be gradually mass-produced and applied from 2025, with a weight energy density of 350-500Wh/kg and a volume energy density of 750-1000Wh/L, and will be fully popularized and applied in 2030. (Release time:2023-12-28 Source:Gasgoo)
As shown in the figure: assuming that the energy density of Changan solid-state battery reaches 400wh/kg, it is not difficult to see that under the same battery quality, its cruising range will be increased by at least 1 times. This is also the fundamental reason why automotive power battery companies vigorously develop solid-state batteries. "Electric vehicles work for power battery manufacturers", and power batteries account for about 40% of the value of electric vehicles.
It is expected that the technology of automotive power batteries will break through again, so that people can dispel the worries about the range of electric vehicles. When electric vehicles generally have a range of 1000KM, it is believed that it will be an important sign that the car will fully enter the electrification.
Xpeng Motors recently released: X9 can achieve the fastest charging of 10min, increase the cruising range of up to 300km of efficient energy supplement, ultra-long cruising range, with the ultimate charging efficiency, completely eliminate the anxiety of battery life.
Xpeng X9
In this article, the automotive knowledge explains: the important parameter index of power battery "energy density", I hope to help you understand.
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