Can the energy density of the power lithium-ion battery really determine the quality of electric cars?

Tác giả ：Iflowpower – Добављач преносних електрана

A friend considers buying an electric car (no way, persuading it is not listening), in the process of accompanying the car, the author found that the salesperson began to use the energy density of the battery as an advocacy. "This car energy density is as high as XXX", "battery brand is XXX" speech, usually speak from the sales consultant of the electric car. When I asked, when I was energy density, the sales consultant did a few seconds, and said: "Simply, the energy density is higher, the better the car, the country has more subsidies!" It is very clear, energy Density this, even some car sales consultants are not too clear.

In fact, some new products and new technologies are promoted, and there is almost in all industries. But what these new stations use to do? How much value is there? After the consumers are wrapped around the cloud, it seems that it is not very concerned about these problems. I only feel that this thing is really a cow.

Namuhla sikhuluma ngobuningi bamandla ebhethri, ukuthi ungakanani umthelela kukhwalithi yezimoto ezihlanzekile zikagesi. Is the energy density? First of all, we simply understand the battery energy density is something. Ukuminyana kwamandla kuhlukaniswe kabili, ukuminyana kwamandla esisindo kanye nokuminyana kwamandla evolumu.

The current reference is the weight energy density, which calculates the formula: weight energy density = battery capacity ¡Á discharge platform / weight, unit is WH / kg (Watt / Kik); and the volume of energy density calculation is required to change the "weight" of the above formula to "volume", the unit is WH / L (watt / liter). Kalula nje, ukuminyana kwamandla kuwukuhlola umthamo wokugcina amandla ebhethri. And such evaluation, it was not to determine the standard of good or bad electric vehicles, but the policy requirements for the company's power lithium-ion battery power storage capacity.

According to the requirements, the company needs more than 300 watts / kg in the 2020 lithium-ion battery monomer, and the system is more than 260 watts / kg. Ngokombono wokumaketha, njengoba lokhu kuyindinganiso yokuthuthukiswa kwenqubomgomo, ngokuqinisekile iyathandeka kubathengi, ngakho-ke isibe yi-plummer ohlelweni lokuthengisa izimoto ezihlanzekile zikagesi. The evaluation of energy density is not fully mature, and the evaluation of energy density is not absolute fair, because this and car companies are straight.

Sesike sasho ngaphambili, futhi inqubomgomo izodinga ukuminyana kwamandla, futhi amandla angelinye lamazinga okubhekisela kuwo mayelana nokusekelwa kwamandla amasha. Uma kuphezulu ukuminyana kwamandla, kuyanda ukuxhaswa kwamandla amasha. This has led to a "arms race" in the power lithium-ion battery, and there are still many cats.

To understand how the car enterprise improves energy density, it has to say from the formula just now: weight energy density = battery capacity ¡Á discharge platform / weight. To increase this formula, the final value is two, one is to increase the battery capacity, and the other is to reduce the weight of the battery. Indlela yokukhulisa umthamo webhethri kuwumkhuba kanembeza.

There are many kinds of large-scale capacity, and the most is from the battery material. At present, the three-dimensional lithium-ion battery is the highest power lithium-ion battery type in China, while the phosphate iron battery is very fast. Kodwa-ke, umkhuba kanembeza awunayo into enhle ezandleni zomuntu ongenampilo, ukuze kwandiswe umthamo webhethri, abanye abakhiqizi baye behlisa izidingo zokuzinza kwebhethri, futhi izingozi zokuphepha zanda.

Ngakho-ke, kukhona abangaphakathi embonini, futhi umthamo webhethri muhle kakhulu, sizothinta ukuphepha kwezimoto zikagesi. Another way is to mitigate the overall weight of the entire dynamic lithium-ion battery, which is actually not cured. Some high-quality power lithium-ion batteries have a separate cell in each battery pack to fail to fail to affect the entire battery pack.

To reduce the weight of the dynamic lithium-ion battery, it is the first to rush to these cells. Either develop a new material allows it to reduce weight without affecting the protection of the battery, or a material that is straight down on the material or lighter but poor intensity. Ngakho-ke, kunezindlela eziningi zokwengeza ukuminyana kwamandla.

Relevant car companies, cutting materials is a "win-win" approach, and security issues are of course 60 tons. In the case where there is no uniform requirement for the structure and material of the battery, the safety and quality of high energy density is in qualifying, good or excellent level, and consumers are unparalleled. Write in the last actual, the simplest and rude approach, or the total capacity of the battery.

If you want to consider the factors of battery safety, the quality of the vehicle, the electric car is still a penny, which is still a penny. Ukukhuluma ngokuqondile, ngokuvamile, noma intengo yemoto inquma okuhle. If the relevant part can improve the fairness of the electric vehicle assessment standards, it is very positive for the progress of stimulating technology and the protection of consumer right.