The hottest lithium battery in China must be stron

2022-07-29
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China's lithium batteries must be stronger and bigger in the future. In 2015, the installed capacity of wind power exceeded 145million kW and that of photovoltaic exceeded 43million kW. It is a pity to abandon the wind, the light and the disease. In 2015, the new power vehicle market was booming, with an annual output of 340000 vehicles, but the concern about the battery function of electric vehicles remained. Recently, I had an exclusive interview with Professor Qi Lu, a doctoral tutor in the new power information and Technology Laboratory of Beijing University, to talk about hot topics in the industry such as energy storage and power batteries

focus on the energy storage operation of remote people without electricity

: in terms of energy storage, Japan is at the forefront of the world. Do you think the authorities should give policy or subsidy support

Qilu: although it started early and took the lead in the world in the storage technology, in Japan, because its power is extended to every household, household photovoltaic power generation is widely used, and the generated surplus power enters the power at any time, so the utilization of energy storage is really small. But in China, we are growing large-scale, centralized and clean power generation in open places such as the wilderness. Because of the intermittency of the scenery, instantaneous power has a great impact on electricity. In Japan, 80% or more households have their own roofs, so the impact of home-based photovoltaic power generation on electricity is inconsistent with that of centralized power generation

for the energy storage industry, policy subsidies should be determined according to market actions. In addition, I hope that the country can support fundamental research and practice basic skills

: in China, the growth of centralized photovoltaic has a blow to electricity, and the growth of separate self owned roofs is very rare. How to solve the problem

Qilu: our achievements in dealing with household energy storage are concentrated on the people without electricity in remote areas. For example, about 700000 Tibetans and foreigners in Tibet have not been effectively powered on. The number of people without electricity in other remote areas, such as Yunnan, Guizhou, Sichuan, Xinjiang and Inner Mongolia, is also a large number

three years ago, we conducted photovoltaic power generation and energy storage experiments in dozens of Mu Yi people in Erenhot, Inner Mongolia. The results show that, in addition to heating and electricity, electricity can be supplied for cooking, refrigerator, television, electric welding and cutting, cattle and sheep milking, etc. The local authorities will subsidize 85% of the installed kilowatts per household. Every year, Mu Yi can save more than 10000 yuan due to the power consumption of diesel generators, household appliances, electric motorcycles, etc. The most important thing is to change the traffic jam, so that they can connect the world and appreciate the information

now we also have the intention to start cooperation with the Naqu local authorities in Tibet as the primary means of poverty alleviation. This is inconsistent with the previous view of photovoltaic poverty alleviation. In the past, photovoltaic poverty alleviation funds were intensively supported on a large scale, and the money was allocated to power generation enterprises. However, nomads and barbarians were too separated to really benefit from it

the performance and quality of power batteries need to be improved

: you are the first person to lay the foundation for the positive pole data of lithium cobalt oxide and lithium manganese oxide batteries in China. You are also the person in charge of the power battery project for electric vehicles for the 2008 Olympic Games, the 2010 WorldExpo and the 863 power lithium battery project for electric vehicles during the eleventh five year plan. What is the current situation of Zhonghua power battery after years of growth

Qilu: after I returned to China in 2000, I quickly built the first lithium cobaltate production line in China. It took me one year to break through the zero production of lithium cobaltate in China. Later, we developed and produced two major types of lithium batteries, one is a high-capacity lithium manganate battery, and the other is a high-power lithium battery with multi metal oxide composite materials. During and after the Beijing Olympic Games, 50 electric vehicles and hundreds of dissimilated power buses were ensured to operate safely and efficiently. It is suitable for small specimens and materials that do not produce large plastic deformation in the friction process

now the cost of lithium batteries has dropped sharply. Ten years ago, the gap of lithium batteries in China cost 30 or 40 yuan per square meter. Now both the positive and negative materials of lithium batteries are very cheap. It is said that the gap battery manufacturers have achieved twoorthree yuan. The rapid growth of lithium batteries also reveals the battery explosion and other Enron achievements. Lithium battery needs to be smaller, lighter, more reliable and cheaper in the next few years, and the whole vehicle technology of battery also needs to catch up with and surpass. I hope all industries can make lithium batteries stronger and bigger, instead of mentioning that Chinese culture is a synonym for inferior and cheap products

: how does the Ministry of industry and information technology view the suspension of ternary lithium batteries for passenger cars

Qilu: This is a bit overdone and two-sided. I have said for 10 years that ternary lithium battery is not suitable for pure electric vehicles, but it can be used in dissimilated electric vehicles. In the experiment, the heat of ternary lithium battery cannot be released quickly during rapid charging, which increases the explosive capacity

: what about the current technology of lithium iron phosphate

Qilu: the lithium iron phosphate technology has no future. Five years ago, lithium iron phosphate batteries accounted for the vast majority of the market, with a sharp increase over the past two years. However, the former has poor service life, poor safety film blowing machine after continuous upgrading, large volume and low energy density, and its function is inferior to that of ternary lithium battery

: the executive meeting of the State Council proposed to break through the intrinsic quality of power batteries. The Ministry of industry and information technology invested RMB 500million to establish a power battery R & D platform composed of nine enterprises

Qilu: these nine enterprises, except Tianjin Lishen, are all state-owned automobile manufacturing enterprises. Their specialty is to make cars, but breaking through the battery bottleneck requires their own talents. The accumulation of skills is not something that can be done with a huge amount of money

the target of future technology is lithium battery

: what do you think is the target of future power battery growth? With the explosive increase of power batteries, the acceptance and control of power batteries has also been put on the national agenda

Qilu: the target of power battery in the future is the high-power lithium battery using the positive electrode data of multi-element metal oxide in the dissimilatory power vehicle. On pure electric vehicles, the target should be spinel lithium manganate. Lithium manganate is used in Japanese pure electric vehicles. The reason why it is called spinel is that lithium manganate has different voltage and layout, so it will have different names. We have tracked the unsupported Central Art of spinel lithium manganate pushing samples instead of dragging samples for more than 20 years. After that, it will be introduced to the market from the first generation to the second generation and then to the third generation. For example, this art is used in the Olympic Games and the WorldExpo

other lithium air batteries are also under constant discussion. In the future, the target of the battery is still in the lithium battery circle, whether lithium is used as the positive or negative pole

after the power battery is used in electric vehicles, it can be accepted for energy storage operation, and then used as capital. For example, hundreds of electric buses put into operation in the Olympic Games will be used for wind power and photovoltaic energy storage after three years of operation. Finally, receive and receive as data for further manipulation

: graphene is very hot now, but many people think it is unrealistic

Qilu: graphene is a new material discovered in this century. It has good physical conductivity. It is reported that the graphene battery takes 8 minutes to charge and can travel 1000 kilometers. Charge in 8 minutes. Tomorrow's multi positive metal composite oxide battery can also be charged at the rate of 10C. From the data point of view, the graphene conducting motor can be good, but is it the same from the data to the battery and then to the electric vehicle

What does the

10c magnification mean? For a car that travels 100 kilometers, it needs at least 15 kW and 20 kW batteries. For a car that travels 1000 kilometers, it needs hundreds of kW batteries. If it is recharged with 10C, will it have a lot of power? Tomorrow's metropolis will not be able to do this. Although it is technically feasible, it can not be done in practice. For electric vehicles, we can't just look at the mileage. If a car is fully loaded with batteries and no people, what's the significance? Using a single volume or unit component of battery, which can drive a certain component of electric vehicles or energy density to describe the advanced nature of electric vehicles

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