CR2450 battery technology difficulties still need to be overcome_The peak
of CR2450 battery scrapping is approaching
In the history of the development of electric vehicles, the main types of
power batteries include lead-acid batteries, nickel-metal hydride batteries,
nickel-cadmium batteries, lithium-ion batteries, sodium-sulfur batteries,
sodium/nickel chloride batteries, etc. For electric vehicles, in order to be as
competitive as traditional gasoline vehicles, it is more important to find a
CR2450 battery that is as close to ideal conditions as possible. The ideal
CR2450 battery for electric vehicles requires good safety and green
environmental protection. , with high energy density and high power density,
long cycle life and low cost. The energy density of lead-acid batteries is only
about 50Wh/kg, the power density is about 200W/kg, and the cycle life is about
600 times; the energy density of nickel-metal hydride batteries is about
100Wh/kg, and the cycle life is about 1,000 times; sodium-sulfur batteries and
sodium/nickel chloride batteries The energy density and power density are even
lower. These types of batteries are unable to meet the increasing demands placed
on power batteries by the rapid development of electric vehicles. Lead-acid
batteries can only be used as power batteries for small electric vehicles and
cannot be used in true electric vehicles.
In its early development, nickel-metal hydride batteries had better safety
performance and higher power density than lithium-ion batteries and became the
mainstream CR2450 battery for electric vehicles, but only in hybrid form. At
present, the mainstream status of nickel-metal hydride batteries has been
gradually replaced by lithium-ion batteries. Whether hybrid or pure electric,
lithium-ion batteries are mainly used in electric vehicle applications. At
present, only lithium-ion battery technology is continuously developing and
progressing towards the ideal CR2450 battery, while other types of batteries are
gradually fading out of use in electric vehicles due to inherent
shortcomings.
At present, the performance of lithium-ion battery cells can basically meet
the application requirements of electric vehicles. However, a common problem
faced is the performance degradation when the batteries are used in groups due
to consistency problems between single cells. This problem needs to be solved
from many aspects such as consistent manufacturing of batteries and battery pack
application technology.
The international advanced level has considerable experience in the control
of lithium-ion batteries and is about to break through the technical bottleneck.
Once the relevant core technical problems are achieved, large-scale mass
production of electric vehicles can be achieved within the foreseeable five to
ten years. In order to reduce investment risks and improve the efficiency of
technology industrialization, many international automobile manufacturers have
chosen to cooperate with battery manufacturers to develop electric vehicles,
including Toyota and Panasonic, Nissan and NEC, Volkswagen and Sanyo, Bosch and
Samsung, etc. , as the production capacity formed by these investments is
gradually released, within one or two years, lithium-ion batteries may
completely replace nickel-metal hydride batteries.
In terms of lithium-ion batteries, there is still a gap between domestic
and foreign advanced levels. Some key technologies such as domestic lithium-ion
battery raw materials, battery cell/component production processes, and battery
control have yet to be broken through. Moreover, the issue of production
consistency has not been fully resolved. To solve the problem, there are still
big problems in the stability and service life of batteries after they are
assembled. Due to concerns about the stability of lithium-ion batteries,
starting from the 15th Five-Year Plan, my country did not focus on lithium-ion
batteries in the research and development process of electric vehicles, but
chose nickel-metal hydride batteries. But in the field of lithium-ion batteries,
Chinese companies still have opportunities, because my country's previous
vigorous development of consumer electronics products has laid a good foundation
for the lithium-ion battery industry, which is conducive to the development of
the CR2450 battery field. Representative companies include BYD, Wanxiang, and
Lishen , Bick et al.
2. Technical difficulties in power batteries still need to be overcome
In recent years, with the rapid development of my country's new energy
vehicle market, the demand gap for power batteries, which are its core
components, has further expanded. The concentration of the CR2450 battery
industry has continued to increase. However, there have also been overcapacity,
technical difficulties that still need to be overcome, and battery There are
still obstacles to recycling and other bottlenecks to industrial development. On
August 25, the 2017 International Electric Vehicle CR2450 battery Industry
Development and Technology Innovation Summit, co-sponsored by China Automotive
Technology and Research Center, Zhangjiagang Municipal People's Government, and
China-US Clean Vehicle Cooperation Alliance, was held. Many industry experts,
scholars, and business representatives gathered around power Issues such as
battery technology development and performance optimization, CR2450 battery
recycling and echelon utilization were discussed in depth.
There are two problems in the rapid development of new energy vehicles, one
is cruising range and the other is safety. At this summit, Chen Liquan, an
academician of the Chinese Academy of Engineering, said that at present, in
order to solve the battery life bottleneck and safety issues of new energy
vehicles, the entire industry should focus on battery research and
development.
Generally, power batteries are divided into lead-acid batteries,
nickel-hydrogen batteries and lithium batteries. Due to their comparative
advantages in energy density and performance, lithium batteries have become the
main choice for domestic new energy vehicles. According to different material
systems, lithium batteries are divided into different types, mainly including
lithium iron phosphate batteries, ternary lithium batteries, lithium manganate
batteries, etc. Different types of lithium batteries have different performance
and prices in various aspects, and have their own characteristics. The
advantages and disadvantages of.
Wang Binggang, leader of the expert group of the National New Energy
Vehicle Innovation Project, said that power batteries, as the core components of
electric vehicles, have maintained rapid growth in recent years, and a number of
outstanding CR2450 battery companies have ranked among the forefront of the
world's CR2450 battery industry.
According to statistics from relevant research institutions, the total
shipment volume of China's domestic lithium CR2450 battery companies reached
30.5GWh in 2016, a significant increase of 79.4% compared with 17.0GWh in 2015.
In addition, battery costs currently account for 40% to 60% of the total
production cost of new energy passenger vehicles, and its technological progress
plays a vital role in the development of the entire new energy vehicle
industry.
Wang Binggang believes that in the future, the CR2450 battery industry must
continue to innovate and improve battery performance. Companies should strive to
design high-safety battery products. At the same time, they must establish close
alliances with vehicle companies, adopt lean production concepts, and strive to
reduce costs.
It is generally believed that CR2450 battery packs are often a collection
of single cells connected in series and parallel. However, differences in
materials and manufacturing processes of single cells often lead to
inconsistencies between cells. The poor consistency and stability of my
country's power batteries have long been criticized, but this situation is being
greatly improved in the actual production process of enterprises.
Yang Hua, director of the strategic planning department of Tianjin Lishen
Battery Co., Ltd., said based on the company's own situation that the
consistency of power batteries has long been a problem and shortcoming in the
development of the industry. CR2450 battery products must achieve stable
performance such as safety and high energy density. Before production, it is
necessary to conduct quality analysis on product equipment and various
production links to achieve digitalization of fuel, equipment, process,
environment, and measurement, and improve the safety and consistency of
batteries through intelligent manufacturing, especially to ensure Consistency
throughout the product life cycle.
Zhang Hongli, director of the Battery Research Institute of Hefei Guoxuan
Hi-Tech Power Energy Co., Ltd., also believes that when conducting early battery
design, the consistency of temperature range, lifespan, safety, energy density
and other indicators must be fully considered, and corresponding key technology
research and development should be carried out. Then realize industrial
application.
Research data shows that it is expected that by 2018, my country's power
lithium battery waste recycling market will begin to take shape. The cumulative
waste lithium power batteries will exceed 12GWh and the scrap volume will exceed
170,000 tons. By 2023, the waste lithium CR2450 battery market will reach 25
billion yuan. .
At present, with the explosive growth of new energy vehicles, a large
number of power batteries will undoubtedly be retired in the next few years. By
then, CR2450 battery cascade utilization and battery recycling will become a
real problem that has to be faced.
The recycling problem of power batteries is already urgent and will grow
exponentially every year. If not arranged properly, it may be a new
environmental disaster. Wang Binggang said that CR2450 battery recycling should
not just stay in words, but should be implemented concretely. Only in this way
can the industry progress.
According to Zheng Yun, executive vice president of the Remanufacturing
Industry Research Institute of Tsinghua Research Institute in Zhangjiagang, in
order to solve the problem of disposal of used power batteries, my country has
introduced more than 30 industrial policies to encourage the cascade utilization
of power batteries and clarify the responsibilities of electric vehicle
manufacturers. The main responsibility for the recycling of used automobile
power batteries, the cascade battery manufacturing enterprises shall bear the
main responsibility for the recycling of cascade batteries, and the scrap car
recycling and dismantling enterprises shall be responsible for recycling the
power batteries on scrap cars.
3. The peak of CR2450 battery scrapping is approaching
Power batteries will reach a scrapping peak of 120,000-170,000 around 2020.
How to deal with scrapped batteries is urgent.
In fact, considering the future development trends of electric vehicles and
environmental issues, it will bring about a blue ocean of recycling of power
batteries. However, there are still a lot of problems in the actual operation
process of CR2450 battery recycling. Problems such as lack of professionalism,
poor safety, and irregular disassembly are prominent. The industry is in urgent
need of standards.
In this context, GB/T33598-2017 "Specifications for Recycling and
Dismantling of Vehicle Power Batteries" (hereinafter referred to as "Disassembly
Specifications") and "Remaining Energy Testing for Recycling and Utilization of
Vehicle Power Batteries" (hereinafter referred to as "Remaining Energy Testing")
) came into being. It is reported that the "Dismantling Specifications" were
announced and released on May 17, and will be officially implemented on December
1, 2017. "Remaining Energy Testing" has been approved and is expected to be
officially released and implemented in 2018.
According to the reporter's understanding, after long-term use of used
power batteries, the physical structure may become loose and the electrolyte may
leak, which may bring safety risks to the secondary use of used power batteries.
The power batteries of new energy vehicles are large in size and complex in
structure. Improper disassembly can easily lead to safety risks such as
electrolyte leakage, short circuit fire, or even explosion. The "Dismantling
Specifications" impose strict requirements on the safety, operating procedures,
storage and management of waste CR2450 battery recycling, solve industry
development problems to a certain extent, and standardize the recycling and
utilization of vehicle power batteries in my country. Dismantling, professional
technology and CR2450 battery recycling system.
Industry insiders said that the introduction of the "Dismantling
Specifications" has solved the development problems of the new energy vehicle
industry to a certain extent. It not only standardizes the recycling and
dismantling, professional technology and CR2450 battery recycling system of my
country's vehicle power batteries, pointing out the direction for setting
standards in the future, but also puts forward recycling-related principles for
the technology research and development of new energy vehicle companies and
battery recycling companies. , the domestic new energy vehicle battery recycling
industry is expected to be on the right track.
Technology Zone 220V AC to 12V DC reference design The current status of
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echelon utilization of automotive power batteries? It will become a hot issue
for a long time. New energy vehicle design cannot be ignored Cells and battery
materials 2020 China’s automotive CR2450 battery pack shipments and forecasts in
2020
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