Approaching the seven-day long holiday of the Spring Festival, for new energy car owners who want to return home or vacation for a long time, they must recall the fear of being dominated by endurance anxiety during the long holiday.
Everyone must remember the Shenzhen new energy car owner in the National Day holiday last year: he returned to Hunan from Shenzhen, and the originally expected 8-hour journey was almost 16 hours of time, for no other reason: the service area spent more than 5 hours before and after charging the car, and the owner was afraid of being cut in line within four hours of waiting for charging, and even the bathroom did not dare to go up, which was really human pain.
Power on? Power exchange? Or something else?
Although the matter is absurd, but it is by no means an isolated case, I believe that 100% of pure tram users have had the experience of queuing up to add electricity. Behind this reflects the most common and largest shortcoming in the use of new energy vehicles, one is that the battery energy is not enough, the mileage of full power can be driven is low; the other is the charging efficiency is low, and the charging time is too long. The application and development of science and technology on new energy vehicles has gone further, but the power battery itself has always been a constraint.
At present, improving the energy density of batteries, increasing the supporting of charging piles, and switching to power exchange technology are all different technical means to solve the endurance of new energy vehicles. More and more companies are using corresponding technologies: battery manufacturers continue to develop batteries with new material ratios, local governments and specific enterprises are building new public or private charging facilities, and more car companies have directly begun to build substations. In the face of many new energy vehicle energy replenishment technology paths, which way is the optimal solution?
Obviously, the above technical routes are necessary means and have formed a basic consensus in the industry, but they have not been able to fundamentally solve the problem, and their logic only keeps extending the endurance, while ignoring the most essential difference between charging stations and gas stations: energy replenishment speed. In guangzhou, 700 gas stations in Guangzhou can serve 3 million fuel vehicles, but the 2,300 charging stations in Guangzhou are still busy facing 300,000 new energy vehicles.
The pain point affecting the new energy replenishment is actually that the user waits for a long time, there is uncertainty in finding a charging pile, and its essential anxiety is still time. If the charging time of electric vehicles is shortened to almost the same as refueling, then in theory, the endurance anxiety of new energy vehicles will no longer exist.
Perhaps this is almost an impossible task now, but there is a Chinese company called "Juwan Technology Research" that is walking on this road.
Supercharge batteries specialize in getting rid of anxiety
This company is the first mixed-ownership high-tech private enterprise incubated by GAC Group, which is jointly funded by GAC Group, GAC Capital, GAC Research Institute pilot technical team and third-party strategic partner shareholding platform, that is, to overcome fast charging batteries and fast charging technology.
Unlike the general "start-ups", Juwan was established in September 2020, but its Juwan Jiyan first-generation super fast charging power battery products have been installed on GAC Aean models and have obtained the world record certification of "fastest electric vehicle charging technology" issued by the World Record Certification Body (WRCA). Models with a triple rate overcharge battery are on sale in October 2021, and models equipped with a six-fold overcharge battery are also on the market soon.
Distinguishing between high power and ordinary power is generally distinguished by the size of the current, the fast charging rate of most electric vehicles currently on sale is generally 1C, that is, the capacity of the battery is basically one to one times the rate. The greater the multiplier, the more power is charged per unit of time.
Charging magnification directly determines the charging time, perhaps Juwan 3 times or 6 times the charging rate does not look intuitive, we implement to the actual battery: a battery capacity of 72.1kWh super fast charging battery pack in Juwan according to the 3C charging rate, its charging power can reach about 220kW, the maximum charging current is 522A, 0-80% charging time is 16 minutes; and if it is 6C magnification, its charging speed can reach about 420kW, the maximum charging current is 558A, 0-80% Charging time is 8 minutes. This energy efficiency can be fully used to benchmark fuel vehicles.
Juwan super fast charging battery
Of course, individual brands on the market also have their own fast charging technology, such as Tesla's latest V3 super fast charging claims to be able to charge 5 minutes and last 120KM. But the number can only be used as a reference, because the charging speed is not unilaterally determined by the charging pile, if the vehicle's battery itself does not support such a fast speed, then the charging time is naturally not guaranteed.
The vision of Juwan Technology Research has always been to solve the problem of "low charging efficiency". In order to solve this problem, Juwan needs to have a full-dimensional technology of the whole chain from the battery cell body to the charging pile. So the giant bay that specializes in fast charging, what black technology is there in this regard?
In terms of batteries, the charging speed of new energy batteries mainly has higher requirements for two aspects, one is the shuttle speed of lithium ions starting from the positive electrode, passing through the electrolyte, separating the membrane, and reaching the negative electrode; the other is the thermal management brought by fast charging and large current. Juwan Technology Research Institute has mastered a variety of self-research capabilities, from materials to batteries, modules, systems covering the whole field, through the unique new conductive agent materials and systematic engineering design, improve the mobility of lithium ions, embedding / de-embedding rate and conductivity, with a high voltage platform of up to 880V, from the basis to achieve a super charging experience that makes charging as fast as refueling.
Most users believe that fast charging will affect the life of the battery and the safety of the battery, in fact, this is for the general battery. The battery cell designed for super fast charging by Juwan Technology Research Institute, in the case of using 6 times rate overcharge, after more than 2000 times of charge and discharge cycle test, the battery cell capacity is still maintained at more than 80%, far exceeding the standard cycle life test of 1000 fast charge and fast release (1C charging / 1C discharge) required by the national standard. 2,000 overcharge cycles are equivalent to 1 million kilometers of mileage for a vehicle with a 500km endurance. In actual use, even if the car is used to charge the vehicle with high-power overcharge throughout the cycle, it will not face the trouble of needing to replace the battery. In terms of thermal management that affects safety, the upper and lower surfaces of the battery pack of Juwan Technology Research Institute have cooling lines for cooling, and the battery of the dual liquid cooling system has higher heat dissipation efficiency, and with the application of insulating thermal insulation materials, the safety of the battery is naturally significantly improved.
Juwan Nansha Plant
Therefore, the charging speed of Juwan is the fastest among the automotive power battery products that have been listed in the vehicle announcement catalog, and the AION V plus equipped with Juwan batteries is also the fastest charging speed in the current market. In addition to the technology itself, Juwan Technology Research Ultra Fast Charging Battery is currently the only large-scale mass production of 6C batteries in the world, at present, Juwan Technology Research has established a PACK production line in Nansha, with an annual production capacity of 4-5Gwh, which can meet the battery pack supply of about 50,000 electric vehicles. According to the plan, the completed production capacity will reach 120GWh in 2025.
Juwan Nansha factory production line
In terms of the procurement cost of enterprises, it has also achieved the same level as ordinary batteries on the market; and for the user level, the perennial normal temperature 6C fast charge up to 1 million kilometers of mileage also greatly exceeds the current power battery level, and the use is worry-free.
Overcharged field station layout, use without worry
Ultra-fast charging batteries also need to be matched with the corresponding speed of fast charging piles, in the research and development of fast charging piles, Juwan Technology Research has its own technology, and also has its own ideas in the development and construction of super charging stations. Juwan Technology Research Super charging network construction sub-brand "Juwan Giant Fast", set the research and development of super charging piles, the development and construction of super charging stations, open supercharge platform, supercharge network construction, supercharge ecological construction in one.
First of all, talking about the charging gun, Juwan Jukuai has successfully developed a maximum power of 480kw liquid-cooled split JWDC1000 super charging pile, to achieve a maximum voltage of 1000V, a maximum current of 600A, and the charging pile is compatible with the national standard 2015 standard; and the fast charging pile, the terminal supports the maximum voltage of 1000V, the power flow of 250A, the maximum applicable to the market of various brand models.
Construction of Juwan Super Charging Station
Let's talk about the construction of fast charging stations, Juwan Jukuai established a "gas station" charging experience that is charged and walked, and built in a small-scale flexible configuration of the "1+4" mode (that is, 1 super charging pile + 4 fast charging piles) to fully improve charging efficiency, and also let the charging station site from the current remote location into the city and community centers, and continuously improve the quality of supporting construction and operation of new energy vehicles.
Juwan Juku Express Charging Station has been put into operation
Juwan Jukuai's supercharging stations will be launched in 2021, gradually covering major urban areas to meet the basic needs of overcharged vehicles; in 2022, Juwan Technology Research will continue to increase cooperation with multiple parties, integrate resources inside and outside the industry, take the Guangdong-Hong Kong-Macao Greater Bay Area, the capital Beijing as the key layout point, and radiate all over the country as the goal, build a sustainable development of the new energy automobile industry supercharging ecological network, promote and build supercharging basic facilities to major cities across the country, and escort the launch of supercharged vehicles of various brands.
Supercharge technology holds the bull's ear, and it will evolve in the future
Achieving the "double carbon" strategic goal requires the empowerment of disruptive technologies, which is the general consensus of the science and technology community and related industries.
Although fossil energy does not meet the low-carbon trend, but compared with the current lithium iron phosphate or ternary lithium battery, the energy density per unit volume is more than 60 times higher, how to narrow this data, is also a problem conquered by Juwan Technology Research, in the current first generation of supercharge batteries to achieve mass production at the same time, Juwan Technology Research has also carried out the research and development of the next generation of batteries.
Pei Feng, general manager of Juwan Technology Research Institute, once said that the "bay" in Juwan Technology Research Institute represents the meaning of the Bay Area, and "Giant" is taken from the second generation technology of Juwan Technology Research Institute, that is, the next giant capacitor battery (CC-Colossal Capacitor).
According to the unofficial published parameter standards, the energy density of this huge capacity battery is 5-10 times that of ordinary lithium batteries, the charging speed is fast, because it does not go through the conversion loss of chemical energy, its electrical energy utilization rate is as high as 95%, the cycle service life is long, 10 to 500,000 charging cycles, the service life is more than 10 years, and it also has the characteristics of ultra-low temperature characteristics that the mainstream batteries do not have, and the temperature range is wide. According to previous reports, Juwan Technology Research plans to commercialize it by the end of 2023 or early 2024.
In terms of supercharging station construction: Juwan Technology Research promotes the industry to carry out the construction of high-power supercharge network, and cooperates with State Grid Suchuang, Infore Tianshu, Ping An Leasing in the construction of supercharging equipment and field stations. Including the establishment of a joint venture with State Grid Suchuang, Guochuang Juwan, the release of the 3111 co-construction strategy with Infore Tianshu (100 cities and 1,000 stations in 3 years, with a total investment of 1 billion yuan), and the signing of strategic cooperation agreements with Ping An Leasing, E-Dian Bangke and Tianshu New Energy, Ping An Leasing will invest more than 10 billion yuan in the next three to five years to support the development of charging infrastructure.
Editor's summary: The prospect of Juwan Technology Research is to explore the new form of super charging together with partners, and in the mouth of the senior management of Juwan Technology Research, they must "finally achieve the goal of making charging as fast as refueling".
The simpler and more grounded the goal sounds, the more technically difficult it is to achieve and the wider the stakeholders it covers. Focusing on fast charging battery fast charging technology, it shows that Juwan Technology Research is to solve the problem of "slow charging, charging is difficult", and mixed ownership shows that GAC Group will separate it for independent operation, and its market-oriented technology can also be applied cooperatively by other car companies. Whether it is a super fast charging battery or a super fast charging station, the outlook shows that Juwan Technology Research has always been industry-wide.
The goal of Juwan Technology Research is to talk about the future community of new energy.