Writing | Sage
With the increasingly mature new energy car market, whether it is a car manufacturer or a car consumers, it is no longer inexpensive than carpooling configuration, The space size is so simple.
Especially for pure tram types, the safety of power batteries should be the primary standard for users to consider a car.
Then, in recent years, electric vehicles have been spontaneous in the past, so that the battery safety of electric vehicles has become the focus of the public. In December 2015, a small electric car on Rugao, Jiangsu, suddenly fired, 1 8-year-old boy in the car was killed; in May 2017, the electric passenger car in the parking lot of Beijing Crab Island resort boom explosions, burn the electric passenger car 89 vehicles, lost 23 million yuan; on April 21, 2019, a global brand electric vehicle in Shanghai has spontaneously in the parking state …
battery security issues, has exceeded the lifeless mileage, etc. Anxiety, becoming the most concerned question of consumers, is working on a family travel security, and if there is no problem, it will affect the life and death of an electric brand, but will also hinder the forward development of the industry.
Luo Junjie, a minister of the Ministry of Industry and Information Technology, has issued a warning: “Safety is the top priority of the development of new energy auto industry, security issues may have a good development momentum of industries. In recent days, the solution of the electric car battery safety issues has been positively appelred in recent days. China Automotive Technology Research Center Co., Ltd. is implemented in the new national standard GB 38031-2020 “Power Battery Safety Requirements for Electric Vehicles” on January 1, 2021. After testing, the battery is triggered and issues a thermal event alarm signal, no smoke, no fire, no explosion.
How does the power battery of the 图 free? “Three no” safe? Why can I have such an excellent performance?
The first “three-dimensional insulation wall” 
Clothing three yuan lithium does not smoke safety challenge
When the overall growth of the global automotive industry slows, China’s electric vehicle Sales have been ranking in the world for many years, and there is a rare highlight, which has become a rare highlight. This has both industrial transformation needs, and the promotion of policy support. There is also a vigorous technology. Today’s electric car is more like It is a combination of intelligent product combinations of various high-tech elements. The performance and security of each product is critical, and the whole body is moving.
Dynamic lithium battery is widely used in electric vehicles with high energy density, long cycle life, no memory effect, low self-discharge rate and no pollution to environment, and now electric vehicle power batteries are mainly divided into two. Category: Lithium iron phosphate and three-dimensional lithium battery.
Among them, the lithium iron phosphate battery has high safety and longer cycle life, during high-power discharge, or high temperature environment, the performance of lithium iron phosphate batteries is also very stable, so lithium iron phosphate The performance of the battery is very prominent in terms of stability.
However, there are two disadvantages that lithium lithium phosphate cannot be ignored: the first is relatively low in energy density, large weight, and the second is relatively sensitive to temperature, under low temperature environments, and the amount of charge will be significantly reduced.
Contrary to lithium iron phosphate is that the three-dimensional lithium battery has a high energy density and low temperature performance, but there is a higher safety protection and thermal management requirements compared to lithium iron phosphate batteries. Therefore, if the three-dimensional lithium battery wants to be balanced in high performance and high security, the heat management system of the cooling system and the heat management system throughout the battery pack needs to be more cost-effective, and challenges larger.
The main reason for the fire in the dynamic lithium battery is the chemical release of the battery, and the final manifestation is a combustion or explosion caused by thermal out-of-control and thermal out-control expansion.
Therefore, for the three-dimensional lithium battery, it is the three-dimensional “first hero” that can not affont fire when the thermal out-of-control test is performed. Separation wall technology.
And and the test after the battery pack was allowed to observe. After 50 days, it still maintained “no smoke, no fire, no explosion”State. From the electrical cell chemistry system and structure, battery pack structure, thermal protection, safety warning, etc., ensure the safety performance of the full life cycle of the power battery.
First Start from the smallest unit, eliminate the occurrence of safety hazards. The battery cell of the 图 free battery pack is designed with small unit + explosion-proof valve hard shell design, and the electrical cell is introduced into advanced superior heat insulation technology. Layer, when a cell monomer occurs, the “three-dimensional insulation wall” ensures that its release is minimized, avoiding the wavefront to other cells, and prevent the battery pack system from generating thermal failure. Top of the battery It is also added to exceed 1000 ° C high temperature thermal flame retardation, and it is not easy to achieve this goal.
It is not easy to achieve this goal, and the chart needs to overcome the three-dimensional insulation clearance fill. Insufficient, filling of bubbles, etc., using unique module opening solutions, eventually reaches uniform fills between thousands of batches.
It is reported that the R & D cycle of the full thermal expansion performance is one year. Attempting to do more than ten kinds of advanced heat insulating flame retardant materials at home and abroad, this is achieved.
From the overall design of the “three-dimensional insulation wall”, we are not difficult to see the current three-yuan lithium battery in safety. The main R & D direction on the protection is to block the power of thermal diffusion. Only after this, it can realize that the battery is triggered and a thermal out-of-control trigger and issues alarm signal. There is no smoke, no fire, no explosion. [123
Of course, you may ask, this heat-insulating flame retardant protective layer is better?
In fact, the heat-insulating flame retardant protective layer needs to consider battery heat dissipation. [123 In this regard, the small volumetric cell used by the 图 free reflects the congenital heat dissipation advantage, and the bottom of each of the electrical cores are in contact with the high-efficiency liquid cooling system to keep the battery pack with stable heat dissipation capability.
This time, a thermal diffusion test is to use internal heating, and no “acupuncture test” is selected, mainly based on the following points: 图 free uses a small cylindrical battery, if The whole battery pack is acupuncture, the big probability is not damaged, because it is difficult to use a needle to continuously pierce the bottom guard plate, the battery case, the small cylindrical housing three-layer metal protective layer,In order to do acupuncture, it should be acupuncture, and the meaning is not very big.
The figure takes a method of heating inside the battery pack, heats a battery and the peripheral cell temperature to 300deg; c, people are trimmed to heat out of control, then see the entire battery pack reaction, relatively Things, in the thermal diffusion test, this condition is more demanding, more likely to cause some fast thermal spread.
In addition, the point to explain is that the three-dimensional insulation wall technology does not constitute the effects of the heat dissipation of the battery, and the relative large-electrical cells used in the industry are small. The volume of the cylindrical cell, the heat dissipation is natural and good. In addition, the bottom of each of the taps has a super liquid cooling system. Through the test results, the liquid cooling system of the entire battery pack includes heating, and the cooling shows very good performance, which can guarantee the entire battery pack no matter At high temperatures or low-precious areas, always work in a comfortable temperature range.
If the “three-dimensional insulation wall” is passive safety protection, such as seat belts and airbags on the car, the battery safety monitoring and early warning is active security, equivalent to auxiliary driving system.
Therefore, in addition to the material of the cell, the map is based on the original temperature voltage warning of the battery pack, and the battery safety monitoring and early warning model is based on different use scenarios (such as the plains and mountainous temperatures. And humidity, high and low altitude temperature difference, etc.), track each car, using data for each battery.
This is the embodiment of user thinking. Once there is risky, it will leave a sufficient reaction time to the electric vehicle driving personnel. It is reported that 图 free has a patented layout in the field of battery safety technology and test.
Not only that, based on the anxiety of battery safety, the 图 car is customized to develop body protection, high-strength framework, pressure transfer, deformation suction and battery double insurance A total of five battery safety structure design, maximizing the safety of battery packs. This is like a hard armor, decomposes collision pressure, effectively protects the battery pack, so that electric vehicles all the way, safe and worry-free.
When colliding, the fashionable high-strength body frame and the threshold structure protect the battery pack and avoid impact; when the collision is more intense, the aluminum alloy frame and a plurality of plusBattery housing protection formed by strong tendons, and the battery packs of the multi-horizontal strengthening beams, which can well decompose the collision pressure and effectively protect the battery pack.
At present, the national standard requires that the power battery guarantees that 5 minutes does not afford fire after occurrence of thermal loss, and gives the person to escape time. The map not only does not afford fire, not exploding, and can even not smoke, it can be said that he has gained great guarantee.
In the R & D test link, 图 汽车 adopts the stringent test standard higher than the same level model, the international electric motor safety test standard has more than 20, however, 图 汽车 on this basis 60, simulating the various extreme air scenes of users, through fire, squeezing, temperature shock, vibration impact, bottom ball strike, coolant leaks, etc., to create battery pack full-time safety, truly Do your user peace of mind and realize the zerohoot experience of driving by electric vehicle.
Super bike bonding
battery pack safety and then upgrade
[123
A good new brand entrepreneurial environment requires three conditions, the track is large enough, the birth of the revolutionary technology, and the integrity of the supply chain system.
In addition to the technological innovation of the power battery system, the 图 汽车 is a great effort for the body architecture. 
Two global first car tip technology: the world’s first TRB + PATCH composite structure thermoforming A column, using TRB thermoforming process B column; the first use of 2000MPa aluminum silicon coating material door anti-collision beam, improvement The stiffness, strength and durability of the whole vehicle.
Last year, with a hard technical strength, the 图 free is amazing with the 2020 China Body Conference, with a high-strength lightweight, the white car is excellent, and won the special honor medal.
It can be seen that 图 保 保 保 行 行 行 行 行 行 行 行 行 行 行 行 方 方 方 方 方 方Protection, reflects the demanding and persistence of 图 on user security. 
Re-defines the three-dimensional lithium battery safety standard
car is from oil Go to the electricity, the era, everything is in the change, opportunities and challenges, all major cars are also constantly trying to try, BYD’s blade battery and Guangzhou Automobile
Ean
premium release “magazine” The battery has caused the market’s attention. If we do it, we will find that BYD’s blade battery is different from the chemical system of the FREE battery pack. The blade battery is lithium iron phosphate, lithium iron phosphate has its Limitations, resulting in a specific application scenario, such as the southern area of the vehicle, the power, acceleration of the vehicle is not too harsh model, while the Ducha FREE is low temperature performance Excellent, usually used in high-end models.
Guangqi’s magazine battery is focused on traditional thermal management, the structural protection of the module, the core technology of the 图 不 不, has the first three-dimensional insulation wall technology, from the experimental results Different, it is currently the first battery that does not smoke does not affont fire.
According to the “Tiantian Auto”, this “can’t smoke does not smoke this” pure electric version of the battery pack battery is Samsung SDI, the vendor will Reside, co-developed to develop cells and PACK applicable to 图 product demand, which also benefits from the 图 图 图 图 图 图 合 合 合 合 合 合 合 合 合 合 合 合 合 合 合 合 合 战 合 战 战 合 战 合 合 战 战 合 合 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战 战From the aspect of the battery pack, whether it is structure or cooling, etc., the 图 has done a long-time component level and the test of the entire package level.
For the Dongfeng Group in more than 50 years of China’s market, as a traditional fuel car leader, relying on a deep system strength, leading technological innovation capabilities, and excellent team management capabilities, there is a corporate change and future development direction Clear planning, 图 is grasping this opportunity and welcoming the challenge to face.
“Let the car drive the dream, en function for a good life”, and the 图 is committed to providing a better travel experience. 
From the perspective of core technology, the most important power battery of the new energy car can be able to do industry leadership in the new energy vehicle, redefined the safety standards of the three-yuan lithium battery, and the new energy automobile industry in the world. Development is of great significance.
In the intelligent ability, luxurious configuration, the power of life, the 图 is fully satisfied with the smart travel needs of the current user. At the same time, it is also constantly declared that he is a user-type technology car brand.
[iDailycar]