Time flies quickly, and it is the beginning of winter again, which means that winter has begun. At this time, it has snowed heavily in the north, and even in the mountainous areas of northern Guangdong, where the sun is shining, there is a large temperature difference in the morning and evening. The author can't help but think of the embarrassing scene of the previous second-hand car period - old cars that are more than three years old, especially those that have not had their starting batteries replaced, have a high probability of not being able to get on the car in the morning after a night of cold wind baptism outside. Crossing the river dragon and starting treasure are the necessary "good medicine" for winter vehicle rescue.
At present, the starting battery of most vehicles on the market still uses traditional lead-acid batteries, which are batteries that use lead dioxide (PbO2) and metallic lead (Pb) as electrode materials. Its electrolyte is a sulfuric acid solution, and the separator is made of materials such as glass fiber or rubber. The structure of a battery is generally composed of a positive electrode, a negative electrode, a separator, and an electrolyte. This kind of battery was born earlier, and has been used as a starting battery for various vehicles for a long time.
However, it is well known that lead-acid batteries have a very short service life, and they need to be scrapped after an average of 350 times of complete charging and discharging. Because each discharge process will form different degrees of plate vulcanization, especially in winter, multilayer crystals appear, a considerable part of which cannot be reduced during the charging process. Therefore, as long as you find that the vehicle is difficult to start, please replace the battery in time, especially in winter.
Ideally, as long as you leave the car directly after the ignition is turned off, the power consumption of the quiescent current and anti-theft system is very low, and it can be fully charged every three or five days. Using the vehicle in this way, the lead-acid battery can also be used for a long time as a starting battery. However, from the perspective of the old cars that the author has contacted, as long as the vehicle is used less, the lead-acid battery is easy to break. In particular, the generator is unstable, or the vehicle has been modified with audio, dash cam and other electrical appliances in the later stage, and the original car battery is easily damaged if the vehicle is not started for a long time after the ignition is turned off.
Throughout the life cycle of the vehicle, traditional lead-acid batteries usually need to be replaced every three years, and the cost of each replacement is about 400-600 yuan. If you can't start it and you need to take an electric or trailer, the cost will be higher.
Based on the user's bad experience with lead-acid batteries, BYD sees it in its eyes and moves it in its hands. Since 2009, BYD has been developing a 12V lithium iron phosphate battery system. As an alternative to lead-acid batteries, lithium iron phosphate starter batteries have broken the history of lead-acid batteries for more than 100 years, and have been maturely applied for many years. Don't underestimate such a small battery, it is a revolution that promotes the lead-free automotive industry.
Lithium iron phosphate starter battery is a lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the cathode material. Traditional lead-acid batteries are not easy to break for a long time, have a short lifespan, need to be replaced regularly, have the risk of lying in the nest, need to take power or rescue, and other shortcomings, it does not have any shortcomings! It has a higher energy density, a longer lifespan, and a faster charging speed. At the same time, lithium iron phosphate starter battery also has good high-temperature performance and safety, can work normally in a high-temperature environment, and is not prone to safety accidents such as combustion or explosion.
It does not need to be replaced for life, and it has the same life as the whole vehicle
The life of lithium iron phosphate starter battery is much longer than that of traditional lead-acid batteries, with a cycle life of more than 3,000 times, which is several times that of traditional lead-acid batteries. The lithium iron phosphate starting battery is equivalent to the same life as the whole vehicle and does not need to be replaced for life. In addition, BYD also provides the same 6-year or 150,000-kilometer warranty as the whole vehicle. This can reduce the frequency of battery replacement and maintenance costs, and improve the efficiency of battery use. Family cars no longer have to worry about the cost of replacing the starting battery, and even business vehicles such as ride-hailing can do it.
Intelligent power protection, long-term no power loss
For BYD's hybrid models, the lithium iron phosphate starter battery can not only be deeply discharged, but also can obtain power from the power battery when the power is low. In addition, the battery also has a one-button wake-up function, which can avoid the embarrassing situation that the vehicle cannot start. BYD has equipped the starter battery with a BMS battery management system, which can monitor the battery status in real time and manage it dynamically. When the starting battery is low, the power battery can charge it to avoid the problem of low power. Under the effective monitoring of the battery management system, the vehicle can be parked for a long time without power loss.
Lightweight and compact, with higher energy density
In terms of battery size, lead-acid batteries are relatively large and occupy a large amount of space in the car, which limits the layout of the space in the car. In addition, the weight of the general lead-acid battery is more than 10 kg, which is not conducive to lightweight and increases the energy consumption of the whole vehicle.
The lithium iron phosphate starter battery has a higher energy density, and the minimum weight can be only 2 kg, which has the advantages of lightweight and miniaturization, which is conducive to the flexible layout of the vehicle and further reduces the energy consumption of the vehicle. In addition, the energy density of lithium iron phosphate starter batteries is also higher than that of traditional lead-acid batteries. This means that with the same volume and weight, the lithium iron phosphate starter battery can store more energy. This makes it even more advantageous in applications that require high energy.
Technological innovation, solve pain points regardless of cost
In terms of cost, lithium iron phosphate starter batteries are much more expensive than lead-acid batteries. The main costs of lithium iron phosphate power batteries include material costs, production process costs, labor costs and transportation costs. Among them, the cost of materials is one of the most important costs. The cathode material of lithium iron phosphate power battery is mainly lithium iron phosphate, and the anode material is mainly graphite. The cost of these two materials is higher, accounting for 50%-60% of the overall battery cost. In addition, the cost of auxiliary materials such as electrolytes, separators, and electrode collectors cannot be ignored.
At present, the direct material cost of the 280Ah battery cell is 348.951 yuan, the manufacturing management cost is 99.187 yuan, and the total cost is 448.138 yuan. Between cells of different specifications, the cost of electricity can be more intuitively represented by the cost of cells. After calculation, the direct material cost of large-capacity battery cells is 389.45 yuan/kWh, the manufacturing management cost is 108 yuan/kWh, and the LCOE of battery cells is 497.45 yuan/kWh.
After more than ten years of research and development, BYD iterates backward products with innovative technology, so that the starter battery will never "drop the chain" again.
Green and environmentally friendly
For the environment, BYD's lithium iron phosphate starter battery makes the whole vehicle lead-free and environmentally friendly. Compared with traditional lead-acid batteries, it can reduce pollution and harm to the environment, and meet the environmental protection requirements of today's society. Experimental data show that BYD's lithium iron phosphate starting battery has been tested by more than 200,000 vehicles, and has achieved a cumulative reduction of more than 20,000 tons of lead - these leads can cause heavy metal pollution in more than 140,000 acres of soil, and the remediation of these soils will produce an additional carbon emission of about 84,000 tons. In summary, the iron phosphate carp starter battery not only realizes the qualitative change of user experience, reduces the harmful substance lead, and the environmental benefits are also very significant.
Write at the end: Consumers may be concerned about price, design, configuration or battery life when buying a vehicle. As an inconspicuous component, the starter battery can produce a cliff-like poor user experience in the process of accumulated use. BYD's lithium iron phosphate starting battery is widely used, but it can perfectly solve the pain points of lead-acid starting batteries.
At a time when sustainable development is being promoted, waste lead-acid batteries may lead to serious pollution of the atmosphere, water and soil due to the presence of lead and lead-acid liquid. BYD's lithium iron phosphate starter battery has achieved lead-free, which is of great significance to environmental protection and the development of green economy. We always have reason to believe that BYD's "black technology" will continue to bring more surprises to a better life for mankind.