Wuling has launched a 2C version of the "Shenlian Battery", which can provide a 15-minute charging capacity and a range of 200 km on the Starlight EV.
Slow charging speed is an inherent problem of many pure electric vehicles, and this problem is difficult to solve in a short period of time.
At the source, suppliers provide high-cost batteries with faster charging rates, such as CATL's Shenxing and Kirin batteries, but the biggest problem is: too expensive!
The cost of the battery pack alone is 70,000 units for 70 kWh.
This also means that whoever can solve the problem of charging, safety and battery life of low-cost batteries will be able to get living space.
At present, the pure electric vehicles in the early 100,000s actually have a more obvious charging speed problem, and the charging voltage of about 350V-400V means that if you want to have a larger charging power, you must have a faster charging current.
For ordinary household electric vehicles, charging power of 100kW is already very fast, but there are very few products that can achieve this data.
Currently, the representative products are the AION S, BYD Qin EV, and Starlight EV. Their charging rates are basically within 2C, which shows that this is a data that can control the comprehensive development of cost, charging speed and battery life.
For example, the Qin PLUS EV, which has been sold for a long time, has a fast charging power of 60kW, a battery capacity of 48kWh, and a rate of less than 1.5C. This is the status quo of entry-level trams, where both range and charging speed have to be sacrificed in order to control costs.
If 2C batteries can be popularized in the future, the charging speed of 100,000-class electric cars can be greatly amplified now.
2C battery, refers to the full charge time of the battery, which only takes about 30 minutes, but at present, many 100,000-level products need about 30 minutes to charge 30%-80%, which means that there is still a lot of room for improvement.
The charging power of many entry-level electric cars is actually only about 50kW-70kW.
There are two factors that limit the increase in charging power, one is voltage, which basically does not use supercharging technology for entry-level products, and the other is current, and the charging current of many models is around 150A (peak), such as AION S MAX.
The most important thing is that at present, many charging piles are 60kW, don't think that there are fast charging piles everywhere, put them in daily use, and the power of charging piles in many areas is very low.
The setting of the 60kW charging pile is 500V/120A, but the vehicle-end voltage of many 100,000-level products is only 400V, and the maximum charging power is only 48kW.
BYD blade batteries are designed to correspond to 135A current for 1C and 2C for 270A. Then the charging power of 2C can reach 100kW, which is a speed that many users can accept.
Indeed, many of the current high-end trams have 4C charging capabilities, but the price of more than 200,000 yuan is not affordable for everyone, and the core sector to promote the development of electrification is still a huge working-class group.
But looking back, how many of the current 100,000-level electric vehicles have reached 2C speed? More charging power is still hovering around 60kW, and it takes an hour to fully charge a 60kWh battery pack, which is actually longer.
Therefore, it is necessary to create a battery with higher charging efficiency in the entry-level market.