Electric car lithium battery has become mainstream, but we find that the price difference is very large when we buy and sell electric car lithium battery, in the end, how should we choose electric car lithium battery, electric car lithium battery why the price difference is so big, where is the main difference between them?
A, the composition of the electric car lithium battery
Electric car lithium battery is mainly composed of lithium cells, lithium battery protection plate, housing three large components, by the auxiliary materials: such as nickel sheet, link line composition.
Second, what affects the price of electric car lithium battery
1, the type of lithium cells
With the same capacity, used to combine the electric car lithium battery core occupies more than 80% of the cost, which is the biggest difference in the price of electric car lithium battery, in addition, the same capacity, the choice of square polymer, soft pack polymer, and 18650 lithium batteries will appear different finished product prices, in addition, lithium iron phosphate, ternary lithium and other diverse raw materials will also appear different finished product prices.
Second, the price of lithium cells of different well-known brands will be very far apart, the total price gradient direction can be divided into: special lithium cells, Japanese, Korean, domestic (domestic and divided into a line, two lines, and even to five lines, six lines), the same raw material management system and different well-known brands of lithium cells, the price difference will be very large, and according to the sales market survival of the fittest out of each well-known brand lithium cells The quality of most of the well-known brands of lithium batteries is positively correlated with the price.
2, electric car lithium battery BMS (battery management system) of different versions and functions of the price difference
BMS basic version: basic maintenance including overcharge, power loss, overcurrent and overcurrent protection, according to product demand to enhance the temperature protection, etc.
Communication version of BMS: communication protocol can be divided into I2C, RS485, RS232, CANBUS, HDQ, SMBUS, etc. There is also a simple display of battery power, and can choose to add power meter to choose the LED label.
BMS intelligent version; in order to better intelligent system management methods and maintenance of each rechargeable battery module, to avoid rechargeable batteries appear over battery charging and over charging and discharging, to increase the use of rechargeable batteries, supervision of the rechargeable battery situation. Its key roles include: real-time monitoring of the main parameters of rechargeable battery physics; battery state estimation; online diagnosis and early warning information; charging, charging and discharging and pre-charging manipulation; balance management methods and thermal management methods, etc. Sub-system software is mostly used in pure electric vehicle rechargeable batteries.
3, electric vehicle lithium battery shell and packaging on the price of the finished product
Electric vehicle lithium battery casing package for PVC, plastic and metal three material composition, the finished product will have a certain impact.
Electric car lithium battery due to the use of a combination of multiple cells to achieve changes in capacity and power, in addition, a safer manufacturing process will also invariably add more costs, although the purchase of lithium batteries are not necessarily more expensive and safer, but a reasonable price range to choose the right product is also critical.
We are Manly battery Co., Ltd, a professional Lithium battery manufactuerer, if you have requests or queries on batteries, please feel free to contact info@manlybattery.com
