Lithium battery Pack price structure:
Lithtech Lithium battery pack price mainly includes cell, BMS and shell parts etc. At the same time due to the power consumption of the electric appliances and electric current, the size of the material on the connection between the batteries (conventional nickel sheet, forming nickel, copper nickel composite plate, jumper, etc.) selection will affect the cost of different connectors (such as aviation plugs, from ten yuan to thousands of yuan) may also affect the cost is larger, and the different pack process will also affect the cost.
Lithium Battery Price Factors
First, the selection of different material system cells will affect the price of lithium batteries.According to the anode material of lithium-ion batteries is different, there will be a lithium manganese acid (3.6V), cobalt acid lithium (3.7V / 3.8V), nickel, cobalt, manganese acid lithium (commonly known as the three yuan, 3.6 V), (3.2 V), lithium iron phosphate lithium titanate (2.3 V/ 2.4V), and other material system of batteries, the batteries of different material system, its voltage platform, safety coefficient, recycling times, energy density ratio, temperature, etc.
3.2v 100Ah cell
3.2v 277Ah prismatic cells
It is the price of different brands of batteries will also vary widely, the total price gradient can be divided into: special batteries (including temperature, super high temperature, super high rate, alien), Japanese (Panasonic, sanyo, Sony), South Korea (Samsung, LG), domestic (Chinese is divided into a line (lishen, bick, byd, ATL), the second line, or even can be assigned to the five lines, six lines), the material system and different brands of batteries, the price difference will also is very large, and through the quality of the market evolution of each brand batteries (secure, consistency and stability) is basically is proportional to the price.
BMS is the combination of the first letter of BATTERY MANAGEMENT SYSTEM, called BATTERY MANAGEMENT SYSTEM, commonly known as battery nanny or battery housekeeper, mainly for intelligent management and maintenance of each battery unit, to prevent battery over charge and over discharge, to extend the battery life, monitoring battery status.Its main functions include: real-time monitoring of battery physical parameters;Battery state estimation;Online diagnosis and early warning;Charge, discharge and precharge control;Balance management, thermal management, etc.The secondary system is mostly used in electric vehicle batteries.
3).lithium battery case
Lithium battery shell design can be divided into: PVC heat seal, plastic, metal.
PVC heat sealing: the specific outer shell packaging form of battery pack mainly depends on the specific needs of customers. For the packaging form of PVC heat sealing, it is generally applicable to the battery cell string with a small quantity and a light overall weight (≤2kg), which can be adopted.However, for the battery pack with the overall weight ≥1kg, it is necessary to add a fixed support between the cells, and then use PVC heat sealing after adding glass fiber board protection on the periphery.
Plastic: plastic shell, mainly different battery pack after finalize the design, involving shell may need to open mold, mold fee is a lot of money, such as the early stage of the development, the product did not finalize the design, can use hand shell proofing (hand strength after mould shape is better than material strength), the material and process of shell (especially the belt is three demands), will also affect the cost. Pictures are plastic case as followings:
TE24100( 24V 100Ah) LiFepo4 battery pack for RV
TE12300( 12V 300Ah) lithium battery pack
Metal: metal shell is the same as plastic shell, the product is not finalized before or the quantity demand is not much, it is recommended to use sheet metal to make sample, so that the main is to make sample delivery period is shorter, such as large batch, also recommended to open mold.For the metal shell waterproof grade requirements, will also greatly affect the cost, there is a special material (such as titanium alloy) metal shell requirements, the cost will be higher. Below metal cases for your reference:
TE2000( 48V 50Ah) battery for solar system
TE4000( 48V 100Ah) battery for Golf Cart/ RV/ Marine/ UPS/ camping car/ home Appliance/solar energy storage system
n the word, the cost of lithium batteries is mainly composed of battery cells, BMS and structural parts, plus the cost of pack, aging and management.At the same time due to the technical difficulty of the product, the purchase amount, the defective rate requirements are different, lithium battery prices will vary greatly!