The price of lithium batteries is made up.
The price of lithium battery is mainly composed of the battery core, protection board, shell three components, at the same time due to the power consumption of electrical appliances the size of the current, the material between the cell (conventional nickel sheet, molded nickel chip, copper nickel chip, cross-seam film, etc.) selection will affect the cost, different plug-ins (such as aviation plug, a dozen yuan to thousands of yuan are) may also have a greater impact on the cost of PACK, there are different processes will also affect costs.
The price of lithium batteries.
First, the selection of the core:
First, the selection of batteries in different material systems will affect the price of lithium batteries. Lithium batteries will have lithium manganese acid (3.6V), lithium cobalt (3.7V/3.8V), lithium nickel cobalt manganese acid (commonly known as triple, 3.6V), lithium iron phosphate (3.2V), lithium titanate (2.3V/2.4V) other material systems of the electric core, its different material systems of the battery core, its voltage platform, safety coefficient, cycle use, energy density, etc.
Second, the price of different brands of electric cores will also vary greatly, the total price gradient can be divided into: special cores (including ultra-low temperature, ultra-high temperature, ultra-high magnification, foreign type), Japanese (Panasonic, Sanyo, Sony), Korean (Samsung, LG), domestic (domestic divided into a line (Lishen, Bick, BYD, ATL), second-line, even to the same material system different brands of the core, the price will be very different through the market the fittest out of the brand of the quality of the core (safe type, consistency, stability) is basically directly proportional to the price.
Second, lithium battery PCM demand design.
PCM design can be divided into: basic protection, communication, BMS.
Basic protection: basic protection contains overcharge, over-discharge, overcurrent short-circuit protection, can be increased according to product demand overtemperature protection.
Communication: Communication protocol can be divided into I2C, RS485, RS232, CANBUS, HDQ, SMBUS, etc. , as well as a simple power display, you can use the power meter led indicator.
BMS: BMS is a letter combination of BATTERYMANAGEMENT SYSTEM, known as battery management system, commonly known as battery babysitter battery butler, mainly for the intelligent management maintenance of each battery cell, to prevent the battery over charge discharge, extend the battery life, monitor the state of the battery. Its main functions include: real-time monitoring of battery physical parameters, battery status estimation, on-line diagnosis early warning, charge, discharge precharge control, equalization management thermal management. Secondary systems are used in electric vehicle batteries.
Third, the demand design of lithium battery housing.
Lithium battery shell design can be divided into: PVC hot seal, plastic, metal.
PVC thermal seal: battery pack outside the specific use of what kind of shell package form, mainly depends on the specific needs of the guest's products, for the use of PVC thermal seal ingenuity form, generally applicable to the cell string the number is much, the overall weight of lighter (2kg), can be used. But for the overall weight of 1kg of the battery pack, need to be added between the battery bracket fixed bracket, the peripheral glass fiber plate protection, then the use of PVC thermal seal.
Plastic: the use of plastic shell, mainly after different battery pack training, the shell involved may need to open mold, mold costs are small expenses, such as pre-development, product strain, can be used hand plate shell proofing (hand plate strength is as strong as after mold training material strength), the material process of the shell (especially with three defense requirements) requirements are different, will also affect costs.
Metal: metal shell is also the same as plastic shell, the product is shaped before quantity demand is much, it is recommended to use sheet metal samples, so that the main sample delivery period is short, such as large volume, also recommended to open the mold. For the metal shell has waterproof grade requirements, will also greatly affect the cost, there is a special material (such as titanium alloy, etc. ) metal shell requirements, the cost will be higher.
The cost of lithium battery is mainly composed of cell, PCM, structure, plus the enterprise's PACK fee, aging cost, management fee so on. At the same time, due to the technical difficulty of the product, procurement usage, the requirements of the non-performing rate are different, lithium battery prices will vary greatly!