Lithium batteries are much more expensive than lead-acid batteries. The cost composition of lithium battery combinations has always been the focus of consumer concern. Let's look at a detailed analysis of the cost composition of lithium battery combinations.

　　Selection of battery material systems

　　This is the most critical point. The selection of cells with different material systems will affect the price of the entire lithium battery. Lithium batteries include lithium manganese oxide (3.6V), lithium cobalt oxide (3.7V/3.8V), ternary lithium (3.6V), lithium iron phosphate (3.2V), lithium titanate (2.3V/2.4V), etc. Cells of a kind of material system.

　　The user must select the appropriate battery cell after communicating with the supplier according to their actual needs.

　　Demand and design of lithium battery PCM/BMS

　　Both PCM and BMS systems have basic protections: overcharge protection, over-discharge protection, overcurrent protection and short circuit protection. Overtemperature protection can be added according to product requirements.

　　PCM is a low-cost basic protection. BMS is high-cost intelligent management and maintenance.

　　BMS can do real-time monitoring of battery parameters, battery state estimation, online diagnosis and early warning, charge, discharge and pre-charge control, balance management and thermal management, etc. At the same time, it has a variety of communication functions. The communication protocol can be divided into I2C, RS485, RS232, CANBUS, HDQ, SMBUS, etc.

　　Demand and design of lithium battery case

　　PVC wrapping: generally suitable for lithium battery combinations with a small weight.

　　Plastic: It is recommended to open the mold for the heavy lithium battery combination, but the mold cost is not a small expense.

　　Metal: It is recommended to adopt the metal shell requirement in certain occasions where impact damage is required.

　　The cost of the lithium battery combination is mainly composed of batteries, PCM, and structural parts, plus the company's PACK costs, aging costs, and management costs.

　　Based on the above factors, the price of lithium battery packs varies greatly.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data centers and other industries.