With the development of industrial policy and the new energy industry, especially the policy of limited electricity and time-of-use electricity price, the application range of lithium battery energy storage systems is becoming more and more extensive. Many friends are thinking about which energy storage battery is better. Such as lead-acid batteries, soft-pack polymer lithium batteries, and lithium iron phosphate batteries.
The quality of an energy storage battery mainly depends on its material. Generally speaking, a high-quality energy storage battery has a long life, which can effectively reduce the cost of repair and maintenance, and also reduce the overall investment of the system. Moreover, the high-quality energy storage battery has a strong ability to charge and can charge more stably.
Types of energy storage batteries:
Lead-acid batteries
Lead-acid batteries have been used as energy storage batteries for a long time, mainly because lead-acid batteries were invented early and the technology is relatively mature. Of course, their cheap manufacturing costs are also one of the most popular factors.
Soft pack polymer lithium battery
In terms of the economic benefits of energy storage batteries, the use of soft-pack polymer lithium batteries is the most expensive, and the safety performance is also the most unstable. This is why the batteries used in many new energy vehicles are not polymer lithium batteries.
Lithium iron phosphate battery
Lithium iron phosphate battery is the most high-temperature-resistant battery among all energy storage batteries, which has laid a certain foundation for safety and stability. Then, in terms of providing high-current discharge, although it is slightly worse than polymer lithium batteries, it is much better than lead-acid batteries. Therefore, the batteries used by many smart cargo trucks or robots used in warehousing and logistics are basically lithium-iron phosphate batteries.
Stability In terms of product materials, it is divided into polymer lithium batteries and lithium iron phosphate batteries, etc. In a comprehensive comparison, the performance and stability of lithium iron phosphate batteries are better choices for energy storage batteries, because in terms of temperature resistance, phosphoric acid Lithium iron battery is the best battery in the energy storage battery, which has laid a solid foundation for stability. Besides, in terms of providing high-current discharge, although it is slightly worse than polymer lithium batteries, it is much better than lead-acid batteries. Therefore, the batteries used by many smart cargo trucks or robots used in warehousing and logistics are basically lithium-iron phosphate batteries. Furthermore, lithium iron phosphate batteries are environmentally friendly and non-polluting, and they use a wide range of raw materials for manufacturing, which is a good product for sustainable development. Last, in terms of electro-chemical performance, such as battery capacity, energy density, and cycle life, it is far superior to lead-acid batteries. In terms of cost and safety, polymer batteries perform too well.
There are three types of energy storage lithium battery cells for shape packaging, one is a square aluminum shell, the other is a cylindrical steel shell, and the last is a soft-wrapped aluminum plastic film. Shape packaging For the same type of lithium battery, under the fixed battery compartment space designed by the product, the soft pack lithium battery can achieve lightweight and the largest battery capacity, but the price is relatively slightly more expensive, while the square aluminum shell and round Shaped steel shell is the second largest in terms of capacity, and the steel shell is the heaviest in terms of weight, which is not an ideal choice for products that require lightweight. In terms of space utilization, the soft case is the best, and the steel case is the worst. Of course, the steel shell is the cheapest in terms of price.
Although the purchase price of lithium iron phosphate batteries is two to three times that of lead-acid batteries, the economic benefits are still much higher in the long run. In other words, if the cycle life of lithium iron phosphate batteries is long enough, even if the initial purchase price is a little higher, it is still cost-effective overall.