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Although both power lithium batteries and energy storage lithium batteries are lithium batteries, they are completely different in nature. I believe that after reading the following breakdown, you will have a deeper understanding of the difference between power lithium battery and energy storage lithium battery. When we use the battery, we can choose according to their needs.
1, first of all, the difference in battery capacity: For all new batteries, the battery capacity is tested by the discharge meter. Generally, the capacity of power lithium battery is around 1000-1500mAh; the battery capacity of energy storage lithium battery pack is above 2000mAh, and some can reach 3400mAh.
2、Different application industries
Power lithium batteries are mainly used in electric vehicles, electric bicycles, electric motorcycles, electric equipment and tools drive power supply batteries; used in power transmission and substation to provide closing current for power devices; energy storage lithium battery pack is mainly used in hydropower, thermal power, wind power, solar power plants and other energy storage power, peaking and frequency regulation power supply auxiliary services, digital products, power products, medical security products, UPS power supply, etc.
3, lithium battery BMS battery management system positioning is different
In the energy storage system, the energy storage lithium battery only interacts with the energy storage converter at high voltage, the converter takes power from the AC grid to charge the battery pack; or the battery pack supplies power to the converter, and the power is converted by the converter into AC power to the AC grid; the BMS battery management system for electric vehicles has an energy exchange relationship with the motor and charger at high voltage. Communication, information interaction with the charger during the charging process, and the most detailed information interaction with the vehicle controller during the whole application.
4. Using different types of batteries
For safety and economic reasons, in the selection of lithium battery pack, lithium iron phosphate batteries are often used. Some energy storage plants use lead-acid batteries and lead-carbon batteries; The current mainstream battery types for power lithium battery electric vehicles include lithium iron phosphate and ternary lithium batteries.
5. Different types of power lithium batteries are batteries that provide power for transportation vehicles, generally compared with small batteries that provide energy for portable electronic devices; ordinary energy storage lithium batteries are primary batteries with lithium metal or lithium alloy as the cathode material, using a non-aqueous electrolyte, different from rechargeable lithium-ion batteries and lithium-ion polymer batteries.
6. Different performance and design
Power lithium batteries focus more on charging and discharging power, requiring fast charging speed, high output power and shock resistance, with special emphasis on high safety and high energy density to achieve long-lasting range, as well as lightweight requirements in weight and volume; the preparation of energy storage lithium batteries emphasizes battery capacity, especially requiring operational stability and service life, and more consideration for the consistency of battery modules. In terms of battery materials, attention should be paid to the expansion rate of electrode material performance, energy density and uniformity of battery material performance, etc., in order to pursue the long life and low cost of the whole energy storage device.
The above is the introduction of energy storage lithium battery and power lithium battery difference, through the above introduction believe that you have a deeper knowledge of energy storage lithium battery and power lithium battery difference.