The Difference Between Power Battery And Energy Storage Battery
Jan 8, 2024
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The world is increasingly reliant on renewable energy, and the need for efficient energy storage systems is growing. Batteries are one of the most common energy storage systems, but not all batteries are the same. There are two main types of batteries used for energy storage: power batteries and energy storage batteries.
Power Battery
Power batteries are designed to deliver high peak power output in a short period. They are commonly used in electric vehicles, power tools, and other devices that require quick bursts of energy. They are optimized for high-power output and have a high discharge rate. Power batteries are typically smaller and lighter than energy storage batteries, making them suitable for dynamic applications.
Energy Storage Battery
Energy storage batteries, on the other hand, are designed to store large amounts of energy over a longer period of time. Energy is stored in solar or wind turbine power systems, often used in homes and businesses. Energy storage batteries are optimized for high energy density and their discharge rate is slow. Energy storage batteries are generally larger and heavier than power batteries, making them less suitable for dynamic applications.
Main Difference：
1. Power batteries have high requirements for energy density and power density, while energy storage batteries have higher requirements for cycle life.
2. The cost composition of the two types of batteries is also different and should be taken into consideration when choosing. A power battery pack consists of battery modules, a battery management system (BMS), thermal management system, electrical system, and structural system. The cost of a power battery pack comprises various components such as battery cells, structural parts, BMS, casing, auxiliary materials, and manufacturing expenses.
An energy storage system is primarily composed of a battery pack, BMS, energy management system, energy storage inverter, and other electrical equipment, with the battery cost accounting for 60% of the total cost. The theoretical lifespan of a power battery is around 1500 cycles, which can sustain about 10 years of usage. In contrast, energy storage batteries require a higher cycle life, for example, lithium-ion energy storage batteries used in home energy storage systems need to achieve more than 5000 cycles of cycling life.
3. The battery management system (BMS) for power batteries and energy storage batteries also differs, with stricter requirements for power batteries.
