5 differences between energy vs power battery

5 differences between energy vs power

Table of Contents

Energy vs power battery is an important technology in today’s energy storage and e-mobility field. Essentially, both types of batteries are energy storage batteries, and there is not much difference in the technology route. What is the difference between energy vs power battery? Can they be used together? This article will analyze the specific differences between these two types of batteries.

What is an energy storage battery?

What is an energy storage battery

An energy storage battery is a battery system used to store electrical energy. As a senior LiFePO4 battery manufacturer in China, our drop-in replacement battery and other batteries can be applied in your home energy storage as well as commercial energy storage. If you want to know more about it, please contact us. Energy storage can convert electrical energy into chemical energy by storing a charge in a battery and releasing it when you need it. It is typically designed for long-duration energy storage and charging/discharging and plays an important role in, for example, grid scheduling, peak load reduction and power management. Compared with other batteries, the high capacity, long cycle life and stable performance are its most distinctive features.

What is a power battery?

Power battery is specialized in providing the power needed for electric vehicles. They need to have high energy density and high power output to meet the acceleration and range requirements of electric vehicles. The design of power batteries focuses on improving the charging rate, discharging rate and cycle life of the batteries. At the same time, safety is also an important aspect of concern for power batteries to ensure reliable operation under a variety of conditions.

What is the 5 differences between energy vs power battery?

What is the 5 differences between energy vs power battery

Differences in application scenarios

Energy storage batteries are mainly optimized for energy density and long-term storage to meet the demand for high-capacity and long-lasting energy storage. Therefore, they are widely used in the fields of grid energy storage, home energy storage, industrial and commercial energy storage, and communication base stations. Since the vast majority of energy storage batteries do not need to move, lithium batteries for energy storage do not have direct requirements for energy density. Different energy storage scenarios have different requirements for power density. For example, our power-wall battery is usually used in home energy storage. When making energy storage batteries, we pay attention to the expansion rate of the material, energy density, and the uniformity of the electrode material properties, and others, in order to pursue the long life and low cost of the whole energy storage device.

When comparing energy vs power battery, power battery is more focused on power density and short-term high power output. Therefore, it can meet the needs of electric vehicles for fast acceleration and long mileage. Power batteries are generally used in new energy passenger cars, commercial vehicles, special vehicles, engineering machinery and equipment, ships and so on. In terms of energy vs power battery, power battery requires higher energy density and power density. Moreover, because power battery is limited by the size and weight of the car and the acceleration during startup, power battery has higher performance requirements than ordinary energy storage battery.

Differences in system composition

Power battery pack basically consists of the following five systems, namely battery module, battery management system, thermal management system, electrical system and structural system. The cost of power battery system consists of the comprehensive cost of electric cell, structural parts, BMS, case, auxiliary materials, manufacturing costs and so on. The electric cell occupies about 80% of the cost, and the cost of pack (including structural components, BMS, case, auxiliary materials, manufacturing costs, etc.) occupies about 20% of the cost of the whole battery pack.

Differences in system composition

An energy storage battery system is mainly composed of a battery pack, a battery management system (BMS), an energy management system (EMS), an energy storage converter (PCS), and other electrical equipment. Batteries are an important part of the cost of an energy storage system, accounting for 60% of the cost. This is followed by the energy storage inverter at 20%, the EMS (Energy Management System) at 10%, the BMS (Battery Management System) at 5%, and the others at 5%.

Difference in battery management

BMS as the core component of the battery system, determines whether the various components and functions of the battery pack can be coordinated, and is directly related to whether the battery pack can safely and reliably provide power output for electric vehicles. Energy vs power battery has similar battery management system. However, the power battery system is located in the high-speed movement of the electric vehicle, the power response speed, power characteristics, SOC estimation accuracy, the number of state parameter calculations on the battery has higher requirements. And the related regulation function also needs to be realized by BMS.

Difference in cycle life

Energy vs power batteries have different life requirements. Energy storage batteries typically require a longer cycle life, able to withstand thousands of charge/discharge cycles without significant performance degradation. For example, a rack mounted battery for home energy storage has a theoretical life of 4,000 cycles, or ten years if it is fully charged and discharged once a day.

Energy vs power battery in the energy storage battery phase of the more frequent charging and discharging, in the same 10 years of life under the premise of the cycle life has higher requirements. If the energy storage power station and home energy storage once a day charging and discharging, energy storage lithium battery cycle life requirements can be greater than 3500 times. If the frequency of charging and discharging is increased, the cycle life requirement is usually more than 5000 times.

Difference in cost

Difference in cost

Cost is also one of the differences between energy vs power battery, with energy storage batteries being relatively low cost. Because it uses more mature battery technology and the application working conditions are relatively simple, economic benefits can be realized in large-scale applications. In contrast, power batteries are more costly, mainly due to the requirement for high energy density and high power output, compatible with the need for long battery life and high safety.

Can energy vs power battery be used together?

Storage batteries cannot be used in electric vehicles. This is because energy vs power batteries have different multipliers, different internal resistances, different capacities, and different voltages. Energy storage batteries generally have higher energy density, but lower power density. Therefore, energy storage batteries can not be used as lithium power batteries.

And power lithium batteries can be used as energy storage batteries, you need to understand the design and configuration of the lithium battery discharge size of the control system. But power batteries and power control systems have a high cost factor, which can lead to less desirable economic benefits. It is understood that lithium storage batteries also have power type, such as support for about 5C stable current discharge capacity in the FM is widely used. Some companies will retire down the power battery as a secondary use of energy storage batteries, applied to household storage and mobile energy storage and so on. And our LiFePO4 batteries are made of brand new A-grade cells, which can provide high quality batteries for your energy storage applications.

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In the past 15 years, Virtue has been committed to the development and production of sustainable and high-efficiency household energy storage lithium battery solutions. Our team has worked tirelessly to improve our LifePo4 Battery Pack products to better serve clients’ needs.

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