The difference between storage battery and power battery

From the application side, batteries can be divided into digital batteries, power batteries and energy storage batteries.
As the name implies, digital batteries refer to batteries used in digital products, such as mobile phones, laptops, and mobile power supplies. Lithium batteries opened the application-side market, starting with digital batteries.

Power batteries are generally divided into large power batteries and small power batteries. Large power batteries mostly refer to batteries mounted in new energy vehicles, while small power batteries refer to batteries mounted in electric bicycles or power tools.

Energy storage batteries mainly provide electrical energy storage and electrical energy output. As the energy storage market where lithium batteries have not yet been greatly developed, what is the difference between the batteries used and power batteries? Can energy storage batteries and large power batteries be used interchangeably?

Although sometimes interchangeable, in fact it is not necessarily, and the specific situation needs to be analyzed in detail.

First look at whether energy storage batteries can be used as power batteries.

The general application scenarios of energy storage batteries are the electricity consumption of some conventional electronic equipment, such as information base stations, some 3C electronic products, etc., and their discharge requirements are mostly around 1C. In this case, the battery used Material performance will be relatively poor. For example, in terms of separators, because low-rate discharge lithium batteries are not easy to generate heat, in terms of temperature resistance, separators will be worse than power batteries, and the price is relatively lower.

Furthermore, in terms of internal resistance, because the battery discharge current is smaller, the internal resistance is generally larger than that of power batteries.

In other words, although energy storage lithium batteries and power lithium batteries use the same type of battery material, the quality of the same material is slightly worse for energy storage lithium batteries, and the internal resistance will be higher. Therefore, in terms of overall price, generally In other words, energy storage lithium iron phosphate batteries are cheaper than power lithium iron phosphate batteries.

In fact, energy storage batteries also have power types, such as supporting a stable current discharge capacity of about 5C. Can energy storage batteries be used in electric vehicles?

The first thing to look at is whether the types of the two batteries are the same, and then whether the batteries are the same in terms of capacity, and finally whether the stable discharge current supported by the energy storage lithium battery can support the requirements of electric vehicle lithium battery driving, and Whether the maximum allowable current meets the requirements for short-term use of electric vehicles.

If these are met, the electric control system of the electric vehicle needs to be adjusted when the battery is replaced.

Secondly, power batteries are used for energy storage.

After the design and configuration of the control system for the discharge size of the lithium battery, it is possible to use the lithium battery of an electric vehicle as an energy storage lithium battery. However, it may not be ideal in terms of economic benefits, after all, the cost of the battery and the cost of the power control system are high.

This is also one of the reasons why power batteries can be used in cascades.


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