From an application perspective, batteries can be divided into digital batteries, power batteries, and energy storage batteries.
As the name suggests, digital batteries refer to batteries used in digital products, such as mobile phones, laptops, mobile power supplies, etc. The opening of the application market for lithium batteries started with digital batteries.
Power batteries are generally divided into large power batteries and small power batteries. Large power batteries often refer to batteries installed in new energy vehicles, while small power batteries refer to batteries installed in electric bicycles or tools.
Energy storage batteries mainly provide storage and output of electrical energy. As an energy storage market where lithium batteries have not yet achieved significant development, what are the differences between the batteries used and power batteries? Can energy storage batteries and high-power batteries be used interchangeably?
Although sometimes it can be interchanged, in fact it is not necessarily the case, and the specific situation needs to be analyzed in detail.
Firstly, let's see if the energy storage battery can be used as a power battery.
The general application scenarios of energy storage batteries are for some conventional electronic devices, such as information base stations, some 3C electronic products, etc. Their discharge requirements are mostly around 1C rate. In such cases, the material performance of the battery will be relatively poor, such as the separator. Because lithium batteries with low rate discharge are not easy to generate heat, the separator will be worse than power batteries in terms of temperature resistance, and the natural price will be relatively lower.
Furthermore, in terms of internal resistance, due to the small discharge current of the battery, the internal resistance is generally larger than that of power type batteries.
That is to say, although the types of battery materials used in energy storage lithium batteries and power lithium batteries are the same, in terms of quality, energy storage lithium batteries are slightly inferior and their internal resistance will be higher. Therefore, in terms of overall price, energy storage lithium iron phosphate batteries are generally 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 around 5C. Can energy storage batteries be used in electric vehicles?
The first thing to consider is whether the types of these two batteries are the same, then whether the batteries have the same capacity, and finally, whether the stable discharge current supported by the energy storage lithium battery can meet the requirements of electric vehicle lithium battery operation, as well as whether the maximum allowable current meets the requirements of electric vehicle short-term use.
If all of these are met, it is necessary to adjust the electric control system of the electric vehicle when replacing the battery.
Secondly, power batteries are used for energy storage.
After designing a control system for the discharge size of lithium batteries, it is possible to use electric vehicle lithium batteries as energy storage lithium batteries. However, the economic benefits may not be ideal, as battery costs and power control system costs are high.
This is also one of the reasons why power batteries can be utilized in stages.