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Batteries are used to store electricity. In terms of application, they are all energy storage. Therefore, it can be said that all lithium-ion batteries are energy storage batteries. Later, in order to distinguish applications, they are divided into consumer batteries, power lithium batteries and storage batteries according to the scene. There are three kinds of batteries. Since energy storage lithium-ion batteries and electric vehicle lithium-ion batteries are relatively close in terms of voltage and capacity, many friends will consider whether energy storage lithium-ion batteries and electric vehicle lithium-ion batteries can be used interchangeably.
The replacement of lithium-ion batteries for energy storage with lithium-ion batteries for electric vehicles depends on the situation. Of course, it is considered impossible in most cases. We need to understand that power lithium batteries and ordinary energy storage batteries have certain differences in quality performance standards and raw materials, so there will be problems if they are used interchangeably.
According to the different application fields, power lithium-ion batteries are mainly used in pneumatic tools such as pure electric vehicles and electric vehicles, and energy storage lithium-ion batteries are mainly used in peak regulation and frequency regulation power auxiliary services, renewable energy grids and microgrids. Due to different application fields, the regulations on battery performance are also different.
Energy storage lithium-ion batteries have higher service life requirements than power lithium-ion batteries. The service life of new energy cars is generally 5-8 years, while the service life of new energy storage technology projects is generally more than ten years. The service life of the power lithium-ion battery cycle system reaches 1000 to 2000 times, while the energy storage lithium-ion battery generally reaches 3500 times.
The energy storage lithium-ion battery is a conventional lithium-ion battery, which generally supports stable discharge performance within 1C rate. Below we assume that the energy storage lithium-ion battery (non-power type) and the electric vehicle lithium-ion battery have the same capacity, and both belong to the lithium iron phosphate battery or the polymer lithium ion battery. Here we take the lithium iron phosphate battery for a brief explanation.
The general application scenarios of lithium iron phosphate batteries for energy storage are some conventional electronic equipment, such as information base stations, some 3C electronic products, etc. Most of their discharge requirements are below 1C rate, in this case , the performance of the materials used in the manufacture of lithium iron phosphate batteries will be relatively poor. For example, in terms of diaphragms, because low-rate discharge lithium-ion batteries are not easy to heat, the diaphragms will be worse than power batteries in terms of temperature resistance. , the natural price is relatively low.
In terms of internal resistance, due to the small discharge current of energy storage lithium iron phosphate batteries, the internal resistance is generally larger than that of power batteries, that is to say, although energy storage lithium ion batteries and power lithium ion batteries use The type of battery material is the same, but the quality of the same material, the energy storage lithium-ion battery is slightly worse, and the internal resistance will be higher, so in terms of overall price, generally speaking, the energy storage lithium-ion battery is higher than the power iron phosphate. Lithium-ion batteries are cheaper.
So whether the energy storage lithium-ion battery and the electric vehicle lithium-ion battery can be used interchangeably, the first thing to look at is whether the two batteries are of the same type, then whether the batteries are the same in capacity, and finally whether the energy storage lithium-ion battery is the same. Whether the stable discharge current supported by the ion battery can support the requirements of the lithium-ion battery of electric vehicles when driving, and whether the maximum allowable current meets the requirements for short-term use of electric vehicles.
If all of these are met, is it ok? Of course not, this requires you to know how to adjust the electric control system of the electric vehicle when replacing the battery.