The use of photovoltaic energy storage lithium batteries as energy, can obtain current, stable voltage, stable current, stable power supply, small influence by the outside world, simple structure, convenient carry, and convenient charging. It is not affected by external climate and temperature. Its performance is stable and reliable, and it plays an important role in all aspects of modern social life, and occupies a large proportion in the use of electrical energy.

There are many brands of photovoltaic energy storage batteries, including lead -acid batteries, nickel -metal hydride batteries and lithium batteries. Most factories choose lithium batteries as power supply for photovoltaic energy storage lithium batteries. Let's first understand the advantages of photovoltaic energy storage batteries compared with other batteries:

1. High -voltage photovoltaic energy storage lithium battery platform: The average voltage of the single battery is 3.7V or 3.2V, which is about the series voltage of the three nickel -cadmium batteries or nickel -metal hydride batteries, which is conducive to forming a battery power supply unit.

2. Compared with the battery, photovoltaic energy storage lithium batteries have higher energy density. The energy storage density is high, reaching 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries. Compared with lead-acid batteries, lithium battery weight is lighter, and the weight is about 1/5 of the same volume of lead-acid products.

3. The service life of photovoltaic energy storage lithium batteries is relatively long. The battery with lithium iron phosphate can be charged and discharged 1CDOD, which can be used 1000 times; the high and low temperature of the lithium battery can be used in high-low temperature, which can be used in the environment of -20 ° C-60 ° C. After processing, it can be used in -45 ° C environment.

When selecting photovoltaic energy storage lithium batteries, we can consider determining the battery specification model from comprehensive consideration, voltage, weight, weight, environmental temperature, safety, and cycle life from the battery.

1. Communication protocol

At present, the main communication protocols of photovoltaic energy storage lithium batteries are RS485, RS232, CAN. Select the BMS module of the battery according to the communication protocol.

2. Voltage

Here, the rated voltage and resistance of the output end should be considered to determine the voltage and material of the photovoltaic energy storage lithium battery. The rated voltage of the battery should not be lower than the rated voltage of the motor. However, the full voltage of the battery should not be higher than the voltage of the device. Therefore, sometimes the voltage of the photovoltaic energy storage lithium battery is 12 string of ternary lithium batteries, and the full voltage is 50.4V, not the commonly used 24V or 48V.