AGV lithium battery selection 6 aspects

How to select an appropriate AGV lithium battery?We concluded 6 aspects for selection.

AGV lithium battery is currently a relatively more intelligent handling robot, mainly instead of manual labor to complete some heavy lifting work, mostly used in logistics warehouses, large storage, production workshops and other scenarios, and at present, the lithium battery of the AGV is basically the use of ternary lithium batteries and lithium iron phosphate batteries. These two types of lithium batteries are used for AGV intelligent robots have their own advantages and disadvantages, the main aspects of which are reflected as follows:

A. the advantages and disadvantages of ternary lithium batteries:

Advantages are high individual voltage, light weight, good ultra-low temperature; disadvantages are short cycle system cycle, poor reliability. Its individual rated voltage is 3.6-3.7V, and the working voltage is 3.0V-4.2V.

B. lithium iron phosphate battery advantages and disadvantages:

Advantages are high safety factor, and longer cycle system life; disadvantages are low specific energy, the whole battery is heavier. Its individual rated voltage is 3.2V, and the voltage in work is 2.5V-3.65V.

So how should we select the AGV lithium battery? We can analyze the communication protocol, voltage, net weight, application operating temperature, safety factor, cycle system life and other aspects of the battery, can more accurately determine what model and specifications of the battery.

1. communication protocol

At present, the communication protocols of AGV lithium battery are: RS485, RS232, CAN, according to the communication protocol to select the battery BMS control module.

2.Voltage

Need to take into account the rated value of the output voltage and the maximum voltage, clarify lithium battery voltage and raw materials. The rated voltage of the battery cannot be less than the rated voltage of the motor. The full-scale electric voltage of the battery can not be higher than the maximum voltage of the machine and equipment. This is why we sometimes see the AGV battery voltage is 50.4V full-cell voltage of 12 series lithium ternary batteries, rather than the common 24V or 48V.

3.Power consumption

If the power consumption or power charging and discharging, lithium battery volume exceeds 1.5 degrees of electricity, in the net weight and specifications can be achieved, it is recommended that the choice of lithium iron batteries, which is based on the consideration of the application of the safety factor.

4.charge and discharge output power, battery charging output power

If the charging and discharging power flow has more than 60A, it is recommended to use LiFePO4 battery. All normal batteries are applicable to 0.5C battery charging is more common goods. However, in specific applications, many AGV working conditions provide for the application of 2C high-speed charging, the reason is that many processes to carry out charging and discharging, and traveling to a special battery charging process, the time is very short, the provisions of the large flow of 2C rapid charging, to achieve a cyclic system of charging and discharging applications.

5. the application of the natural environment

Such as working in high temperature or real-time road conditions more extreme natural environment, lithium iron phosphate battery can be used. Special ultra-low temperature conditions can be used ternary lithium batteries.

6.manufacturers

As to consider the cost of AGV lithium battery project cost, after-sales service costs and delivery of the accident in the middle of the situation, first of all, we must choose a professional AGV battery manufacturer to customize. Secondly, AGV batteries mainly look at the battery cell, BMS template (especially with communication protocols), assembly and processing technology. In addition, the battery cell should be used with genuine branded battery cell, and the BMS plan scheme needs to pick a first-tier manufacturer. Assembly processing process is best to use new energy technology bus lithium batteries, can ensure shock resistance, as well as to avoid accidents in the process of transportation and placement.