What are the battery parameters of the 2.5-ton battery electric locomotive?
Nowadays, 2.5-ton battery electric locomotives are widely used in mines, so related problems are also endless. Leaving aside some of the problems common to battery electric locomotives, the unique problems of 2.5-ton battery electric locomotives mainly focus on the battery. What is the difference between several types of batteries? How to maintain the battery? Is there anything special about the maintenance of battery electric locomotives? Waiting for a lot of questions, today we will make a brief introduction on how to see the battery indicators:
Although the indicators of the battery are sometimes written in fancy, but we only need to look at the three indicators of battery capacity, operating voltage and cycle life, we can generally choose a suitable battery.
Battery capacity: As the name suggests, it is how much power it can store, which is related to battery life. Generally, the capacity unit of the battery is milliamp-hour or ampere-hour, which means the product of the discharge current and the discharge time, and the algorithm is not necessarily. For example, 10Ah can be regarded as a current discharge of 5A for 2h, or a current discharge of 0.5A for 20h. Battery capacity is divided into rated capacity and actual capacity. The former is the design capacity specified by the national standard, and the latter is the capacity of the battery after actual production. Because the actual capacity of the battery will gradually decay during use, the national standard stipulates that the capacity of the new battery should be greater than the rated capacity.
Working voltage: As the name implies, it is the voltage applied by the battery to the load, which affects whether the electric locomotive can work normally. The voltage of a single battery is generally 2V, and the electric locomotive battery is a battery pack. In order to meet the needs of various types of electric locomotives, the voltage of the battery varies from tens of V to one or two hundred V. Similar to the battery capacity, the working voltage of the battery also has the difference between the rated voltage and the actual voltage. If the actual voltage is within a certain range of the rated voltage, it is normal; if it is higher or lower, it is abnormal, which is called over-discharge or under-voltage. Taking a battery with a rated voltage of 36V as an example, if the actual voltage is within 31.5V-41V, it is normal, if it is lower than 31.5V, it is undervoltage, and if it is higher than 41V, it is overdischarged.
Discharge cycle life: As the name implies, it is the service life of the battery, but it refers to the number of charge and discharge cycles when the actual capacity of the battery decays to 70% of the rated capacity. Although it does not mean that the life of the battery has come to an end at this time, it may start to last and not meet the demand.
