Excavator battery is a device for storing electric energy. Once the external load is connected or the charging circuit is connected, it starts the energy conversion process. During the discharge process, the chemical energy in the battery is converted into electrical energy. During charging, electrical energy is converted into chemical energy. According to the function of the diesel engine starting control system and the basic working principle of the circuit, the reason why the starter cannot start may be caused by battery failure, starter failure and diesel engine electronic control system failure. The power supply system of the excavator uses the battery as the power supply and has a charging system. The alternator is driven by the engine to generate power. The charging system supplies power to all electrical equipment and charges the battery. This article will explain the misunderstanding of using the battery charge capacity of the mismatched engine when selecting the excavator battery. For reference only.
Generally, the charge capacity of the storage battery shall be selected according to the power, voltage of the starter and the load of the electric equipment. When starting the engine, the battery outputs a large current. Generally, the cold start current of the excavator and other construction machinery products is 900A, and the minimum current capacity should reach 320A when starting again. If the battery charge capacity does not match the engine, the battery charge capacity is too small. When the starting resistance is large, the reaction between the active material and sulfuric acid per unit time is bound to be accelerated in the case of severe discharge of the battery with small charge capacity. The temperature of the battery will rise and the electrode plate will bend due to overload. As a result, a large number of active materials fall off and the electrode plate is damaged early or instantaneously. Thereby greatly shortening the battery life. Therefore, it is one of the important ways to improve the economy and prolong the service life of the battery to reasonably select the charge capacity of the battery according to the engine type and service conditions.
