Do you know what are the wrong ways to use the battery?

1. When batteries are mixed in series in battery use, sometimes new and old batteries are used in series. As everyone knows, this practice will shorten the service life of the battery. Because there are more chemical reaction substances in the new battery, the terminal voltage is higher, and the internal resistance is small (the internal resistance of the new 12V battery is only 0.015-0.018); while the terminal voltage of the old battery is low and the internal resistance is large (the internal resistance of the old 12V battery is only 0.015-0.018). Resistance is above 0.085). If the new and old batteries are mixed in series, the charging voltage at both ends of the old battery will be higher than the charging voltage at both ends of the new battery in the charging state. As a result, the new battery has not been fully charged and the old battery has been charged too high; in the discharged state , Because the charge capacity of the new battery is larger than the charge capacity of the old battery, the result is that the old battery is over-discharged and even the old battery is reversed. Therefore, the new and old batteries must not be mixed. 2. Diesel vehicle battery cell is damaged and continue to be used. Because the diesel engine compression is relatively large, the required starting torque is also large, so the general diesel engine is started with 24V voltage to increase the specific power of the starter, but the generator and the whole vehicle The electrical equipment still uses 12V voltage, so the diesel vehicle circuit is equipped with a voltage switch. When starting, the switch connects two 12V batteries in series and supplies power with 24V voltage. In the non-starting state, the switch restores the two batteries. To work in parallel to meet the requirements of 12V voltage. But when a cell of one of the batteries is damaged, some drivers will short-circuit it and continue using it. This will cause a larger discharge current and charging current due to the unequal voltages of the two batteries, resulting in damage to the battery and the generator. Therefore, if the battery cell on the diesel vehicle is damaged, it should be replaced or repaired immediately, and the single cell battery can not be used after short-circuiting. 3. The battery charge capacity does not match the engine. The rational selection of the battery charge capacity according to the engine type and operating conditions is one of the important ways to improve the economy of the battery and prolong its service life. When the starter starts the engine, the battery output current is very large, under normal circumstances it is 150A-200A, and the output current is as high as 250A-300A when starting at low temperature (-10℃). If the battery charge capacity does not match the engine, and the battery charge capacity is too small, when the starting resistance is large, the battery with a small charge capacity will accelerate the reaction of the active material and sulfuric acid per unit time and increase the battery temperature when the battery with a small charge capacity is violently discharged. High, the electrode plate is bent due to overload, resulting in a large amount of active material falling off, and the electrode plate is damaged early, which greatly shortens the battery life. If the charge capacity of the battery is too large, although the above-mentioned problems will not occur, its active material cannot be fully utilized, which will reduce the battery economy. Therefore, the charge capacity of the battery must match the engine. Generally, the choice of battery charge capacity should be based on the power, voltage of the starter and the load of the electrical equipment. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages and disadvantages of fuel-powered batteries and lithium batteries?