Lithium iron phosphate battery assembly is analysed

Source: 2020 - 04 - 06 12:17 hits: assembling 1 time preventive measures. 48 v / 12 ah lithium iron phosphate battery module of external size than normal 'T' type and 48 v 12 ah lead-acid battery pack is small, the height of the CMM, 33 can be loaded directly. In order to prevent the battery components move up and down inside the box, box used foam filling the gap. Because the space is lesser, at the top and bottom of the battery module best cushion elastic good obturator rubber plate, to prevent the loss of elasticity, due to large stress, damage to the battery. If the battery with this department, need add a layer of rigid insulation board here. Proved: if the battery at the bottom of the filling polystyrene foam board, polystyrene foam plate elasticity will quickly disappear, cannot have the effect of damping. 2. Module is usually placed in the upper of the battery charging and discharging control board, the back ( Solder joints) Usually covered a layer of paper insulation. For reliable, had better be in on the insulation layer coated with the same size thin phenolic plate, and then use the adhesive tape should be fixed on the battery pack. 3. In order to prevent the battery components are the rain soaked, Especially the charging and laying control panel) , battery components should cover several layers of appropriate to the size of the plastic bags. Due to the original design of the 'T' box used in lead-acid battery, there is gap, poor waterproof performance. In order to prevent the rain down the battery into the battery components, lead battery components all lead down to reach the bottom of the battery pack, then connected up to charge and discharge outlet. If the wire length is not enough, should be appropriately extended, but must join point welding, the external insulation must be strictly. Short circuit between lines. In addition, the extension of lead core area should not be lower than the original lead battery components. Welding filler, socket, in order to prevent short circuit between lines, must be completed after a solder joints, then stripped off the other end of the insulating casing, another solder joints. Each wire connection must be accurately correspond to socket on the electrode. After assembly of the battery can be directly replace the original lead-acid battery, do not worry about the lithium iron phosphate battery discharge voltage is too high, also do not meet the requirements of electric vehicles. In fact, 48 v lead-acid batteries voltage of 58. 8 v, and the highest voltage lithium iron phosphate battery is only 58. 4v。 Lead-acid battery switch to the lithium iron phosphate batteries, the only drawback is that the original car lost reference value of the indicator, difficult to use. This is because, lead-acid battery discharge is a diagonal line, and lithium iron phosphate battery discharge curve is basically flat, close to the end, once the discharge voltage drop suddenly, battery protection immediately into the state, discharge stop immediately. Unlike lead-acid batteries, battery after the under-voltage warning lights up, can continue to discharge under low voltage for a period of time. Therefore, in order to use convenient, had better install the odometer in the car, so that in the process of unloading. Found in the actual application, the same capacity of lithium iron phosphate batteries are not longer than lead acid battery. Estimation and battery capacity or virtual standard charger. Basing on buying 'to' all 'A' product of lithium iron phosphate battery module as an example, with 2. 5 a dedicated charger as a gift for charging, charging time is 4 hours 47 minutes. Battery capacity is only 11. 7 ah, according to the electrochemical conversion efficiency is 100%, not to mention the electrochemical conversion efficiency cannot be reached to 100%. In addition, according to the manufacturer's recommendations, the battery before use do not need to be recharged many times. Doing so will not increase the battery capacity, also won't have any other benefits. Compared with the lead-acid battery, its biggest advantage is: light weight, only 1/5 of the lead-acid battery; Long service life and charge and discharge the battery capacity in 2000 amounted to 60% of the original; Waste after non-toxic, does not pollute the environment. It should be pointed out that, low temperature had a great influence on the lithium iron phosphate battery discharge ability. 72% of the normal temperature, when 5 ℃ - 10 for the normal temperature of 66 ℃. 4%, - Only 50% of that in the normal temperature of 20 ℃.