Battery internal resistance is introduced

Battery internal resistance is introduced

Battery (') as a standby power of the power system of a power failure, has been widely (extensive) application in industrial production (Produce), transportation, communications and other industries. Failure or if the battery capacity lack, it is possible to make into a major accident (maybe), so must be running parameters of battery (parame ter) to conduct a comprehensive on-line monitoring. Battery status is one of the important symbol of its internal resistance. Whether the battery failure, capacity is insufficient or improper charge and discharge, from its internal resistance change of xian (ti). So can pass (tong guo) measurement of battery internal resistance, to evaluate its working condition.

(') the internal resistance of Battery by ohm (Q2) polarization (conductor resistance (hold)) and electrochemical polarization and concentration polarization resistance is composed of three parts. Comprehensive tester does not need to discharge battery accurately measure the internal resistance and estimate capacity, found behind the battery in advance, to ensure the safe operation of the battery power supply system, and guide the battery in the correct parameters, prolong the service life of battery, alarm for abnormal condition. Resistance in the process of charging and discharging is change, the charging process internal resistance from large to small, vice resistance increase.

Temperature (temperature) on the battery (Bat tery) resistance is also an influential (influence), low temperature state as below 0 c (descend) 10 c drop in temperature, internal resistance increases about 15%, and by sulfur (chemical symbol: S) acid (chemical formula: H2S04) solution viscosity, and increase the resistivity (hold) is one of the important reasons. In high temperature, such as more than 10 c, sulfate ion diffusion rate increased the concentration polarization effect will decrease obviously, the polarization resistance decreased, but the conductor resistance is increased with increasing temperature, but the rising rate is smaller.

(') the internal resistance of Battery is related to the size of the discharge current, instantaneous large current discharge, due to the plate gap in sulfur (chemical symbol: S) acid solution (acid solution) rapidly diluted (dilute), outside the plate hole more than 90% sulfuric acid molecules in the solution to spread to the plate gap. Intelligent battery activation instrument with the use of three separate ways: battery discharge way, the way the battery and battery activation. Can according to the actual situation of different behind the battery, for behind the battery capacity test, intelligent charging, or set up multiple cycle times please charge and discharge cycle, with fuel battery plate failure of the active material makes cell activation, enhance behind the capacity of the battery. Battery capacity tester can through the appropriate charging process converts electrical energy into chemical energy stored in batteries inside, and the two kinds of process cycle can be more than hundreds of times. At present the standard no. 5, no. 7 rechargeable batteries mainly includes the nickel cadmium, nickel metal hydride, lithium electricity