To understand the status of the battery and maintenance methods
Battery is more traditional energy storage battery, according to the positive electrode materials can be divided into the following categories: lead-acid battery, nickel metal hydride batteries, nickel-cadmium batteries, nickel and zinc batteries, lithium batteries. Technology development today, the lithium iron phosphate as the anode material of lithium ion battery represents the most advanced, power battery to high power applications. From a user's point of view, the purpose of the battery test is to determine the battery state of health ( SOH) And the state of charge ( SOC) To determine whether to need to replace batteries, and battery testing purpose is to determine whether or not the battery needs charging. I think this is the core of battery maintenance test. At home and abroad more than a decade, the industry has been trying to find a detection method for the user, in the engineering environment, rather than in the lab. At present, the internal resistance test for the core of maintenance detection method has been widely used at home and abroad. 1. Correct understanding of internal resistance standard. Initial resistance of a battery model, it is certain, you can use the battery status within the tester for measuring the initial resistance, then stick on the battery label. ” Battery state of battery tester based on battery life, charging status, and the temperature of the test, to modify the initial resistance within, for comparison. When the internal resistance test value is higher than 40% of the initial value, can be concluded that the battery is bad or soon goes bad in the conclusion. In fact, damage to the battery internal resistance is far more than 40%, is usually more than twice. 2. Correct understanding of the inherent capacity, ability to maintain and charging status. Intrinsic capacity of the battery can store energy is maximum. Reserve capacity is the battery under the current conditions can provide energy. Charging status refers to the energy battery current actual accept how small. Insufficient inherent capacity to reduce and charge of the battery will lead to a drop in reserve capacity. The value of the holding power is we really care about. To retain ability assessment is very complex, and the concept of reserve capacity is actually a fuzzy, because people were talking about it. 1, the battery is: 1) Monomer high voltage, high energy density, the appropriate weight and volume can bring larger energy output. 2) In the rated charge and discharge rate, usage and long cycle life. 3) Adopted the harmless and the environmental protection material, environmental pollution is very low. The disadvantage is: 1) Large current charge and discharge characteristic is not ideal. 2) Right to charge discharge resistance is poor, need to fine management system. 3) Affected by temperature, high temperature performance deterioration and directly affect the capacity of lithium-ion batteries. 4) With the risk of explosion, so high temperature and high current, etc. Need multiple protection mechanism. 5) Current price is higher when maintaining capacity, is generally not in a certain discharge rate and keep capacity under certain temperature, but different discharge rate and certain temperature keeping ability is different, but it doesn't matter, we can rely on the terminal voltage rough judgment charging status, then according to the change of the inherent capacity, special battery remain capacity calculation at room temperature. Substation and the environment of communication base station temperature close to 25 °, floating charge in the state of charging status value of close to 100%. Be careful. I said is starting voltage, instead of online measurement of float charging voltage.