Cell phone lithium battery is an important part of the phone, its function directly affects the use of cell phones, so it is necessary to understand the basics of cell phone lithium battery. In addition to the use of cell phone lithium battery should not be overcharged and overdischarged, the battery short circuit, high temperature and other factors will also affect the function of cell phone lithium battery. In addition to some basic knowledge of the battery and parameters, tests can also be more understanding, to help better maintain the cell phone lithium battery, supply battery life.
Elements that affect the function of the lithium battery
Battery short circuit: short circuit will bring different degrees of results to the cell phone lithium battery, such as elevated electrolyte, internal air pressure, battery leakage night, etc.. The outer two ends of the battery connected to any conductor will form an external short circuit, damaging the battery function, once the safety valve fails, it may also cause the battery to explode, so do not let the battery external short circuit.
Temperature is too high: temperature is one of the environmental elements that affect the function of the battery, the charge and discharge function of the cell phone battery is the greatest impact. The electrochemical reaction and transmission speed of the cell phone lithium battery are related to the ambient temperature, when the temperature rises / falls, the electrode reaction rate, transmission speed will also rise / fall, and then affect the charge and discharge function of the battery. Therefore, the temperature of cell phone lithium battery in use should not be too high.
Cell phone lithium battery basics science
The capacity of cell phone lithium battery refers to the electric energy that can be released by the active material in the battery participating in the electrochemical reaction. Cell phone lithium battery after a period of time will find that the battery discharge time is getting shorter and shorter, the reason for this situation may be that the battery is not full, such as charging time, charging power is low; battery discharge current is too large, resulting in a decline in discharge power, so the discharge time is shortened; battery discharge temperature is too low, resulting in a decline in battery discharge power.
Cell phone lithium battery is divided into static resistance and dynamic resistance, equivalent to the internal resistance of the battery when discharging and charging internal resistance. Cell phone lithium battery also has a charging power and discharge power, charging power refers to the battery in the charging process, the consumption of electrical energy into chemical energy measurement; discharge power refers to a certain discharge conditions, the actual power released by the voltage and the ratio of additional power.
Cell phone lithium battery charging power is mainly affected by the battery process, formula and working environment, generally the higher the temperature, the lower the battery charging power; and discharge power is mainly affected by the discharge rate, environment, internal resistance and other elements, the higher the discharge rate, the lower the power of discharge, the lower the temperature, the lower the discharge power.
Cell phone lithium battery parameters test
The parameter test of cell phone lithium battery is based on the general specification rules. Cell phone lithium battery has overcharge maintenance, over discharge maintenance, short circuit maintenance and discharge function test.
Cell phone lithium battery in the overcharge, over discharge, short circuit test, the battery can not present smoke, fire, explosion, liquid leakage, leakage and other phenomena. There are two modes of discharge function test: 0.2C5A and 1C5A, when conducting 0.2C5A discharge test, the rule moment is not less than 5 hours; when conducting 1C5A discharge test, the rule moment is not less than 51 minutes.
Cell phone lithium battery in doing the function test, generally need to use the medium that can transmit current. For example, the high-current shrapnel micro-pin module can pass the current within 1-50A in the cell phone lithium battery test, and play a good articulation function; and in the field of small pitch has a reliable response, in ≤ 0.2mm pitch to maintain stable articulation, not stuck pin, no needle. Stable function of the articulation module is conducive to the progress of cell phone lithium battery test power.
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