Over-charging and over-discharge, lithium-ion batteries will be positive and negative result in permanent damage, from the molecular level, intuitive understanding, excessive discharge of carbon anode will lead to excessive release of lithium-ion and makes it appear lamellar structure collapsed, over – Rechargeable lithium-ion will too hard go into the negative carbon structure, causing some of the lithium-ion can no longer be released. This is why lithium-ion batteries are usually equipped with charge-discharge control circuit causes.
Not suitable for the temperature, will lead to lithium-ion Acer as07b42 battery inside the reaction of other chemical compounds that we do not want to see, so many of the lithium-ion batteries are being set up between the protective negative temperature-controlled diaphragm or electrolyte additives. In the battery temperature to a certain case, the composite membrane electrolyte membrane hole closed or degeneration, increased battery internal resistance until the circuit, the battery is no longer to heat up, to ensure that the battery charging temperature is normal.
And deep charge-discharge lithium-ion batteries can improve the actual capacity? Experts clearly told me that this is meaningless. They even said that the so-called three full charge-discharge prior to use of “activation” in the knowledge of both of them, Dr. Lane, do not understand this as a need. Why do so many people, however, after the deep charge-discharge capacity of Battery Information label will occur where a change? Will be mentioned later.
Lithium-ion batteries are generally with the management of chip and charge control chips. Which management chip in a series of registers, there is capacity, temperature, ID, charge status, discharge frequency values. These values are in use will gradually change. I personally think that the use of instructions in the “Use a month or so should put a full-charge” approach to a major role now is to fix these registers where the wrong values, making the battery charge control and the nominal capacity of the battery match the actual situation.
Charge control the main control chip, the battery charging process. Lithium-ion battery charging process is divided into two phases, constant-current fast charge phase (when the battery indicator light was orange) and constant-voltage current decreasing phase (the battery indicator light flashes green. Constant-current fast charge phase, the Dell d620 battery voltage is gradually increased The standard voltage to the battery, and then transferred to constant pressure in the control phase of the next chip, the voltage will not rise in order to ensure that no over-charge, current battery, along with the rising gradually weakened to 0, and the ultimate completion of charging.
Statistics chip power consumption by recording the discharge curve (voltage, current, time) can calculate the sample battery power, this is what we read in the Battery Information inside wh. Value. The lithium-ion batteries in repeated use, the discharge curve will change, if the chip has not been opportunity to once again read out a complete discharge curve, which is calculated out of electricity that is not accurate. So we need to deep charge-discharge to calibrate the battery chips.
For nickel-cadmium batteries, regular maintenance is regular deep-discharge: use of every month (or 30 cycles) for a deep discharge (discharge to 1.0v / per session, foreigners call it exercise), usually use is to run out of battery or shutdown and other means can be used to ease the formation of memory effect, but this is not exercise, because the equipment (such as mobile phones) will not be used 1.0v / per session before the shutdown, must be specialized equipment or line to complete this work Fortunately, a number of Ni-MH battery charger comes with this function. for a long time no exercise of the nickel-cadmium batteries, because of the cumulative memory effect, can not restore the capacity for exercise, when you need a deeper discharge (recondition, said foreigners ), which is a very small current to the battery discharge to 0.4v long each section of a process that requires specialized equipment. For the nickel-metal hydride batteries, exercise frequency to once every three months is probably a valid alleviate the memory effect. because the Ni-MH battery cycle life is far less than the nickel-cadmium batteries, with almost no recondition this method.
? Recommendation 1:
Each charge before the pairs of battery discharge is not necessary, but also harmful, because the battery life cut short unnecessary.
? Recommendation 2:
Then use a resistor to discharge the Dell inspiron 1720 battery positive and negative is not desirable, the current can not control, easy to put off 0v, even lead to series battery battery polarity reversal.
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