Do you really know the laptop batteries?
What kind of batteries stored in better conditions
?
According to IEC standard requirements, the battery should be at a temperature of 20 5 ', humidity (65 20)% under the conditions of storage. In general, the higher the temperature the battery storage capacity remaining, the lower the rate. On the contrary, is the same. Refrigerator temperature is 0 ' -10 ', when the best place for storage batteries. Especially for a battery, while the secondary battery even after the loss of storage capacity, but as long as the re-charge and discharge times can resume.
How long the battery can store?
On the theory, the laptop battery storage when the total energy loss. Inherent in the electrochemical cell structure determines the battery capacity of inevitable loss, mainly due to the self-discharge caused. Usually the size of the self-discharge in the electrolyte in the cathode material and its solubility after heat instability (easy to self-decomposition) of the. Rechargeable batteries self-discharge of a battery than the high. The
hp dv2000 battery types, battery-month self-discharge rate is not the same. Generally 10-35% change. A battery self-discharge is significantly lower, at room temperature does not exceed 2% per year, with the self-discharge during storage is accompanied by increase in battery internal resistance, which can cause the battery to reduce power load, while in the discharge current is larger cases, the energy loss of a very significant change, the following table lists the self-discharge under normal storage conditions of the approximation:
Type of self-discharge
Alkaline manganese batteries MnO2/Zn round 2%
Zinc-carbon batteries MnO2/Zn Round "4%
Lithium-ion Li-MnO2 batteries and button batteries circle about 1%
Ni-Cd / Ni-MH Batteries "35% of
What is a short-circuit? What impact on the battery performance?
The battery connected to the outer ends of any conductor would lead to an external short circuit.
Batteries of different types, short-circuit may be the consequences of various degrees. Such as: electrolyte temperature rise, internal pressure rise, such as air pressure cap if more than the battery voltage value, the laptop batteries will be leakage. This situation has severely damaged the battery. If the safety valve failure, or even cause an explosion. So Do not short-circuit the battery externally.
What is memory effect? Way to eliminate the memory effect?
Memory effect is the case for the nickel-cadmium
dell inspiron 1525 battery, because of the traditional sintering process is extremely negative, cadmium and coarse grains, if the nickel-cadmium battery is fully discharged before they are re-charging, easy to gather Manifold Ershi grain cadmium battery discharge to form secondary discharge plateau. Discharge the battery will be stored in this platform and in the next cycle will end as a discharge, although the capacity of the battery itself, can make the battery discharge to a lower platform. In the subsequent discharge process in the battery will only remember the low volume. Similarly, every time you use, any one not fully discharge all will deepen this effect, so that the battery capacity becomes lower.
To eliminate this effect, there are two ways, first using small current depth of discharge (such as put by 0.1C to 0V); First, using a large-current charge-discharge (for example, 1C) several times.
There zero-voltage or low toshiba laptop battery voltage may be what are the reasons?
(1) battery subjected to an external short circuit, overcharge or reverse charge (forced over-discharge)
(2) batteries subject to continuous high-rate high-current overcharge, causing the battery very core expansion, direct contact with the positive short-circuit
(3) battery internal short circuit or a micro-short circuit, such as: positive and negative pieces of paper with burr contact with membrane-penetrating short-circuit, positive and negative film placed incorrectly, resulting in a very short film exposure, or contact sheet steel cathode short circuit, the negative electrode material into the separator paper out , separator paper itself is flawed, positive contact with a very negative piece short ears.
Zero-voltage or low battery voltage of the possible reasons for what?
(1) whether a single cell zero-voltage branch
(2) plug short circuit, open circuit or bad connection with the plug
(3) lead and battery Sealing-off or a cold solder joint
(4) batteries internal connection error, the connection between the chip and battery drain welding, cold solder joint, Sealing-off, etc.
(5) The electronic components inside the battery connection is not correct or damaged
Can not be recharged battery into the battery power may be What is the reason?
(1) battery to zero voltage or zero-voltage battery in the battery pack
(2) The
HP dv6000 Battery pack connection error, the internal electronic components, protection circuit abnormalities
(3) The charging equipment failure, no output current
(4) External factors leading to the charging efficiency is too low (such as low or high temperature)
Battery Group is unable to discharge the possible reasons for that?
(1) battery after the storage, use, lifetime decay
(2) The charge or charge less than
(3) The ambient temperature is too low
(4) The discharge efficiency is low (such as the large current discharge due to internal material and the proliferation of normal cells fast enough reaction speed, causing a sharp drop in voltage electricity can not be released).
Why does the battery is fully charged when the temperatures soar? Voltage dips Why?
When the nickel-cadmium rechargeable battery is fully charged before continuing fall-off charge, due to the positive Ni (OH) 2 has been almost completely converted to NiOOH, cell potential at this temperature reaches a balance of value (max), this time outside the constant current overcharge to OH-oxidation produces the oxygen.
Chemical Reaction: 4OH-- e ' O2 + 2H2O + heat
The production of oxygen through the separator paper and the negative cadmium compound produced:
2Cd + O2 ' 2CdO + heat
The combination reaction generated a lot of heat, but the battery temperature of the entire system. Therefore, at this time there is a sharp rise in temperature phenomenon. And because the higher the temperature the lower the equilibrium potential of the battery, it will inevitably lead to cell equilibrium potential temperature dropped, so at this time there is the battery voltage dips phenomenon.
Convex belly drum at the end of the battery leakage or the possible reasons for what?
(1) The battery is overcharging, especially high-magnification high-current continuous overcharge
(2) The battery is forced over-discharge
What is the explosion of the battery How to prevent battery explosion?
The battery inside the moment any part of the solid material discharged from the batteries were pushed up to more than 25cm distance, called the explosion. Determine whether or not the battery explosion, using the following conditions experiment. Will be a net covering the test battery, the battery lives in the middle, away from the net on either side of the hood 25cm. Net density of 6-7 roots / cm, network cable with a diameter of 0.25mm soft aluminum, if the experiment without solid part through the network mask to prove that the did not explode.
Do you really know the laptop batteries?
By: jackwu
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