anyone explain me the reason?!

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can anyone explain me the reason?! As for how to discharge: put a load across it. If you plugged your conventional charger into the battery, you would find that it will appear as if the battery is dead to you. It is not practical to remove the battery, as it is too easy to pull the magsafe chord from the socket, which instantaneously does a shut down. I am very interested in battery functions as they are becoming very expensive and the correct methods must be followed to ensure long battery life. Shouldn't it be "power"? hilsen jrgen eriksen. Hi, My battery discharged too low, and now can't even start the car. Does the long or short full charged storing period affects the batterys life? Test the battery with the quality LiPo charger, you'd find the charger recognizes it. why? I have a question. Tractor dynamo charges ok as reflected in the tractor ammeter i want to look after the battery next to improve the AH as it is not that old i am sure it is sulphated, as with the engine stopper out it will turn over for less than two minutes with a full battery.The starter motor spins fast but not for long. ( If anyone interested to help pls share your mail ID i will send you the details block,Sch&plot; images) Regards Raj, hi, i would appreciate your help if any one could help on telling me if there is ANY way to discharge a battery on a phone witch does not have a lid to open and get the battery out i need my phone to discharge since it has frozen on me, thank you. Rather than cycle count, coulomb counting may be used as a means of measuring wear and tear. BU-1005: Does the Fuel Cell-powered Vehicle have a Future? To protect the battery from over-discharging, most devices prevent operation beyond the specified end-of-discharge voltage. My question is: While using the laptop at home, should I repeatedly allow the charge to drop to 40%, then recharge to 80%, or is it ok to keep the battery, most of the time at or near 100%? please tell me also what is the best way make charger circuit for a lead-acid battery? Hi all, I am using 4v 1.5ah lead acid battery for my project. Another term that is worth recalling here is the depth of discharge. The 2C curve ends close to 3300 mah. there's a built-in safety circuit which will open and lock the battery. Stored energy is not constant in any device. Thanks in advance. Circuit diagram for 12V battery protection circuit. The electrochemical battery has the advantage over other energy storage devices in that the energy stays high during most of the charge and then drops rapidly as the charge depletes. Bought a new Olympus TG-1 I drain the LI-90B lithium battery and charge to full took 15 photos 3 days later battery failed. Please help me in this regard. I have a new ilithium-ion battery 36 V 11Ah for my e-bike What are de correct instructions for charcing and recharcing' For first use and later on for normal use. The explanation is ok, but the graphs may confuse students. We recommend posting your question in the comment sections for the Battery University Group (BUG) to share. Why do Different Test Methods Provide Dissimilar Readings? Need help! or put a seperate sulphator device direct on the battery as a permanent fixture if above how will this affect sticking on the mains 30 amp charger when the sulphator is permanently on, will the charger destroy the desulphator ? Connect the most plug of the LiPo battery to the NiMH charger. After that, we need to design a circuit in which, when the battery reaches the cut-off voltage level, a switch disconnects the load from the battery. Wh? Like on a Lithium battery. Instruction manual of the discharge test set instructed that "during a discharge the battery volts may fall to a level such that the control circuitry can no longer maintain the current constant". When the Li-ion reaches this state "the deep sleep state" only battery chargers including the boost function will be able to recharge the battery once again. BU-103a: Battery Breakthroughs: Myth or Fact? Is it better to continuosly charge it or wait for certain level of discharge and fully charge again it? The cutoff voltage should also be lowered when discharging at very cold temperatures, as the battery voltage drops and the internal battery resistance rises. Looks like a perpetuum mobile. So my question is, how w far can that that single battery discharge down to before it splits/open circuits or shorts out, Thank you in advance. It is a low power op-amp which can work in extremely low supply currents. Many Thanks! When the voltage is below 8V here, there will be no conduction through the diode and no base voltage effectively disconnecting the battery from the load. But some batteries are designed to deeply discharge regularly and these batteries are known as deep cycle batteries. Is the battery discharging? lloyd lamb: On the contrary, these specs were exactly what I was looking for. I heard once that you should never place coins near or on a Battery. Users can provide non-inverting as well as inverting input to the IC. Comments from the previous website are not compatible with our new commenting system but we have preserved them so our users can still reference and make use the information in them. Definition Is enough, Please help me create Battery Discharge form to plot the reading of battery while on discharge testing, i recently join put up comment later, Hi, I am using BQ24167 (TI) dual input charger IC & TPS2500 (TI) USB Boost converter in my charger design. BU-804: How to Prolong Lead-acid Batteries, BU-804a: Corrosion, Shedding and Internal Short, BU-804c: Acid Stratification and Surface Charge, BU-805: Additives to Boost Flooded Lead Acid, BU-806: Tracking Battery Capacity and Resistance as part of Aging, BU-806a: How Heat and Loading affect Battery Life, BU-807: How to Restore Nickel-based Batteries, BU-808: How to Prolong Lithium-based Batteries, BU-808c: Coulombic and Energy Efficiency with the Battery, BU-810: What Everyone Should Know About Aftermarket Batteries, BU-901b: How to Measure the Remaining Useful Life of a Battery, BU-902: How to Measure Internal Resistance, BU-905a: Testing Starter Batteries in Vehicles, BU-912: How to Test Mobile Phone Batteries, BU-1002: Electric Powertrain, then and now, BU-1002a: Hybrid Electric Vehicles and the Battery, BU-1002b: Environmental Benefit of the Electric Powertrain, BU-1003a: Battery Aging in an Electric Vehicle (EV). BU-501a: Discharge Characteristics of Li-ion, BU-502: Discharging at High and Low Temperatures, BU-503: Determining Power Deliver by the Ragone Plot, BU-504: How to Verify Sufficient Battery Capacity. The purpose of a battery is to store energy and release it at a desired time. Over-discharge protection using LTC2960. It can regulate a wide voltage range of 2.2V to 36V. when battery is using is it's voltage vary or current?? Hi, I have a comment/question on figure 1: What is happening over time? Most rechargeable batteries can be overloaded briefly, but this must be kept short. there's a built-in safety circuit which will open and lock the battery. and maybe using a heat exchanger in the process if i intend heating with a fluid. Please let me if there is some easy way to test this unknown battery. Image courtesy of Analog Devices. I have this unknown batter. apology? Lets explore important terms, how different batteries react to deep discharging and a simple circuit that can protect your battery-powered projects from malfunctioning. So finally we should consider Watts to calculate mah capacity reduction at high C discharge. I measured the parasitic draw. Based on this you can build up many charging profiles (IUI,WSA,) . Comparing the effect of Electrical load on a fuel cell and Rechargeable Batteries, this is a good source book that is online. This article introduces the concept of deep discharging in batteries. (but still low sound noise the present) Pls help to solve this issue. BU-410: Charging at High and Low Temperatures, BU-413a: How to Store Renewable Energy in a Battery. What is Deep Discharge? For a deep cycle lead-acid battery, the depth of discharge is 50%. This IC is widely used for power monitoring, controlling, and protection in portable battery-powered equipment and other systems. If the batterys full capacity is 15kWh and you discharge 12kWh, the depth of discharge is 96%. on a electric scooter. On the section called "Discharge Characteristics of Energy and Power Cells", I am having trouble understanding part of the concept. The battery can then be used for applications. I would like to buy a commercial battery pack discharger/charger to cycle these batteries.. Any manufacturer or websites as leads would be useful. What is the exactly definition of the charge/discharge cycle for the battery? This bandwidth gradually widens as the battery fades to provide identical driving distances. At this level, roughly 95 percent of the energy is spent, and the voltage would drop rapidly if the discharge were to continue. One needs to charge very slowly and then gradually increase the charge rate. So when the battery undergoes over-discharging, it is very difficult to recharge it because the internal resistance of the cell has increased. When the cathode voltage is above breakdown voltage, it starts conduction. Let assume Panasonic 18650B @ 0,2C discharge has 3400mah capacity at 3,6 Volts = 12,24 Watt At 2C discharge , average voltage is 3,25 Volts and 3300mah = 10,72 Watt . This is in contrast to industries requiring heavy loads and long service life. First of all, you should check the present voltage level of the battery, which is lower than the cut-off voltage. I have noticed that behavior before, but I never paid attention. Over-charging a lead acid battery can produce hydrogen sulfide, a colorless, poisonous and flammable gas that smells like rotten eggs. . I am sure if the battery was initally charged from the OCV to 3.4V. All these batteries have a pretty high price tag on them, so users should keep in mind over-discharging to protect the load and battery. This section examines discharging under different C-rates and evaluates the depth of discharge to which a battery can safely go. What I'm hearing is, very rapid charging/discharging is not good for a battery (because conditions are too far from equilibrium) and shortens the life of the battery. During a battery discharge test (lead acid 12v 190amp) 1 battery in a string of 40 has deteriorated so much that it is hating up a lot quicker than other battery's in the string, for example the rest of the battery's will be around 11,5v and this particular battery will be at 7 volts, the temperature rises to around 35degres C. (15 more than the rest. A lot of good information. (See also BU-1003: Electric Vehicle). For example, if the battery is not used for 3 months, is it better to fully charged or discharged or at what status? Read number 5 in this link Macolm. Reference to discharge cycle or cycle count does not relate equally well to all battery applications. That is why it is recommended that f the Li-ion battery was stored within the completely discharged condition, do not try to recharge them once again for safety reasons, even if you have the appropriate devices. BU-1109: Links to Cadex website and Battery University. The former would require multiple charges a day. RC buffs are well aware of the compromise and are willing to both pay the price and to encounter added safety risks. A hybrid car only uses a fraction of the capacity during acceleration before the battery is recharged.

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