The company has a group of cooperation teams engaged in the Ni-Cd Battery Cell industry for many years, with dedication, innovation spirit and service awareness, and has established a sound quality control and management system to ensure product quality.
Memory effect refers to a temporary or permanent loss of capacity in a battery when it's discharged. Experts don't totally agree on why this happens or how to keep it from lessening the capacity of batteries.
Analysts at Frost & Sullivan Inc. in Houston say the phenomenon occurs most often in nickel-cadmium (Ni-Cad) cells, when they're discharged to a certain point and recharged a successive number of times. They say you can avoid memory effect by discharging the cell completely during each use and before recharging it.
But what memory effect is has been a point of confusion, some experts say. "Memory effect has become a catch-all phrase for any bad experience associated with battery products," says Paul True, president of NRG Research Inc. in Grants Pass, Ore., which makes Ni-Cad cells.
True says memory effect usually refers to voltage depression, which is an abnormal dip in discharge voltage. It slowly progresses from the end of a discharge cycle toward the beginning over the life of a cell. If the equipment being powered has a preset shut-off point, it may mistake the voltage dip for an empty cell and shut down prematurely.
Voltage depression is primarily caused by overcharging a Ni-Cad cell, True says—when a charging device fails to sense when a charge is complete, coupled with a demand for shorter charge times. But True says he believes that discharging the cell fully and recharging it can easily erase the voltage depression, echoing the advice given by Frost & Sullivan. The discharge needs to be down to less than 1 volt per cell, he says.
The life expectancy of most batteries subjected to a full discharge is shorter than that for cells subjected to shallow charge and discharge cycles, True says. That presents a dilemma for users: either discharge fully and shorten battery life or discharge less than fully and face memory effect. Some manufacturers now offer overcharge-tolerant cells and better charging systems to help resolve the issue.
True says he believes memory effect isn't really a problem for today's Ni-Cads in cell phones, since their chargers are more precise in preventing an overcharge. The memory effect was a bigger concern several years ago, when Ni-Cads were introduced for video equipment batteries as an alternative to lead-acid batteries. For professional video equipment, when cells hold a large charge and can be charged at fast rates, voltage depression can be a concern and more precise charging devices are necessary, True says.
"But for the most part, memory effect doesn't impact the average cell phone or appliance user any more," he notes.
With high quality products and considerate service, we will work together with you to enhance your business and improve the efficiency. Please don't hesitate to contact us to get more details of Ni-Cd Battery Cell.
RPET Material Rpet Fabric Clutch Release Bearing rubber oil seal Coal preparation plant process Coal Washing Plant Supplier Fully Automatic Pallet Wrapping Machine polyurethane sandwich panel how to use caustic soda for cleaning Intalox Metal Saddle Ring Metal To Metal Ball Valve Clad Head For Pressure Vessels Water Curtain Movies Design Fiberglass Window Screen Stainless Steel Dutch Wire Mesh lora gps tracker