How to repair a battery pack battery wiki

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Batteries for power tools and other industrial devices can often be repaired by replacing one or all cells. Finding a NiCd and NiMH cell is relatively easy; locating the correct Li-ion cell can be more difficult.

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How to repair a battery pack battery wiki

  1. 1. How to Repair a Battery Pack | Battery WikiWritten by batteryfast.comWednesday, 29 June 2011 02:58 -How to Repair a Battery Pack |  Battery WikiBatteries for power tools and other industrial devices can often be repaired by replacing one orall cells. Finding a NiCd and NiMH cell is relatively easy; locating the correct Li-ion cell can bemore difficult. Naked Li-ion cells are not readily available off the shelf and a reputable batterymanufacturer may only sell to certified pack assemblers. Incorrect use or lack of an protectioncircuit could cause stress and disintegration of the replaced cell. When repairing a Li-ion packmake certain that each cell is properly connected to a protection circuit. Read about SafetyConcerns and Protection Circuits.If a relatively new pack has only one defective cell, you may replace only the affected cell. Onan aged  battery , it’s best to replace all cells. Adding a new cell with full capacity in betweenneighboring cells that have faded would cause a cell mismatch. Matching the replacement cellwith one of a lower rating may work but this fix is often of short duration. Always replace with thesame chemistry cell.A well-matched  battery pack means that all cells have similar capacities. An anomaly can be 1/4
  2. 2. How to Repair a Battery Pack | Battery WikiWritten by batteryfast.comWednesday, 29 June 2011 02:58 -drawn with a chain in which the weakest link determines the performance of the battery. Readmore about Can Batteries Be Restored?.When replacing all cells, the rating is less important as long as the differences are not too largefor the charger to handle. Cells with higher Ah will simply take a bit longer to charge.  Thestate-of-charge of all cells being charged for the first time should have a similar charge level,and the open-circuit voltages should be within 10 percent of each otherMany visitors ask if NiCd can be replaced with NiMH? Theoretically, this should be possible butcharging may be an issue. NiMH uses a more defined charge algorithm than NiCd. A modernNiMH charger can charge both NiMH and NiCd; the old NiCd charger could overcharge NiMHby not properly detecting full charge state and applying a trickle charge that is too high.Welding the cells is the only reliable way to get dependable connection. Limit the heat transferto the cells during welding to prevent excess heat buildup.Simple Guidelines when Repairing Battery Packs - Only connect cells that are matched and have the identical state-of-charge. Do notconnect cells of different chemistry, age or capacity. - Never charge or discharge  Li-ion batteries without a working protection circuitunattended. Each cell must be monitored individually. - Include a temperature sensor that disrupts the current on high heat. 2/4
  3. 3. How to Repair a Battery Pack | Battery WikiWritten by batteryfast.comWednesday, 29 June 2011 02:58 - - Apply a slow charge only if the cells have different state-of-charge. - Pay special attention when using an unknown brand of cells. Some may not contain a highlevel of intrinsic safety. - Li-ion is sensitive to reverse polarization. Observe correct polarity. - Do not charge a  Li-ion battery that exhibits physical damage or has dwelled at a voltageof less than 1.5V/cell. - When repairing Li-ion, assure that each cell is connected to a protection circuit.Other Business News: - Acer aspire 5920 battery - Acer as07b31 battery - Hp 484170-001 battery - dell latitude d630 battery CloudTag: Repair , Battery Pack ,  Battery Wiki , Acer aspire 5920 laptop battery ,  Acer as07b31 laptop battery,  Hp 484170-001 laptop battery,  dell latitude d630 laptop battery Battery Wiki Related Articles: - Tablet wars: Amazon readies tablet, RIM lowers PlayBook estimates, iPad rolls on - Laptop Battery Life Problems | Battery Wiki - Best Travel Laptops for 2011 - Mozillas Firefox 5 Goes Live, First Rapid-Release Version 3/4
  4. 4. How to Repair a Battery Pack | Battery WikiWritten by batteryfast.comWednesday, 29 June 2011 02:58 - - Troubleshooting and Maintenance Your Laptop Battery | Battery Wiki - Top 10 Easy Steps for a longer Your battery life | Battery Wiki - Battery Wiki - Tips to make your Laptop Lithium Battery Lasts longer - How To Choose the Dell Inspiron E1505 laptop battery and Care Tips - Internal Battery Design | Battery Wiki 4/4

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