One is the "charge transfer", which is the actual chemical reaction taking place at the interface of the electrode with the electrolyte and this proceeds relatively quickly.There are in fact at least three key processes involved in the cell chemical conversions. This is particularly noticeable in high capacity cells which contain a large volume of electrolyte. The chemical action can not take place instantaneously and there will be a reaction gradient in the bulk of the electrolyte between the electrodes with the electrolyte nearest to the electrodes being converted or "charged" before the electrolyte further away. This simple additional safety precaution is particularly important for high power batteries where the consequences of failure can be both serious and expensive.ĭuring fast charging it is possible to pump electrical energy into the battery faster than the chemical process can react to it, with damaging results. The temperature signal, or a resettable fuse, can be used to turn off or disconnect the charger when danger signs appear to avoid damaging the battery. Elevated temperatures hasten the death of batteries and monitoring the cell temperature is a good way of detecting signs of trouble from a variety of causes. Internal fault conditions within the battery or high ambient temperatures can also take a battery beyond its safe operating temperature limits. If for any reason there is a risk of over charging the battery, either from errors in determining the cut off point or from abuse this will normally be accompanied by a rise in temperature. This is particularly important with fast chargers where the danger of overcharging is greater. In the simplest of chargers this is when a predetermined upper voltage limit, often called the termination voltage has been reached. Detecting this cut off point and terminating the charge is critical in preserving battery life.
The essence of good charging is to be able to detect when the reconstitution of the active chemicals is complete and to stop the charging process before any damage is done while at all times maintaining the cell temperature within its safe limits. The result is the generation of heat and gasses both of which are bad for batteries. Once a battery is fully charged, the charging current has to be dissipated somehow. The charging scheme is a combination of the charging and termination methods. Optimising the charging rate (Stabilising).Getting the charge into the battery (Charging).More batteries are damaged by bad charging techniques than all other causes combined. Woodbank does not monitor or record these emails
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