Testing car battery health fiplab,how to choose battery for my car,battery dodgem cars game - PDF Books

29.06.2016
Our car battery maintenance infographic shows the most common causes of a flat battery and advice on how to maintain your car battery.
And I confess that up until recent years I, too, scarcely gave my automotive batteries the thought - and care - they deserve. The second purpose of the battery is to filter out voltage spikes which the electrical system can experience. Once the battery has provided the required power to the starter and the engine is running, the alternator then takes over the job of supplying all the power needed to keep the engine running as well as supplying power for all the other devices and charging the battery back up. So, essentially, the battery is constantly being discharged and recharged as its lot in life.
Very frequently a perfectly good battery will seem to be dead because lead sulfate has built up on the plates.
The second most common cause of failure is loss of electrolyte (the liquid chemical that causes electricity to flow) due to overcharging or heat. There are a few de-sulfator (or desulphator, depending on your spelling preference and the manufacturer) devices available on the market, two of which are the Battery Life Saver and the Battery Minder Plus. Now let's jump back to the actual workings and anatomy of batteries again so we can better understand what we're up against.
Conductance is a measurement of the plate surface available in a battery for chemical reaction, a determinant of the ability to supply power. A digital multimeter like this one is good for letting you know the voltage of your battery but, alas, it can't give you any indication of the overall health and life left in the battery. The rate that a battery ages is determined by operating conditions, including time in use, temperature, state of charge and vibration.


When the battery has lost a significant percentage of its ability, the conductance reading will fall well below its rating and the test decision will recommend that you replace the battery.
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This is due, in part, to the fact that today's batteries require very little maintenance and in part to the fact that the average Joe doesn't fully understand the workings of the battery and the potential problems it can have.
Oh, I'd check to make sure the water level was where it should be and occasionally wire-brush the terminals to knock off any crud or corrosion, but beyond that it was a matter of 'out of sight, out of mind'. The first is to provide power to start the engine, and in order to do this it must provide a lot of current for a short time - as much as 600 amps for 10 seconds. For example, when the starter is shut off, a -200 volt spike can occur, and large positive spikes can also occur. These crystals form naturally as a byproduct of the chemical processes that produce electricity in the battery and can seriously interfere with the power the battery puts out. By checking the electrolyte level in your battery and adding water as needed this is an easy problem to monitor and solve.
Measurement of conductance provides a reliable indication of battery health and correlates to battery capacity. Extremes in any of these conditions mean the battery's life is used up faster and that its measured conductance will decline faster.


Because conductance measurements can track the life of the battery, they are also effective for predicting end of life before the battery fails. But, as you will soon learn, there's more going on inside that heavy black box that we depend on for our cranking power than most folks imagine, so that's a good place to start. A battery in good condition can provide enough current to run the starter for a much longer period, but the starter won't be able to endure it.
The battery does a great job as a filter since it acts like a large capacitor to absorb these spikes. And also unbeknownst to most is that this build-up of sulfate crystals is the main cause of premature or unpredictable battery failure. These crystals interfere with the flow of electricity in and out of the battery, and it's estimated that 80% of the automotive batteries that are discarded each year could be recovered by removing the sulfate crystal build-up on the plates. Conductance can be used to detect cell defects, shorts, normal aging and open circuits that can cause the battery to fail.
As a battery ages and is used, the plate surface can sulfate or shed active material, which decreases cranking performance and lowers it conductance. And conductance is the required test method for battery warranty decisions at most automotive dealers worldwide. All of these products come with guarantees that they work as claimed by their respective manufacturers.



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