Burglar Alarm Batteries is your home in danger?

Have you ever noticed when there is a power cut numerous burglar alarms start sounding? When the power goes out the battery cuts in just in case someone  has cut the power to the premises to disable the alarm. As soon as the power is restored the alarm resets and no problem

The reason that alarms ring when there has been a power outage is normally because the battery is no longer working. The design life on these batteries is 5 years County Battery Services Ltd recommend they are replaced every 3 years although offer full testing services in any of their stores in Kirkby in Ashfield, Nuthall, or Ilkeston.

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How fast do lead acid batteries charge?

Firstly we need to categorise into different products;

  1. SLI (Starter lighting and ignition) Flooded Traction Semi traction, and leisure
  2. VRLA (Valve regulated lead acid) Which comprises of AGM (absorbed glass mat) and Gel (electrolyte held in a thixotropic gel)
  3. Pure Lead (Odyssey)

SLI Flooded Traction and leisure

Recommended charging at 10% of the Ampere hour rate e.g. 100 Ampere Hour battery would require 10 amps. If one assumes the battery was 80% discharged it would need 80 amps plus possibly (depends on the battery) another 10% for inefficiency to regain full charge. It makes sense to assume that 10 amps for 8.8 hours would be sufficient for a full charge. This is not the case as the voltage of the battery increases so the amperage will fall (Ohms Law) The normal “rule of thumb” that is applied in this case is 8(amps) x 10 (hours) gives 80% charge and the amount of time take to get to 80% should be added on (in this case a further 10 hours) for battery to regain a full state of charge.

VRLA batteries require a minimum of 10% and a maximum of 25% charge obviously charge quicker and tend to be more efficient so 100 Ah battery 25 amp charge rate will charge for 4 hours to 80% + 4 hours.

Pure Lead even better requiring 40% at minimum and theoretically almost no upper limit so 100 Ah battery charged at 40 amps will be at 80% in two and a half hours and fully charged in five hours. It is possible with Odyssey to take a 100ah battery charge it at 200amps and have the battery back in service in 1 hour!

It may be useful to point out that the batteries listed do tend to have different charging algorithms and advice should always be taken on the correct battery charger contact us at www.countybattery.co.uk

100 Amp Fuller Leisure Battery

Taking old electric vehicle batteries and using them to store solar energy

Here is an interesting way to use a product that is no longer of serviceable use in the product that it was designed for then recycled to do another job The question is will it work?

Part of my work at County Battery Services Ltd is to look at new and innovative products that the Company can bring to Market some time ago we launched the Powerbank a device that captures the solar energy from photovoltaic cells and stores it to be used when the sun goes down.

Old batteries and solar I think this all sound a great idea, but in reality is it feasible? If the battery has come from a crashed damaged car that is an insurance total loss then I could see it working, but the suggestion is that you take a battery that is no longer of use in a car and expect it to perform in a solar application.

I am aware that studies are being carried out no one talks about the battery life after is has left the car, It would need to be reconditioned in some way or the correct voltage could not be maintained. When ever we have swapped cells in fork truck batteries the others soon start to fail not long after and they are of low voltage with typically no more than 24 cells

The battery could be dismantled and any faulty cells could be replaced but that is a time consuming and dangerous job (400V DC). As there are lots of cells in one of these packs It would be easy to miss some, or have others fail within days of the others being replaced. It is possibly cheaper to buy a new battery and definitely more reliable.

The quest to find a cheap way to store energy I think must carry on maybe a water tower and an Archimedes Screw would be better?

How a Lead Acid Battery Works

An electrical battery is a combination of two or more cells used to convert chemical energy into electrical energy

A battery stores electricity. It develops voltage from the chemical reaction produced went two different metals are immersed in an electrolyte solution

In a battery, when a chemical reaction occurs electrons move from one pole to the other. The different metals and electrolytes used give the battery different characteristics the most significant of these is the varying voltage of the battery

A battery is made up of cells in lead acid batteries they contain lead grids onto which are pasted lead and another plate made of lead dioxide, with a sulphuric acid electrolyte into which the plates are immersed.

Lead combines with SO4 (sulphate) to create PbSO4 (lead sulphate), plus one electron.

Lead dioxide, hydrogen ions and SO4 ions, plus electrons from the lead plate, create PbSO4 and water on the lead dioxide plate.

As the battery discharges, both plates build up PbSO4 and water builds up in the acid. The voltage is about 2.2 volts per cell, for vehicle starting normally six cells are connected to produce a 12 Volt battery.

This reaction is reversible. If you apply current to the battery at the right voltage, lead and lead dioxide form again on the plates so you can reuse the battery until the active material has been depleted to render the battery unserviceable

WordPress Post

Diagram of lead-acid cell. Lead and lead oxide plates in sulphuric acid to produce about 2.2 Volts

Diagram of lead-acid cell. Lead and lead oxide plates in sulphuric acid to produce about 2.2 Volts

http://www.countybattery.co.uk/type/view/14/lihium-thionyl-chloride/

Lithium is it the answer?

There is a huge surge towards the use of lithium in batteries. The question is when the battery is finished what to do with it? At County Battery Services we sell Lithium batteries of all types and of course have the facilities to collect the old battery products and send them to the recyclers

Lithium is a very volatile metal do you remember the teacher at school demonstrating Lithium? Our teacher got a pair of tongues and pulled out a piece out of  lithium oil  dropped it into some water it reacted with the water then caught fire. Noxious substances were produced when adding it to water.It burns at up to 700 degrees C.

So bearing in mind how volatile this element is there are quite significant issues in the storage and transportation of lithium batteries both new and used. The British Post Office will not knowingly carry even a small lithium button cell. Another issue to bear in mind there are probably 50 different types of lithium based battery a lot of these with different routes to recycling and as most of the recycling is carried our abroad and more and more shipping lines are refusing to carry these products. The disposal of waste is becoming a greater and more expensive issue.

Now most people nowadays own a mobile phone normally powered by a lithium battery, is that a bomb in your pocket? Supermarkets have boxes in their windows to collect waste batteries I wonder how long it might be before one of them goes up in flames?

Is lithium the answer I am sure it probably is but we need to go through lots of learning before I will be sure!

5 x 3.6v 8500mah Lithium Thionyl Chloride ER26500 C cell batteryLithium-Thionyl Chloride 

Alessandro Volta’s Born 18th February 1745. Inventor of the battery

In 1786 the whilst biologist Luigi Galvani was dissecting a frog. Each time his scalpel came into contact with the frogs leg it twitched. Galvani believed he had discovered a new kind of electricity and called it animal electricity.

Galvani’s friend Alessandro Volta disagreed he believed that the electricity was generated when two dissimilar metals were immersed in a liquid.Volta found in his experiments the most effective pair of dissimilar metals to produce electricity were zinc and silver.

He experimented with individual cells in series, each cell being a wine glass filled with brine into which the two electrodes were dipped. The voltaic pile replaced the goblets with cardboard soaked in brine.

In a letter dated March 20, 1800, addressed to Joseph Banks, who was the President of the Royal Society of London, Volta first reported the electric pile, allegedly the first electric battery,

Borbrav, svg version by Luigi ChiesaImage:Voltaic pile.png

please follow my blog to see more or contact one of my team at www.countybattery.co.uk/contact

if you want to know more about amp hours

HOW CAN SCHOOL HELP BUSINESS’ IN MANSFIELD AND ASHFIELD?

Ambitious Futures – meeting the needs of the local business community

Monday 13 March 2017

6.00 pm – 7.30 pm

The Brunt’s Academy, The Park, Park Avenue,

Mansfield, Notts, NG18 2AT

The Evolve Trust is a Multi Academy Trust based in Mansfield there are  three academies in the Trust – Brunts (secondary), Beech (special) and Bramble (primary).  The Trust is passionate about creating opportunities for all  students to believe in themselves, achieve their potential and develop the skills needed to succeed and enjoy life.  The Trust have positive working relationship with the business community who support many fantastic careers and employability programmes which have a real impact on the life chances of our students.Image result for brunts school

I would like to invite you to a networking event, the purpose of which is to consult with the business community on employer engagement strategy:

 

–  How can the Trust work more closely together for mutual benefits?

–  Can the Trust  help you recruit your future workforce?

–  What support can be given to help with the development of your workforce?

–  Do you have projects that talented 6th formers could do for you, for example –

research, IT, social media, marketing, analysis of data.

–  How do we communicate  more effectively and listen to your concerns about education?

 

The desired outcome of this consultation is that the Evolve Trust will have a business led employer engagement strategy that impacts on the local economy and the life chances of young people across Mansfield & Ashfield.

 

Food will be provided – Buffet, Tea/Coffee

 

Cost: Free of Charge

 

Please book your place here.

 

It is essential to book your place on Eventbrite. Whilst we will always try and accommodate you, these meetings are very popular and if you do not reserve a place we do not want to disappoint you.

 

If you require any further information, please contact Richard Fuller by email.

 

We look forward to welcoming you.

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