Battery chargers are used to recharge batteries which, after discharge, can be restored to a fully-charged state. Rechargeable batteries or secondary cells differ in terms of design and chemistry. Iron electrode batteries feature good energy density and low self-discharge, but have a low efficiency and provide poor low-temperature performance. They are more expensive than lead acid batteries, a type of rechargeable battery that accounts for almost 60% of all batteries sold...
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Q & A on Battery Chargers

We asked our users for their input on Battery Chargers. Here are the results of 183 users familiar with Battery Chargers.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing battery charger design?
29 answers
Answers:
Power semiconductor improvements. Low cost DSP / uControllers. Smart charging chips from TI & Linear and others. Integration technology like SMBus.
~Engineer, Cape Canaveral, FL
Virtually all modern battery chargers are based on switch mode power supply design. This is due to the spread of maintenance free battery technologies.
~David W, Engineering Consultant, Stafford, UK
The use of on-board charging in electric vehicles has required a reduced footprint to allow these to be packaged within the vehicle.
~Engineering, Design, Glasgow, Great Britain
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Q:
From your perspective, which companies are creating the most innovative battery chargers?
21 answers
Answers:
Hawker - Enersys Beady Eye - South Africa - Natal - Durban very good charging systems. 031 - 7005940 - Len Fish you can use my name for reference
~SELVAN S, General Management, DURBAN, SOUTH AFRICA
Many are made in China and don't have manufacturers names on many of them, but I like MTronics and Uniross
~Birmingham, Great Britain
In UK, Eltek have some of the most versatile systems.
~David W, Engineering Consultant, Stafford, UK
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Applications and UseTop

Q:
What are some of the applications you have used battery chargers for?
45 answers
Answers:
Mostly heavy equipment, 12 and 24 v systems, as of the last four years I have been living off grid, with a 48 volt system. Properly charging and desulfanating the batteries and keeping them tip top is a priority. I have also worked with trying to RESTORE dead and really tired batteries, with some limited successes.
~Jay K, Owner/ RD chief/ purchaser,
12/24 Volt back up charger for Main Engine control 12/24 Volt back up charger for propulsion control 48 Volt control for MOB vessels 12/24 Volt Emergency back up ship radio stations UPS 12/24 Volt Sattelit comunication systems 12/24 Volt back up fire alarm systems 12/24 Volt back up for purge systems in Ex area
~J S, Project Manager, Esbjerg, Denmark
- 110V DC supply for SWGR control power at an airport's fuel supply system. - 24VDC and 48VDC for platform's main control unit and field instrument.
~Engineering, Design, Jaksel, Indonesia
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Q:
Please share with us any “non-standard” applications that battery chargers have been used for.
16 answers
Answers:
Some years ago, Jaguar found that their car batteries were severely discharged at the end of the production line and had to be recharged before the cars could be shipped or stored. I introduced special high cycling batteries which were used on the production line then replaced with new standard batteries for shipping. The production line batteries were recharged then cycled back through production.
~David W, Engineering Consultant, Stafford, UK
I have used a charger to desulfinate and clean batteries. Just manually adjust the output, 50 amp to 20 amp then to 225 amp then to 2 amp to clean and recharge weak batteries. I also use the charger as a 12 v power source when needed to run certain pieces of 12 volt equipment.
~Jay K, Owner/ RD chief/ purchaser,
A prototype was designed and built tailored to our traction battery system.
~Johnson Sung, Research & Development, Taipei, Taiwan
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Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of a battery charger?
16 answers
Answers:
The use of the Low voltage disconnect (LVD) can lead to intermittent dc output . This can be detrimental to the operation of telecommunications equipment ; especially the Teleprotection equipment for high voltage overhead lines.
~Idris Md Saleh, Technical Support, Kuala Lumpur, Malaysia
Most problems occur due to poor battery maintenance. Connecting a battery charger with too high a voltage to a battery can, and has, caused the battery to overheat and explode.
~David W, Engineering Consultant, Stafford, UK
Wrong polarity connections, under rated chargers resulting to total failure of the complete system with consequences of tied up expensive components rendered in-operative.
~Gregory K, Technical Specialist, Cold Chain, Copenhagen, Denmark
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FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
24 answers
Answers:
A charger that would have the ability to sense which cell is not right. Also a programmable unit that could bulk, sustain, and float, trickle charge. Taking one battery or a bank of batteries and charge them to the maximum capacity. Having the ability to FAST charge a battery would be great.
~Jay K, Owner/ RD chief/ purchaser,
Charger system to accept two redundant Ac input Input Ac supply to be protected with anti surge devices Full circuit diagram with components list to be provided for easy repairs Use of isolation transformers for the AC input side.
~Idris Md Saleh, Technical Support, Kuala Lumpur, Malaysia
A multi voltage output battery charger with high range of input voltage. It will charge some battery banks with different voltage and automatically choose which battery will be charged in a time.
~Engineering, Design, Jaksel, Indonesia
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Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of battery chargers?
16 answers
Answers:
Make sure the application matches the charger. If the charger is for switchgear make sure you don't use a charger for telecom. Some sites have a SCADA and the telecom charger will not operate the SCADA arm properly.
~Rick S, Owner, Liberty Township, OH
Always make sure you are connecting the correct polarity when connecting battery charger to batteries and always make sure of the correct capacity.
~Marwan Alali alshbiakat, Projects Engineer, Jordan
My advice to help other battery charger user is to purchase genuine devices and use them as instructed in the manual.
~Ogwang Romano Salim, Electician, Gulu, Uganda
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Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using battery chargers?
16 answers
Answers:
Someone once said : "Any man can make something a little worse and sell it a little more cheaply. Those who consider price alone are this man's lawful prey". Don't go for the cheapest - go for the best your application can afford.
~Mike G, General Management, Leeds, UK
Battery chargers should have temperature compensated charging. Sealed Lead Acid batteries should not be "Boost charged" since it will lead to gassing and plate deterioration.
~Idris Md Saleh, Technical Support, Kuala Lumpur, Malaysia
Often there is always a mismatch especially for low rated chargers used for heavier loads. Consulting experts is recommended.
~Gregory K, Technical Specialist, Cold Chain, Copenhagen, Denmark
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