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Lithium battery rival

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Lithium-ferro phosphate (LFP) batteries – a lithium battery rival

Lithium-ion and lithium-iron-phosphate (a lithium battery rival) are two types of rechargeable batteries. They share some similarities but differ in high-energy-density, long life-cycles, and safety. Lithium-ion is used in smartphones and laptop PCs. Lithium iron phosphate (LiFEPO4) is that used in RVs etc.

Lithium-iron phosphate is cost-effective and more stable at high temperatures. Lithium-ferro phosphate (LFP) batteries may prove a lithium battery rival. It increases the choice of chemicals for battery production. It also reduces reliance on the more expensive, and difficult to produce, lithium hydroxide.
If LFP sells as hoped, the lithium used will reduce. The lithium chemical of choice is then likely to change from lithium hydroxide to carbonate. It will also enhance flexibility in the chemicals for battery production. It will also reduce reliance on the more expensive, and difficult to produce, lithium hydroxide. The lithium used per kWh of storage capacity will reduce. Furthermore, the lithium chemical of choice will trend from lithium-hydroxide to carbonate. An even more compelling outcome is the use of lithium phosphate as a cathode powder precursor.

Lithium battery rival chemistries

Charge and discharge rates of a battery are governed by C-rates. The capacity of a battery is commonly rated at 1℃. This means that a fully charged battery rated at 1 amp-hour should provide one amp for one hour. The same battery discharging at 0.5℃ should provide 0.5 amp for two hours. At 2℃ it should provide two amps for 30 minutes.

Lithium-ion

Lithium-ion can consist of two different chemistries for the cathode: lithium-manganese oxide or lithium-cobalt dioxide. Both have a graphite anode. Lithium-ion has a specific energy of 150/200 watt-hours per kilogram and a nominal voltage of 3.6V. Its charge rate is from 0.7℃ up to 1.0  C. Higher charges can significantly damage the battery. Lithium-ion has a discharge rate of 1℃.

Lithium-iron phosphate (LiFePO4)

Lithium-iron phosphate has a cathode of iron phosphate and an anode of graphite. It has a specific energy of 90/120 watt-hours per kilogram and a nominal voltage of 3.2 -3.3 volts. The charge rate of lithium-iron-phosphate is 1℃. The discharge rate is from 1 to 25℃.

Lithium battery rival – energy level differences

There are significant differences in energy when comparing lithium battery rivals (lithium-ion and lithium-iron-phosphate). At 150/200 Wh/kg, lithium-ion has a higher energy density. This is handy for power-hungry tools etc., that drain a battery at a high rate. The available discharge rate for lithium-iron-phosphate, however, exceeds that of lithium-ion.

Lithium battery rival – life cycle differences

Lithium-iron-phosphate has a lifecycle of 1000-10,000 cycles. These batteries can handle high temperatures with minimal degradation. They have a long life for applications that need to run for a long time between charging.

For lithium-ion, the higher energy density makes it less stable. this is especially at high operating temperature environments. Heat also shortens its life cycle.

Long-term storage benefits

Both lithium-iron-phosphate and lithium-ion have good long-term storage benefits. Lithium-iron-phosphate can be stored longer as it has a 350-day shelf life. For lithium-ion, the shelf life is roughly around 300 days.

Safety advantages of lithium-iron-phosphate

Lithium-iron-phosphate has excellent thermal and chemical stability. Such batteries stay cooler in higher temperatures. It is also incombustible if mishandled during rapid charges and discharges or short circuit issues. Lithium-iron-phosphate does not normally experience thermal runaway. The phosphate cathode will not burn or explode during overcharging or overheating.

Another safety advantage of lithium-iron-phosphate involves the disposal of the battery after use or failure. A lithium-ion battery made with lithium-cobalt-dioxide chemistry is potentially hazardous. It can cause allergic reactions to the eyes and skin when exposed. Special disposal considerations must be made. Lithium-iron-phosphate is non-toxic. It can be disposed of more easily.

Applications for lithium-iron-phosphate and lithium-ion

Lithium-iron-phosphate is suitable for applications where safety and longevity are desired but do not need an extremely high energy density. Examples include solar energy storage and RVs. Such batteries are, however, slightly heavier as well as bulkier than lithium-ion.

Lithium offering a range of benefits

Advances in battery technologies have placed lithium as currently the best power source for portable high energy use devices. It’s long shelf life, and ability to provide a continuous source of power over long periods of time is why both lithium-ion and lithium-iron-phosphate are reliable alternatives.

Currently, lithium batteries cost more than nickel-metal hydride and nickel-cadmium batteries. The long life of lithium batteries, however, can equal out initial high costs. Key factors are:

  • Highest energy density: lithium-ion
  • Good energy density and lifecycle: lithium-iron-phosphate
  • Stable chemical and thermal chemistry: lithium-iron-phosphate
  • No thermal runaway and safe when fully charged: lithium-iron-phosphate
  • Portability and lightweight characteristics: lithium-ion
  • Long life: lithium-iron-phosphate and lithium-ion
  • Low costs: lithium-iron-phosphate

The operating environment needs also to be a consideration as well as any vibration issues. For RVs, for example, the chemical stability of lithium-iron-phosphate (i.e.LiFePo4) is superior to that of lithium-ion.

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Cover of How to Choose and Buy an RV by Collyn RiversWhether you’re buying your first RV or updating to a bigger, more comfortable rig, there are a great many things you need to know and consider. How to Choose and Buy an RV breaks things down so that you can decide what you want and whether or not what you’ve found is right for you.

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Cover of The Caravan and Motorhome Book by Collyn RiversThe Caravan & Motorhome Book covers every conceivable aspect of camper trailer, travel trailer and fifth wheel travel trailer, campervan and motorhome usage.

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Cover of Why Caravans Roll Over by Collyn RiversTravel trailers and their tow vehicles rarely jack-knife and roll over – but when they do the results are catastrophic. The cause, and how to prevent it, is explained here. Why Caravans Roll Over offers solid advice for keeping yourself safe on the road.
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Cover of Solar Success by Collyn RiversSolar Success explains how to design and build home and property systems that ensures affordable solar success first and every time.

 

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Between 1959 and 1961 Collyn Rivers and Antony Fleming drove a Bedford QLR off-road truck twice the length and breadth of Africa studying road surface conditions.

A 43 minute film about their adventure, produced and narrated by Antony Fleming, has been viewed on YouTube more than 1.6 million  times!

Picture from Africa journey. Caravan and Motorhome Electrics by Collyn Rivers

To view the film, and also read Collyn’s telling of the tale, just click the button below.

Africa 

Cover of How to Choose and Buy an RV by Collyn RiversWhether you’re buying your first RV or updating to a bigger, more comfortable rig, there are a great many things you need to know and consider.  This book breaks things down so that you can decide what you want and whether or not what you’ve found is right for you. It’s technically sound and comprehensive so that you can proceed with complete confidence.  How to Choose and Buy an RV is the ultimate guide for those times when you want to, well, choose and buy an RV.

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Cover of Why Caravans Roll Over by Collyn RiversTravel trailers and their tow vehicles rarely jack-knife and roll over – but when they do the results are catastrophic. The cause, and how to prevent it, is explained here.  Why Caravans Roll Over offers solid advice for keeping yourself safe on the road.

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Cover of Caravan and Motorhome Books by Collyn RiversCaravan & Motorhome Electrics is the totally rewritten successor to the original globally selling Motorhome Electrics. The book’s content now also covers every aspect of designing, installing and fault finding of the electrics in fifth wheel and conventional travel trailers, camper trailers and motorhomes.

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Cover of Solar Success by Collyn RiversSolar Success explains how to design and build home and property systems that ensures affordable solar success first and every time.

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Home Page - rv books, Collyn Rivers, rv books for beginners, solar books, best rv books, rv repair books, solar success, caravan and motorhome electrics, solar that really works, The caravan and motorhome book, why caravans roll over, how to choose and buy an rvThe Caravan & Motorhome Book covers every conceivable aspect of camper trailer, travel trailer and fifth wheel travel trailer, campervan and motorhome usage. Like all of Collyn Rivers’ books it is technically sound yet written in plain English.

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Cover of Solar That Really Works by Collyn RiversSolar That Really Works! explains, in clear English, every detail of designing and installing solar in boats, camper trailers, travel trailers and motorhomes. It is up-to-date, valid globally and technically accurate. It is clear, concise and easy to follow without sacrificing important detail.

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How to Choose and Buy an RV

This is Collyn Rivers’ newest book.  Building on his years of experience and extensive knowledge of engineering and all things travel trailer and RV, this is the book you need with you when shopping for an RV.

Caravan & Motorhome Electrics

Collyn Rivers has done it again! – if you need to know anything about motorhome electrics, then this book is for you… Collyn must be, without doubt, the foremost authority in Australia on this subject.

The Wanderer (Campervan & Motorhome Club of Australia Ltd)

Why Caravans Roll Over….and How to Prevent It​

Should be compulsory reading for everyone involved with Travel trailers: Design / Engineering, Marketing, Journalism (print & electronic), Regulations, Inspections, Driver-Training, Travel Trailer Clubs, Towing and Modifications.

Colin Young

Founder and CEO, Caravan Council of Australia

Solar that Really Works!

Collyn is an accomplished engineer who knows how to design and build successful systems. It is refreshing to see practical advice written in plain language when there is so little solar information around. . . this is an essential text . . . you won’t find a better guide.

Alan T. Gray

Earth Garden Magazine

The Caravan & Motorhome Book

Without doubt, this is the best book we have ever read . . . it will be treasured, and read on a regular basis.

The Wanderer (Campervan & Motorhome Club of Australia Ltd)