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Lithium Titanium (LTO) Batteries and BMS


TheBiscuits

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Just spotted this in the Bimble newsletter and thought it might interest some on here.

 

https://www.bimblesolar.com/mega-long-life-lto-lithium-batteries

 

12V, 24V And 48V Modular LTO Battery - Pre-Order - Due In June

We have created a battery that is designed to last a lifetime!  Not only have we used the longest lasting battery nano-technology with 30,000 cycles we’ve also kept all the electronics in a separate unit so they can be easily replaced or upgraded in the future.

 

Separate BMS (Battery Management System)

• Choice between 100A and 250A BMS units.

• Select 12V, 24V or 48V BMS to suit your application

• Includes CAN Bus and Bluetooth communications to link to your inverter or smartphone.

• Future Proof – as new communications technologies evolve you can simply replace the BMS to have the latest tech for your battery.

• Reduces cost with 1 single BMS rather than a BMS per unit.

• If electronics fail the BMS can easily and cheaply be replaced whilst keeping the same battery bank.

• Allows for custom BMS for special applications.

• BMS has 5 Year Warranty

• Battery Management System looks after your battery with low battery disconnect, cell balancing, accurate state of charge and temperature monitoring.

 

Modular Battery System

• Can make 12V, 24V or 48V banks.

• You can expand your bank easily in the future by adding more of the same modules.

• If you decide to change your system voltage you can simply replace the BMS and reconfigure the batteries.

• 30Ah blocks – we’ve designed in 30Ah blocks to allow banks from 30Ah to 300Ah.

• Battery has 10 Year Warranty

• 30,000 100% DOD cycles - that’s over 80 years of daily cycles!  After 30,000 cycles, battery still holds 80% of it's original capacity!

• Made with rectangular cells to avoid wasted space inside the battery units.

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4 minutes ago, TheBiscuits said:

 

Just spotted this in the Bimble newsletter and thought it might interest some on here.

 

https://www.bimblesolar.com/mega-long-life-lto-lithium-batteries

 

12V, 24V And 48V Modular LTO Battery - Pre-Order - Due In June

We have created a battery that is designed to last a lifetime!  Not only have we used the longest lasting battery nano-technology with 30,000 cycles we’ve also kept all the electronics in a separate unit so they can be easily replaced or upgraded in the future.

 

Separate BMS (Battery Management System)

• Choice between 100A and 250A BMS units.

• Select 12V, 24V or 48V BMS to suit your application

• Includes CAN Bus and Bluetooth communications to link to your inverter or smartphone.

• Future Proof – as new communications technologies evolve you can simply replace the BMS to have the latest tech for your battery.

• Reduces cost with 1 single BMS rather than a BMS per unit.

• If electronics fail the BMS can easily and cheaply be replaced whilst keeping the same battery bank.

• Allows for custom BMS for special applications.

• BMS has 5 Year Warranty

• Battery Management System looks after your battery with low battery disconnect, cell balancing, accurate state of charge and temperature monitoring.

 

Modular Battery System

• Can make 12V, 24V or 48V banks.

• You can expand your bank easily in the future by adding more of the same modules.

• If you decide to change your system voltage you can simply replace the BMS and reconfigure the batteries.

• 30Ah blocks – we’ve designed in 30Ah blocks to allow banks from 30Ah to 300Ah.

• Battery has 10 Year Warranty

• 30,000 100% DOD cycles - that’s over 80 years of daily cycles!  After 30,000 cycles, battery still holds 80% of it's original capacity!

• Made with rectangular cells to avoid wasted space inside the battery units.

"30,000 100% DOD-that's over 80 years of daily cycles! After 30,000 cycles, battery still hold 80% of it's original capacity!"..............Oh, and we're offering a 10 year warranty.?????????????

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1 minute ago, Slim said:

"30,000 100% DOD-that's over 80 years of daily cycles! After 30,000 cycles, battery still hold 80% of it's original capacity!"..............Oh, and we're offering a 10 year warranty.?????????????

 

Heh.  Maybe they expect you to fully cycle the batteries 8 times a day! :D

 

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5 minutes ago, nicknorman said:

Hmmmm, £10k for 240Ah is a little pricey!

 

But its a good investment, they'll still be going strong when you are 120 (and the canals are paved over as cycleways).

 

...................Dave

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5 minutes ago, nicknorman said:

Hmmmm, £10k for 240Ah is a little pricey!

 

Yeah, not cheap (although that is a 13kWh pack @ 48V ) but if they really can do 30,000 cycles at 100% DoD they might be interesting.  -40 to +60 degrees C operating and charging range as well.

 

It's the 16.2V charge voltage for a nominal 12V (13.8V mean working) that intrigues me.

 

And the sub-£100 BMS, obviously ...

 

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1 minute ago, TheBiscuits said:

 

Yeah, not cheap (although that is a 13kWh pack @ 48V ) but if they really can do 30,000 cycles at 100% DoD they might be interesting.  -40 to +60 degrees C operating and charging range as well.

 

It's the 16.2V charge voltage for a nominal 12V (13.8V mean working) that intrigues me.

 

And the sub-£100 BMS, obviously ...

 

Oh yes, I hadnt noticed it was 48v.

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Everyone complains about the cost of LiFePO4, these are double again. The massive cycle life isn't useful for a boat, LiFePO4 already last longer than needed. Subzero operation would be useful in the Arctic, less so on the UK canals.

 

Great technology, but not for narrowboats...

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30 minutes ago, Tony Brooks said:

Anyone know about cell balancing on these batteries - is it necessary and if so how's it done with a remote BMS.


Good question. It is just a variation on other Li technologies, the difference being the anode material has a much higher surface area per gram, thus faster ion mobility. So surely it must require cell level balancing.

 

That said, I think sometimes the issue of balancing is overplayed. Once cells are balanced they don’t really become imbalanced easily. The cells are much less “moody” than lead acid, much more precise in their capacity, nearly 100% charge efficiency etc

 

One issue is the lack of clarity on what a BMS actually is. Battery Management vs Battery Monitoring. Perhaps it is like Valence batteries, there is a small internal BMS that deals with balancing - no need for any significant power capability, balancing can be done with a very small current over a long time. And then externally, the high power electronics that are used for over voltage and undervoltage protection. These need to be able to pass and switch 100s of amps.

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I reckon some potential here for diesel electric hybrid canal boats. 

 

Lots of daily cycles. Charge discharge charge discharge etc. Use the electric for slow speed maneouvering with a pod motor in the rudder then use the diesel engine for main propulsion and fast charging the batteries. 

 

 

You could even link it all up so the diesel starts up on demand and the electric runs when diesel not needed. 

 

Could be a really nice system in theory. 

 

Plus of course a 10C charge rate option would mean you could charge the battery from the socket mounted beside the water point while filling the tank. 

 

And fines for hogging water points !

 

 

 

 

 

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21 hours ago, Slim said:

"30,000 100% DOD-that's over 80 years of daily cycles! After 30,000 cycles, battery still hold 80% of it's original capacity!"..............Oh, and we're offering a 10 year warranty.?????????????

And Green Shield stamps ?

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I've been looking at LTO for a couple of years. They do have some serious positives for some applications - particularly rapid charging and safety. Their lifespan is pretty impressive too - and means that the cost per cycle is much lower than for many other technologies.

 

The main issues as I see it are the lower energy density than competing tech and the massive upfront cost. 

 

Hire fleets might be interested in this chemistry if they can put in enough juice to run a boat for a whole week in a matter of hours but they're going to need some very fat cables to their chargers and depending on the size of their fleet they might need a lot of chargers...

 

And I guess a fuel boat of the future might use something like this.

 

On 09/03/2021 at 21:56, TheBiscuits said:

 

Heh.  Maybe they expect you to fully cycle the batteries 8 times a day! :D

 

Apparently they're commonly used in buses. Charge for 6 minutes, run for an hour, repeat throughout the day. 

 

On 10/03/2021 at 18:15, ditchcrawler said:

What kind of battery?

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