HsHot because of low temperatures?

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Heavendenied
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Joined: 02/01/2015
Points: 70

Hi Together,
i drive my "new" white Vectrix VX1 Li+ since middle of 2016. Before, i had a silver VX1 Li+ for 1,5 years. The new vectrix had no problems for the last months, but after christmas it was standing still for 2 weeks. Last week i tried to charge it and there was the message "HSHot" when i turned ignition on. I thought that could not be true because we had about 0°C at that time and the Cell and amient temperatures showed between 0°C and 1°C. So i startetd charging and the next day i drove the Vectrix everything was ok.
Now i again didn't drive the Vectrix for about one week an in the morning when i turned it on there was again the HsHOt Error. Again the temperature in my garage was about 0°C and outside there was about -4°C. After i started to drive the HSHot warning did no longer show. After about 8kms the UpRst Warning showed up. I stopped, turned ignition off and startetd again and everything was ok...

Could these failures are caused by the low temperatures or do i really have a problem with my Vectrix?

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X Vectrix
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Joined: 08/04/2009
Points: 289
Re: HsHot because of low temperatures?

Its a known bug in the MC SW. The temperature value underflows and makes it look like a very high temp. I had the same issue the other day. I plan to fix it in my SW.

Heavendenied
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Joined: 02/01/2015
Points: 70
Re: HsHot because of low temperatures?

Ok, thank you.
Thats what i thought.
As it only appears on very low temperatures and i know its a bug i can just ignore it.
Hopefully it gets a little warmer the next days. Brrr...

framuga
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Joined: 10/23/2013
Points: 65
Re: HsHot because of low temperatures?

Actually this error is a bug of MC firmware, it is already corrected in the new version

R
R's picture
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Joined: 06/18/2009
Points: 1721
Re: HsHot because of low temperatures?

Actually this error is a bug of MC firmware, it is already corrected in the new version

Thank you for improving the vectrix.
I'm amazed by the huge improvements of the new set of firmwares. Hope Vectrix release them asap.

Heavendenied
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Joined: 02/01/2015
Points: 70
Re: HsHot because of low temperatures?

@framuga:
Where can i get this new firmware? At the Moment i get this message every morning...

framuga
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Joined: 10/23/2013
Points: 65
Re: HsHot because of low temperatures?

The new firmware is owned by Vectrixparts Poland.

Rolli
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Joined: 10/23/2015
Points: 33
Re: HsHot because of low temperatures?

I asked them for an update and get it through an online service remote upgrade and diagnostic. You have to buy that for I think 55Euro. I think it is worth to pay that.

marylandbob
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Joined: 06/22/2009
Points: 524
Re: HsHot because of low temperatures?

Charging COLD lithium batteries, (0C or below 32F) is NOT advisable!At cold temperatures, charging may result in internal plating out of lithium, resulting in later battery failure/malfunction. WARM such batteries before charging!--Most manufactures of lithium batteries advise charging in temperatures ABOVE 0c or 32F.

__________________

Robert M. Curry

Heavendenied
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Joined: 02/01/2015
Points: 70
Re: HsHot because of low temperatures?

If possible i don't charge them at low temperatures. I normaly charge after riding and normaly the temperatures are at about 5°C after riding.
But be honest: Do you really think it is wise to warm the batteries before charging? How should i do this? To warm the batteries from outside would take a long time and very much energy...

Bikemad
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Joined: 12/21/2013
Points: 188
Re: HsHot because of low temperatures?

Lithium Ion batteries should not be charged if their cells are below 0°C, and on some electric vehicles, the BMS will actively prevent it. To avoid this situation, it is often recommended (in cold temperatures) to charge the battery immediately after use while the cells are still warm.

With regard to temperatures below 0°C, the reduction in the charge capacity of the traction battery becomes significant and lowers the remaining range available to the vehicle.
During the winter months, it is recommended that the vehicle is parked in an enclosed space that protects from freezing.

In the event that the battery has been left for some time and cell temperatures have dropped below 0°C you may find the battery won't charge.
An operator can ensure that the cell(s) temperature will rise above zero degrees by driving the vehicle for at least a few hundred metres prior to placing the battery on charge.

I see no reason why the above advice should not apply equally to Leaf cells.

I always keep (and charge) my LiPo packs for my electric pushbikes indoors during the winter to avoid them being stored (or charged) with sub-zero cell temperatures.

I find that the bikes' performance in the cold is also noticeably better with a warm (room temperature) battery pack.

Fortunately, my Vectrix is never exposed to sub-zero temperatures, as it lives in an integral garage and I will not ride it if there is any chance of encountering ice on the roads.
I can cope with getting soaked in the rain, but I have no intention of falling off due to icy roads, which would probably result in unnecessary damage to both myself and the Vectrix.
However, riding a lightweight electric pushbike on ice and snow is something that should never be avoided.

Alan

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