The red car looks very much like one I rode in back in the 1970's when our neighbour who was a big wig at our localo electricity board brought one home which had been built to demonstrate electricity as a means of transport. He said it had a top speed of around 40mph and a range of about 40 miles, ideal for commuting, shopping etc. It also presumably didn't cost £thousands when the batteries needed to be replaced.
Sounds correct as mileage range was about that and 62 cars went to local electricity boards as mainly meter reading cars. Trouble was they cost over twice a new mini cost of period.
They appear to be connected in series though. With batteries of different states of health connected together it puts quite a bit of strain on the system unfortunately. I agree that converting to lithium would be great and not as expensive as one might think, at least in comparison to brand new lead acid batteries. Lithium ion costs about the same or up to about 50% higher, but have many advantages over lead acid. I converted my electric riding lawnmower to lithium a few years ago and it has been great. I can mow the lawn 3 or 4 times in between charges, unlike when it was using the original lead acid batteries which could (barely) do the yard once.
batteries are 6V blocks in series to make 12v and each corner is then used as a 12V block four lots of 12V for the slow two lots of 12V front and rear are then put in parallel and then puts front and rear in parallel to give 24V and finally all four 12V blocks are put in series - have a look at the control system video on my Enfield8000 site. The big contactors control the linking of the system. My understanding is that lithium do not like being altered and changed from being in series to parallel all the time. Plus the recent prices were about 5 times higher to replace for the red car mentioned in this video.
@@alviseven1250Usually there is a limitation on how many you can put in series, but no limitations (generally) in how many you put in parallel. It depends on the battery of course, but 4 in series is not unusual. When I upgraded my riding lawnmower the lead acid 4 pack was going to cost me about $800. I got the lithium equivalent for a bit over double that (~$1700) but cheaper ones can be found (they had mediocre reviews so I spent the extra). The benefits are almost always worth the extra money though. The nice thing about lithium batteries is that their discharge curve is such that you have most of the power for the whole cycle and then it drops off sharply near the end, whereas lead acid batteries drop kind of linearly. Lithium doesn't mind going down to 5%* whereas lead acid can be damaged if you go much below 50%. Anyway, it's something to consider for the future. * For longevity I charge when it hits around 25%.
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I'd love to find an Enfield for pottering around locally in SE London.
Well done on saving the two you have.
Well done Q
The red car looks very much like one I rode in back in the 1970's when our neighbour who was a big wig at our localo electricity board brought one home which had been built to demonstrate electricity as a means of transport. He said it had a top speed of around 40mph and a range of about 40 miles, ideal for commuting, shopping etc. It also presumably didn't cost £thousands when the batteries needed to be replaced.
Sounds correct as mileage range was about that and 62 cars went to local electricity boards as mainly meter reading cars. Trouble was they cost over twice a new mini cost of period.
Lovely little thing :-) It's really running on a 12v system? Must draw lots and lots of amps at that voltage! Would you consider swapping to LiFePo4?
runs off 12-24-48V with the voltage blocks being put into series and parallel to get these voltages and 48v is the fastest
They appear to be connected in series though. With batteries of different states of health connected together it puts quite a bit of strain on the system unfortunately. I agree that converting to lithium would be great and not as expensive as one might think, at least in comparison to brand new lead acid batteries. Lithium ion costs about the same or up to about 50% higher, but have many advantages over lead acid. I converted my electric riding lawnmower to lithium a few years ago and it has been great. I can mow the lawn 3 or 4 times in between charges, unlike when it was using the original lead acid batteries which could (barely) do the yard once.
batteries are 6V blocks in series to make 12v and each corner is then used as a 12V block four lots of 12V for the slow two lots of 12V front and rear are then put in parallel and then puts front and rear in parallel to give 24V and finally all four 12V blocks are put in series - have a look at the control system video on my Enfield8000 site. The big contactors control the linking of the system. My understanding is that lithium do not like being altered and changed from being in series to parallel all the time. Plus the recent prices were about 5 times higher to replace for the red car mentioned in this video.
@@alviseven1250Usually there is a limitation on how many you can put in series, but no limitations (generally) in how many you put in parallel. It depends on the battery of course, but 4 in series is not unusual. When I upgraded my riding lawnmower the lead acid 4 pack was going to cost me about $800. I got the lithium equivalent for a bit over double that (~$1700) but cheaper ones can be found (they had mediocre reviews so I spent the extra). The benefits are almost always worth the extra money though. The nice thing about lithium batteries is that their discharge curve is such that you have most of the power for the whole cycle and then it drops off sharply near the end, whereas lead acid batteries drop kind of linearly. Lithium doesn't mind going down to 5%* whereas lead acid can be damaged if you go much below 50%. Anyway, it's something to consider for the future.
* For longevity I charge when it hits around 25%.