Administrators Eric Posted September 18 Administrators Share Posted September 18 Apparently, EVs usually have a 12-volt battery to run its accessories and f it is dead the vehicle won't work, even if the main battery pack is charged. So, an EV can be jump-started, if the 12-volt battery is flat. I'm wondering why there isn't an emergency charger for an EV's main battery, that gets hooked up to an ICE vehicle via jumper cables? The device would have an inverter built in to convert the 12 volts into whatever voltage it needs. Obviously, this wouldn't be a practical way to charge the EV, but it seems like it could give it enough charge in a reasonable amount of time to make it to a charging station, or at least get it off the road. Does a product like this already exist and I just missed it when I looked for it just now? Is there a technical reason why such an idea is impractical/impossible? My father once wrote an article for Hot Rod magazine about how to arc weld out in the field by hooking three car batteries together. I don't see why a running ICE vehicle couldn't provide enough power to give an EV a bit of a charge. 2 1 Link to comment Share on other sites More sharing options...
railfancwb Posted September 18 Share Posted September 18 5 minutes ago, Eric said: Apparently, EVs usually have a 12-volt battery to run its accessories and f it is dead the vehicle won't work, even if the main battery pack is charged. So, an EV can be jump-started, if the 12-volt battery is flat. I'm wondering why there isn't an emergency charger for an EV's main battery, that gets hooked up to an ICE vehicle via jumper cables? The device would have an inverter built in to convert the 12 volts into whatever voltage it needs. Obviously, this wouldn't be a practical way to charge the EV, but it seems like it could give it enough charge in a reasonable amount of time to make it to a charging station, or at least get it off the road. Does a product like this already exist and I just missed it when I looked for it just now? Is there a technical reason why such an idea is impractical/impossible? My father once wrote an article for Hot Rod magazine about how to arc weld out in the field by hooking three car batteries together. I don't see why a running ICE vehicle couldn't provide enough power to give an EV a bit of a charge. Contrary to the narrative. 3 1 Link to comment Share on other sites More sharing options...
jmohme Posted September 19 Share Posted September 19 Don't know about jump starting an EV, but as I witnessed first hand at the horse show I was workiing at last week, an Internal Combustion Engine powered golf cart can rescue an Electric Bike. 2 4 1 Link to comment Share on other sites More sharing options...
Batesmotel Posted September 19 Share Posted September 19 I have older neighbors who used to bike around the neighborhood for exercise every morning. Now they ride E-Bikes. Not the same. 4 2 Link to comment Share on other sites More sharing options...
Fog Posted September 19 Share Posted September 19 Most car alternators supply less than 700 watts of power, diesel pickups are only in the 1000 watt range. They would charge a Tesla at about a rate of two plus hours charge time per mile of range once you factor in conversion loss. A diesel pickup would be slightly better. Three miles to a charger would take basically all day to "jump" the battery. In many cases the car giving the jump would run out of gas before any meaningful charge was built up in the EV. That really is a statement on how horrid EV's are compared to ICE. 3 3 Link to comment Share on other sites More sharing options...
Huaco Kid Posted September 19 Share Posted September 19 You could just plug one of those handheld battery packs into the lighter plug in the ashtray. Right? 3 Link to comment Share on other sites More sharing options...
DAKA Posted September 19 Share Posted September 19 14 hours ago, Eric said: Apparently, EVs usually have a 12-volt battery to run its accessories and f it is dead the vehicle won't work, even if the main battery pack is charged. So, an EV can be jump-started, if the 12-volt battery is flat. I'm wondering why there isn't an emergency charger for an EV's main battery, that gets hooked up to an ICE vehicle via jumper cables? The device would have an inverter built in to convert the 12 volts into whatever voltage it needs. Obviously, this wouldn't be a practical way to charge the EV, but it seems like it could give it enough charge in a reasonable amount of time to make it to a charging station, or at least get it off the road. Does a product like this already exist and I just missed it when I looked for it just now? Is there a technical reason why such an idea is impractical/impossible? My father once wrote an article for Hot Rod magazine about how to arc weld out in the field by hooking three car batteries together. I don't see why a running ICE vehicle couldn't provide enough power to give an EV a bit of a charge. Those ICE's gotta' be good for something Maybe just to bring a generator to the EV ? 1 Link to comment Share on other sites More sharing options...
railfancwb Posted September 19 Share Posted September 19 1 hour ago, DAKA said: Those ICE's gotta' be good for something Maybe just to bring a generator to the EV ? According to one of the current DC Department Heads the IC vehicle is used to run ahead and block access to a charging station until the high muckety muck arrives in her EV 3 2 Link to comment Share on other sites More sharing options...
minderasr Posted September 19 Share Posted September 19 2 1 Link to comment Share on other sites More sharing options...
Fog Posted September 19 Share Posted September 19 5 hours ago, DAKA said: Those ICE's gotta' be good for something Maybe just to bring a generator to the EV ? Yep. A regular car is optimized for taking energy and turning it into movement through the drivetrain. Making electricity is a very small part of what it does. A generator on the other hand is optimized for turning fuel into electricity and even a small one puts out 2000 watts. A step up from there and you are in the 4500 range and can charge an EV using about twice the fuel a regular car would take for the same range. Now, an interesting question is a hybrid. Some of them are capable of putting out about 25,000 watts, that is a really fast charge. Still going to use more fuel, that is just the reality of conversion losses. I think a diesel electric hybrid truck might be a good idea for stop and go city driving. So far I don't think anybody is planning to make those? They could use regenerative braking, keep the battery topped off with a fairly small engine, and still have good power to merge into traffic. 2 2 Link to comment Share on other sites More sharing options...
DAKA Posted September 19 Share Posted September 19 34 minutes ago, Fog said: Yep. A regular car is optimized for taking energy and turning it into movement through the drivetrain. Making electricity is a very small part of what it does. A generator on the other hand is optimized for turning fuel into electricity and even a small one puts out 2000 watts. A step up from there and you are in the 4500 range and can charge an EV using about twice the fuel a regular car would take for the same range. Now, an interesting question is a hybrid. Some of them are capable of putting out about 25,000 watts, that is a really fast charge. Still going to use more fuel, that is just the reality of conversion losses. I think a diesel electric hybrid truck might be a good idea for stop and go city driving. So far I don't think anybody is planning to make those? They could use regenerative braking, keep the battery topped off with a fairly small engine, and still have good power to merge into traffic. You are trying to bring REASON into the mix....you know that ain't gonna work 5 Link to comment Share on other sites More sharing options...
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