On 9/9/2021 11:58 AM, bitrex wrote:> On 9/9/2021 10:12 AM, Ed Lee wrote: >> On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: >>> On 9/9/2021 9:48 AM, bitrex wrote: >>>> On 9/9/2021 9:42 AM, Ed Lee wrote: >>>>> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk >>>>> wrote: >>>>>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev >>>>>> bill....@ieee.org: >>>>>>> Electric vehicle batteries are about 85% efficient, but the 15% of >>>>>>> the energy that you put in that you don't get out has to appear as >>>>>>> heat, generated in the battery. >>>>>>> >>>>>>> The worst case would presumably be during fast charging. >>>>>>> >>>>>>> One has to wonder whether anybody has built a battery with heat-pipe >>>>>>> down the middle, sticking into heat-sink extrusions projecting from >>>>>>> either end. >>>>>>> >>>>>>> Nobody seems to do it, so it clearly isn't strictly necessary, but >>>>>>> roughly halving the peak temperature inside the battery should make >>>>>>> them last longer. >>>>>>> >>>>>> Tesla batteries are liquid cooled (or heated when needed), there's a >>>>>> glykol filled flat tube that zig-zag between the cells >>>>> >>>>> Same for the Bolt, there are heat transfer plates between cells, with >>>>> small pipes zz over the flat plate. >>>>> >>>> >>>> The Volt and Spark EV used that design, but I believe the Bolt is more >>>> similar to BMW there's a coolant plate under the cells, not in-between. >>> The other advantage of cooled bottom-plate is that it can be >>> load-bearing and pull double-duty as the battery tray and provide >>> rigidity to the frame. >> >> OK, but heat travel up, more than down, at least for the air flow. I >> am considering removing the top plate of my Leaf battery to cool it. >> The bottom plate is heavy and rigid enough. However, it will no >> longer be an air-tight submarine, and my next dive would total the >> battery. >> >> I did drive the Leaf into a flooded ditch, up to the floor of the car. >> > > The "safing" method for the Mitsubishi iMieV's battery if the pack is > say damaged in an accident or something is you disconnect, pull a few > ports open, and pick the whole car up with a forklift and place it in > three-foot deep pool of water for 24 hours. > > Not kidding, it's in the service manual lolDon't quote on that depth, it might have been more like 18" of water, three feet a lotta water
Cooling an electric vehicle battery.
Started by ●September 9, 2021
Reply by ●September 9, 20212021-09-09
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 9:02:31 AM UTC-7, bitrex wrote:> On 9/9/2021 11:58 AM, bitrex wrote: > > On 9/9/2021 10:12 AM, Ed Lee wrote: > >> On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: > >>> On 9/9/2021 9:48 AM, bitrex wrote: > >>>> On 9/9/2021 9:42 AM, Ed Lee wrote: > >>>>> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk > >>>>> wrote: > >>>>>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev > >>>>>> bill....@ieee.org: > >>>>>>> Electric vehicle batteries are about 85% efficient, but the 15% of > >>>>>>> the energy that you put in that you don't get out has to appear as > >>>>>>> heat, generated in the battery. > >>>>>>> > >>>>>>> The worst case would presumably be during fast charging. > >>>>>>> > >>>>>>> One has to wonder whether anybody has built a battery with heat-pipe > >>>>>>> down the middle, sticking into heat-sink extrusions projecting from > >>>>>>> either end. > >>>>>>> > >>>>>>> Nobody seems to do it, so it clearly isn't strictly necessary, but > >>>>>>> roughly halving the peak temperature inside the battery should make > >>>>>>> them last longer. > >>>>>>> > >>>>>> Tesla batteries are liquid cooled (or heated when needed), there's a > >>>>>> glykol filled flat tube that zig-zag between the cells > >>>>> > >>>>> Same for the Bolt, there are heat transfer plates between cells, with > >>>>> small pipes zz over the flat plate. > >>>>> > >>>> > >>>> The Volt and Spark EV used that design, but I believe the Bolt is more > >>>> similar to BMW there's a coolant plate under the cells, not in-between. > >>> The other advantage of cooled bottom-plate is that it can be > >>> load-bearing and pull double-duty as the battery tray and provide > >>> rigidity to the frame. > >> > >> OK, but heat travel up, more than down, at least for the air flow. I > >> am considering removing the top plate of my Leaf battery to cool it. > >> The bottom plate is heavy and rigid enough. However, it will no > >> longer be an air-tight submarine, and my next dive would total the > >> battery. > >> > >> I did drive the Leaf into a flooded ditch, up to the floor of the car. > >> > > > > The "safing" method for the Mitsubishi iMieV's battery if the pack is > > say damaged in an accident or something is you disconnect, pull a few > > ports open, and pick the whole car up with a forklift and place it in > > three-foot deep pool of water for 24 hours. > > > > Not kidding, it's in the service manual lol > Don't quote on that depth, it might have been more like 18" of water, > three feet a lotta waterMy Leaf was floating in about 15" of water, but it won't sink any further. The carpet was wet, but no volume of water. It was in the water for couple of hours until someone pull it out with a pickup. I think it would be safe as long as the bottom case is water-tight with the car frame. The battery can then be cooled with the passenger compartment A/C.
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 9:18:12 AM UTC-7, Ed Lee wrote:> On Thursday, September 9, 2021 at 9:02:31 AM UTC-7, bitrex wrote: > > On 9/9/2021 11:58 AM, bitrex wrote: > > > On 9/9/2021 10:12 AM, Ed Lee wrote: > > >> On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: > > >>> On 9/9/2021 9:48 AM, bitrex wrote: > > >>>> On 9/9/2021 9:42 AM, Ed Lee wrote: > > >>>>> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk > > >>>>> wrote: > > >>>>>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev > > >>>>>> bill....@ieee.org: > > >>>>>>> Electric vehicle batteries are about 85% efficient, but the 15% of > > >>>>>>> the energy that you put in that you don't get out has to appear as > > >>>>>>> heat, generated in the battery. > > >>>>>>> > > >>>>>>> The worst case would presumably be during fast charging. > > >>>>>>> > > >>>>>>> One has to wonder whether anybody has built a battery with heat-pipe > > >>>>>>> down the middle, sticking into heat-sink extrusions projecting from > > >>>>>>> either end. > > >>>>>>> > > >>>>>>> Nobody seems to do it, so it clearly isn't strictly necessary, but > > >>>>>>> roughly halving the peak temperature inside the battery should make > > >>>>>>> them last longer. > > >>>>>>> > > >>>>>> Tesla batteries are liquid cooled (or heated when needed), there's a > > >>>>>> glykol filled flat tube that zig-zag between the cells > > >>>>> > > >>>>> Same for the Bolt, there are heat transfer plates between cells, with > > >>>>> small pipes zz over the flat plate. > > >>>>> > > >>>> > > >>>> The Volt and Spark EV used that design, but I believe the Bolt is more > > >>>> similar to BMW there's a coolant plate under the cells, not in-between. > > >>> The other advantage of cooled bottom-plate is that it can be > > >>> load-bearing and pull double-duty as the battery tray and provide > > >>> rigidity to the frame. > > >> > > >> OK, but heat travel up, more than down, at least for the air flow. I > > >> am considering removing the top plate of my Leaf battery to cool it. > > >> The bottom plate is heavy and rigid enough. However, it will no > > >> longer be an air-tight submarine, and my next dive would total the > > >> battery. > > >> > > >> I did drive the Leaf into a flooded ditch, up to the floor of the car. > > >> > > > > > > The "safing" method for the Mitsubishi iMieV's battery if the pack is > > > say damaged in an accident or something is you disconnect, pull a few > > > ports open, and pick the whole car up with a forklift and place it in > > > three-foot deep pool of water for 24 hours. > > > > > > Not kidding, it's in the service manual lol > > Don't quote on that depth, it might have been more like 18" of water, > > three feet a lotta water > My Leaf was floating in about 15" of water, but it won't sink any further. The carpet was wet, but no volume of water. It was in the water for couple of hours until someone pull it out with a pickup. > > I think it would be safe as long as the bottom case is water-tight with the car frame. The battery can then be cooled with the passenger compartment A/C.Recently, from Fresno to Bakersfield, after 5 consecutive Free Fast Charging, the battery reaches 120F. I ended up with long breaks just to cool it down. The HV shutdown port (only access to the battery) did not feel warm at all. The battery is too well insulated.
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 4:08:09 AM UTC-4, bill....@ieee.org wrote:> Electric vehicle batteries are about 85% efficient, but the 15% of the energy that you put in that you don't get out has to appear as heat, generated in the battery. > > The worst case would presumably be during fast charging.I can't say how much of the claimed 15% energy loss is dissipated during charging vs. discharging, but assuming they are even approximately even, the discharge has much higher heat generating potential because the highest power is during discharge. My car can generate 400 kW easily when I mash the pedal. Even though this energy is seldom continuous, it releases significant amounts of heat into the motor and battery. I normally drive relatively flat terrain, but in mountainous areas I expect such high numbers would be much more protracted. When towing it would be even worse. While most ICE vehicles are designed to dissipate such heat, EVs are typically not designed to dissipate such heat on a continuing basis.> One has to wonder whether anybody has built a battery with heat-pipe down the middle, sticking into heat-sink extrusions projecting from either end.??? Not sure why that design comes to mind. The Tesla batteries have coolant flowing through them. This eliminates the delta T required to push the coolant through the heat pipe and heat sink. The heat transfer is powered by a pump as on nearly every type of vehicle. I don't know a lot about many of the various EVs being designed today, but the Nissan Leaf does much less to control the temperature of the battery with the resultant shortening of the battery life.> Nobody seems to do it, so it clearly isn't strictly necessary, but roughly halving the peak temperature inside the battery should make them last longer.Nobody does what exactly? It is hard to imagine an EV maker who isn't aware of the need to control the battery temperature. Nissan aside I expect going forward they all provide battery cooling. Are you suggesting your heat pipe idea is a better way to accomplish this? -- Rick C. - Get 1,000 miles of free Supercharging - Tesla referral code - https://ts.la/richard11209
Reply by ●September 9, 20212021-09-09
Ed Lee <edward.ming.lee@gmail.com> wrote:> On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: >> On 9/9/2021 9:48 AM, bitrex wrote: >> > On 9/9/2021 9:42 AM, Ed Lee wrote: >> >> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk >> >> wrote: >> >>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev >> >>> bill....@ieee.org: >> >>>> Electric vehicle batteries are about 85% efficient, but the 15% of >> >>>> the energy that you put in that you don't get out has to appear as >> >>>> heat, generated in the battery. >> >>>> >> >>>> The worst case would presumably be during fast charging. >> >>>> >> >>>> One has to wonder whether anybody has built a battery with heat-pipe >> >>>> down the middle, sticking into heat-sink extrusions projecting from >> >>>> either end. >> >>>> >> >>>> Nobody seems to do it, so it clearly isn't strictly necessary, but >> >>>> roughly halving the peak temperature inside the battery should make >> >>>> them last longer. >> >>>> >> >>> Tesla batteries are liquid cooled (or heated when needed), there's a >> >>> glykol filled flat tube that zig-zag between the cells >> >> >> >> Same for the Bolt, there are heat transfer plates between cells, with >> >> small pipes zz over the flat plate. >> >> >> > >> > The Volt and Spark EV used that design, but I believe the Bolt is more >> > similar to BMW there's a coolant plate under the cells, not in-between. >> The other advantage of cooled bottom-plate is that it can be >> load-bearing and pull double-duty as the battery tray and provide >> rigidity to the frame. > > OK, but heat travel up, more than down, at least for the air flow. I am > considering removing the top plate of my Leaf battery to cool it. The > bottom plate is heavy and rigid enough. However, it will no longer be > an air-tight submarine, and my next dive would total the battery.Batteries are not made of air currents,and conduction is usually able to transfer more heat than convection anyways.> I did drive the Leaf into a flooded ditch, up to the floor of the car.Sounds clever.
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 11:52:12 AM UTC-7, Cydrome Leader wrote:> Ed Lee <edward....@gmail.com> wrote: > > On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: > >> On 9/9/2021 9:48 AM, bitrex wrote: > >> > On 9/9/2021 9:42 AM, Ed Lee wrote: > >> >> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk > >> >> wrote: > >> >>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev > >> >>> bill....@ieee.org: > >> >>>> Electric vehicle batteries are about 85% efficient, but the 15% of > >> >>>> the energy that you put in that you don't get out has to appear as > >> >>>> heat, generated in the battery. > >> >>>> > >> >>>> The worst case would presumably be during fast charging. > >> >>>> > >> >>>> One has to wonder whether anybody has built a battery with heat-pipe > >> >>>> down the middle, sticking into heat-sink extrusions projecting from > >> >>>> either end. > >> >>>> > >> >>>> Nobody seems to do it, so it clearly isn't strictly necessary, but > >> >>>> roughly halving the peak temperature inside the battery should make > >> >>>> them last longer. > >> >>>> > >> >>> Tesla batteries are liquid cooled (or heated when needed), there's a > >> >>> glykol filled flat tube that zig-zag between the cells > >> >> > >> >> Same for the Bolt, there are heat transfer plates between cells, with > >> >> small pipes zz over the flat plate. > >> >> > >> > > >> > The Volt and Spark EV used that design, but I believe the Bolt is more > >> > similar to BMW there's a coolant plate under the cells, not in-between. > >> The other advantage of cooled bottom-plate is that it can be > >> load-bearing and pull double-duty as the battery tray and provide > >> rigidity to the frame. > > > > OK, but heat travel up, more than down, at least for the air flow. I am > > considering removing the top plate of my Leaf battery to cool it. The > > bottom plate is heavy and rigid enough. However, it will no longer be > > an air-tight submarine, and my next dive would total the battery. > Batteries are not made of air currents,and conduction is usually able to > transfer more heat than convection anyways.For older model Leaf, there are spacer bars between cells with a cooling air gap. So, forced air from the bottom should help.> > I did drive the Leaf into a flooded ditch, up to the floor of the car. > Sounds clever.Yes, embarrassingly clever to cool down. The area looks flat off the road, from a distance.
Reply by ●September 9, 20212021-09-09
Ed Lee <edward.ming.lee@gmail.com> wrote:> On Thursday, September 9, 2021 at 11:52:12 AM UTC-7, Cydrome Leader wrote: >> Ed Lee <edward....@gmail.com> wrote: >> > On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: >> >> On 9/9/2021 9:48 AM, bitrex wrote: >> >> > On 9/9/2021 9:42 AM, Ed Lee wrote: >> >> >> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk >> >> >> wrote: >> >> >>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev >> >> >>> bill....@ieee.org: >> >> >>>> Electric vehicle batteries are about 85% efficient, but the 15% of >> >> >>>> the energy that you put in that you don't get out has to appear as >> >> >>>> heat, generated in the battery. >> >> >>>> >> >> >>>> The worst case would presumably be during fast charging. >> >> >>>> >> >> >>>> One has to wonder whether anybody has built a battery with heat-pipe >> >> >>>> down the middle, sticking into heat-sink extrusions projecting from >> >> >>>> either end. >> >> >>>> >> >> >>>> Nobody seems to do it, so it clearly isn't strictly necessary, but >> >> >>>> roughly halving the peak temperature inside the battery should make >> >> >>>> them last longer. >> >> >>>> >> >> >>> Tesla batteries are liquid cooled (or heated when needed), there's a >> >> >>> glykol filled flat tube that zig-zag between the cells >> >> >> >> >> >> Same for the Bolt, there are heat transfer plates between cells, with >> >> >> small pipes zz over the flat plate. >> >> >> >> >> > >> >> > The Volt and Spark EV used that design, but I believe the Bolt is more >> >> > similar to BMW there's a coolant plate under the cells, not in-between. >> >> The other advantage of cooled bottom-plate is that it can be >> >> load-bearing and pull double-duty as the battery tray and provide >> >> rigidity to the frame. >> > >> > OK, but heat travel up, more than down, at least for the air flow. I am >> > considering removing the top plate of my Leaf battery to cool it. The >> > bottom plate is heavy and rigid enough. However, it will no longer be >> > an air-tight submarine, and my next dive would total the battery. >> Batteries are not made of air currents,and conduction is usually able to >> transfer more heat than convection anyways. > > For older model Leaf, there are spacer bars between cells with a cooling air gap. So, forced air from the bottom should help.Is the spacing for cooling or expansion or explosion/fire mitigation? I haven't torn one apart to see myself. Are there blowers to move air through these channels?>> > I did drive the Leaf into a flooded ditch, up to the floor of the car. >> Sounds clever. > > Yes, embarrassingly clever to cool down. The area looks flat off the road, from a distance.Did you drive into a lake?
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 2:58:51 PM UTC-7, Cydrome Leader wrote:> Ed Lee <edward....@gmail.com> wrote: > > On Thursday, September 9, 2021 at 11:52:12 AM UTC-7, Cydrome Leader wrote: > >> Ed Lee <edward....@gmail.com> wrote: > >> > On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: > >> >> On 9/9/2021 9:48 AM, bitrex wrote: > >> >> > On 9/9/2021 9:42 AM, Ed Lee wrote: > >> >> >> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk > >> >> >> wrote: > >> >> >>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev > >> >> >>> bill....@ieee.org: > >> >> >>>> Electric vehicle batteries are about 85% efficient, but the 15% of > >> >> >>>> the energy that you put in that you don't get out has to appear as > >> >> >>>> heat, generated in the battery. > >> >> >>>> > >> >> >>>> The worst case would presumably be during fast charging. > >> >> >>>> > >> >> >>>> One has to wonder whether anybody has built a battery with heat-pipe > >> >> >>>> down the middle, sticking into heat-sink extrusions projecting from > >> >> >>>> either end. > >> >> >>>> > >> >> >>>> Nobody seems to do it, so it clearly isn't strictly necessary, but > >> >> >>>> roughly halving the peak temperature inside the battery should make > >> >> >>>> them last longer. > >> >> >>>> > >> >> >>> Tesla batteries are liquid cooled (or heated when needed), there's a > >> >> >>> glykol filled flat tube that zig-zag between the cells > >> >> >> > >> >> >> Same for the Bolt, there are heat transfer plates between cells, with > >> >> >> small pipes zz over the flat plate. > >> >> >> > >> >> > > >> >> > The Volt and Spark EV used that design, but I believe the Bolt is more > >> >> > similar to BMW there's a coolant plate under the cells, not in-between. > >> >> The other advantage of cooled bottom-plate is that it can be > >> >> load-bearing and pull double-duty as the battery tray and provide > >> >> rigidity to the frame. > >> > > >> > OK, but heat travel up, more than down, at least for the air flow. I am > >> > considering removing the top plate of my Leaf battery to cool it. The > >> > bottom plate is heavy and rigid enough. However, it will no longer be > >> > an air-tight submarine, and my next dive would total the battery. > >> Batteries are not made of air currents,and conduction is usually able to > >> transfer more heat than convection anyways. > > > > For older model Leaf, there are spacer bars between cells with a cooling air gap. So, forced air from the bottom should help. > Is the spacing for cooling or expansion or explosion/fire mitigation? IYes, it's allowance for expansion.> haven't torn one apart to see myself. Are there blowers to move air > through these channels?Not currently, but i plan on adding blower pipe from the HV cutoff port (in the middle of the passenger compartment). Someone actually build a 3D model for an adapter for it. But it won't work too well without exhaust holes.> >> > I did drive the Leaf into a flooded ditch, up to the floor of the car. > >> Sounds clever. > > > > Yes, embarrassingly clever to cool down. The area looks flat off the road, from a distance. > Did you drive into a lake?It was just an open area off the road. It looked like flat area for a quick stop, at least for the surface.
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 3:15:16 PM UTC-7, Ed Lee wrote:> On Thursday, September 9, 2021 at 2:58:51 PM UTC-7, Cydrome Leader wrote: > > Ed Lee <edward....@gmail.com> wrote: > > > On Thursday, September 9, 2021 at 11:52:12 AM UTC-7, Cydrome Leader wrote: > > >> Ed Lee <edward....@gmail.com> wrote: > > >> > On Thursday, September 9, 2021 at 6:54:04 AM UTC-7, bitrex wrote: > > >> >> On 9/9/2021 9:48 AM, bitrex wrote: > > >> >> > On 9/9/2021 9:42 AM, Ed Lee wrote: > > >> >> >> On Thursday, September 9, 2021 at 1:29:02 AM UTC-7, lang...@fonz.dk > > >> >> >> wrote: > > >> >> >>> torsdag den 9. september 2021 kl. 10.08.09 UTC+2 skrev > > >> >> >>> bill....@ieee.org: > > >> >> >>>> Electric vehicle batteries are about 85% efficient, but the 15% of > > >> >> >>>> the energy that you put in that you don't get out has to appear as > > >> >> >>>> heat, generated in the battery. > > >> >> >>>> > > >> >> >>>> The worst case would presumably be during fast charging. > > >> >> >>>> > > >> >> >>>> One has to wonder whether anybody has built a battery with heat-pipe > > >> >> >>>> down the middle, sticking into heat-sink extrusions projecting from > > >> >> >>>> either end. > > >> >> >>>> > > >> >> >>>> Nobody seems to do it, so it clearly isn't strictly necessary, but > > >> >> >>>> roughly halving the peak temperature inside the battery should make > > >> >> >>>> them last longer. > > >> >> >>>> > > >> >> >>> Tesla batteries are liquid cooled (or heated when needed), there's a > > >> >> >>> glykol filled flat tube that zig-zag between the cells > > >> >> >> > > >> >> >> Same for the Bolt, there are heat transfer plates between cells, with > > >> >> >> small pipes zz over the flat plate. > > >> >> >> > > >> >> > > > >> >> > The Volt and Spark EV used that design, but I believe the Bolt is more > > >> >> > similar to BMW there's a coolant plate under the cells, not in-between. > > >> >> The other advantage of cooled bottom-plate is that it can be > > >> >> load-bearing and pull double-duty as the battery tray and provide > > >> >> rigidity to the frame. > > >> > > > >> > OK, but heat travel up, more than down, at least for the air flow. I am > > >> > considering removing the top plate of my Leaf battery to cool it. The > > >> > bottom plate is heavy and rigid enough. However, it will no longer be > > >> > an air-tight submarine, and my next dive would total the battery. > > >> Batteries are not made of air currents,and conduction is usually able to > > >> transfer more heat than convection anyways. > > > > > > For older model Leaf, there are spacer bars between cells with a cooling air gap. So, forced air from the bottom should help. > > Is the spacing for cooling or expansion or explosion/fire mitigation? I > Yes, it's allowance for expansion. > > haven't torn one apart to see myself. Are there blowers to move air > > through these channels? > Not currently, but i plan on adding blower pipe from the HV cutoff port (in the middle of the passenger compartment). Someone actually build a 3D model for an adapter for it. But it won't work too well without exhaust holes.Here is the link: https://www.myminifactory.com/object/3d-print-leaf-battery-cooling-160671> > >> > I did drive the Leaf into a flooded ditch, up to the floor of the car. > > >> Sounds clever. > > > > > > Yes, embarrassingly clever to cool down. The area looks flat off the road, from a distance. > > Did you drive into a lake? > It was just an open area off the road. It looked like flat area for a quick stop, at least for the surface.
Reply by ●September 9, 20212021-09-09
On Thursday, September 9, 2021 at 6:19:52 PM UTC-4, Ed Lee wrote:> On Thursday, September 9, 2021 at 3:15:16 PM UTC-7, Ed Lee wrote: > > On Thursday, September 9, 2021 at 2:58:51 PM UTC-7, Cydrome Leader wrote: > > > Ed Lee <edward....@gmail.com> wrote: > > > > > > > > For older model Leaf, there are spacer bars between cells with a cooling air gap. So, forced air from the bottom should help. > > > Is the spacing for cooling or expansion or explosion/fire mitigation? I > > Yes, it's allowance for expansion. > > > haven't torn one apart to see myself. Are there blowers to move air > > > through these channels? > > Not currently, but i plan on adding blower pipe from the HV cutoff port (in the middle of the passenger compartment). Someone actually build a 3D model for an adapter for it. But it won't work too well without exhaust holes. > Here is the link: > https://www.myminifactory.com/object/3d-print-leaf-battery-cooling-160671 > > > >> > I did drive the Leaf into a flooded ditch, up to the floor of the car. > > > >> Sounds clever. > > > > > > > > Yes, embarrassingly clever to cool down. The area looks flat off the road, from a distance. > > > Did you drive into a lake? > > It was just an open area off the road. It looked like flat area for a quick stop, at least for the surface.All because he is too cheap to buy an EV that actually manages the battery temperature. This guy is the poster child of how not to drive an EV. -- Rick C. + Get 1,000 miles of free Supercharging + Tesla referral code - https://ts.la/richard11209
