The Swappable Rental EV Pallet Battery  - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: January 31, 2022, 01:41:06 pm
content: agree or disagree with this idea.some ideas for making the average EV more affordable.the L shaped rectangler interchangeable pallet batterythat can be slid under the electric vehicle locking in place in seconds.no dedicated swopping infrastructure or autolift hoist would be needed,only a special pallet jack and twin pallet battery charging cradles.always leaving one spare charging cradle for the pallet battery that comes out of the EVcharging cradle would be small enough for home use.leaving you with the option of charging the pallet battery in the vehicle or out of the vehicle at home.the swappable EV pallet battery designthe upright part of the battery case enclosure houses the battery cooling radiator.the cooling fans are part of the vehicles design.the in-vehicle battery cradle can be rear or front in design, with the vehicles e-motor axle the other end.idea here is that electric vehicles would be sold without a battery. so cheap to own carsEV pallet batteries would be similar to swap-and-go BBQ gas bottles or cordless power tool batteries.the cost of a interchangeable EV pallet battery would be set by its size-capacity & age odometerthe number of charge and discharge cycles the unit has had.size-capacity of pallet batteries would be the length of the under case & the size of the upright radiator on one end of the case.the idea isto have aEV battery rental systemthat makes EV's cheap to own.as cost is set by the range & age of the rental battery in the vehicle.you could still own a pallet battery if you like. just as you can own a BBQ gas bottle.the size and cost is up to you!EV body designthe in-vehicle battery cradle would be at one end of the EV under the bonnet at the front in a rear-wheel drive.or a rear in-vehicle battery cradle design. under the boot at the rear in a front-wheel drive.a requirement of any swappable EV pallet battery design is that the bottom of the battery cradle must be open C guide rail to the road.so the special pallet jack can slide under the pallet battery to remove it from the EV.why post this?if this idea will make electric vehicles affordable.EV battery swapping is not new but most I have seen need intensive autolift vehicle hoist infrastructure and so are expensivealso only use one size or capacity of battery and or need complicated two part cooling systems.the idea of developing an L shaped rectangler interchangeable pallet batteryis that it is a sealed cooling system the battery has its own onboard sealed cooling system ideas from refrigeration technologythe upright L is the pumps & the cooling radiator of the battery. and the cooling fans are part of the EV bodywork.agree or disagree with this post as you like. I do not know more then I post here.maybe you have a better ideas of developing interchangeable battery

author: f4eru
author_rank: Super Contributor
timestamp: January 31, 2022, 01:59:35 pm
content: Renault pioneered it in Israel.Tesla tried it out, abandonned the concept quickly.Nio has this in series :https://www.just-auto.com/news/nio-opens-700th-battery-swap-station-in-china/In the long run, I think this will either disappear, or stay around only as a small niche product because :1) Too high cost of infrastructure2) too sparse network3) complexity, weight and cost of the vehicle. Many elements to be added to the vehicle to support quick dropping safely. It ain't easy, especially with crashworthiness.4) impossibility of all the upcoming structural batteries -> this is the future5) impossibility of several vehicle body forms. <- too much very long term constraints on vehicle design6) Unwillingness of users to give up owning the vehicle.It's a solution in serach for a problem.It's just not worth the effort.Fast charge is not a problem any more with modern EVs.In average on a year, as a normal (non-taxi) user, you spend much less time at a charging station than with an ICE at fuel pump.Sure it is a bit more in long trips. But everyday, it drops to zero. Full "tank" every morning.It could be useful for motorcycle taxis in poorer countries, where it is in use already.

author: ejeffrey
author_rank: Super Contributor
timestamp: January 31, 2022, 04:54:16 pm
content: Adding capability for quick battery replacement won't decrease costs it will increase them as swappable battery packs will require stronger, bulkier housings and be less able to fit a given battery capacity in a fixed size vehicle. It will also decrease utility of the vehicle itself in other ways as the body needs to be laid out around the battery swap mechanism. This will likely impact the front or rear cargo area, and possibly the aerodynamics and thus range. Unlike a electric bike or small moped, even the smallest car battery can't be handled by a single person, so your battery swap system requires expensive and complicated machinery similar to a forklift at every swapping station, and more complicated if it has to be completely automated so a driver can do it with a push-button rather than a trained operator. It's not impossible to design, but it adds to the cost.If the problem you are trying to solve is upfront purchase cost, that is a problem that is already exists for ICEs which are too expensive for many people to purchase outright. The solution to that is loans, leases, and taxis which can often be predatory but battery swap technology won't really make that better.EV battery swap is a solution to end user charging. It's more expensive overall, but in situations where it's impractical to deploy the charging infrastructure or possibly some niche fleet vehicle operations where the downsides can be mitigated. But for most cases it will be more expensive and unnecessary.One other factor that makes EVs currently more expensive is that the market is rapidly growing so the used vehicle fleet is relatively small. There are far more EVs sold now than there were >= 3 years ago that are candidates for used vehicle. Also given the rapid rate of advancement many older vehicles are less desirable, and the ones that are desirable are very expensive due to the small supply. As the market matures there will be wider availability of desirable used vehicles at reasonable prices. One thing that might help reduce long term cost of ownership is batteries designed for better service including by 3rd parties. We have seen this with hybrids already: if you have a prius with 200,000 miles and a bad battery you can get the pack rebuilt much cheaper than buying a new one. The ability to replace individual modules or cells can increase the lifetime of used vehicles. So far, very few EV batteries have reach EOL so it's hard to see how this will play out in the long run.