How to charge HV batteries off car?
How to charge HV batteries off car?
Hi, this is probably a newby question,. But what is the simplest way to charge HV automotive batteries up when they're not connected to the car?
I want to use my Lexus hybrid battery pack as a test battery to get things moving but I need to charge it up first,. And I guess I'll need to do the same once I have purchased my proper battery.
What is the recommended method?
(Please bear in mind I am not an electrical engineer so can't knock something up using a Prius inverter and some copper wire)
Thanks
Dan
I want to use my Lexus hybrid battery pack as a test battery to get things moving but I need to charge it up first,. And I guess I'll need to do the same once I have purchased my proper battery.
What is the recommended method?
(Please bear in mind I am not an electrical engineer so can't knock something up using a Prius inverter and some copper wire)
Thanks
Dan
Re: How to charge HV batteries off car?
For a hybrid pack, especially Toyota/Lexus ones, my suggestion would be one module at a time while secured in their case.
Huebner VCU controlling a Gen2 Prius Inverter powering an MGR
"Talent is equally distributed but opportunity is not." - Leila Janah
"Talent is equally distributed but opportunity is not." - Leila Janah
-
- Posts: 656
- Joined: Sat Oct 05, 2019 6:50 pm
- Location: Northern California, USA
- Been thanked: 1 time
- Contact:
Re: How to charge HV batteries off car?
As ZooKeeper said. You can either use a proper charger or just a simple lab power supply - those have both current and voltage control so they charge batteries safely, also they're generally useful for EV conversion work.
Re: How to charge HV batteries off car?
Yea, I know... so useful I am amassing a collection of them
Huebner VCU controlling a Gen2 Prius Inverter powering an MGR
"Talent is equally distributed but opportunity is not." - Leila Janah
"Talent is equally distributed but opportunity is not." - Leila Janah
-
- Posts: 3283
- Joined: Mon Dec 24, 2018 1:37 pm
- Location: Slovenia
- Has thanked: 80 times
- Been thanked: 239 times
- Contact:
Re: How to charge HV batteries off car?
See here is a hard core method, but it works for every kind of automotive battery you can imagine .Dan--T wrote: ↑Tue Jul 06, 2021 11:21 pm Hi, this is probably a newby question,. But what is the simplest way to charge HV automotive batteries up when they're not connected to the car?
I want to use my Lexus hybrid battery pack as a test battery to get things moving but I need to charge it up first,. And I guess I'll need to do the same once I have purchased my proper battery.
What is the recommended method?
(Please bear in mind I am not an electrical engineer so can't knock something up using a Prius inverter and some copper wire)
Thanks
Dan
https://leafdriveblog.wordpress.com/202 ... r-charger/
You can get a smaller version autotransformer for single phase connection and it will work up to 300Vdc or so.
If you dont need to have a fast charging then i recommend you buy a simple PSU for voltage you need to get battery to.
- rstevens81
- Posts: 355
- Joined: Sun Dec 22, 2019 10:36 am
- Location: Bristol, UK
- Has thanked: 23 times
- Been thanked: 92 times
Re: How to charge HV batteries off car?
If they are in simple modules you can charge each module by themselves with a cheap lion charger from China land (if you open them up you can change the charge point voltage)
I did this 12 at a time to 3.75volts (45v) to put my modules into a storage state. I also monitored the BMS to be extra safe.
I did this 12 at a time to 3.75volts (45v) to put my modules into a storage state. I also monitored the BMS to be extra safe.
Rule 1 of EV Club is don't buy a rust bucket....
Which rule does everyone forget
Which rule does everyone forget
Re: How to charge HV batteries off car?
Ok, I ideally didn't want to have to split open the battery pack but if that's the best/ only feasible way to do it I can.
So I think each lexus cell is 7.2v,. So I just need to buy a power supply capable of over 7.2v and do them all one at a time?
So I think each lexus cell is 7.2v,. So I just need to buy a power supply capable of over 7.2v and do them all one at a time?
Re: How to charge HV batteries off car?
The modules are wired in series, the only way to do them all at once @ 7.2v is to turn every other one around so all the (-) & (+) terminals are on the same side.
Huebner VCU controlling a Gen2 Prius Inverter powering an MGR
"Talent is equally distributed but opportunity is not." - Leila Janah
"Talent is equally distributed but opportunity is not." - Leila Janah
-
- Posts: 751
- Joined: Tue Oct 29, 2019 2:48 pm
- Location: France
- Has thanked: 352 times
- Been thanked: 44 times
- Contact:
Re: How to charge HV batteries off car?
What about the prius gen 2 Inverter as charger? There's a thread and quite some work done. Needs some fine tuning and testing from what I understand. I hope to get into that part pretty soon as I too have a hybrid pack that needs recharging. If I understand correctly, if there is no bms, current and voltage has to be real low as the weakest modules are going to take most of the first phase of charging.
- marcexec
- Posts: 123
- Joined: Tue May 14, 2019 12:52 pm
- Location: Dublin, Ireland
- Has thanked: 551 times
- Been thanked: 45 times
Re: How to charge HV batteries off car?
If you have to buy, I can recommend Meanwell LED power supplies. They come in various voltages and power levels and are current and voltage adjustable. I run a pair of waterproof HLGs to charge my bike overnight without issues (after switching to waterproof...).
A motorcyclist is never late, Frodo Baggins. Nor is he early. He arrives precisely when he means to.
Getting started guide for Celeron55's iPDM56
My Suzuki RF400 build @ES
Honda IMA & Lebowski howto
Getting started guide for Celeron55's iPDM56
My Suzuki RF400 build @ES
Honda IMA & Lebowski howto