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or check that first page
http://www.hillrc.com/UploadFiles/Re...s-iCharger.txt |
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I'd be interested in other opinions on this as until now I've left my chargers on the default setting (balance in CV phase), but am wondering about using the storage setting, which commences balancing once the cell voltage is above the storage voltage. |
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Junsi,
firstly let me compliment you on both your products and your great approach by actually speaking with your customers online and dealing with any issues that arise. I have a couple of querstions for you as I want to use both you cell log 8S and icharger for bench testing series packs of cells. I have 2 of the cell log 8s and 1 icharger 208B. They are nice units. 1. i know it is not possible to run more than 2 cell log 8S on a bigger pack and connect them to a PC at the same time for live logging. Is there any possible way to overcome this point? Either externally or internally to the unit? 2. Is it ok to monitor several 8S indepependent packs (not tied together into a bigger series pack) with several cell log 8S on the same PC. I feel this is no problem as each pack should be floating, but please confirm. 3. I think I have damaged an Icharger 208B USB port by accidently connecting it to my PC whilst also connected to a 16S pack that was being monitored by a cell log 8S. Now whenever I try to connect the Icharger it shows unrecognised device on my PC. Can this be repaired? 4. Does using the monitor function on the Icharger prevent the USB problem with multiple devices connected to a bigger series pack or is the balance port also referenced to ground? I will have to visit you office sometime soon. I'm based in Shanghai and involved in the EV business. I'm interested in possibly retailing some of your products and maybe getting a custom design on the Cell Log 8S for the EV market. Thanks Paul |
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Hi Junsi,
you really should try to make your modified USB cables in some way distinguishable from a standard USB cable. This really is a problem waiting to happen and probably contributed to me damaging my Icharger. Can you please detail the difference on your lead so that I can confirm which USB lead I should be using. Thanks Paul |
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Take a meter (DVM) set it to Ohms , check continuity from shield to shield (exposed metal ends). The one for the iChargers will show an open circuite.
Place a lable on it, put a piece of heat shrink on it and mark the iCharger with pait(matching color) where it connects. Keep the iCharger USB cable in an icharger box, there must be 100 ways to do thisd but yes they should have a label attached from the factory as should all others which are not completely stanadard. Charles |
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PC's or laptops may or may not have a small value resistor for this purpose on them. The USB logic circuitry is built into a large multi-purpose integrated circuit chip on the main logic board. So if a voltage difference happens it could blow out the IC on the MLB causing the PC to quit working. Some PC's may have a tiny fuse, but it is more common for it to be a low value resistor. Some more expensive PC's put in special circuitry to prevent this ground difference from being a problem They may isolate the chassis ground to prevent it by using optocoupler devices to protect the PC. The resistor could be from 1 ohm to 10 ohms as used for this purpose. Resistors are a lot cheaper than fuses. So you will likely see resistors being used as fuses. |
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