tag:blogger.com,1999:blog-9193111756116515621.post4756422044035051050..comments2022-03-23T23:35:15.295-07:00Comments on Open Source Civic EV Kit: A New HopeTimKhttp://www.blogger.com/profile/09059780797709299125noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-9193111756116515621.post-91560369259937397582009-09-08T01:59:46.173-07:002009-09-08T01:59:46.173-07:00Tim,
Martin from the UK, here. You may recall I w...Tim,<br />Martin from the UK, here. You may recall I was having issues with my Charge Detector too.<br /><br />I have gone with the G2 charger upgrade option and am waiting for it to arrive. In the end, my 20kWh pack really needs the extra charge rate to allow it to charge fully within a half-reasonable time (8 hours) and allows all the charging to be done overnight during the 'off peek' time which costs 1/3 of daytime peak rate electrcity (off-peek = 6p/kWh in the UK). <br /><br />Meanwhile, I too have modified the G1.5 system I have by adding a simple opto + transistor inverted amp to the OVP output (from the IsoBatMon) which allows it to switch off a relay that was latched on by a push button at charge commencement. So after an initial 'bulk charge' the relay switches in the big resistor (20 ohm in my case) and reduces the currant from around 10A down to around 1A. <br /><br />This is low enough for the LionMon's 4 ohm by-pass resistor to cope with when the cell reaches the 3.85V OVP threshold allowing for cell balancing after the bulk charge phase. Further, even when all the cells are up to 3.85V, they can sit there happily indefinately until you switch of the charger. Just wastes a bit of juice. I'll email you a schematic of the circuit if you are interested. Just let me know.<br /><br />I'm probably going to use a 556 as a dual flip-flop to reduce the frequency of my DIY tacho sensor which is a top-dead-centre sensor out of an ICE with a home made clamp on shaft collar with a couple of magnets embedded in it.<br /><br />Meanwhile my van is getting me 20 miles to work and back quite happily - and saving me £4 ($US6.40) every time. Only another 10 years to go before I break even! MWmartinwinlowhttps://www.blogger.com/profile/10522319288554000017noreply@blogger.com