Dead Honda e

Faults and Technical chat for the Honda E
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hurricaneh5
Posts: 12
Joined: Sun Jan 07, 2024 10:12 am

Post by hurricaneh5 »

Marcin wrote: Thu Jan 18, 2024 4:55 pm Samochody elektryczne wymagają więcej troski , lepszych warunków (garażu),więcej wiedzy technicznej klienta,niż zwykły samochód spalinowy.To potrwa kilka lat napewno.Są to problemy typowe wieku dziecięcego.Dotyczy Hondy E i ogólnie wszystkich elektryków.Są pionieży tacy jak my .Musimy liczyć się z takimi małymi problemami.Zazwyczaj są to pierdoły do szybkiego załatwienia.Jak dla mnie to nie stanowi problemu,choć rozładowana bateria,była zaskoczeniem
W moim przypadku ,była to ładowarka zamiennik,co po naładowaniu 100% Ev ,cały czas pobierała prąd z 12v bateri.Teraz to wiemi nie mam problemu.Zalecam kupić monitor bateri kilka € i szybko znajdziecie swój problem.Miałem kilkanaście aut w swoim życiu.Honda E jest na 1 miejscu,przypomina najbardziej Crx,który był pierwszą miłością i mam go do tej pory :)
Well said that man 👍🏻

rc203
Posts: 6
Joined: Wed Apr 03, 2024 12:48 pm

Post by rc203 »

@EEEE how have you got one since you did the 12v battery upgrade? Still holding charge well? I’m considering going for a 55Ah EFB Endurolune battery. I’ve just picked up a 2021 E and my 12v seems to be sitting around 12.2v with no load, think it might need replacing.
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EEEE
Posts: 569
Joined: Mon Aug 16, 2021 10:33 am

Post by EEEE »

I've had 0 problems since fitting the larger 65ah yuasa battery. Max voltage is over 13v (the car will not charge the 12v and bring this down during use) and the lowest after 2 weeks of sitting idle whilst on holiday (not plugged into the mains) was 12.41v so the car wasn't flat and I could get into it (which was a surprise!).

The larger battery does not fit properly into the battery tray, and the bracket does not fit either, but these are small prices to pay for a little assurance.
'21 e Advance - Charge Yellow - E1702RR alloys
'17 Civic Sport CVT
'00 Prelude 2.2VTi
rc203
Posts: 6
Joined: Wed Apr 03, 2024 12:48 pm

Post by rc203 »

Great stuff, thanks. Any additional routine 12v battery charging by yourself or just normal use (driving and HV charging).
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EEEE
Posts: 569
Joined: Mon Aug 16, 2021 10:33 am

Post by EEEE »

I have never performed additional 12v charging with the new battery (only when the car was flat on the old OEM Panasonic battery). I drive the car 5 times a week (2x 30minute commute + small lunch time excursions).

I was pleasantly surprised that after my 2 week holiday, the new battery wasn't flat! it was low, but the car was useable. Lock+unlock on the fob made the car wake up and do 1hour of charging. I suspect this might not happen when the battery is too flat / defective. To me, everything seems working properly.
'21 e Advance - Charge Yellow - E1702RR alloys
'17 Civic Sport CVT
'00 Prelude 2.2VTi
s2ke
Posts: 20
Joined: Fri Dec 20, 2019 7:00 am

Post by s2ke »

The car will charge the 12v with fan on

I have an accessory socket voltmeter and it shows charging pretty fast after you switch it on..I've not noticed it stop tbh

All my 12v issues were caused by sticking handled
green1
Posts: 34
Joined: Tue Mar 26, 2024 1:18 am

Post by green1 »

s2ke wrote: Sun Apr 28, 2024 9:28 pm The car will charge the 12v with fan on

I have an accessory socket voltmeter and it shows charging pretty fast after you switch it on..I've not noticed it stop tbh

All my 12v issues were caused by sticking handled
I have also noticed this with the fan/blower, if you set it to max (not any of the lower levels), the charging logic of the car will cause the HV to immediately start charging the 12V. This seems to occur every time without fail and can be confirmed directly with a Bluetooth monitor on the battery, from the 12V socket or from an OBD reader. So pretty much just use the fan occasionally and provided the door handles aren't glitching out I think sudden death is not a problem even with the stock battery.
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EEEE
Posts: 569
Joined: Mon Aug 16, 2021 10:33 am

Post by EEEE »

Using the demister or blower will cause the 12v circuit to get very high (up to 14.8v I believe at the bat terminals as measured with a BM2).

However - this is not really the solution to the problem. Charging a 12v battery and keeping it 'happy/healthy' is more than just blasting 14.8v at it for a short while. Perhaps you can buy yourself some time by gaming the system and driving with your blower on full, at the expense of your quiet cabin and blower motor wearing out.

The lack of overall oversight of the charging and inconsistency of methods used throughout the batterys lifetime, along with it being undersized and prone to draining below 10.5v, is what causes the OE battery to die.
'21 e Advance - Charge Yellow - E1702RR alloys
'17 Civic Sport CVT
'00 Prelude 2.2VTi
green1
Posts: 34
Joined: Tue Mar 26, 2024 1:18 am

Post by green1 »

I agree with your post. Oh I don't mean that it's a real solution, it's more of a battlefield repair. I don't actually use it in the manner described, although I do like putting the fans on at high briefly in this weather, but what I meant to say is I will keep an occasional eye on the voltmeter in the 12V socket if parked for an extended period, and I know that if it's going lower than it should, then "blasting" :D the fans should at least prevent a full brick.
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