HV battery parts

14126 Views 106 Replies 19 Participants Last post by bill.kichman, 4 d ago

SFmike

Discussion Starter · Sep 11, 2019

Hi ?

Wanted to see if anyone can help me locate a battery current sensor for my 2014 Smart ED.

Any help is greatly appreciated

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Yinzer

· #2 · Sep 11, 2019

Unfortunately, you image is not showing due to you being a new member.

Is this the same current sensor talked about in the link below - with some vague possible connection with bricked battery packs which nobody makes clear?

https://github.com/MyLab-odyssey/ED_BMSdiag/issues/19

SFmike

Discussion Starter · #3 · Sep 11, 2019

Hi.
Yes that is the sensor I’m looking for. I called Smart/Benz and I even called Bosch, they do not sell it on its own.

I tried to look for options, like a aftermarket sensor, a sensor from another car, besides the stated Fiat 500e sensor that someone else use. I found nothing, I’ve been tried eBay. If anyone has a lead on a Used HV pack with a good sensor. I greatly appreciate it. Or if someone knows another sensor from another car (besides Fiat 500e) that will work.

I’m even willing to buy from out of country. Haha.

Thank you all

Yinzer said:
Unfortunately, you image is not showing due to you being a new member.

Is this the same current sensor talked about in the link below - with some vague possible connection with bricked battery packs which nobody makes clear?

https://github.com/MyLab-odyssey/ED_BMSdiag/issues/19

sokoloff

· #4 · Sep 11, 2019

Can you tell us more about what's going on with your car? We have had multiple discussions here about HV battery issues a few owners have had and we are trying to figure out the causes and connections and of course the fixes.

Thanks.

Len
2014 EV Coupe 19,000 miles
2014 EV Cabriolet 13,500 miles

Reactions: 1

Yinzer

· #5 · Sep 12, 2019

Yes, what happens when the sensor fails? Is it associated with the battery pack getting discharged flat?

SFmike

Discussion Starter · #6 · Sep 12, 2019

Hi

Sorry for the late reply

I have a Fault codes for my BMS and sent my BMS our for repairs (was not cheap). Once that was back it was told that it had common problems and guaranteed that all is fix within the BMS. After installing the BMS back into the HV battery and started to see signs of life again as I did a quick initial start up and shut down so I can clean up and get moving. Little did I know there was a few more fault codes. These fault codes are apparently linked to the current sensor, I had a few mechanics checked the codes, clear it and it still there, looked around online and found info on the link u posted as it was the same codes as that, then sent the same codes to person that repaired my BMS and he also confirm it’s the current sensor is bad.

I called friends at Benz/Smart and no luck as they don’t sell that sensor by itself, called Bosch and they don’t sell it to anyone as it’s licensed to Smart/Benz only. So here I am looking for a good used one in hopes that it will fix my problem.

Removing and disassembling the HV battery is not fun. Did it 3 times already. If anyone attempts this. Be VERY careful.

sokoloff said:
Can you tell us more about what's going on with your car? We have had multiple discussions here about HV battery issues a few owners have had and we are trying to figure out the causes and connections and of course the fixes.

Thanks.

Len
2014 EV Coupe 19,000 miles
2014 EV Cabriolet 13,500 miles

See less See more

Reactions: 1

sokoloff

· #7 · Sep 12, 2019

Thanks Mike. Keep us in the loop and keep us updated. You never know - someone here might stumble onto something that could help you and vise versa. As Mercedes disappears from the picture for us, more and more of us are going to need to become more aware of what's happening with our cars.

Good luck.

Len
2014 EV Coupe 19,000 miles
2014 EV Cabriolet 13,500 miles

SFmike

Discussion Starter · #8 · Sep 12, 2019

Len

Np I will update as I get info in and if or when I get the faults from the HV battery repaired.

sokoloff said:
Thanks Mike. Keep us in the loop and keep us updated. You never know - someone here might stumble onto something that could help you and vise versa. As Mercedes disappears from the picture for us, more and more of us are going to need to become more aware of what's happening with our cars.

Good luck.

Len
2014 EV Coupe 19,000 miles
2014 EV Cabriolet 13,500 miles

Reactions: 1

GoSmart Service

· #9 · Feb 5, 2020

I have for sale, completely our development. Contact me in Viber or WhatsApp +380931130000

SFmike said:
Hi

Sorry for the late reply

I have a Fault codes for my BMS and sent my BMS our for repairs (was not cheap). Once that was back it was told that it had common problems and guaranteed that all is fix within the BMS. After installing the BMS back into the HV battery and started to see signs of life again as I did a quick initial start up and shut down so I can clean up and get moving. Little did I know there was a few more fault codes. These fault codes are apparently linked to the current sensor, I had a few mechanics checked the codes, clear it and it still there, looked around online and found info on the link u posted as it was the same codes as that, then sent the same codes to person that repaired my BMS and he also confirm it’s the current sensor is bad.

I called friends at Benz/Smart and no luck as they don’t sell that sensor by itself, called Bosch and they don’t sell it to anyone as it’s licensed to Smart/Benz only. So here I am looking for a good used one in hopes that it will fix my problem.

Removing and disassembling the HV battery is not fun. Did it 3 times already. If anyone attempts this. Be VERY careful.

See less See more

ColinK

· #10 · Sep 19, 2021

Go Smart Service...do you have an email address...thks

Yinzer

· #11 · Sep 19, 2021

As an update, my understanding is that the current sensor fails as a consequence of recharging the battery pack cells with it connected. The circuit through it must be opened by removing a bus bar, and also disconnecting the signal wire until the pack is charged full and balanced.

ColinK

· #12 · Sep 19, 2021

Hey guys...check this out...https://www.ebay.com/itm/https://www.ebay.com/itm/Battery-Current-Sensor-Electronic-Battery-Sensor-New-Bosch-0199200180/324452363727

ColinK

· #13 · Sep 19, 2021

Any thoughts??

Vincent Rapide

· #14 · Sep 19, 2021

The 'battery current sensor' is attached to one of the 12v battery posts. The 'hv current sensor' is inside the hv battery box.

The question here is: what exactly blew the hv cs? In the past it has been blown by trying to charge the hv battery by feeding thru the cs instead of connecting directly to the Li-Ion cells. Do NOT charge thru the cs even if you are using cc/cv power supply.

Tell us the whole story behind this sensor failure, please.
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ColinK

· #15 · Sep 20, 2021

Has anyone seen the procedure for replacing individual cell in the battery pack??...wondering how to splice the connections

Vincent Rapide

· #16 · Sep 26, 2021

So you have 2 hv batt boxen and want to replace shorted cells with good ones from the other box?

Just checking.
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ColinK

· #17 · Sep 26, 2021

Yes...just purchased a battery pack from a wrecking yard and will be using the pouch cells to replace my bad cells...wish me luck!!

Reactions: 1

DudeInTheSmart

· #18 · Sep 27, 2021

Good luck, watching this out of interest...

ColinK

· #19 · Sep 27, 2021

Anyone have an ultrasonic welder in the 20khz range I could borrow??...LOL

Vincent Rapide

· #20 · Sep 28, 2021

That's why I don't consider the Smart hv batt to be repairable. Moving cells around is not a bolt-unbolt scenario as it is with other EVs. All I can see doing is jumpering over bad cells by soldering to the copper areas and using for a low power solar storage. The inverter draws a lot of amps so good luck.
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