Referring to this article:
https://pushevs.com/2020/04/04/comparison-of-different-ev-batteries-in-2020/
the cells used in the Kona Electric are LGX-E63 type cells.
I am going to try to post a link (PDF) on the specs, but if it does not work- google lgx e63 cell and click Queen Battery.com PDF link - lg e63 datasheet - Queen Battery:
http://queenbattery.com.cn/index.php?controller=attachment&id_attachment=109
Skip right to the 2.4 section Protection limit specification
Item: overvoltage limit - "The battery may experience this voltage on an infrequent basis. When the battery's voltage reaches this limit, the charging power shall be reduced to zero"
Specification:
4.40 V @ normal
4.3 V at charge
Item : over voltage limit - "The battery shall not be used over this limit"
Specification :
4.45 V
Item : under voltage limit - " The battery shall not be used below this limit"
Specification :
2.00 V
The items that interests me the most are the 4.40 V normal and 4.3 V charge overvoltage limit.
This clearly spells out the fact that the voltages developed here on a 2019 model:
https://insideevsforum.com/communit...-reduce-cell-capacity.9707/page-8#post-112844
and as shown in other posts on this forum using Torque Pro etc, are well within those limits.
On a later manufactured model Kona EV ( mid May 2020 model) I will use this example as it is probably the best we have to work with at this point):
https://www.speakev.com/threads/ffs-failed-12v-battery-already.153262/#post-2886948
and the readings:
https://www.speakev.com/threads/kona-battery-voltage.153409/#post-2890001
indicate that the BMS overvoltage limit has not changed, yet it is out of the Hyundai October recall date range of Sept 29/2019 and March 13/2020 (or 2019 , 2020 Transport Canada dates):
https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/detail.aspx?lang=eng&mk=3759!39386&mkName=HYUNDAI&md=KONA EV&fy=0&ty=9999&ft=&ls=0&sy=0&syName=All Systems&all=0&rn=2020477&cf=SearchResult&pg=0
One more thread that has caught my attention is this one :
https://insideevsforum.com/communit...er-lasted-bms-update-we-found-7th-cases.9781/
So after this long post (sorry about that) my questions are this
Were the LG - E63 cells manufactured within the October/20 recall dates manufactured - not up to spec?
What changed after March 2020.
Is this new Oct /20 BMS update a band-aid, postponing inevitable entire battery pack replacements, or will changing a few cells be a complete solution?
According to the spec sheet, these cells should be able to handle a lot more than the demonstrated limits that the BMS provides.
https://pushevs.com/2020/04/04/comparison-of-different-ev-batteries-in-2020/
the cells used in the Kona Electric are LGX-E63 type cells.
I am going to try to post a link (PDF) on the specs, but if it does not work- google lgx e63 cell and click Queen Battery.com PDF link - lg e63 datasheet - Queen Battery:
http://queenbattery.com.cn/index.php?controller=attachment&id_attachment=109
Skip right to the 2.4 section Protection limit specification
Item: overvoltage limit - "The battery may experience this voltage on an infrequent basis. When the battery's voltage reaches this limit, the charging power shall be reduced to zero"
Specification:
4.40 V @ normal
4.3 V at charge
Item : over voltage limit - "The battery shall not be used over this limit"
Specification :
4.45 V
Item : under voltage limit - " The battery shall not be used below this limit"
Specification :
2.00 V
The items that interests me the most are the 4.40 V normal and 4.3 V charge overvoltage limit.
This clearly spells out the fact that the voltages developed here on a 2019 model:
https://insideevsforum.com/communit...-reduce-cell-capacity.9707/page-8#post-112844
and as shown in other posts on this forum using Torque Pro etc, are well within those limits.
On a later manufactured model Kona EV ( mid May 2020 model) I will use this example as it is probably the best we have to work with at this point):
https://www.speakev.com/threads/ffs-failed-12v-battery-already.153262/#post-2886948
and the readings:
https://www.speakev.com/threads/kona-battery-voltage.153409/#post-2890001
indicate that the BMS overvoltage limit has not changed, yet it is out of the Hyundai October recall date range of Sept 29/2019 and March 13/2020 (or 2019 , 2020 Transport Canada dates):
https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/detail.aspx?lang=eng&mk=3759!39386&mkName=HYUNDAI&md=KONA EV&fy=0&ty=9999&ft=&ls=0&sy=0&syName=All Systems&all=0&rn=2020477&cf=SearchResult&pg=0
One more thread that has caught my attention is this one :
https://insideevsforum.com/communit...er-lasted-bms-update-we-found-7th-cases.9781/
So after this long post (sorry about that) my questions are this
Were the LG - E63 cells manufactured within the October/20 recall dates manufactured - not up to spec?
What changed after March 2020.
Is this new Oct /20 BMS update a band-aid, postponing inevitable entire battery pack replacements, or will changing a few cells be a complete solution?
According to the spec sheet, these cells should be able to handle a lot more than the demonstrated limits that the BMS provides.
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