Leaf battery degradation case A: AZE0 24 kW⋅h—part 3 2021-10

Posted on 24 December 2021 in Electric vehicles

Part 3 in a series following the state of health (SoH) degradation of a Nissan Leaf AZE0 24 kW⋅h battery.

Vehicle specification:

Vehicle:Nissan Leaf
Type:ZAA-AZE0
MY:2013

Articles in the series Nissan Leaf battery degradation case A: AZE0 24 kW⋅h:

  1. Part 1 2019-10.
  2. Part 2 2020-10.
  3. Part 3 2021-10 (this article).
  4. Part 4 2022-11.

Summary

2020-10/2021-10
Period Distance ∆SoH
12 months 9 379 km −3.64 pp
  • In the year ending October 2021 the vehicle travelled 9 379 km and the SoH reduced by 3.64 percentage points.

Data

Battery parameters were recorded using Leaf Spy Pro for Android. The table below shows the battery parameters for the year ending October 2021.

Battery degradation 2020-10/2021-10 as recorded by Leaf Spy.
Date Odometer (km) A⋅h SoH (%) Hx (%) Fast charges Type 1,2 charges
2020-10-25 39481 53.48 81.77 75.38 27 1396
2020-11-17 40000 53.10 81.20 74.72 27 1417
2020-12-24 41386 56.42 86.27 80.88 37 1434
2021-01-04 42111 55.84 85.38 79.76 46 1440
2021-02-08 42834 52.80 80.73 74.16 46 1469
2021-04-03 44197 52.64 80.51 73.90 46 1524
2021-05-06 45048 52.05 79.85 72.79 46 1572
2021-06-05 45760 51.90 79.36 72.54 47 1618
2021-07-02 46232 51.72 79.08 72.20 47 1644
2021-08-01 46912 51.72 79.09 72.22 47 1682
2021-09-02 47279 51.93 79.41 72.59 48 1698
2021-10-01 48032 51.72 79.08 72.21 49 1732
2021-11-01 48860 51.10 78.13 71.08 50 1772

Battery degradation 2020-10/2021-10 CSV file.

Observations

  1. The count of Type 1 and 2 charges is higher than actual due to the Leaf's built-in charge timer recording one charge when the vehicle is plugged in, and a second when the timer initiates charging.

  2. The increase in SoH from 81.20% to 86.27% in December 2020 is due to a series of quick charges made on an inter-city journey.

  3. In the year ending October 2021 the vehicle travelled 9 379 km and the SoH reduced by 3.64 percentage points.

  4. On 2021-09-26 it was observed that the eleventh battery capacity level bar had been lost.

    Eleventh battery capacity bar lost in September 2021.
  5. From 2021-03-13 the vehicle was parked uncovered.