Nissan Cycle Aging Report

Energy Storage Innovation Lab

Date written: 2022-10-15

Written By: Ben

Table of Contents

Cycle Count

Nissan Pack 5: Cycle 1186 of 2190

50%

Nissan Pack 6: Cycle 1519 of 2190

50%

Nomenclature

Terminology Definition
NP # Nissan Pack. The number specifies which pack.
Aging Refers to the type of test being conducted.
Pack / Module / Cell Each pack has 8 modules in series. Each module has 2 cells. Therefore there are a total of 16 cells in a pack.
Characterization Two charge and discharge cycles, followed by flicks. Characterization is conducted to characterize the battery's capacity.
Drive Cycle A type of test conducted to allow calculation of the internal resistance for the battery.
Aging Simulates real life usage of the battery throughout its life cycle.
*See Appendix for examples of characterization, drive, and aging test cycles.

Timeline of all tests included in report

Pack # Week of Aging/Char Start Date End Date
5 Aging 53 10/02/2022 10/10/2022
6 Drive Cycle 16 10/10/2022 10/12/2022

Test Specifications

Testing cycles are conducted in the following order
  1. Characterization and drive cycle
  2. Characterization and aging
  3. Characterization and aging
  4. Characterization and aging
  5. Characterization and aging
  6. Repeat from beginning
Testing Cycle Boundaries
  1. The lower cell voltage limit is 2.9 V
  2. The upper cell voltage limit is 4.1 V
  3. The maximum current limit is 40 A

Summary Graphs

State of Health Summary

NP5 SOH Summary
NP6 SOH Summary

Internal Resistance Summary

NP5 IR Summary
NP6 IR Summary

Test Progress Gantt Chart

Gantt Chart

Recent Delays / Issues

None

Appendix

Documents the test details

Characterization

Drive Cycle

Aging Cycle