Issue 1611 cccv

[valentinsulzer]

Description

Fixes #1611

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #) - note reverse order of PR #s. If necessary, also add to the list of breaking changes.

• New feature (non-breaking change which adds functionality)
• Optimization (back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)

Key checklist:

• No style issues: $ flake8
• All tests pass: $ python run-tests.py --unit
• The documentation builds: $ cd docs and then $ make clean; make html

You can run all three at once, using $ python run-tests.py --quick.

Further checks:

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

Merging #1612 (b2e8670) into develop (1ef394e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop    #1612   +/-   ##
========================================
  Coverage    97.92%   97.93%           
========================================
  Files          324      324           
  Lines        18150    18216   +66     
========================================
+ Hits         17773    17839   +66     
  Misses         377      377           

Impacted Files	Coverage Δ
...bamm/models/submodels/external_circuit/__init__.py	100.00% <ø> (ø)
pybamm/solvers/base_solver.py	99.18% <ø> (ø)
pybamm/experiments/experiment.py	100.00% <100.00%> (ø)
...m/models/full_battery_models/base_battery_model.py	99.69% <100.00%> (+<0.01%)	⬆️
...ternal_circuit/current_control_external_circuit.py	100.00% <100.00%> (ø)
...ernal_circuit/function_control_external_circuit.py	98.64% <100.00%> (+0.57%)	⬆️
pybamm/simulation.py	98.00% <100.00%> (+0.03%)	⬆️

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[rtimms]

Neat! Thanks, @tinosulzer!

[rtimms]

Might be useful to add a comment or point to a reference saying why you get maximum here