Modular converter system for low-cost off-grid energy storage using second life li-ion batteries
Lithium ion batteries are promising for small off-grid energy storage applications in developing countries because of their high energy density and long life. However, costs are prohibitive. Instead, we consider “used” Li-ion batteries for this application, finding experimentally that many discarded...
| Main Authors: | , , , , |
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| Format: | Conference item |
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Institute of Electrical and Electronics Engineers
2014
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| _version_ | 1826289669621415936 |
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| author | Birkl, C Frost, D Bizeray, A Richardson, R Howey, D |
| author_facet | Birkl, C Frost, D Bizeray, A Richardson, R Howey, D |
| author_sort | Birkl, C |
| collection | OXFORD |
| description | Lithium ion batteries are promising for small off-grid energy storage applications in developing countries because of their high energy density and long life. However, costs are prohibitive. Instead, we consider “used” Li-ion batteries for this application, finding experimentally that many discarded laptop cells, for example, still have good capacity and cycle life. In order to make safe and optimal use of such cells, we present a modular power management system using a separate power converter for every cell. This novel approach allows individual batteries to be used to their full capacity. The power converters operate in voltage droop control mode to provide easy charge balancing and implement a battery management system to estimate the capacity of each cell, as we demonstrate experimentally. |
| first_indexed | 2024-03-07T02:32:25Z |
| format | Conference item |
| id | oxford-uuid:a7b16cf6-997b-47a2-82dd-497a7f41b959 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:32:25Z |
| publishDate | 2014 |
| publisher | Institute of Electrical and Electronics Engineers |
| record_format | dspace |
| spelling | oxford-uuid:a7b16cf6-997b-47a2-82dd-497a7f41b9592022-03-27T02:56:15ZModular converter system for low-cost off-grid energy storage using second life li-ion batteriesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:a7b16cf6-997b-47a2-82dd-497a7f41b959Symplectic Elements at OxfordInstitute of Electrical and Electronics Engineers2014Birkl, CFrost, DBizeray, ARichardson, RHowey, DLithium ion batteries are promising for small off-grid energy storage applications in developing countries because of their high energy density and long life. However, costs are prohibitive. Instead, we consider “used” Li-ion batteries for this application, finding experimentally that many discarded laptop cells, for example, still have good capacity and cycle life. In order to make safe and optimal use of such cells, we present a modular power management system using a separate power converter for every cell. This novel approach allows individual batteries to be used to their full capacity. The power converters operate in voltage droop control mode to provide easy charge balancing and implement a battery management system to estimate the capacity of each cell, as we demonstrate experimentally. |
| spellingShingle | Birkl, C Frost, D Bizeray, A Richardson, R Howey, D Modular converter system for low-cost off-grid energy storage using second life li-ion batteries |
| title | Modular converter system for low-cost off-grid energy storage using second life li-ion batteries |
| title_full | Modular converter system for low-cost off-grid energy storage using second life li-ion batteries |
| title_fullStr | Modular converter system for low-cost off-grid energy storage using second life li-ion batteries |
| title_full_unstemmed | Modular converter system for low-cost off-grid energy storage using second life li-ion batteries |
| title_short | Modular converter system for low-cost off-grid energy storage using second life li-ion batteries |
| title_sort | modular converter system for low cost off grid energy storage using second life li ion batteries |
| work_keys_str_mv | AT birklc modularconvertersystemforlowcostoffgridenergystorageusingsecondlifeliionbatteries AT frostd modularconvertersystemforlowcostoffgridenergystorageusingsecondlifeliionbatteries AT bizeraya modularconvertersystemforlowcostoffgridenergystorageusingsecondlifeliionbatteries AT richardsonr modularconvertersystemforlowcostoffgridenergystorageusingsecondlifeliionbatteries AT howeyd modularconvertersystemforlowcostoffgridenergystorageusingsecondlifeliionbatteries |