Colorized neutron image of a Nissan Leaf battery module.
Neutron image of a Nissan Leaf battery module.
Neutron image of a full-size (5.4″(?)) CD drive.
Development of Solar-Battey Microgrid
The GTL received a grant from the CEC to develop a microgrid at the UC Davis RMI Winery using second-life EV batteries.
RMI Microgrid energy storage system
Panorama from the roof of the Jackson Building (JSWB)
Sorted EV batteries in storage.
Inside the battery container at the microgrid. Before wiring.
Testing a battery bank with a grid-tied inverter.
Sorted EV batteries in storage.
NNissan LEAF batteries assembeled into battery banks in the lab.
Transporting the battery racks to the migrogrid site.
Battery assemblies stored in the lab ready to be transported to the demonstration site.
Moving the battey assemblies to the microgrid site.
Thermal profile testing of battery assembly.
A shipment of batteries arrives in the lab.
Thermal image of a Nissan Leaf battery while charging/discharging
Grid-tied inverters used to test energy storage units.
An xkcd for everything
Got fans? Used for cooling batteries.
Prismatic cells and modules.
Cylindrical cells. These are used in removeable laptop batteries, and in Teslas.
Bus bars for RMI microgrid project. Custom fabricated for us.
Screen capture of the 3D animation rendered with the reconstructed voxel data set. The internal structure can be analyzed by freely rotating the model. Water blockages inside the flow channel can be immediately identified.
Fuel cell flow channel modeling
Neutron image of fuel cell in operation
Fig. 1 Effect of the cross leakage flow on the liquid water distribution in a PEM fuel cell; (a) a colorized neutron image; liquid water distribution in an operating fuel cell (b) a contour plot of the reactant flow velocity in the gas diffusion layer
3D neutron image of a fuel cell.
Another neutron image of a fuel cell.
Next Generation PEM Fuel Cell Design
Custom made cells optimize power output for mobile usage.
Cylindrical fuel cell used in 3D tomography experiment
Unsteady two-phase simulation results using LB binary fluid model simulating two-phase flow through fibrous structure of carbon paper GDL; blue area is the liquid bubble and black colored area indicates solid obstacle (carbon fiber). 1~2: liquid droplet starts to move, driven by the mean flow and hit the porous surface, 3~8: droplet deforms and breaks up into smaller ligaments moving into the porous region, 9~12: detached droplets leave the porous area while the major part of liquid water is trapped and remains in the porous area. ReL = 0.1, Ca = 2.3 × 10-5.
Unsteady liquid water discharging from the gas diffusion layer; the pressure gradient is 6.5 × 105 Pa/m and contact angle is 135 o, time step between each figure is 500 msec.
A custom made bi-polar plate for a PEM fuel cell.
Microscopic pictures of the carbon gas diffusion media; (a) carbon cloth (a white square represents the computational domain and a white dotted circle the region of tow), (b) carbon paper (a white square represents the computational domain)
The fuel cell stacks in the back of the hybrid. This no longer exists.
The lab. We have a car lift by the vehicle dyno..
Our lab’s PV panels, currently unused.
We have a segway, it doesn’t work.
A bunch of prismatic cells that were used in the Aggie House for home-scale energy storage.
A small BMS unit.
Coin cell holder and placement for neutron radiography
The test equipment in the BATTcave.
Prototype self-contained energy storage unit.
A balloned cell caused by application of excessive heat. Do not try this at home.
Close up of a battery bank for the BWF microgrid.
A battery assembly used for the BWF microgrid.
The 12 channel Arbin test station being used to charactarize battery modules
Prismatic and pouch battey cells.
The lab’s office.
The entry to the BATTcave.
An Orion Battery management system, used to prevent fires.
Neutron image of over charged coin cell.
Testing the Picnic Day nangrid setup
Final version of the Picnic Day nanogrid
Prototype version of the Picnic Day nanogrid with parts labeled.
Picnic Day Nangrid setup
For their senior design project, undergraduates Jonathan Kurniawan and Garrett Gomes built a fuel cell range extending EV.