Calculate Battery Capacities for Different Charge Rates
GeoApp: Battery Capacity Test
Fast charging of batteries reduces the accessible cell capacity. The GeoDict software offers a distinctive capability to simulate this capacity change with varying charge rate.
In GeoDict, you can model and import measured battery or electrode structures with high resolution and run electrochemical charging simulations on the microstructure or upscaled meso structure.
The GeoApp Battery Capacity Test offers a convenient method to compute the accessible cell capacity for different charge rates of a battery or an electrode. A charging protocol consisting of four steps is automatically created: charging with constant current, charging with constant voltage, relaxation, and discharging with constant current.
Simulations are run for different charge rates and well-arranged results allow an easy comparison of the accessible capacities.
This GeoApp allows you to easily compare your charging simulations with experimental data: select the voltage range of the specified battery cell operation window, select the charge rates and the switching conditions from constant current charging to constant voltage charging.
The GeoApp helps you to visualize the charge rate dependent transferred capacities for the charging and discharging step. It also shows you the cell profile over time and the Ragone plot containing the power density and energy density of your battery for each tested charge rate.
Simulate accessible Capacity of a Battery (Example 1)
Charging/discharging simulation of a Li-ion battery.
For each charge rate:
- Charging with constant current from 3.6V to 4.0V
- Charging with constant voltage
- Relaxation to equilibrium
- Discharging with constant current till 3.6V
Simulate accessible Capacity of a Battery (Example 1)
Compare for different charge rates:
(a) Transferred capacity
(b) Overall accessible capacity
(c) Power density over energy density for charging
Simulate accessible Capacity of a Battery (Example 2)
Charging/discharging simulation of a Li-ion battery.
For each charge rate:
- Charging with constant charge rate from 3.4V to 4.2V
- Charging with constant current
- Relaxation to equilibrium
- Discharging with constant charge rate till 3.4V
Simulate accessible Capacity of a Battery (Example 2)
Compare for different charge rates:
(a) Transferred capacity
(b) Overall accessible capacity
(c) Power density over energy density for charging
- Calculate and compare accessible battery/electrode capacities for different user defined charge rates
- Charging profile of 4 steps:
- Step 1: Charging with constant current
- Step 2: Charging with constant voltage
- Step 3: Relaxation to equilibrium
- Step 4: Discharging with constant current
- Select voltage range and switching conditions between the charging steps
- Use the well-arranged plots to compare results for different charge rates
Modules and GeoApps that are often combined with the "Battery Capacity Test" GeoApp:
| Import & Image Processing | ImportGeo-Vol | |||
| Image Analysis | MatDict | PoroDict | ||
| Material Modeling | GrainGeo | GeoApp: Bimodal Anode and Bimodal Cathode | GeoApp: Generate Granular Twin from 2D | GeoApp: Generate Granular Twin from 3D |
| Simulation & Prediction | BatteryDict | ConductoDict | DiffuDict |