The WeLion SHE350-106Ah solid state battery cell is very close in specifications to that used in the 150kWh NIO ES6. The cell is made by Beijing WeLion New Energy Technology Co. Ltd and at ~360Wh/kg is at the leading edge of current 2023 production battery cells.
This cell has a slightly lower energy density at 347Wh/kg.
Key Features
- Energy Density
- 347.5 Wh/kg
- 746.5 Wh/L
- Power Density
- 2019.9 W10s/kg
- 114.4 Wcont/kg
- 4339.3 W10s/L
This post has been built based on the support and sponsorship from: Eatron Technologies, About:Energy, AVANT Future Mobility, Quarto Technical Services, TAE Power Solutions and The Limiting Factor.
- Cell Model = PL119118359-106Ah
- Nominal Capacity = 106 Ah at C/3
- 102Ah at 1C
- Nominal Voltage = 3.55 V at C/3
- Maximum voltage = 4.25 V
- Minimum voltage = 2.5 V
- Nominal Energy = 376.3 Wh
- Weight = 1.083 kg
- Format = Pouch
- Chemistry = Semi-solid state
- Resistance
- DCIR 10s = 0.0012 Ω 10s @25°C 50%SoC
- Conductance = 833 Siemens
- Conductance/Unit energy = 2.215 Siemens/Wh
- ACIR = 0.0008 Ω @1kHz
- DCIR 10s = 0.0012 Ω 10s @25°C 50%SoC
- Dimensions
- A: Thickness = 11.3mm (@15% SoC) and 11.9mm (@100% SoC), B: Height = 118mm, C: Length = 359mm
- Volume = 0.5041078 Litres
- Discharge
- Continuous current = 35.3A
- Peak power = 2187.5 W10s
- Continuous power = 123.9 W
- Temperature range = 55 Max °C to -20 Min °C
We see a cell that is good with respect to gravimetric density, but not so great with respect to volumetric density.
In the specification sheet the cell is described as solid state with a “solid-liquid hybrid electrolyte”. Hence this is described as Semi-Solid State.
Cycling
- C/3 charge to 4.25V then C/20
- 0.5C charge and 1C discharge in SoC range 95% to 5%
- C/3 discharge to 2.5V
- starting at 20kPa clamping pressure on cell surface
- at 25°C
- >500 cycles at 90% SoH
- 1000 cycles at 80% SoH
Cell Database
This WeLion cell along with other cells from their catalogue are included within our cell database. This simple excel file allows you to compare cells based on a number of parameters.
Safety data
The specification sheet does not specify the origin of the safety tests. Therefore, we would assume these were done by WeLion and hence should be taken as only an indicator.
| Test | Result | Comments |
|---|---|---|
| External Short Circuit | No Fire, No Explosion | 100% SoC, <5mΩ for 10 minutes |
| Overcharge | No Fire, No Explosion | 1C charge to 130% SoC |
| Forced Discharge | No Fire, No Explosion | 1C discharge for 90 minutes |
| Crush | No Fire, No Explosion | 75mm half cylinder, perpendicular to the cell, 2mm/s speed and until 30% deformation or 200kN force. |
| Shock | No Effect, no loss of function | GB 38031-2020 |
| Vibration | No Effect, no loss of function | GB 38031-2020 |
| Temperature Cycling | No Effect, no loss of function | 8 hours at each temperature and 30 minutes movement time -40°C and 85°C, repeated 5 times. |
| Low Pressure | No fire, no explosion | GB 38031-2020 |
| Nail Penetration | No Fire, No Explosion | 1mm diameter, 30° tip and penetrating the surface of the cell in the centre to a depth of 1.19mm. |
| Hot Box | No Fire, No Explosion | 130°C to 160°C in 5°C steps and 1 hour at each temperature. |
Manufacturing
The WeLion patents [1] are an interesting read. However, at this point we don’t know which of these are speculative and which are protection for processes used in the production of this cell.
Patent: 20230216084 The positive plate for a lithium battery comprises a current collector and an active material layer arranged on a surface of the current collector; and the active material layer comprises a positive electrode active material, a conductive agent, a binder, an oxide solid-state electrolyte and a polymer obtained by in-situ polymerization.
Patent: 20230216087 The present application provides an in-situ polymerized solid-state battery with a multilayer electrolyte, which comprises an oxidation-resistant polymer layer, which is formed in-situ on the positive electrode, and also comprises a reduction-resistant polymer layer, which is formed in-situ on the negative electrode. The oxidation-resistant polymer through chemical reaction is preset on the positive electrode during the mixing process. And a monomer or initiator that can form reduction-resistant polymer through chemical reaction is preset on the negative electrode plate during the mixing process.