Lithium Iron Phosphate
This is our bread and butter. 80% of our passenger vehicle volume is LFP.
We use this chemistry for vehicles priced under 200,000 RMB. Cost per kWh at pack level is currently around 680 RMB for large orders. Smaller orders are higher.
Nickel Cobalt Manganese
For customers who need higher energy density. We offer NCM523, NCM622, and NCM811 configurations.
We typically recommend NCM for vehicles with range targets above 500km or premium positioning where pack weight matters.
Cell-to-pack eliminates traditional modules. We've been doing CTP since 2020. Current generation achieves 66% volume utilization.
Cell-to-chassis is newer for us. We have two production contracts signed, first deliveries scheduled for Q2 next year. Integration with body structure reduces total weight by about 8% compared to CTP.
Standard configurations: 400V and 800V systems.
400V is still the majority of our orders. 800V adoption is growing fast though. Last year 800V was 12% of new contracts. This year it's closer to 30%.
We can do custom voltage ranges for specific platforms. Minimum order quantity applies.
Liquid cooling is standard on all our passenger vehicle packs. Coolant channels run between cell rows. We design for inlet temperature up to 40°C ambient with maximum cell temperature delta under 5°C across the pack.
For LFP packs in mild climates, some customers opt for our simplified cooling system to save cost. We don't recommend this for NCM.
Heating is integrated for cold climate variants. PTC heaters bring cells to operating temperature in about 15 minutes at -20°C. We had a customer in Harbin test our packs for two winters before signing. They were paranoid about cold performance. Understandable.
All packs pass GB 38031-2020 requirements. That covers overcharge, over-discharge, external short circuit, drop, immersion, thermal shock, the full list.
For export customers we also certify to UN38.3 and relevant regional standards. ECE R100 for Europe. FMVSS for US market.
We do nail penetration testing on cells even though it's not required anymore. Old habit. Two of our engineers came from a company that had a field recall in 2019. They're particular about this.
Pack-level field failure rate for 2023 was 0.038%. Majority of those were BMS communication faults, not cell failures.
We track every pack through its lifecycle. Serial number links to full production records, test data, and any warranty claims.
We keep safety stock of common cell formats. Custom configurations take longer.
Initial feasibility review takes about 2 weeks. We'll come back with preliminary specs, rough pricing, and any concerns about the packaging space or timeline.
If the numbers work for both sides, we sign an NDA and development agreement.
Detailed design phase. Our application engineers work with your team on mounting points, cooling connections, HV/LV interfaces, BMS integration.
We build A-sample packs for your validation testing. Usually 5-10 units depending on test plan.
B-sample and C-sample builds incorporate design updates from A-sample testing. PPAP documentation prepared in parallel.
Tooling investment happens here. Customer typically funds tooling. We offer amortization options for high volume programs.
Production ramp. We start at reduced line speed for the first 2-3 months. Quality team is on-site at customer plant during launch support period.
We don't do small batch custom work anymore. Minimum program commitment is 5,000 packs annually. For lower volumes we can refer you to some smaller suppliers we've worked with before. If you need prismatic cells only without pack integration, minimum order is one container, roughly 2,000 cells depending on format. Contact our sales team in Hefei for cell-only inquiries.