A breakdown of rechargeable Li-ion batteries for medical devices
HIMAX provides a refined and optimized breakdown of rechargeable Li-ion batteries for medical devices, focusing on safety, performance, and compliance with medical standards:
1.Best Li-ion Battery Types for Medical Devices
| Medical Device | Recommended Battery | Key Specifications |
| Portable Patient Monitor | High-capacity 18650/21700 Li-ion (3.7V, 2500–4000mAh) | Long runtime, low self-discharge |
| AED (Defibrillator) | LiFePO₄ (Lithium Iron Phosphate) or LiMnO₂ (3.2V–3.7V) | High pulse current, wide temp range (-20°C to 60°C) |
| Infusion Pump | Custom LiPo (Lithium Polymer) (3.7V, 1000–3000mAh) | Lightweight, slim form factor |
| Portable Ventilator | Multi-cell Li-ion Pack (24V/48V, ≥100Wh) | High energy density, fast charging |
| Portable Ultrasound | High-power 21700 Li-ion (3.7V, 4000–5000mAh) | Stable voltage, EMI shielding |
| Wearable Glucose Monitor | Solid-state/Thin-film Li-ion (≤100mAh) | Ultra-compact, flexible |
| Surgical Power Tools | High-discharge 18650 (10A+) or LiPo (3.7V, 2000–3500mAh) | High torque support, sterilization-compatible |
2. Critical Requirements for Medical Li-ion Batteries
- Safety:Flame-retardant casing, built-in BMS (overcharge/over-discharge protection).
- Reliability:≥500 cycles (80% capacity retention), low self-discharge (<3%/month).
- Compliance:Must meet IEC 60601-1 (medical electrical safety) and 3 (transport).
- Temperature Range:-20°C to 60°C for emergency devices (AEDs/ventilators).
3. Battery Chemistries Compared
| Chemistry | Best For | Advantages | Limitations |
| LiFePO₄ | AEDs, ventilators | Ultra-safe, long lifespan (>2000 cycles) | Lower energy density (~120Wh/kg) |
| NMC (LiNiMnCoO₂) | Patient monitors, surgical tools | High energy density (~250Wh/kg) | Requires robust BMS |
| LiPo | Infusion pumps, wearables | Flexible, lightweight | Lower cycle life (~300 cycles) |
| LiMnO₂ | AEDs (non-rechargeable primary cells) | High pulse power | Not rechargeab |
4. Design Considerations
- Replaceability:Hospitals prefer standardized, swappable packs (e.g., 18650).
- Sterilization:Batteries in surgical tools must withstand autoclaving/EtO gas.
- EMI/RFI Shielding:Critical for ultrasound/patient monitors to avoid interference.
5. Compliance Checklist
- IEC 60601-1 (Medical electrical equipment safety)
- IEC 62133(Safety of rechargeable cells)
- 3(Air transport certification)
- ISO 13485(Medical device manufacturing QMS)
6. Need Specific Recommendations?
If you’re designing or sourcing batteries for a specific device, provide:
- Voltage & Capacity requirements
- Size constraints(e.g., space for 18650 vs. LiPo)
- Sterilization needs(if applicable)
Our ISO-certified manufacturing facilities, cutting-edge R&D team, and vertically integrated supply chain allow us to deliver superior quality, safety, and cost-efficiency to global clients.
1.We specialize in:
✔ Lithium-Ion (Li-ion) Packs – High energy density for portable electronics.
✔ LiFePO4 Packs – Long lifespan & safety for energy storage and industrial use.
✔ Custom Battery Solutions – Tailored voltage, capacity, and form factor.
2. Competitive Advantages
✔ 12 Years of Expertise – Proven track record in battery innovation.
✔ Vertical Integration – Control over raw materials (cells, BMS, casing).
✔ Cost-Effective Production – Economies of scale with in-house manufacturing.
✔ Fast Prototyping – 30% quicker turnaround than competitors.
✔ Global Supply Chain – Partnerships with top material suppliers.
