Fundamentos de Baterías de Litio

Lithium-ion traction batteries power the majority of industrial AGV and AMR fleets because they deliver high energy density, flat discharge voltage, and acceptable cycle life at warehouse duty cycles. A pack is not a single cell: it is a structured assembly of prismatic, cylindrical, or pouch cells wired in series and parallel to meet voltage and amp-hour targets while fitting under-vehicle envelope constraints.

SiCore wireless charging systems interact with the pack at the BMS boundary — not directly with individual cells. Understanding pack topology, nominal voltage, and charge acceptance limits is prerequisite to sizing receivers, inverters, and fleet energy budgets.

01Pack hierarchy

• Cell: smallest electrochemical unit — typically 3.2 V (LFP) or 3.6–3.7 V (NMC/NCA) nominal per cell.
• Module: grouped cells with inter-cell connections, sensing taps, and often module-level fusing.
• Pack: complete traction assembly with BMS, contactors, HV harness, thermal interface, and enclosure.
• Auxiliary circuits: 12/24 V logic supply, pre-charge, isolation monitoring, and service disconnect.

02Key electrical parameters

Nominal pack voltage sets inverter output requirements and receiver rectifier design — a 48 V AMR pack and a 360 V fork AGV pack demand different wireless power architectures. Usable energy (kWh) depends on depth-of-discharge policy: industrial fleets rarely discharge below 10–20% SOC to protect cycle life and preserve emergency maneuver margin.

C-rate defines charge and discharge current relative to capacity: a 100 Ah pack at 1C accepts 100 A. Wireless dock windows are short, so charge C-rates during opportunity charging often exceed 0.5C — the pack and thermal system must tolerate repeated partial fast charge events.

03Integration with wireless charging

Wireless receivers deliver rectified DC to the pack through the same charge path as wired chargers — typically via the BMS-controlled contactor and onboard charger or direct DC fast-charge port. SiCore systems coordinate charge current requests with BMS CAN signals so the pack never receives power when isolation, temperature, or cell voltage limits are violated.