PMBus

Example

Use in Lemonergy

Separate quantities from encoding and transport.

This is a reference concept. No executable Lemonergy block has been verified for this term.

Connected concepts

Related concepts from the knowledge graph. Connections show context, not cause and effect. Hover or focus a linked term for its definition.

Charger

The power electronics that convert mains or DC supply into the controlled current and voltage a battery needs. For lithium-ion it runs the CC-CV profile within the limits the BMS communicates, and stops rather than floats when the cell is full.

I²C

A two-wire serial bus — one clock line and one data line, both pulled up — on which a controller addresses many small chips at 100 kbit/s, 400 kbit/s or faster. Inside a battery pack it links the fuel gauge, protection chip, memory and temperature sensors; SMBus is derived from it with tighter timing rules.

Power-path management

Circuitry that routes power between an external supply, the battery and the system load, so the device runs from the supply while the battery charges, draws on the battery when the supply sags or fails, and adds battery current during peaks. An ideal-diode switch — a MOSFET driven to behave as a near-lossless diode — makes the changeover seamless.

SMBus

The two-wire bus, derived from I²C, over which a laptop or tool battery reports its charge, health and limits to the host and charger. The Smart Battery Data specification defines the register set, so any compliant charger can read it.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. 3rd generation of the CAN data link layer

   CAN in Automation, CAN Newsletter · 2020

   Topic background · Classical CAN, CAN FD and CAN XL data-link concepts; publication describes the 2020 state.

2. Getting Started with the BQ76925

   Texas Instruments · 2019

   Topic background · A concrete BMS analog front-end example: cell voltage, current, temperature measurement and MCU integration.