IEC 60112

Example

Use in Lemonergy

Match scope to product and installation.

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.

Busbar

A rigid copper or aluminium conductor that joins cell terminals into series and parallel groups, and modules into the pack. Its cross-section is sized for current and heating, and its joints — welded or bolted — are a classic source of resistance and failure.

Cell supervision circuit

The board on each module that measures its cell voltages and temperatures and switches its balancing resistors, reporting to the central BMS controller. It is usually built around a dedicated monitoring chip and linked by isoSPI or CAN.

Comparative tracking index

The highest voltage at which an insulating material survives 50 drops of a conductive ammonium chloride solution without forming a carbonised track, tested to IEC 60112. Materials fall in groups from I (CTI ≥ 600) to IIIb (100–175); a better group permits shorter creepage distances, which matters for compact 800 V busbar holders and circuit boards.

Creepage distance

The shortest path between two conductors measured along the surface of the insulation between them. Moisture and dirt on that surface can carry leakage current and tracking, so the required distance grows with working voltage, pollution and a poorer tracking index: at 400 V and pollution degree 2, basic insulation needs about 2 mm on a group I material but 4 mm on group III.

Insulation resistance

The resistance between the high-voltage circuit and the vehicle chassis, which must stay above about 100 Ω per volt of pack voltage so a person touching the chassis is safe. An insulation monitoring device measures it continuously.

Insulation resistance test

Applying a high DC or AC voltage between the high-voltage circuit and the chassis or housing to verify that insulation holds, with the leakage current below a limit. It is done on every pack at end of line and after abuse tests in R100.

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. IEC 62619:2022 — Safety requirements for secondary lithium cells and batteries, for use in industrial applications

   International Electrotechnical Commission · 2022

   Topic background · Industrial and stationary lithium-battery safety scope; excludes road vehicles where their dedicated standard applies.

2. Energy Storage System Testing and Certification

   UL Solutions

   Topic background · System safety scope of UL 9540 and relationships to battery and power-conversion standards.