Enclosure

Example

Use in Lemonergy

Make series/parallel architecture explicit.

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.

Cell-to-chassis

Integrating the cells into the vehicle floor itself, so the battery enclosure is the chassis and the cells help carry its loads. It saves mass and height but binds the battery to the car for life.

Gigacasting

Casting a large vehicle structure, such as a whole front or rear underbody, in one piece on an aluminium high-pressure die-casting machine with a locking force of 6,000 tonnes or more. It replaces dozens of stamped and welded parts; in some vehicles a structural battery pack bolts in between the front and rear castings to form the floor.

IP rating

A two-digit code for how well an enclosure keeps out solids and water: the first digit for dust, the second for water. Battery packs are typically IP67, dust-tight and able to survive brief immersion.

Battery pack

The complete battery as installed: modules or cells, the BMS, contactors and fuses, busbars, cooling, sensors and an enclosure. Its energy is the sum of its cells’ energies; its mass and volume are a good deal more.

UL 94

UL’s flammability standard for plastic parts in devices and appliances. In its vertical test a strip is flamed twice for 10 s; V-0, the strictest vertical class, requires burning to stop within 10 s each time, at most 50 s in total over five strips, and no drips that ignite cotton. Cell holders and module covers commonly specify V-0.

Venting

The controlled release of gas and vapour from a cell whose internal pressure has risen too far, through a vent designed to open before the case bursts. The vented gas is flammable and toxic, so packs route it away from occupants.

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. Extended Kalman filtering for battery management systems of LiPB-based HEV battery packs: Part 2. Modeling and identification

   Gregory L. Plett · Journal of Power Sources · 2004

   Topic background · Battery charge balance, open-circuit voltage, ohmic loss, polarization dynamics and model identification; parameters require cell-specific data.

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.