Advanced graphene-based Hall Effect sensor ideal for local current density analysis and mapping of battery cells such as those found in  electric vehicles.

GHS10AT icon

The graphene GHS01AT Hall Effect sensor is optimised for use in relatively low field environments and normal ambient temperatures.

Bringing the magnetic field measurement resolution towards that of more complex magnetic sensors, yet with the small size and ease of use of a Hall sensor, the GHS01AT can address monitoring tasks which conventional technologies simply cannot provide an effective solution for.

The new GHS01AT Hall Effect sensors are ideally suited to the battery market. Here they will be of great value in battery cell analysis when investigating the validity of different battery cell chemistry derivatives and form factors under development. Using these magnetic sensors, it will be possible to get a more detailed and localised (point-to-point) understanding of battery cell behaviour.

By utilising a graphene monolayer (just 0.34nm thick) the GHS01AT is not affected by the presence of in-plane stray electromagnetic fields that would severely impact on the accuracy of alternative sensing mechanisms. The small footprint allows good spatial resolution.

The method is an indirect means for measuring real-time magnetic field (produced by current flowing through the cell) data, so one of the advantages is that the battery cell itself and the tabs/busbars feeding into the cells are not disrupted during testing.

The method is technology agnostic – use for liquid electrolyte or solid state batteries, different chemistries, pouch and cylindrical cells.

These measurements can be facilitated by the GHS Array Starter Kit.

The standard GHS01AT Kit includes a GHS01AT sensor and a small interface PCB for ease and convenience of implementation.

Battery cell insights include:

  • Real time current density mapping – observe localised variations across the cell, over time, and during charge/discharge
  • Failure mode analysis – correlate hot spots to local changes in current density
  • Simultaneous monitoring – observe current flowing into individual cells within a multi-cell pack
  • Quality control – detect manufacturing defects non-destructively
  • Recycling/reuse – Screening battery cells for reuse and repurposing

Paragraf also produce a kit for simultaneous data collection from up to 8 GHS sensors (GHS09CC or GHS01AT) – the
GHS Array Starter Kit

GHS Array Kit icon

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Hall-Effect Sensors discussed in the Knowledge Centre and News