MVM for EV battery inspection

Inspect EVERY battery tray, assembly, case and frame at a fraction of the cost.

Measures all points of inspection on an electric vehicle battery tray, assembly or framework with CMM level of accuracy at the speed of production.

  • Current technology only inspects 1/10 or even 1/50 battery trays for electric vehicles. One MVM system can inspect and measure 700 points of inspection in less than 100 seconds on up to 150,000 EV batteries per year
  • Measures and returns values for up to 1400 points of inspection
  • 100x faster than CMM and 10x times faster than LiDAR.
  • Up to 0.2mm correlation with CMM at 99.2% accuracy.
  • Capable of measuring many different features including ovals, slot holes and other irregular shapes, recessed holes, diameter of a hole, mounting point, or bolt.
  • A fraction of the cost of LiDAR
  • 3 week set up time. 1 week for redesigns
  • Maintenance: 5 minutes every 90 days

The MVM system involves three stations:

  • Loading and unloading station.
  • The MVM measurement system, which is a matrix of 50 to 100 cameras for high speed precision measurement of the battery assembly/ tray/ frame.
  • A second 3D inspection station for capturing difficult points of inspection that are on planes angled outside of the MVM matrix camera viewing range.
  • To enable the fastest, most accurate measurements possible, the design team uses Speedbot MVM Simulator to ensure that each point of inspection is covered by three or more 2D cameras.
  • The MVM system takes into account factors which impact the coverage of each of the features such as field of view, occlusion, limitations due to camera focal length, image distortion, to ensure there are sufficient cameras covering each measurement point to get to the required level of measurement precision.

Speedbot Workflow

1. Loading

A loading arm places the battery tray on to the positioning platform and once the tray is in place a switch triggers the clamping mechanism to lock the battery tray in place. The tray then moves into the MVM system which is holds 50 -100 2D cameras.

2. First Inspection: MVM Matrix

The battery tray is moved into the MVM inspection system and the safety door to the dark room closes at which point the 2D vision camera matrix begins to collect image data for calculating size, position, missing features and other attributes are required by the company. This process is complete in 50 seconds.

3. Second inspection: Complex feature

While the system is processing the data from the MVM matrix, the battery tray slides out and a 3D camera then moves across the battery tray to capture features that are on the edge of the battery frame as well as flatness and profile of the battery tray for a higher degree of accuracy. The standard CMM sample points for flatness and profile are 4-6 points. Speedbot MVM takes 40-60 sample points but is capable of taking up 1,000 sample points with less than one minute increase in cycle time if needed.

Speedbot MVM Use Case: In-line Inspection of Electric Vehicle Battery Assembly

Examples of features measured/ inspected

  • Features on an angled or vertical plane
  • Recessed and raised features
  • Flatness
  • Holes

  • Welds

  • Anode tabs
MVM systems have been successfully inspecting battery assemblies on 15 lines at 7 of the largest automotive companies since 2020 with only 0.01h of unplanned downtime a month and minimal maintenance requirements.