Meaning
This international standard establishes the environmental testing conditions and mechanical load profiles for electrical and electronic equipment installed in road vehicles. In battery system development, ISO 16750-3 is used to evaluate the resistance of battery modules, sensors, and electronic boards to mechanical vibration and shock. Sourcing specialists specify these testing methods in component supply agreements to ensure that parts can withstand the harsh vibrations of vehicle operation.
The standard does not cover climatic or chemical loads, which are addressed in other parts of the ISO 16750 series. Sourcing contracts demand certified test reports as evidence of compliance.
Mechanical Testing
Mechanical stress tests specified in the standard require mounting the battery component to a shaker table and subjecting it to defined vibration profiles. These profiles simulate the random vibrations encountered during driving on rough roads, highways, and unpaved tracks. The test runs for several hours along each of the three orthogonal axes to expose any structural weaknesses, such as loose connections or cracked solder joints.
The standard also requires shock testing, which simulates sudden impacts from potholes or accidents, ensuring the battery pack remains electrically safe. Continuous monitoring of electrical resistance and signal continuity during the test is performed to detect intermittent failures.
Verification Procedure
Sourcing teams evaluate battery component suppliers based on their ability to execute these tests in certified environmental laboratories. The supplier must provide a test plan before testing begins, outlining the fixtures and sensors used to monitor the device under test. Once the vibration and shock cycles are complete, the components undergo a detailed physical inspection and functional check to confirm they operate within specification limits.
No cracks, deformation, or loose electrical contacts must be present on the device. Sourcing professionals review these test results to verify that the components are robust enough for long-term use in electric vehicles.
Procurement Strategy
Procurement contracts for vehicle battery components contain clauses that require re-testing to the standard if any design or material changes are made. This ensures that the mechanical reliability of the battery system is maintained throughout the production lifetime of the vehicle. Sourcing managers use the standard to compare the ruggedness of different sensors and electronic modules from competing suppliers.
Selecting components that are already certified to the standard reduces development risk and shortens the time to market for new battery packs. This procurement strategy protects the manufacturer from expensive product recalls and warranty claims arising from mechanical failures.
