Grounding chasis in the electric vehicle

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SUMMARY

Grounding both the 12V low voltage system and the 144V high voltage system to a common ground in an electric vehicle can lead to significant electrical issues. If the ground is genuine, both systems will be effectively grounded; however, if it is not, the common ground rail will serve merely as a reference voltage for both systems. The outcome heavily relies on the specific wiring configuration of the vehicle, and creating a circuit diagram can clarify potential issues.

PREREQUISITES
  • Understanding of electrical grounding principles
  • Familiarity with low voltage (12V) and high voltage (144V) systems in electric vehicles
  • Basic knowledge of circuit diagram creation
  • Experience with automotive electrical systems
NEXT STEPS
  • Research the implications of grounding in hybrid and electric vehicle systems
  • Learn about circuit diagramming tools for automotive applications
  • Investigate the effects of improper grounding on vehicle electronics
  • Explore best practices for wiring high voltage systems in electric vehicles
USEFUL FOR

Electrical engineers, automotive technicians, and anyone involved in the design or maintenance of electric vehicle systems.

nikita
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what will happen if I ground my 12v(low voltage system) and 144v(high voltage system) to a common ground?
 
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If it is a genuine ground - then they will both be grounded.
If not then the common "ground" rail acts as a reference voltage for both low and high voltage systems.
A lot will depend on how your car is wired though. You can probably sketch out the resulting circuit diagram.
 

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