TechnicianVision · Knowledge base
Jump Starting And Charging Vehicles With Battery Management Systems
I-CAR · April 30, 2020
Summary
This article explains that vehicles equipped with a Battery Management System (BMS) require specific procedures for jump starting and charging to prevent damage to the battery and electrical components. Because the BMS monitors all energy entering and exiting the battery via a sensor on the negative terminal, technicians must follow vehicle-specific instructions regarding charger types and connection points.
What to do on the job
Always refer to the vehicle-specific service manual or owner's manual for correct charging connection points and charger types, ensuring you do not connect directly to the negative battery terminal if a BMS sensor is present.
How to use it
Use this document to justify the necessary labor time and equipment requirements for proper battery maintenance during repairs. It supports the need to research OEM-specific battery charging and jump-starting procedures rather than using traditional, direct-to-terminal charging methods, which can damage sensitive BMS sensors and electrical systems.
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