Vehicle Battery Charging Control Method for Cold, High SOC Conditions

ChangeBridge: Patent Apps - Power Supply (H02J)

Detected March 26th, 2026

Summary

The USPTO has published a new patent application detailing a method for controlling vehicle battery charging under cold and high state-of-charge conditions. The invention aims to optimize charging by managing thermal conditioning and charge current requests to prevent premature transitions in the charging phases.

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What changed

This document is a patent application (US20260084566A1) filed by the USPTO, describing a novel method for controlling the charging of electrified vehicle batteries, particularly under challenging conditions such as low ambient temperatures and high state-of-charge (SOC).

The method involves actively managing the battery's thermal conditioning system and adjusting the charge current request to the EVSE to prevent abrupt power-offs from causing the charge current to exceed battery limits. This prevents a premature shift from bulk charging to trickle charging, ensuring more efficient and potentially safer charging cycles. The application was filed on September 24, 2024.

Source document (simplified)

← USPTO Patent Applications

TECHNIQUES FOR CONTROLLING VEHICLE BATTERY CHARGING CURRENT TO ACCURATELY ARRIVE AT CHARGE COMPLETION CONDITION DURING HIGH SOC AND COLD AMBIENT CONDITIONS

Application US20260084566A1 Kind: A1 Mar 26, 2026

Inventors

Venkatasubramanian Sankara Raman, Rudolf Kharpuri

Abstract

A charging control method for an electrified vehicle includes in response to a low ambient temperature and state of charge (SOC) condition of a high voltage battery system, controlling a thermal conditioning device to thermally condition the battery system, controlling a charge current request for electrified vehicle supply equipment (EVSE) based on a load of the thermal conditioning device, detecting a spike condition where an abrupt power-off of the thermal conditioning device causes the charge current request to the EVSE to exceed limits for the battery system and, in response to detecting the spike condition, temporarily decreasing the charge current request to the EVSE to prevent a premature transition from a bulk charging phase to a trickle charging phase of the battery system.