US 2026/0307491 A1 · DETECTION AND REMEDIATION OF LIQUID INTRUSION IN VEHICLE BATTERY PACKS

Abstract

A system includes a battery pack, a sensor configured to sense a midpack voltage of the battery pack, and a control module. The control module is configured to determine an isolation resistance of the battery pack based on the midpack voltage, monitor characteristics associated with the battery pack and indicative of liquid intrusion inside the battery pack, set one or more flags based on the monitored characteristics, identify a severity level of a plurality of severity levels for liquid intrusion inside the battery pack based on which one or more of the characteristics caused the one or more flags to be set, and select at least one remedial action of a plurality of remedial actions in response to the identified severity level for remediating liquid intrusion inside the battery pack. Other example systems and methods are also disclosed.

Claims20

Dependent claims

A system for detecting and remediating liquid intrusion inside a battery pack of a vehicle, the system comprising:

a battery pack including a plurality of battery cells;
a sensor configured to sense a midpack voltage of the battery pack;
and
a control module in communication with the one or more sensors, the control module configured to:
determine an isolation resistance of the battery pack based on the midpack voltage;
monitor characteristics associated with the battery pack and indicative of liquid intrusion inside the battery pack, the characteristics including a current value of the isolation resistance, a behavior of the midpack voltage over time, and a behavior of the isolation resistance over time;
set one or more flags based on the monitored characteristics;
identify a severity level of a plurality of severity levels for liquid intrusion inside the battery pack based on which one or more of the characteristics caused the one or more flags to be set;
and
select at least one remedial action of a plurality of remedial actions in response to the identified severity level for remediating liquid intrusion inside the battery pack.

7 more elements

A method for detecting and remediating liquid intrusion inside a battery pack of a vehicle, the method comprising:

receiving, from a voltage sensor, a midpack voltage of the battery pack;
determining an isolation resistance of the battery pack based on the midpack voltage;
monitoring characteristics associated with the battery pack and indicative of liquid intrusion inside the battery pack, the characteristics including a current value of the isolation resistance, a behavior of the midpack voltage over time, and a behavior of the isolation resistance over time;
setting one or more flags based on the monitored characteristics;
identifying a severity level of a plurality of severity levels for liquid intrusion inside the battery pack based on which one or more of the characteristics caused the one or more flags to be set;
and
selecting at least one remedial action of a plurality of remedial actions in response to the identified severity level for remediating liquid intrusion inside the battery pack.

4 more elements

Dependencies are inferred from the claim text.

Detection and remediation of liquid intrusion in vehicle battery packs

Life of this patent

Detection and remediation of liquid intrusion in vehicle battery packs

Life of this patent

Abstract

Claims20