Test Equipment for Low-Conductivity Coolants (LECC/LCC)

Professionally test and handle low-conductivity coolants in electric and hybrid vehicles! As vehicles become increasingly electrified, the demands placed on coolants and thermal management are also rising. In addition to traditional automotive coolants, low-conductivity coolants are used in appropriately designed electric and hybrid vehicles.

These are often referred to as LECC – Low Electrical Conductivity Coolant or LCC – Low Conductivity Coolant.

LECC/LCC are developed for cooling systems in which, in addition to heat transfer, freeze protection, and corrosion protection, a low or defined electrical conductivity of the coolant is also important.

Depending on the vehicle design, these coolants can be used, among other things, in the thermal management of high-voltage batteries, power electronics, inverters, electric motors, or on-board chargers.

These applications typically involve indirect liquid cooling. The coolant flows through cooling plates, cooling channels, pipes, and heat exchangers. The energized battery cells or electrical components are not in direct, continuous contact with the coolant.

Autotestgeräte Leitenberger offers professional measurement and service products for the inspection and safe handling of low-conductivity coolants.

The LWM 01_LR and LWM 02_LR conductivity meters can be used to measure and document the electrical conductivity of suitable coolants. Especially with LECC/LCC systems, electrical conductivity is a key test parameter, as contaminants, mixing with other fluids, or the use of unsuitable refill media can alter the electrical conductivity.

In addition, the PHM 01_LR enables the measurement of the pH value. This allows for the monitoring of another parameter—in addition to electrical conductivity—for assessing the condition of the coolant.

The KVBB 30 is a suitable coolant container available for the clean dispensing and handling of the coolant. With low-conductivity specialty coolants, clean working practices are particularly important, as residues from other coolants, unsuitable water, or other contaminants can alter the properties of the medium.

LECC/LCC must not be equated with a dielectric thermal fluid intended for true immersion or direct cooling. Electrically insulating fluids specifically developed for this purpose are required for continuous direct contact with energized battery or electronic components.

The coolant type, permissible conductivity, pH range, miscibility, and replacement guidelines are always based on the respective vehicle and coolant manufacturer’s specifications.