Get Air conditioning and thermal management -> Coolant circuit for high-voltage battery Guide for Audi RS E Tron Gt 4 Door First Generation (2021-2026)

Coolant circuit for high-voltage battery

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The coolant circuit for high-voltage battery incorporates the following components:

Coolant pump for high-voltage battery V590, coolant temperature sender 1 for high-voltage battery G898, high-voltage battery 1

AX2, coolant temperature sender 2 for high-voltage battery G899, changeover and mixing valve 4 for thermal management V653,

charging unit 1 for high-voltage battery AX4, restrictor 10, changeover and mixing valve 7 for thermal management V656, coolant

temperature sender 8 for thermal management G968, heat exchanger for high-voltage battery (chiller) A, coolant temperature

sender 1 for thermal management G902 and a non-return valve 9.

Temperatures of approx. 30 °C may occur during operation.

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Example: Circulating coolant around high-voltage battery 1 AX2

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Coolant pump for high-voltage battery V590 transports the coolant through high-voltage battery 1 AX2 to changeover and mixing

valve 4 for thermal management V653. The coolant returns to coolant pump for high-voltage battery V590 from changeover and

mixing valve 4 for thermal management. The refrigerant circuit for cooling high-voltage battery 1 AX2 is not active as part of this.

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Example: Actively cooling high-voltage battery 1 AX2

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Coolant pump for high-voltage battery V590 transports the coolant through high-voltage battery 1 AX2, changeover and mixing

valve 4 for thermal management V653, changeover and mixing valve 7 for thermal management V656, the heat exchanger for

high-voltage battery A and changeover and mixing valve 4 for thermal management V653.

The activated refrigerant circuit for cooling high-voltage battery 1 AX2 branches off after the internal heat exchanger 4 towards

refrigerant expansion valve 2 N637 and heat exchanger for high-voltage battery A. As it vaporises, the refrigerant absorbs the heat

from the coolant circuit for the high-voltage battery in the heat exchanger for high-voltage battery. From there, the refrigerant

flows on and back into the refrigerant circuit for climate control in the vehicle interior before the internal heat exchanger where it

can release its heat energy into the atmosphere in the condenser 1.

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Example: Heating high-voltage battery 1 AX2

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Coolant pump for high-voltage battery V590 transports the coolant through high-voltage battery 1 AX2, changeover and mixing

valve 4 for thermal management V653, changeover and mixing valve 7 for thermal management V656, the heat exchanger for

high-voltage battery A and changeover and mixing valve 4 for thermal management V653 before returning to coolant pump V590.

A regulated portion of the coolant flow can be transported into the heating circuit downstream of changeover and mixing valve 4

for thermal management V653 and the non-return valve 9. It flows into high-voltage heater (linear) Z189 and is heated there. The

coolant then passes through the heat exchanger for interior heating 6 and the heat condenser B. Thermal management coolant

pump 2 V618 pumps the coolant through coolant changeover valve 1 N632 into the coolant circuit for electric powertrain. The

heated coolant flows back into the coolant circuit for the high-voltage battery via coolant changeover valve 2 N633.

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Air conditioning and thermal management -> Coolant circuit for high-voltage battery for Your Audi RS E Tron Gt 4 Door First Generation (2021-2026)