Heat management device of vehicle

The thermal management device efficiently heats the battery and dehumidifies the vehicle interior by controlling the electric heater's current based on temperature, addressing power and pressure issues in existing systems.

JP2025006249APending Publication Date: 2025-01-17TOYOTA JIDOSHA KK
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Patent Information

Application Number
JP2023106920
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-06-29
Publication Date
2025-01-17

AI Technical Summary

Technical Problem

Existing thermal management systems struggle to efficiently heat the battery while dehumidifying and heating the vehicle interior, leading to potential overconsumption of power and excessive pressure in the refrigeration cycle.

Method used

A thermal management device with a refrigeration cycle, high and low temperature circuits, and a control device that adjusts the current to the electric heater based on the temperature of the high-temperature heat medium, allowing for efficient heat exchange in the condenser and electric heater to raise the battery temperature during dehumidification and heating.

Benefits of technology

The system effectively heats the battery and dehumidifies the interior by controlling the electric heater's current, preventing excessive power consumption and refrigerant pressure, ensuring efficient heat transfer and balanced operation.

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Abstract

To appropriately heat a high temperature side heat medium by heat radiation (heat exchange) in a capacitor in a refrigeration cycle and an electric heater, when a temperature of a battery is raised during execution of dehumidification heating.SOLUTION: When request for raising temperature of a battery 200 exists during dehumidification heating of an air conditioner 2, heat is transmitted to a low temperature radiator 170 of a low temperature side circuit 120 from a high temperature radiator 118 of a high temperature side circuit 110, and the temperature of the battery 200 is raised. When a temperature THW of the high temperature side heat medium detected by a temperature sensor 12 is higher than a predetermined value α, an energization amount of an electric heater 112 is reduced, when the temperature THW is lower than a predetermined value β(<α), the energization amount of the electric heater 112 is increased.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Heat management device

    JP2021156234A