Cooling apparatus for electric modules of hybrid electric vehicle or electric vehicle

Abstract

The present invention provides an apparatus for effectively cooling electric modules such as an inverter and an LDC installed in a hybrid electric vehicle or an electric vehicle. The cooling apparatus for electric modules of a hybrid electric vehicle or an electric vehicle secures a uniform cooling efficiency and achieves an excellent heat radiating efficiency at the same time by realizing a new type of cooling system adapted to separately manage heat transfer in the cooling water passages of first and second electric modules by separating an upper passage of the first electric module and a lower passage of the second electric module using a cooling separator, thereby ensuring to obtain uniform cooling efficiency and excellent heat radiation efficiency.

Description

technical field [0001] The present disclosure relates to an apparatus for efficient cooling of electrical modules such as inverters and low voltage DC-DC converters (LDCs) in hybrid electric vehicles or electric vehicles. Background technique [0002] Generally, a hybrid electric vehicle or an electric vehicle has a high-voltage battery adapted to supply driving power to an electric motor, and in this case, the high-voltage battery is repeatedly charged and discharged to provide required electric power during running of the vehicle. [0003] This high-voltage battery-related system is designed as an integrated structure in which several products are assembled into one unit, and the battery-related system is installed under rear seats or in a trunk space inside a vehicle. A high-voltage battery-related system typically includes: a battery, a low-voltage DC-DC converter (LDC), a motor control unit (MCU), and an inverter. [0004] For example, a hybrid electric vehicle or elec...

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Problems solved by technology

[0007] However, since the first electrical module and the second electrical module share the cooling water and the only channel, the cooling equipment needs a bypass structure to prevent the cooling efficiency of the first electrical module from decreasing when the pressure drop is too large

Moreover, the increased heat of the first and second electrical modules increases the temperature of the cooling water, which reduces the efficiency of heat dissipation

That is to say, when the first electric module and the second electric module share the cooling water, and when their thermal energy is transferred to the cooling water at the same time, the temperature of the cooling water rises to the maximum limit or higher, reducing the cooling efficiency

In addition, since the channels of the radiant heat of the first and second electric modules are not independent, the degree of freedom of design is also reduced

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