Electric vehicle thermal management system with series and parallel structure
First Claim
1. An electric vehicle thermal management system for heating a passenger cabin of an electric vehicle by means of heat absorbed from at least a battery and an electric motor of the electric vehicle, comprising:
- a battery temperature sensor configured to detect a battery temperature of the battery;
a first radiator;
a cooling circuit for circulating cooling liquid, such that the cooling liquid in the cooling circuit cools at least one of the battery and the electric motor by absorbing heat from the at least one of the battery and the electric motor;
one or more switching devices configured to switch the cooling circuit to different configurations such thatin a first configuration, the electric motor, the battery and the first radiator are fluidly connected in series through the cooling circuit such that the first radiator dissipates heat absorbed from the battery and the electric motor into the vehicle; and
in a second configuration, the battery and radiator, but not the electric motor, are fluidly connected in series through the cooling circuit such that the first radiator dissipates heat absorbed from the battery but not from the electric motor into the vehicle; and
a controller configured toeffectuate the cooling circuit being configured from the first configuration to the second configuration via the one or more switching devices in response to the battery sensor detecting the battery temperature is above a first threshold temperature.
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Accused Products
Abstract
Electric vehicle thermal management systems and electric vehicles using the thermal management system, are disclosed. A passenger cabin is heated by the heat dissipated from a battery and/or a motor. A cooling circuit in the management system fluidly connects the battery, the motor and a first radiator in series. The first radiator provides a heat source to the passenger cabin by means of the heat dissipated from the battery and/or the electric motor. Under certain conditions, the electric motor is selectively separated from the cooling circuit, so that when the passenger cabin needs to be heated, the thermal management system can provide heat to the passenger cabin without affecting the heat dissipation of the battery.
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Citations
17 Claims
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1. An electric vehicle thermal management system for heating a passenger cabin of an electric vehicle by means of heat absorbed from at least a battery and an electric motor of the electric vehicle, comprising:
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a battery temperature sensor configured to detect a battery temperature of the battery; a first radiator; a cooling circuit for circulating cooling liquid, such that the cooling liquid in the cooling circuit cools at least one of the battery and the electric motor by absorbing heat from the at least one of the battery and the electric motor; one or more switching devices configured to switch the cooling circuit to different configurations such that in a first configuration, the electric motor, the battery and the first radiator are fluidly connected in series through the cooling circuit such that the first radiator dissipates heat absorbed from the battery and the electric motor into the vehicle; and in a second configuration, the battery and radiator, but not the electric motor, are fluidly connected in series through the cooling circuit such that the first radiator dissipates heat absorbed from the battery but not from the electric motor into the vehicle; and a controller configured to effectuate the cooling circuit being configured from the first configuration to the second configuration via the one or more switching devices in response to the battery sensor detecting the battery temperature is above a first threshold temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric vehicle, comprising:
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a passenger cabin; a battery; an electric motor configured to be powered by the battery; and a thermal management system configured for heating the passenger cabin by means of heat absorbed from at least one of the battery and the electric motor, the thermal management system including a cooling circuit for circulating cooling liquid, such that the cooling liquid in the cooling circuit cools at least one of the battery and the electric motor by absorbing heat from the at least one of the battery and the electric motor; one or more switching devices configured to switch the cooling circuit to different configurations such that in a first configuration, the electric motor, the battery and the first radiator are fluidly connected in series through the cooling circuit such that the first radiator dissipates heat absorbed from the battery and the electric motor into the vehicle; and in a second configuration, the battery and radiator, but not the electric motor, are fluidly connected in series through the cooling circuit such that the first radiator dissipates heat absorbed from the battery but not from the electric motor into the vehicle; and a controller configured to effectuate the cooling circuit being configured from the first configuration to the second configuration via the one or more switching devices in response to the battery sensor detecting the battery temperature is above a first threshold temperature. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification