KR20120137916A - Waste heat management system for electric vehicle - Google Patents

Abstract

PURPOSE: A waste heat management system for electric vehicles is provided to reduce the power consumption of a heating system by using waste heat generated in all kinds of application components to an air conditioning system for vehicles. CONSTITUTION: A waste heat management system for electric vehicles comprises an electric water pump(2), a radiator(21), a heater core(22), cooling water lines(9a,9b,9c), a component temperature sensor, and a multi-control valve(10). The electric water pump forcibly pumps and circulates cooling water. The radiator discharges the heat of the cooling water. The heater core discharges and supplies the heat of the cooling water to air discharged into an internal side of a vehicle with an air conditioning blower(31). The cooling water lines are arranged to circulate the cooling water forcibly pumped by the electric water pump. The component temperature sensor detects the temperature of each appliance component. The opening and closing of the multi-control valve is controlled by a controller according to the detection signals of the component temperature sensor. [Reference numerals] (1) Cooling water tank(RSVR); (2) Electric water pump(EWP); (21) Radiator; (22) Heater core; (30) PTC heater; (4) Inverter; (5) Motor; (7) LDC; (8) Charger

Description

Waste heat management system for electric vehicle

The present invention relates to a waste heat management system of an electric vehicle, and more particularly, to reduce the power consumed by various electric components in the vehicle such as an electric heater or a driving motor of a heating system by maximizing the waste heat generated from the vehicle. It relates to a waste heat management system of an electric vehicle that can increase the distance.

Today, internal combustion engine (engine) vehicles using fossil fuels have many problems such as environmental pollution caused by exhaust gas, global warming caused by carbon dioxide, and respiratory disease caused by ozone generation.

And because fossil fuels on Earth are so limited, they are in danger of becoming exhausted someday.

Accordingly, the development of pollution-free and environmentally friendly electric vehicles (EVs) that use an electric motor as a driving source is actively progressing.

In addition to the electric motor (driving motor) for driving the vehicle, the electric vehicle is equipped with a battery for supplying power to the electric motor, which is driven after charging the battery from an external charging device before driving.

In addition, electric vehicles include electric chargers such as internal chargers for battery charging, inverters for rotating drive motors, and low voltage DC-DC converters (hereinafter referred to as LDCs) for output conversion between high and low voltages. Power Electronic Parts) are mounted.

The inverter converts the power supplied from the battery according to a control signal applied from the controller to drive the driving motor, and the LDC converts the high voltage direct current of the high voltage battery into a low voltage direct current to supply the load in the vehicle.

In addition, since electric cars do not have an internal combustion engine (engine) that is a heat source for indoor heating, unlike an internal combustion engine car, an electric heater (eg, a PTC heater) is used as a heating heater, and a compressor for cooling an interior also drives an internal combustion engine. Electric compressor is used because it cannot be used.

In the electric vehicle as described above, due to the limitation of the energy accumulation density of the battery, the cruising distance (one-charge driving distance) is very important, and in order to increase the cruising distance, it is very important to reduce the electric load in the vehicle.

In particular, during operation of the air conditioning system, a lot of power is consumed due to the operation of the electric heater, the compressor, the air conditioning blower, and due to the power consumption at this time the maximum range is greatly reduced compared to the range of the non-operating range.

In addition, in the case of electric vehicles, since the waste heat is low, a separate heat source is required for indoor heating unlike an internal combustion engine car, and a high voltage PTC heater is mainly used as a heating heater, and a high voltage PTC heater requires a large power consumption.

In addition, the lower the drive unit such as the drive motor consumes more power due to the increase in the lubrication friction coefficient.

Accordingly, the present invention has been made in consideration of the above-mentioned matters, and utilizes the waste heat generated in the vehicle to the fullest to reduce the power consumption of various electric components in the vehicle such as electric heaters or drive motors of the heating system, thereby reducing the cruising distance of the vehicle. The purpose is to provide an electric vehicle waste heat management system that can increase the.

In addition, an object of the present invention is to provide a system that can efficiently manage and utilize the heat generated by the various electrical components mounted on the electric vehicle.

In order to achieve the above object, the present invention includes an electric water pump for circulating the cooling water by circulating; A radiator for dissipating heat of the cooling water; A heater core for discharging and supplying heat of cooling water to the air discharged into the vehicle interior by the air conditioning blower; A coolant line provided to circulate through the radiator and the heater core after the coolant pumped by the water pump passes through a plurality of electrical components; And a component temperature sensor for detecting a temperature of each electrical component, wherein the plurality of electrical components are divided into a first group of electrical components and a second group of electrical components separately connected in series by a coolant line. A multi-control valve is installed between a coolant line to which a group 1 electric component is connected, and a coolant line to which a second electric component is connected to the second group to control an opening / closing state by a controller according to a detection signal of the component temperature sensor. The control valve supplies the coolant that has passed through the first group of electrical components to at least one selected path from among the coolant line 1 connected to the radiator, the coolant line 2 connected to the second group of electrical components, and the coolant line 3 connected to the heater core. It provides a waste heat management system of an electric vehicle, characterized in that the opening and closing state is controlled to.

A first cooling mode in which the controller controls the open / closed state of the multi control valve so that the coolant passing through the first component of the first group is supplied to the coolant line 1 to cool only the first component of the first component; A part warm mode in which the coolant passing through the first group of electric components is supplied to the cooling water line 2 so that the first and second groups of electrical components are warmed up; An air conditioning mode in which the coolant passing through the first component of the first group is supplied to the coolant line 3 and the air heated by the heater core is supplied to the vehicle interior; Controlled by any one of the operating mode of the second cooling mode, the cooling water passing through the first electric component of the first group is supplied to the cooling water line 1 and the cooling water line 2 at the same time to cool the entire electric component of the first group and the second group; It is characterized by.

Accordingly, in the waste heat management system of the electric vehicle according to the present invention, by maximizing the waste heat generated from various electric components, it is possible to reduce the power consumed by the heating system and increase the range of travel of the vehicle. have.

In addition, in the present invention, it is possible to efficiently manage and utilize the heat generation of various electric components mounted on the electric vehicle, and has the advantage of optimizing the thermal management of the vehicle by integrating the heating and cooling functions of the electric components and heating using waste heat. .

In addition, the present invention can improve the operating efficiency of the inverter and the motor at a low temperature through the warm-up function of the electrical components, and contribute to increase the range because the power consumption can be minimized at low temperatures.

In addition, it is possible to minimize the on / off repetition of the electric heater for controlling the temperature of the indoor discharge air in the transition season, thereby improving the battery endurance life as well as increase the cruising distance by preventing energy loss.

1 is a block diagram showing a waste heat management system of an electric vehicle according to the present invention.
2 is a flowchart illustrating an operation state for each mode in the present invention.
3 is a view illustrating a state in which the operation mode is determined according to the temperature of each electric component in the present invention.
4 is a view illustrating a control state of the water pump in the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

The present invention is to enable the efficient management and utilization of heat generated by the electrical components (PE parts) of the electric vehicle, such as inverters, drive motors, LDC, chargers, and also the electrical field during operation of the low temperature region or heating system (winter or season) It is to increase the range of electric vehicle by reducing power consumption of parts.

In particular, the present invention is configured to maximize the waste heat of the electrical components during the operation of the heating system, to reduce the power consumption compared to the system using a conventional electric heater alone, the automatic temperature control mode of the season (ATC operation ), It is possible to maintain the vehicle's indoor temperature at the driver's set temperature only by waste heat instead of electric heater.

In addition, it can reduce unnecessary power consumption through rapid warm-up of the drive unit at low temperatures.

1 is a configuration diagram showing a waste heat management system of an electric vehicle according to the present invention. As shown, coolant lines 9a to 9d of various paths such that the coolant passes through the electric components 4, 5, 7, and 8 are illustrated. In particular, by controlling the valve 10 in accordance with the set conditions, the cooling water flows to the selected place of the coolant line of the various paths, the system to be selected and operated in the component cooling mode, component warm-up mode, air conditioning mode It is composed.

First, the waste heat management system of the present invention includes a cooling water tank 1 in which cooling water is stored, an electric water pump 2 for circulating and circulating cooling water in the cooling water tank 1, and a radiator for dissipating heat of cooling water ( 21, a heater core 22 for releasing and supplying heat of cooling water to air discharged into the vehicle interior by the air conditioning blower 31, and cooling water pumped by the water pump 2 for each electric component 4 , 5, 7, 8, and the radiator 21, the cooling water line (9a ~ 9d) provided to be circulated through the heater core (22).

The electrical component is a component that generates heat during operation, and may be an inverter (4), a driving motor (5), an LDC (7), a charger (8), and each electrical component such that cooling water circulates through them in turn. Cooling water lines 9a and 9c are connected.

Each of the electrical components is provided with a heat transfer structure to allow heat transfer with the cooling water. For example, an inlet and an outlet port are provided in a housing in which the electrical component is stored, and a cooling water line is connected to the inlet and outlet ports. It is possible to allow heat transfer with the electrical components contained in the housing while the cooling water flowing therethrough passes through the housing.

Alternatively, it is possible to provide a water jacket-type cooling water flow path in the housing of the electrical component, such that heat is transferred to the electrical component while the cooling water passes through the water jacket of the housing.

In addition, according to the present invention, the electric parts of the electric vehicle are divided into a first group and a second group according to component characteristics, and the first group of electric parts 3 are connected in series through a coolant line 9a to sequentially pass cooling water. In addition, the second group of electric parts 6 are also connected in series through the coolant line 9c so that the coolant passes sequentially, and the coolant having passed through the first parts of the electric parts 3 of the first group has the electric field of the second group. The valve 10 is installed in the coolant lines 9a and 9c between the first group and the second group of electrical components 3 and 6 so as to selectively pass the components 6.

In the embodiment of the present invention, the first group of electric components 3 includes an inverter 4 and a driving motor 5 which are in a high heat generation state while driving the vehicle, which are connected in series through the coolant line 9a. . In addition, the second group of electric components 6 may include a relatively low heat generating component LDC (7) and a charger (8) that generates heat during battery charging, they are connected in series through the cooling water line (9c) do.

As the valve 10, a multi-control valve having one inlet port 11 and three outlet ports 12 to 14 is employed, and one of the outlet ports is connected to the second group of electrical components 7. A coolant line 9c is connected to the other, and a coolant line 9b connected to the inlet of the radiator 21 and a coolant line 9d connected to the inlet of the heater core 22 are connected to the other.

In addition, the outlet of the radiator 21 and the outlet of the heater core 22 are respectively connected to the coolant tank 1 through the coolant line.

Accordingly, the multi control valve 10 is connected to the cooling water passing through the first electric component 3 of the first group according to the open / closed state of the outlet ports 12 to 14 by a radiator 21 (cooling water line ( 9b), the coolant line 9c connected to the second group of electric components 6, and the coolant line 9d connected to the heater core 22 can be supplied to one or more selected paths.

Hereinafter, in the present specification, the outlet port 12 connected to the radiator 21 is connected to the first outlet port, and the outlet port 13 connected to the second electronic component 6 is connected to the second outlet port. The outlet port connected to the heater core 22 will be referred to as a third outlet port 14.

In this structure, the first group of electric component parts 3 are arranged to be connected between the water pump 2 and the multi control valve 10 through a coolant line 9a, and the second group of electric component parts 6 are multiplied. The control valve 10 and the coolant tank 1 are arranged to be connected through a coolant line 9c.

Therefore, in the state where the first outlet port 12 of the multi control valve 10 is open, the coolant pumped by the water pump 2 passes through the first group of electrical components 3 in turn, and then the coolant line 9b. Through the radiator 21 is returned to the coolant tank (1).

In addition, when the second outlet port 13 is opened, the coolant pumped by the water pump 2 passes through the first group of electrical components 3 and the second group of electrical components 6 in sequence, and then the cooling water line. It is possible to return to the coolant tank 1 via 9c.

In addition, in the state where the third outlet port 14 is opened, the coolant pumped by the water pump 2 passes through the first group of electrical components 3 in turn, and then passes through the heater core 22 to the coolant tank 1. Will return.

The multi control valve 10 is an electronic valve in which an open / close state is controlled according to an electrical signal (control signal) output from a controller (which may be an air conditioning controller) (not shown), and each outlet is controlled by a control signal of the controller. The valve body is opened and closed to open and close the ports 12 to 14, and only one outlet port selected from the first, second, and third outlet ports 12 to 14 is opened solely according to the controlled position of the valve body, The selected two outlet ports have a valve configuration that can be opened simultaneously.

As such, the multi-control valve in which one or more ports of the plurality of ports are selectively opened is a well-known valve that is widely used in the industry, and thus, the structure or configuration of the multi-control valve is not particularly limited in the present invention. If it is a valve that can selectively open, one of various forms of multi-control valve can be employed in the skill level of those skilled in the art.

The heater core 22 serves as an auxiliary heater used for indoor heating by assisting the electric heater 30, that is, PTC heater, the air blown by the air conditioning blower 31 is the heater core 22 and PTC heater It is arrange | positioned so that it may pass through 30 in order.

The coolant line 9d is connected to the heater core 22 to allow the coolant to receive the waste heat of the electric component to pass therethrough, thereby providing an auxiliary heater device for utilizing the waste heat generated from the electric component for indoor heating.

When the air conditioning blower 31 is driven while the coolant receiving the heat of the electric component is transferred to the heater core 22, the warmth may be supplied to the vehicle interior. Thus, the heater core 22 using the waste heat of the electric component ) Is used as the auxiliary heater device can reduce the capacity of the existing PTC heater 30 or reduce the power consumption of the PTC heater.

On the other hand, the waste heat management system of the present invention is a water temperature sensor (not shown) for detecting the temperature of the cooling water, a component temperature sensor (not shown) for detecting the temperature of each electrical component, and for detecting the air temperature of the rear end of the heater core An air temperature sensor (not shown) is further included, wherein each sensor is connected to the controller to enable input of a detection signal.

Here, the water temperature sensor is provided to detect the temperature of the cooling water that has passed through the electric component 3 of the first group.

Accordingly, in the present invention, the controller determines the operation mode based on the temperature information collected from each sensor, and also controls the open / closed state of the multi control valve 10 according to the operation mode.

That is, the controller controls the open / closed state of the multi control valve 10 according to each state based on the collected temperature information, in which the component cooling mode (first cooling mode / second cooling mode), component warm-up mode, air conditioning It operates in one of the modes, each mode and operation state for each mode described with reference to Figures 2 to 4 as follows. 2 is a flowchart illustrating an operation state for each mode in the present invention.

First, a state in which the first outlet port 12 of the multi control valve 10 is opened is a part cooling mode for cooling the first component parts 3 of the first group, that is, a first cooling mode. In the non-operating condition of the electric heater (PTC heater) 30, the state in which the second outlet port 13 is opened is a component warm-up mode in which the electrical components of the first group and the second group are warmed up.

In the first cooling mode in which the first outlet port 12 is opened, the coolant pumped by the water pump 2 in turn turns the inverter 4 and the driving motor 5, which are the first component parts 3 of the first group. They are cooled while passing, and then the coolant is cooled in the radiator 21 and returned to the coolant tank 1.

In addition, in the component warm-up mode in which the second outlet port 13 is opened, the coolant pumped by the water pump 2 is driven by the first and second groups of electrical components 3 and 6, that is, the inverter 4. It passes through the motor 5, the LDC 7, and the charger 8 in turn, but then returns to the coolant tank 1 without dissipating the coolant.

In the component warm-up mode, since the coolant circulates the entire electrical components without heat dissipation, heat can be transferred from the relatively high temperature electrical components to the low temperature electrical components through the coolant, and the entire electrical components can be warmed up evenly.

For example, the water pump 2 may be driven at low temperature to transfer heat of the charger 8, which is a heat generating component, to the inverter 4, the driving motor 5, and the LDC 7 through circulation of the cooling water. These parts can be warmed up in advance during pre-travel charging.

The operation of the water pump 2 in the component warm-up mode can be controlled on / off according to the temperature of the first group electric component 3.

That is, the temperature of any one of the first group electric component 3, which is a relatively high heat generating component, that is, the temperature of the inverter 4 or the driving motor 5 is set in advance in consideration of the efficiency point component temperature for each component. The water pump 2 is operated only when the water pump 2 is higher. Otherwise, the water pump 2 is turned off to warm up the electric component by self-heating rather than cooling water.

Here, the efficiency point component temperature is a temperature of the corresponding component showing the optimum efficiency, and may be a temperature obtained through a preceding test, and the set temperature may be 'efficiency point component temperature + β' (β is a set value). ). In addition, since the operation amount of the water pump is not critical, it may be set to operate at less than 50% duty.

In addition, the state in which the third outlet port 14 is opened is an air-conditioning mode in which heating or automatic temperature control (ATC operation) is performed by using waste heat generated from the first electronic component 3, and the first and second outlet ports are provided. The state in which (12, 13) is open at the same time is the part cooling mode, that is, the second cooling mode, which cools the entire electric parts 3, 6 of the first group and the second group.

In the air-conditioning mode in which the third outlet port 14 is opened, the coolant pumped by the water pump 2 passes through the inverter 4 and the driving motor 5 which are the first electric component parts 3 in order. The heater core 22 is returned to the coolant tank 1.

In such an air conditioning mode, since the coolant received waste heat from the inverter 4 and the driving motor 5 which are relatively high heat generating components passes through the heater core 22, the air conditioner blower 31 is operated in the heater core 22. The heated air can be discharged to the vehicle interior, thereby enabling indoor heating using waste heat.

In the second cooling mode in which the first and second outlet ports 12 and 13 are simultaneously opened, the coolant pumped by the water pump 2 is the first group of electrical components 3 and the second group of electrical components ( 6) and all of the radiator 21 is circulated so that the entire electrical component can be cooled.

In addition, the state in which the second and third outlet ports 13 and 14 are simultaneously opened includes the air conditioning mode in which heating or automatic temperature control (ATC) is performed, and the first and second electrical components 3 and 6 of the first and second groups. This is a mode in which the cooling parts cooling mode, that is, the second cooling mode, is simultaneously performed.

In the mode in which the second and third outlet ports 13 and 14 are simultaneously opened, the coolant pumped by the water pump 2 is one group of electrical components 3 and two groups of electrical components 6, and a room Since all of the heater cores 22 for air conditioning are circulated, the air heated by the heater cores 22 is discharged to the vehicle interior (air conditioning mode), and the entire electric parts are made of cooling water that is radiated from the heater cores 22. All can be cooled.

In the multi control valve 10 performing the above mode control, preferably, the flow path area of the second outlet port 13 is smaller than the flow path area of the first outlet port 12 and the third outlet port 14. In this case, the flow path area of the first outlet port 12 and the third outlet port 14 may be equally set.

In addition, in controlling the open / closed state of the multi-control valve 10 as described above, the component cooling mode, that is, the first cooling mode and the second cooling mode, and the component warm-up mode and the air conditioning mode are each of the first group and the second group. Determined and operated according to the temperature of the electric component, Figure 3 is a view illustrating a state in which the operation mode is determined according to the temperature of the electric component.

As shown, the respective temperature thresholds for entering the component cooling mode, the component warm-up mode, and the air conditioning mode are set for each electrical component, and among the electrical components 3 of the first group and the electrical components of the second group, respectively. If any one of the (6) each satisfies the mode-specific temperature conditions, the opening and closing state of the multi-control valve 10 is controlled by the controller to enter the mode.

For example, when the temperature of any one of the first group of electronic parts 3 and the second group of the electric parts 6 rises above the temperature threshold, the first of the multi-control valve 10 And a second cooling mode in which both of the second outlet ports 12 and 13 are opened to cool all of the electric components.

In addition, when the temperature of all of the second group electrical components 6 is lower than the temperature threshold, the first cooling mode is performed in which only the first outlet port 12 is opened to cool only the first group electrical components 3.

The operating amount (corresponding to driving power and rotational speed) of the water pump 2 in the component cooling mode, that is, the first and second cooling modes, is the difference between the electrical component temperature and the preset management value K, that is, the temperature excess amount. It is controlled in proportion to, and the greater the temperature excess, the greater the amount of operation of the water pump (2).

Referring to Figure 4 (b), it shows that the operating amount of the water pump in the component cooling mode is controlled in proportion to the temperature excess amount.

In addition, in the air conditioning mode, the air conditioner mode is performed only in the normal operating conditions of the air conditioning blower 31 and the electric heater (PTC heater) 30 after the driver sets the Mokpo temperature by operating the air conditioning switch.

In addition, the air conditioning mode and the component warm-up mode may be set in the same manner as the electric component temperature condition, that is, the temperature threshold as shown in FIG. 3, but the component warm-up mode may not be an operating condition of the air conditioning blower 31 and the electric heater 30. This is the case.

In addition, when the temperature of the second group electric component (LDC, charger) 6 exceeds the threshold value under the operating conditions of the air conditioning blower 31 and the electric heater 30, the second and third of the multi control valve 10 By simultaneously opening the outlet ports 13 and 14, the second cooling mode is performed simultaneously with the air conditioning mode.

Here, in the state where the air conditioning mode is performed, that is, the air conditioning mode alone or the air conditioning mode and the second cooling mode are simultaneously performed, the cooling water temperature detected by the water temperature sensor (passes the inverter and drive motor of the first group of electric components). When the coolant temperature is higher than the air temperature (air temperature at the rear end of the heater core) + the set value α detected by the air temperature sensor, the operating amount of the air conditioning blower 31 (i.e. blower strength, driving power and The amount of rotation (corresponding to the driving power and the number of rotations) of the water pump 2 according to the rotational speed.

However, the operation of the water pump 2 is turned off if the cooling water temperature is equal to or lower than the 'air temperature + set value α'.

Referring to FIG. 4A, when the cooling water temperature after entering the air conditioning mode is higher than the 'air temperature + set value α', the operating amount of the water pump is controlled according to the operating amount of the air conditioning blower.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are provided. Also included in the scope of the present invention.

1: cooling water tank 2: water pump
3: first group electric parts 4: inverter
5: drive motor 6: second group electric parts
7: LDC 8: charger
9a, 9b, 9c: cooling water line 10: multi control valve
11: inlet port 12: first outlet port
13: 2nd exit port 14: 3rd exit port
21: radiator 22: heater core
30: electric heater (PTC heater) 31: air conditioning blower

Claims (11)

An electric water pump for pumping and circulating the cooling water;
A radiator for dissipating heat of the cooling water;
A heater core for discharging and supplying heat of cooling water to the air discharged into the vehicle interior by the air conditioning blower;
A coolant line provided to circulate through the radiator and the heater core after the coolant pumped by the water pump passes through a plurality of electrical components;
And a component temperature sensor detecting a temperature of each electrical component.
The plurality of electrical components are divided into electrical components of a first group and electrical components of a second group, which are each separately connected in series by a cooling water line.
A multi-control valve is installed between the coolant line to which the first component of the electronic component is connected and the coolant line to which the electronic component of the second group is connected to control the opening and closing state by the controller according to the detection signal of the component temperature sensor.
The multi-control valve may include at least one selected path among the coolant line 1 connected to the radiator to the coolant line 1 connected to the radiator, the coolant line 2 connected to the second group electric component, and the coolant line 3 connected to the heater core. Waste heat management system of an electric vehicle, characterized in that the opening and closing state to be controlled to supply.
The method according to claim 1,
The first group of electronic components includes an inverter and a driving motor having a relatively high heat generation while driving a vehicle, and the second group of electronic components includes a DC-DC converter having a relatively low heat generation and a charger that generates heat while charging a battery. Waste heat management system of an electric vehicle comprising a.
The method according to claim 1,
A water temperature sensor which detects a temperature of the cooling water passing through the first group of electric components;
Air temperature sensor for detecting the air temperature of the rear end of the heater core;
And the controller is configured to control the operation of the water pump based on the detection signal of the component temperature sensor, the water temperature sensor, and the air temperature sensor.
The method according to claim 1,
By the controller controlling the opening and closing state of the multi control valve,
A first cooling mode in which the coolant passing through the first group of electric components is supplied to the cooling water line 1 to cool only the first group of electrical components;
A part warm mode in which the coolant passing through the first group of electric components is supplied to the cooling water line 2 so that the first and second groups of electrical components are warmed up;
An air conditioning mode in which the coolant passing through the first component of the first group is supplied to the coolant line 3 and the air heated by the heater core is supplied to the vehicle interior;
Controlled by any one of the operating mode of the second cooling mode, the cooling water passing through the first electric component of the first group is supplied to the cooling water line 1 and the cooling water line 2 at the same time to cool the entire electric component of the first group and the second group; Waste heat management system of an electric vehicle, characterized in that.
The method of claim 4,
The waste heat of the electric vehicle further comprises a mode in which the coolant having passed through the electric component of the first group is simultaneously supplied to the coolant line 2 and the coolant line 3 so that the air conditioning mode and the second cooling mode are simultaneously performed. Management system.
The method according to claim 4 or 5,
The air conditioning mode is waste heat management system of an electric vehicle, characterized in that carried out in the operating conditions of the air conditioning blower and electric heater.
The method of claim 6,
The air conditioning mode is a waste heat management system of an electric vehicle, characterized in that performed by operating the water pump when the 'cooling water temperature detected by the water temperature sensor> the air temperature of the rear end of the heater core detected by the air temperature sensor + α'.
(Wherein, the cooling water temperature is the cooling water temperature passing through the electrical components of the first group, α is a preset value)
The method of claim 7,
Waste water management system of an electric vehicle, characterized in that the operation amount of the water pump is controlled according to the operation amount of the air conditioning blower.
The method according to claim 4 or 5,
The first cooling mode is performed when the temperature of the electronic component included in the second group is less than the preset temperature threshold, and the second cooling mode is performed when the temperature of the electronic component included in the second group is greater than or equal to the preset temperature threshold. Waste heat management system of an electric vehicle.
The method according to claim 9,
In the first cooling mode and the second cooling mode, the operation amount of the water pump is controlled in proportion to the difference between the temperature of the electronic component and the management value K, and the larger the difference, the operation amount of the water pump is increased. Waste heat management system of electric vehicle.
The method of claim 4,
The electric vehicle, characterized in that for operating the water pump when the temperature of one of the first group of electronic parts in the component warm-up mode is higher than the preset temperature set in consideration of the efficiency of the component, otherwise off the water pump Waste heat management system.

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