CN108725134A - The heat management system and its adjusting method and new-energy automobile of a kind of new-energy automobile - Google Patents

Abstract

The embodiment of the present invention discloses a thermal management system of a new energy vehicle, an adjustment method thereof, and a new energy vehicle. The thermal management system includes: a battery water circuit; a motor water circuit; a positive temperature coefficient (PTC) heater located between the motor water circuit and the battery water circuit, and the PTC heater has a first water inlet, a second water inlet, a first water outlet and The second water outlet, wherein the first water inlet and the first water outlet are connected to the battery water circuit, and the second water inlet and the second water outlet are connected to the motor water circuit; wherein the PTC heater is suitable for It is configured to mix the cooling liquid in the water circuit of the battery and the cooling liquid in the water circuit of the motor in the internal space of the PTC heater. In the embodiment of the present invention, the water circuit of the motor is connected with the water circuit of the battery through the PTC heater, and the waste heat of the motor system can be used to heat the battery system, so that the available energy of the whole vehicle can be rationally used and distributed, and the redundant consumption of electric energy can be reduced.

Description

A thermal management system of a new energy vehicle and its adjustment method, and the new energy vehicle

technical field

The present invention relates to the technical field of automobiles, and more specifically, relates to a thermal management system of a new energy vehicle, an adjustment method thereof, and a new energy vehicle.

Background technique

Energy shortages, oil crises and environmental pollution are intensifying, which have a huge impact on people's lives and are directly related to the sustainable development of the country's economy and society. All countries in the world are actively developing new energy technologies. As a new energy vehicle with reduced oil consumption, low pollution, and low noise, electric vehicles are considered to be an important way to solve the energy crisis and environmental degradation. Hybrid vehicles take into account the advantages of pure electric vehicles and traditional internal combustion engine vehicles at the same time. On the premise of meeting the requirements of vehicle power and mileage, it effectively improves fuel economy and reduces emissions. It is considered to be the current energy-saving and emission reduction one of the valid paths.

In the current thermal management system of new energy vehicles, electric heating elements are commonly used to heat the battery system, which consumes energy from the power battery pack. At the same time, during the driving process, the driving motor will generate waste heat. The current practice is to use the radiator to release the waste heat of the driving motor to the environment, and this part of the heat has not been utilized.

It can be seen that when the battery needs to be heated, the current new energy vehicles consume energy to heat the battery on the one hand, and directly discard the heat generated by the motor on the other hand, which causes a waste of energy when it enters and exits.

Contents of the invention

The purpose of the present invention is to propose a thermal management system of a new energy vehicle and its adjustment method and the new energy vehicle, thereby saving energy.

The technical scheme of the embodiment of the present invention is as follows:

A thermal management system for a new energy vehicle, comprising:

battery waterway;

Motor waterway;

A positive temperature coefficient (PTC) heater located between the water circuit of the motor and the water circuit of the battery, the PTC heater has a first water inlet, a second water inlet, a first water outlet and a second water outlet, wherein the first water inlet The water port and the first water outlet are connected to the battery water circuit, and the second water inlet and the second water outlet are connected to the motor water circuit;

Wherein the PTC heater is adapted to mix the cooling liquid in the water circuit of the battery and the cooling liquid in the water circuit of the motor in the internal space of the PTC heater.

In one embodiment, the battery water circuit includes:

a first water valve connected to the first water inlet;

a second water valve connected to the first water outlet;

a temperature sensor connected to the second water valve;

Power Battery;

a first water pump connected to the power battery;

A third water valve connected to the power battery and the first water valve respectively;

A heat exchanger, one side of the heat exchanger is connected to the air conditioning system including the condenser and the compressor, and the other side is respectively connected to the third water valve, the temperature sensor and the first water pump.

In one embodiment, the motor water circuit includes:

The radiator is connected with the second water inlet;

The second water pump is connected with the second water outlet;

a motor controller connected to the second water pump;

The drive motor is connected with the motor controller;

Wherein the radiator is also connected with the drive motor.

A method for adjusting a heat management system of a new energy vehicle, the heat management system comprising: a battery water circuit; a motor water circuit; a PTC heater located between the motor water circuit and the battery water circuit, the PTC heater having a first water inlet, The second water inlet, the first water outlet and the second water outlet, wherein the first water inlet and the first water outlet are connected to the battery water circuit, and the second water inlet and the second water outlet are connected to the motor Waterway; wherein the PTC heater is adapted to mix the coolant in the battery waterway and the coolant in the motor waterway in the internal space of the PTC heater; the battery waterway includes: a first water inlet The first water valve connected; the second water valve connected with the first water outlet; the temperature sensor connected with the second water valve; the power battery; the first water pump connected with the power battery; the third water valve connected with the valves respectively; the heat exchanger, one side of the heat exchanger is connected with the air conditioning system including the condenser and the compressor, and the other side is respectively connected with the third water valve, the temperature sensor and the first water pump; The motor water circuit includes: a radiator connected to the second water inlet; a second water pump connected to the second water outlet; a motor controller connected to the second water pump; a drive motor connected to the motor controller; wherein the radiator Also connected with the drive motor;

The method includes:

When the power battery in the battery water circuit needs to be cooled, a water valve control command is issued to open the third water valve and close the first water valve and the second water valve;

Issue a command to turn on the compressor.

In one embodiment, the method also includes:

When the power battery in the battery water circuit needs to be heated, a water valve control command is issued to close the third water valve and open the first water valve and the second water valve;

Issue a command to stop the compressor.

In one embodiment, the method also includes:

When the detection value of the temperature sensor is greater than or equal to the predetermined first threshold value, a PTC heater standby command is issued.

In one embodiment, the method also includes:

When the detection value of the temperature sensor is less than the first threshold value, a PTC heater is issued to turn on the heating instruction.

In one embodiment, the method also includes:

When the detection value of the temperature sensor is greater than or equal to the predetermined second threshold value, a PTC heater stop heating command is issued, and a water valve control command for closing the second water valve (F2) is issued.

A new energy vehicle, including the thermal management system of the new energy vehicle described in any one of the above items.

In one embodiment, the new energy vehicle is a pure electric vehicle, a hybrid vehicle or a fuel cell vehicle.

From the above technical solution, it can be seen that in the embodiment of the present invention, the water circuit of the motor and the water circuit of the battery are connected through a novelly designed PTC heater, so that when the battery needs to be heated, the heat of the water circuit of the motor can be used to cool the water in the water circuit of the battery. The battery pack is heated to save energy.

In addition, the present invention also realizes energy transfer in different implementations based on the cooperative work of various valves, and is applicable to various application places.

Moreover, the embodiment of the present invention can effectively reduce the power consumption of the PTC heater, select a PTC heater with a smaller power and reduce the size of the PTC heater. At the same time, due to the reduction of power consumption of the PTC heater, the cruising range of the vehicle is also improved. Because the low-temperature coolant in the battery waterway also cools down the high-temperature coolant in the motor waterway, it can increase the power of the motor and enhance the power of the vehicle.

Description of drawings

The following drawings only illustrate and explain the present invention schematically, and do not limit the scope of the present invention.

Fig. 1 is a structural diagram of a thermal management system of a new energy vehicle according to the present invention.

FIG. 2 is an exemplary structural diagram of a thermal management system of a new energy vehicle according to an embodiment of the present invention.

FIG. 3 is an exemplary structural diagram of the thermal management system in FIG. 2 in a single working mode.

FIG. 4 is an exemplary structural diagram of the thermal management system in FIG. 2 in a coupled working mode.

Fig. 5 is a flow chart of the adjustment method of the thermal management system of the new energy vehicle according to the present invention.

Fig. 6 is an exemplary schematic structure diagram of a PTC heater according to the present invention.

FIG. 7 is a first schematic diagram of an exemplary structure of a PTC heater according to the present invention.

FIG. 8 is a second schematic diagram of an exemplary structure of a PTC heater according to the present invention.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

For the sake of brevity and intuition in description, the solution of the present invention is described below by describing several representative implementation manners. Numerous details in the embodiments are only used to help the understanding of the solutions of the present invention. But obviously, the technical solutions of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the solution of the present invention, some embodiments are not described in detail, but only a framework is given. Hereinafter, "including" means "including but not limited to", and "according to..." means "at least according to, but not limited to only based on...". Due to the language habits of Chinese, when the quantity of a component is not specifically indicated below, it means that the component can be one or more, or can be understood as at least one.

In the embodiment of the present invention, when the battery needs to be heated, the waste heat of the motor can be used to heat the battery pack, thereby reducing the power of the battery heater or not using the battery heater, so as to save energy. Specifically, the embodiment of the present invention uses a new type of PTC heater to couple the battery thermal management system and the motor thermal management system, so that the waste heat of the motor system is used to heat the battery system, so as to achieve reasonable utilization and distribution of available energy for the entire vehicle, and reduce electric energy. Excessive consumption, the purpose of extending the mileage of pure electric vehicles.

Fig. 1 is a structural diagram of a thermal management system of a new energy vehicle according to the present invention.

As shown in Figure 1, the system includes:

Battery waterway 1;

motor waterway 2;

The PTC heater 10 located between the motor water circuit 2 and the battery water circuit 1, the PTC heater 10 has a first water inlet 3, a second water inlet 4, a first water outlet 5 and a second water outlet 6, wherein the first water inlet 3 and the first water outlet 5 are connected to the battery waterway 1, and the second water inlet 4 and the second water outlet 6 are connected to the motor waterway 2;

Wherein the PTC heater 10 is adapted to mix the cooling liquid in the battery water circuit 1 and the cooling liquid in the motor water circuit 2 in the internal space of the PTC heater 10 .

It can be seen that a PTC heater coupling is added between the battery thermal management system (battery water circuit) and the motor thermal management system (motor water circuit). The PTC heater can not only provide heating for the battery water circuit, but also mix the motor water circuit with the coolant in the battery water circuit, thereby using the waste heat of the motor system to heat the battery system. The drive motor generates a lot of heat when it is working, and it needs to cool the high-temperature coolant through the radiator. Due to the large specific heat capacity of the coolant, there will be no large temperature drop in a short time, so the cooling after cooling through the radiator The temperature of the liquid is still higher than the temperature of the cooling liquid circulating in the battery box. This part of the cooling liquid passes through the PTC heater and mixes with the battery cooling liquid inside the PTC, so as to heat the original low battery cooling liquid to reduce the PTC. power consumption purposes.

Therefore, through the embodiment of the present invention, the power consumption of the PTC heater in the power battery thermal management system can be effectively reduced, and a smaller power PTC heater can be selected and the size of the PTC heater can be reduced. The cruising range of the whole vehicle is improved by the reduction; since the low-temperature coolant in the battery thermal management system also cools down the high-temperature coolant in the motor thermal management system, it can increase the power of the motor and enhance the power of the vehicle.

In one embodiment, the battery water circuit 1 includes: a first water valve connected to the first water inlet 3; a second water valve connected to the first water outlet; a temperature sensor connected to the second water valve; a power battery; The first water pump connected to the power battery; the third water valve respectively connected to the power battery and the first water valve; the heat exchanger, one side of the heat exchanger is connected to the air conditioning system including the condenser and the compressor, and the other side is connected to the A third water valve, a temperature sensor and a first water pump.

In one embodiment, the motor water circuit includes: a radiator connected to the second water inlet; a second water pump connected to the second water outlet; a motor controller connected to the second water pump; a drive motor connected to the motor controller; Wherein the radiator is also connected with the driving motor.

FIG. 2 is an exemplary structural diagram of a thermal management system of a new energy vehicle according to an embodiment of the present invention.

In Figure 2, the system includes:

Battery waterway 1;

motor waterway 2;

A PTC heater 10 located between the motor water circuit 2 and the battery water circuit 1, the PTC heater 10 has a first water inlet 3, a second water inlet 4, a first water outlet 5 and a second water outlet 6, wherein the first The water inlet 3 and the first water outlet 5 are connected to the battery water circuit 1, and the second water inlet 4 and the second water outlet 6 are connected to the motor water circuit 2; wherein the PTC heater 10 is adapted to be in the inner space of the PTC heater 10 Mix the coolant in battery water circuit 1 with the coolant in motor water circuit 2.

As shown in Figure 2, the battery water circuit 1 includes: a first water valve F1 connected to the first water inlet 3; a second water valve F2 connected to the first water outlet 5; a temperature sensor connected to the second water valve F2; power battery; the first water pump B1 connected to the battery; the third water valve F3 respectively connected to the power battery and the first water valve F1; a heat exchanger, one side of the heat exchanger is connected to the air conditioner including the condenser and the compressor The system is connected, and the other side is respectively connected to the third water valve F3, the temperature sensor and the first water pump B1.

As shown in Figure 2, the motor waterway 2 includes: a radiator connected to the second water inlet 5; a second water pump B2 connected to the second water outlet 6; a motor controller connected to the second water pump B2; a drive motor connected to the second water pump B2 The motor controller is connected; wherein the radiator is also connected with the drive motor.

Based on the structure shown in FIG. 2 , the embodiments of the present invention can be implemented in various application scenarios.

FIG. 3 is an exemplary structural diagram of the thermal management system in FIG. 2 in a single working mode. In Figure 3, battery thermal management and motor thermal management work independently.

When the ambient temperature is high and the battery system needs to be cooled, the vehicle ECU and other control units generate commands to open the third water valve F3, close the first water valve F1 and the second water valve F2, and simultaneously turn on the compressor to work.

After the compressor is turned on, it drives the low-temperature refrigerant generated by the condenser to cool down the coolant flowing through the battery box in the heat exchanger. Since the first water valve F1 and the second water valve F2 are closed, the battery cooling system and the motor cooling system are independent cooling systems at this time, the battery system cools down the coolant through the heat exchanger, and the motor system cools down through the radiator Liquid cooling, both work independently without affecting each other.

In Fig. 3, since the first water valve F1 and the second water valve F2 are closed, the water path between the first water inlet 3 of the PTC heater and the first water valve F1 is disconnected as shown by the dotted line; the PTC heater The water path between the first water outlet 5 and the third water valve F3 is disconnected as shown by the dotted line. At this time, the waterway running track of the battery waterway 1 is: first water pump B1→power battery→third water valve F3→heat exchanger, and the coolant in the heat exchanger is cooled by the air conditioning system including the compressor and the condenser . The waterway running track of the motor waterway 2 is: second water pump B2→motor controller→drive motor→radiator→second water inlet 4 of PTC heater→second water outlet 6 of PTC heater→second water pump B2 .

FIG. 4 is an exemplary structural diagram of the thermal management system in FIG. 2 in a coupled working mode. In Figure 4, battery thermal management works coupled with motor thermal management.

When the ambient temperature is low and the battery system needs to be heated, the control unit such as the vehicle ECU generates an instruction to close the third water valve F3, open the first water valve F1 and the second water valve F2, and at the same time instruct the compressor not to work. When the PTC heater is connected in series to the entire thermal management system circuit, the high-temperature coolant heated by the drive motor is mixed with the low-temperature battery coolant in the PTC heater, thereby rapidly increasing the temperature of the battery coolant.

The first outlet 5 of the PTC heater is provided with a temperature sensor (connected with the second water valve F2). When the temperature sensor detects that the coolant temperature meets the coolant temperature required for battery heating, the control unit such as the vehicle ECU instructs the PTC heater to be in a standby state. In the standby state, the PTC heater does not perform heating treatment, but the internal space of the PTC heater can still mix the coolant in the battery water circuit and the coolant in the motor water circuit.

When the temperature sensor detects that the coolant temperature is lower than the coolant temperature required for battery heating, the vehicle ECU and other control units command to turn on the PTC heater. After the PTC heater is turned on, the PTC heater heats the battery system coolant on the one hand, and on the other hand, the internal space of the PTC heater still mixes the coolant in the battery water circuit and the coolant in the motor water circuit.

When the temperature sensor detects that the coolant temperature is higher than the coolant temperature required for battery work, the control unit such as the vehicle ECU commands to close the second water valve F2, and at the same time close the PTC heater, so that the battery thermal management system and the motor thermal management system are connected. separated, and the PTC heater no longer performs heating work.

Based on the above analysis, the embodiment of the present invention also proposes a method for adjusting the thermal management system of a new energy vehicle.

FIG. 5 is a flow chart of a method for adjusting a thermal management system of a new energy vehicle according to the present invention, and the method shown in FIG. 5 is applicable to the thermal management system of a new energy vehicle shown in FIG. 2 .

The system includes: a battery waterway 1; a motor waterway 2; a PTC heater 10 located between the motor waterway 2 and the battery waterway 1, the PTC heater 10 has a first water inlet 3, a second water inlet 4, a first outlet The water port 5 and the second water outlet 6, wherein the first water inlet 3 and the first water outlet 5 are connected to the battery water circuit 1, and the second water inlet 4 and the second water outlet 6 are connected to the motor water circuit 2; wherein the PTC heater 10, It is suitable for mixing the cooling liquid in the battery water circuit 1 and the cooling liquid in the motor water circuit 2 in the inner space of the PTC heater 10 . The battery water circuit 1 includes: a first water valve F1 connected to the first water inlet 3; a second water valve F2 connected to the first water outlet 5; a temperature sensor connected to the second water valve F2; a power battery; The first water pump B1 connected to the battery; the third water valve F3 respectively connected to the power battery and the first water valve F1; the heat exchanger, one side of which is connected to the air conditioning system including the condenser and compressor, and the other side Connect the third water valve F3, the temperature sensor and the first water pump B1 respectively. The motor waterway 2 includes: a radiator connected to the second water inlet 5; a second water pump B2 connected to the second water outlet 6; a motor controller connected to the second water pump B2; a drive motor connected to the motor controller; The radiator is also connected with the drive motor.

As shown in Figure 5, the method includes:

Step 501: When the power battery in the battery water circuit 1 needs to be cooled, issue a water valve control command to open the third water valve F3 and close the first water valve F1 and the second water valve F2.

Step 502: Issue a compressor start command.

In one embodiment, the method also includes:

Step 503: When the power battery in the battery water circuit 1 needs to be heated, issue a water valve control command to close the third water valve F3 and open the first water valve F1 and the second water valve F2.

Step 504: Issue a compressor stop working instruction.

In one embodiment, the method further includes: when the detection value of the temperature sensor is greater than or equal to a predetermined first threshold value, issuing a PTC heater standby instruction.

In one embodiment, the method further includes: when the detection value of the temperature sensor is smaller than the first threshold value, sending a PTC heater to turn on the heating instruction.

In one embodiment, the method further includes: when the detection value of the temperature sensor is greater than or equal to a predetermined second threshold value, issuing a PTC heater stop heating command, and issuing a water valve control command to close the second water valve F2.

Here, the first threshold value corresponds to the threshold value of the coolant temperature required for battery heating; the second threshold value corresponds to the threshold value of the coolant temperature required for battery operation.

Preferably, the water temperature suitable for heating the battery pack is generally about 30 degrees, so the first threshold can be set to 20 degrees; the second threshold can be set to 40 degrees. It is generally believed that the temperature of the water circuit of the motor is too high (70-90°C), and the temperature of the water used for heating the battery pack cannot be too high (not exceeding 45°C), so the coolant of the motor cannot be used for heating the battery pack. The present invention uses the coupling effect of the PTC heater to mix the hot water (70-90°C) of the motor waterway and the cold water (about 0°C) of the battery waterway at low temperature to obtain the water temperature (30°C) suitable for heating the battery pack. about). Therefore, the purpose of recycling the waste heat of the motor is realized.

Moreover, the present invention also realizes energy transfer in different implementations based on the cooperative work of various types of valves, and is applicable to various application places. The present invention can be applied to new energy vehicles, such as pure electric vehicles, hybrid vehicles, fuel cell vehicles and the like.

Based on the above description, the embodiment of the present invention also proposes a PTC heater. The PTC heater may be implemented to the PTC heater 10 of FIG. 1 .

Fig. 6 is an exemplary schematic structure diagram of a PTC heater according to the present invention. FIG. 7 is a first schematic diagram of an exemplary structure of a PTC heater according to the present invention. FIG. 8 is a second schematic diagram of an exemplary structure of a PTC heater according to the present invention.

As shown in Figure 6, the PTC heater includes a housing 51 and a chamber 52 arranged in the housing 51; a PTC heating element 80 is arranged in the chamber 52;

The PTC heater also includes a first water inlet 53, a second water inlet 54, a first water outlet 55 and a second water outlet 56; the first water inlet 53, the second water inlet 54, the first water outlet 55 and the second water outlet The nozzles 56 communicate with the chambers 52 respectively;

The first water inlet 53 and the first water outlet 55 are adapted to be connected to the battery waterway of the new energy vehicle; the second water inlet 54 and the second water outlet 56 are adapted to be connected to the motor waterway of the new energy vehicle.

The first water inlet 53 can introduce the cooling liquid in the water circuit of the battery into the chamber 52 , and the second water inlet 54 can introduce the cooling liquid in the water circuit of the motor into the chamber 52 . Therefore, the cooling liquid in the water circuit of the battery and the cooling liquid in the water circuit of the motor can be mixed in the chamber 52 of the PTC heater. Moreover, the first water outlet 55 can lead the cooling liquid mixed in the chamber 52 to the battery water circuit, and the second water outlet 56 can lead the cooling liquid mixed in the chamber 52 to the motor water circuit. The casing 51 may include an upper casing and a lower casing; wherein the upper casing and the lower casing are connected via buckles.

As shown in FIGS. 7 and 8 , a first fastener 57 , a second fastener 58 , a third fastener 59 and a fourth fastener 60 are arranged on the lower housing. An air release valve 61 and a wire harness fixing member 58 are arranged on the upper housing. The deflation valve 61 is used to deflate the coolant in the chamber 52; the wire harness fixing member 58 is used to fix the wire harness of the PTC heater.

Preferably, the first fastener 57 , the second fastener 58 , the third fastener 59 and the fourth fastener 60 are implemented as bolt fasteners.

The PTC heating element 80 can be driven by electric energy to generate heat to heat the coolant in the chamber 52 . Preferably, the PTC heating element 80 has a helical structure with equal pitch. The PTC heating element 80 may be implemented as a PTC thermistor. The typical characteristic of PTC thermistor is that it is sensitive to temperature and exhibits different resistance values at different temperatures. The resistance value of PTC thermistor increases when the temperature is higher. The PTC heater proposed by the present invention can be applied to new energy vehicles, such as pure electric vehicles, hybrid vehicles, fuel cell vehicles and the like.

Therefore, in the embodiment of the present invention, the PTC heater includes a housing and a chamber arranged in the housing; a PTC heating element is arranged in the chamber; the PTC heater also includes a first water inlet, a second water inlet, a first The water outlet and the second water outlet; the first water inlet, the second water inlet, the first water outlet and the second water outlet are respectively communicated with the chamber; the first water inlet and the first water outlet are adapted to the new energy vehicle The battery is connected to the water circuit; the second water inlet and the second water outlet are adapted to be connected to the water circuit of the motor of the new energy vehicle. It can be seen that, unlike the PTC heater in the prior art with only one water inlet and one water outlet, the PTC heater of the present invention can be connected to the battery waterway and the motor waterway at the same time, and realize the coolant in the battery waterway and the motor waterway through the chamber. , and thus provide the waste heat of the drive motor to the battery, thereby reducing the energy consumption of the PTC heater.

Moreover, the present invention can select a PTC heater with a smaller power and reduce the size of the PTC heater. At the same time, due to the reduction of power consumption of the PTC heater, the cruising range of the vehicle is also improved.

In addition, since the low-temperature coolant in the battery waterway also cools down the high-temperature coolant in the motor waterway, it can increase the power of the motor and enhance the power of the vehicle.

The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalent implementation or Changes, such as combination, division or repetition of features, should be included in the protection scope of the present invention.

Claims (10)

1. A thermal management system for a new energy vehicle, characterized in that it comprises: battery waterway (1); Motor waterway (2); A positive temperature coefficient PTC heater (10) located between the motor water circuit (2) and the battery water circuit (1), the PTC heater (10) has a first water inlet (3), a second water inlet (4), The first water outlet (5) and the second water outlet (6), wherein the first water inlet (3) and the first water outlet (5) are connected to the battery waterway (1), and the second water inlet (4) and the second water outlet (6) are connected to the motor waterway (2); Wherein the PTC heater (10) is adapted to mix the cooling liquid in the battery water circuit (1) and the cooling liquid in the motor water circuit (2) in the internal space of the PTC heater (10). 2. The thermal management system of a new energy vehicle according to claim 1, wherein the battery water circuit (1) comprises: A first water valve (F1) connected to the first water inlet (3); A second water valve (F2) connected to the first water outlet (5); A temperature sensor connected to the second water valve (F2); Power Battery; A first water pump (B1) connected to the power battery; A third water valve (F3) connected to the power battery and the first water valve (F1) respectively; A heat exchanger, one side of the heat exchanger is connected to the air conditioning system including the condenser and the compressor, and the other side is respectively connected to the third water valve (F3), the temperature sensor and the first water pump (B1). 3. The thermal management system of a new energy vehicle according to claim 1, characterized in that the motor water circuit (2) comprises: The radiator is connected with the second water inlet (5); The second water pump (B2) is connected with the second water outlet (6); The motor controller is connected with the second water pump (B2); The drive motor is connected with the motor controller; Wherein the radiator is also connected with the drive motor. 4. A method for adjusting the thermal management system of a new energy vehicle, characterized in that the thermal management system includes: battery waterway (1); motor waterway (2); motor waterway (2) and battery waterway (1) The positive temperature coefficient PTC heater (10) between, described PTC heater (10) has first water inlet (3), second water inlet (4), first water outlet (5) and second water outlet (6), wherein the first water inlet (3) and the first water outlet (5) are connected to the battery waterway (1), and the second water inlet (4) is connected to the second water outlet (6) to the motor waterway (2); wherein the PTC heater (10) is adapted to mix the coolant in the battery waterway (1) and the motor waterway in the internal space of the PTC heater (10) (2) cooling liquid; the battery water circuit (1) includes: a first water valve (F1) connected to the first water inlet (3); a second water valve (F1) connected to the first water outlet (5) F2); a temperature sensor connected to the second water valve (F2); a power battery; a first water pump (B1) connected to the power battery; a third water pump connected to the power battery and the first water valve (F1) respectively Valve (F3); heat exchanger, one side of the heat exchanger is connected to the air conditioning system including the condenser and the compressor, and the other side is respectively connected to the third water valve (F3), the temperature sensor and the first water pump (B1) The motor waterway (2) includes: a radiator connected to the second water inlet (5); a second water pump (B2) connected to the second water outlet (6); a motor controller connected to the second water pump (B2 ) is connected; the drive motor is connected with the motor controller; wherein the radiator is also connected with the drive motor; The method includes: When the power battery in the battery water circuit (1) needs to be cooled, a water valve control command is issued to open the third water valve (F3), close the first water valve (F1) and the second water valve (F2); Issue a command to turn on the compressor. 5. The adjustment method of the thermal management system of the new energy vehicle according to claim 4, characterized in that the method further comprises: When the power battery in the battery water circuit (1) needs to be heated, a water valve control command is issued to close the third water valve (F3) and open the first water valve (F1) and the second water valve (F2); Issue a command to stop the compressor. 6. The adjustment method of the thermal management system of the new energy vehicle according to claim 5, characterized in that the method further comprises: When the detection value of the temperature sensor is greater than or equal to the predetermined first threshold value, a PTC heater standby command is issued. 7. The adjustment method of the thermal management system of the new energy vehicle according to claim 6, characterized in that the method further comprises: When the detection value of the temperature sensor is less than the first threshold value, a PTC heater is issued to turn on the heating instruction. 8. The adjustment method of the thermal management system of the new energy vehicle according to claim 7, characterized in that the method further comprises: When the detection value of the temperature sensor is greater than or equal to the predetermined second threshold value, a PTC heater stop heating command is issued, and a water valve control command for closing the second water valve (F2) is issued. 9. A new energy vehicle, characterized in that it comprises the thermal management system of the new energy vehicle according to any one of claims 1-3. 10. The new energy vehicle according to claim 9, characterized in that the new energy vehicle is a pure electric vehicle, a hybrid vehicle or a fuel cell vehicle.