阅读说明：本技术 一种新能源汽车电池加热系统 (New energy automobile battery heating system ) 是由 刘子萌 张栋杰 刘劲松 夏嵩勇 于 2020-03-31 设计创作，主要内容包括：本发明公开了一种新能源汽车电池加热系统,包括:电池回路、混水设备、第一单向阀和乘员舱加热回路；电池回路包括依次通过冷却液管路串联的第二三通阀、第二膨胀水壶、第三水泵、电池组和冷却器；第一单向阀的进水端连接冷却器和第二三通阀的一个进口端,第一单向阀的另一端连接混水设备的进口端；混水设备的出口端连接第二三通阀的另一进口端；乘员舱加热回路包括依次通过冷却液管路串联的第二水泵、加热器、第一三通阀和暖风芯体；第一三通阀的第一出口端连接暖风芯体的一端,暖风芯体的另一端分别连接混水设备的出口端和第二水泵的进口端,第一三通阀的第二出口端连接混水设备。本发明所涉及新能源汽车电池加热系统使用的零部件少,成本低等特点。(The invention discloses a new energy automobile battery heating system, which comprises a battery loop, a water mixing device, a first one-way valve and a passenger cabin heating loop, wherein the battery loop is connected with the water mixing device; the battery loop comprises a second three-way valve, a second expansion kettle, a third water pump, a battery pack and a cooler which are sequentially connected in series through a cooling liquid pipeline; the water inlet end of the first one-way valve is connected with the cooler and one inlet end of the second three-way valve, and the other end of the first one-way valve is connected with the inlet end of the water mixing device; the outlet end of the water mixing device is connected with the other inlet end of the second three-way valve; the passenger cabin heating loop comprises a second water pump, a heater, a first three-way valve and a warm air core body which are sequentially connected in series through a cooling liquid pipeline; the first outlet end of the first three-way valve is connected with one end of the warm air core body, the other end of the warm air core body is respectively connected with the outlet end of the water mixing device and the inlet end of the second water pump, and the second outlet end of the first three-way valve is connected with the water mixing device. The new energy automobile battery heating system has the characteristics of few used parts, low cost and the like.)

1. The new energy automobile battery heating system is characterized by comprising a battery loop, a water mixing device (5), a first one-way valve (15) and a passenger cabin heating loop;

the battery loop comprises a second three-way valve (10), a second expansion kettle (11), a third water pump (12), a battery pack (13) and a cooler (14) which are connected in series through a cooling liquid pipeline in sequence;

the water inlet end of the first one-way valve (15) is connected with the cooler (14) and one inlet end of the second three-way valve (10), and the other end of the first one-way valve (15) is connected with the inlet end of the water mixing device (5); the outlet end of the water mixing device (5) is connected with the other inlet end of the second three-way valve (10);

the passenger compartment heating loop comprises a second water pump (7), a heater (8), a first three-way valve (9) and a warm air core body (30) which are sequentially connected in series through a cooling liquid pipeline;

the first outlet end of the first three-way valve (9) is connected with one end of the warm air core body (30), the other end of the warm air core body (30) is respectively connected with the outlet end of the water mixing device (5) and the inlet end of the second water pump (7), and the second outlet end of the first three-way valve (9) is connected with the water mixing device (5).

2. The system of claim 1, further comprising a motor circuit;

the motor loop comprises a first expansion kettle (1), a first water pump (2), a charger (3) and a motor (4) which are connected in series through a cooling liquid pipeline in sequence;

the inlet end of the first expansion kettle (1) is connected with the outlet end of the water mixing device (5), and the outlet end of the motor is connected with the inlet end of the water mixing device (5).

3. The system of claim 2, further comprising: a low temperature radiator (16);

the motor loop further comprises a fourth three-way valve (17), the inlet end of the fourth three-way valve (17) is connected with one end of the motor (4), the first outlet end of the fourth three-way valve (17) is connected with the inlet end of the water mixing device (5), the second outlet end of the fourth three-way valve (17) is connected with one end of the low-temperature radiator (16), and the other end of the low-temperature radiator (16) is connected with the inlet end of the water mixing device (5).

4. The system of claim 3, wherein the motor circuit further comprises: and the water inlet end of the third one-way valve (6) is respectively connected with the other end of the low-temperature radiator (16) and the second outlet end of the fourth three-way valve (17).

5. The system of claim 4, further comprising: an air conditioning circuit;

the air conditioning loop comprises a liquid-gas separator (18), a compressor (19), an internal condenser (20), a normally open electromagnetic valve (21), an external heat exchanger (22), a second one-way valve (23), a first electronic expansion valve (24) and an evaporator (25) which are sequentially connected in series.

6. The system of claim 5, wherein the air conditioning circuit further comprises: one end of the second electronic expansion valve (26) is connected with an outlet of the second one-way valve (23), the other end of the second electronic expansion valve (26) is connected with an inlet of the cooler (14), and an outlet of the cooler (14) is connected with the liquid-gas separator (18).

7. The system of claim 6, wherein the air conditioning circuit further comprises: a third electronic expansion valve (27) and a first normally closed solenoid valve (28), wherein the third electronic expansion valve (27) is connected with the normally open solenoid valve (21) in parallel; one end of the first normally closed solenoid valve (28) is connected between the evaporator (25) and the normally open solenoid valve (21), and the other end of the first normally closed solenoid valve (28) is connected with one end of the second electronic expansion valve (26).

8. The system of claim 7, wherein the air conditioning circuit further comprises: one end of the second normally closed electromagnetic valve (29) is connected with the external heat exchanger (22), and the other end of the second normally closed electromagnetic valve (29) is connected with the liquid-gas separator (18).

9. A system according to claim 8, characterised in that the first three-way valve (9), the second three-way valve (10), the fourth three-way valve (17), the first non-return valve (15) and the second non-return valve (23) are all adjustable flow control valves.

10. A new energy automobile, characterized in that the new energy automobile is provided with the new energy automobile battery heating system of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of new energy automobile heat management, in particular to a new energy automobile battery heating system.

Background

With the popularization of new energy vehicles, the safety of the new energy vehicles is more and more concerned by people.

Because the existing new energy automobile is not provided with a battery heating function, the new energy automobile needs to consume electric energy alone to heat the new energy automobile in winter, and the endurance of the battery are reduced in a low-temperature environment.

Therefore, it is needed to provide a new energy vehicle battery heating system capable of heating a new energy vehicle battery and a passenger compartment, so as to improve the activity, the endurance mileage and the user satisfaction of the battery.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a new energy automobile battery heating system, which comprises a battery loop, a water mixing device, a first one-way valve and a passenger cabin heating loop, wherein the battery loop is connected with the water mixing device;

the battery loop comprises a second three-way valve, a second expansion kettle, a third water pump, a battery pack and a cooler which are sequentially connected in series through a cooling liquid pipeline;

the water inlet end of the first one-way valve is connected with the cooler and one inlet end of the second three-way valve, and the other end of the first one-way valve is connected with the inlet end of the water mixing device; the outlet end of the water mixing device is connected with the other inlet end of the second three-way valve;

the passenger cabin heating loop comprises a second water pump, a heater, a first three-way valve and a warm air core body which are sequentially connected in series through a cooling liquid pipeline;

the first outlet end of the first three-way valve is connected with one end of the warm air core body, the other end of the warm air core body is respectively connected with the outlet end of the water mixing device and the inlet end of the second water pump, and the second outlet end of the first three-way valve is connected with the water mixing device.

Further, the device also comprises a motor loop;

the motor loop comprises a first expansion kettle, a first water pump, a charger and a motor which are sequentially connected in series through a cooling liquid pipeline;

the inlet end of the first expansion kettle is connected with the outlet end of the water mixing device, and the outlet end of the motor is connected with the inlet end of the water mixing device.

Further, still include: a low temperature heat sink;

the motor loop further comprises a third three-way valve, the inlet end of the third three-way valve is connected with one end of the motor, the first outlet end of the third three-way valve is connected with the inlet end of the water mixing device, the second outlet end of the third three-way valve is connected with one end of the low-temperature radiator, and the other end of the low-temperature radiator is connected with the inlet end of the water mixing device.

Further, the motor circuit further includes: and the water inlet end of the third one-way valve is respectively connected with the other end of the low-temperature radiator and the second outlet end of the third three-way valve.

Further, still include: an air conditioning circuit;

the air conditioning loop comprises a liquid-gas separator, a compressor, an internal condenser, a normally open solenoid valve, an external heat exchanger, a second one-way valve, a first electronic expansion valve and an evaporator which are sequentially connected in series.

Further, the air conditioning circuit further includes: one end of the second electronic expansion valve is connected with the outlet of the second one-way valve, the other end of the second electronic expansion valve is connected with the inlet of the cooler, and the outlet of the cooler is connected with the liquid-gas separator.

Further, the air conditioning circuit further includes: the third electronic expansion valve is connected with the normally open electromagnetic valve in parallel; one end of the first normally closed solenoid valve is connected between the evaporator and the normally open solenoid valve, and the other end of the first normally closed solenoid valve is connected with one end of the second electronic expansion valve.

Further, the air conditioning circuit further includes: and one end of the second normally closed electromagnetic valve is connected with the external heat exchanger, and the other end of the second normally closed electromagnetic valve is connected with the liquid-gas separator.

Furthermore, the first three-way valve, the second three-way valve, the third three-way valve, the first one-way valve and the second one-way valve are all adjustable flow control valves.

In another aspect, the invention provides a new energy automobile, which is provided with any one of the new energy automobile battery heating systems.

The implementation of the invention has the following beneficial effects:

the new energy automobile battery heating system has clear and uncomplicated schematic diagram, few used parts and low cost, and simultaneously has the functions of refrigerating and heating of a heat pump air conditioning system of a passenger compartment, cooling and heating of a battery, cooling and heat recovery of a motor, defrosting and deicing of an external evaporator and the like. And can improve the energy utilization rate and the safety factor, etc.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a new energy vehicle battery heating system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another new energy vehicle battery heating system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery heating system of another new energy vehicle according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a battery heating system of a new energy vehicle according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery heating system of a new energy vehicle according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a passenger compartment refrigeration circuit according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a structure of an air conditioning circuit for cooling a battery according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of an air conditioning circuit for simultaneously cooling a battery and a passenger compartment according to an embodiment of the present invention;

fig. 9 is a schematic structural view of the passenger compartment in which conventional heating and chiller heat recovery heating are simultaneously operated;

fig. 10 is a schematic structural diagram of defrosting and deicing of an external evaporator.

The water heater comprises a water tank, a water pump, a charger, a motor, a water mixing device and a warm air core body, wherein the water tank comprises 1-a first expansion water kettle, 2-a first water pump, 3-a charger, 4-a motor, 5-a water mixing device and 30-a warm air core body; 6-third one-way valve, 7-second water pump, 8-heater, 9-first three-way valve, 10-second three-way valve, 11-second expansion water kettle, 12-third water pump, 13-battery pack, 14-cooler, 15-first one-way valve, 16-low temperature radiator, 17-third three-way valve, 18-liquid gas separator, 19-compressor, 20-internal condenser, 21-normally open solenoid valve, 22-external heat exchanger, 23-second one-way valve, 24-first electronic expansion valve, 25-evaporator, 26-second electronic expansion valve, 27-third electronic expansion valve, 28-first normally closed solenoid valve, 29-second normally closed solenoid valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

It should be noted that when an element is referred to as being "connected" to another element, it can be either a circuit connection or a communication connection.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Fig. 1 is a schematic structural diagram of a new energy vehicle battery heating system according to an embodiment of the present invention, and as shown in fig. 1, the present invention provides a new energy vehicle battery heating system, which includes a battery loop, a water mixing device 5, a first check valve 15, and a passenger compartment heating loop;

the battery loop comprises a second three-way valve 10, a second expansion kettle 11, a third water pump 12, a battery pack 13 and a cooler 14 which are connected in series through a cooling liquid pipeline in sequence;

the water inlet end of the first one-way valve 15 is connected with the cooler 14 and one inlet end of the second three-way valve 10, and the other end of the first one-way valve 15 is connected with the inlet end of the water mixing device 5; the outlet end of the water mixing device 5 is connected with the other inlet end of the second three-way valve 10;

the passenger compartment heating loop comprises a second water pump 7, a heater 8, a first three-way valve 9 and a warm air core body 30 which are sequentially connected in series through a cooling liquid pipeline;

the first outlet end of the first three-way valve 9 is connected with one end of the warm air core body 30, the other end of the warm air core body 30 is respectively connected with the outlet end of the water mixing device 5 and the inlet end of the second water pump 7, and the second outlet end of the first three-way valve 9 is connected with the water mixing device 5.

The water mixing device 5(HUB) is used to mix the coolant in the motor circuit and the coolant circuit through the warm-dispensing core, the HUB: the effect is that the coolant that gets into the HUB with the battery return circuit coolant that gets into the HUB mixes, and the higher temperature motor 4 coolant mixes with the lower battery coolant of temperature continuously like this.

For example, when the passenger compartment needs to be heated by the heater 8 alone, the first three-way valve 9 may be controlled to open the first outlet end and close the second outlet, so that the second water pump 7, the heater 8, the three-way valve, and the heater core 30 form a single heat circulation loop.

Specifically, the battery pack 13 is used for providing electric power for the new energy automobile, the battery pack 13 may be provided with a plurality of battery packs, the battery pack 13 and the second water pump 7 are connected by a cooling liquid pipeline, and the cooling liquid pipeline is connected with the cooling fins of the battery pack 13 so as to heat or cool the battery pack 13. The second three-way valve 10 is a two-in one-out type three-way valve. The cooler 14 may be a heat exchanger or a chiller.

For example, the battery circuit may be self-cycling when the battery pack 13 needs to maintain a constant temperature.

When the battery pack 13 needs to be heated, the heater 8 heats the battery pack 13, a heating loop is formed by the second water pump 7, the heater 8, the first three-way valve 9 and the water mixing device 5, and then the cooling liquid in the water mixing device 5 is heated, and the battery loop is connected with the heating loop in parallel, so that the heating of the battery pack 13 by the heater 8 can be realized; the second step is as follows: the battery pack 13 is heated by heat generated by the motor 4, the motor loop is connected with the battery loop in parallel through the water mixing device 5, and the heat generated by the motor 4 is transmitted to the battery pack 13 through cooling liquid, so that the battery pack 13 is heated.

When the battery pack 13 needs to be cooled, the heating loop can enlarge the cooling liquid capacity of the battery loop when the heater 8 does not work, and the cooling efficiency of the battery pack 13 is increased; the second step is as follows: when the heat that motor 4 produced is less than group battery 13 heat, the motor return circuit passes through mixing water equipment 5 with the battery return circuit and connects in parallel, and the heat that group battery 13 produced can be passed through mixing water equipment 5 and is given the motor return circuit, increase group battery 13 cooling efficiency.

It is to be understood that the heat of the battery pack may also be cooled or recovered by the cooler 14. The temperature of the battery loop is high, the compressor 19 needs to be started, heat is absorbed from the battery loop through the beller, and the purpose of reducing the temperature of the battery loop is achieved, and at the moment, the passenger compartment may or may not have a refrigeration requirement.

When the temperature of the battery loop is higher than 10 ℃ relative to the ambient temperature, the passenger compartment can be heated by recovering the heat of the battery, and the passenger compartment has a heating requirement.

On the basis of the above embodiment, in an embodiment of the present specification, fig. 2 is a schematic structural diagram of another new energy vehicle battery heating system provided in the embodiment of the present invention, as shown in fig. 2, further including a motor loop;

the motor loop comprises a first expansion kettle 1, a first water pump 2, a charger 3 and a motor 4 which are connected in series through a cooling liquid pipeline in sequence;

the inlet end of the first expansion kettle 1 is connected with the outlet end of the water mixing device 5, and the outlet end of the motor is connected with the inlet end of the water mixing device 5.

For example, when the motor 4 needs to be heated by the heater 8 alone, the third one-way valve 6 and the first three-way valve 9 may be controlled, so that the second water pump 7, the heater 8, the three-way valve, the water mixing device 5, the first expansion kettle 1, the first water pump 2, the charger 3, the motor 4, the water mixing device 5, and the second water pump 7 form an individual heat circulation loop for the heater 8 to heat the motor 4.

Specifically, the first expansion water bottle 1 is used for when the engine operates, coolant liquid can be in the motor loop and incessantly circulate, can flow through first expansion water bottle 1 midway, if the pressure is too high, or the coolant liquid is excessive, unnecessary gas and coolant liquid will flow out from the bypass water course of first expansion water bottle 1, avoid cooling system pressure too high, cause the bad consequence of violence pipe. The first water pump 2 is used for driving the directional flow of the cooling liquid in the cooling liquid pipeline. The charger 3 is used to provide voltage or current conversion for the motor 4. The motor 4 is used to drive the vehicle.

It should be noted that the charger 3, the motor 4, and the warm air core 30 are not directly connected to the coolant pipeline, but are all parts that can be heated or cooled by the coolant pipeline. It is to be understood that the cooling liquid is not particularly limited in the embodiments of the present specification, and may be set according to the actual situation. In some possible embodiments, the electric machine 4 may comprise a front electric machine for driving the front wheels of the vehicle and a rear electric machine for driving the rear wheels of the vehicle.

On the basis of the above embodiment, in an embodiment of this specification, fig. 3 is a schematic structural diagram of a new energy vehicle battery heating system provided in an embodiment of the present invention, as shown in fig. 3, further including: a low temperature heat sink 16;

the motor loop further comprises a third three-way valve 17, wherein an inlet end of the third three-way valve 17 is connected with one end of the motor 4, a first outlet end of the third three-way valve 17 is connected with an inlet end of the water mixing device 5, a second outlet end of the third three-way valve 17 is connected with one end of the low-temperature radiator 16, and the other end of the low-temperature radiator 16 is connected with an inlet end of the water mixing device 5.

On the basis of the above embodiment, in an embodiment of this specification, fig. 4 is a schematic structural diagram of a battery heating system of a new energy vehicle according to an embodiment of the present invention, and as shown in fig. 4, the motor circuit further includes: and a water inlet end of the third one-way valve 6 is connected to the other end of the low-temperature radiator 16 and a second outlet end of the fourth three-way valve 17 respectively.

Specifically, the first expansion kettle 1 can be provided with a water guide pipe, the water guide pipe is connected with the first expansion kettle 1 and the low-temperature radiator 16, when the pressure of the first expansion kettle 1 is too large, the water guide pipe can keep the pressure balance of the first expansion, and danger caused by the too large pressure is avoided.

For example, when the motor 4 needs to be cooled, the cooling may be performed by the low-temperature radiator 16, and the specific cooling circuit may be: the device comprises a first expansion kettle 1, a first water pump 2, a charger 3, a motor 4, a third three-way valve 17, a low-temperature radiator 16, a third one-way valve 6 and the first expansion kettle 1.

When both the motor 4 and the battery need to be cooled, they can be cooled simultaneously by the low-temperature radiator 16, and the specific cooling loop may be: the water mixing device comprises a first expansion kettle 1, a first water pump 2, a charger 3, a motor 4, a low-temperature radiator 16, a water mixing device 5, a second three-way valve 10, a second expansion kettle 11, a second water pump 7, a battery pack 13, a cooler 14, a first one-way valve 15, the water mixing device 5 and the first expansion kettle 1. If the temperature of the motor loop is high at this time, the loop cannot be opened, because the temperature of the battery loop is increased due to the hot water in the motor loop, which may cause irreversible damage to the battery.

When both the motor 4 and the battery need to be cooled, they can be cooled simultaneously by the cooler 14, and the specific cooling loop can be: the water mixing device comprises a first expansion kettle 1, a first water pump 2, a charger 3, a motor 4, a water mixing device 5, a second three-way valve 10, a second expansion kettle 11, a second water pump 7, a battery pack 13, a cooler 14, a first one-way valve 15, a water mixing device 5 and the first expansion kettle 1. If the temperature of the motor loop is high at this time, the loop cannot be opened, because the temperature of the battery loop is increased due to the hot water in the motor loop, which may cause irreversible damage to the battery.

When the motor 4 and the battery are connected in series with the cooler 14 for heat recovery, the environment temperature is generally lower in the case, the heat recovered by the heat recovery is mainly used for heating the heat pump of the passenger compartment, and the water pump can absorb heat from the motor 4 and the battery through the chiller.

Exemplarily, when the passenger compartment does not need to be heated by heat energy generated by the motor 4, the third one-way valve 6 may be controlled to be closed, so that the cooling liquid does not flow through the water mixing device 5, and the self-circulation of the motor loop is realized, thereby achieving the function of cooling the motor 4. Under the condition, the motor loop is in a self-heat-insulation state, the heat of the motor loop cannot be recycled, and the cooling liquid of the motor loop does not need to be cooled through a radiator.

When the passenger compartment has a small amount of heating requirements, the heating requirement of the passenger compartment can be met only by heating the warm air core body 30 by using the heat of the motor loop and controlling the third one-way valve 6 to be opened without starting a heat pump for heating.

When the passenger compartment has no heating requirement, but the temperature setting of the front and the secondary drives is different, the heat of the motor 4 is required to be used for heating the warm air core body 30 at this time, the third one-way valve 6 is controlled to be opened, the temperature of cold air passing through the warm air core body 30 is adjusted by adjusting the position of the temperature air door, so that the adjusting effect of different temperature zones is realized, and meanwhile, the motor loop can also be cooled.

The embodiment of the specification provides a new energy automobile battery heating system, can realize utilizing the heat that motor 4 produced to heat passenger cabin when motor 4 generates heat, has avoided thermal loss, has improved the availability factor of the energy, has reduced the loss of whole car energy, improves new energy automobile's driving mileage simultaneously to the system structure that this application provided is clear, with low costs, safer.

On the basis of the above embodiments, in an embodiment of this specification, as shown in fig. 5, fig. 5 is a schematic structural diagram of a battery heating system of a new energy vehicle according to an embodiment of the present invention, further including: an air conditioning circuit;

the air conditioning loop comprises a liquid-gas separator 18, a compressor 19, an internal condenser 20, a normally open electromagnetic valve 21, an external heat exchanger 22, a second one-way valve 23, a first electronic expansion valve 24 and an evaporator 25 which are sequentially connected in series.

On the basis of the above embodiments, in an embodiment of the present specification, the air conditioning circuit further includes: and one end of the second electronic expansion valve 26 is connected with the outlet of the second one-way valve 23, the other end of the second electronic expansion valve 26 is connected with the inlet of the cooler 14, and the outlet of the cooler 14 is connected with the liquid-gas separator 18.

On the basis of the above embodiments, in an embodiment of the present specification, the air conditioning circuit further includes: a third electronic expansion valve 27 and a first normally closed solenoid valve 28, wherein the third electronic expansion valve 27 is connected with the normally open solenoid valve 21 in parallel; one end of the first normally closed solenoid valve 28 is connected between the evaporator 25 and the normally open solenoid valve 21, and the other end of the first normally closed solenoid valve 28 is connected with one end of the second electronic expansion valve 26.

On the basis of the above embodiments, in an embodiment of the present specification, the air conditioning circuit further includes: and one end of the second normally closed electromagnetic valve 29 is connected with the external heat exchanger 22, and the other end of the second normally closed electromagnetic valve 29 is connected with the liquid-gas separator 18.

Fig. 6 is a schematic structural diagram of a passenger compartment refrigeration circuit provided by the embodiment of the invention; when the passenger compartment is refrigerated, the compressor 19 is turned on to refrigerate via the evaporator 25.

Exemplarily, as shown in fig. 7, fig. 7 is a schematic structural diagram of an air conditioning circuit for cooling a battery according to an embodiment of the present invention; when the battery needs to be cooled down quickly, the refrigeration circuit of fig. 7 is turned on, at which time the evaporator 25 is not operating, i.e. the passenger compartment has no refrigeration request.

Exemplarily, as shown in fig. 8, fig. 8 is a schematic structural diagram of an air conditioning circuit for cooling a battery and a passenger compartment simultaneously, where the passenger compartment is cooled and the battery is cooled, and in this case, the passenger compartment has a cooling requirement and the battery also has a cooling requirement, and therefore, the air conditioning circuit is turned on simultaneously to meet the cooling requirements of the passenger compartment and the battery.

In some possible embodiments, the air conditioning circuit can also provide conventional heating of the passenger compartment by releasing heat from the internal condenser 20 and absorbing heat from the environment by the external evaporator 25.

In some possible embodiments, the teller may also perform heat recovery on the passenger compartment, and the specific loop may be: liquid-gas separator 18, compressor 19, internal condenser 20, third electronic expansion valve 27, cooler 14, liquid-gas separator 18.

In some possible embodiments, as shown in fig. 9, fig. 9 is a schematic structural diagram of the passenger compartment normal heating and the chiller heat recovery heating which operate simultaneously, in which case the external evaporator 25 and the chiller evaporator 25 are turned on to absorb heat and the internal condenser 20 releases heat, so as to achieve the purpose of heating the passenger compartment.

In some possible embodiments, as shown in fig. 10, fig. 10 is a schematic structural view of defrosting and deicing of external evaporator 25, and external evaporator 25 is used for defrosting and deicing, which can be divided into two cases:

1 after a vehicle is parked in an open environment for a period of time, because of weather, a thicker ice layer exists on the vehicle, at this time, the surfaces of an external evaporator 25 and a radiator also have the ice layer, at this time, the heating of a conventional heat pump cannot be started, because the external evaporator 25 is covered by the ice layer, air cannot exchange heat through the ice layer, so the vehicle needs to be deiced firstly, the principle of deicing is that the external evaporator 25 is used as a condenser, the condenser emits heat to the ice layer on the surface, at this time, a chiller is used as the evaporator 25 to absorb heat of a motor 4 or a battery from a cooling loop, or simultaneously absorb heat of the battery of the motor 4, the ice layer melts slowly, after the deicing is completed, the conventional heat pump can be started to heat through an internal condenser 20, the external evaporator 25 absorbs heat from ambient air, and if the deicing function is not available, the vehicle cannot start the heat pump to heat a passenger compartment, only the heater (PTC) can be turned on, resulting in increased energy consumption.

2 vehicle is at the in-process of traveling, under the environment about 2 ℃ of low temperature in winter, when external humidity is great, the surface can slowly frosting after evaporimeter 25 operation a period, evaporimeter 25 frosts to certain extent can influence the heat absorption of evaporimeter 25 to lead to compressor 19 suction pressure to hang down excessively, trigger compressor 19 low pressure protection and shut down, passenger cabin heats and can only open heater (PTC) after stopping and heat the passenger cabin, the energy consumption can increase this moment, continuation of the journey mileage can reduce. At the moment, the operation mode is switched to the defrosting and deicing mode, frost can be removed in a short time, and the operation mode is switched to the conventional heat pump mode for heating after the frost is removed, so that the heater (PTC) is not required to be started for heating, the heating requirement of the passenger compartment is met, and the energy consumption is lower.

On the basis of the above embodiments, in an embodiment of the present disclosure, the third check valve 6, the first three-way valve 9, the second three-way valve 10, the third three-way valve 17, the first check valve 15, the normally open solenoid valve 21, the second check valve 23, the first electronic expansion valve 24, the second electronic expansion valve 26, the third electronic expansion valve 27, the first normally closed solenoid valve 28, and the second normally closed solenoid valve 29 are all adjustable flow control valves.

And a low-temperature radiator 16, which mainly plays a role in cooling the motor loop or the battery loop.

The internal condenser 20 is passed through both the cooling and heating modes.

The outside heat exchanger 22 is used as a condenser in cooling and as an evaporator 25 in heating.

The evaporator 25 is opened when the passenger compartment has a refrigeration demand, and mainly plays a role in refrigeration and dehumidification.

A Chiller: the heat exchanger is used for heat exchange between the cooling liquid and the refrigerant by passing the refrigerant through one side and the cooling liquid through the other side, and mainly aims at cooling the cooling liquid or recovering heat in the cooling liquid.

The liquid-gas separator 18(ACCU) mainly functions to absorb the liquid refrigerant in the pipeline, ensure that the refrigerant entering the compressor 19 is gaseous refrigerant, and prevent the compressor 19 from liquid impact.

Heater 8 (HVH): for liquid heating (heater (PTC)), its main function is to provide a heat source for the passenger compartment or battery during winter.

In another case, the external evaporator 25 is frozen, the heat pump absorbs heat from the motor 4 and the battery through the chiller, and the external evaporator 25 performs deicing. The external evaporator 25 corresponds to an outdoor condenser in the figure, and can be used for both heating and cooling the system by using the evaporator 25 and the condenser.

The invention relates to a new energy automobile battery heating system which can be used in a PMA platform project or other platforms of electric vehicle heat distribution pump systems.

The new energy automobile battery heating system has the innovation points of clear and uncomplicated schematic diagram, few used parts and low cost, and simultaneously has the functions of refrigerating and heating of the passenger compartment heat pump air conditioning system, battery cooling and heating, motor 4 cooling and heat recovery, defrosting and deicing of the external evaporator 25 and the like.

And the coolant loop that the invention provides has at least three, it is the electrical machinery loop separately, battery loop and warm braw loop, every loop can operate alone and is not interfered by other loop, every two loops can mix alone and is not influenced by another loop too, when the electrical machinery loop three-way valve or battery loop three-way valve is invalid, can pass the three-way valve of the control battery loop or electrical machinery loop, and achieve the purpose that the hot water of the electrical machinery 4 can't enter the battery loop. The only failure condition is that the three-way valve of the motor circuit and the three-way valve of the battery circuit fail simultaneously. If the failure rate of the three-way valve is 1%, the probability of two three-way valves failing simultaneously becomes one in ten thousandth.

The functional safety is a very important problem of a pure electric vehicle, mainly considering that hot water with higher temperature in a motor loop can not enter a battery, and the functional safety is divided into the following aspects:

1. because the battery has the requirement of the temperature of the inlet water, the motor 4 can be triggered to reduce the power after the temperature of the inlet water exceeds 45 ℃, and the satisfaction degree of passengers can be reduced.

2. After the temperature of the inlet water exceeds 50 ℃, the power of the motor 4 can be triggered to be cut off, so that the power of the vehicle is lost, and if the condition that the power of the vehicle is lost occurs during high-speed traveling, the safety risk is very high.

3. After the temperature of the inlet water exceeds 50 ℃, if the power of the motor 4 is not cut off, the temperature of the battery loop can be continuously increased due to the continuous running of the vehicle, and the risk of burning and even explosion due to the overhigh temperature of the battery can be caused.

Considering that the parts cannot be made one hundred percent non-failure, in order to meet the requirement of functional safety, when the third check valve 6 of the motor loop is damaged at the position of entering the HUB, the hot water in the motor 4 can be prevented from entering the battery by adjusting the second three-way valve 10 of the battery loop to the position of small circulation. Unless the second three-way valve 10 of the battery circuit is also damaged, hot water from the motor 4 will not be caused to enter the battery.

If the probability of one water valve being damaged is one percent, the probability of two water valves being damaged simultaneously is one ten thousandth.

Therefore, the new energy automobile heat pipeline system provided by the application equivalently reduces the risk of battery thermal runaway by 100 times, and improves the safety of vehicles.

In another aspect, the invention provides a new energy automobile, which is characterized in that the new energy automobile is provided with any one of the new energy automobile battery heating systems.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications and variations may be made therein by those of ordinary skill in the art within the scope of the present invention.