WO2022222102A1

WO2022222102A1 - Thermal management system, heating method and device, vehicle, and storage medium

Info

Publication number: WO2022222102A1
Application number: PCT/CN2021/088995
Authority: WO
Inventors: 朱冬清; 党华
Original assignee: 浙江智马达智能科技有限公司
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-10-27
Also published as: CN116710299A

Abstract

A thermal management system, a heating method and device, a vehicle, and a storage medium. The thermal management system comprises: a compressor, an internal condenser, and a heat exchanger; the compressor, the internal condenser, and the heat exchanger are connected in series by means of a pipeline to form a heat transfer loop; a cooling medium for transferring heat is provided in the heat transfer loop; the compressor is configured to drive the cooling medium to flow in the heat transfer loop; the internal condenser is provided in a passenger cabin, and the internal condenser is configured to transfer heat carried by the cooling medium into the passenger cabin; the heat exchanger is connected to a heat source, and the heat source is used for transferring heat to the cooling medium passing through the heat exchanger; the heat source at least comprises a battery pack.

Description

A thermal management system, heating method, device, vehicle and storage medium

technical field

The present application relates to the technical field of vehicle thermal management, and in particular, to a thermal management system, a heating method, a device, a vehicle, and a storage medium.

Background technique

Energy conservation and environmental protection is a common theme advocated by the world today. With the global energy crisis and environmental pollution becoming more and more serious, electric vehicles have become the trend of future development. The emergence of pure electric vehicles can effectively alleviate the problems of oil crisis and serious environmental pollution to a certain extent. Electric vehicles have opened up the clean energy vehicle market, and many users have begun to choose electric vehicles as their main means of transportation. Electric vehicles have limited power due to space constraints and battery technology. The poor battery life of electric vehicles is the main problem that currently restricts the development of the electric vehicle industry.

At present, in the existing air conditioning and heating systems of electric vehicles, the heat pump energy-saving technology is based on the external low temperature ambient air from the heat source. At this low temperature, the heat pump system needs to control the system pressure to a relatively low range to ensure that the system can be operated from low temperature. The air absorbs enough heat, so that the energy-saving efficiency of the heat pump system is relatively low, and the power consumption is relatively large. The heating of the passenger compartment consumes a large amount of electric energy of electric vehicles, which seriously affects the driving range of pure electric vehicles.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is that the existing heat pump energy-saving technologies are all based on the external low temperature ambient air of the heat source source, and the power consumption is relatively large.

In order to solve the above technical problems, in a first aspect, the embodiments of the present application disclose a thermal management system for an electric vehicle, including: a compressor, an internal condenser and a heat exchanger;

The compressor, the internal condenser and the heat exchanger are connected in series through pipelines to form a heat transfer loop;

The heat transfer loop is provided with a cooling medium for transferring heat;

the compressor is used to drive the refrigerant medium to flow in the heat transfer circuit;

the internal condenser is arranged in the passenger compartment, and the internal condenser is used for transferring the heat carried by the cooling medium into the passenger compartment;

the heat exchanger is connected to a heat source for transferring heat to the refrigerant medium passing through the heat exchanger;

The heat source includes at least a battery pack.

Further, the thermal management system further includes a battery pack heat storage circuit, the battery pack heat storage circuit is used to transfer the heat generated by the high-voltage components to the battery pack, and the battery pack stores the heat.

Further, the battery pack heat storage circuit includes a water pump, a high-voltage component and the battery pack;

The water pump, the high-voltage component and the battery pack are connected in series through a pipeline to form the battery pack heat storage circuit;

The battery pack heat storage circuit is provided with cooling liquid for transferring heat;

The water pump is used to drive the cooling liquid to flow in the battery pack heat storage circuit.

Further, the thermal management system further includes a cooling circuit for cooling the high-voltage components and the battery pack;

The cooling circuit includes the water pump, the high-pressure component, the three-way valve, the first cooling circuit and the second cooling circuit formed by the battery pack and the radiator;

The water pump, the high-pressure component, the first interface and the second interface of the three-way valve, and the radiator are connected in series through a pipeline to form the first cooling circuit;

The water pump, the high-pressure component, the first interface and the third interface of the three-way valve, and the radiator are connected in series through a pipeline to form the second cooling circuit.

Further, the heat source further includes a heat exchanger for absorbing heat from the outside air and transferring the heat to the cooling medium flowing through the heat exchanger.

Further, the thermal management system further includes an expansion valve connected to the heat transfer circuit;

The expansion valve is arranged between the internal condenser and the heat exchanger, and the cooling medium flows from the internal condenser to the heat exchanger after passing through the expansion valve.

In a second aspect, the embodiments of the present application disclose a method for heating a passenger compartment of an electric vehicle, and the method is applied to the thermal management system of the electric vehicle as described above;

The method includes:

Receive heating requests from the passenger compartment;

determining the thermal storage temperature of the battery pack according to the heating request;

If the thermal storage temperature is greater than a threshold value, the heat exchanger uses the battery pack as a heat source to transfer the heat of the battery pack to the passenger compartment.

In a third aspect, an embodiment of the present application discloses a passenger compartment heating device for an electric vehicle, the device comprising:

The receiving module is used to receive the heating request of the passenger compartment;

a determining module, configured to determine the thermal storage temperature of the battery pack according to the heating request;

The control module is configured to use the battery pack as a heat source for the heat exchanger to transfer the heat of the battery pack to the passenger compartment if the thermal storage temperature is greater than a threshold value.

In a fourth aspect, an embodiment of the present application discloses a vehicle including the thermal management system for an electric vehicle as described above.

In a fifth aspect, an embodiment of the present application discloses a computer-readable storage medium, where at least one instruction or at least one program is stored in the storage medium, and the at least one instruction or at least one program is loaded and executed by a processor to achieve The passenger compartment heating method of the electric vehicle as described above.

The thermal management system, heating method, device, vehicle, and storage medium provided by the embodiments of the present application have the following technical effects:

The thermal management system of the electric vehicle described in the embodiment of the present application utilizes the characteristics of the battery pack, which has good thermal insulation performance, high mass and specific heat, and considers the battery pack as a heat storage and thermal insulation component, and recovers the heat generated by the high-voltage components. Store in the battery pack. When there is a need for heating in the passenger compartment, the heat pump system uses the battery pack as a heat source to absorb heat to supply the passenger compartment for heating. In this way, the energy-saving work efficiency of the heat pump system can be improved, and the power consumption of the whole vehicle can be reduced. Moreover, the risk of the heat exchanger being frosted and unable to work when the heat pump system absorbs the heat of the outside air is avoided. In addition, using the battery pack as a heat source improves the energy-saving efficiency of the electric vehicle heat pump system, avoids waste of heat generated by high-voltage components, reduces the power consumption of electric vehicles in low-temperature environments, and increases the low-temperature cruising range of the vehicle.

Description of drawings

In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or in the prior art, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a thermal management system for an electric vehicle provided by an embodiment of the present application;

2 is a schematic structural diagram of a battery pack heat storage and cooling circuit provided by an embodiment of the present application;

3 is a schematic structural diagram of a cooling circuit provided by an embodiment of the present application;

4 is a schematic flowchart of a method for heating a passenger compartment of an electric vehicle according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a passenger compartment heating device of an electric vehicle provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Electric vehicles are developing rapidly and gradually replacing traditional fuel vehicles, and more and more companies are also investing a lot of manpower and material resources into the research and production of electric vehicles. However, the battery capacity of electric vehicles is limited. In winter, the air-conditioning system consumes a considerable amount of electricity to heat the passenger compartment. Taking into account the battery life of electric vehicles, it is even more necessary for the air conditioning system to be energy-efficient and efficient. In addition, the heat generated when the high-voltage components on the current pure electric vehicle work is basically based on the use of waste heat when the battery has a heating demand. In this way, when the battery is not in demand, the heat generated by the high-voltage components will be lost through the heat sink for heat dissipation, resulting in wasted energy.

An embodiment of the present application provides a thermal management system for an electric vehicle. FIG. 1 is a schematic structural diagram of a thermal management system for an electric vehicle provided by an embodiment of the present application. As shown in FIG. 1 , the system includes: a compressor, an internal Condenser and heat exchanger. The compressor, internal condenser and heat exchanger are connected in series by piping to form a heat transfer loop. A cooling medium for transferring heat is provided in the heat transfer circuit. The compressor is used to drive the flow of the refrigerant medium in the heat transfer circuit. An internal condenser is provided in the passenger compartment, and the internal condenser is used to transfer the heat carried by the refrigerant medium into the passenger compartment. The heat exchanger is connected to a heat source for transferring heat to the refrigerant medium passing through the heat exchanger. The heat source includes at least the battery pack.

In the embodiment of the present application, the thermal management system is mainly based on the existing thermal management system, which is improved for the heating of the passenger compartment, so as to improve the energy-saving work efficiency of the heat pump system. As shown in Fig. 1, in the thermal management system, the compressor, the internal condenser and the heat exchanger are connected in series to form a heat transfer loop through pipelines. The pipeline is filled with a circulating cooling medium, and the cooling medium is used to transfer heat. The cooling medium needs to have excellent thermodynamic properties so that it can operate with high cycle efficiency in a given temperature region. Specifically, the critical temperature of the cooling medium is higher than the condensation temperature, the saturation pressure corresponding to the condensation temperature is not too high, the standard boiling point is low, the fluid specific heat capacity is small, the adiabatic index is low, and the heating capacity per unit volume is large. Optionally, the cooling medium is difluoromonochloromethane, tetrafluoroethane, isobutane, ammonia, Freon and the like.

In the embodiment of the present application, as shown in FIG. 1 , the compressor is a power device of the heat transfer circuit, and the compressor is started when the heat pump system is working to drive the refrigerant medium in the heat transfer circuit to flow and operate. The internal condenser is arranged in the passenger compartment of the vehicle for heat exchange with the passenger compartment. The heat exchanger is connected to the heat source to transfer the heat emitted by the heat source to the refrigerant medium in the circuit. The way of realizing heat transfer between the heat exchanger and the heat source is preferably the way of conduction or radiation. As an optional embodiment, the heat exchanger is connected to the heat source through a pipeline, and a cooling liquid, such as water, ethylene glycol, etc., is arranged in the pipeline. The cooling liquid absorbs heat from the heat source, and then is exchanged. Heat exchange is carried out at the heater to transfer heat to the cooling medium in the heat transfer loop. In some embodiments, the heat source can also be directly connected to the heat transfer loop through a pipeline, so as to reduce the heat loss during the heat transfer process. In other embodiments, the thermal management system further includes an expansion valve connected to the heat transfer loop. The expansion valve is arranged between the internal condenser and the heat exchanger, and the cooling medium flows from the internal condenser to the heat exchanger after passing through the expansion valve. The cooling medium after passing through the internal condenser flows to the expansion valve, and the expansion valve makes the high-temperature and high-pressure cooling medium in the heat transfer circuit throttle into low-temperature and low-pressure wet steam, so that the cooling medium can absorb heat at the heat exchanger outlet. The carried heat is then recirculated to the internal condenser, thereby achieving the effect of heating the passenger compartment.

In the embodiment of the present application, the heat source connected to the heat exchanger includes a battery pack. From a thermal point of view, the battery pack has good temperature characteristics. First of all, the battery pack includes layers of shells, and is equipped with a liquid cooling plate inside, which has better thermal insulation performance. Secondly, the command and specific heat of the battery pack are relatively large. Therefore, the battery pack can store a large amount of heat under the premise of ensuring its normal operation. Furthermore, the battery pack also generates heat during operation. Based on the above characteristics of the battery pack, the liquid cooling plate of the battery pack is connected to the heat exchanger by setting a pipeline, so that the heat stored in the battery pack is transferred from the cell to the cooling liquid through the liquid cooling plate, and then to the heat exchange. device. In this way, the battery pack can be used as an auxiliary heat source for heating the passenger compartment. When the battery pack can meet the heating conditions, the passenger compartment can be heated, which can not only avoid heat waste, but also reduce the consumption of battery power for heating in the passenger compartment. the efficiency of the thermal management system.

In the embodiment of the present application, the cooling medium absorbs the heat transferred from the battery pack when passing through the heat exchanger, and under the operation of the cooling medium, the heat is brought to the internal condenser and released to provide hot air to the passenger compartment, so as to provide the passenger compartment with hot air. The purpose of cabin heating is to meet the heating needs of the passenger cabin. After the actual test, the equivalent heat of 2kW·h can supply the passenger compartment to work continuously for 1 hour. And the working efficiency of heat absorption from the battery pack side in the entire thermal management system can be increased from 1.5 to 2.5. The whole system can save 0.6kW·h of electricity when it works for 1 hour. At the same time, it can also avoid the risk that the entire thermal management system cannot work due to the frost on the surface caused by the heat absorption of the heat exchanger from the low temperature environment.

FIG. 2 is a schematic structural diagram of a battery pack heat storage and cooling circuit provided by an embodiment of the present application. As shown in FIG. 2 , the thermal management system further includes a battery pack heat storage circuit, and the battery pack heat storage circuit is used to store the high-voltage components. The heat generated is transferred to the battery pack, which stores the heat.

In the embodiment of the present application, since the battery pack serves as a heat source to provide heat for the heating of the passenger compartment, the heat generated by the battery pack alone may not be able to satisfy the heating of the passenger compartment for a long time. However, motors and other high-voltage components on electric vehicles generate heat during operation. In the prior art, this heat is not effectively utilized, but is dissipated directly or through a cooling system. This results in wasted energy. Based on the aforementioned characteristics of the battery pack, the battery pack can be used as a heat-storing thermal insulation component, and the heat generated by the high-voltage component can be stored in the battery pack. In the embodiment of the present application, the heat generated by the high-voltage components is transferred to the battery pack for storage through the battery pack heat storage circuit.

As an optional embodiment, the battery pack heat storage circuit includes a water pump, a high-voltage component and a battery pack. The water pump, high-voltage components and battery pack are connected in series through pipelines to form a battery pack heat storage circuit. The battery pack heat storage circuit is provided with cooling liquid for transferring heat. The water pump is used to drive the coolant flow in the battery pack heat storage circuit. In this embodiment, the cooling liquid may be a single liquid or a mixed liquid. The cooling liquid can be selected from water, ethylene glycol, etc., of course, it can also be other liquids with larger specific heat. The water pump provides the power for the entire circulation circuit, and the water pump can drive the coolant to circulate in the entire circuit. High-voltage components include motors, charging systems, and more. The coolant flows through the high-voltage components to take away the heat generated when the high-voltage components work, and then the coolant is circulated to the battery pack under the drive of the water pump to release the heat, thereby storing the heat in the battery pack.

In the embodiment of the present application, after all, the main function of the high-voltage system and the battery pack in the vehicle is to ensure the normal operation of the vehicle. When the temperature exceeds its proper working range, the high-voltage system and the battery pack cannot work normally. In order to ensure the normal operation of electric vehicles, the thermal management system also includes a cooling circuit, which is used to cool high-voltage components and battery packs. The temperature of the high-voltage system and battery pack is regulated by setting the cooling circuit. When the heat stored in the battery pack is above its limit, the cooling circuit cools the high-voltage system and the battery pack to keep the vehicle safe.

As an optional implementation, FIG. 3 is a schematic structural diagram of a cooling circuit provided by an embodiment of the present application. As shown in FIG. 3 , the cooling circuit includes a water pump, a high-pressure component, a three-way valve, a battery pack and a radiator. The first cooling circuit and the second cooling circuit. The water pump, the high-pressure component, the first interface and the second interface of the three-way valve, and the radiator are connected in series through pipelines to form a first cooling circuit. The water pump, the high-pressure component, the first interface and the third interface of the three-way valve, and the radiator are connected in series through pipelines to form a second cooling circuit. In this embodiment, the battery pack and the high-voltage components may have different cooling requirements in the actual working process. Therefore, the first cooling circuit and the second cooling circuit are provided to separately cool the high-voltage components and the battery pack for different cooling requirements. Preferably, the first cooling circuit and the second cooling circuit can be connected in parallel through a three-way valve. In this way, on the one hand, the first cooling circuit and the second cooling circuit can share a radiator, which reduces the use of the radiator and reduces the cost. On the other hand, the first cooling circuit and the second cooling circuit can share part of the pipeline, reducing the number of pipelines and simplifying the structure of the cooling circuit.

As another optional embodiment, the existing battery pack cooling circuit can also be retrofitted, so that it can satisfy both the heat storage of the battery pack and the cooling of the high-voltage system and the battery pack. As shown in Figure 2, the circuit includes a water pump, high-pressure components, a radiator, a battery pack, a first three-way valve and a second three-way valve. The water pump, high-pressure components, radiator, and battery pack are connected in sequence through pipelines to form a closed loop. The first three-way valve is set between the high-pressure component and the radiator, and the second three-way valve is set between the radiator and the battery pack. between. The first interface and the second interface of the first three-way valve are respectively connected with the high pressure component and the radiator, and the third interface of the first three-way valve is connected with the first interface of the second three-way valve. The first port of the second three-way valve is also connected to the radiator, the second port of the second three-way valve is connected to the battery pack, and the third port of the second three-way valve is connected to the water pump. In this embodiment, the water pump, the high-pressure component, the first interface and the second interface of the first three-way valve, the radiator, the first interface and the second interface of the second three-way valve, and the battery pack constitute the high-pressure component and the battery pack. The common need for cooling when the circulation loop. The water pump, the high-pressure component, the first and second interfaces of the first three-way valve, the radiator, and the first and third interfaces of the second three-way valve constitute a circulation loop when the high-pressure component needs to be cooled alone. The water pump, the high-pressure component, the first and third ports of the first three-way valve, the first and second ports of the second three-way valve, and the battery pack constitute a circulation loop when the battery pack is thermally stored.

As shown in FIG. 2 , in the above embodiment, the heat generated by the motor and other high-voltage components when the vehicle is running, under the condition that the temperature does not exceed the allowable temperature, is opened through the first three-way valve and the bypass water path bypasses the radiator. , to avoid heat loss when passing through the radiator. At the same time, ensure that the second three-way valve is opened to pass through the battery pack water path, so that the heat generated by the high-voltage components is brought into the battery pack, so that the battery pack temperature rises and absorbs heat and stores it inside. In order to prepare the thermal management system for heating and heating the passenger compartment at any time. The water pump mainly provides flow drive to the entire circuit, so that the coolant flows. After the actual test, the heat stored in the whole circuit can reach 2kW·h equivalent heat when the temperature rise of the entire battery pack is 5°C, so the heat can be stored within the acceptable temperature rise range of the battery pack.

As shown in FIG. 2 , the heat source also includes a heat exchanger for absorbing heat from the outside air and transferring the heat to the cooling medium flowing through the heat exchanger.

In the embodiment of the present application, when the heat provided by the heat source of the battery pack cannot satisfy the heating of the passenger compartment, in order to improve the user experience, other heat sources may also be provided to provide heat. In the embodiment of the present application, a heat exchanger is provided to absorb heat from the external environment, so as to ensure the heating of the passenger compartment. In some embodiments, it is also possible to provide heat for heating the passenger compartment by arranging a PTC heater as a heat source.

The thermal management system of the electric vehicle described in the embodiments of the present application considers the battery pack as a heat storage and heat preservation component based on the temperature characteristics of the battery pack, rather than the battery pack based solely on the heating and cooling requirements of the battery pack. package for thermal management. In this way, the thermal management system can absorb heat from the heat storage circuit of the battery pack with a higher temperature and supply it to the passenger compartment for heating. The thermal management system is more energy-saving and efficient, thereby reducing the power consumption of the electric vehicle and improving the cruising range.

Based on the above thermal management system of an electric vehicle, an embodiment of the present application further provides a method for heating a passenger compartment of an electric vehicle, and the method is applied to the thermal management system of an electric vehicle as described above. 4 is a schematic flowchart of a method for heating a passenger compartment of an electric vehicle provided by an embodiment of the present application. The present specification provides method operation steps such as an embodiment or a flowchart, but based on conventional or non-creative work, it may include more or Fewer operational steps. The sequence of steps enumerated in the embodiments is only one of the execution sequences of many steps, and does not represent the only execution sequence. When an actual system or server product is executed, it can be executed sequentially or in parallel (for example, in a parallel processor or multi-threaded processing environment) according to the embodiments or the methods shown in the accompanying drawings. Specifically, as shown in Figure 4, the method may include:

S401: Receive a heating request of the passenger compartment.

In the embodiment of the present application, when the passenger cabin has a heating demand, the user sends a passenger cabin heating request through the human-computer interaction device in the passenger cabin, and the control system receives the heating request, and then controls the thermal management system according to the heating request. Generally speaking, in the thermal management system, when the conditions are met, the battery pack will be used as a thermal storage and warm-keeping component to collect the heat generated by the operation of the vehicle. The satisfying condition mentioned here means that the temperature of the battery pack does not exceed its normal working temperature range.

S403: Determine the heat storage temperature of the battery pack according to the heating request.

In the embodiment of the present application, the control system first determines the heat storage temperature of the battery pack according to the heating request, so as to determine whether the battery pack stores a lot of heat and meets the conditions for serving as a heat source.

S405: Whether the thermal storage temperature of the battery pack is greater than a threshold.

In the embodiment of the present application, as a most intuitive way to judge whether the battery pack has the condition to serve as a heat source, it is to judge whether the heat storage temperature of the battery pack is greater than a threshold value. Optionally, the threshold is the lowest temperature at which the battery pack works normally.

S407: If the thermal storage temperature is greater than the threshold, the heat exchanger uses the battery pack as a heat source to transfer the heat of the battery pack to the passenger compartment.

In the embodiment of the present application, if the battery pack has the condition to serve as a heat source, the battery pack is preferentially used as the heat source to heat the passenger compartment.

S409: If the heat storage temperature is less than or equal to the threshold value, the heat exchanger uses the heat exchanger as a heat source to conduct the heat of the heat exchanger to the passenger compartment.

In the embodiment of the present application, if the battery pack does not have the conditions to be used as a heat source, in order to meet user requirements, only a heat exchanger can be used as a heat source to heat the passenger compartment.

Based on the above description of the passenger compartment heating method for an electric vehicle, an optional implementation is provided below:

In the operation strategy of the entire thermal management system, the ambient temperature is first detected by the external temperature sensor, and then the external temperature signal of the vehicle is transmitted to the battery management system (BMS) controller. The BMS controller passes the cells in the battery pack. The temperature is used to judge whether the cell needs to be heated at the current ambient temperature. If heating is required, the battery pack is heated by the PTC heater, otherwise the battery pack enters the waste heat utilization mode of the motor and high-voltage components to heat the battery. During this process, the controller controls the three-way valve to transfer heat to the battery pack and store heat in the battery. When there is a heating demand for the heating of the passenger compartment, the thermal management system is turned on and judges whether the heat storage of the battery pack meets the heat absorption demand of the heat pump. Otherwise, the thermal management system will enter the air heat source mode, that is, absorb heat from the cold air to heat the passenger compartment. This heating mode is less efficient than the battery heat source mode system because it absorbs heat from a cooler environment. It meets the heating demand in scenarios where the battery heat source is unavailable.

The embodiment of the present application also discloses a passenger compartment heating device for an electric vehicle. FIG. 5 is a schematic structural diagram of a passenger compartment heating device for an electric vehicle provided by the embodiment of the present application. As shown in FIG. 5 , the device includes:

The receiving module 501 is used for receiving a heating request of the passenger compartment.

The determining module 503 is configured to determine the thermal storage temperature of the battery pack according to the heating request.

The control module 505 is configured to use the battery pack as a heat source for the heat exchanger to transfer the heat of the battery pack to the passenger compartment if the thermal storage temperature is greater than the threshold value.

In the embodiment of the present application, the control module 505 is further configured to use the heat exchanger as a heat source to conduct the heat of the heat exchanger to the passenger compartment if the heat storage temperature is less than or equal to the threshold value.

The embodiment of the present application also discloses a vehicle including the thermal management system of the electric vehicle as described above.

In the embodiment of the present application, the vehicle is an electric vehicle, and the vehicle is provided with a thermal management system. For the specific implementation of the thermal management system, please refer to all the above descriptions of the thermal management system.

Embodiments of the present application further provide an electronic device, the electronic device includes a processor and a memory, and the memory stores at least one instruction, at least one piece of program, code set or instruction set, the at least one instruction, the at least one piece of program, The code set or the instruction set is loaded and executed by the processor to implement the above-mentioned method for heating a passenger compartment of an electric vehicle.

Embodiments of the present application further provide a storage medium, which can be set in an on-board computer to store at least one instruction, at least one program, and a code set for implementing a data transmission method in the method embodiment. Or an instruction set, the at least one instruction, the at least one piece of program, the code set or the instruction set is loaded and executed by the processor to implement the above method for heating a passenger compartment of an electric vehicle.

Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic Various media that can store program codes, such as discs or optical discs.

With the thermal management system, heating method, device, vehicle and storage medium provided by the above application, more heat generated by high-voltage components is recovered in the battery pack for storage and utilization, so that the battery pack can be used as a heat source for heating the passenger compartment, It avoids the risk that the heat exchanger will freeze and fail to work when the thermal management system absorbs heat from the outside air. The thermal management system absorbs heat from the higher temperature battery pack circuit and supplies it to the passenger compartment for heating. The thermal management system has higher energy-saving work efficiency, consumes less power for the entire vehicle, and improves the low-temperature cruising range of the entire vehicle.

It should be noted that: the above-mentioned order of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And the foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and reference may be made to the partial descriptions of the method embodiments for related parts.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, etc.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims

A thermal management system for an electric vehicle, comprising: a compressor, an internal condenser and a heat exchanger;

The compressor, the internal condenser and the heat exchanger are connected in series through pipelines to form a heat transfer loop;

The heat transfer loop is provided with a cooling medium for transferring heat;

the compressor is used to drive the refrigerant medium to flow in the heat transfer circuit;

the internal condenser is arranged in the passenger compartment, and the internal condenser is used for transferring the heat carried by the cooling medium into the passenger compartment;

the heat exchanger is connected to a heat source for transferring heat to the refrigerant medium passing through the heat exchanger;

The heat source includes at least a battery pack.
The thermal management system of an electric vehicle according to claim 1, wherein the thermal management system further comprises a battery pack heat storage circuit, the battery pack heat storage circuit is used to transfer the heat generated by the high-voltage components to the The battery pack stores the heat.
The thermal management system of an electric vehicle according to claim 2, wherein the battery pack heat storage circuit comprises a water pump, a high-voltage component and the battery pack;

The water pump, the high-voltage component and the battery pack are connected in series through a pipeline to form the battery pack heat storage circuit;

The battery pack heat storage circuit is provided with cooling liquid for transferring heat;

The water pump is used to drive the cooling liquid to flow in the battery pack heat storage circuit.
The thermal management system of an electric vehicle according to claim 3, characterized in that, the thermal management system further comprises a cooling circuit, and the cooling circuit is used for cooling the high-voltage components and the battery pack;

The cooling circuit includes the water pump, the high-pressure component, the three-way valve, the first cooling circuit and the second cooling circuit formed by the battery pack and the radiator;

The water pump, the high-pressure component, the first interface and the second interface of the three-way valve, and the radiator are connected in series through a pipeline to form the first cooling circuit;

The water pump, the high-pressure component, the first interface and the third interface of the three-way valve, and the radiator are connected in series through a pipeline to form the second cooling circuit.
The thermal management system of an electric vehicle according to claim 1, wherein the heat source further comprises a heat exchanger for absorbing heat from outside air and transferring the heat to the heat the refrigerant medium of the exchanger.
The thermal management system of an electric vehicle according to claim 5, wherein the thermal management system further comprises an expansion valve, the expansion valve being connected to the heat transfer circuit;

The expansion valve is arranged between the internal condenser and the heat exchanger, and the cooling medium flows from the internal condenser to the heat exchanger after passing through the expansion valve.
A method for heating a passenger compartment of an electric vehicle, wherein the method is applied to the thermal management system of an electric vehicle according to any one of claims 1-6;

The method includes:

Receive heating requests from the passenger compartment;

determining the thermal storage temperature of the battery pack according to the heating request;

If the thermal storage temperature is greater than a threshold value, the heat exchanger uses the battery pack as a heat source to transfer the heat of the battery pack to the passenger compartment.
A passenger compartment heating device for an electric vehicle, characterized in that the device comprises:

The receiving module is used to receive the heating request of the passenger compartment;

a determining module, configured to determine the thermal storage temperature of the battery pack according to the heating request;

The control module is configured to use the battery pack as a heat source for the heat exchanger to transfer the heat of the battery pack to the passenger compartment if the thermal storage temperature is greater than a threshold value.
A vehicle, characterized in that the vehicle comprises the thermal management system of an electric vehicle according to any one of claims 1-6.
A computer-readable storage medium, characterized in that, the storage medium stores at least one instruction or at least one piece of program, and the at least one instruction or at least one piece of program is loaded and executed by a processor to implement the method as claimed in claim 7 method of heating the passenger compartment of an electric vehicle.