Thermal management system, battery heating method and apparatus, and vehicle, device and medium

Abstract

The present application relates to the technical field of vehicles. Provided are a thermal management system, a battery heating method and apparatus, and an electronic device and a storage medium. When it is necessary to heat a battery, a target heat source capable of providing heat for heating is selected from among a plurality of candidate heat sources of the thermal management system in the present application, and by means of a heat pump cycle of a refrigerant loop and a heat exchanger disposed on a coolant side, heat on a refrigerant side or heat recovered from the coolant side are transferred to a battery water pump branch for battery heating. A target heating loop determined on the basis of a target heat source is used to implement heat transfer of the target heat source, thereby recycling heat in different branches / loops in a thermal management system while meeting a battery heating requirement, reducing the energy consumption of battery heating, and ensuring a low-temperature range of a vehicle.

Description

Thermal management system, battery heating method, device, vehicle, equipment and medium

[0001] The present application claims priority to the Chinese patent application No. 202410660936.0, filed on May 24, 2024, and entitled "Thermal management system, battery heating method, device, vehicle, equipment and medium", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to a thermal management system, a battery heating method, a device, a vehicle, an electronic device and a storage medium. BACKGROUND

[0003] At present, in order to improve the low-temperature efficiency of the battery, the battery temperature needs to be guaranteed when the new energy vehicle is running purely at low temperature and charging at low temperature.

[0004] The existing plug-in hybrid electric vehicle or extended-range hybrid electric vehicle usually uses PTC (Positive Temperature Coefficient Thermistor) for battery heating. However, the use of PTC heating has high energy consumption, which seriously affects the efficiency of the pure electric range at low temperature and weakens the pure electric range.

[0005] Therefore, how to propose a thermal management system for a vehicle and a battery heating method based on the thermal management system to reduce the energy consumption of battery heating and guarantee the low-temperature endurance of the vehicle has become a problem to be solved. SUMMARY

[0006] Therefore, it is necessary to provide a thermal management system, a battery heating method, a device, a vehicle, an electronic device and a storage medium to reduce the energy consumption of battery heating and guarantee the low-temperature endurance of the vehicle.

[0007] A thermal management system, comprising a cooling liquid circuit, a refrigerant circuit provided with a water-cooled condenser refrigerant side pipe and a battery cooler refrigerant side pipe;

[0008] The cooling liquid circuit comprises a warm air water pump branch provided with a water-cooled condenser cooling liquid side pipe, a heat exchanger, a battery water pump branch, and a heat recovery circuit provided with a battery cooler cooling liquid side pipe;

[0009] The first end of the one side pipe of the heat exchanger is in communication with the inlet of the battery water pump branch, and the second end of the one side pipe of the heat exchanger is in communication with the outlet of the battery water pump branch;

[0010] The first end of the other side pipe of the heat exchanger is in communication with the inlet of the warm air water pump branch, and the second end of the other side pipe of the heat exchanger is in communication with the outlet of the warm air water pump branch.

[0011] In some embodiments, the refrigerant circuit comprises a compressor, a hot gas bypass branch, a heat pump branch provided with the water-cooled condenser refrigerant side pipe and the battery cooler refrigerant side pipe;

[0012] The hot gas bypass branch and the heat pump branch are respectively connected in parallel at both ends of the compressor.

[0013] In some embodiments, the coolant circuit further comprises an electrically driven water pump branch, and the heat recovery circuit comprises an electrically driven heat recovery circuit;

[0014] The outlet of the electrically driven water pump branch is in communication with the first end of the battery cooler coolant side pipe, and the inlet of the electrically driven water pump branch is in communication with the second end of the battery cooler coolant side pipe, forming the electrically driven heat recovery circuit.

[0015] In some embodiments, the coolant circuit further comprises an air heat exchanger, and the heat recovery circuit further comprises an air source heat recovery circuit;

[0016] The air heat exchanger is connected in series between the inlet of the electrically driven heat pump branch and the second end of the battery cooler coolant side pipe, forming the air source heat recovery circuit.

[0017] In some embodiments, the coolant circuit further comprises a three-way valve;

[0018] The first end of the three-way valve is in communication with the inlet of the electrically driven water pump branch, and the second end of the three-way valve is in communication with the first end of the battery cooler coolant pipe;

[0019] The third end of the three-way valve is in communication with the first end of the air heat exchanger, and the second end of the air heat exchanger is in communication with the inlet of the electrically driven water pump branch.

[0020] In some embodiments, the coolant circuit further comprises an engine waste heat branch and a four-way valve;

[0021] The outlet of the engine waste heat branch is in communication with the first end of the four-way valve, the second end of the four-way valve is in communication with the inlet of the heater water pump branch, the third end of the four-way valve is in communication with the second end of the heat exchanger other side pipe, and the fourth end of the four-way valve is in communication with the inlet of the engine waste heat branch.

[0022] In some embodiments, the coolant circuit further comprises a proportional three-way valve and a coolant bypass branch;

[0023] The inlet of the cooling liquid bypass branch is communicated with the outlet of the warm air water pump branch, the first end of the proportional three-way valve is communicated with the outlet of the cooling liquid bypass branch, the second end of the proportional three-way valve is communicated with the second end of the heat exchanger other side pipeline, and the third end of the proportional three-way valve is communicated with the inlet of the warm air water pump branch.

[0024] A battery heating method based on the thermal management system according to any one of the above embodiments, the method comprising:

[0025] Real-time acquisition of a reference temperature corresponding to the battery, and determination of whether the battery needs to be heated based on the reference temperature;

[0026] If it is determined that the battery needs to be heated, then according to the reference temperature and the current working condition of the battery, a target heat source for battery heating is selected from a plurality of candidate heat sources corresponding to the thermal management system.

[0027] Based on the heat transfer path of the target heat source to the battery water pump branch in the thermal management system, a target heating circuit is determined.

[0028] In some embodiments, the target heat source for battery heating is selected from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and the current working condition of the battery, comprising:

[0029] If the current working condition of the battery is that the battery is in a charging state, it is determined whether the remaining power of the battery exceeds a preset power threshold;

[0030] If the remaining power of the battery does not exceed the preset power threshold, a preset temperature level in which the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source;

[0031] If the remaining power of the battery exceeds the preset power threshold, the engine is started, and the engine waste heat among the plurality of candidate heat sources is determined as the target heat source.

[0032] In some embodiments, the target heat source for battery heating is selected from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and the current working condition of the driving battery, comprising:

[0033] If the current working condition of the battery is to supply power to the driving motor in the pure electric driving mode, a preset temperature level in which the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source.

[0034] In some embodiments, the candidate heat source corresponding to the preset temperature level is set by:

[0035] if the current working condition of the battery is that the battery is in a charging state, selecting one or more heat sources from motor locked-rotor heat, air source heat, and compressor self-generated heat as candidate heat sources corresponding to different preset temperature levels;

[0036] if the current working condition of the battery is that the battery is in a charging state, selecting one or more heat sources from motor locked-rotor heat, air source heat, and compressor self-generated heat as candidate heat sources corresponding to different preset temperature levels;

[0037] A battery heating device based on the heat management system of any of the above embodiments, the device comprising:

[0038] an acquisition module configured to acquire a reference temperature corresponding to the battery in real time, and determine whether the battery needs to be heated based on the reference temperature;

[0039] a heat source determination module configured to, if it is determined that the battery needs to be heated, select a target heat source for battery heating from a plurality of candidate heat sources corresponding to the heat management system according to the reference temperature and the current working condition of the battery;

[0040] a loop determination module configured to determine a battery heating loop based on a heat transfer path of the target heat source to the battery water pump branch in the heat management system.

[0041] In some embodiments, the heat source determination module is configured to:

[0042] if the current working condition of the battery is that the battery is in a charging state, determine whether the remaining power of the battery exceeds a preset power threshold;

[0043] if the remaining power of the battery does not exceed the preset power threshold, determine a preset temperature level in which the reference temperature is located, and determine the candidate heat source corresponding to the preset temperature level as the target heat source;

[0044] if the remaining power of the battery exceeds the preset power threshold, start the engine, and determine the engine waste heat among the plurality of candidate heat sources as the target heat source.

[0045] In some embodiments, the heat source determination module is configured to:

[0046] if the current working condition of the battery is that the battery is in a charging state, determine a preset temperature level in which the reference temperature is located, and determine the candidate heat source corresponding to the preset temperature level as the target heat source.

[0047] In some embodiments, the candidate heat sources corresponding to the preset temperature levels are set by the following ways:

[0048] If the current working condition of the battery is that the battery is in a charging state, one or more heat sources are selected from motor locked-rotor heat, air source heat, and compressor self-generated heat as the candidate heat sources corresponding to different preset temperature levels.

[0049] If the current working condition of the battery is that the driving motor is powered in the pure electric driving mode, one or more heat sources are selected from electric drive device waste heat, motor active heat in the low-efficiency operation mode, air source heat, and compressor self-generated heat as the candidate heat sources corresponding to different preset temperature levels.

[0050] A vehicle comprising the heat management system according to any one of the above embodiments and the battery heating device according to any one of the above embodiments.

[0051] An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the battery heating method according to any one of the above embodiments when executing the computer program.

[0052] A computer-readable storage medium having a computer program stored thereon, wherein the program is executable by a processor to implement the steps of the battery heating method according to any one of the above embodiments.

[0053] In summary, the battery heating method provided in the present application selects a target heat source that can provide heating heat from a plurality of candidate heat sources of the heat management system when the battery needs to be heated, and transfers the heat on the refrigerant side or the heat recovered from the coolant side to the battery water pump branch through the heat pump cycle of the refrigerant circuit and the heat exchanger arranged on the coolant side to heat the battery. The heat of the target heat source is transferred by the target heating circuit determined based on the target heat source, so that the heat in different branches / circuits of the heat management system is recovered and utilized while meeting the battery heating demand, and the battery heating energy consumption is reduced.

[0054] The details of one or more embodiments of the present application are presented in the accompanying drawings and description below. Other features and advantages of the present application will become apparent from the description, the drawings, and the claims. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0056] FIG. 1 is a structural schematic diagram of a cooling liquid circuit of a thermal management system according to an example embodiment of the present application;

[0057] FIG. 2 is a structural schematic diagram of a refrigerant circuit of a thermal management system according to an example embodiment of the present application;

[0058] FIG. 3 is a structural schematic diagram of a cooling liquid circuit of a thermal management system according to another example embodiment of the present application;

[0059] FIG. 4 is a flow schematic diagram of a battery heating method according to an example embodiment of the present application;

[0060] FIG. 5 is a flow schematic diagram of a battery heating method according to an example embodiment of the present application;

[0061] FIG. 6 is a schematic block diagram of a battery heating device according to an example embodiment of the present application;

[0062] FIG. 7 is a schematic block diagram of a vehicle according to an example embodiment of the present application;

[0063] FIG. 8 is a schematic block diagram of an electronic device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The embodiments described by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0065] It should be understood that when used in the specification and the appended claims of the present application, the term “comprises” indicates the presence of the described features, integers, steps, operations, but does not exclude the presence or addition of one or more other features, integers, steps, operations and / or a collection thereof.

[0066] It should also be understood that the term “and / or” used in the specification and the appended claims of the present application refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0067] As used in the specification and the appended claims, the term "if' can be interpreted as meaning "when" or "upon" or "in response to a determination" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to a determination" or "upon detecting [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.

[0068] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0069] Reference in the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, although it can. The terms "comprising", "including", "having" and their variants are meant to be construed as "including but not limited to", unless otherwise specifically noted.

[0070] Fig. 1 is a structural schematic diagram of a cooling liquid circuit of a thermal management system according to an exemplary embodiment of the present application, and Fig. 2 is a structural schematic diagram of a refrigerant circuit of a thermal management system according to an exemplary embodiment of the present application. As shown in Figs. 1-2, the thermal management system 1 includes a cooling liquid circuit 10 and a refrigerant circuit 20.

[0071] The refrigerant circuit 20 is provided with a water-cooled condenser LCC refrigerant side circuit and a battery chiller Chiller refrigerant side circuit. The water-cooled condenser and the battery chiller serve as heat exchangers to achieve heat exchange between the refrigerant side and the cooling liquid side, for example, the water-cooled condenser is used to release heat from the refrigerant side to the cooling liquid side to cool and condense the refrigerant; the battery chiller is used to absorb heat from the cooling liquid side to the refrigerant side to heat and evaporate the refrigerant.

[0072] The cooling liquid circuit 10 can include, but is not limited to, a warm air water pump branch 11 provided with the water-cooled condenser LCC cooling liquid side circuit, a heat exchanger PHX, a battery water pump branch 12, a heat recovery circuit 13 provided with the battery chiller Chiller cooling liquid side circuit.

[0073] In the heat recovery circuit, in addition to including the battery cooler coolant side pipe, a heat transfer branch provided with a heat source device is also included, and the heat transfer branch and the battery cooler coolant side pipe form a heat recovery branch. The heat source device can be understood as a device that can generate heat on the coolant side, such as the heat generated during the conversion of electrical energy or mechanical energy. The heat generated by the heat source device is absorbed by the coolant flowing therein and is carried by the coolant to the battery cooler coolant side pipe, and heat exchange is achieved in the battery cooler, that is, the heat generated by the heat source device is exchanged to the refrigerant side.

[0074] The heat exchanger PHX can also be understood as a heat exchanger, and the heat exchanger PHX is used to achieve heat exchange between different branches on the coolant side.

[0075] When the first end of the one side pipe of the heat exchanger PHX is in communication with the inlet of the battery water pump branch 12, and the second end of the one side pipe of the heat exchanger PHX is in communication with the outlet of the battery water pump branch 12; the first end of the other side pipe of the heat exchanger PHX is in communication with the inlet of the heater water pump branch 11, and the second end of the other side pipe of the heat exchanger PHX is in communication with the outlet of the heater water pump branch 11; the heat exchanger PHX can exchange the heat of the heater water pump branch to the battery water pump branch.

[0076] Among them, the battery water pump branch can include but is not limited to the battery water pump WP1 and the battery Battery. Optionally, the inlet of the battery water pump is in communication with the inlet of the battery water pump branch, and the battery is connected between the outlet of the battery water pump and the outlet of the battery water pump branch. The battery water pump is used to drive the coolant to flow in the battery water pump branch, and the coolant flowing through the battery absorbs the heat of the battery to achieve battery cooling or releases heat to heat the battery.

[0077] The heater water pump branch can include but is not limited to the heater water pump WP2 and the water-cooled condenser coolant side pipe. Optionally, the inlet of the heater water pump is in communication with the inlet of the heater water pump branch, and the water-cooled condenser coolant side pipe is connected between the outlet of the heater water pump and the outlet of the heater water pump branch. The heater water pump is used to drive the coolant to flow in the heater water pump branch, and the coolant flowing through the water-cooled condenser coolant side pipe absorbs the heat released by the refrigerant in the refrigerant side pipe, and the coolant carries the heat of the refrigerant side to other branches / components in the coolant circuit through the flow of the coolant.

[0078] In this application, the water-cooled condenser is used to absorb heat from the refrigerant side to the heater water pump branch, and the heater water pump branch drives the coolant to flow, which carries the heat of the refrigerant end to the heat exchanger, and the heat exchanger exchanges the heat of the refrigerant side from the heater water pump branch to the battery water pump branch, so as to use the heat of the refrigerant side to heat the battery.

[0079] Optionally, the cooling liquid circuit further comprises a cooling liquid bypass branch 14, as shown in FIG. 1, which is in communication with both ends of the warm air heat pump branch to form a warm air circuit; a warm air core can be arranged in the warm air water pump branch, for example, the warm air core can be arranged between the water-cooled condenser cooling liquid side pipeline and the outlet of the warm air water pump branch. In this way, the cooling liquid can be driven to flow from the water-cooled condenser cooling liquid side pipeline to the warm air core, the absorbed heat on the refrigerant side is transmitted to the warm air core, and the warm air core uses the transmitted heat to achieve cabin heating.

[0080] In summary, the thermal management system proposed in the present application couples the refrigerant circuit and the cooling liquid circuit using the water-cooled condenser and the battery cooler, and realizes heat exchange between the refrigerant circuit and the cooling liquid circuit. In the cooling liquid circuit, a heat recovery circuit is constructed based on the battery cooler to absorb the available heat in a certain branch of the cooling liquid side to the refrigerant side using the battery cooler. These heat is transmitted through the refrigerant side heat pump and then released to the warm air water pump branch of the warm air circuit on the cooling liquid side through the water-cooled condenser. The present application communicates the two sides of the heat exchanger with the warm air water pump branch and the battery water pump branch respectively to transmit the heat released to the warm air water pump branch to the battery water pump branch through the heat exchanger to achieve battery heating. The present application uses the refrigerant heat pump cycle to absorb the recoverable heat on the cooling liquid side, and transmits these heat to the battery heating through the warm air water pump branch and the heat exchanger. In this way, the power consumption of battery heating is reduced, and the pure electric cruising range of the vehicle is guaranteed.

[0081] Based on the above embodiments, as shown in FIG. 2, the refrigerant circuit 20 can include but is not limited to a compressor ECP, a hot gas bypass branch 21, a heat pump branch 22 provided with the water-cooled condenser LCC cooling liquid side pipeline and the battery cooler Chiller cooling liquid side pipeline;

[0082] The hot gas bypass branch 21 and the heat pump branch 22 are respectively connected in parallel at both ends of the compressor.

[0083] The heat pump branch and the compressor constitute a heat pump cycle for absorbing heat from the cooling liquid side and releasing heat to the cooling liquid side to realize refrigeration and heating of the thermal management system.

[0084] The refrigerant flowing out of the compressor outlet is divided into the hot gas bypass branch and the heat pump branch, so that part of the refrigerant flowing out of the compressor outlet participates in the heat pump cycle, and part of the refrigerant flows back to the compressor through the hot gas bypass branch to realize self-heating of the compressor, improve the applicable temperature range of the heat pump cycle, and thus guarantee that the heat pump cycle can still absorb and release heat in a low-temperature winter environment, and guarantee normal operation of the battery heating function of the thermal management system.

[0085] Optionally, as shown in FIG. 2, the heat pump branch can include the water-cooled condenser cooling liquid side pipeline, the liquid storage tank R / D, the electronic expansion valve EXV1, and the battery cooler cooling liquid side pipeline connected in series.

[0086] Wherein, the above-mentioned liquid storage tank R / D in series in the heat pump branch can be saved by selecting a water-cooled condenser with a built-in liquid storage tank; the electronic expansion valve EXV1 is used to expand and throttle the refrigerant at the inlet of the battery cooler refrigerant side pipeline, improve the cooling effect of the battery cooler, and ensure the superheat degree at the inlet of the compressor.

[0087] Optionally, a large-diameter, low internal leakage electronic expansion valve EXV2 can be arranged in the hot gas bypass branch, and by adjusting the opening degree of the electronic expansion valve EXV2, the refrigerant flow in the hot gas bypass branch is adjusted, so as to adjust the self-generated heat of the compressor to meet the battery heating requirements of different degrees.

[0088] Therefore, by arranging the hot gas bypass branch in the refrigerant circuit, the self-generated heat of the compressor is realized, the application range of the refrigerant circuit heat pump in low temperature environment is ensured, and the normal operation of the battery heating function of the thermal management system in winter low temperature environment is ensured.

[0089] On the basis of the above-mentioned embodiments, as shown in FIG. 1, the cooling liquid circuit 10 further comprises an electric drive water pump branch 15;

[0090] The outlet of the electric drive water pump branch 15 is in communication with the first end of the battery cooler cooling liquid side pipeline, and the inlet of the electric drive water pump branch 15 is in communication with the second end of the battery cooler cooling liquid side pipeline, forming the electric drive heat recovery circuit. The electric drive heat recovery circuit can be a form of the above-mentioned heat recovery circuit 13.

[0091] Wherein, as shown in FIG. 1, the electric drive water pump branch 15 can comprise an electric drive water pump WP3 and an electric drive device connected in series.

[0092] The electric drive water pump is used to drive the flow of cooling liquid and absorb the heat generated by the electric drive device during operation. After absorbing the electric drive heat, the cooling liquid flows from the outlet of the electric drive water pump branch into the battery cooler cooling liquid side pipeline, so as to transfer the electric drive heat to the refrigerant side. In order to provide the battery heating through the refrigerant side heat pump treatment and heat exchange through the heat exchanger PHX.

[0093] Therefore, the electric drive heat recovery circuit is constructed by connecting the electric drive water pump branch and the battery cooler cooling liquid side pipeline, the electric drive heat is recovered, and the electric drive heat is used for battery heating, thereby saving the power consumption of battery heating.

[0094] On the basis of the above-mentioned embodiments, the cooling liquid circuit further comprises an air heat exchanger, which can be a low-temperature radiator LTR, which can provide heat dissipation function in the refrigeration mode and absorb air source heat in the heating mode. In practice, cooling fans can be arranged at opposite positions of the heat exchanger to enhance air flow and improve heat exchange efficiency.

[0095] As shown in FIG. 1, the low-temperature radiator LTR is connected in series between the inlet of the electrically driven water pump branch and the second end of the battery cooler cooling liquid side pipeline, forming an air source heat recovery circuit as a form of the heat recovery circuit 13.

[0096] The electrically driven water pump driven cooling liquid of the electrically driven water pump branch flows in the air source heat recovery circuit, and the cooling liquid flowing through the low-temperature radiator absorbs the ambient air source heat absorbed by the low-temperature radiator, flows out of the low-temperature radiator, flows into the battery cooler cooling liquid side pipeline through the electrically driven water pump branch, so as to transfer the air source heat to the refrigerant side by the battery cooler. After being processed by the refrigerant side heat pump and exchanged by the heat exchanger PHX, it is provided to the battery water pump branch for battery heating.

[0097] In this way, the application realizes the extraction of air source heat by adding a low-temperature radiator in the electrically driven heat recovery circuit, so as to utilize the air source heat for battery heating, and further saves the power consumption of battery heating.

[0098] On the basis of the above-mentioned embodiments, the cooling liquid circuit further comprises a three-way valve TWV1;

[0099] The first end of the three-way valve TWV1 communicates with the inlet of the electrically driven water pump branch 15, and the second end of the three-way valve TWV1 communicates with the second end of the battery cooler cooling liquid pipeline;

[0100] The third end of the three-way valve TWV1 communicates with the first end of the air heat exchanger LTR, and the second end of the air heat exchanger LTR communicates with the inlet of the electrically driven water pump branch 15.

[0101] By adjusting the opening and closing states of each valve in the three-way valve TWV1, the electrically driven heat can be recovered alone, or the air source heat can be extracted while the electrically driven heat is recovered, and the electrically driven heat and the air source heat are exchanged to the refrigerant side.

[0102] In this way, the application utilizes the three-way valve to control whether the air heat exchanger that absorbs the air source heat is connected to the energy recovery circuit, realizes the switching between the electrically driven heat recovery circuit and the air heat recovery circuit, improves the flexibility of heat source selection during battery heating, and reduces the construction cost of the thermal management system by sharing part of the pipeline.

[0103] On the basis of the above-mentioned embodiment, the cooling liquid circuit 10 further comprises an engine waste heat branch 17 and a four-way valve FWV1;

[0104] The outlet of the engine waste heat branch 17 is in communication with the first end of the four-way valve FWV1, the second end of the four-way valve FWV1 is in communication with the inlet of the warm air water pump branch, the third end of the four-way valve FWV1 is in communication with the second end of the heat exchanger other side pipeline, and the fourth end of the four-way valve FWV1 is in communication with the inlet of the engine waste heat branch.

[0105] The application connects the engine waste heat branch to the circuit formed by the warm air water pump branch and the heat exchanger other side pipeline through the four-way valve, the engine waste heat is transmitted to the heat exchanger other side pipeline through the warm air water pump branch, and then the engine waste heat is exchanged to the heat exchanger one side pipeline in communication with the battery water pump branch, so that the engine waste heat is used for heating the battery.

[0106] The engine waste heat branch can be a branch of the engine cooling circuit, and the cooling liquid flowing out of the outlet of the engine waste heat branch is cooling liquid with engine waste heat, and the engine heat is transmitted to other branches along with the flow of the cooling liquid. The cooling liquid cooled by flowing through other branches flows back to the engine cooling circuit through the inlet of the engine waste heat branch.

[0107] The application can control whether the engine waste heat is connected in series to the above-mentioned circuit formed by the warm air water pump branch and the heat exchanger other side pipeline by adjusting the opening and closing states of the valves of the four-way valve, so that whether the engine waste heat is used for heating the battery is selected according to needs. The flexibility of battery heating heat source switching is enhanced, the engine waste heat is recycled, and the power consumption of battery heating is reduced.

[0108] On the basis of the above-mentioned embodiment, as shown in FIG. 1, the cooling liquid circuit further comprises a proportional three-way valve TWV2;

[0109] The inlet of the cooling liquid bypass branch 15 is in communication with the outlet of the warm air water pump branch, the first end of the proportional three-way valve TWV2 is in communication with the outlet of the cooling liquid bypass branch, the second end of the proportional three-way valve TWV2 is in communication with the second end of the heat exchanger other side pipeline, and the third end of the proportional three-way valve TWV2 is in communication with the inlet of the warm air water pump branch.

[0110] When the engine waste heat branch is connected to the circuit formed by the warm air water pump branch and the heat exchanger other side pipeline, the third end of the proportional three-way valve can be in communication with the fourth end of the four-way valve, and the warm air water pump branch is in communication with the four-way valve and the engine waste heat branch.

[0111] In this way, the heat released by the water-cooled condenser LCC in the warm air water pump branch and / or the engine waste heat can be distributed to the passenger cabin heating and battery heating. The proportion of the valve opening can be adjusted according to the heat required by the battery heating, and the heat distributed to the battery water pump branch can be adjusted to achieve accurate control of the battery temperature.

[0112] Optionally, the two ends of the battery cooler coolant side pipeline are in communication with the two ends of the battery water pump branch respectively, forming a battery cooling loop. As shown in FIG. 1, in this case, a three-way valve TWV3 can be arranged at the first end of the battery cooler coolant side pipeline, a three-way valve TWV4 can be arranged at the inlet of the battery water pump branch, and a one-way valve W-CV1 can be arranged between the outlet of the battery water pump branch and the second end of the battery cooler coolant pipeline. In this way, the battery water pump branch can be connected in series to different loops as required.

[0113] In addition, a four-way valve TWV4 can also be arranged in the heat recovery loop, the two ends of the battery cooler coolant pipeline are in communication with two adjacent ports of the four ports of the four-way valve respectively, and the other branches in the heat recovery loop can be connected in series with the battery cooler coolant pipeline through the other two ports of the four-way valve, so as to realize the switching of the battery cooler energy recovery function and the battery cooling function.

[0114] FIG. 4 is a flowchart illustrating a battery heating method according to an exemplary embodiment of the present application. The battery heating method proposed in the present application can select a usable heat source for the battery based on the heat management system described in any of the above embodiments, and use the heat of the heat source to heat the battery, thereby meeting the battery heating demand while reducing the power consumption of the battery heating. As shown in FIG. 4, the method comprises the following steps:

[0115] S401, acquiring a reference temperature corresponding to the battery in real time, and determining whether the battery needs to be heated based on the reference temperature.

[0116] The reference temperature corresponding to the battery can be acquired by a temperature acquisition device such as a temperature sensor. The reference temperature can be the ambient temperature or the coolant temperature at the outlet of the battery in the coolant loop.

[0117] When the reference temperature is less than or equal to a preset temperature threshold, the battery needs to be heated. When the reference temperature is greater than the preset temperature threshold, the battery does not need to be heated. The preset temperature threshold can be set as required, which is not limited in the present application.

[0118] S402, if it is determined that the battery needs to be heated, selecting a target heat source for battery heating from a plurality of candidate heat sources corresponding to the heat management system according to the reference temperature and the current working condition of the battery;

[0119] If it is determined that the battery needs to be heated, the vehicle can be determined to be in driving, and the motor in the vehicle can be determined to be in power consumption operation according to whether the battery is in a charging state, a power supply state, and the like, so as to obtain a candidate heat source that can generate heat under the current thermal management system.

[0120] According to the size of the reference temperature currently corresponding to the battery, the heat required for heating the battery can be estimated, and a target heat source that can meet the heating demand of the battery is selected from the candidate heat sources that can generate heat.

[0121] S403, determining a target heating loop based on a heat transfer path of the target heat source to the battery water pump branch in the thermal management system.

[0122] After the target heat source is determined, the heat transfer path of the target heat source to the battery water pump branch can be determined based on the structure of the thermal management system of the application. Then, the related equipment such as the communication valve and the water pump that need to be controlled are determined, and the target heating loop that can transfer the heat of the target heat source to the battery water pump branch is opened by adjusting the opening / closing of different valves of the communication valve.

[0123] Optionally, the heat transfer paths of the battery heating using different candidate heat sources can be stored in advance.

[0124] In summary, the battery heating method provided in the application selects a target heat source that can provide heating heat from a plurality of candidate heat sources of the thermal management system when the battery needs to be heated. The heat on the refrigerant side or the heat recovered from the coolant side is transferred to the battery water pump branch through the heat pump cycle of the refrigerant loop and the heat exchanger arranged on the coolant side to heat the battery. The heat of the target heat source is transferred through the target heating loop determined based on the target heat source, so as to meet the battery heating demand, realize the recovery and utilization of heat in different branches / loops in the thermal management system, and reduce the energy consumption of battery heating.

[0125] On the basis of the above-mentioned embodiments, as shown in FIG. 5, the step S502 includes the following steps:

[0126] S501, if the current working condition of the battery is that the battery is in a charging state, it is judged whether the remaining power of the battery exceeds a preset power threshold;

[0127] S502, if the remaining power of the battery does not exceed the preset power threshold, a preset temperature level where the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source;

[0128] S503, if the remaining power of the battery exceeds the preset power threshold, starting the engine, and determining the engine waste heat in the plurality of candidate heat sources as the target heat source.

[0129] For example, before heating the battery, the target heat source can be determined by the following process:

[0130] The ECU determines the state of the vehicle battery according to the signal fed back by the CAN network (which can be a signal representing the mode of the vehicle, such as a signal representing that the vehicle is in a charging mode or a pure electric driving mode), and further determines the remaining power of the battery if the battery is in a charging state:

[0131] When the remaining power of the battery exceeds the preset power threshold, the battery can be heated by consuming electric energy, for example, by converting electric energy into heat energy to heat the battery by controlling the motor to enter the locked-rotor mode to generate heat, or by starting the compressor to generate heat.

[0132] When the remaining power of the battery does not exceed the preset power threshold, to avoid excessive consumption of electric energy for battery heating, affecting the normal operation of the basic functions of the vehicle, the application starts the engine to heat the battery with the waste heat of the engine.

[0133] The preset power threshold can be set as needed, and the application does not limit it.

[0134] Optionally, based on the size of the reference temperature, the temperature range in which the reference temperature is located can be determined, and the preset temperature level corresponding to the reference temperature can be determined, and the amount of heat required for battery heating can be estimated by different temperature levels. The application can set corresponding candidate heat sources for different temperature levels in advance.

[0135] In the embodiment of the application, when the battery is in a charging state, the remaining power of the battery is determined before the target heat source is determined. When the remaining power is low, the engine waste heat is selected as the battery heating source to ensure the normal operation of the basic functions of the vehicle without affecting the charging of the battery. When the remaining power of the battery is greater than the preset power threshold, the heating heat required by the battery is estimated based on the reference temperature of the battery, and a heat source that can meet the heating demand of the battery is selected to ensure that the heating demand of the battery is met while reducing the electric energy consumed by the battery heating.

[0136] On the basis of the above embodiment, if the current working condition of the battery is to supply power to the driving motor in the pure electric driving mode, the preset temperature level in which the reference temperature is located is determined, and the candidate heat source corresponding to the preset temperature level is determined as the target heat source.

[0137] If the vehicle is in the pure electric driving mode, the battery supplies power to the driving motor, and in order not to affect the normal driving of the vehicle, the engine is not started, and only the target heat source is selected from the candidate heat sources corresponding to the temperature level where the reference temperature is located. In this way, the battery heating task is avoided to affect the normal driving of the vehicle.

[0138] On the basis of the above embodiment, the candidate heat sources corresponding to the preset temperature levels are set in the following manner:

[0139] If the current working condition of the battery is that the battery is in the charging state, one or more heat sources are selected from the motor locked-rotor heat, the air source heat, and the compressor self-created heat as the candidate heat sources corresponding to different preset temperature levels.

[0140] If the current working condition of the battery is that the battery supplies power to the driving motor in the pure electric driving mode, one or more heat sources are selected from the electric drive device waste heat, the motor active heat in the low-efficiency operation mode, the air source heat, and the compressor self-created heat as the candidate heat sources corresponding to different preset temperature levels.

[0141] When the vehicle is in the charging mode and the battery is in the charging state, the motor does not need to provide driving power for the vehicle, and then the motor can be controlled to enter the locked-rotor mode, and the locked-rotor heat of the motor is used to heat the battery; or when the external environment temperature can meet the heat absorption condition of the low-temperature radiator, the low-temperature radiator is used to absorb the air source heat of the external environment to heat the battery, or when the external environment cannot provide heating heat, the compressor is started to create heat, and the electric energy is converted into heat energy to heat the battery.

[0142] When the battery supplies power to the driving motor and the vehicle is in the driving state, the motor needs to provide driving power for the vehicle driving, and in this case, the motor can be controlled to enter the low-efficiency mode, the mechanical energy conversion efficiency of the motor is reduced, part of the electric energy is converted into heat energy to heat the battery without affecting the normal driving of the vehicle.

[0143] The application can select the candidate heat source that does not affect the normal driving of the vehicle from the multiple available candidate heat sources based on the working condition of the battery.

[0144] When there are multiple available candidate heat sources, the target heat source is selected based on the temperature level where the reference temperature is located.

[0145] Optionally, the division of the temperature levels under different battery working conditions and the setting of the candidate heat sources corresponding to different temperature levels can be different. For example, the division granularity of the temperature levels can be adjusted as needed, and the corresponding candidate heat sources are further set for each temperature level, further guaranteeing the supply of the battery heating heat and avoiding the waste of the heat energy source.

[0146] For example, the battery heating process under different battery working conditions is described in combination with FIG. 2 and FIG. 3:

[0147] In the charging state:

[0148] 1) When the ambient temperature is greater than 10℃, the battery heating is not triggered;

[0149] 2) When the ambient temperature T is lower than 10℃ and the remaining battery power SOC is lower than 15%, the engine is started to heat the battery, and the target heating loop is started through the following control mode:

[0150] The engine is started, the 1 and 2 ends of the FWV1 are connected, the 3 and 4 ends are connected, the heater water pump WP2 works, the TWV2 controls the cooling liquid flow through the heat exchanger PHX according to the battery heating demand, the battery water pump WP1 is started, the 1 and 2 ends of the TWV4 are connected, and the heat is brought to the battery to realize the heating of the battery.

[0151] 3) When the ambient temperature is lower than -5℃ and the remaining battery power SOC is higher than 15%, the motor is started in the locked-rotor mode, the compressor is started in the self-heat mode, the heat is quickly generated, the battery is heated, and the target heating loop is started through the following control mode:

[0152] The compressor ECP works, the water-cooled condenser LCC works, the electronic expansion valves EXV1 and EXV2 are started, the chiller is started to absorb the heat generated in the motor locked-rotor mode, the compressor and the EXV1 work, and the electric energy of the compressor is converted into heat energy;

[0153] The electric drive water pump WP3 is started to bring the cooling liquid to the electric drive equipment, the heat generated in the motor locked-rotor mode is taken out, the 2 and 3 ends of the four-way valve FWV2 are connected, and the 1 and 4 ends are connected; the 1 and 3 ends of the three-way valve TWV3 are connected, the 1 and 2 ends of the TWV1 are connected, the heat is absorbed by the chiller, and then released to the heater water pump branch through the water-cooled condenser LCC;

[0154] The heater water pump WP2 works, the TWV2 controls the cooling liquid flow through the heat exchanger PHX according to the battery heating demand, the battery water pump WP1 is started, the 1 and 2 ends of the TWV4 are connected, the heat is brought to the battery, and the heating of the battery is realized.

[0155] Until the battery outlet cooling liquid temperature is greater than 10℃, the heating is stopped, and all components stop working.

[0156] 4) When the ambient temperature is higher than -5℃ and the remaining battery power SOC is higher than 15%, the battery heating is performed by using the motor locked-rotor heat and the air source heat, and the target heating loop is started through the following control mode:

[0157] Compressor ECP works, water-cooled condenser LCC works, electronic expansion valve EXV1 opens, expansion valve EXV2 closes, chiller opens to absorb the heat of motor locked-rotor mode and the heat of external air source;

[0158] Electric drive water pump WP3 opens to take the cooling liquid to the electric drive equipment and take out the heat generated by the motor locked-rotor mode, 2, 3 ends of four-way valve FWV2 are communicated, 1, 4 ends are communicated; 1, 3 ends of three-way valve TWV3 are communicated, 2, 3 ends of TWV1 are communicated, the fan arranged behind the low-temperature radiator is opened to absorb the heat in the environment through the low-temperature radiator LTR, all the heat is taken away by the chiller and released to the warm air water pump branch through the water-cooled condenser LCC;

[0159] Warm air water pump WP2 works; TWV2 controls the cooling liquid flow through the heat exchanger PHX according to the battery heating demand; battery water pump WP1 opens, 1, 2 ends of TWV4 are communicated to take the heat to the battery to realize the heating of the battery;

[0160] Until the battery outlet cooling liquid temperature is greater than 10℃, the heating stops, and all components stop working.

[0161] For the power supply of the drive motor in the pure electric driving mode:

[0162] 1) When the environment temperature is greater than 10℃, the battery heating is not triggered;

[0163] 2) When the environment temperature is greater than 0℃, the battery heating is performed by using the electric drive waste heat and the heat of external air source, and the target heating circuit is started through the following control mode:

[0164] Compressor ECP works, water-cooled condenser LCC works, electronic expansion valve EXV1 opens, expansion valve EXV2 closes, chiller opens to absorb the heat of motor locked-rotor mode and the heat of external air source;

[0165] Electric drive water pump WP3 opens to take the cooling liquid to the electric drive equipment and take out the heat generated by the motor normal working mode, 2, 3 ends of four-way valve FWV2 are communicated, 1, 4 ends are communicated; 1, 3 ends of three-way valve TWV3 are communicated, 2, 3 ends of TWV1 are communicated, the fan arranged behind the low-temperature radiator is opened to absorb the heat in the environment through the low-temperature radiator LTR, all the heat is taken away by the chiller and released to the warm air water pump branch through the water-cooled condenser LCC;

[0166] Warm air water pump WP2 works; TWV2 controls the cooling liquid flow through the heat exchanger PHX according to the battery heating demand; battery water pump WP1 opens, 1, 2 ends of TWV4 are communicated to take the heat to the battery to realize the heating of the battery;

[0167] Stop heating until the battery outlet coolant temperature is greater than 10℃, all components stop working.

[0168] 3) When the ambient temperature T is greater than -5℃ and less than 0℃, use the heat of the air source and the heat in the low efficiency mode of the motor to heat the battery, and start the target heating circuit by the following control mode:

[0169] The compressor ECP works, the water-cooled condenser LCC works, the electronic expansion valve EXV1 is opened, the expansion valve EXV2 is closed, and the chiller absorbs the heat in the low efficiency mode of the electric drive motor and the heat of the external air source;

[0170] The electric drive water pump WP3 is opened to take the coolant to the electric drive device and take out the heat generated in the low efficiency mode of the motor, the 2, 3 ends of the four-way valve FWV2 are connected, and the 1, 4 ends are connected; the 1, 3 ends of the three-way valve TWV3 are connected, the 2, 3 ends of TWV1 are connected, the fan after the low temperature radiator is opened, absorbs the heat in the environment through the low temperature radiator LTR, and all the heat is taken away by the chiller and released to the warm air water pump branch through the water-cooled condenser LCC;

[0171] The warm air water pump WP2 works; TWV2 controls the coolant flow through the heat exchanger PHX according to the battery heating demand; the battery water pump WP1 is opened, and the 1, 2 ends of TWV4 are connected to take the heat to the battery to heat the battery;

[0172] Stop heating until the battery outlet coolant temperature is greater than 10℃, all components stop working.

[0173] 4) When the ambient temperature T is less than -5℃ and greater than -15℃, use the heat generated by the compressor to heat the battery, and start the target heating circuit by the following control mode:

[0174] The compressor ECP works, the water-cooled condenser LCC works, the electronic expansion valves EXV1 and EXV2 are opened, the chiller is opened to absorb the residual heat of the motor in normal operation, the compressor and EXV1 work to convert the electric energy of the compressor into heat energy;

[0175] The electric drive water pump WP3 is opened to take the coolant to the electric drive device and take out the residual heat of the motor, the 2, 3 ends of the four-way valve FWV2 are connected, and the 1, 4 ends are connected; the 1, 3 ends of the three-way valve TWV3 are connected, the 1, 2 ends of TWV1 are connected, the heat is taken away by the chiller, and then released to the warm air water pump branch through the water-cooled condenser LCC;

[0176] The warm air water pump WP2 works; TWV2 controls the coolant flow through the heat exchanger PHX according to the battery heating demand; the battery water pump WP1 is opened, and the 1, 2 ends of TWV4 are connected to take the heat to the battery to heat the battery;

[0177] Stop heating until the battery outlet coolant temperature is greater than 10℃, all components stop working.

[0178] 5) When the ambient temperature T is less than -15℃, the battery is heated by the compressor self-generated heat and the heat in the motor low efficiency mode, as the water temperature rises, the motor low efficiency mode gradually exits, and the battery is heated by the compressor self-generated heat and the electric drive residual heat:

[0179] The compressor ECP works, the water-cooled condenser LCC works, the electronic expansion valve EXV1 and EXV2 are opened, the chiller is opened to absorb the electric drive residual heat when the motor works normally, the compressor and EXV1 work, and the electric energy of the compressor is converted into heat energy;

[0180] The electric drive water pump WP3 is opened to take the coolant to the electric drive equipment and take out the motor block residual heat, the 2, 3 ends of the four-way valve FWV2 are connected, and the 1, 4 ends are connected; the 1, 3 ends of the three-way valve TWV3 are connected, the 1, 2 ends of TWV1 are connected, the heat is absorbed by the chiller, and then released to the warm air water pump branch through the water-cooled condenser LCC;

[0181] The warm air water pump WP2 works; TWV2 controls the coolant flow through the heat exchanger PHX according to the battery heating requirement; the battery water pump WP1 is opened, the 1, 2 ends of TWV4 are connected, and the heat is taken to the battery to realize the heating of the battery;

[0182] When the battery outlet coolant temperature is greater than 0℃, the motor low efficiency mode exits and turns to the normal working mode, and the heating is supplied by the compressor self-generated heat and the electric drive residual heat;

[0183] Stop heating until the battery outlet coolant temperature is greater than 10℃, all components stop working.

[0184] Therefore, the battery heating can be realized by single or combination of the compressor self-generated heat, the electric drive residual heat, the engine residual heat, the electric drive low efficiency heat, the motor block residual heat, and the air source heat, the heating efficiency is higher, and the battery heating does not need PTC, the cost is reduced, the battery heating energy consumption is reduced, and the low temperature pure electric endurance of the vehicle is improved.

[0185] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

[0186] Fig. 6 is a schematic block diagram of a battery heating device according to an exemplary embodiment of the application, as shown in Fig. 6, the device 600 comprises an acquisition module 601, a heat source determination module 602 and a loop determination module 603.

[0187] The acquisition module 601 is configured to acquire a reference temperature corresponding to the battery in real time, and determine whether the battery needs to be heated based on the reference temperature.

[0188] The heat source determination module 602 is configured to, if it is determined that the battery needs to be heated, select a target heat source for battery heating from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and a current working condition of the battery.

[0189] The loop determination module 603 is configured to determine a battery heating loop based on a heat transfer path of the target heat source to the battery water pump branch in the thermal management system.

[0190] In some embodiments, the heat source determination module is configured to:

[0191] If the current working condition of the battery is that the battery is in a charging state, it is determined whether the remaining power of the battery exceeds a preset power threshold.

[0192] If the remaining power of the battery does not exceed the preset power threshold, a preset temperature level in which the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source.

[0193] If the remaining power of the battery exceeds the preset power threshold, the engine is started, and the engine waste heat in the plurality of candidate heat sources is determined as the target heat source.

[0194] In some embodiments, the heat source determination module is configured to:

[0195] If the current working condition of the battery is that the driving motor is powered in the pure electric driving mode, a preset temperature level in which the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source.

[0196] In some embodiments, the candidate heat source corresponding to the preset temperature level is set in the following manner:

[0197] If the current working condition of the battery is that the battery is in a charging state, one or more heat sources are selected from motor locked-rotor heat, air source heat and compressor self-generated heat as the candidate heat sources corresponding to different preset temperature levels.

[0198] If the current working condition of the battery is that the driving motor is powered in the pure electric driving mode, one or more heat sources are selected from electric drive device waste heat, motor active heat in the low-efficiency operation mode, air source heat and compressor self-generated heat as the candidate heat sources corresponding to different preset temperature levels.

[0199] In summary, the battery heating device provided in the application selects a target heat source that can provide heating heat from multiple candidate heat sources of the thermal management system when heating of the battery is required, and transmits heat on the refrigerant side or heat recovered from the coolant side to the battery water pump branch through the heat pump cycle of the refrigerant circuit and the heat exchanger arranged on the coolant side to heat the battery. The heat transfer of the target heat source is realized by using the target heating circuit determined based on the target heat source, so as to realize the recovery and utilization of heat in different branches / circuits of the thermal management system while meeting the battery heating demand, and reduce the battery heating energy consumption.

[0200] To achieve the above-embodiment, the embodiment of the application further provides a vehicle 700, as shown in FIG. 7, which comprises the thermal management system 1 according to any of the above-embodiments and the battery heating device 600 according to any of the above-embodiments.

[0201] To achieve the above-embodiment, the embodiment of the application further provides an electronic device 800, as shown in FIG. 8, which specifically can comprise a memory 801, a processor 802, and a computer program stored in the memory 801 and executable on the processor 802, and when the processor 802 executes the program, the steps of the test method of the vehicle body structure performance according to the above-embodiment are realized.

[0202] Those skilled in the art can understand that all or part of the processes in the above-embodiment methods can be completed by a computer program instructing related hardware, and the computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-embodiments can be included. Any reference to memory, storage, database or other medium used in each embodiment of the application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0203] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above.

[0204] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A thermal management system, wherein, The refrigerant circuit comprises a cooling liquid circuit, a refrigerant circuit provided with a water-cooled condenser refrigerant side pipeline and a battery cooler refrigerant side pipeline; The cooling liquid circuit comprises a warm air water pump branch provided with the water-cooled condenser cooling liquid side pipeline, a heat exchanger, a battery water pump branch, a heat recovery circuit provided with the battery cooler cooling liquid side pipeline; The first end of the one side pipeline of the heat exchanger is in communication with the inlet of the battery water pump branch, and the second end of the one side pipeline of the heat exchanger is in communication with the outlet of the battery water pump branch; The first end of the other side pipeline of the heat exchanger is in communication with the inlet of the warm air water pump branch, and the second end of the other side pipeline of the heat exchanger is in communication with the outlet of the warm air water pump branch.

2. The system of claim 1, wherein, The refrigerant circuit comprises a compressor, a hot gas bypass branch, a heat pump branch provided with the water-cooled condenser refrigerant side pipeline and the battery cooler refrigerant side pipeline; The hot gas bypass branch and the heat pump branch are respectively connected in parallel at both ends of the compressor.

3. The system of claim 1, wherein, The cooling liquid circuit further comprises an electrically driven water pump branch, and the heat recovery circuit comprises an electrically driven heat recovery circuit; The outlet of the electrically driven water pump branch is in communication with the first end of the battery cooler cooling liquid side pipeline, and the inlet of the electrically driven water pump branch is in communication with the second end of the battery cooler cooling liquid side pipeline, forming the electrically driven heat recovery circuit.

4. The system of claim 3, wherein, The cooling liquid circuit further comprises an air heat exchanger, and the heat recovery circuit further comprises an air source heat recovery circuit; The air heat exchanger is connected in series between the inlet of the electrically driven water pump branch and the second end of the battery cooler cooling liquid side pipeline, forming the air source heat recovery circuit.

5. The system of claim 3, wherein, The cooling liquid circuit further comprises a three-way valve; The first end of the three-way valve is in communication with the inlet of the electrically driven water pump branch, and the second end of the three-way valve is in communication with the first end of the battery cooler cooling liquid pipeline; The third end of the three-way valve is in communication with the first end of the air heat exchanger, and the second end of the air heat exchanger is in communication with the inlet of the electrically driven water pump branch.

6. The system of any one of claims 1-5, wherein, The cooling liquid circuit further comprises an engine waste heat branch and a four-way valve; The outlet of the engine waste heat branch is in communication with the first end of the four-way valve, the second end of the four-way valve is in communication with the inlet of the warm air water pump branch, the third end of the four-way valve is in communication with the second end of the other side pipeline of the heat exchanger, and the fourth end of the four-way valve is in communication with the inlet of the engine waste heat branch.

7. The system of any one of claims 1-5, wherein, The cooling liquid circuit further comprises a proportional three-way valve and a cooling liquid bypass branch; The inlet of the cooling liquid bypass branch is in communication with the outlet of the warm air water pump branch, the first end of the proportional three-way valve is in communication with the outlet of the cooling liquid bypass branch, the second end of the proportional three-way valve is in communication with the second end of the other side pipeline of the heat exchanger, and the third end of the proportional three-way valve is in communication with the inlet of the warm air water pump branch.

8. A battery heating method, wherein, Based on the heat management system according to any one of claims 1-7, the method comprises: Real-time acquisition of a reference temperature corresponding to the battery, and determination of whether heating of the battery is required based on the reference temperature; If it is determined that the battery needs to be heated, a target heat source for battery heating is selected from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and the current working condition of the battery; A target heating loop is determined based on a heat transfer path of the target heat source to the battery water pump branch in the thermal management system.

9. The method of claim 8, wherein, The target heat source for battery heating is selected from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and the current working condition of the battery, including: If the current working condition of the battery is that the battery is in a charging state, it is determined whether the remaining power of the battery exceeds a preset power threshold; If the remaining power of the battery does not exceed the preset power threshold, a preset temperature level in which the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source; If the remaining power of the battery exceeds the preset power threshold, the engine is started, and the engine waste heat in the plurality of candidate heat sources is determined as the target heat source.

10. The method of claim 8, wherein, The target heat source for battery heating is selected from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and the current working condition of the battery, including: If the current working condition of the battery is that the driving motor is powered in the pure electric driving mode, a preset temperature level in which the reference temperature is located is determined, and a candidate heat source corresponding to the preset temperature level is determined as the target heat source.

11. The method of claim 9 or 10, wherein, The candidate heat source corresponding to the preset temperature level is set in the following manner: If the current working condition of the battery is that the battery is in a charging state, one or more heat sources are selected from motor locked-rotor heat, air source heat, and compressor self-generated heat as candidate heat sources corresponding to different preset temperature levels; If the current working condition of the battery is that the driving motor is powered in the pure electric driving mode, one or more heat sources are selected from electric drive device waste heat, motor active heat in the low-efficiency operation mode, air source heat, and compressor self-generated heat as candidate heat sources corresponding to different preset temperature levels.

12. A battery heating device, wherein, The device comprises the thermal management system as claimed in any one of claims 1-7, and the battery heating device as claimed in claim 12. An acquisition module is configured to acquire a reference temperature corresponding to a battery in real time, and determine whether the battery needs to be heated based on the reference temperature; A heat source determination module is configured to select a target heat source for battery heating from a plurality of candidate heat sources corresponding to the thermal management system according to the reference temperature and the current working condition of the battery if it is determined that the battery needs to be heated; A loop determination module is configured to determine a battery heating loop based on a heat transfer path of the target heat source to the battery water pump branch in the thermal management system.

13. A vehicle, wherein, The device comprises the thermal management system as claimed in any one of claims 1-7, and the battery heating device as claimed in claim 12.

14. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, The processor executes the computer program to implement the steps of the battery heating method as claimed in any one of claims 8-11.

15. A computer readable storage medium having stored thereon a computer program, wherein, The program is executed by the processor to implement the steps of the battery heating method as claimed in any one of claims 8-11.

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