Control method of thermal management system, thermal management system and vehicle

Abstract

The invention discloses a control method of a thermal management system, the thermal management system and a vehicle. The control method of the thermal management system comprises the steps that heat exchange is conducted on a battery pack cooling loop and a heating cooling loop; acquiring air conditioner heating demand parameters and / or battery pack temperature parameters; and according to the air conditioner heating demand parameters and / or the battery pack temperature parameters, the flow of a cooling medium for heat exchange between the battery pack cooling loop and the heating cooling loop is adjusted, so that the heat exchange amount of the battery pack cooling loop and the heating cooling loop is adjusted. According to the control method of the heat management system, the temperature of the battery pack cooling loop and the temperature of the heating cooling loop can be adjusted, heat storage and heat release of the battery pack are achieved, and the temperature requirement of the battery pack and the heating requirement of an air conditioner are balanced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a control method of a thermal management system, a thermal management system and a vehicle. Background Art

[0002] The thermal management system in the related art usually utilizes the air-conditioning module to heat the passenger compartment, or can utilize the air-conditioning module to heat or cool the battery pack. However, due to the unreasonable setting of the thermal management system in the related art, it is unable to reasonably adjust the heat exchange amount between the battery pack and the air-conditioning module, and thus is unable to meet the balance between the heating demand of the air-conditioning module and the heat required by the battery pack, making it difficult to keep the battery pack working efficiently and unable to efficiently utilize the heat storage capacity of the battery pack. Alternatively, the battery pack has excessive heat, which may cause the battery pack temperature to be too high and the safety to be low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a control method for a thermal management system, which can adjust the temperature of a battery pack cooling circuit and the temperature of a heating cooling circuit, realize heat storage and heat release of the battery pack, and balance the temperature requirements of the battery pack and the heating requirements of the air conditioner.

[0004] The invention also provides a thermal management system.

[0005] The present invention also provides a vehicle having the thermal management system.

[0006] In order to achieve the above object, a control method of a thermal management system is provided according to a first aspect of the present invention, comprising: heat exchanging a battery pack cooling circuit with a heating cooling circuit;

[0007] Acquire air conditioning and heating demand parameters and / or battery pack temperature parameters; adjust the cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange according to the air conditioning and heating demand parameters and / or the battery pack temperature parameters to adjust the heat exchange amount of the battery pack cooling circuit and the heating cooling circuit.

[0008] The control method of the thermal management system according to the embodiment of the present invention can adjust the temperature of the battery pack cooling circuit and the temperature of the heating cooling circuit, realize heat storage and heat release of the battery pack, and balance the battery pack temperature requirements and air conditioning heating requirements.

[0009] According to some embodiments of the present invention, the control method of the thermal management system further includes: connecting an engine cooling circuit and the heating cooling circuit.

[0010] According to some embodiments of the present invention, the method of adjusting the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit according to the air-conditioning heating demand parameters and / or the battery pack temperature parameters includes: if the battery pack temperature parameters meet the upper limit condition of battery pack heat storage, reducing the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit.

[0011] According to some embodiments of the present invention, if the battery pack temperature parameter meets the upper limit condition of battery pack heat storage, it includes: the battery pack temperature is greater than a first preset temperature value; and / or the temperature of the cooling medium at the battery pack inlet is greater than a second preset temperature value.

[0012] According to some embodiments of the present invention, the method of adjusting the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit according to the air-conditioning heating demand parameter and / or the battery pack temperature parameter also includes: if the battery pack temperature parameter does not meet the battery pack heat storage upper limit condition, determining whether the air-conditioning heating demand parameter meets the insufficient heating condition; if so, reducing the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit.

[0013] According to some embodiments of the present invention, determining whether the air conditioning heating demand parameter satisfies the insufficient heating condition includes: determining whether the difference between the air conditioning target air outlet temperature and the air conditioning actual air outlet temperature is not less than a first preset difference; if so, the air conditioning heating demand parameter satisfies the insufficient heating condition; if not, the air conditioning heating demand parameter does not satisfy the insufficient heating condition.

[0014] According to some embodiments of the present invention, adjusting the opening of the first control valve according to the air-conditioning heating demand parameter and / or the battery pack temperature parameter also includes: if the air-conditioning heating demand parameter does not meet the insufficient heating condition, determining whether the air-conditioning heating demand parameter meets the surplus heating condition; if so, increasing the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit; if not, maintaining the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit unchanged.

[0015] According to some embodiments of the present invention, determining whether the air conditioning heating demand parameter satisfies the heating surplus condition includes: determining whether the difference between the air conditioning target air outlet temperature and the air conditioning actual air outlet temperature is not greater than a second preset difference; if so, the air conditioning heating demand parameter satisfies the heating surplus condition; if not, the air conditioning heating demand parameter does not satisfy the heating surplus condition.

[0016] According to some embodiments of the present invention, the target air outlet temperature of the air conditioner is calculated based on the ambient temperature outside the vehicle, the ambient temperature inside the vehicle and the set temperature of the air conditioner.

[0017] According to some embodiments of the present invention, when a battery heating signal is received, the battery water pump of the battery pack cooling circuit operates at a first preset speed; when a battery heating signal is not received and a battery heat storage signal is received, the battery water pump of the battery pack cooling circuit operates at a second preset speed; when a battery heating signal is not received and a battery heat release signal is received, the battery water pump of the battery pack cooling circuit operates at a third preset speed; wherein the first preset speed and the third preset speed are both greater than the second preset speed.

[0018] According to a second aspect of the present invention, an embodiment of the present invention provides a thermal management system, comprising: a heating and cooling circuit, the heating and cooling circuit being suitable for heat exchange with a passenger compartment; a first heat exchanger, the first heat exchanger having a first heat exchange channel and a second heat exchange channel for exchanging heat with each other, the first heat exchange channel being connected to the heating and cooling circuit; a battery pack cooling circuit, the second heat exchange channel being connected to the battery pack cooling circuit, the battery pack cooling circuit comprising a first control valve; a controller, the controller being connected to the first control valve, the controller adjusting the opening of the first control valve according to air-conditioning heating demand parameters and / or battery pack temperature parameters to adjust the heat exchange amount of the battery pack cooling circuit and the heating and cooling circuit.

[0019] The thermal management system according to the second aspect of the embodiment of the present invention can adjust the temperature of the battery pack cooling circuit and the temperature of the heating cooling circuit, realize heat storage and heat release of the battery pack, and balance the battery pack temperature requirements and air conditioning and heating requirements.

[0020] According to some embodiments of the present invention, the battery pack cooling circuit also includes: a battery pack and a water temperature sensor, the first control valve having a liquid inlet and a first liquid outlet, the liquid inlet, the first liquid outlet, the second heat exchange channel and the battery pack are connected in series, the water temperature sensor is arranged in the battery pack and connected to the controller, and is used to detect the temperature of the cooling medium at the battery pack inlet; a battery pack temperature sensor, the battery pack temperature sensor is connected to the controller, and the battery pack temperature sensor is arranged in the battery pack, and is used to detect the temperature of the battery pack; wherein the controller adjusts the opening between the liquid inlet and the first liquid outlet of the first control valve according to the air conditioning and heating demand parameters and / or the battery pack temperature parameters.

[0021] According to some embodiments of the present invention, the battery pack cooling circuit also includes: a battery water pump, which is connected in series with the battery pack and connected to the controller; wherein, when the controller receives a battery heating signal, the battery water pump operates at a first preset speed; when the controller does not receive a battery heating signal but receives a battery heat storage signal, the battery water pump operates at a second preset speed; when the controller does not receive a battery heating signal but receives a battery heat release signal, the battery water pump operates at a third preset speed, and both the first preset speed and the third preset speed are greater than the second preset speed.

[0022] According to some embodiments of the present invention, the first control valve also has a second liquid outlet, the second liquid outlet and the battery pack are connected through a cooling medium branch, and the cooling medium branch and the second heat exchange channel are connected in parallel, and the first control valve has a first state, a second state and a third state; wherein, when the first control valve is in the first state, the liquid inlet is connected to the first liquid outlet, and the liquid inlet is disconnected from the second liquid outlet; when the first control valve is in the second state, the liquid inlet is connected to the second liquid outlet, and the liquid inlet is disconnected from the first liquid outlet; when the first control valve is in the third state, the liquid inlet is connected to the first liquid outlet and the second liquid outlet, respectively.

[0023] According to some embodiments of the present invention, the thermal management system further comprises: an engine cooling circuit, which is selectively connected to the heating cooling circuit.

[0024] According to some embodiments of the present invention, the thermal management system also includes: a second control valve, the second control valve is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface and the second interface are connected to the engine cooling circuit, the third interface and the fourth interface are connected to the heating cooling circuit, and the second control has a switchable third state and a fourth state; wherein, when the second control valve is in the third state, the first interface and the second interface are connected, the third interface and the fourth interface are connected, and the engine cooling circuit and the heating cooling circuit are disconnected; when the second control valve is in the fourth state, the first interface and the fourth interface are connected, the second interface is connected to the third interface, and the engine cooling circuit and the heating cooling circuit are connected.

[0025] According to some embodiments of the present invention, the heating cooling circuit includes: a warm air core, the warm air core, the first heat exchange channel, the third interface and the fourth interface are connected in series, the warm air core is used for heat exchange with the passenger compartment; an outlet air temperature sensor, the outlet air temperature sensor is connected to the controller, and the outlet air temperature sensor is used to detect the outlet air temperature of the warm air core.

[0026] According to some embodiments of the present invention, the heating and cooling circuit further comprises: an electric heater, which is connected in series with the warm air core and is used to heat the cooling medium in the heating and cooling circuit.

[0027] According to some embodiments of the present invention, the engine cooling circuit includes: an engine, the engine is connected to the first interface; a thermostat, the thermostat is provided with an inlet, a first outlet and a second outlet, the inlet is connected to the engine, and the first outlet is connected to the second interface; a radiator, the radiator is respectively connected to the engine and the second outlet; wherein the thermostat regulates the flow of the cooling medium between the engine and the radiator.

[0028] According to some embodiments of the present invention, the thermal management system also includes: a heat pump cooling circuit, the heat pump cooling circuit including a compressor, an in-vehicle heat exchanger and an out-vehicle heat exchanger; a second heat exchanger, the second heat exchanger having a third heat exchange channel and a fourth heat exchange channel for mutual heat exchange, the third heat exchange channel is connected to the battery pack cooling circuit, the fourth heat exchange channel is connected to the heat pump cooling circuit, and the heat pump cooling circuit and the battery pack cooling circuit perform heat exchange through the second heat exchanger.

[0029] According to some embodiments of the present invention, the heat pump cooling circuit also includes: a liquid storage tank, the in-vehicle heat exchanger is connected between the liquid outlet of the compressor and one end of the liquid storage tank; a regenerator, the regenerator has a first channel and a second channel for mutual heat exchange, one end of the first channel is connected to the other end of the liquid storage tank, and the other end of the first channel is connected to one end of the fourth heat exchange channel, one end of the second channel is connected to the other end of the fourth heat exchange channel, and the other end of the second channel is connected to the liquid inlet of the compressor.

[0030] According to some embodiments of the present invention, the heat pump cooling circuit also includes: a third control valve, which is connected between the other end of the first channel and the one end of the fourth heat exchange channel, and is used to control the flow rate of the cooling medium flowing from the first channel to the fourth heat exchange channel; a pressure and temperature sensor, which is connected between the other end of the fourth heat exchange channel and the one end of the second channel, and is used to detect the pressure and temperature of the cooling medium flowing out of the fourth heat exchange channel.

[0031] According to a third aspect of the present invention, a vehicle is provided. The vehicle includes a thermal management system according to the second aspect of the present invention.

[0032] The vehicle according to the third aspect embodiment of the present invention can adjust the temperature of the battery pack cooling circuit and the temperature of the heating cooling circuit by utilizing the thermal management system described in the second aspect embodiment of the present invention, realize heat storage and heat release of the battery pack, and balance the battery pack temperature requirements and air conditioning heating requirements.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 is a flow chart of a control method of a thermal management system according to an embodiment of the present invention;

[0036] Figure 2 is another flow chart of a control method of a thermal management system according to an embodiment of the present invention;

[0037] Figure 3 is an overall flow chart of a control method for a thermal management system according to an embodiment of the present invention;

[0038] Figure 4 is another overall flow chart of a control method for a thermal management system according to an embodiment of the present invention;

[0039] Figure 5 is a flow chart of a thermal management system according to an embodiment of the present invention when receiving a battery heating signal;

[0040] Figure 6 is a flow chart of a thermal management system according to an embodiment of the present invention when a battery heating signal is not received and a battery heat storage signal is received;

[0041] Figure 7 is a flow chart of a thermal management system according to an embodiment of the present invention when a battery heating signal is not received and a battery heat release signal is received;

[0042] Figure 8 is a schematic structural diagram of a thermal management system according to an embodiment of the present invention;

[0043] Fig. 9 is another structural schematic diagram of a thermal management system according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 1. Thermal management system;

[0046] 100, engine cooling circuit; 110, engine; 120, thermostat; 121, inlet; 122, first outlet; 123, second outlet; 130, radiator; 140, engine water pump;

[0047] 200, heating and cooling circuit; 210, heating core; 220, electric heater; 230, heating water pump;

[0048] 300, first heat exchanger; 310, first heat exchange channel; 320, second heat exchange channel;

[0049] 400, battery pack cooling circuit; 410, battery pack; 420, first control valve; 421, liquid inlet; 422, first liquid outlet; 423, second liquid outlet; 430, water temperature sensor; 440, battery water pump;

[0050] 500, second control valve; 510, first interface; 520, second interface; 530, third interface; 540, fourth interface;

[0051] 600, heat pump cooling circuit; 610, in-vehicle heat exchanger; 611, first in-vehicle heat exchanger; 612, second in-vehicle heat exchanger; 620, external heat exchanger; 630, compressor; 640, liquid storage tank; 650, regenerator; 651, first channel; 652, second channel; 660, third control valve; 661, pressure and temperature sensor; 662, pressure sensor; 663, temperature sensor;

[0052] 670, fourth control valve; 671, fifth control valve; 680, first on-off valve; 681, second on-off valve; 682, third on-off valve; 683, fourth on-off valve; 690, one-way valve;

[0053] 700, second heat exchanger; 710, third heat exchange channel; 720, fourth heat exchange channel. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0057] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0058] The following describes a control method of a thermal management system 1 according to an embodiment of the present invention with reference to the accompanying drawings.

[0059] like Figure 1-Figure 7 As shown, the control method of the thermal management system 1 according to the embodiment of the present invention includes:

[0060] Heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200;

[0061] Obtain air conditioning and heating demand parameters and / or battery pack temperature parameters;

[0062] The cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is adjusted according to the air conditioning heating demand parameters and / or the battery pack temperature parameters to adjust the heat exchange amount of the battery pack cooling circuit 400 and the heating cooling circuit 200.

[0063] For example, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is adjusted according to at least one of the air conditioning heating demand parameter and the battery pack temperature parameter, and can be operated periodically, that is, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is adjusted once every t time according to at least one of the air conditioning heating demand parameter and the battery pack temperature parameter. Wherein, t can be 5s to 30s, for example, 10s.

[0064] For example, the cooling medium in the embodiment of the present invention may be liquid or gas.

[0065] According to the control method of the thermal management system 1 of the embodiment of the present invention, the battery pack cooling circuit 400 and the heating cooling circuit 200 are heat exchanged, so that the heat of the heating cooling circuit 200 can be transferred to the battery pack cooling circuit 400. When the temperature of the battery pack 410 is too low, the heat can be transferred to the battery pack cooling circuit 400 through the heating cooling circuit 200, thereby increasing the temperature of the battery pack 410 so that the battery pack 400 is in an efficient working temperature range.

[0066] In addition, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is adjusted according to the air conditioning heating demand parameters and / or the battery pack temperature parameters to adjust the heat exchange amount of the battery pack cooling circuit 400 and the heating cooling circuit 200.

[0067] That is to say, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 can be adjusted according to the air-conditioning and heating demand parameters, or the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 can be adjusted according to the battery pack temperature parameters. Alternatively, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 can be adjusted in combination with the air-conditioning and heating demand parameters and the battery pack temperature parameters.

[0068] In this way, when the air-conditioning heating demand is high, that is, the temperature inside the car is low and more heat is needed to be provided to the car through air conditioning, the cooling medium flow rate of the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 can be reduced, so that more heat in the heating cooling circuit 200 can be transferred to the passenger compartment to heat the passenger compartment, thereby meeting the heating demand in the car and improving the heating efficiency.

[0069] Alternatively, when the heating demand of the battery pack 410 is high, that is, the temperature of the battery pack 410 is low and the temperature of the battery pack 410 needs to be significantly increased, the cooling medium flow rate of the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 can be increased, so that more heat in the heating cooling circuit 200 is transferred to the battery pack cooling circuit 400, so as to heat the battery pack 410, thereby meeting the heating demand of the battery pack 410 and allowing the battery pack 410 to remain in an efficient working temperature range. Of course, when the heating demand of the battery pack 410 is low, the cooling medium flow rate of the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 can be adjusted to be reduced, so that most of the heat can be stored in the heating cooling circuit 200, and a small amount of heat can be transferred to the battery pack cooling circuit 400 to heat the battery pack 410. At this time, the air conditioner can control the switch size of the heating air outlet to control the heat transferred from the heating cooling circuit 200 to the vehicle, so as to meet the heating demand in the vehicle without causing the temperature in the vehicle to be too high. At the same time, it can also avoid the temperature of the battery pack 410 being too high, so that the battery pack 410 can also be maintained in an efficient working temperature range.

[0070] Alternatively, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange can be adjusted in combination with the air-conditioning heating demand parameters and the battery pack temperature parameters. In this way, the thermal management system 1 can coordinate the air-conditioning heating demand and the heating demand of the battery pack 410, so as to meet the heating demand in the vehicle while keeping the battery pack 410 in an efficient working range. In addition, the redundant heat can be transferred to the battery pack 410 through the heating cooling circuit 200, and then stored in the battery pack 410, so that the heat stored in the battery pack 410 can be reused to heat the vehicle later, which is beneficial to saving energy.

[0071] In this way, the control method of the thermal management system 1 according to the embodiment of the present invention can adjust the temperature of the battery pack cooling circuit 400 and the heating cooling circuit 200, realize the heating, heat storage and heat release of the battery pack 410, maximize the heat storage of the battery pack 410 while keeping the battery pack 410 in an efficient working temperature range, meet the air conditioning and heating requirements, and balance the temperature requirements of the battery pack 410 and the air conditioning and heating requirements.

[0072] In some specific embodiments of the present invention, Figure 2As shown, the engine cooling circuit 100 and the heating cooling circuit 200 are connected, that is, the engine cooling circuit 100 and the heating cooling circuit 200 can be a circuit, so that the cooling medium of the engine cooling circuit 100 and the cooling medium in the heating cooling circuit 200 can circulate with each other, and the cooling medium in the engine cooling circuit 100 can directly heat the interior of the vehicle through the heating cooling circuit 200, or the cooling medium in the engine cooling circuit 100 can transfer heat to the battery pack cooling circuit 400 through the heating cooling circuit 200. Compared with the prior art of exchanging heat between the engine cooling circuit and the heating cooling circuit and then heating the interior of the vehicle through the heating cooling circuit, the cooling medium in the engine cooling circuit 100 in the embodiment of the present invention can directly heat the interior of the vehicle, with less heat loss and better heating effect, which can better meet the heating needs.

[0073] In some specific embodiments of the present invention, Figure 3 As shown, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is adjusted according to the air conditioning heating demand parameters and / or the battery pack temperature parameters, including: if the battery pack temperature parameters meet the upper limit conditions of the battery pack heat storage, then the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is reduced.

[0074] That is to say, when the battery pack temperature parameters meet the upper limit condition of the battery pack heat storage, the temperature of the battery pack 410 is already high. At this time, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange can be controlled to be reduced, thereby reducing the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200, and reducing the heat transferred from the heating cooling circuit 200 to the battery pack cooling circuit 400, thereby preventing the temperature of the battery pack 410 from continuing to rise, or lowering the temperature of the battery pack 410, which is beneficial to improving the safety of the battery pack 410 and can keep the battery pack 410 in an efficient working temperature range.

[0075] In some specific embodiments of the present invention, Figure 4 As shown, if the battery pack temperature parameters meet the upper limit conditions of the battery pack heat storage, including: the temperature of the battery pack 410 is greater than the first preset temperature value; and / or the temperature of the cooling medium at the inlet of the battery pack 410 is greater than the second preset temperature value.

[0076] That is to say, when the temperature of the battery pack 410 is greater than the first preset temperature value, it is judged that the battery pack temperature parameters meet the upper limit condition of the battery pack heat storage; or, when the temperature of the cooling medium at the inlet of the battery pack 410 is greater than the second preset temperature value, the battery pack temperature parameters meet the upper limit condition of the battery pack heat storage; or again, when the temperature of the battery pack 410 is greater than the first preset temperature and the temperature of the cooling medium at the inlet of the battery pack 410 is greater than the second preset temperature value, it is judged that the battery pack temperature parameters meet the upper limit condition of the battery pack heat storage.

[0077] For example, the first preset temperature value can be 25℃~30℃. For example, the first preset temperature value can be 30℃. When the temperature of the battery pack 410 is less than 30℃, the temperature of the battery pack 410 is relatively low, and the battery pack 410 can continue to be heated or the battery pack 410 can be used to store heat. When the temperature of the battery pack 410 is greater than 30℃, it means that the temperature of the battery pack 410 is already high. At this time, it is necessary to reduce the flow rate of the cooling medium for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200, thereby reducing the heat exchange amount of the battery pack cooling circuit 400 and the heating cooling circuit 200, thereby avoiding the temperature of the battery pack 410 from being too high, which is beneficial to improving the safety of the battery pack 410 and can keep the battery pack 410 in an efficient working temperature range.

[0078] The second preset temperature value can be 40℃~50℃. For example, the second preset temperature value can be 50℃. When the temperature of the cooling medium at the inlet of the battery pack 410 is less than 50℃, the temperature of the cooling medium at the inlet of the battery pack 410 is low, and the cooling medium at this temperature can continue to be used to heat the battery pack 410. When the temperature of the cooling medium at the inlet of the battery pack 410 is greater than 50℃, it means that the temperature of the cooling medium at the inlet of the battery pack 410 is already high. At this time, it is necessary to reduce the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange, thereby reducing the heat exchange amount of the battery pack cooling circuit 400 and the heating cooling circuit 200, thereby avoiding the cooling medium temperature in the battery pack cooling circuit 400 from being too high, that is, avoiding the cooling medium temperature at the inlet of the battery pack 410 from being too high, which is beneficial to improving the safety of the battery pack 410 and can keep the battery pack 410 in a temperature range of efficient operation.

[0079] In some specific embodiments of the present invention, Figure 3 As shown, the cooling medium flow rate for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 is adjusted according to the air-conditioning heating demand parameter and / or the battery pack temperature parameter, and also includes: if the battery pack temperature parameter does not meet the battery pack heat storage upper limit condition, it is determined whether the air-conditioning heating demand parameter meets the insufficient heating condition; if so, the cooling medium flow rate for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 is reduced.

[0080] That is to say, when the temperature of the battery pack 410 has not reached the upper limit of the battery pack heat storage condition but the heating is insufficient, priority is given to in-vehicle heating, that is, reducing the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange, and reducing the heat exchange amount of the heating cooling circuit 200 and the battery pack cooling circuit 400, so that the heat of the engine cooling circuit 100 or the heat of the heating cooling circuit 200 itself can be transferred more to the interior of the vehicle to heat the interior of the vehicle.

[0081] Specifically, when the battery pack temperature parameter does not meet the upper limit condition of the battery pack heat storage, and the air conditioning heating demand parameter meets the insufficient heating condition, the opening of the first control valve 420 can be controlled to decrease by ΔR to reduce the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange, that is, each time it is detected that the battery pack temperature parameter does not meet the upper limit condition of the battery pack heat storage, and the air conditioning heating demand parameter meets the insufficient heating condition, the opening of the first control valve 420 is reduced by ΔR. Among them, ΔR can be 2% of the maximum opening of the first control valve 420. Of course, ΔR can also be less than 2% or greater than 2%. The specific value can be adjusted according to the flow rate of the cooling medium and the temperature of the cooling medium.

[0082] In some specific embodiments of the present invention, Figure 4 As shown, judging whether the air conditioning heating demand parameters meet the heating shortage condition includes:

[0083] Determine whether the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is not less than a first preset difference;

[0084] If so, the air conditioning heating demand parameters meet the heating shortage condition;

[0085] If not, the air conditioning heating demand parameters do not meet the heating shortage condition.

[0086] For example, the first preset difference can be 5℃~10℃. For example, the first preset difference can be 5℃. When the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is less than 5℃, the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is small, indicating that the thermal management system 1 can meet the heating demand of the air conditioner. When the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is not less than 5℃, the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is large, that is, the actual air outlet temperature of the air conditioner is low, and the air conditioning heating demand parameter meets the insufficient heating condition. The thermal management system 1 cannot meet the heating demand of the air conditioner. At this time, it is necessary to reduce the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange to reduce the heat transferred from the heating cooling circuit 200 to the battery pack cooling circuit 400, so that the waste heat of the engine 110 can be more passed through the heating cooling circuit 200 for heating the vehicle interior to meet the heating demand in the vehicle.

[0087] In some specific embodiments of the present invention, Figure 3 As shown, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange is adjusted according to the air conditioning heating demand parameter and / or the battery pack temperature parameter, and also includes:

[0088] If the air conditioning heating demand parameter does not meet the heating shortage condition, then determine whether the air conditioning heating demand parameter meets the heating surplus condition;

[0089] If yes, increase the cooling medium flow rate for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200;

[0090] If not, the flow rate of the cooling medium for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 is kept unchanged.

[0091] That is to say, when the temperature of the battery pack 410 has not reached the upper limit of the battery pack heat storage condition but there is surplus heating, the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange can be increased, and the heat exchange capacity of the heating cooling circuit 200 and the battery pack cooling circuit 400 can be increased, so that the heat of the engine cooling circuit 100 and the heat of the heating cooling circuit 200 itself can be transferred to the battery pack cooling circuit 400, and the battery pack 410 can be heated, so that the battery pack 410 can be in an efficient working temperature range, and the battery pack 410 can be used to store heat.

[0092] In addition, when the temperature of the battery pack 410 does not reach the upper limit of the battery pack heat storage condition, and the air-conditioning heating does not meet the insufficient heating condition and does not meet the surplus heating condition, that is, the air-conditioning heating is just right, then the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange can be kept unchanged, that is, the heat exchange amount of the battery pack cooling circuit 400 and the heating cooling circuit 200 is kept unchanged, so that the air-conditioning heating can be kept moderate to meet the heating needs in the vehicle and the heat exchange amount can be kept to heat the battery pack 410.

[0093] Specifically, when the battery pack temperature parameter does not meet the upper limit condition of the battery pack heat storage, and the air conditioning heating demand parameter meets the heating surplus condition, the opening of the first control valve 420 can be controlled to increase by ΔR to increase the cooling medium flow rate of the battery pack cooling circuit 400 and the heating cooling circuit 200 for heat exchange, that is, each time it is detected that the battery pack temperature parameter does not meet the upper limit condition of the battery pack heat storage, and the air conditioning heating demand parameter meets the heating surplus condition, the opening of the first control valve 420 is increased by ΔR. Among them, ΔR can be 2% of the maximum opening of the first control valve 420. Of course, ΔR can also be less than 2% or greater than 2%. The specific value can be adjusted according to the flow rate of the cooling medium and the temperature of the cooling medium.

[0094] In some specific embodiments of the present invention, Figure 4 As shown, judging whether the air conditioning heating demand parameters meet the heating surplus condition includes:

[0095] Determining whether the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is not greater than a second preset difference;

[0096] If so, the air conditioning and heating demand parameters meet the heating surplus condition;

[0097] If not, the air conditioning heating demand parameters do not meet the heating surplus conditions.

[0098] For example, the second preset difference may be 0°C to 5°C. For example, the first preset difference may be 3°C. When the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is greater than 3°C, the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is large, indicating that the thermal management system 1 cannot meet the heating demand of the air conditioner. When the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is greater than 3°C, the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is small, that is, the difference between the actual air outlet temperature of the air conditioner and the target air outlet temperature of the air conditioner is small, and the air conditioning heating demand parameter meets the heating surplus condition. The thermal management system 1 can meet the heating demand of the air conditioner. At this time, the cooling medium flow rate of the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200 can be increased to increase the heat transferred from the heating cooling circuit 200 to the battery pack cooling circuit 400, so that the waste heat of the engine 110 can be more heated for the battery pack 410 through the battery pack cooling circuit 400, so that the battery pack 410 can be in the temperature range of efficient operation, and the battery pack 410 can be used to store heat.

[0099] In addition, it should be noted that, in addition to the heat transferred from the engine cooling circuit 100 to the heating cooling circuit 200, which will affect the air outlet temperature of the air conditioner, other components are usually used to process the air outlet of the air conditioner to avoid the air outlet temperature of the air conditioner being too high. In other words, the actual air outlet temperature of the air conditioner will not be higher than the target air outlet temperature of the air conditioner. When the air conditioning heating is sufficient, the actual air outlet temperature of the air conditioner will fluctuate around the target air outlet temperature of the air conditioner. Therefore, by comparing the target air outlet temperature of the air conditioner with the actual air outlet temperature of the air conditioner, when the difference between the two is not greater than the second preset difference, it is considered that the actual air outlet temperature of the air conditioner is near the target air outlet temperature of the air conditioner, and the air conditioning heating is sufficient.

[0100] In some specific embodiments of the present invention, Figure 3 and Figure 4As shown, the target air outlet temperature of the air conditioner is calculated based on the outside ambient temperature, the inside ambient temperature and the air conditioner set temperature. In this way, a suitable target air outlet temperature of the air conditioner can be calculated in combination with the outside ambient temperature, the inside ambient temperature and the air conditioner set temperature to improve the air outlet comfort of the air conditioner and provide a better user experience.

[0101] In some specific embodiments of the present invention, Figure 4-Figure 6 As shown, upon receiving the battery heating signal, the battery water pump 440 of the battery pack cooling circuit 400 operates at a first preset speed;

[0102] When the battery heating signal is not received and the battery heat storage signal is received, the battery water pump 440 of the battery pack cooling circuit 400 operates at a second preset speed;

[0103] When the battery heating signal is not received and the battery heat release signal is received, the battery water pump 440 of the battery pack cooling circuit 400 runs at a third preset speed; wherein the first preset speed and the third preset speed are both greater than the second preset speed.

[0104] For example, the first preset speed may be 100% of the rated speed, the second preset speed may be 20% of the rated speed, and the third preset speed may be 100% of the rated speed. Of course, the first preset speed and the third preset speed may also be other higher speed values, for example, the first preset speed and the third preset speed may be 90% of the rated speed or 95% of the rated speed, and the first preset speed and the third preset speed may be equal or unequal, and the second preset speed may also be other lower values, such as 15% of the rated speed or 25% of the rated speed.

[0105] In this way, the first preset rotation speed can be higher, so that the cooling medium in the battery pack cooling circuit 400 can flow quickly, so that the cooling medium in the battery pack cooling circuit 400 and the cooling medium in the heating cooling circuit 200 can quickly exchange heat, so as to increase the rate at which heat is transferred from the heating cooling circuit 200 to the battery pack cooling circuit 400, and the battery pack 410 is heated faster.

[0106] Furthermore, the third preset rotation speed may also be relatively high, thereby enabling the cooling medium in the battery pack cooling circuit 400 to flow rapidly, so that the cooling medium in the battery pack cooling circuit 400 and the cooling medium in the heat pump cooling circuit 600 can exchange heat rapidly, thereby increasing the rate at which heat is transferred from the battery pack cooling circuit 400 to the heat pump cooling circuit 600, and allowing the battery pack 410 to release heat more quickly, thereby enabling the heat stored in the battery pack 410 to be used more quickly to heat the interior of the vehicle.

[0107] In addition, the second preset speed can be lower, which can slow down the flow of the cooling medium in the battery pack cooling circuit 400, so that the cooling medium in the battery pack cooling circuit 400 and the cooling medium in the heating cooling circuit 200 can smoothly exchange heat. In this way, the heat in the heating cooling circuit 200 can be transferred to the battery pack cooling circuit 400 so that the battery pack 410 can store heat, and at the same time, the energy consumption of the battery water pump 440 can be reduced, further reducing the energy consumption of the thermal management system 1.

[0108] A thermal management system 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0109] like Figure 8 and Fig. 9 As shown, the thermal management system 1 includes a heating and cooling circuit 200, a first heat exchanger 300, a battery pack cooling circuit 400 and a controller. The heating and cooling circuit 200 is suitable for heat exchange with the passenger compartment. The controller may be a vehicle controller, or the controllers may be electrically connected to each other.

[0110] The first heat exchanger 300 has a first heat exchange channel 310 and a second heat exchange channel 320 for exchanging heat with each other. The first heat exchange channel 310 is connected to the heating cooling circuit 200, and the second heat exchange channel 320 is connected to the battery pack cooling circuit 400. The battery pack cooling circuit 400 is suitable for heat exchange with the battery pack 410. The battery pack cooling circuit 400 includes a first control valve 420. The controller is connected to the first control valve 420. The controller adjusts the opening of the first control valve 420 according to the air conditioning heating demand parameter and / or the battery pack temperature parameter to control the flow of the cooling medium for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200, so as to adjust the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200.

[0111] The heating-cooling medium water circuit 200 may be provided with a warm air water pump 230 .

[0112] Therefore, when the air-conditioning heating demand is high, that is, the temperature inside the car is low and more heat is needed to be provided to the car through air conditioning, the controller can adjust the opening of the first control valve 420 to reduce the flow rate of the cooling medium exchanged between the battery pack cooling circuit 400 and the heating cooling circuit 200, thereby reducing the heat exchange from the heating cooling circuit 200 to the battery pack cooling circuit 400, so that more heat from the heating cooling circuit 200 can be used to heat the car through the air conditioning, so as to meet the heating demand in the car and improve the heating efficiency.

[0113] Alternatively, when the heating demand of the battery pack 410 is high, that is, the temperature of the battery pack 410 is low and the temperature of the battery pack 410 needs to be significantly increased, the controller can adjust the opening of the first control valve 420 to increase the flow rate of the cooling medium for heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200, thereby increasing the heat exchange from the heating cooling circuit 200 to the battery pack cooling circuit 400, and allowing more heat from the heating cooling circuit 200 to heat the battery pack 410 through the battery pack cooling circuit 400, thereby meeting the heating demand of the battery pack 410 and allowing the battery pack 410 to remain in an efficient operating temperature range.

[0114] Alternatively, the controller can adjust the opening of the first control valve 420 in combination with the air-conditioning heating demand parameters and the battery pack temperature parameters. In this way, the thermal management system 1 can coordinate the air-conditioning heating demand and the heating demand of the battery pack 410 to meet the heating demand in the vehicle while keeping the battery pack 410 in an efficient working range. The redundant heat can be transferred to the battery pack 410 through the heating cooling circuit 200, and then stored in the battery pack 410, so that the heat stored in the battery pack 410 can be reused to heat the vehicle later, which is beneficial to saving energy.

[0115] The thermal management system 1 according to the embodiment of the present invention is capable of adjusting the temperature of the battery pack cooling circuit 400 and the temperature of the heating cooling circuit 200, and is capable of heating, releasing and storing heat in the battery pack 410, while maximizing the heat storage of the battery pack 410 and maintaining the battery pack 410 in an efficient operating temperature range, meeting the air conditioning and heating requirements, and balancing the heat requirements and heating requirements of the battery pack 410.

[0116] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the battery pack cooling circuit 400 also includes a battery pack 410, a water temperature sensor 430 and a battery pack temperature sensor (not shown in the figure).

[0117] The first control valve 420 has a liquid inlet 421 and a first liquid outlet 422. The liquid inlet 421, the first liquid outlet 422, the second heat exchange channel 320 and the battery pack 410 are connected in series. The water temperature sensor 430 is provided at the battery pack 410 and connected to the controller. For example, the water temperature sensor 430 can be provided upstream of the battery pack 410 to detect the temperature of the cooling medium at the inlet of the battery pack 410. The battery pack temperature sensor is connected to the controller, and the battery pack temperature sensor is provided at the battery pack 410 to detect the temperature of the battery pack 410. The controller adjusts the opening between the liquid inlet 421 and the first liquid outlet 422 of the first control valve 420 according to the air conditioning and heating demand parameters and / or the battery pack temperature parameters.

[0118] In this way, the controller can control the opening between the first control valve 420 and the first liquid outlet 422. When the air-conditioning heating demand is high, the controller can reduce the opening between the first control valve 420 and the first liquid outlet 422, thereby reducing the flow rate of the cooling medium flowing through the second heat exchange channel 320, so as to reduce the heat exchange from the heating cooling circuit 200 to the battery pack cooling circuit 400, so that more heat from the heating cooling circuit 200 can be transferred to the interior of the vehicle to heat the interior, meet the heating demand in the vehicle, and improve the heating efficiency.

[0119] When the heating demand of the battery pack 410 is high, the controller increases the opening between the first control valve 420 and the first liquid outlet 422, thereby increasing the flow rate of the cooling medium flowing through the second heat exchange channel 320, so as to increase the heat exchange from the heating cooling circuit 200 to the battery pack cooling circuit 400, so that more heat from the heating cooling circuit 200 can be transmitted through the battery pack cooling circuit 400 to heat the battery pack 410, so as to meet the heating demand of the battery pack 410 and enable the battery pack 410 to remain in an efficient operating temperature range.

[0120] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the battery pack cooling circuit 400 further includes a battery water pump 440 , which is connected in series with the battery pack 410 and is connected to the controller.

[0121] Wherein, when the controller receives the battery heating signal, the battery water pump 440 operates at a first preset speed;

[0122] When the controller does not receive the battery heating signal but receives the battery heat storage signal, the battery water pump 440 operates at a second preset speed;

[0123] When the controller does not receive the battery heating signal but receives the battery heat release signal, the battery water pump 440 runs at a third preset speed, and both the first preset speed and the third preset speed are greater than the second preset speed.

[0124] For example, the first preset speed may be 100% of the rated speed, the second preset speed may be 20% of the rated speed, and the third preset speed may be 100% of the rated speed. In this way, the first preset speed may be relatively high, so that the cooling medium in the battery pack cooling circuit 400 can flow quickly, so that the cooling medium in the battery pack cooling circuit 400 and the cooling medium in the heating cooling circuit 200 can quickly exchange heat, so as to increase the rate at which the heating cooling circuit 200 transfers heat to the battery pack cooling circuit 400, and the battery pack 410 heats up faster. In addition, the second preset speed may be relatively low, so that the flow of the cooling medium in the battery pack cooling circuit 400 can be slowed down, so that the cooling medium in the battery pack cooling circuit 400 and the cooling medium in the heating cooling circuit 200 can exchange heat smoothly, so that the heat in the heating cooling circuit 200 can be transferred to the battery pack cooling circuit 400, so that the battery pack 410 can store heat, and at the same time, the energy consumption of the battery water pump 440 can be reduced, further reducing the energy consumption of the thermal management system 1. In addition, the third preset speed can be higher, so that the cooling medium in the battery pack cooling circuit 400 can flow quickly, so that the cooling medium in the battery pack cooling circuit 400 and the cooling medium in the heat pump cooling circuit 600 can quickly exchange heat, so as to increase the rate at which the battery pack cooling circuit 400 transfers heat to the heat pump cooling circuit 600, and the battery pack 410 releases heat faster, so as to more quickly utilize the heat stored in the battery pack 410 to heat the interior of the vehicle.

[0125] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the first control valve 420 also has a second liquid outlet 423. The first liquid outlet 422 is connected in series with the second heat exchange channel 320 and then connected in parallel with the second liquid outlet 423. The first control valve 420 has a first state, a second state and a third state.

[0126] When the first control valve 420 is in the first state, the liquid inlet 421 is connected to the first liquid outlet 422, and the liquid inlet 421 is disconnected from the second liquid outlet 423. When the first control valve 420 is in the second state, the liquid inlet 421 is connected to the second liquid outlet 423, and the liquid inlet 421 is disconnected from the first liquid outlet 422. When the first control valve 420 is in the third state, the liquid inlet 421 is connected to the first liquid outlet 422 and the second liquid outlet 423, respectively.

[0127] Thus, when the first control valve 420 is in the first state, the controller can adjust the opening between the liquid inlet 421 and the first liquid outlet 422 to adjust the flow of the cooling medium flowing from the first liquid outlet 422 to the second heat exchange channel 320. When the first control valve 420 is in the second state, the controller can adjust the opening between the liquid inlet 421 and the second liquid outlet 423 to adjust the flow of the cooling medium flowing from the second liquid outlet 423 to the battery pack 410. When the first control valve 420 is in the third state, the controller can simultaneously adjust the opening between the liquid inlet 421 and the first liquid outlet 422, and the opening between the liquid inlet 421 and the second liquid outlet 423 to adjust the ratio of the cooling medium flowing through the first liquid outlet 422 and the cooling medium flowing through the second liquid outlet 423, so as to control the flow of the cooling medium flowing through the second heat exchange channel 320, so as to effectively adjust the heat exchange between the battery pack cooling circuit 400 and the heating cooling circuit 200.

[0128] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the thermal management system 1 also includes an engine cooling circuit 100, wherein the cooling medium in the engine cooling circuit 100 is suitable for heat exchange with the engine 110, and the heating cooling circuit 200 can be selectively connected to the engine cooling circuit 100, wherein the engine cooling circuit 100 can be provided with an engine water pump 140, so that the cooling medium in the engine cooling circuit 100 can directly heat the interior of the vehicle through the heating cooling circuit 200, with less heat loss, better heating effect, and better ability to meet heating needs.

[0129] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the thermal management system 1 further includes a second control valve 500 .

[0130] The second control valve 500 is provided with a first interface 510, a second interface 520, a third interface 530 and a fourth interface 540. The first interface 510 and the second interface 520 are connected to the engine cooling circuit 100, and the third interface 530 and the fourth interface 540 are connected to the heating cooling circuit 200. The second control has a switchable fourth state and a fifth state.

[0131] When the second control valve 500 is in the fourth state, the first interface 510 is connected to the second interface 520, the third interface 530 is connected to the fourth interface 540, and the engine cooling circuit 100 is disconnected from the heating and cooling circuit 200. When the second control valve 500 is in the fifth state, the first interface 510 is connected to the fourth interface 540, the second interface 520 is connected to the third interface 530, and the engine cooling circuit 100 is connected to the heating and cooling circuit 200.

[0132] Therefore, when the second control valve 500 is in the fourth state, the engine cooling circuit 100 and the heating cooling circuit 200 are disconnected, that is, the engine cooling circuit 100 is a separate cooling circuit, and the heating cooling circuit 200 is a separate cooling circuit. The cooling medium in the engine cooling circuit 100 forms a separate cooling circuit circulation through the first interface 510 and the second interface 520, and the cooling medium in the heating cooling circuit 200 forms a separate cooling circuit circulation through the third interface 530 and the fourth interface 540. No heat exchange occurs between the engine cooling circuit 100 and the heating cooling circuit 200, that is, at this time, it is not conducive to the waste heat of the engine 110 for heating the passenger compartment in and out.

[0133] When the second control valve 500 is in the fifth state, the engine cooling circuit 100 and the heating cooling circuit 200 are connected, that is, the engine cooling circuit 100 and the heating cooling circuit 200 form an integral cooling circuit, and the cooling medium in the engine cooling circuit 100 and the cooling medium in the heating cooling circuit 200 form a cooling circuit circulation through the first interface 510, the second interface 520, the third interface 530 and the fourth interface 540 in turn. The cooling medium in the engine cooling circuit 100 can directly pass through the heating cooling circuit 200 to heat the passenger compartment in and out, so as to reduce energy loss and improve heating efficiency.

[0134] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the heating and cooling circuit 200 includes a heater core 210 and an outlet air temperature sensor.

[0135] The heater core 210, the first heat exchange channel 310, the third interface 530 and the fourth interface 540 are connected in series. The heater core 210 is used for heat exchange with the passenger compartment. The outlet air temperature sensor (not shown in the figure) and the controller (not shown in the figure) are connected. The outlet air temperature sensor is used to detect the outlet air temperature of the heater core 210.

[0136] In this way, when the second control valve 500 is in the second state, the cooling medium in the engine cooling circuit 100 can flow from the third interface 530 and the second interface 520 into the heating cooling circuit 200, and then flow through the heater core 210, and release heat to the vehicle through the heater core 210, thereby realizing heat exchange with the passenger compartment to heat the passenger compartment, and then flow back to the engine cooling circuit 100 through the first interface 510 and the fourth interface 540, thereby realizing the connection between the engine cooling circuit 100 and the heating cooling circuit 200, and then the cooling medium in the engine cooling circuit 100 can be used to directly heat the passenger compartment.

[0137] In addition, the air outlet temperature sensor can monitor the air outlet temperature of the air conditioner in real time and transmit it to the controller. After calculating based on the temperature value fed back by the air outlet temperature sensor and the target air outlet temperature of the air conditioner, the controller adjusts the opening of the first control valve 420 to accurately adjust the heat exchange amount of the battery pack cooling circuit 400 and the heating cooling circuit 200, so as to ensure sufficient heating and keep the battery pack 410 in an efficient working temperature range.

[0138] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the heating and cooling loop 200 further includes an electric heater (Positive temperature coefficient, PTC) 220 .

[0139] The electric heater 220 is connected to the control, and the electric heater 220 is connected in series with the warm air core 210 to heat the cooling medium in the heating and cooling circuit 200 .

[0140] In this way, when the engine 110 is shut down or the preheating of the engine 110 cannot meet the heating demand of the air conditioner, the controller can control the output power of the electric heater 220 to increase the temperature of the cooling medium in the heating cooling loop 200, thereby meeting the heating demand of the air conditioner. Of course, after the electric heater 220 heats the cooling medium in the heating cooling loop 200, the battery pack cooling loop 400 can also perform heat exchange with the heating cooling loop 200 through the first heat exchanger 300, that is, the battery pack cooling loop 400 is heated by the electric heater 220, and the electric heater 220 can indirectly heat the battery pack 410.

[0141] Among them, when it is necessary to heat the battery pack 410 and not to heat the passenger compartment, the electric heater 220 can be turned on and the air-conditioning outlet of the passenger compartment can be closed, so that the heat of the heating cooling circuit 200 does not flow to the passenger compartment. At the same time, the battery pack cooling circuit 400 can exchange heat with the heating cooling circuit 200 to heat the battery pack 410.

[0142] In some specific embodiments of the present invention, Figure 7 As shown, the engine cooling circuit 100 includes an engine 110 , a thermostat 120 , and a radiator 130 .

[0143] The engine 110 is in communication with the first interface 510, the thermostat 120 is provided with an inlet 121, a first outlet 122 and a second outlet 123, the inlet 121 is connected to the engine 110, the first outlet 122 is in communication with the second interface 520, and the radiator 130 is in communication with the engine 110 and the second outlet 123, respectively. The thermostat 120 adjusts the flow of the cooling medium between the engine 110 and the radiator 130.

[0144] In this way, when the temperature of the engine 110 reaches the upper limit, in order to protect the engine 110, the cooling medium in the engine cooling circuit 100 can be guided to the radiator 130 through the second outlet 123 through the thermostat 120, and then the radiator 130 can be used to quickly release the heat of the cooling medium in the engine cooling circuit 100 to cool the engine 110.

[0145] In some specific embodiments of the present invention, Figure 8 and Fig. 9 As shown, the thermal management system 1 further includes a heat pump cooling circuit 600 and a second heat exchanger 700 .

[0146] The heat pump cooling circuit 600 includes a compressor, an in-vehicle heat exchanger 610 and an out-vehicle heat exchanger 620. The second heat exchanger 700 has a third heat exchange channel 710 and a fourth heat exchange channel 720 for mutual heat exchange. The third heat exchange channel 710 is connected to the battery pack cooling circuit 400, and the fourth heat exchange channel 720 is connected to the heat pump cooling circuit 600. The heat pump cooling circuit 600 and the battery pack cooling circuit 400 perform heat exchange through the second heat exchanger 700.

[0147] In this way, when the cooling medium in the engine cooling circuit 100 and the cooling medium in the heating cooling circuit 200 are not flowing, the heat pump cooling circuit 600 can exchange heat with the battery pack cooling circuit 400, and then transfer the heat stored in the battery pack 410 to the heat pump cooling circuit 600, that is, use the stored heat of the battery pack 410 to heat the vehicle interior.

[0148] In some specific embodiments of the present invention, Fig. 9 As shown, the heat pump cooling circuit 600 further includes a liquid storage tank 640 and a regenerator 650 .

[0149] Specifically, the in-vehicle heat exchanger 620 is connected between the liquid outlet of the compressor 630 and one end of the liquid storage tank 640, and the regenerator 650 has a first channel 651 and a second channel 652 for mutual heat exchange, one end of the first channel 651 is connected to the other end of the liquid storage tank 640, and the other end of the first channel 651 is connected to one end of the fourth heat exchange channel 720, one end of the second channel 652 is connected to the other end of the fourth heat exchange channel 720, and the other end of the second channel 652 is connected to the liquid inlet of the compressor 630.

[0150] The first channel 651 of the regenerator 650 may be a high-pressure channel, and the second channel 652 may be a low-pressure channel.

[0151] In this way, when the battery pack cooling circuit 400 and the heat pump cooling circuit 600 perform heat exchange, the refrigerant can flow out of the compressor 630, and flow through the in-vehicle heat exchanger 610, the liquid storage tank 640, the first channel 651, the fourth heat exchange channel 720 and the second channel 652 in sequence before flowing back to the compressor 630. The heat in the battery pack cooling circuit 400 can be transferred to the heat pump cooling circuit 600 through the second heat exchanger 700. At this time, the in-vehicle heat exchanger 610 acts as a condenser to release heat to the interior of the vehicle, and the second heat exchanger 700 acts as an evaporator. The heat pump cooling circuit 600 absorbs the heat in the battery pack cooling circuit 400 through the second heat exchanger 700, so that the heat pump cooling circuit 600 can use the heat of the battery pack cooling circuit 400 to heat the interior of the vehicle.

[0152] Furthermore, by providing a heat regenerator 650, the cooling medium flowing back to the compressor 630 from the second channel 652 can exchange heat with the cooling medium in the first channel 651, thereby increasing the temperature of the cooling medium flowing back to the compressor 630, and forming a high-temperature and high-pressure refrigerant after being pressurized by the compressor 630. Moreover, the heat of the cooling medium in the first channel 651 can be recovered after heat exchange with the cooling medium flowing through the second channel 652, thereby improving the energy recovery rate of the thermal management system 1, which is beneficial to reducing the energy loss of the thermal management system 1 and achieving higher energy utilization.

[0153] In some specific embodiments of the present invention, Fig. 9 As shown, the heat pump cooling circuit 600 further includes a third control valve 660 and a pressure and temperature sensor 661 .

[0154] Specifically, the third control valve 660 is connected between the other end of the first channel 651 and one end of the fourth heat exchange channel 720, and is used to control the flow rate of the cooling medium flowing from the first channel 651 to the fourth heat exchange channel 720. The pressure and temperature sensor 661 is connected between the other end of the fourth heat exchange channel 720 and one end of the second channel 652, and is used to detect the pressure and temperature of the cooling medium flowing out of the fourth heat exchange channel 720.

[0155] In this way, the thermal management system 1 can adjust the speed of the compressor 630 according to the temperature of the cooling medium flowing out of the fourth heat exchange channel 720, and can calculate the superheat of the heat pump cooling circuit 600 according to the pressure and temperature of the cooling medium flowing out of the fourth heat exchange channel 720, and then can adjust the opening of the third control valve 660 according to the superheat of the heat pump cooling circuit 600 to adjust the flow of the cooling medium flowing from the first channel 651 to the fourth heat exchange channel 720. Among them, the third control valve 660 can be an expansion valve or a throttle valve.

[0156] In addition, it should be noted that the in-vehicle heat exchanger 610 may include a first in-vehicle heat exchanger 611 and a second in-vehicle heat exchanger 612, one end of the first in-vehicle heat exchanger 611 is connected to the liquid outlet of the compressor 630, and the other end of the first in-vehicle heat exchanger 611 is connected to one end of the first channel 651 and the external heat exchanger 620, and the second heat exchanger 700 can be connected between the other end of the first channel 651 and one end of the second channel 652.

[0157] In this way, when the thermal management system 1 uses the heat pump cooling circuit 600 to heat the passenger compartment, the cooling medium flowing out of the compressor 630 can flow through the first in-vehicle heat exchanger 611, the outdoor heat exchanger 620 and the second in-vehicle heat exchanger 612 in sequence and then flow back to the compressor 630. At this time, the first in-vehicle heat exchanger 611 acts as a condenser to release heat into the vehicle, and the outdoor heat exchanger 620 acts as an evaporator to absorb heat outside the vehicle, so that the cooling medium becomes high temperature and then flows back to the compressor 630, realizing the heating cycle.

[0158] When the thermal management system 1 utilizes the heat pump cooling circuit 600 to cool the passenger compartment, the cooling medium flowing out of the compressor 630 can flow through the first in-vehicle heat exchanger 611, the external heat exchanger 620 and the second in-vehicle heat exchanger 612 in sequence and then flow back to the compressor 630. At this time, the first in-vehicle heat exchanger 611 can act as a pipeline, that is, it does not absorb heat from the vehicle nor release heat to the vehicle. The external heat exchanger 620 acts as a condenser to release heat to the outside of the vehicle. The second in-vehicle heat exchanger 612 acts as an evaporator to absorb heat from the vehicle to cool the interior of the vehicle, and the cooling medium becomes high temperature before flowing back to the compressor 630, thereby realizing a refrigeration cycle.

[0159] In addition, if Fig. 9 As shown, the heat pump cooling circuit 600 can also be provided with a pressure sensor 662 and a temperature sensor 663. The pressure sensor 662 is connected between the first in-vehicle heat exchanger 611 and the first channel 651 and the external heat exchanger 620 to detect the pressure of the cooling medium flowing out of the first in-vehicle heat exchanger 611. The temperature sensor 663 is connected between the second channel 652 and the liquid inlet 421 of the compressor 630 to detect the temperature of the cooling medium flowing back from the second channel 652 to the compressor 630.

[0160] In addition, the heat pump cooling circuit 600 may also be provided with a fourth control valve 670 and a fifth control valve 671, wherein the fourth control valve 670 is connected between the other end of the first channel 651 and the second in-vehicle heat exchanger 612 to adjust the flow of the cooling medium flowing to the second in-vehicle heat exchanger 612, and the fifth control valve 671 is connected between the external heat exchanger 620 and the second in-vehicle heat exchanger 612. The fifth control valve 671 may be an expansion valve or a throttle valve.

[0161] In addition, if Fig. 9As shown, the heat pump cooling circuit 600 is further provided with a first on-off valve 680 , a second on-off valve 681 , a third on-off valve 682 , a fourth on-off valve 683 and a one-way valve 690 .

[0162] Among them, one end of the one-way valve 690 can be connected to the other end of the outdoor heat exchanger 620, and the first in-vehicle condenser is connected between the other end of the one-way valve 690 and one end of the first channel 651, so that the one-way valve 690 can only allow the cooling medium of the outdoor heat exchanger 620 to flow to the first channel 651, and can prevent the cooling medium of the first in-vehicle heat exchanger 611 from flowing to the first channel 651 to flow to the outdoor heat exchanger 620, thereby avoiding interference with the flow of cooling medium.

[0163] Specifically, the first on-off valve 680 can be disposed between the other end of the first channel 651 and one end of the second in-vehicle heat exchanger 612 to control the cooling medium to flow to the second in-vehicle heat exchanger 612 or prevent the cooling medium from flowing to the second in-vehicle heat exchanger 612, the second on-off valve 681 can be disposed between the first in-vehicle heat exchanger 611 and one end of the first channel 651, the third on-off valve 682 can be disposed between the first in-vehicle heat exchanger 611 and the outside heat exchanger 620, one end of the fourth on-off valve 683 can be connected between the first in-vehicle heat exchanger 611 and the outside heat exchanger 620, and the other end of the fourth on-off valve 683 can be connected to the second channel 6 52 and the liquid inlet 421 of the compressor 630. In this way, the mode switching of the heat pump cooling circuit 600 can be achieved by controlling the on-off of the first on-off valve 680, the second on-off valve 681, the third on-off valve 682, and the fourth on-off valve 683. For example, the heat pump cooling circuit 600 utilizes the second heat exchanger 700 to absorb the heat of the battery pack cooling circuit 400 to heat the interior of the vehicle, or the heat pump cooling circuit 600 utilizes the external heat exchanger 620 to absorb the heat outside the vehicle to heat the interior of the vehicle, or the heat pump cooling circuit 600 utilizes the external heat exchanger 620 to release heat to the outside, and absorbs the heat inside the vehicle through the second in-vehicle heat exchanger 612 to cool the interior of the vehicle, etc.

[0164] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes a thermal management system 1 according to the above-described embodiment of the present invention.

[0165] According to the vehicle of the embodiment of the present invention, by utilizing the thermal management system 1 according to the above-mentioned embodiment of the present invention, it is possible to adjust the temperature of the battery pack cooling circuit 400 and the temperature of the heating cooling circuit 200, and to realize heating, heat release and heat storage of the battery pack 410, while maximizing the heat storage of the battery pack 410 and maintaining the battery pack 410 in an efficient operating temperature range, and meet the air conditioning and heating requirements, and balance the heat demand and heating demand of the battery pack 410.

[0166] The control method of the thermal management system 1 according to the embodiment of the present invention, other components and operations of the thermal management system 1 and the vehicle are well known to those skilled in the art and will not be described in detail here.

[0167] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0168] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A control method for a thermal management system, characterized in that: include: Heat exchange between the battery pack cooling circuit and the heating cooling circuit; Obtain air conditioning and heating demand parameters and / or battery pack temperature parameters; The cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange is adjusted according to the air conditioning heating demand parameter and / or the battery pack temperature parameter to adjust the heat exchange amount of the battery pack cooling circuit and the heating cooling circuit.

2. The control method of the thermal management system according to claim 1, characterized in that: Also includes: The engine cooling circuit is connected to the heating cooling circuit.

3. The control method of the thermal management system according to claim 1, characterized in that: The step of adjusting the cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange according to the air conditioning heating demand parameter and / or the battery pack temperature parameter includes: If the battery pack temperature parameter meets the upper limit condition of the battery pack heat storage, the cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange is reduced.

4. The control method of the thermal management system according to claim 3, characterized in that: If the battery pack temperature parameter meets the upper limit condition of the battery pack heat storage, it includes: The battery pack temperature is greater than a first preset temperature value; and / or The temperature of the cooling medium at the battery pack inlet is greater than a second preset temperature value.

5. The control method of the thermal management system according to claim 3, characterized in that: The method of adjusting the cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange according to the air conditioning heating demand parameter and / or the battery pack temperature parameter also includes: If the battery pack temperature parameter does not meet the battery pack heat storage upper limit condition, determining whether the air conditioning heating demand parameter meets the heating shortage condition; If so, the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit is reduced.

6. The control method of the thermal management system according to claim 5, characterized in that: The determining whether the air conditioning and heating demand parameters meet the heating shortage condition includes: Determine whether the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is not less than a first preset difference; If yes, then the air conditioning and heating demand parameters meet the heating shortage condition; If not, the air-conditioning and heating demand parameters do not meet the insufficient heating condition.

7. The control method of the thermal management system according to claim 5, characterized in that: The method of adjusting the cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange according to the air conditioning heating demand parameter and / or the battery pack temperature parameter also includes: If the air conditioning and heating demand parameter does not satisfy the insufficient heating condition, determining whether the air conditioning and heating demand parameter satisfies the surplus heating condition; If yes, increase the cooling medium flow rate of the battery pack cooling circuit and the heating cooling circuit for heat exchange; If not, the cooling medium flow rate for heat exchange between the battery pack cooling circuit and the heating cooling circuit is kept unchanged.

8. The control method of the thermal management system according to claim 7, characterized in that: The determining whether the air conditioning and heating demand parameters meet the heating surplus condition includes: Determining whether the difference between the target air outlet temperature of the air conditioner and the actual air outlet temperature of the air conditioner is not greater than a second preset difference; If yes, then the air conditioning and heating demand parameters meet the heating surplus condition; If not, the air-conditioning and heating demand parameters do not meet the heating surplus condition.

9. The control method of a thermal management system according to claim 6 or 8, characterized in that: The target air outlet temperature of the air conditioner is calculated based on the ambient temperature outside the vehicle, the ambient temperature inside the vehicle and the set temperature of the air conditioner.

10. The control method of a thermal management system according to any one of claims 1 to 8, characterized in that: When receiving a battery heating signal, the battery water pump of the battery pack cooling circuit operates at a first preset speed; When no battery heating signal is received and a battery heat storage signal is received, the battery water pump of the battery pack cooling circuit operates at a second preset speed; When no battery heating signal is received and a battery heat release signal is received, the battery water pump of the battery pack cooling circuit operates at a third preset speed; Wherein, the first preset speed and the third preset speed are both greater than the second preset speed.

11. A thermal management system, characterized in that: include: a heating and cooling circuit, the heating and cooling circuit being adapted to exchange heat with the passenger compartment; A first heat exchanger, wherein the first heat exchanger has a first heat exchange channel and a second heat exchange channel for exchanging heat with each other, and the first heat exchange channel is connected to the heating and cooling circuit; A battery pack cooling circuit, wherein the second heat exchange channel is connected to the battery pack cooling circuit, and the battery pack cooling circuit includes a first control valve; A controller is connected to the first control valve, and the controller adjusts the opening of the first control valve according to air conditioning heating demand parameters and / or battery pack temperature parameters to adjust the heat exchange amount of the battery pack cooling circuit and the heating cooling circuit.

12. The thermal management system according to claim 11, characterized in that: The battery pack cooling circuit also includes: A battery pack and a water temperature sensor, wherein the first control valve has a liquid inlet and a first liquid outlet, the liquid inlet, the first liquid outlet, the second heat exchange channel and the battery pack are connected in series, and the water temperature sensor is disposed in the battery pack and connected to the controller, and is used to detect the temperature of the cooling medium at the battery pack inlet; A battery pack temperature sensor, the battery pack temperature sensor is connected to the controller and is disposed on the battery pack to detect the temperature of the battery pack; Wherein, the controller adjusts the opening between the liquid inlet and the first liquid outlet of the first control valve according to the air conditioning and heating demand parameter and / or the battery pack temperature parameter.

13. The thermal management system according to claim 12, characterized in that: The battery pack cooling circuit also includes: A battery water pump, the battery water pump is connected in series with the battery pack and connected to the controller; Wherein, when the controller receives the battery heating signal, the battery water pump operates at a first preset speed; When the controller does not receive a battery heating signal but receives a battery heat storage signal, the battery water pump operates at a second preset speed; When the controller does not receive a battery heating signal but receives a battery heat release signal, the battery water pump operates at a third preset speed, and both the first preset speed and the third preset speed are greater than the second preset speed.

14. The thermal management system according to claim 12, characterized in that: The first control valve further has a second liquid outlet, the second liquid outlet and the battery pack are connected via a cooling medium branch, and the cooling medium branch and the second heat exchange channel are connected in parallel, and the first control valve has a first state, a second state and a third state; Wherein, when the first control valve is in the first state, the liquid inlet is connected to the first liquid outlet, and the liquid inlet is disconnected from the second liquid outlet; When the first control valve is in the second state, the liquid inlet is connected to the second liquid outlet, and the liquid inlet is disconnected from the first liquid outlet; When the first control valve is in the third state, the liquid inlet is communicated with the first liquid outlet and the second liquid outlet respectively.

15. The thermal management system according to claim 11, characterized in that: Also includes: An engine cooling circuit is selectively connectable to the heating cooling circuit.

16. The thermal management system according to claim 15, characterized in that: Also includes: A second control valve, wherein the second control valve is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface and the second interface are connected to the engine cooling circuit, the third interface and the fourth interface are connected to the heating cooling circuit, and the second control valve has a switchable third state and a fourth state; Wherein, when the second control valve is in the third state, the first interface is connected to the second interface, the third interface is connected to the fourth interface, and the engine cooling circuit is disconnected from the heating cooling circuit; When the second control valve is in the fourth state, the first interface is connected to the fourth interface, the second interface is connected to the third interface, and the engine cooling circuit is connected to the heating cooling circuit.

17. The thermal management system according to claim 16, characterized in that: The heating and cooling circuit comprises: A warm air core, wherein the warm air core, the first heat exchange channel, the third interface and the fourth interface are connected in series, and the warm air core is used for heat exchange with the passenger compartment; An air outlet temperature sensor is connected to the controller and is used to detect the air outlet temperature of the heater core.

18. The thermal management system according to claim 17, characterized in that: The heating and cooling circuit also includes: An electric heater is connected in series with the warm air core and is used to heat the cooling medium in the heating and cooling circuit.

19. The thermal management system according to claim 16, characterized in that: The engine cooling circuit comprises: an engine, the engine being in communication with the first interface; A thermostat, the thermostat being provided with an inlet, a first outlet and a second outlet, the inlet being connected to the engine, and the first outlet being communicated with the second interface; a radiator, the radiator being in communication with the engine and the second outlet, respectively; The thermostat adjusts the flow rate of the cooling medium between the engine and the radiator.

20. The thermal management system according to claim 11, characterized in that: Also includes: A heat pump cooling circuit, the heat pump cooling circuit comprising a compressor, an in-vehicle heat exchanger and an out-vehicle heat exchanger; A second heat exchanger, wherein the second heat exchanger has a third heat exchange channel and a fourth heat exchange channel for exchanging heat with each other, the third heat exchange channel is connected to the battery pack cooling circuit, the fourth heat exchange channel is connected to the heat pump cooling circuit, and the heat pump cooling circuit and the battery pack cooling circuit exchange heat through the second heat exchanger.

21. The thermal management system according to claim 20, characterized in that: The heat pump cooling circuit also includes: A liquid storage tank, wherein the in-vehicle heat exchanger is connected between the liquid outlet of the compressor and one end of the liquid storage tank; A regenerator, the regenerator having a first channel and a second channel for mutual heat exchange, one end of the first channel is connected to the other end of the liquid storage tank, and the other end of the first channel is connected to one end of the fourth heat exchange channel, one end of the second channel is connected to the other end of the fourth heat exchange channel, and the other end of the second channel is connected to the liquid inlet of the compressor.

22. The thermal management system according to claim 21, characterized in that: The heat pump cooling circuit also includes: a third control valve, the third control valve being connected between the other end of the first channel and the one end of the fourth heat exchange channel, and being used to control the flow rate of the cooling medium flowing from the first channel to the fourth heat exchange channel; A pressure and temperature sensor is connected between the other end of the fourth heat exchange channel and the one end of the second channel, and is used to detect the pressure and temperature of the cooling medium flowing out of the fourth heat exchange channel.

23. A vehicle, characterized in that: Comprising a thermal management system according to any one of claims 11-22.

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