Thermal management system, new energy vehicle and thermal management method

Abstract

The present invention provides a thermal management system and a thermal management method for warming up and / or cooling a battery and an electric drive. The thermal management system includes: a first valve core, a second valve core, a battery, a battery water pump, a battery cooler, an electric drive, an electric drive water pump, a power management module and a radiator; the thermal management method includes: obtaining current requirements of the battery and the electric drive; based on the current requirements, controlling the rotation angle of the multi-way valve, and then determining the thermal management mode.

Description

Technical Field

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

[0002] With the popularization of new energy vehicle models, the importance and complexity of thermal management systems in new energy vehicles have gradually increased, especially the complexity of water channels has increased significantly. The miniaturization and integration of thermal management systems has become a trend in the industry.

[0003] In the prior art, please refer to CN202121104136. The cooling and heating of the thermal management system are both realized by the first valve core in the multi-way valve. The second valve core in the multi-way valve is only used for waste heat recovery of the electric drive. If all modes are to be realized, it is necessary to set a pipeline on the circumferential surface of the valve core housing, and then cooperate with the pipeline on the top cover plate to realize the switching of all modes. However, setting a pipeline on the circumferential surface of the valve core housing will increase the volume of the valve core, which is not conducive to integration.

[0004] In addition, the rotation of the second valve core in the prior art is controlled by the block on the first valve core, so the second valve core can only rotate within the range of the block, resulting in the mode switching control requiring the second valve core to rotate back and forth, and unable to achieve control continuity and independence, thereby increasing the control difficulty. Summary of the invention

[0005] The present invention provides a thermal management system, a new energy vehicle and a thermal management method to solve the problems of increased volume of a valve core and increased control difficulty.

[0006] According to a first aspect of the present invention, a thermal management system is provided, comprising: a multi-way valve, a battery, a battery water pump, a battery cooler, an electric drive, an electric drive water pump, a power management module and a radiator; the multi-way valve comprises a first valve core and a second valve core;

[0007] The first end of the battery is connected to the first end of the battery water pump, the second end of the battery water pump is connected to the first end of the first valve core, the second end of the first valve core is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the first end of the second valve core, and the second end of the second valve core is connected to the second end of the battery to form a battery thermal management loop;

[0008] The first end of the electric drive is connected to the third end of the first valve core, the fourth end of the first valve core is connected to the first end of the electric water pump, the second end of the electric water pump is connected to the first end of the power management module, the second end of the power management module is connected to the second end of the electric drive, the first end of the radiator is connected to the fifth end of the first valve core, and the second end of the radiator is connected to the sixth end of the first valve core to form an electric drive thermal management loop.

[0009] Optionally, the first valve core includes a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, and a first cavity, a second cavity, a third cavity, and a fourth cavity; and the second valve core includes a sixth pipeline, a seventh pipeline, an eighth pipeline, and a fifth cavity and a sixth cavity.

[0010] Optionally, the thermal management system includes a first thermal management mode, and when the thermal management system is in the first thermal management mode: the first end of the first valve core is connected to its second end, and the first end of the second valve core is connected to its second end, so that the battery thermal management circuit cools the battery; the third end of the first valve core is connected to its fourth end, so that the electric drive thermal management circuit warms up the electric drive.

[0011] Optionally, the thermal management system includes a second thermal management mode, and when the thermal management system is in the second thermal management mode: the first end of the first valve core is connected to its second end, and the first end of the second valve core is connected to its second end, so that the battery thermal management circuit cools the battery; the third end of the first valve core is connected to its fifth end, and the fourth end of the first valve core is connected to its sixth end, so as to connect the radiator in series to the electric drive thermal management circuit, so that the electric drive thermal management circuit cools the electric drive.

[0012] Optionally, the thermal management system includes a third thermal management mode, and when the thermal management system is in the third thermal management mode: the first end of the first valve core is connected to its third end, and the second end of the first valve core is connected to its fourth end, and the first end of the second valve core is connected to its second end, so as to connect the battery thermal management circuit and the electric drive thermal management circuit in series to utilize the waste heat of the electric drive to heat the battery.

[0013] Optionally, the thermal management system includes a fourth thermal management mode, and when the thermal management system is in the fourth thermal management mode: the second end of the first valve core is connected to its fourth end, and the first end of the second valve core is connected to its third end, so as to connect the battery cooler in series to the electric drive thermal management circuit, so as to utilize the battery cooler to recover waste heat from the electric drive.

[0014] Optionally, when the thermal management system is in the first thermal management mode, the specific connection of the thermal management system is:

[0015] The second end of the battery water pump is connected to the third pipeline of the first valve core, the third pipeline is connected to the first pipeline through the first cavity, the first pipeline is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the eighth pipeline, the eighth pipeline is connected to the seventh pipeline through the fifth cavity, and the seventh pipeline is connected to the battery, so that the battery thermal management circuit cools the battery;

[0016] The first end of the electric drive is connected to the sixth pipeline, the sixth pipeline is connected to the second pipeline through the third cavity, and the second pipeline is connected to the electric drive water pump, so that the electric drive thermal management circuit can warm up the electric drive.

[0017] Optionally, when the thermal management system is in the second thermal management mode, the specific connection of the thermal management system is:

[0018] The second end of the battery water pump is connected to the third pipeline of the first valve core, the third pipeline is connected to the first pipeline through the second cavity, the first pipeline is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the eighth pipeline, the eighth pipeline is connected to the seventh pipeline through the fifth cavity, and the seventh pipeline is connected to the battery, so that the battery thermal management circuit cools the battery;

[0019] The first end of the electric drive is connected to the sixth pipeline, the sixth pipeline is connected to the fifth pipeline through the fourth cavity, the fifth pipeline is connected to the first end of the radiator, the second end of the radiator is connected to the fourth pipeline, the fourth pipeline is connected to the second pipeline through the first cavity, and the second pipeline is connected to the electric drive water pump to realize the electric drive thermal management circuit to cool the electric drive.

[0020] Optionally, when the thermal management system is in the third thermal management mode, the specific connection of the thermal management system is:

[0021] The second end of the battery water pump is connected to the third pipeline of the first valve core, the third pipeline is connected to the sixth pipeline through the third cavity, the sixth pipeline is connected to the electric drive, the electric drive is connected to the second pipeline through the electric drive thermal management circuit, the second pipeline is connected to the first pipeline through the second cavity, the first pipeline is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the eighth pipeline, the eighth pipeline is connected to the seventh pipeline through the fifth cavity, and the seventh pipeline is connected to the battery, so that the waste heat of the electric drive heats the battery.

[0022] Optionally, when the thermal management system is in the fourth thermal management mode, the specific connection of the thermal management system is:

[0023] The first end of the battery cooler is connected to the first pipeline, the first pipeline is connected to the second pipeline through the second cavity, the second pipeline is connected to the sixth pipeline on the second valve core through the electric drive thermal management circuit, the sixth pipeline on the second valve core is connected to the eighth pipeline through the sixth cavity, and the eighth pipeline is connected to the second end of the battery cooler to enable the battery cooler to recover waste heat from the electric drive.

[0024] Optionally, the thermal management system also includes: a first planetary gear, a first incomplete gear, a second planetary gear and a second incomplete gear; the first planetary gears are respectively engaged with the first incomplete gears to rotate the first valve core; the second planetary gears are respectively engaged with the second incomplete gears to rotate the second valve core.

[0025] According to a second aspect of the present invention, there is provided a new energy vehicle, comprising the first aspect and its optional thermal management system.

[0026] According to a third aspect of the present invention, a thermal management method is provided, which is applied to the thermal management system described in the second aspect and is used to warm up and / or cool down a battery and an electric drive. The method comprises:

[0027] Obtaining the current status and requirements of the battery and the electric drive;

[0028] Based on the current state and demand, the rotation angle of the multi-way valve is controlled to determine the thermal management mode.

[0029] Optionally, controlling the rotation angle of the multi-way valve based on the current state and demand, and then determining the thermal management mode includes:

[0030] When the battery demand is a cooling demand and the electric drive demand is a warming demand: the first valve core and the second valve core of the multi-way valve are controlled to be in the first position, and the thermal management mode is determined to be the first thermal management mode; wherein, the first thermal management mode is characterized by the battery thermal management circuit cooling the battery and the electric drive thermal management circuit warming up the electric drive.

[0031] Optionally, controlling the rotation angle of the multi-way valve based on the current state and demand to thereby determine the thermal management mode further includes:

[0032] When the battery needs cooling and the electric drive needs cooling: control the first valve core and the second valve core of the multi-way valve to be in the second position, and determine that the thermal management mode is the second thermal management mode; wherein the second thermal management mode is characterized by the battery thermal management circuit cooling the battery and the electric drive thermal management circuit cooling the electric drive;

[0033] The second position is characterized by that the first valve core rotates 90 degrees based on the first position, and the second valve core remains unchanged.

[0034] Optionally, controlling the rotation angle of the multi-way valve based on the current state and demand to thereby determine the thermal management mode further includes:

[0035] When the battery demand is a heating demand and the electric drive demand is a heating demand: the first valve core and the second valve core of the multi-way valve are controlled to be in a third position, and the thermal management mode is determined to be the third thermal management mode; wherein, the third thermal management mode is characterized by the heat of the electric drive heating the battery.

[0036] The third position is characterized by that based on the second position, the first valve core rotates 45 degrees and the second valve core remains unchanged.

[0037] Optionally, the controlling the rotation angle of the multi-way valve based on the current demand to thereby determine the thermal management mode further includes:

[0038] When the battery has no demand and the electric drive requires waste heat recovery: controlling the first valve core and the second valve core of the multi-way valve to be in a fourth position, determining that the thermal management mode is a fourth thermal management mode; wherein the fourth thermal management mode is characterized by utilizing a battery cooler in the battery thermal management circuit to recover waste heat from the electric drive;

[0039] The fourth position is characterized by that based on the third position, the first valve core remains unchanged and the second valve core rotates 45 degrees.

[0040] Optionally, the thermal management system also includes a passenger compartment and a refrigerant circuit; when the passenger compartment requires heating, the battery cooler transfers the waste heat of the electric drive to the passenger compartment through the refrigerant circuit to meet the heating demand of the passenger compartment.

[0041] The thermal management system and thermal management method provided by the present invention realize all requirements of the thermal management system through the cooperation of the first valve core and the second valve core, and can realize the switching of all modes without setting pipelines on the circumferential surface of the valve core housing, thereby reducing the volume of the valve core and further improving the integration of the multi-way valve.

[0042] In a preferred embodiment, the present invention realizes mode switching by rotating the planetary gear, avoiding the use of a block that can only rotate within a fixed range, further realizing the continuity and independence of mode control, and reducing the difficulty of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0044] Figure 1 The structure of the thermal management system in one embodiment of the present invention is shown in FIG. Figure 1 ;

[0045] Figure 2 The structure of the thermal management system in one embodiment of the present invention is shown in FIG. Figure 2 ;

[0046] Figure 3 The structure of the thermal management system in one embodiment of the present invention is shown in FIG. Figure 3 ;

[0047] Figure 4 The structure of the thermal management system in one embodiment of the present invention is shown in FIG. Figure 4 ;

[0048] Figure 5 The valve core of the multi-way valve in the thermal management system described in one embodiment of the present invention is schematically shown. Figure 1 ;

[0049] Figure 6 The valve core of the multi-way valve in the thermal management system described in one embodiment of the present invention is schematically shown. Figure 2 ;

[0050] Figure 7 The valve core of the multi-way valve in the thermal management system described in one embodiment of the present invention is schematically shown. Figure 3 ;

[0051] Figure 8 The valve core of the multi-way valve in the thermal management system described in one embodiment of the present invention is schematically shown. Figure 4 .

[0052] Description of reference numerals:

[0053] 1- first valve core;

[0054] 101-first pipeline;

[0055] 102- second pipeline;

[0056] 103- third pipeline;

[0057] 104- fourth pipeline;

[0058] 105-fifth pipeline;

[0059] 106-sixth pipeline;

[0060] 107-first cavity;

[0061] 108 - second cavity;

[0062] 109 - third cavity;

[0063] 110 - fourth cavity;

[0064] 2- second valve core;

[0065] 201-the seventh pipeline;

[0066] 202-eighth pipeline;

[0067] 203-fifth cavity;

[0068] 204-sixth cavity;

[0069] 3-Battery;

[0070] 4-Battery water pump;

[0071] 5-Battery cooler;

[0072] 6-Electric drive;

[0073] 7-Electric water pump;

[0074] 8- Power management module;

[0075] 9- Radiator;

[0076] 10- first incomplete gear;

[0077] 11- first planetary gear;

[0078] 12- second incomplete gear;

[0079] 13-Second planetary gear. DETAILED DESCRIPTION

[0080] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0081] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0082] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0083] Please refer to Figure 1 The present invention provides a thermal management system, including: a multi-way valve, a battery 3, a battery water pump 4, a battery cooler 5, an electric drive 6, an electric drive water pump 7, a power management module and a radiator 9; the multi-way valve includes a first valve core 1 and a second valve core 2;

[0084] The first end of the battery 3 is connected to the first end of the battery water pump 4, the second end of the battery water pump 4 is connected to the first end of the first valve core 1, the second end of the first valve core 1 is connected to the first end of the battery cooler 5, the second end of the battery cooler 5 is connected to the first end of the second valve core 2, and the second end of the second valve core 2 is connected to the second end of the battery 3 to form a battery thermal management loop;

[0085] The first end of the electric drive 6 is connected to the third end of the first valve core 1, the fourth end of the first valve core 1 is connected to the first end of the electric drive water pump 7, the second end of the electric drive water pump 7 is connected to the first end of the power management module, the second end of the power management module is connected to the second end of the electric drive 6, the first end of the radiator 9 is connected to the fifth end of the first valve core 1, and the second end of the radiator 9 is connected to the sixth end of the first valve core 1 to form an electric drive thermal management loop.

[0086] In a specific embodiment, the first valve core 1 includes a first pipeline 101, a second pipeline 102, a third pipeline 103, a fourth pipeline 104, a fifth pipeline 105, a sixth pipeline 106 and a first cavity 107, a second cavity 108, a third cavity 109, and a fourth cavity 110, and the second valve core 2 includes a sixth pipeline 106, a seventh pipeline 201, an eighth pipeline 202 and a fifth cavity 203, and a sixth cavity 204.

[0087] In a preferred embodiment, the connection methods in the above schemes are all connected through pipelines, and the pipelines include coolant, which is characterized as a liquid that can warm up and / or cool the battery 3 and the electric drive 6.

[0088] In the above scheme, all requirements of the thermal management system are realized through the cooperation of the first valve core 1 and the second valve core 2, and all modes can be switched without setting pipelines on the circumferential surface of the valve core housing, thereby reducing the volume of the valve core and further improving the integration of the multi-way valve.

[0089] Regarding the first thermal management mode, in a preferred embodiment, please continue to refer to Figure 1 The thermal management system includes a first thermal management mode, and when the thermal management system is in the first thermal management mode: the first end of the first valve core 1 is connected to the second end thereof, and the first end of the second valve core 2 is connected to the second end thereof, so that the thermal management circuit of the battery 3 cools the battery 3; the third end of the first valve core 1 is connected to the fourth end thereof, so that the thermal management circuit of the electric drive 6 warms up the electric drive 6.

[0090] For specific embodiments, please refer to Figure 1 as well as Figure 5 , when the thermal management system is in the first thermal management mode, the specific connection of the thermal management system is:

[0091] The second end of the battery water pump 4 is connected to the third pipeline 103 of the first valve core 1, the third pipeline 103 is connected to the first pipeline 101 through the first cavity 107, the first pipeline 101 is connected to the first end of the battery cooler 5, the second end of the battery cooler 5 is connected to the eighth pipeline 202, the eighth pipeline 202 is connected to the seventh pipeline 201 through the fifth cavity 203, and the seventh pipeline 201 is connected to the battery 3, so that the thermal management circuit of the battery 3 cools the battery 3;

[0092] The first end of the electric drive 6 is connected to the sixth pipeline 106 , the sixth pipeline 106 is connected to the second pipeline 102 through the third cavity 109 , and the second pipeline 102 is connected to the electric drive water pump 7 , so that the thermal management circuit of the electric drive 6 can warm up the electric drive 6 .

[0093] Regarding the second thermal management mode, in a preferred embodiment, please continue to refer to Figure 2 , the thermal management system includes a second thermal management mode, and when the thermal management system is in the second thermal management mode: the first end of the first valve core 1 is connected to the second end thereof, and the first end of the second valve core 2 is connected to the second end thereof, so that the thermal management circuit of the battery 3 cools the battery 3; the third end of the first valve core 1 is connected to the fifth end thereof, and the fourth end of the first valve core 1 is connected to the sixth end thereof, so that the radiator 9 is connected in series to the thermal management circuit of the electric drive 6, so that the thermal management circuit of the electric drive 6 cools the electric drive 6.

[0094] For specific embodiments, please refer to Figure 2 as well as Figure 6 , when the thermal management system is in the second thermal management mode, the specific connection of the thermal management system is:

[0095] The second end of the battery water pump 4 is connected to the third pipeline 103 of the first valve core 1, the third pipeline 103 is connected to the first pipeline 101 through the second cavity 108, the first pipeline 101 is connected to the first end of the battery cooler 5, the second end of the battery cooler 5 is connected to the eighth pipeline 202, the eighth pipeline 202 is connected to the seventh pipeline 201 through the fifth cavity 203, and the seventh pipeline 201 is connected to the battery 3, so that the thermal management circuit of the battery 3 cools the battery 3;

[0096] The first end of the electric drive 6 is connected to the sixth pipeline 106, the sixth pipeline 106 is connected to the fifth pipeline 105 through the fourth cavity 110, the fifth pipeline 105 is connected to the first end of the radiator 9, the second end of the radiator 9 is connected to the fourth pipeline 104, the fourth pipeline 104 is connected to the second pipeline 102 through the first cavity 107, and the second pipeline 102 is connected to the electric drive water pump 7 to realize the thermal management circuit of the electric drive 6 to cool the electric drive 6.

[0097] Regarding the third thermal management mode, in a preferred embodiment, please continue to refer to Figure 3 , the thermal management system includes a third thermal management mode, and when the thermal management system is in the third thermal management mode: the first end of the first valve core 1 is connected to its third end, and the second end of the first valve core 1 is connected to its fourth end, and the first end of the second valve core 2 is connected to its second end, so as to connect the thermal management circuit of the battery 3 and the thermal management circuit of the electric drive 6 in series, so as to utilize the waste heat of the electric drive 6 to heat the battery 3.

[0098] For specific embodiments, please refer to Figure 3 as well as Figure 7 , when the thermal management system is in the third thermal management mode, the specific connections of the thermal management system are:

[0099] The second end of the battery water pump 4 is connected to the third pipeline 103 of the first valve core 1, the third pipeline 103 is connected to the sixth pipeline 106 through the third cavity 109, the sixth pipeline 106 is connected to the electric drive 6, the electric drive 6 is connected to the second pipeline 102 through the thermal management circuit of the electric drive 6, the second pipeline 102 is connected to the first pipeline 101 through the second cavity 108, the first pipeline 101 is connected to the first end of the battery cooler 5, the second end of the battery cooler 5 is connected to the eighth pipeline 202, the eighth pipeline 202 is connected to the seventh pipeline 201 through the fifth cavity 203, and the seventh pipeline 201 is connected to the battery 3, so that the waste heat of the electric drive 6 heats the battery 3.

[0100] Regarding the fourth thermal management mode, in a preferred embodiment, please continue to refer to Figure 4 , the thermal management system includes a fourth thermal management mode, and when the thermal management system is in the fourth thermal management mode: the second end of the first valve core 1 is connected to its fourth end, and the first end of the second valve core 2 is connected to its third end, so as to connect the battery cooler 5 in series to the thermal management circuit of the electric drive 6, so as to utilize the battery cooler 5 to recover waste heat from the electric drive 6.

[0101] For specific embodiments, please refer to Figure 4 as well as Figure 8 , when the thermal management system is in the fourth thermal management mode, the specific connections of the thermal management system are:

[0102] The first end of the battery cooler 5 is connected to the first pipeline 101, the first pipeline 101 is connected to the second pipeline 102 through the second cavity 108, the second pipeline 102 is connected to the sixth pipeline 106 on the second valve core 2 through the thermal management circuit of the electric drive 6, the sixth pipeline 106 on the second valve core 2 is connected to the eighth pipeline 202 through the sixth cavity 204, and the eighth pipeline 202 is connected to the second end of the battery cooler 5 to enable the battery cooler 5 to recover waste heat from the electric drive 6.

[0103] In the above scheme, the present invention connects the electric drive thermal management circuit and the battery thermal management circuit in series or in parallel through the connection of different pipelines of the valve core and the devices in the thermal management system, so that the thermal management system can switch to different thermal management modes to meet different thermal management requirements.

[0104] In a preferred embodiment, please refer to Figure 6-Figure 8 The thermal management system also includes: a first planetary gear 11, a first incomplete gear 10, a second planetary gear 13 and a second incomplete gear 12; the first planetary gear 11 is respectively engaged with the first incomplete gear 10 to rotate the first valve core 1; the second planetary gear 13 is respectively engaged with the second incomplete gear 12 to rotate the second valve core 2.

[0105] In the above scheme, the present invention realizes the switching of modes by the rotation of the planetary gear, avoiding the use of a block that can only rotate within a fixed range, further realizing the continuity and independence of mode control, and reducing the control difficulty.

[0106] The present invention also provides a new energy vehicle, comprising the thermal management system described above.

[0107] The present invention further provides a thermal management method, which is applied to the thermal management system described above and is used to warm up and / or cool down a battery and an electric drive. The method comprises:

[0108] Obtaining the current status and requirements of the battery and the electric drive;

[0109] Based on the current state and demand, the rotation angle of the multi-way valve is controlled to determine the thermal management mode.

[0110] Regarding the current status and demand of the battery and the electric drive, in one example, the current demand includes: cooling demand, self-circulation demand, no demand, and waste heat recovery demand; wherein, the self-circulation demand is characterized by the need to reduce the temperature difference by circulating the coolant when the temperature difference between any two components in the battery or the electric drive is greater than a preset threshold; the no demand is characterized by the overall temperature of the battery or the electric drive being within a preset range and no cooling or heating is required; the waste heat recovery demand is characterized by the use of a battery chiller to absorb the heat of the electric drive when the overall temperature of the battery is within a preset range and the temperature of the electric drive exceeds the preset range.

[0111] In a preferred embodiment, please refer to Figure 5 , based on the current state and demand, controlling the rotation angle of the multi-way valve to further determine the thermal management mode includes:

[0112] When the battery demand is a cooling demand and the electric drive demand is a warming demand: the first valve core and the second valve core of the multi-way valve are controlled to be in the first position, and the thermal management mode is determined to be the first thermal management mode; wherein, the first thermal management mode is characterized by the battery thermal management circuit cooling the battery and the electric drive thermal management circuit warming up the electric drive.

[0113] For another preferred embodiment, please refer to Figure 6 , based on the current state and demand, controlling the rotation angle of the multi-way valve to determine the thermal management mode also includes:

[0114] When the battery needs cooling and the electric drive needs cooling: control the first valve core and the second valve core of the multi-way valve to be in the second position, and determine that the thermal management mode is the second thermal management mode; wherein the second thermal management mode is characterized by the battery thermal management circuit cooling the battery and the electric drive thermal management circuit cooling the electric drive;

[0115] The second position is characterized by that the first valve core rotates 90 degrees based on the first position, and the second valve core remains unchanged.

[0116] In a specific embodiment, whether to enter the second thermal management mode or the first thermal management mode is determined based on the coolant temperature of the electric drive thermal management loop; specifically, when the coolant temperature is greater than a preset temperature (for example, 58°C), the second thermal management mode is entered, and when the coolant temperature is less than a preset temperature (for example, 55°C), the first thermal management mode is entered.

[0117] For other preferred embodiments, please refer to Figure 7 , based on the current state and demand, controlling the rotation angle of the multi-way valve to determine the thermal management mode also includes:

[0118] When the battery demand is a heating demand and the electric drive demand is a heating demand: the first valve core and the second valve core of the multi-way valve are controlled to be in a third position, and the thermal management mode is determined to be the third thermal management mode; wherein, the third thermal management mode is characterized by the heat of the electric drive heating the battery.

[0119] The third position is characterized by that based on the second position, the first valve core rotates 45 degrees and the second valve core remains unchanged.

[0120] In a specific embodiment, when the temperature of the battery is lower than a preset temperature (eg, 5° C.), the third thermal management mode is entered, and the heat from driving the electric drive can be used to heat the battery.

[0121] For other preferred embodiments, please refer to Figure 8 , based on the current state and demand, controlling the rotation angle of the multi-way valve to determine the thermal management mode also includes:

[0122] When the battery has no demand and the electric drive requires waste heat recovery: controlling the first valve core and the second valve core of the multi-way valve to be in a fourth position, determining that the thermal management mode is a fourth thermal management mode; wherein the fourth thermal management mode is characterized by utilizing a battery cooler in the battery thermal management circuit to recover waste heat from the electric drive;

[0123] The fourth position is characterized by that based on the third position, the first valve core remains unchanged and the second valve core rotates 45 degrees.

[0124] In one embodiment, the thermal management system also includes a passenger compartment and a refrigerant circuit; when the passenger compartment requires heating, the battery cooler transfers the waste heat of the electric drive to the passenger compartment through the refrigerant circuit to meet the heating demand of the passenger compartment.

[0125] In a specific embodiment, when the battery temperature is within a preset range (for example, the average battery temperature is between 5°C and 35°C), the electric drive temperature is greater than a preset temperature (for example, 50°C), and the passenger compartment has a heating demand for the refrigerant circuit, the fourth thermal management mode is entered; and in this mode, the excess heat on the coolant side can be exchanged into the refrigerant circuit through the battery chiller to utilize this part of the electric drive waste heat to meet the heating needs of the passenger compartment.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management system, characterized in that: include: A multi-way valve, a battery, a battery water pump, a battery cooler, an electric drive, an electric drive water pump, a power management module and a radiator; the multi-way valve comprises a first valve core and a second valve core; The first end of the battery is connected to the first end of the battery water pump, the second end of the battery water pump is connected to the first end of the first valve core, the second end of the first valve core is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the first end of the second valve core, and the second end of the second valve core is connected to the second end of the battery to form a battery thermal management loop; The first end of the electric drive is connected to the third end of the first valve core, the fourth end of the first valve core is connected to the first end of the electric drive water pump, the second end of the electric drive water pump is connected to the first end of the power management module, the second end of the power management module is connected to the second end of the electric drive, the first end of the radiator is connected to the fifth end of the first valve core, and the second end of the radiator is connected to the sixth end of the first valve core, so as to form an electric drive thermal management loop; The first valve core includes a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, and a first cavity, a second cavity, a third cavity, and a fourth cavity; the second valve core includes a sixth pipeline, a seventh pipeline, an eighth pipeline, and a fifth cavity and a sixth cavity; The thermal management system includes a third thermal management mode, and when the thermal management system is in the third thermal management mode: the first end of the first valve core is connected to its third end, and the second end of the first valve core is connected to its fourth end, and the first end of the second valve core is connected to its second end, so as to connect the battery thermal management circuit and the electric drive thermal management circuit in series, so as to utilize the waste heat of the electric drive to heat the battery.

2. The thermal management system according to claim 1, characterized in that: The thermal management system includes a first thermal management mode, and when the thermal management system is in the first thermal management mode: the first end of the first valve core is connected to its second end, and the first end of the second valve core is connected to its second end, so that the battery thermal management circuit cools the battery; the third end of the first valve core is connected to its fourth end, so that the electric drive thermal management circuit warms up the electric drive.

3. The thermal management system according to claim 1, characterized in that: The thermal management system includes a second thermal management mode, and when the thermal management system is in the second thermal management mode: the first end of the first valve core is connected to the second end thereof, and the first end of the second valve core is connected to the second end thereof, so that the battery thermal management circuit cools the battery; the third end of the first valve core is connected to the fifth end thereof, and the fourth end of the first valve core is connected to the sixth end thereof, so that the radiator is connected in series to the electric drive thermal management circuit, so that the electric drive thermal management circuit cools the electric drive.

4. The thermal management system according to claim 1, characterized in that: The thermal management system includes a fourth thermal management mode, and when the thermal management system is in the fourth thermal management mode: the second end of the first valve core is connected to its fourth end, and the first end of the second valve core is connected to its third end, so as to connect the battery cooler in series to the electric drive thermal management circuit, so as to utilize the battery cooler to recover waste heat from the electric drive.

5. The thermal management system according to claim 2, characterized in that: When the thermal management system is in the first thermal management mode, the specific connections of the thermal management system are: The second end of the battery water pump is connected to the third pipeline of the first valve core, the third pipeline is connected to the first pipeline through the first cavity, the first pipeline is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the eighth pipeline, the eighth pipeline is connected to the seventh pipeline through the fifth cavity, and the seventh pipeline is connected to the battery, so that the battery thermal management circuit cools the battery; The first end of the electric drive is connected to the sixth pipeline, the sixth pipeline is connected to the second pipeline through the third cavity, and the second pipeline is connected to the electric drive water pump, so that the electric drive thermal management circuit can warm up the electric drive.

6. The thermal management system according to claim 3, characterized in that: When the thermal management system is in the second thermal management mode, the specific connections of the thermal management system are: The second end of the battery water pump is connected to the third pipeline of the first valve core, the third pipeline is connected to the first pipeline through the second cavity, the first pipeline is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the eighth pipeline, the eighth pipeline is connected to the seventh pipeline through the fifth cavity, and the seventh pipeline is connected to the battery, so that the battery thermal management circuit cools the battery; The first end of the electric drive is connected to the sixth pipeline, the sixth pipeline is connected to the fifth pipeline through the fourth cavity, the fifth pipeline is connected to the first end of the radiator, the second end of the radiator is connected to the fourth pipeline, the fourth pipeline is connected to the second pipeline through the first cavity, and the second pipeline is connected to the electric drive water pump to realize the electric drive thermal management circuit to cool the electric drive.

7. The thermal management system according to claim 1, characterized in that: When the thermal management system is in the third thermal management mode, the specific connections of the thermal management system are: The second end of the battery water pump is connected to the third pipeline of the first valve core, the third pipeline is connected to the sixth pipeline through the third cavity, the sixth pipeline is connected to the electric drive, the electric drive is connected to the second pipeline through the electric drive thermal management circuit, the second pipeline is connected to the first pipeline through the second cavity, the first pipeline is connected to the first end of the battery cooler, the second end of the battery cooler is connected to the eighth pipeline, the eighth pipeline is connected to the seventh pipeline through the fifth cavity, and the seventh pipeline is connected to the battery, so that the waste heat of the electric drive heats the battery.

8. The thermal management system according to claim 4, characterized in that: When the thermal management system is in the fourth thermal management mode, the specific connections of the thermal management system are: The first end of the battery cooler is connected to the first pipeline, the first pipeline is connected to the second pipeline through the second cavity, the second pipeline is connected to the sixth pipeline on the second valve core through the electric drive thermal management circuit, the sixth pipeline on the second valve core is connected to the eighth pipeline through the sixth cavity, and the eighth pipeline is connected to the second end of the battery cooler to enable the battery cooler to recover waste heat from the electric drive.

9. The thermal management system according to any one of claims 1 to 8, characterized in that: The thermal management system also includes: a first planetary gear, a first incomplete gear, a second planetary gear and a second incomplete gear; the first planetary gears are respectively meshed with the first incomplete gears to rotate the first valve core; the second planetary gears are respectively meshed with the second incomplete gears to rotate the second valve core.

10. A new energy vehicle, characterized in that: A thermal management system comprising any one of claims 1-9.

11. A thermal management method, characterized in that: The thermal management system according to any one of claims 1 to 9 is used to warm up and / or cool down a battery and an electric drive, the method comprising: Obtaining the current status and requirements of the battery and the electric drive; Based on the current state and demand, the rotation angle of the multi-way valve is controlled to determine the thermal management mode.

12. The thermal management method according to claim 11, characterized in that: The controlling the rotation angle of the multi-way valve based on the current state and demand, and then determining the thermal management mode includes: When the battery demand is a cooling demand and the electric drive demand is a warming demand: the first valve core and the second valve core of the multi-way valve are controlled to be in the first position, and the thermal management mode is determined to be the first thermal management mode; wherein, the first thermal management mode is characterized by the battery thermal management circuit cooling the battery and the electric drive thermal management circuit warming up the electric drive.

13. The thermal management method according to claim 12, characterized in that: The step of controlling the rotation angle of the multi-way valve based on the current state and demand to thereby determine the thermal management mode further comprises: When the battery needs cooling and the electric drive needs cooling: control the first valve core and the second valve core of the multi-way valve to be in the second position, and determine that the thermal management mode is the second thermal management mode; wherein the second thermal management mode is characterized by the battery thermal management circuit cooling the battery and the electric drive thermal management circuit cooling the electric drive; The second position is characterized by that the first valve core rotates 90 degrees based on the first position, and the second valve core remains unchanged.

14. The thermal management method according to claim 13, characterized in that: The step of controlling the rotation angle of the multi-way valve based on the current state and demand to thereby determine the thermal management mode further comprises: When the demand of the battery is a heating demand and the demand of the electric drive is a heating demand: controlling the first valve core and the second valve core of the multi-way valve to be in a third position, determining the thermal management mode to be a third thermal management mode; wherein the third thermal management mode is characterized by the heat of the electric drive heating the battery; The third position is characterized by that based on the second position, the first valve core rotates 45 degrees and the second valve core remains unchanged.

15. The thermal management method according to claim 14, characterized in that: The step of controlling the rotation angle of the multi-way valve based on the current state and demand to thereby determine the thermal management mode further comprises: When the battery has no demand and the electric drive requires waste heat recovery: controlling the first valve core and the second valve core of the multi-way valve to be in a fourth position, determining that the thermal management mode is a fourth thermal management mode; wherein the fourth thermal management mode is characterized by utilizing a battery cooler in the battery thermal management circuit to recover waste heat from the electric drive; The fourth position is characterized by that based on the third position, the first valve core remains unchanged and the second valve core rotates 45 degrees.

16. The thermal management method according to claim 15, characterized in that: The thermal management system also includes a passenger compartment and a refrigerant circuit; when the passenger compartment needs heating, the battery cooler transfers the waste heat of the electric drive to the passenger compartment through the refrigerant circuit to meet the heating demand of the passenger compartment.

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