Thermal management system and vehicle

Abstract

The present application provides a thermal management system and a vehicle. The thermal management system is provided with a battery that exchanges heat with a thermal medium of an F4 flow path, a drive axle that exchanges heat with a thermal medium of an F2 flow path, and a switching device. The switching device forms a thermal circuit that connects the F4 flow path and the F2 flow path after the temperature of the thermal medium of the F4 flow path is detected by a flow path sensor and the detected value of the flow path sensor is lower than a threshold value Tb. The switching device forms a thermal circuit that includes the F4 flow path and is isolated from the F2 flow path after the temperature of the thermal medium of the F4 flow path is detected by the flow path sensor and the detected value of the flow path sensor is higher than or equal to the threshold value Tb and lower than a threshold value Tc.

Description

Technical Field

[0001] This disclosure relates to thermal management systems and vehicles. Background Technology

[0002] International Patent Publication No. 2024 / 105802 discloses a motor control system for an electric vehicle equipped with a battery and a motor. In this motor control system, the battery is preheated using cooling water heated by the heat generated by the motor.

[0003] In the aforementioned International Publication No. 2024 / 105802, as described above, control is performed to raise the battery temperature (preheat). When the battery is preheated, the temperatures of the multiple battery cells within the battery may differ. To eliminate these temperature differences, heat exchange between the battery and a heat transfer medium such as cooling water is considered. It is desirable to prevent the battery temperature from excessively rising (falling) due to heat exchange between the battery and the heat transfer medium. Summary of the Invention

[0004] This disclosure provides a thermal management system and a vehicle capable of suppressing temperature differences among multiple battery cells and suppressing excessive temperature rise (fall) of the battery storage device.

[0005] The thermal management system disclosed in the first aspect of this invention includes:

[0006] The first flow path, the second flow path, and the third flow path constitute the circulation of the heating medium;

[0007] An energy storage device comprising multiple energy storage cells and configured to exchange heat with the heat medium of the first flow path;

[0008] A drive unit configured to exchange heat with the heat medium of the second flow path and generate driving force;

[0009] A heat exchanger, which is located in the third flow path;

[0010] A switching device, configured to switch the connection state between a first flow path, a second flow path, and a third flow path; and

[0011] A medium temperature detection device is used to detect the temperature of the hot medium flowing in the first flow path.

[0012] The loop that includes the first flow path and the second flow path that are interconnected and is isolated from the third flow path is defined as the first flow path loop.

[0013] The loop containing the first flow path that is isolated from the second flow path is designated as the second flow path loop.

[0014] When the control that causes the energy storage device to heat up is set to heat-up control...

[0015] The switching device is configured as follows:

[0016] After temperature control, if the detected value of the medium temperature detection device is lower than the first threshold, the first flow path loop is formed.

[0017] After the temperature rise control is implemented, if the detected value of the medium temperature detection device is within the temperature range of above the first threshold and below the second threshold which is greater than the first threshold, a second flow path loop is formed.

[0018] In the thermal management system according to the first aspect of this disclosure, when the detection value of the medium temperature detection device is lower than a first threshold after temperature rise control, a first flow path loop is formed. In this case, the temperature difference among multiple battery cells can be suppressed by the heat medium of the first flow path loop, and the heat of the heat medium of the first flow path loop is raised by the heat of the drive device. As a result, the temperature difference among multiple battery cells can be suppressed, and excessive temperature drop of the battery storage device is prevented. Furthermore, in the thermal management system according to the first aspect of this disclosure, when the detection value of the medium temperature detection device is within a temperature range above the first threshold and below a second threshold after temperature rise control, a second flow path loop is formed. In this case, the temperature difference among multiple battery cells can be suppressed by the heat medium of the second flow path loop, and the heat of the drive device is prevented from raising the temperature of the battery storage device. As a result, the temperature difference among multiple battery cells can be suppressed, and excessive temperature rise of the battery storage device is prevented.

[0019] The second flow path loop can also be a loop that separates the first flow path from the loop that connects the second and third flow paths.

[0020] With this structure, when a second flow path loop is formed, the heat of the drive unit can be discharged to the outside via a heat exchanger.

[0021] When the loop formed by connecting the first flow path, the second flow path and the third flow path is designated as the third flow path loop, the switching device can also be configured such that, after the temperature rise control, the detection value of the medium temperature detection device is greater than the second threshold, the third flow path loop is formed.

[0022] With this structure, when the third flow path is formed, the heat of the drive unit can be discharged to the outside via a heat exchanger, and the heat of the heat medium flowing through the first flow path can also be discharged to the outside via a heat exchanger. As a result, the drive unit can be cooled and excessive temperature rise of the energy storage device can be suppressed.

[0023] The thermal management system may also include a cell temperature detection device for detecting the temperature of at least two of the multiple battery cells.

[0024] The switching device can also be configured as follows:

[0025] After temperature control, if the temperature difference between at least two battery cells detected by the cell temperature detection device is above the cell temperature threshold and the value detected by the dielectric temperature detection device is below the first threshold, a first flow path loop is formed.

[0026] After temperature control, if the value of the above difference is above the cell temperature threshold and the detection value of the dielectric temperature detection device is within the temperature range, a second flow path loop is formed.

[0027] Based on this structure, it is possible to switch between forming the first flow path loop (second flow path loop) according to the temperature difference of the battery cells.

[0028] When the loop formed by connecting the first flow path, the second flow path, and the third flow path is defined as the third flow path loop,

[0029] The aforementioned switching device can also be configured such that, after temperature control, if the value of the aforementioned difference is above the cell temperature threshold and the detection value of the dielectric temperature detection device is greater than the second threshold, a third flow path loop is formed.

[0030] Based on this structure, it is possible to switch whether to form a third flow path loop according to the temperature difference of the battery cells.

[0031] The thermal management system may also include:

[0032] The pump is configured to circulate the heat medium in the second flow path;

[0033] The processor is configured to control the drive of the pump; and

[0034] The device temperature detection device is configured to detect the temperature of the drive device.

[0035] The processor can also be configured such that, after temperature control, if the value of the above-mentioned difference is above the cell temperature threshold and a second or third flow path loop is formed, the pump stops when the temperature of the device temperature detection device is below the threshold.

[0036] The processor can also be configured such that, after temperature control, when the temperature of the device temperature detection device is above the threshold value and a second or third flow path loop is formed, the pump is driven when the temperature of the device temperature detection device is above the threshold value.

[0037] With this structure, when the temperature of the drive unit is relatively low, stopping the pump prevents the drive unit from being cooled by the circulation of the hot medium. Conversely, when the temperature of the drive unit is relatively high, driving the pump allows the drive unit to be cooled by the circulation of the hot medium.

[0038] The thermal management system may also include a temperature detection device for detecting the temperature of the drive unit.

[0039] The aforementioned switching device can also be configured such that, after temperature control, a second flow path loop is formed when the value of the aforementioned difference is lower than the cell temperature threshold and the detection value of the device temperature detection device is higher than the threshold.

[0040] With this structure, it is possible to prevent the first flow path from connecting to the second flow path due to the formation of the first flow path loop, even when the temperature difference between the battery cells is relatively small. As a result, it is possible to suppress the movement of heat from the higher-temperature drive device to the battery storage device. Thus, it is possible to prevent the temperature difference between the battery cells from increasing.

[0041] The thermal management system may also include a temperature detection device for detecting the temperature of the drive unit.

[0042] The switching device can also be configured as follows:

[0043] After temperature control, if the temperature detection value of the device is above the threshold and the temperature detection value of the medium is below the first threshold, a first flow path loop is formed.

[0044] After temperature control, if the temperature detection value of the device is above the threshold and the temperature detection value of the medium is within the temperature range, a second flow path loop is formed.

[0045] After the temperature rise control is implemented, if the detection value of the device temperature detection device is above the threshold and the detection value of the medium temperature detection device is above the second threshold, a third flow path loop is formed.

[0046] With this structure, the heat from the drive unit can be utilized to raise the temperature of the heat medium in the first flow path by forming a first flow path loop. By forming a second flow path loop, the heat from the drive unit can be discharged to the outside via a heat exchanger, and the heat from the drive unit can be prevented from raising the temperature of the heat medium in the first flow path. By forming a third flow path loop, the heat from the drive unit and the heat medium in the first flow path can be discharged to the outside via a heat exchanger.

[0047] A heat exchanger may also include a radiator.

[0048] With this structure, the drive unit can be cooled by external air through a heat sink. This helps to prevent the power consumption required for cooling the drive unit from increasing.

[0049] The thermal management system may also include an oil cooler configured in the second flow path and a fourth flow path connected to the oil cooler and isolated from the second flow path.

[0050] In the fourth flow path, the lubricating oil circulates.

[0051] The drive unit includes a first device for heat exchange with oil circulating in the fourth flow path and a second device for heat exchange with a heat medium circulating in the second flow path.

[0052] With this structure, when the first flow path loop is formed, the heat medium flowing through the first flow path can be heated by the heat from both the first and second devices. As a result, the heating efficiency of the heat medium can be improved compared to the case where the heat medium flowing through the first flow path is heated only by the heat from either the first or second device.

[0053] The vehicle involved in the second aspect of this disclosure has the thermal management system involved in the first aspect described above.

[0054] Therefore, it is possible to provide a vehicle that can suppress the temperature differences among multiple battery cells and prevent excessive temperature rise (fall) of the battery storage device.

[0055] According to this disclosure, it is possible to suppress the temperature difference among multiple battery cells and to suppress excessive temperature rise (fall) of the battery storage device.

[0056] The features, advantages, and technical and industrial importance of embodiments of the present invention will now be described with reference to the accompanying drawings, wherein the same reference numerals denote the same elements. Attached Figure Description

[0057] Figure 1 This is a diagram illustrating the thermal management system in this embodiment.

[0058] Figure 2 This is a diagram showing the structure of a vehicle equipped with the thermal management system described in this embodiment.

[0059] Figure 3 This is a diagram representing the structure of the first mode of the thermal management system.

[0060] Figure 4 This is a diagram representing the structure of the second mode of the thermal management system.

[0061] Figure 5 This is a diagram representing the structure of the third mode of the thermal management system.

[0062] Figure 6 This is a flowchart illustrating the flow path switching control in a thermal management system.

[0063] Figure 7 It means Figure 6 The flowchart of a variation.

[0064] Figure 8 It means Figure 3 The diagram of the first variation.

[0065] Figure 9 It means Figure 3 The diagram for the second variation.

[0066] Figure 10 It means Figure 3 The diagram for the third variation. Detailed Implementation

[0067] Embodiments of this disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same or equivalent parts are labeled with the same reference numerals without being described repeatedly.

[0068] Figure 1 This is a diagram showing the overall structure of the thermal management system involved in this embodiment. For example... Figure 1 As shown, the thermal management system 1 has thermal circuits 110, 120, and 150.

[0069] The hot circuit 110 includes flow paths F11 to F14 and a switching device 100. One end of each of flow paths F11 to F14 is connected to the switching device 100. The switching device 100 has one input port and three output ports. The switching device 100 can also be a four-way valve (e.g., a flow control valve with a total of four ports, including input and output ports). Flow path end E1, which is one end of flow path F11, is connected to the input port of the switching device 100. On the other hand, flow paths F12, F13, and F14 are connected to the first, second, and third output ports of the switching device 100, respectively. Flow paths F11, F13, and F14 are connected at a confluence section E2. The confluence section E2 corresponds to the other end (shared flow path end) of each of flow paths F11, F13, and F14. Flow path F12 is connected to flow path F13 at a confluence section E3. The confluence section E3 corresponds to the other end of flow path F12. The switching device 100 may also be a flow control valve that has an unused (unconnected) port in addition to the four connected ports.

[0070] A pump 111, a heater 112, and a capacitor 140 are provided in flow path F11. The heater 112 is, for example, an HVH (electric high voltage heater). A heater core 114 is provided in flow path F12. A radiator 115 is provided in flow path F13. Flow path F14 is the flow path connecting the confluence section E2 and the third output port of the switching device 100, and includes a mixing section M1. The mixing section M1 will be described in detail later.

[0071] In this embodiment, the switching device 100 connects the input port to the control device (e.g., described later). Figure 2 The ECU 500 shown is connected to one or more indicated output ports. The switching device 100 connects the flow path F11 connected to the input port to, for example, flow paths F12 and F13, or flow paths F12 and F14, or only flow path F12 or F13. The switching device 100 is configured to switch the connection / disconnection between the flow path end E1 of flow path F11 and flow paths F12 to F14.

[0072] The hot circuit 120 includes flow paths F2-F4, F7, F31-F34, F41, and F42, and a switching device 300. The switching device 300 has ports P1-P13. Ports P1, P4-P8, P12, and P13 are output ports. Ports P2, P3, and P9-P11 are input ports. The switching device 300 can also be a thirteen-way valve (e.g., a flow control valve with a total of 13 ports, including input and output ports). The switching device 300 can also be a multi-functional valve with unused (unconnected) ports in addition to the 13 connected ports. Furthermore, flow path F2 and flow path F4 are examples of the "second flow path" and "first flow path" of this disclosure, respectively. Flow path F3 is an example of the "third flow path" of this disclosure.

[0073] One end of flow path F2 is connected to port P1, and the other end is connected to port P2. Flow path F2 includes a pump 121, ADAS (Advanced Driver-Assistance Systems) 122, ESU (Electric Supply Unit) 123, PCU (Power Control Unit) 124, oil cooler (O / C) 125, and reservoir 127. Drive axle (T / A) 126 is connected to oil cooler 125. Flow path F2 includes a mixing section M1. That is, the mixing section M1 is a common part of both thermal circuit 110 and thermal circuit 120. The mixing section M1 will be described in detail later. Furthermore, pump 121 is an example of a "pump" according to this disclosure. Additionally, PCU 124 and drive axle 126 are examples of a "drive device" according to this disclosure. PCU 124 and drive axle 126 are examples of a "second device" and a "first device" according to this disclosure, respectively.

[0074] One end of flow path F3 is connected to port P3. Flow path F3 branches into two flow paths (flow paths F31 and F32) at branch point E8. Branch point E8 corresponds to the other end of flow path F3. Flow path F31 of the two branches is connected to port P7, and flow path F32 is connected to port P5. At branch point E8, one end of flow path F3 and F31 is connected to port P3, and the other end is connected to port P7. At branch point E8, one end of flow path F3 and F32 is connected to port P3, and the other end is connected to port P5. A heat sink 200 is provided in flow path F3. According to the flow path formed by flow path F3 and flow path F31 or F32, the hot medium flowing out of the switching device 300 passes through the heat sink 200 (i.e., exchanges heat with the heat sink 200) and returns to the switching device 300. Furthermore, one end of flow path F33 is connected to port P3, and the other end is connected to port P4. One end of flow path F34 is connected to port P3, and the other end is connected to port P6. According to flow paths F33 and F34, the hot medium flowing out of switching device 300 returns to switching device 300 without passing through radiator 200. Furthermore, radiator 200 is an example of the "heat exchanger" and "radiator" disclosed herein.

[0075] One end of flow path F4 is connected to port P11, and the other end is connected to port P12. A battery 400 is provided in flow path F4. According to flow path F4, the heat medium flowing out of the switching device 300 passes through the battery 400 (i.e., exchanges heat with the battery 400) and returns to the switching device 300. Additionally, one end of flow path F41 is connected to port P10, and the other end is connected to port P12. One end of flow path F42 is connected to port P11, and the other end is connected to port P13. According to each flow path F41 and F42, the heat medium flowing out of the switching device 300 returns to the switching device 300 without passing through the battery 400. Furthermore, the battery 400 is an example of the "energy storage device" of this disclosure.

[0076] One end of flow path F7 is connected to port P8, and the other end is connected to port P9. A pump 170 and a cooler 160 are installed in flow path F7.

[0077] The switching device 300 includes a rotating member 310 (inner peripheral unit) and a housing 320 (outer peripheral unit). The housing 320 is formed in an annular shape (e.g., circular). The rotating member 310 is formed in a disk shape. The rotating member 310 is located inside the housing 320. The housing 320 is configured to surround the outer peripheral surface of the rotating member 310. The rotating member 310 is configured to rotate relative to the housing 320. In this embodiment, the housing 320 is fixed and driven to rotate by the rotating member 310. The rotating member 310 and the housing 320 can also be sealed by a gasket (not shown).

[0078] Flow paths 301 to 304 are formed inside the rotating component 310. Flow paths 301 to 304 connect two ports among ports P1 to P13 inside the rotating component 310. The combination (4 pairs) of ports connected by flow paths 301 to 304 is determined by the rotational position (rotation angle) of the rotating component 310.

[0079] Rotating component 310 according to the control device (e.g., described later) Figure 2The ECU 500 shown is rotated according to the instructions. A control device, for example, instructs the actuator (not shown) that rotates the rotating member 310 by the amount or position of rotation. The rotating member 310 rotates, for example, with its center R2 as the axis of rotation. In this embodiment, the rotational position of the rotating member 310 is indicated by the angle between the reference position R0 of the housing 320 and the reference position R1 of the rotating member 310. Depending on the rotational position of the rotating member 310, the connection method of each port inside the rotating member 310 changes. Specifically, by rotating the rotating member 310 relative to the housing 320, the connection destinations of flow paths 301-304 change. Thus, ports P1-P13 that were previously disconnected become connected, or ports that were previously connected become disconnected, or the connection destinations of connected ports change.

[0080] The heat circuit 150 includes various devices for temperature adjustment according to the refrigeration cycle (i.e., the cycle of evaporation, compression, condensation, and expansion). Specifically, the heat circuit 150 includes flow paths F51 and F52. Flow path F51 forms a loop for the circulation of the heat medium. A compressor 151, an expansion valve 155, a capacitor 140 (heat exchanger), and a cooler 160 are provided in flow path F51. An expansion valve 152, an evaporator 153, and an EPR (Evaporative Pressure Regulator) 154 are provided in flow path F52. One end of flow path F52 connects to flow path F51 at a branch point E4, and the other end connects to flow path F51 at a confluence point E5. Branch point E4 corresponds to the upstream end of flow path F52. Confluence point E5 corresponds to the downstream end of flow path F52.

[0081] Hot circuits 110 and 150 are separate and not interconnected. However, flow paths F11 of hot circuit 110 and F51 of hot circuit 150 are connected via capacitor 140 to allow heat exchange. Capacitor 140 is connected to both hot circuits 110 and 150. Furthermore, heat sinks 115 of hot circuit 110 and 200 of hot circuit 120 are configured to allow heat exchange. Heat sinks 115 and 200 are, for example, configured to be close to allowing heat exchange.

[0082] Hot circuits 120 and 150 are separate and not connected. However, flow path F7 of hot circuit 120 and flow path F51 of hot circuit 150 are connected via cooler 160 to exchange heat with each other. Cooler 160 is connected to both hot circuits 120 and 150.

[0083] A first heat medium flows in both hot circuit 110 and hot circuit 120. A second heat medium flows in hot circuit 150. In this embodiment, the same type of heat medium (the first heat medium) as the heat medium flowing in hot circuit 110 flows in hot circuit 120. Known heat media can be used as the first and second heat media. Examples of the second heat medium include hydrofluorocarbon refrigerants, hydrofluoroolefin refrigerants, carbon dioxide (CO2), and propane gas. In this embodiment, a liquid heat medium (e.g., water or a coolant other than water) is used as the first heat medium. Examples of coolants other than water include insulating oil or antifreeze (e.g., LLC (Long Life Coolant)). In this embodiment, pumps 111, 121, and 170 are water pumps (W / P).

[0084] Pump sensors PS1, PS2, and PS3 are respectively installed in pumps 111, 121, and 170. Pump sensors PS1 to PS3 are configured to detect the state of the corresponding pump (e.g., rotational speed, current, and temperature). Additionally, flow path sensors T1, T2, T3, T4, F51, and F7 are respectively installed in flow paths F11, F2, F3, F4, F51, and F7. Flow path sensors T1 to T5 and T7 respectively include a temperature sensor for detecting the temperature of the hot medium within the corresponding flow path and a flow sensor for measuring the flow rate of the hot medium flowing in the corresponding flow path. Furthermore, flow path sensor T4 is an example of the "medium temperature detection device" disclosed herein.

[0085] Device sensor T11 and device sensor T12 are respectively provided in the battery 400 and the drive axle 126. Device sensor T11 detects the temperature of at least two of the multiple battery cells 401 contained in the battery 400. For example, device sensor T11 detects the temperature of all the multiple battery cells 401. Device sensor T12 detects the temperature of the drive axle 126. Furthermore, device sensor T11 and device sensor T12 are examples of the "cell temperature detection device" and "device temperature detection device" of this disclosure, respectively.

[0086] Figure 2 This is a diagram illustrating an example of the structure of a vehicle equipped with a thermal management system 1. (Refer to...) Figure 1 and Figure 2Vehicle 10 is an electric vehicle (xEV) equipped with a thermal management system 1. Vehicle 10 is configured to operate using electricity output from battery 400. Battery 400 functions as a driving energy storage device. Battery 400 may also include, for example, multiple energy storage cells 401 (secondary batteries) such as lithium-ion batteries, nickel-metal hydride batteries, or sodium-ion batteries. That is, multiple energy storage cells 401 may also form a battery pack. The type of energy storage cell 401 can be either a liquid secondary battery or a solid-state secondary battery. Other energy storage devices (such as double-layer capacitors) may also be used instead of secondary batteries. Vehicle 10 is, for example, a battery electric vehicle (BEV) without an internal combustion engine. However, it is not limited to this; vehicle 10 may be a PHEV (plug-in hybrid electric vehicle) with an internal combustion engine, or other electric vehicles (xEVs). Furthermore, in Figure 2 For simplicity, only three battery cells 401 are shown in the diagram.

[0087] Vehicle 10 is equipped with an ECU (Electronic Control Unit) 500 and an HMI (Human Machine Interface) 700. The HMI 700 functions as an interface between the user and the ECU 500. The HMI 700 includes input devices and reporting devices. The input devices accept input from the user (e.g., operations on the control unit or voice input). The reporting devices report to the user via display or sound (including audio). The HMI 700 is, for example, an in-vehicle HMI. However, a user-portable mobile terminal can also be used as an HMI.

[0088] ECU 500 includes a processor 510 and a storage device 520. An example of the processor 510 is a CPU (Central Processing Unit). ECU 500 may have one or more processors. The storage device 520 may include at least one of an HDD (Hard Disk Drive), an SSD (Solid State Drive), and non-volatile memory. In addition to programs, the storage device 520 of ECU 500 stores various information that can be used by the programs. In this embodiment, the processor 510 executes the programs stored in the storage device 520, and ECU 500 performs various controls. However, these processes may also be performed without software, solely through hardware (e.g., logic circuits such as wiring logic).

[0089] Vehicle 10 also includes a pump (EOP, electric oil pump) 31, an oil circuit 32, an SMR (System Main Relay) 410, a BMS (Battery Management System) 420, an air conditioning unit 600, and an external temperature sensor T6. The external temperature sensor T6 is configured to detect the external temperature of vehicle 10 (the temperature of the external air surrounding vehicle 10). Furthermore, the oil circuit 32 is an example of the "fourth flow path" of this disclosure.

[0090] Battery 400 supplies voltage to power line PL. Vehicle 10 may also include an auxiliary battery (not shown). The auxiliary battery may also provide power at a voltage lower than that of battery 400 (power line PL) (e.g., power for driving auxiliary equipment). SMR410 is located in power line PL between battery 400 and PCU124. BMS420 contains various sensors that detect the state of battery 400 (e.g., voltage, current, and temperature) and outputs the detection results to ECU500. In addition to the aforementioned sensor functions, BMS420 may also have at least one of SOC (State Of Charge) estimation function and SOH (State of Health) estimation function. Pump 31, ESU123, PCU124, SMR410, and air conditioning unit 600 are controlled by ECU500.

[0091] The air conditioning unit 600 is connected to the power line PL and receives power from the battery 400. In the vehicle 10, the heating circuit of the air conditioning unit 600 constitutes the thermal circuit 110. Figure 1 The refrigeration circuit of the air conditioning unit 600 constitutes the heat circuit 150. Figure 1 The air conditioning unit 600 is configured to utilize a heater 112 ( Figure 1 The heat generated is used to heat the vehicle interior. Additionally, the air conditioning unit 600 includes a heat pump system. The air conditioning unit 600 can also utilize waste heat for heat pump heating.

[0092] When SMR410 is connected, battery 400 applies voltage to PCU124. PCU124 functions as the drive circuit of drive axle 126. Specifically, drive axle 126 of vehicle 10 includes MG (Motor Generator) 21, gearbox 22, and wheel speed sensors 23. MG21 functions as a drive motor, rotating the drive wheels of vehicle 10. The number of drive motors in vehicle 10 is arbitrary and can be configured for each axle or each wheel. PCU124 is connected to power line PL and uses power supplied from battery 400 to drive MG21. PCU124 may include, for example, a frequency converter. Gearbox 22 may include, for example, a reducer and differential gear mechanism. MG21 converts electricity into torque. This torque is transmitted to the drive wheels of vehicle 10 via gearbox 22. Additionally, MG21 may regenerate electricity to charge battery 400, for example, during deceleration of vehicle 10. The wheel speed sensor 23 is installed on the wheel of the vehicle 10 or on the axle that rotates in conjunction with the wheel to detect the rotational speed of the wheel.

[0093] The drive axle 126 also includes braking and steering mechanisms (not shown). The ADAS 122 can also control the drive axle 126 for driving assistance. The ADAS 122 includes devices for driving assistance (including computing circuitry for information processing) and sensors (such as environmental recognition sensors like cameras, millimeter-wave radar, or lidar).

[0094] Pump 31 circulates lubricating oil in oil circuit 32. A temperature sensor 33 is installed in oil circuit 32 to detect the temperature of the oil (lubricating oil) within it. Oil cooler 125 is connected to flow path F2 (… Figure 1 The oil cooler 125 connects to the oil circuit 32 and functions as a heat exchanger. The oil cooler 125 uses a hot medium flowing in the flow path F2 to cool the lubricating oil in the oil circuit 32. The oil circuit 32 supplies lubricating oil to the MG21 and gearbox 22, cooling them. However, this is not a limitation; the cooling method around the motor can be appropriately changed. For example, one of the MG21 and gearbox 22 can be oil-cooled via the oil circuit 32, while the other can be water-cooled via the flow path F2.

[0095] Vehicle 10 is configured to perform external charging (charging of battery 400 via power from outside the vehicle). ESU 123 is located on the charging cable CHL and includes a charging interface 11, a charging circuit 12 (on-board charger), and a charging relay 13. The charging relay 13 switches the connection / disconnection of the charging cable CHL. Before initiating external charging, ECU 500 connects the charging relay 13 and SMR 410, and controls ESU 123 during the external charging process. Figure 2 As shown, if the front end (charging gun) of the charging cable connected to the EVSE (Electric Vehicle Supply Equipment) 800 is connected (inserted) to the charging interface 11 of the vehicle 10 in the parked state, the vehicle 10 is electrically connected to the EVSE 800. The charging circuit 12 uses the power input from the EVSE 800 to the charging interface 11 to charge the battery 400. The ESU 123 may also include a circuit for external power supply (power supply to the outside of the vehicle through the power of the battery 400) (discharge circuit). The ESU 123 may also have V2H (Vehicle to Home) function and / or V2L (Vehicle to Load) function. The charging circuit 12 can also function as a charge and discharge circuit. Figure 2 In the example shown, one end of the charging cable CHL is connected between the SMR410 and PCU124, and the other end of the charging cable CHL is connected to the charging interface 11. However, this is not a limitation; one end of the charging cable CHL can also be connected between the battery 400 and the SMR410.

[0096] Figure 2 The multiple on-board devices shown can also be integrated as an "Xin1" structure electric axle. Examples of the "Xin1" structure include a "3-in1" structure integrating the drive motor, inverter, and gearbox; a "6-in1" structure further integrating the DC / DC converter, on-board charger, and BMS; and an "8-in1" structure further integrating the power distribution unit (PDU) and ECU. Electric axles can also be installed at both the front and rear sides of the vehicle 10. The thermal circuit 120 can also be configured to cool these electric axles.

[0097] As described above, the vehicle 10 involved in this embodiment has Figure 1The thermal management system 1 is shown. In vehicle 10, PCU 124 is cooled by a heat medium flowing through flow path F2. Additionally, lubricating oil in oil circuit 32 is cooled by the heat medium flowing through flow path F2, and MG21 is cooled by this lubricating oil. Thus, flow path F2 is configured to cool PCU 124 and drive axle 126 via the heat medium. Furthermore, battery 400 is cooled by a heat medium flowing through flow path F4. Flow path F4 is configured to cool battery 400 via the heat medium. Additionally, radiator 200 is configured to cool the heat medium flowing through flow path F3. Each pump (pump 111, 121, 170) circulating the heat medium is controlled by ECU 500. ECU 500 can also use pump drive signals to perform PWM (Pulse Width Modulation) control of each pump. The pump drive signal, for example, indicates the duty cycle (the ratio of the high-level period to the cycle) for a pump drive indication (high / low level drive signal). ECU500 (processor 510) can also be used. Figure 1 and Figure 2 The outputs of the various sensors shown obtain the state of the vehicle 10, and control the thermal management system 1 (e.g., each pump and each switching device) based on the obtained state of the vehicle 10.

[0098] The thermal management system 1 includes a thermal circuit 110 and a thermal circuit 120. Both thermal circuits 110 and 120 share a mixing section M1. Specifically, thermal circuit 110 includes a flow path F11 containing a pump 111, a flow path F14 containing the mixing section M1, and a switching device 100. The switching device 100 is configured to switch the connection / disconnection between the flow path end E1 of flow path F11 and flow path F14. Thermal circuit 120 includes a flow path F2 containing a pump 121 and the mixing section M1. At the confluence section E6, which is one end of the mixing section M1, flow paths F2 and F14 merge; at the branching section E7, which is the other end of the mixing section M1, flow paths F2 and F14 branch. In this embodiment, when the flow path end E1 of flow path F11 is connected to flow path F14 via switching device 100, ECU 500 performs coordinated control of pumps 111 and 121 to mix the hot medium circulating in hot circuit 110 via pump 111 with the hot medium circulating in hot circuit 120 via pump 121 in mixing section M1. Hereinafter, refer to... Figures 3-6 The control method of the thermal management system 1 operated by ECU500 is explained.

[0099] Figure 3 This is a diagram representing the thermal management system 1 in mode 1. (Refer to...) Figure 3In the first mode, the switching device 100 connects the flow path end E1 of flow path F11, which is connected to the input port, to flow paths F12 and F14 respectively. The hot medium circulated in the hot circuit 110 by the pump 111 flows from flow path F11 to flow paths F12 and F14 respectively through the switching device 100. In the first mode, the switching device 300 is controlled to make the rotating component 310 ( Figure 1 The rotational position of ) becomes angle θ1. Then, the switching device 300 divides the thermal circuit 120 into Figure 3 The diagram shows two thermal loops 120A and 120B. Thermal loop 120A corresponds to a fluid loop from flow path F2 via flow path F4 and flow path 303 and back to flow path F2. Thermal loop 120B corresponds to a fluid loop from flow path F7 via flow path F4, flow path F34 and flow path 301 and back to flow path F7. Furthermore, thermal loop 120A is an example of the "first flow path loop" of this disclosure.

[0100] Figure 4 This is a diagram representing the thermal management system 1 in mode 2. (Refer to...) Figure 4 In the second mode, the switching device 100 connects the flow path end E1 of flow path F11, which is connected to the input port, to flow paths F12 and F14 respectively. The hot medium circulated in the hot circuit 110 by the pump 111 flows from flow path F11 to flow paths F12 and F14 respectively through the switching device 100. In the second mode, the switching device 300 is controlled to make the rotating component 310 ( Figure 1 The rotational position of ) becomes angle θ2. Then, the switching device 300 divides the thermal circuit 120 into Figure 4 The diagram shows two thermal loops 120C and 120D. Thermal loop 120C corresponds to a fluid loop from flow path F2 via flow path 304, flow path F32, flow path F3, and flow path 301 back to flow path F2. Thermal loop 120D corresponds to a fluid loop from flow path F7 via flow path 302, flow path F4, and flow path 303 back to flow path F7. Furthermore, thermal loop 120D is an example of the "second flow path loop" of this disclosure.

[0101] Figure 5 This is a diagram representing thermal management system 1 in mode 3. (Refer to...) Figure 5 In the third mode, the switching device 100 connects the flow path end E1 of flow path F11, which is connected to the input port, to flow paths F12 and F14 respectively. The hot medium circulated in the hot circuit 110 by the pump 111 flows from flow path F11 to flow paths F12 and F14 respectively through the switching device 100. In the third mode, the switching device 300 is controlled to make the rotating component 310 ( Figure 1 The rotational position of ) becomes angle θ3. Specifically, ECU500 controls switching device 300 to make thermal circuit 120 become Figure 5 The pattern shown. Figure 5 The thermal circuit 120 shown includes Figure 5 The thermal loop 120E is shown. Thermal loop 120E corresponds to a fluid loop from flow path F2 through flow path F303, flow path F32, flow path F3, flow path 302, flow path F7, flow path 301, flow path F4, and flow path 304 back to flow path F2. Furthermore, thermal loop 120E is an example of the "third flow path loop" of this disclosure.

[0102] ECU 500 (processor 510) performs control to heat up battery 400, for example, before (or during) charging of battery 400. This improves the charging efficiency of battery 400. Specifically, ECU 500 can also heat up battery 400 by utilizing heat generated by drive axle 126 and PCU 124, etc. This control to heat up battery 400 (hereinafter referred to as heating control) is an example of the "heating control" of this disclosure.

[0103] Here, when the battery is heated, there may be temperature differences among the multiple battery cells. To eliminate these temperature differences, heat exchange between the energy storage device and a heat transfer medium such as cooling water is considered. In this case, it is desirable to prevent the battery temperature from excessively rising (falling) due to heat exchange between the battery and the heat transfer medium.

[0104] Therefore, in this embodiment, after the temperature rise control, when the temperature of the heat medium in the flow path F4 detected by the flow path sensor T4 is lower than the threshold Tb, the switching device 300 forms the first mode heat circuit 120A. Figure 3 Additionally, after temperature control, when the temperature of the heat medium in flow path F4 detected by flow path sensor T4 is within the temperature range above threshold Tb and below threshold Tc, the switching device 300 forms a second-mode heat loop 120D. Figure 4 Furthermore, the threshold Tc is greater than the threshold Tb. Additionally, the aforementioned temperature range can also be a temperature range suitable for charging the battery 400, etc. Furthermore, the threshold Tc is an example of the "second threshold" of this disclosure.

[0105] By forming a thermal circuit 120A, the temperature difference among multiple battery cells can be suppressed (temperature homogenization) by the thermal medium circulating in the thermal circuit 120A, and the thermal medium of the thermal circuit 120A is heated by the heat from the drive bridge 126, etc. As a result, the temperature difference among multiple battery cells 401 can be suppressed, and excessive temperature drop of the battery 400 can be prevented. Furthermore, by forming a thermal circuit 120D, the temperature difference among multiple battery cells 401 can be suppressed by the thermal medium circulating in the thermal circuit 120D, and the heat from the drive bridge 126, etc., can be prevented from causing the battery 400 to heat up. As a result, the temperature difference among multiple battery cells 401 can be suppressed, and excessive temperature rise of the battery 400 can be prevented.

[0106] Control process

[0107] Reference Figure 6 The control flow of the thermal management system 1 according to this embodiment will be described. Furthermore, Figure 6 The control shown is handled by ECU500 (processor 510).

[0108] In step S1, the ECU 500 controls the temperature rise of the battery 400 using the heat generated by the drive axle 126 (PCU 124). Alternatively, in step S1, the battery 400 can also be heated by the heat from a heater, for example.

[0109] In step S2, the ECU500 determines, based on the detection value of the device sensor T11, whether the temperature difference between the battery cell 401 with the highest temperature and the battery cell 401 with the lowest temperature is lower than a threshold Ta. If the temperature difference is lower than the threshold Ta (yes in S2), the process proceeds to step S12. If the temperature difference is higher than the threshold Ta (no in S2), the process proceeds to step S3. Furthermore, the aforementioned temperature difference is an example of the "value based on difference" in this disclosure. Additionally, the threshold Ta is an example of the "cell temperature threshold" in this disclosure.

[0110] In step S3, ECU500 determines whether the temperature of the heat medium in flow path F4 is lower than the threshold Tb based on the detection value of flow path sensor T4. If the detection value of flow path sensor T4 (temperature of the heat medium in flow path F4) is lower than the threshold Tb (yes in S3), the process proceeds to step S4. If the detection value of flow path sensor T4 (temperature of the heat medium in flow path F4) is higher than the threshold Tb (no in S3), the process proceeds to step S6. Furthermore, the threshold Tb is an example of the "first threshold" of this disclosure.

[0111] In step S4, ECU 500 controls the switching device 300 to rotate the component 310 ( Figure 1 The rotation position of ) becomes angle θ1 to form the first mode ( Figure 3Next, proceed to step S5.

[0112] In step S5, ECU500 drives pumps 121 and 31. This causes the heat medium to circulate in the thermal circuit 120A and the lubricating oil to circulate in the oil circuit 32. Afterwards, the process returns to step S2. This causes heat exchange between the heat medium and the lubricating oil in the oil cooler 125. As a result, the heat medium is heated.

[0113] In step S6, ECU500 determines whether the temperature of the heat medium in flow path F4 is within the temperature range above threshold Tb and below threshold Tc based on the detection value of flow path sensor T4. If the detection value of flow path sensor T4 (temperature of the heat medium in flow path F4) is within the above temperature range (yes in S6), the process proceeds to step S7. If the detection value of flow path sensor T4 (temperature of the heat medium in flow path F4) is greater than threshold Tc (no in S6), the process proceeds to step S8.

[0114] In step S7, ECU 500 controls the switching device 300 to rotate the component 310 ( Figure 1 The rotation position of ) becomes angle θ2 to form the second mode ( Figure 4 Next, the process proceeds to step S9.

[0115] In step S8, ECU 500 controls the switching device 300 to rotate the component 310 ( Figure 1 The rotation position of ) becomes angle θ3 to form the third mode ( Figure 5 Next, the process proceeds to step S9.

[0116] In step S9, ECU 500 determines whether the temperature of drive axle 126 is below a threshold Td based on the detection value of device sensor T12. If the temperature of drive axle 126 is below the threshold Td (yes in S9), the process proceeds to step S10. If the temperature of drive axle 126 is above the threshold Td (no in S9), the process proceeds to step S11. Furthermore, the threshold Td can also be a value suitable for placing drive axle 126 within a temperature range (e.g., the upper or lower limit of the aforementioned temperature range). Additionally, the threshold Td is an example of the "threshold" of this disclosure.

[0117] In step S10, ECU 500 stops at least one of pumps 121 and 31. For example, ECU 500 stops both pumps 121 and 31. Additionally, ECU 500 also stops pump 170. This suppresses heat dissipation from the drive axle 126. Furthermore, ECU 500 can also drive pump 170 when a second mode is configured. In this case, ECU 500 can also stop compressor 151. Next, the process returns to step S2.

[0118] In step S11, ECU 500 drives pumps 121 and 31. Additionally, ECU 500 also drives pump 170. Furthermore, in the case of a third mode, ECU 500 may drive only either pump 121 or pump 170. Alternatively, in the case of a second mode, ECU 500 may stop pump 170. Next, the process returns to step S2.

[0119] In step S12, the ECU 500 determines whether the temperature of the drive axle 126 is below the threshold Td based on the detection value of the device sensor T12. If the temperature of the drive axle 126 is below the threshold Td (yes in S12), the process ends. If the temperature of the drive axle 126 is above the threshold Td (no in S12), the process proceeds to step S13. Furthermore, the threshold in step S12 can also be a value different from the threshold Td.

[0120] In step S13, ECU500 controls the switching device 300 to rotate the component 310 ( Figure 1 The rotation position of ) becomes angle θ2 to form the second mode ( Figure 4 Next, the process proceeds to step S14.

[0121] In step S14, ECU 500 drives pumps 121 and 31. Additionally, ECU 500 can also stop pump 170. Next, the process returns to step S12.

[0122] also, Figure 6 The process shown is just one example and may not be limited to the above example. For example, steps S5, S9~S11, S14, etc. can also be omitted.

[0123] As described above, in this embodiment, after temperature control, if the detection value of the flow path sensor T4 is below the threshold Tb, a thermal circuit 120A is formed; and after temperature control, if the detection value of the flow path sensor T4 is within the temperature range above the threshold Tb and below the threshold Tc, a thermal circuit 120D is formed. Thus, by forming the thermal circuit 120A, the temperature difference of the battery cell 401 can be suppressed by the flow of the thermal medium in the flow path F4, and the temperature drop of the battery 400 can be suppressed by the heat of the drive bridge 126. Furthermore, since the drive bridge 126 is cooled, the thermal effects on the drive bridge 126 (e.g., heat-induced degradation) caused by maintaining it at a high temperature can be suppressed. Additionally, by forming the thermal circuit 120D, the temperature difference of the battery cell 401 can be suppressed by the flow of the thermal medium in the flow path F4, and since thermal isolation is achieved between the drive bridge 126 and the battery 400, the temperature rise of the battery 400 due to the heat of the drive bridge 126 can be suppressed.

[0124] Variations

[0125] Figure 7 yes Figure 6 A variation of the flowchart. For... Figure 6 The same processing steps will not be described in detail.

[0126] After the temperature control in step S1, the determination in step S12 is performed. If the temperature of the drive axle 126 is below the threshold Td (yes in S12), the process ends. If the temperature of the drive axle 126 is above the threshold Td (no in S12), the process proceeds to step S3. Furthermore, Figure 7 The threshold in step S12 can also be the same as... Figure 6 The threshold values ​​for step S12 are different.

[0127] exist Figure 7 In the process, after steps S7 and S8, step S11 is then executed. Furthermore, for other processes, [the process is similar to...]. Figure 6 The processing is the same.

[0128] Figure 8 yes Figure 3 The first variation of the first pattern. Figure 8 In this process, the switching device 100 connects the flow path end E1 of flow path F11, which is connected to the input port, to flow paths F12 and F14 respectively. The hot medium circulating in the hot circuit 110 using the pump 111 flows from flow path F11 to flow paths F12 and F14 respectively through the switching device 100. The switching device 300 is controlled to make the rotating component 310 ( Figure 1 The rotational position of ) becomes angle θ4. Then, the switching device 300 divides the thermal circuit 120 into Figure 8The two thermal loops 120F and 120G are shown. Thermal loop 120F corresponds to a fluid loop from flow path F2 via flow path F4 and flow path F2 and back to flow path F2. Thermal loop 120G corresponds to a fluid loop from flow path F7 via flow path F4, flow path F32, flow path F3 and flow path 301 and back to flow path F7. Furthermore, thermal loop 120F is an example of the "first flow path loop" of this disclosure.

[0129] Figure 9 express Figure 3 The second variation of the first pattern. Figure 9 In this process, the switching device 100 connects the flow path end E1 of flow path F11, which is connected to the input port, to flow paths F12 and F14 respectively. The hot medium circulating in the hot circuit 110 using the pump 111 flows from flow path F11 to flow paths F12 and F14 respectively through the switching device 100. The switching device 300 is controlled to make the rotating component 310 ( Figure 1 The rotational position of ) becomes angle θ5. Specifically, ECU500 controls switching device 300 to make thermal circuit 120 become Figure 9 The pattern shown. Figure 9 The illustrated thermal circuit 120 includes thermal circuit 120H. Thermal circuit 120H corresponds to a fluid circuit returning from flow path F2 to flow path F2 via flow path F2 through flow path F4, flow path F4, flow path 302, flow path F7, flow path 303, flow path F34, and flow path 304. Furthermore, in this case, compressor 151 can also be stopped. Additionally, thermal circuit 120H is an example of the "first flow path circuit" of this disclosure.

[0130] Figure 10 express Figure 3 The third variation of the first pattern. In Figure 10 In this process, the switching device 100 connects the flow path end E1 of flow path F11, which is connected to the input port, to flow paths F12 and F14 respectively. The hot medium circulating in the hot circuit 110 via pump 111 flows from flow path F11 to flow paths F12 and F14 respectively through the switching device 100. The switching device 300 is controlled to make the rotating component 310 ( Figure 1 The rotational position of ) becomes angle θ6. Specifically, ECU500 controls switching device 300 to make thermal circuit 120 become Figure 10 The pattern shown. Figure 10 The illustrated thermal circuit 120 includes thermal circuit 120I. Thermal circuit 120I corresponds to a fluid circuit from flow path F2 via flow path F303, flow path F34, flow path 302, flow path F7, flow path 301, flow path F4, and flow path 304 back to flow path F2. Furthermore, in this case, compressor 151 can also be stopped. Additionally, thermal circuit 120I is an example of the "first flow path circuit" of this disclosure.

[0131] In the above embodiments, examples are shown where heat from the drive axle 126 (PCU 124) is dissipated via the radiator 200 in modes 2 and 3, but this disclosure is not limited thereto. Heat from the drive axle 126 (PCU 124) can also be dissipated via the cooler 160 and the thermal circuit 150. In this case, the compressor 151 can also be driven. For example, if heating is requested from a user of the vehicle 10, heat from the drive axle 126 (PCU 124) can be dissipated via the cooler 160 and the thermal circuit 150. This improves heating efficiency (reduces power consumption due to heating). Furthermore, in this case, the cooler 160 is an example of a "heat exchanger" of this disclosure.

[0132] In the above embodiments, examples are shown where the thermal management system 1 includes a switching device 300 as a 13-way valve and a switching device 100 as a 4-way valve, but this disclosure is not limited to this. The thermal management system may also include multiple multi-way valves configured differently than those described above. Furthermore, the number of multi-way valves is not limited to two. For example, the number of multi-way valves may be one or more. Additionally, multi-way valves are not limited to rotary valves; for example, they may be configured as slide valves.

[0133] In the above embodiments, an example is shown where flow path F2 and flow path F3 are connected in the second mode, but this disclosure is not limited thereto. In the second mode, flow path F2 and flow path F3 can also be isolated.

[0134] In the above embodiments, it is shown that in Figure 6 The example of forming the third mode in step S6 when the temperature of the heat medium in flow path F4 is greater than the threshold Tc is not limited to this. For example, the process can also be terminated when it is determined in step S6 that the temperature of the heat medium in flow path F4 is greater than the threshold Tc. Furthermore, this variation can also be implemented in... Figure 7 The process shown is applied in this way.

[0135] In the above embodiments, the first mode ( Figure 3 The example shown is that the heat medium of the heat circuit 120A is circulated by pump 121, but this disclosure is not limited thereto. For example, the heat medium of the heat circuit 120A can also be circulated by a pump configured in flow path F4.

[0136] In the above embodiments, the second mode is shown. Figure 4 The example described is that the heat medium of the heat circuit 120C is circulated by pump 121 under the condition of ( ), but this disclosure is not limited to this. For example, the heat medium of the heat circuit 120C can also be circulated by a pump configured in flow path F3. In addition, the heat medium of the heat circuit 120D can also be circulated by a pump configured in flow path F4. It is also possible that, in the third mode ( Figure 5In the following case, the heat medium in the heat circuit 120E is circulated by a pump configured in flow path F3 or flow path F4.

[0137] In the above embodiment, an example is shown where the temperature difference between the battery cell 401 with the highest temperature and the battery cell 401 with the lowest temperature among a plurality of battery cells 401 is determined to be lower than a threshold Ta, but this disclosure is not limited thereto. For example, it is also possible to determine whether the difference between the average temperature of the plurality of battery cells 401 and the temperature of the battery cell 401 with the highest (or lowest) temperature is lower than a predetermined threshold. Alternatively, it is also possible to detect the temperature of only a portion of the battery cells (e.g., the battery cell in the center and the battery cells at both ends in the battery cell arrangement direction) without detecting the temperature of all the battery cells 401.

[0138] In the above embodiments, it is shown that in Figure 6 The example in step S9 where pumps 121 and 31 are stopped when the temperature of the drive axle 126 is below the threshold Td is an example, but this disclosure is not limited thereto. It is also possible that pumps 121 and 31 are driven to cool the drive axle 126 even when the temperature of the drive axle 126 is below the threshold Td.

[0139] The above-described embodiments and their variations can also be combined with each other.

[0140] The embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of this disclosure is not shown by the description of the embodiments above, but by the technical solutions, and is intended to include all changes within the meaning and scope of equivalent technical solutions.

Claims

1. A thermal management system, characterized in that, Include: The first flow path is for the circulation of the heating medium; The second flow path is configured for the circulation of the heating medium; The third flow path is for the circulation of the heating medium; An energy storage device includes multiple energy storage cells and is configured to exchange heat with the heat medium of the first flow path; The driving device is configured to exchange heat with the heat medium in the second flow path and generate driving force. A heat exchanger is located in the third flow path; The switching device is configured to switch the connection state between the first flow path, the second flow path, and the third flow path; as well as The medium temperature detection device is configured to detect the temperature of the hot medium flowing in the first flow path. in, The loop comprising the interconnected first flow path and the second flow path, and isolated from the third flow path, is designated as the first flow path loop. Furthermore, the loop containing the first flow path that is isolated from the second flow path is designated as the second flow path loop. And when the control that causes the energy storage device to heat up is set to heat-up control, The switching device is configured as follows: After the temperature rise control, if the detected value of the medium temperature detection device is lower than the first threshold, the first flow path loop is formed. After the temperature rise control, if the detected value of the medium temperature detection device is within the temperature range of above the first threshold and below the second threshold which is greater than the first threshold, the second flow path loop is formed.

2. The thermal management system according to claim 1, characterized in that, The second flow path loop is a loop that isolates the first flow path from the loop that connects the second flow path and the third flow path.

3. The thermal management system according to claim 2, characterized in that, When the loop formed by connecting the first flow path, the second flow path, and the third flow path is designated as the third flow path loop, The switching device is configured such that, after the temperature rise control, if the detected value of the medium temperature detection device is greater than the second threshold, the third flow path loop is formed.

4. The thermal management system according to any one of claims 1 to 3, characterized in that, It also includes a cell temperature detection device for detecting the temperature of at least two of the plurality of battery cells. in, The switching device is configured as follows: After the temperature rise control, if the difference in temperature between the at least two battery cells detected by the battery cell temperature detection device is above the battery cell temperature threshold and the value detected by the dielectric temperature detection device is below the first threshold, then the first flow path loop is formed. After the temperature rise control, if the value of the difference is above the cell temperature threshold and the detection value of the dielectric temperature detection device is within the temperature range, the second flow path loop is formed.

5. The thermal management system according to claim 4, characterized in that, When the loop formed by connecting the first flow path, the second flow path, and the third flow path is designated as the third flow path loop, The switching device is configured such that, after the temperature rise control, if the value of the difference is above the cell temperature threshold and the detection value of the dielectric temperature detection device is greater than the second threshold, the third flow path loop is formed.

6. The thermal management system according to claim 5, characterized in that, Also includes: The pump is configured to circulate the heat medium in the second flow path; The processor is configured to control the drive of the pump; and The device temperature detection unit is configured to detect the temperature of the drive device. in, The processor is configured such that, After the temperature rise control, if the difference value is above the cell temperature threshold and either the second flow path loop or the third flow path loop is formed, the pump will stop when the temperature of the device temperature detection device is below the threshold. After the temperature rise control, if the value of the difference is above the cell temperature threshold and the second flow path loop or the third flow path loop is formed, the pump is driven when the temperature of the device temperature detection device is above the threshold.

7. The thermal management system according to claim 4, characterized in that, It also includes a temperature detection device configured to detect the temperature of the drive unit. in, The switching device is configured such that, after the temperature rise control, if the value of the difference is lower than the cell temperature threshold and the detection value of the device temperature detection device is higher than the threshold, the second flow path loop is formed.

8. The thermal management system according to claim 3, characterized in that, It also includes a temperature detection device configured to detect the temperature of the drive unit. in, The switching device is configured as follows: After the temperature rise control, if the detected value of the device temperature detection device is above the threshold and the detected value of the medium temperature detection device is below the first threshold, then the first flow path loop is formed. After the temperature rise control, if the detected value of the device temperature detection device is above the threshold and the detected value of the medium temperature detection device is within the temperature range, then the second flow path loop is formed. After the temperature rise control, if the detection value of the device temperature detection device is above the threshold and the detection value of the medium temperature detection device is above the second threshold, the third flow path loop is formed.

9. The thermal management system according to claim 2 or 3, characterized in that, The heat exchanger includes a radiator.

10. The thermal management system according to any one of claims 1 to 3, characterized in that, Also includes: An oil cooler is configured in the second flow path; and The fourth flow path is connected to the oil cooler and isolated from the second flow path. in, In the fourth flow path, the lubricating oil circulates. The driving device includes: The first device exchanges heat with the lubricating oil circulating in the fourth flow path; and The second device exchanges heat with the heat medium circulating in the second flow path.

11. A vehicle, characterized in that, The thermal management system is provided with any one of claims 1 to 3.

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