Vehicle thermal management system and thermal management method

Abstract

The present disclosure provides a vehicle thermal management system and a thermal management method. The vehicle thermal management system comprises a battery cycle, a motor cycle, a first passage, a second passage, a third pump, and a temperature regulating device. The battery cycle comprises a first loop, and a first heat exchanger, a first pump, and a battery arranged in the first loop. The motor cycle comprises a second loop, and a second heat exchanger, a second pump, and a motor arranged in the second loop. The first passage is connected to the first loop and arranged in parallel with the first heat exchanger. The second passage is connected to the second loop and arranged in parallel with the second heat exchanger. The third pump is arranged in the second passage and is used to drive a medium in the second passage to flow. The temperature regulating device is connected to the first loop and the second passage and is used to regulate the temperature of a medium flowing to the battery so as to regulate the temperature of the battery. The vehicle thermal management system of the present disclosure is additionally provided with a dedicated temperature regulating device. The temperature regulating device can enhance the heat regulation performance for the battery, thereby avoiding the temperature of the battery being too high and heat dissipation being poor during use.

Description

Vehicle thermal management system and thermal management method

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to and the benefit of Chinese Patent Application No. 202411287680X, filed on September 13, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] Embodiments of the present disclosure relate to the technical field of vehicles, and in particular to a vehicle thermal management system and a thermal management method. BACKGROUND

[0004] In the prior art, the three-electricity systems of vehicles such as electric vehicles and electric bicycles are mostly cooled by air cooling or water cooling. These cooling methods cannot meet the needs of long-time high-power output, fast battery discharge (1C), and fast battery charging of high-performance vehicles, and there are poor heat dissipation in actual use, which also reduces the cycle life of the battery. SUMMARY

[0005] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, the present disclosure provides a vehicle thermal management system, which is additionally provided with a special temperature regulating device. The temperature regulating device can enhance the heat regulation performance of the battery, avoid the situation of excessive temperature of the battery in use and poor heat dissipation, improve the cycle life of the battery, and meet the needs of long-time high-power output, fast charging and discharging.

[0007] The present disclosure also provides a thermal management method based on the above vehicle thermal management system.

[0008] The vehicle thermal management system of the present disclosure comprises:

[0009] a battery cycle comprising a first loop and a first heat exchanger, a first pump and a battery arranged in the first loop, and a motor cycle comprising a second loop and a second heat exchanger, a second pump and a motor arranged in the second loop;

[0010] a first pipeline connected to the first loop and arranged in parallel with the first heat exchanger, and a second pipeline connected to the second loop and arranged in parallel with the second heat exchanger;

[0011] a third pump arranged in the second pipeline and used to drive the medium in the second pipeline to flow;

[0012] The temperature adjusting device is provided with a first channel and a second channel, the first channel is communicated with the first loop, the second channel is communicated with the second loop, and the temperature adjusting device is used for adjusting the temperature of the medium flowing to the battery in the first channel to control the temperature of the battery.

[0013] In some embodiments, the temperature adjusting device comprises:

[0014] A refrigeration sheet having a first side and a second side, one of the first side and the second side is used for refrigeration, and the other is used for heating;

[0015] A first heat exchange plate provided on the first side of the refrigeration sheet and communicated with the first loop, and the first channel is provided in the first heat exchange plate;

[0016] A second heat exchange plate provided on the second side of the refrigeration sheet and communicated with the second loop, and the second channel is provided in the second heat exchange plate.

[0017] In some embodiments, the refrigeration sheet is a semiconductor refrigeration sheet, and the first side and the second side are oppositely arranged.

[0018] In some embodiments, the refrigeration sheet and the second heat exchange plate are both provided with two, two refrigeration sheets are provided between two second heat exchange plates, the first heat exchange plate is provided between two refrigeration sheets, and two second heat exchange plates are communicated.

[0019] In some embodiments, a heat-conducting medium is provided between the refrigeration sheet and the first heat exchange plate, and between the refrigeration sheet and the second heat exchange plate.

[0020] In some embodiments, the temperature adjusting device comprises a shell, the refrigeration sheet, the first heat exchange plate, and the second heat exchange plate are all provided in the shell, and a buffer medium is provided between the first heat exchange plate and the shell and between the second heat exchange plate and the shell.

[0021] In some embodiments, the shell comprises a first shell and a second shell, the first shell covers the outer circumferential side of one of the second heat exchange plates, the second shell covers the outer circumferential side of the other second heat exchange plate, and the buffer medium is provided between the first shell and the second heat exchange plate and between the second shell and the second heat exchange plate.

[0022] And / or, the temperature adjusting device comprises a connecting pipe connected between two second heat exchange plates.

[0023] In some embodiments, the cooling sheet is arranged in a holder, and the holder is clamped and fixed between the first heat exchange plate and the second heat exchange plate.

[0024] And / or, a middle frame is arranged in the shell, and the cooling sheet, the first heat exchange plate, the second heat exchange plate are arranged in the middle frame.

[0025] In some embodiments, a valve is arranged at the connection between the first pipeline and the first loop, and the valve is used to switch the flow of the medium to the first pipeline or to the first heat exchanger.

[0026] And / or, the motor cycle includes an on-board charger, the on-board charger is arranged in the second loop, and the on-board charger is located between the second pump and the motor.

[0027] The heat management method based on the vehicle thermal management system in the embodiments of the present disclosure, wherein the first pump, the temperature regulating device, the battery, the first pipeline of the vehicle thermal management system form a first cycle, the first pump, the temperature regulating device, the battery, the first heat exchanger form a second cycle, and the third pump, the temperature regulating device, the second heat exchanger form a third cycle.

[0028] In some embodiments, the heat management method includes a low-temperature heating mode, a general cooling mode, an auxiliary cooling mode, and a main refrigeration mode.

[0029] If the temperature of the battery is lower than a first threshold value, the low-temperature heating mode is started, and if the temperature of the battery is higher than a second threshold value and lower than a third threshold value, the low-temperature heating mode is stopped.

[0030] If the temperature of the battery is higher than the third threshold value and lower than a fourth threshold value, the general cooling mode is started.

[0031] If the temperature of the battery is higher than the fourth threshold value and lower than a fifth threshold value, the auxiliary cooling mode is started.

[0032] If the temperature of the battery is higher than the fifth threshold value, the main refrigeration mode is started.

[0033] And the first threshold value < the second threshold value < the third threshold value < the fourth threshold value < the fifth threshold value.

[0034] In some embodiments, the low-temperature heating mode includes the following steps:

[0035] When the temperature of the battery is lower than the first threshold value, the temperature regulating device is started and the battery is heated by the first cycle, and the medium output by the cold end of the temperature regulating device is circulated by the third cycle.

[0036] When the temperature of the battery is not less than the second threshold value and is lower than the third threshold value, the temperature regulating device and the third pump are turned off, and then the second circulation is started.

[0037] In some embodiments, the normal cooling mode comprises the following steps: when the temperature of the battery is higher than the third threshold value and is lower than the fourth threshold value, the temperature regulating device is turned off, the second circulation is used to cool the battery, and the third circulation is used to circulate the medium output by the hot end of the temperature regulating device.

[0038] In some embodiments, the auxiliary cooling mode comprises the following steps: when the temperature of the battery is higher than the fourth threshold value and is lower than the fifth threshold value, the temperature regulating device is started, the second circulation is used to cool the battery, and the third circulation is used to circulate the medium output by the hot end of the temperature regulating device.

[0039] In some embodiments, the main refrigeration mode comprises the following steps: when the temperature of the battery is higher than the fifth threshold value, the temperature regulating device is started, the first circulation is used to cool the battery, and the third circulation is used to circulate the medium output by the hot end of the temperature regulating device.

[0040] Beneficial effects: The vehicle thermal management system and the thermal management method of the embodiments of the present disclosure add a special temperature regulating device, which can enhance the heat regulation performance of the battery, avoid the situation of excessive temperature of the battery in use and poor heat dissipation, improve the cycle service life of the battery, and meet the needs of long-time high-power output and rapid charging and discharging. BRIEF DESCRIPTION OF DRAWINGS

[0041] FIG. 1 is a schematic diagram of the overall structure of the vehicle thermal management system of the embodiments of the present disclosure.

[0042] FIG. 2 is a schematic diagram of the temperature regulating device in FIG. 1.

[0043] FIG. 3 is a schematic diagram of the temperature regulating device in FIG. 1.

[0044] Reference signs: 1-battery cycle; 11-first loop; 12-first heat exchanger; 13-first pump; 14-battery; 2-motor cycle; 21-second loop; 22-second heat exchanger; 23-second pump; 24-motor; 25-vehicle charger; 3-first pipeline; 4-second pipeline; 5-third pump; 6-temperature regulating device; 61-refrigeration sheet; 62-first heat exchange plate; 63-second heat exchange plate; 64-housing; 641-first shell; 642-second shell; 65-buffer medium; 66-connection pipe; 67-retaining frame; 68-middle frame; 7-valve. DETAILED DESCRIPTION

[0045] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0046] As shown in FIG. 1, the vehicle thermal management system of the embodiment of the present disclosure comprises a battery circulation 1, a motor circulation 2, a first pipeline 3, a second pipeline 4, a third pump 5 and a temperature regulating device 6. It should be noted that the vehicle thermal management system of the embodiment of the present disclosure can be applied to electric vehicles, electric bicycles and other two-wheeled vehicles, and can also be applied to cars, SUVs and other vehicles.

[0047] The battery circulation 1 comprises a first loop 11 and a first heat exchanger 12, a first pump 13 and a battery 14 arranged in the first loop 11. For example, as shown in FIG. 1, the first loop 11 can be regarded as a ring-shaped pipeline composed of pipes, the first heat exchanger 12 can be a radiator, the first pump 13 can be a water pump, and the battery 14 can be a power battery of the vehicle, which can be a lithium battery, a storage battery and the like.

[0048] As shown in FIG. 1, the first heat exchanger 12, the first pump 13 and the battery 14 can be connected to the first loop 11. In use, under the drive of the first pump 13, water and other temperature regulating media can circulate along the first loop 11, and the first heat exchanger 12 can realize heat exchange between the media and the outside, thereby meeting the use needs of adjusting the working temperature of the battery 14.

[0049] The motor circulation 2 comprises a second loop 21 and a second heat exchanger 22, a second pump 23 and a motor 24 arranged in the second loop 21. As shown in FIG. 1, the second loop 21 can also be regarded as a ring-shaped pipeline composed of pipes, the second heat exchanger 22 can also be a radiator, the second pump 23 can be a water pump and the like, and the motor 24 can be a power motor 24 of the vehicle, which can realize driving of the wheels, thereby meeting the driving needs of driving.

[0050] The second heat exchanger 22, the second pump 23 and the motor 24 can be connected to the second loop 21. In use, under the drive of the second pump 23, water and other temperature regulating media can circulate along the second loop 21, and the second heat exchanger 22 can realize heat exchange between the media and the outside, thereby meeting the use needs of adjusting the working temperature of the motor 24.

[0051] The first pipeline 3 is connected to the first loop 11 and arranged in parallel with the first heat exchanger 12. For example, as shown in FIG. 1, the first pipeline 3 can be regarded as a section of pipe, the first pipeline 3 can be arranged in the first loop 11, one end of the first pipeline 3 can be connected to the first loop 11 at the inlet of the first heat exchanger 12, and the other end of the first pipeline 3 can be connected to the first loop 11 at the outlet of the first heat exchanger 12.

[0052] In use, the medium can flow along the first pipeline 3 or the first heat exchanger 12, and the first pipeline 3 can function to short-circuit the first heat exchanger 12.

[0053] The second pipeline 4 is connected with the second loop 21 and arranged in parallel with the second heat exchanger 22. For example, as shown in FIG. 1, the second pipeline 4 can also be regarded as a section of pipeline, one end of the second pipeline 4 can be connected in communication with the second loop 21 at the outlet of the second heat exchanger 22, and the other end of the second pipeline 4 can be connected in communication with the second loop 21 at the inlet of the second heat exchanger 22.

[0054] The third pump 5 is arranged in the second pipeline 4 and used to drive the medium in the second pipeline 4 to flow, for example, the third pump 5 can also be a water pump or the like, and the third pump 5 can be arranged adjacent to the inlet end of the second pipeline 4. The third pump 5 meets the use requirement of driving the medium to flow along the second pipeline 4.

[0055] The temperature adjusting device 6 is connected with the first loop 11 and the second pipeline 4, and the temperature adjusting device 6 is used to adjust the temperature of the medium flowing to the battery 14 to regulate the temperature of the battery 14. For example, as shown in FIG. 1, two independent first channels and second channels can be arranged in the temperature adjusting device 6, wherein the first channels can be connected in series with the first loop 11, and the second channels can be connected in series with the second pipeline 4.

[0056] Secondly, the refrigeration and heating module can be arranged in the temperature adjusting device 6, and the refrigeration and heating module can realize the refrigeration function and the heating function under the condition of being powered on or the like, thereby meeting the use requirement of heating or refrigerating in the first channels.

[0057] The vehicle thermal management system of the embodiment of the present disclosure is provided with the temperature adjusting device 6 on the basis of arranging the first heat exchanger 12 and the second heat exchanger 22, the temperature adjusting device 6 can realize the autonomous heating and cooling of the medium, and the operating power of the temperature adjusting device 6 can be adaptively adjusted according to the requirement of the temperature adjusting device 6, thereby fully ensuring the heating and cooling effect of the battery 14, enhancing the heat regulation performance of the battery 14, avoiding the case that the temperature of the battery 14 is too high and the poor heat dissipation in use, improving the cycle service life of the battery 14, and meeting the use requirement of long-time high-power output and rapid charging and discharging.

[0058] Secondly, the first pipeline 3 can short-circuit the first heat exchanger 12, and in the case that the ambient temperature is too high, the first pipeline 3 can realize the circulation of the medium, thereby avoiding the case that the medium cannot achieve a good refrigeration effect due to the heat exchange with the outside when passing through the first heat exchanger 12, and improving the refrigeration efficiency.

[0059] In addition, the second pipeline 4 can provide a pipeline for the delivery of the medium of another channel of the temperature adjusting medium, and when the output is the medium with higher temperature, heat exchange with the external environment can be achieved through the second heat exchanger 22, thereby achieving the cooling of the medium, achieving the sharing of the second heat exchanger 22, simplifying the overall number of parts, and reducing the cost.

[0060] In some embodiments, as shown in FIG. 2, the temperature adjusting device 6 includes a refrigeration sheet 61, a first heat exchange plate 62 and a second heat exchange plate 63. The refrigeration sheet 61 has a first side and a second side, one of which is used for refrigeration and the other of which is used for heating. For example, the refrigeration sheet 61 can be a semiconductor refrigeration sheet 61, the first side can be the top side of the refrigeration sheet 61, and the second side can be the bottom side of the refrigeration sheet 61. In use, heat can be concentrated on the first side, and at this time, the second side is at a lower temperature. In other embodiments, heat can also be concentrated on the second side, and at this time, the first side is at a lower temperature.

[0061] The first heat exchange plate 62 is arranged on the first side of the refrigeration sheet 61 and communicates with the first loop 11. As shown in FIG. 2, the first heat exchange plate 62 can be a flat plate, and a flow channel for the flow of medium can be arranged in the first heat exchange plate 62, and the flow channel can communicate with the first loop 11 and form the first channel. The first heat exchange plate 62 can be directly attached to the first side of the refrigeration plate, thereby meeting the use requirement of heat exchange between the medium in the flow channel and the first side of the refrigeration plate.

[0062] The second heat exchange plate 63 is arranged on the second side of the refrigeration sheet 61 and communicates with the second pipeline 4. As shown in FIG. 2, the second heat exchange plate 63 can also be a flat plate, and a flow channel for the flow of medium can also be arranged in the second heat exchange plate 63, and the flow channel can communicate with the second pipeline 4 and form the second channel. The second heat exchange plate 63 can be directly attached to the second side of the refrigeration plate, thereby meeting the use requirement of heat exchange between the medium in the flow channel and the second side of the refrigeration plate.

[0063] In some embodiments, the first side and the second side are arranged opposite to each other. For example, the first side and the second side can be arranged opposite to each other in the up-down direction, and in other embodiments, when other types of temperature adjusting devices 6 are used, the first side and the second side can also be two adjacent sides, thereby improving the flexibility and variability of the arrangement.

[0064] In some embodiments, the refrigeration sheet 61 and the second heat exchange plate 63 are both provided with two, as shown in FIG. 2, the temperature adjusting device 6 as a whole can be a sandwich structure, two refrigeration sheets 61 are arranged between two second heat exchange plates 63, and a first heat exchange plate 62 is arranged between two refrigeration sheets 61. And the two second heat exchange plates 63 are connected in communication.

[0065] In use, the first sides of the two refrigeration sheets 61 can simultaneously heat or cool the medium in the first heat exchange plate 62, and the second sides of the two refrigeration sheets 61 can respectively heat or cool the medium in the two second heat exchange plates 63, wherein the medium in the first heat exchange plate 62 after being adjusted in temperature can be directly delivered into the first loop 11, and the medium in the two second heat exchange plates 63 after being adjusted in temperature can be delivered into the second loop 4.

[0066] Therefore, by additionally arranging the refrigeration sheets 61 and the second heat exchange plates 63, the temperature adjustment efficiency can be improved, thereby fully meeting the use requirement of high-efficiency temperature adjustment of the battery 14.

[0067] In some embodiments, a heat-conducting medium is arranged between the refrigeration sheet 61 and the first heat exchange plate 62 and between the refrigeration sheet 61 and the second heat exchange plate 63. For example, the heat-conducting medium can be heat-conducting silica gel, two refrigeration sheets 61 can be arranged, the first heat exchange plate 62 is arranged between the two refrigeration sheets 61, and heat-conducting silica gel can be applied between the upper and lower sides of the first heat exchange plate 62 and the two refrigeration sheets 61. The outer sides of the two refrigeration sheets 61 can be respectively attached with a second heat exchange plate 63, and heat-conducting silica gel can also be applied between each refrigeration sheet 61 and the corresponding second heat exchange plate 63.

[0068] The arrangement of the heat-conducting medium can not only fix the refrigeration sheet 61 with the first heat exchange plate 62 or the second heat exchange plate 63, thereby ensuring the structural stability, but also enhance the heat exchange efficiency between the refrigeration sheet 61 and the first heat exchange plate 62 and the second heat exchange plate 63, thereby improving the temperature adjustment effect on the battery 14.

[0069] In some embodiments, as shown in FIG. 2, the temperature adjustment device 6 includes a shell 64, which can be a box-shaped structure, and the refrigeration sheet 61, the first heat exchange plate 62, and the second heat exchange plate 63 are arranged in the shell 64, thereby achieving the effects of structural protection and integration of the bulk components.

[0070] A buffer medium 65 is arranged between the first heat exchange plate 62 and the shell 64 and between the second heat exchange plate 63 and the shell 64. As shown in FIG. 2, the buffer medium 65 can be rubber, silica gel, or the like, and the arrangement of the buffer medium 65 can improve the impact resistance of the temperature adjustment device 6.

[0071] In some embodiments, the shell 64 includes a first shell 641 and a second shell 642, as shown in FIG. 3, both of which can be box-shaped structures, wherein the first shell 641 covers the outer circumferential side of one second heat exchange plate 63, the second shell 642 covers the outer circumferential side of the other second heat exchange plate 63, and the buffer medium 65 is arranged between the first shell 641 and the second heat exchange plate 63 and between the second shell 642 and the second heat exchange plate 63.

[0072] The split structure of the shell 64 is convenient for processing and production, and also convenient for installation and subsequent disassembly.

[0073] In some embodiments, the temperature regulating device 6 comprises a connecting pipe 66 connected between two second heat exchange plates 63. For example, as shown in FIG. 3, the connecting pipe 66 can be a U-shaped pipe, which can be arranged on the right side of the two second heat exchange plates 63 and can connect the two second heat exchange plates 63, so that the flow channels in the two second heat exchange plates 63 are connected as a whole, facilitating the circulation of the medium.

[0074] In some embodiments, as shown in FIG. 3, the vehicle thermal management system comprises a holder 67, which can be made of plastic or the like. The refrigeration fin 61 is arranged in the holder 67, and the holder 67 is clamped and fixed between the first heat exchange plate 62 and the second heat exchange plate 63. The holder can limit and fix the parts of the refrigeration fin 61, thereby ensuring the stability of the overall structure.

[0075] In some embodiments, as shown in FIG. 3, the vehicle thermal management system comprises a middle frame 68, which is arranged in the shell 64, and the refrigeration fin 61, the first heat exchange plate 62 and the second heat exchange plate 63 are arranged in the middle frame 68. The middle frame 68 can act as a skeleton, thereby ensuring the stability of the overall structure of the temperature regulating device 6.

[0076] In some embodiments, the vehicle thermal management system comprises a valve 7 arranged at the connection between the first pipeline 3 and the first loop 11, and the valve 7 is used to switch the flow of the medium to the first pipeline 3 or to the first heat exchanger 12.

[0077] For example, as shown in FIG. 1, the valve 7 can be a three-position two-way electromagnetic valve, which has one inlet and two outlets. The inlet can be connected to the first loop 11, one outlet can be connected to the inlet of the first heat exchanger 12, and the other outlet can be connected to the first pipeline 3. During use, the two outlets can be opened and closed respectively, thereby realizing the switching of the first heat exchanger 12 and the first pipeline 3.

[0078] [Corrected according to Rule 91 on 21.07.2025] In some embodiments, as shown in FIG. 1, the motor circulation 2 comprises an on-board charger 25 (OBC), which is arranged in the second loop 21 and located between the second pump 23 and the motor 24.

[0079] The thermal management method of the embodiments of the present disclosure is described below.

[0080] It should be noted that the heat management method of the embodiments of the present disclosure is implemented based on the vehicle heat management system described above, and as shown in FIG. 1, the first pump 13, the temperature regulating device 6, the battery 14, and the first pipeline 3 of the vehicle heat management system form a first circulation. The first circulation is a circulation of the first pump 13→ the temperature regulating device 6→ the battery 14→ the valve 7→ the first pipeline 3→ the first pump 13.

[0081] The first pump 13, the temperature regulating device 6, the battery 14, and the first heat exchanger 12 form a second circulation. The second circulation is a circulation of the first pump 13→ the temperature regulating device 6→ the battery 14→ the valve 7→ the first heat exchanger 12→ the first pump 13.

[0082] The third pump 5, the temperature regulating device 6, and the second heat exchanger 22 form a third circulation. The third circulation is a circulation of the third pump 5→ the temperature regulating device 6→ the second heat exchanger 22→ the third pump 5.

[0083] In some embodiments, the heat management method mainly includes a low-temperature heating mode, a normal cooling mode, an auxiliary cooling mode, a main refrigeration mode, and the like.

[0084] If the temperature of the battery 14 is lower than a first threshold value, the low-temperature heating mode is started, and if the temperature of the battery is higher than a second threshold value and lower than a third threshold value, the low-temperature heating mode is stopped.

[0085] If the temperature of the battery 14 is higher than the third threshold value and lower than a fourth threshold value, the normal cooling mode is started.

[0086] If the temperature of the battery 14 is higher than the fourth threshold value and lower than a fifth threshold value, the auxiliary cooling mode is started.

[0087] If the temperature of the battery 14 is higher than the fifth threshold value, the main refrigeration mode is started.

[0088] And the first threshold value < the second threshold value < the third threshold value < the fourth threshold value < the fifth threshold value.

[0089] In some embodiments, when in the low-temperature heating mode, the heat management method can mainly include the following steps:

[0090] When the temperature of the battery 14 is lower than the first threshold value, the temperature regulating device 6 is started and the battery 14 is heated by the first circulation, and the medium output by the cold end of the temperature regulating device 6 is circulated and transported by the third circulation; when the temperature of the battery 14 is not less than the second threshold value and lower than the third threshold value, the temperature regulating device 6 and the third pump 5 are stopped, and then the second circulation is started.

[0091] Specifically, when the temperature of the battery 14 is lower than a temperature T1 (T1 < 0 °C), where the temperature T1 can be regarded as a first threshold value, the temperature regulating device 6 can start the heating mode, at which the first pump 13 and the third pump 5 are started to work, and the valve 7 is switched to the first circulation (the small circulation water circuit in FIG. 1), so that the battery 14 can be heated.

[0092] It should be noted that when the temperature regulating device 6 starts the heating mode, the medium in the first heat exchange plate 62 can be heated, so as to meet the use requirement of delivering the medium with a higher temperature to the first loop 11 and the battery 14. The medium in the second heat exchange plate 63 can be refrigerated, and the refrigerated medium can be delivered to the second heat exchanger 22 along the second loop 4 and the partial second loop 21, so that the medium with a lower temperature can be exchanged with the outside heat at the second heat exchanger 22, so as to avoid the case that the medium with a lower temperature directly flows to the motor 24.

[0093] When the temperature of the battery 14 is ≥ T2 (T2 > 0 °C), where the temperature T2 can be regarded as a second threshold value, the temperature regulating device 6, the first pump 13 and the third pump 5 are stopped to work, and the valve 7 is switched to the second circulation (the large circulation water circuit).

[0094] In some embodiments, when in the normal cooling mode, the thermal management method can mainly include the following steps:

[0095] When the temperature of the battery 14 is higher than a third threshold value and lower than a fourth threshold value, the temperature regulating device 6 is turned off, the second circulation is used to cool the battery 14, and the third circulation is used to circulate the medium output by the hot end of the temperature regulating device 6.

[0096] For example, when the temperature of the battery 14 is higher than a temperature T3 (T3 > T2), where the temperature T3 can be regarded as a third threshold value, the first pump 13 is started to work, and the valve 7 can be switched to the second circulation under the control of a controller or the like, at which the temperature regulating device 6 is not worked, and the fan at the first heat exchanger 12 is started, so that the temperature of the medium can be cooled by air cooling through the first heat exchanger 12.

[0097] In some embodiments, when in the auxiliary cooling mode, the thermal management method can mainly include the following steps:

[0098] When the temperature of the battery 14 is higher than a fourth threshold value and lower than a fifth threshold value, the temperature regulating device 6 is started, the second circulation is used to cool the battery 14, and the third circulation is used to circulate the medium output by the hot end of the temperature regulating device 6.

[0099] For example, when the temperature of the battery 14 is higher than a temperature T4 (T4 > T3), where the temperature T4 can be regarded as a fourth threshold value, the temperature control device 6 starts the refrigeration mode, and it is to be noted that, in actual operation, the input power of the temperature control device 6 can be adjusted by PWM control according to the temperature rising rate of the battery 14, that is, in the auxiliary cooling mode, the temperature control device 6 is in a low-power working state, at this time, the first pump 13 and the third pump 5 are started to work, and the valve 7 is switched to the second circulation, so that the auxiliary cooling of the battery 14 can be realized.

[0100] It is to be noted that, when the temperature control device 6 starts the refrigeration mode, the medium in the above-mentioned first heat exchange plate 62 can be refrigerated, so as to meet the use requirement of delivering the medium with low temperature to the first loop 11 and the battery 14. The medium in the above-mentioned second heat exchange plate 63 can be heated, and the heated medium can be delivered to the second heat exchanger 22 along the second pipe 4 and part of the second loop 21, and at the second heat exchanger 22, the medium with high temperature can be exchanged with the outside to be cooled, so as to avoid the case that the medium with high temperature directly flows to the motor 24.

[0101] In some embodiments, when in the main refrigeration mode, the thermal management method can mainly include the following steps:

[0102] When the temperature of the battery 14 is higher than a fifth threshold value, the temperature control device 6 is started to cool the battery 14 by the first circulation, and the medium output by the hot end of the temperature control device 6 is circulated and delivered by the third circulation.

[0103] For example, in an extreme environment, when the temperature of the battery 14 is higher than a temperature T5 (T5 is greater than the allowable temperature of the battery 14), where the temperature T5 can be regarded as a fifth threshold value, at this time, the first heat exchanger 12 and the fan thereof cannot play a role in cooling and dissipating heat of the battery 14, and on the contrary, due to the excessively high external temperature, the battery 14 can be heated.

[0104] At this time, the temperature control device 6 starts the main refrigeration mode, in which the semiconductor refrigeration module works at a high power by PWM control, at this time, the first pump 13 and the third pump 5 are started to work, and the valve 7 is switched to the first circulation, so that the cooling of the battery 14 can be realized, and the over-temperature of the battery 14 is ensured.

[0105] In some embodiments, in actual operation, the motor circulation 2 can be continuously operated, that is, the second pump 23, the on-board charger 25, the motor 24 and the second heat exchanger 22 also form a circulation loop, that is, the circulation loop is the circulation of the second pump 23→the on-board charger 25→the motor 24→the second heat exchanger 22→the second pump 23, so as to meet the use requirement of temperature control of the motor 24.

[0106] The thermal management method of the embodiments of the present disclosure has the following beneficial effects:

[0107] 1. The front-end temperature regulating device of the cooling water inlet of the battery cooling circuit, the temperature regulating device is a semiconductor refrigeration / heating module (TEC module), according to the battery temperature, the temperature regulating device can cool or heat the cooling liquid before entering the power battery, thereby improving the temperature regulating efficiency.

[0108] 2. The battery circuit has a large and small circulating waterway (first circulation and second circulation), according to the battery and environmental temperature, through the control of the two-way three-way electromagnetic valve (valve), the efficient battery thermal management is met.

[0109] 3. The temperature regulating device is connected to the motor circuit (motor circulation), and shares the motor radiator assembly (second heat exchanger) for heat dissipation, which can reduce the number of components, is conducive to the vehicle layout and saves the cost.

[0110] 4. The temperature regulating device adopts a sandwich structure, the overall product has the advantages of light structure weight, small size, low cost and high reliability, PWM closed-loop control can be used in control, which can effectively improve the system efficiency of the temperature regulating device and save energy consumption.

[0111] In the description of the present disclosure, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0112] In addition, the terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0113] In the present disclosure, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", and the like, should be understood broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0114] In the present disclosure, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0115] In the present disclosure, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0116] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present disclosure, and the changes, modifications, replacements and variations of the above embodiments made by those skilled in the art are within the protection scope of the present disclosure.

Claims

1. A vehicle thermal management system, characterized by, The application relates to a battery and motor circulation system, which comprises: a battery circulation system and a motor circulation system, the battery circulation system comprising a first loop and a first heat exchanger, a first pump and a battery arranged in the first loop, the motor circulation system comprising a second loop and a second heat exchanger, a second pump and a motor arranged in the second loop; a first pipeline and a second pipeline, the first pipeline being connected with the first loop and being arranged in parallel with the first heat exchanger, the second pipeline being connected with the second loop and being arranged in parallel with the second heat exchanger; a third pump arranged in the second pipeline and used for driving the medium in the second pipeline to flow; a temperature adjusting device provided with a first channel and a second channel, the first channel being communicated with the first loop, the second channel being communicated with the second pipeline, and the temperature adjusting device being used for adjusting the temperature of the medium flowing to the battery in the first channel so as to control the temperature of the battery. The temperature adjusting device comprises: a refrigeration sheet having a first side and a second side, one of the first side and the second side being used for refrigeration, and the other being used for heating; a first heat exchange plate arranged on the first side of the refrigeration sheet and communicated with the first loop, the first channel being arranged in the first heat exchange plate; and a second heat exchange plate arranged on the second side of the refrigeration sheet and communicated with the second pipeline, the second channel being arranged in the second heat exchange plate. The refrigeration sheet is a semiconductor refrigeration sheet, and the first side and the second side are arranged oppositely. The refrigeration sheet and the second heat exchange plate are both provided with two, the two refrigeration sheets are arranged between the two second heat exchange plates, the first heat exchange plate is arranged between the two refrigeration sheets, and the two second heat exchange plates are communicated. The refrigeration sheet and the first heat exchange plate, and the refrigeration sheet and the second heat exchange plate are both provided with a heat conducting medium.

2. The vehicle thermal management system of claim 1, wherein, The temperature adjusting device comprises a shell, the refrigeration sheet, the first heat exchange plate and the second heat exchange plate are all arranged in the shell, and the first heat exchange plate and the shell, and the second heat exchange plate and the shell are both provided with a buffer medium. The shell comprises a first shell and a second shell, the first shell is wrapped on the outer circumferential side of one of the second heat exchange plates, the second shell is wrapped on the outer circumferential side of the other second heat exchange plate, and the buffer medium is arranged between the first shell and the second heat exchange plate and between the second shell and the second heat exchange plate. The temperature adjusting device comprises a connecting pipe connected between the two second heat exchange plates. The application further relates to a battery and motor circulation system, which comprises a holding frame, the refrigeration sheet is arranged in the holding frame, and the holding frame is clamped and fixed between the first heat exchange plate and the second heat exchange plate.

3. The vehicle thermal management system of claim 2, wherein, The application further relates to a battery and motor circulation system, which comprises a valve arranged at the connection between the first pipeline and the first loop, and the valve is used for switching the flow of the medium to the first pipeline or to the first heat exchanger.

4. The vehicle thermal management system of claim 2 or 3, wherein, The application further relates to a battery and motor circulation system, which comprises a middle frame arranged in the shell, and the refrigeration sheet, the first heat exchange plate and the second heat exchange plate are all arranged in the middle frame.

5. The vehicle thermal management system of claim 4, wherein, ​ 6. The vehicle thermal management system of claim 4 or 5, wherein, ​ 7. The vehicle thermal management system of claim 6, wherein, ​ ​ 8. The vehicle thermal management system of claim 6 or 7, characterized in that, ​ ​ 9. The vehicle thermal management system of any one of claims 1-8, wherein, ​ And / or, the motor cycle comprises an on-board charger, the on-board charger is arranged in the second loop, and the on-board charger is located between the second pump and the motor.

10. A thermal management method including the vehicle thermal management system according to any one of claims 1 to 9, characterized by, The first pump, the temperature regulating device, the battery, and the first pipeline form a first cycle, the first pump, the temperature regulating device, the battery, and the first heat exchanger form a second cycle, and the third pump, the temperature regulating device, and the second heat exchanger form a third cycle.

11. The thermal management method of claim 10, wherein, The thermal management method comprises a low-temperature heating mode, a normal cooling mode, an auxiliary cooling mode, and a main refrigeration mode. If the temperature of the battery is lower than a first threshold value, the low-temperature heating mode is started; if the temperature of the battery is higher than a second threshold value and lower than a third threshold value, the low-temperature heating mode is stopped. If the temperature of the battery is higher than the third threshold value and lower than a fourth threshold value, the normal cooling mode is started. If the temperature of the battery is higher than the fourth threshold value and lower than a fifth threshold value, the auxiliary cooling mode is started. If the temperature of the battery is higher than the fifth threshold value, the main refrigeration mode is started. And the first threshold value < the second threshold value < the third threshold value < the fourth threshold value < the fifth threshold value.

12. The thermal management method of claim 11, wherein, The low-temperature heating mode comprises the following steps: When the temperature of the battery is lower than the first threshold value, the temperature regulating device is started, the battery is heated by the first cycle, and the medium output by the cold end of the temperature regulating device is circulated by the third cycle. When the temperature of the battery is not lower than the second threshold value and lower than the third threshold value, the temperature regulating device and the third pump are stopped, and then the second cycle is started.

13. The thermal management method of claim 11 or 12, wherein, The normal cooling mode comprises the following steps: when the temperature of the battery is higher than the third threshold value and lower than the fourth threshold value, the temperature regulating device is stopped, the battery is cooled by the second cycle, and the medium output by the hot end of the temperature regulating device is circulated by the third cycle.

14. The thermal management method of any one of claims 11 to 13, wherein, The auxiliary cooling mode comprises the following steps: when the temperature of the battery is higher than the fourth threshold value and lower than the fifth threshold value, the temperature regulating device is started, the battery is cooled by the second cycle, and the medium output by the hot end of the temperature regulating device is circulated by the third cycle.

15. The thermal management method of any one of claims 11 to 14, wherein, The main refrigeration mode comprises the following steps: When the temperature of the battery is higher than the fifth threshold value, the temperature regulating device is started, the battery is cooled by the first cycle, and the medium output by the hot end of the temperature regulating device is circulated by the third cycle.

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