Thermal management system of tensioner, control method and tensioner

Abstract

The invention discloses a thermal management system of a tensioner, a control method and the tensioner, the tensioner comprises a rotary driving part and a battery module for supplying power to the rotary driving part, the thermal management system comprises a first cooling device and a refrigerant circulating device, the first cooling device comprises a first cooling water pump and a first cooling liquid circulating channel, and the second cooling water pump comprises a second cooling water pump and a second cooling liquid circulating channel; the first cooling water pump is used for pumping the cooling liquid in the first cooling liquid circulation channel to the battery module and heating or cooling according to the current temperature of the battery module; and the refrigerant circulating device is used for performing refrigerant circulating cooling on the battery module when the inlet temperature of the battery module is higher than a preset temperature. By means of the scheme, it can be guaranteed that the battery module works in a reasonable temperature environment, the service life of the battery module is prolonged, and the equipment reliability is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of tension machines, and specifically relates to a thermal management system, a control method and a tension machine of a tension machine. Background Art

[0002] Existing tension machines are usually driven by diesel engines, and the heat of the whole machine is cooled by the radiators corresponding to the power system and hydraulic system. In addition, during cooling, only the motor, inverter (or controller), etc. are usually cooled by conventional water cooling cycle, which is similar to the cooling method of conventional power systems. The battery system with higher temperature requirements is not controlled, and the normal operation of the battery and even the whole machine cannot be ensured, which may affect the service life of the battery and the equipment. Summary of the invention

[0003] The purpose of the present application is to provide a thermal management system, a control method and a tension machine to ensure that the battery module of the tension machine operates in a reasonable temperature environment, thereby extending the service life of the entire machine.

[0004] In order to achieve the above-mentioned object, the present application provides a thermal management system for a tension machine, the tension machine comprising a rotating drive member and a battery module for powering the rotating drive member, the thermal management system comprising:

[0005] a first cooling device, comprising a first cooling water pump and a first cooling liquid circulation channel, wherein the first cooling water pump is used to pump the cooling liquid in the first cooling liquid circulation channel to the battery module and heat or cool the battery module according to the current temperature of the battery module; and

[0006] A refrigerant circulation device is used to circulate the refrigerant to cool the battery module when the inlet temperature of the battery module is higher than a preset temperature.

[0007] In some embodiments, the refrigerant circulation device includes a compressor and a condenser. A heat exchanger is provided on the connecting pipeline between the compressor and the condenser. When the inlet temperature of the battery module is higher than a preset temperature, the compressor is used to circulate the refrigerant in the condenser to the battery module for refrigerant cooling.

[0008] In some embodiments, the thermal management system further comprises a second cooling device, wherein:

[0009] The second cooling device comprises a second cooling water pump and a second cooling liquid circulation channel, and the second cooling water pump is used to pump the cooling liquid in the second cooling liquid circulation channel to the rotating drive member for cooling;

[0010] or,

[0011] The second cooling device includes an air cooling component integrated on the rotating driving member, and the air cooling component is used to cool down the rotating driving member.

[0012] In some embodiments, a radiator is further provided on the second coolant circulation channel, and a first temperature detection element for detecting the coolant temperature is provided at both the inlet and outlet ends of the rotating drive element. The second cooling device also includes a first control unit electrically connected to the first temperature detection element, and the first control unit is used to control the start and stop of the rotating drive element according to the coolant temperature.

[0013] In some embodiments, the tension machine also includes an OBC charger, and the first cooling device also includes a multi-way proportional valve arranged on the first coolant circulation channel, one port of the multi-way proportional valve is connected to the first cooling water pump, and the other two ports are respectively connected to the battery module and the OBC charger.

[0014] In some embodiments, the battery module is integrated with a second temperature detection element for detecting the inlet temperature of the battery module, the first cooling device also includes the heat exchanger and a third temperature detection element for detecting the temperatures of the inlet and outlet ends of the first cooling water pump, and the heat exchanger is arranged on the first coolant circulation channel and located between the two third temperature detection elements.

[0015] A second aspect of the present application provides a thermal management control method for a tension machine, which is applied to the thermal management system as described above. The thermal management control method comprises the following steps:

[0016] Acquiring the current working status of the battery module and the rotating drive member;

[0017] The start and stop of the second cooling device, the first cooling water pump and the refrigerant circulation device are controlled according to the current working state.

[0018] In some embodiments, the step of controlling the start and stop of the second cooling device, the first cooling water pump, and the refrigerant circulation device according to the current working state includes:

[0019] When the battery module supplies power to the rotating drive member, controlling the second cooling device and the first cooling water pump to cool the rotating drive member and the battery module respectively;

[0020] When the battery module is being charged, the second cooling device is controlled to be turned off and the first cooling water pump is controlled to be turned on.

[0021] In some embodiments, when the battery module is charging, the step of controlling the second cooling device to be turned off and the first cooling water pump to be turned on further includes:

[0022] When the battery module is being charged, obtaining a current inlet temperature of the battery module in real time;

[0023] The refrigerant circulation device is controlled to be turned on or off according to the current inlet temperature.

[0024] In some embodiments, the step of controlling the refrigerant circulation device to be turned on or off according to the current inlet temperature includes:

[0025] When the current inlet temperature is lower than a first preset temperature, controlling the first cooling water pump to heat the battery module;

[0026] When the current inlet temperature is greater than a second preset temperature, controlling the refrigerant circulation device and the first cooling water pump to cool the battery module simultaneously;

[0027] When the current inlet temperature is between the first preset temperature and the second preset temperature, controlling the first cooling water pump to cool the battery module alone;

[0028] Wherein, the first preset temperature is lower than the second preset temperature.

[0029] In some embodiments, the thermal management control method further comprises the steps of:

[0030] When the battery module supplies power to the rotating drive member, obtaining a current inlet temperature of the battery module in real time;

[0031] When the current inlet temperature is greater than a second preset temperature, controlling the refrigerant circulation device, the second cooling device and the first cooling water pump to operate simultaneously;

[0032] When the current inlet temperature is between the first preset temperature and the second preset temperature, the second cooling device and the first cooling water pump are controlled to work simultaneously, and the refrigerant circulation device is turned off;

[0033] Wherein, the first preset temperature is lower than the second preset temperature.

[0034] In some embodiments, the thermal management control method further comprises the steps of:

[0035] Obtaining flow requirements of the battery module and the OBC charger;

[0036] The valve opening state of the proportional multi-way valve is controlled according to the flow demand.

[0037] A third aspect of the present application provides a tension machine, comprising the thermal management system as described above.

[0038] Through the above technical solution, by setting the first cooling device and the refrigerant circulation device in the thermal management system, the corresponding device is selected to cool the battery module according to the operating conditions of the battery module of the tension machine. Specifically, when the battery module is working, the coolant in the first coolant circulation channel is pumped to the battery module for heating or cooling through the first cooling water pump. In addition, when the battery module is working, when the inlet temperature of the battery module is higher than the preset temperature, the refrigerant circulation device is turned on to circulate the refrigerant to cool the battery module. The present application can ensure that the battery module can operate in a reasonable temperature environment by controlling the cooling or heating of the battery module in different working states of the battery module, thereby greatly improving the service life of the battery module, improving the reliability of the equipment, and reducing the equipment operation and maintenance costs.

[0039] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0041] Figure 1 This is a control principle block diagram of the thermal management system of the tension machine of this application;

[0042] Figure 2 This is a schematic diagram of the structure of the tension machine of this application.

[0043] Description of Reference Numerals

[0044] 11 Second cooling water pump 25 Third temperature detection element

[0045] 12 Radiator 30 Refrigerant circulation device

[0046] 13 first temperature detection element 31 compressor

[0047] 14 First control unit 32 Condenser

[0048] 15 Rotating drive 33 Fan

[0049] 20 first cooling device 34 air flow separator

[0050] 21 First cooling water pump 40 Heat exchanger

[0051] 22 Multi-way proportional valve 50 Master controller

[0052] 23 Battery Module 100 Thermal Management System

[0053] 24 OBC charger 60 tension wheel assembly DETAILED DESCRIPTION

[0054] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0055] The thermal management system 100 , control method and tension machine of the tension machine according to the present application are described below with reference to the accompanying drawings.

[0056] like Figure 1 As shown, the present application provides a thermal management system 100 of a tension machine, which can control the cooling of both the rotating drive component 15 and the battery module 23 of the tension machine. Specifically, the tension machine includes a rotating drive component 15 and a battery module 23 for powering the rotating drive component 15, wherein the rotating drive component 15 can be a driving motor, and the tension machine also includes a tension wheel 60 assembly, which is drivingly connected to the tension wheel 60 assembly to apply a rotational driving force to the tension wheel 60 assembly.

[0057] The thermal management system 100 of the present application includes a first cooling device 20 and a refrigerant circulation device 30; wherein the first cooling device 20 includes a first cooling water pump 21 and a first coolant circulation channel, the first cooling water pump 21 is used to pump the coolant in the first coolant circulation channel to the battery module 23, and heat or cool down the battery module 23 according to the current temperature; the refrigerant circulation device 30 is used to circulate the refrigerant to cool down the battery module 23 when the inlet temperature of the battery module 23 is higher than the preset temperature.

[0058] The present application also includes a second cooling device for cooling the rotating drive member.

[0059] In the first embodiment, the second cooling device includes a second cooling water pump 11 and a second coolant circulation channel. The second cooling water pump 11 is used to pump the coolant in the second coolant circulation channel to the rotating drive member 15 for cooling.

[0060] In the second embodiment, the second cooling device includes an air cooling component integrated on the rotating drive member 15, and the air cooling component is used to cool down the rotating drive member 15. The air cooling component can be a heat dissipation fan installed in the rotating drive member, and when the rotating drive member needs to be cooled down, the heat dissipation fan can be turned on.

[0061] When describing the cooling of the rotating drive member 15, the focus is on the example of the second cooling device being water cooling. Similarly, when the second cooling device is air cooling, the cooling is similar and will not be described in detail here.

[0062] In the present application, when the battery module 23 and the rotating drive member 15 are working at the same time, the coolant in the second coolant circulation channel is pumped to the rotating drive member 15 by the second cooling water pump 11 for cooling, and the first cooling water pump 21 pumps the coolant in the first coolant circulation channel to the battery module 23 for heating or cooling. In addition, when the battery module 23 is working, the inlet temperature of the battery module 23 is obtained in real time. When the inlet temperature of the battery module 23 is higher than the preset temperature, the refrigerant circulation device 30 is turned on to circulate the refrigerant to cool the battery module 23. The present application can control the cooling or heating of the battery module 23 in different working states of the battery module 23, and can ensure that the battery module 23 and the rotating drive member 15 are both operating in a reasonable temperature environment by controlling the battery module 23 with higher temperature requirements, thereby greatly improving the service life of the battery module 23 and the rotating drive member 15, improving the reliability of the equipment, and reducing the equipment operation and maintenance costs.

[0063] In some embodiments, the refrigerant circulation device 30 includes a compressor 31 and a condenser 32. A heat exchanger 40 is provided on the connecting pipeline between the compressor 31 and the condenser 32. When the inlet temperature of the battery module 23 is higher than the preset temperature, the compressor 31 is used to circulate the refrigerant in the condenser 32 to the battery module 23 for refrigerant cooling. When the refrigerant circulation device 30 is used to assist in cooling the battery module 23, the compressor 31 is started, and the temperature of the battery module 23 is quickly cooled by the refrigerant cooling of the condenser 32 to prevent the temperature from being too high and to increase the service life of the battery module 23.

[0064] In some embodiments, a radiator 12 is further provided on the second coolant circulation channel. During actual operation, when the second cooling water pump 11 is turned on, the second cooling water pump 11 pumps the coolant in the second coolant circulation channel to the drive motor, and then the coolant is dissipated and cooled through the radiator 12 to achieve cooling of the drive motor.

[0065] Furthermore, the inlet and outlet ends of the rotating drive member 15 are both provided with a first temperature detection member 13 for detecting the coolant temperature. The second cooling device 10 also includes a first control unit 14 electrically connected to the first temperature detection member 13. The first control unit 14 is used to control the start and stop of the rotating drive member according to the coolant temperature.

[0066] The first temperature detection member 13 may be a temperature sensor, which detects the coolant temperature at the inlet and outlet ends of the drive motor and sends corresponding temperature signals, thereby determining whether the drive motor has been turned on.

[0067] In some embodiments, the tension machine also includes an OBC charger 24, and the first cooling device 20 also includes a multi-way proportional valve 22 arranged on the first coolant circulation channel, one port of the multi-way proportional valve 22 is connected to the first cooling water pump 21, and the other two ports are respectively connected to the battery module 23 and the OBC charger 24.

[0068] Among them, the multi-way proportional valve 22 is preferably a proportional three-way valve. The present application uses the proportional three-way valve to control the flow of the battery module 23 and the OBC charger 24, which reduces the duplication of parts and components and improves the utilization rate of the whole machine. In the discharge and charging refrigeration mode of the battery module 23, the actual flow on the battery module 23 side and the OBC charger 24 side is allocated according to demand through the proportional three-way valve; and by using the proportional three-way valve to control the flow of the battery module 23 and the OBC charger 24, the circulation loop is reduced, making the thermal management system 100 more concise and practical.

[0069] In some embodiments, a second temperature detection element for detecting the inlet temperature of the battery module 23 is integrated on the battery module 23. The first cooling device 20 also includes a heat exchanger 40 and a third temperature detection element 25 for detecting the temperatures at the inlet and outlet ends of the first cooling water pump 21. The heat exchanger 40 is arranged on the first coolant circulation channel and is located between the two third temperature detection elements 25.

[0070] The heat exchanger 40 has two independent refrigerant channels and a coolant channel, so that the refrigerant channel cooperates with the condenser 32 and the compressor 31 to transport the refrigerant; the coolant channel cooperates with the first coolant circulation channel to transport the coolant used to cool the battery module 23. During the detection process, by detecting the two third temperature detection components 25 at the outlet and inlet ends of the first cooling water pump 21, the coolant temperature detected by the third temperature detection component 25 is used as a reference, and the temperature of the battery module 23 detected is used as the basis to determine whether the first cooling water pump 21 or the compressor 31 is turned on.

[0071] A second aspect of the present application provides a thermal management control method for a tension machine, which is applied to the thermal management system 100 as described above. The thermal management control method comprises the following steps:

[0072] Obtaining the current working status of the battery module 23 and the rotating drive member 15;

[0073] The start and stop of the second cooling water pump 11, the first cooling water pump 21 and the refrigerant circulation device 30 are controlled according to the current working state.

[0074] The present application controls the start and stop of the second cooling water pump 11, the first cooling water pump 21 and the refrigerant circulation device 30 according to the current working status of the battery module 23 and the rotating drive component 15, so that the battery module 23 and the rotating drive component 15 can be well temperature controlled regardless of the working status, thereby ensuring that the battery module 23 and the rotating drive component 15 are operating at a reasonable ambient temperature, thereby improving the environmental adaptability of the entire tension machine.

[0075] In some embodiments, the step of controlling the start and stop of the second cooling water pump 11, the first cooling water pump 21 and the refrigerant circulation device 30 according to the current working state includes:

[0076] When the battery module 23 supplies power to the rotating drive member 15, the second cooling water pump 11 and the first cooling water pump 21 are controlled to cool the rotating drive member 15 and the battery module 23 respectively;

[0077] When the battery module 23 is being charged, the second cooling water pump 11 is controlled to be turned off and the first cooling water pump 21 is controlled to be turned on.

[0078] In this embodiment, when the battery module 23 supplies power to the drive motor, the battery module 23 is in a discharging state and the drive motor is also working, so it is necessary to control the second cooling water pump 11 to turn on, and the coolant flows through the drive motor and passes through the radiator 12 to dissipate heat and cool down to prevent the drive motor from shutting down due to overheating; when the battery module 23 is charging, the drive motor is not working, so the second cooling water pump 11 is controlled to be closed, and the first cooling water pump 21 is turned on to circulate coolant to cool the battery module 23.

[0079] In the first embodiment, when the battery module 23 is charging, the step of controlling the second cooling water pump 11 to be turned off and the first cooling water pump 21 to be turned on further includes:

[0080] When the battery module 23 is being charged, obtaining the current inlet temperature of the battery module 23 in real time;

[0081] The refrigerant circulation device 30 is controlled to be turned on or off according to the current inlet temperature.

[0082] When the battery module 23 is charging, the battery module 23 does not supply power to the drive motor, that is, the drive motor is not working. Therefore, when the battery module 23 is charging, the second cooling water pump 11 is in a closed state, and the current inlet temperature of the battery module 23 determines whether the refrigerant circulation device 30 needs to be turned on to ensure that the entire battery module 23 operates at a reasonable ambient temperature, thereby greatly extending the service life of the battery module 23.

[0083] Furthermore, the step of controlling the refrigerant circulation device 30 to be turned on or off according to the current inlet temperature includes:

[0084] When the current inlet temperature is lower than the first preset temperature, the first cooling water pump 21 is controlled to heat the battery module 23;

[0085] When the current inlet temperature is greater than the second preset temperature, the refrigerant circulation device 30 and the first cooling water pump 21 are controlled to cool the battery module 23 simultaneously;

[0086] When the current inlet temperature is between the first preset temperature and the second preset temperature, the first cooling water pump 21 is controlled to cool down the battery module 23 alone;

[0087] Among them, the first preset temperature is lower than the second preset temperature, the first preset temperature is the lowest operating temperature setting value, and the second preset temperature is the high temperature setting value.

[0088] When the battery module 23 is being charged, when the temperature of the battery module 23 is greater than the high temperature setting value, the circulation cooling of the single first cooling water pump 21 can no longer meet the cooling demand, so the participation of the refrigerant circulation device 30 is required; at this time, the compressor 31 is started, so that the entire second cooling circulation device is in the cooling mode, and the battery module 23 is quickly cooled by refrigerant cooling to prevent the temperature from being too high, reduce the energy efficiency of the battery module 23, and even the battery module 23 is self-protected and shut down and stops working. When the temperature of the battery module 23 is less than the minimum operating temperature setting value, the refrigerant circulation device 30 is turned off, the first cooling water pump 21 is controlled to be turned on, and the temperature of the refrigerant is higher than the current inlet temperature of the battery module 23, thereby achieving heating of the battery module 23. In this embodiment, when the battery module 23 is being charged, the operation of the refrigerant circulation device 30 and the first cooling water pump 21 is controlled according to the current inlet temperature of the battery module 23, so as to ensure that the battery module 23 is within a suitable temperature range during the entire charging process, thereby ensuring the normal operation of the battery module 23.

[0089] In a second embodiment, the thermal management control method further comprises the steps of:

[0090] When the battery module 23 supplies power to the rotating drive member 15, the current inlet temperature of the battery module 23 is obtained in real time;

[0091] When the current inlet temperature is greater than the second preset temperature, the refrigerant circulation device 30, the second cooling water pump 11 and the first cooling water pump 21 are controlled to work simultaneously;

[0092] When the current inlet temperature is between the first preset temperature and the second preset temperature, the second cooling water pump 11 and the first cooling water pump 21 are controlled to work simultaneously, and the refrigerant circulation device 30 is turned off;

[0093] Among them, the first preset temperature is lower than the second preset temperature, the first preset temperature is the lowest operating temperature setting value, and the second preset temperature is the high temperature setting value.

[0094] When the battery module 23 is discharged, the battery module 23 supplies power to the drive motor. In this process, the current inlet temperature of the battery module 23 must also be obtained in real time. When the current inlet temperature of the battery module 23 is greater than the high temperature setting value, the second cooling water pump 11 is turned on, and the coolant flows through the drive motor and cools the drive motor through the radiator 12. At the same time, the first cooling water pump 21 and the refrigerant circulation device 30 are also turned on to cool the battery module 23 at the same time. When the current inlet temperature of the battery module 23 is between the high temperature setting value and the minimum operating temperature setting value, there is no need for an additional refrigerant circulation device 30 to enhance the cooling of the battery module 23. Therefore, it is only necessary to turn on the second cooling water pump 11 and the first cooling water pump 21 to cool the drive motor and the battery module 23 respectively, thereby ensuring the normal operation of the drive motor and the battery module.

[0095] Furthermore, the first preset temperature may preferably range from -10 to -20°C, and the specific value may be set according to actual needs; the second preset temperature may be set to about 25°C to 30°C.

[0096] In addition to the above-mentioned working modes, when the entire system is shut down, the entire thermal management system 100 stops operating, the second cooling water pump 11, the first cooling water pump 21, the compressor 31, and the fan 33 are all powered off and shut down, and the proportional three-way valve keeps the water circuit of the battery module 23 fully open, while the water circuit on the OBC charger 24 side is closed.

[0097] In some embodiments, the thermal management control method further comprises the steps of:

[0098] Obtaining the flow requirements of the battery module 23 and the OBC charger 24;

[0099] Control the valve opening state of the proportional multi-way valve according to the flow demand.

[0100] In the present application, when the battery module 23 is in discharge cooling mode and the OBC charger 24 is in charge cooling mode, the actual flow on the battery module 23 and the OBC charger 24 side can be controlled by the valve opening of the proportional three-way valve. The proportional three-way valve is used to control the flow of the battery module 23 and the OBC charger 24, thereby reducing the circulation loop and making the thermal management system 100 more concise and practical.

[0101] like Figure 2As shown, the third aspect of the present application provides a tension machine, including the thermal management system 100 as described above. Since the tension machine adopts all the embodiments of the thermal management system 100 described above, it has all the beneficial effects of the thermal management system 100 described above, which will not be described in detail here. In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0102] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0104] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A thermal management system for a tension machine, characterized in that: The tension machine comprises a rotary drive member (15) and a battery module (23) for supplying power to the rotary drive member (15), and the thermal management system (100) comprises: a first cooling device (20), comprising a first cooling water pump (21) and a first cooling liquid circulation channel, wherein the first cooling water pump (21) is used to pump the cooling liquid in the first cooling liquid circulation channel to the battery module (23), and perform heating or cooling according to the current temperature of the battery module (23); and A refrigerant circulation device (30) is used to circulate the refrigerant to cool the battery module (23) when the inlet temperature of the battery module (23) is higher than a preset temperature.

2. The thermal management system of the tension machine according to claim 1, characterized in that: The refrigerant circulation device (30) includes a compressor (31) and a condenser (32). A heat exchanger (40) is provided on the connecting pipeline between the compressor (31) and the condenser (32). When the inlet temperature of the battery module (23) is higher than a preset temperature, the compressor (31) is used to circulate the refrigerant in the condenser (32) to the battery module (23) for refrigerant cooling.

3. The thermal management system of the tension machine according to claim 1, characterized in that: The thermal management system (100) further comprises a second cooling device, wherein: The second cooling device comprises a second cooling water pump (11) and a second cooling liquid circulation channel, wherein the second cooling water pump (11) is used to pump the cooling liquid in the second cooling liquid circulation channel to the rotating drive member (15) for cooling. or, The second cooling device comprises an air cooling component integrated on the rotating drive member (15), and the air cooling component is used to cool down the rotating drive member (15).

4. The thermal management system of the tension machine according to claim 3, characterized in that: A radiator (12) is also provided on the second coolant circulation channel, and a first temperature detection element (13) for detecting the coolant temperature is provided at both the inlet and outlet ends of the rotary drive element (15). The second cooling device (10) further comprises a first control unit (14) electrically connected to the first temperature detection element (13), and the first control unit (14) is used to control the start and stop of the rotary drive element (15) according to the coolant temperature.

5. The thermal management system (100) of the tension machine according to claim 1, characterized in that: The tension machine also includes an OBC charger (24), and the first cooling device (20) also includes a multi-way proportional valve (22) arranged on the first coolant circulation channel, one port of the multi-way proportional valve (22) is connected to the first cooling water pump (21), and the other two ports are respectively connected to the battery module (23) and the OBC charger (24).

6. The thermal management system of the tension machine according to claim 2, characterized in that: The battery module (23) is integrated with a second temperature detection element for detecting the inlet temperature of the battery module (23); the first cooling device (20) further comprises the heat exchanger (40) and a third temperature detection element (25) for detecting the temperatures at the inlet and outlet ends of the first cooling water pump (21); the heat exchanger (40) is arranged on the first coolant circulation channel and is located between the two third temperature detection elements (25).

7. A thermal management control method for a tension machine, characterized in that: Applied in a thermal management system (100) according to any one of claims 1 to 6, the thermal management control method comprises the steps of: Acquiring the current working status of the battery module (23) and the rotating drive member (15); The start and stop of the second cooling device, the first cooling water pump (21) and the refrigerant circulation device (30) are controlled according to the current working state.

8. The thermal management control method of the tension machine according to claim 7, characterized in that: The step of controlling the start and stop of the second cooling device, the first cooling water pump (21) and the refrigerant circulation device (30) according to the current working state comprises: When the battery module (23) supplies power to the rotating drive member (15), the second cooling device and the first cooling water pump (21) are controlled to cool the rotating drive member (15) and the battery module (23) respectively; When the battery module (23) is being charged, the second cooling device is controlled to be turned off and the first cooling water pump (21) is controlled to be turned on.

9. The thermal management control method of the tension machine according to claim 8, characterized in that: The step of controlling the second cooling device to be turned off and the first cooling water pump (21) to be turned on when the battery module (23) is being charged further comprises: When the battery module (23) is being charged, obtaining the current inlet temperature of the battery module (23) in real time; The refrigerant circulation device (30) is controlled to be turned on or off according to the current inlet temperature.

10. The thermal management control method of the tension machine according to claim 8, characterized in that: The step of controlling the refrigerant circulation device (30) to be turned on or off according to the current inlet temperature comprises: When the current inlet temperature is lower than a first preset temperature, controlling the first cooling water pump (21) to heat the battery module (23); When the current inlet temperature is greater than a second preset temperature, controlling the refrigerant circulation device (30) and the first cooling water pump (21) to cool the battery module (23) simultaneously; When the current inlet temperature is between the first preset temperature and the second preset temperature, controlling the first cooling water pump (21) to cool the battery module (23) alone; Wherein, the first preset temperature is lower than the second preset temperature.

11. The thermal management control method of the tension machine according to claim 7, characterized in that: The thermal management control method further comprises the steps of: When the battery module (23) supplies power to the rotating drive member (15), a current inlet temperature of the battery module (23) is acquired in real time; When the current inlet temperature is greater than a second preset temperature, controlling the refrigerant circulation device (30), the second cooling device and the first cooling water pump (21) to operate simultaneously; When the current inlet temperature is between the first preset temperature and the second preset temperature, the second cooling device and the first cooling water pump (21) are controlled to operate simultaneously, and the refrigerant circulation device (30) is turned off; Wherein, the first preset temperature is lower than the second preset temperature.

12. The thermal management control method of a tension machine according to any one of claims 7 to 11, characterized in that: The thermal management control method further comprises the steps of: Obtaining flow requirements of the battery module (23) and the OBC charger (24); The valve opening state of the proportional multi-way valve is controlled according to the flow demand.

13. A tension machine, characterized in that: The thermal management system comprises a thermal management system (100) according to any one of claims 1 to 6.

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