Thermal management system and method of use thereof

Abstract

The invention relates to the technical field of thermal management, in particular to a thermal management system and a using method thereof. The thermal management system is applied to electric engineering machinery and electronic equipment, and is used for controlling motor heat dissipation equipment to work when a target motor and driving equipment thereof work so as to reduce the temperature of the target motor. The electronic equipment is further used for obtaining the current temperature of the surrounding environment of a target battery in the electric engineering machine, obtaining the cooling liquid temperature corresponding to the cooling liquid of the radiator and the current motor temperature corresponding to the target motor, and obtaining the temperature of the target battery according to the current temperature of the surrounding environment of the target battery and / or the cooling liquid temperature. And controlling the battery heat dissipation system according to the current motor temperature and / or the current motor temperature corresponding to the target motor. The temperature of the target battery can be prevented from being too high, the current temperature of the surrounding environment of the target battery can be accurately adjusted, then normal operation of the target battery is guaranteed, normal operation of the electric engineering machine is guaranteed, and then the service life of the electric engineering machine can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a thermal management system and a method of using the same. Background Art

[0002] Electric forklifts are mainly powered by lithium batteries. The suitable operating temperature range of lithium batteries is 15℃-45℃. At present, the main cooling method for electric forklift batteries is natural cooling, which has extremely low cooling efficiency and is affected by the ambient temperature. It cannot meet the thermal management requirements of forklift batteries at high temperatures.

[0003] Especially when the battery is charged at a high rate, it is very easy to overheat in a high temperature environment. In order to ensure battery safety and extend battery life, the charging rate can only be reduced, which will extend the charging time and affect customer use. Similarly, lithium batteries cannot be charged in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the forklift. The battery needs to be heated to a suitable temperature.

[0004] Therefore, how to perform thermal management on electric forklifts has become an urgent problem to be solved. Summary of the invention

[0005] In view of this, the present invention provides a thermal management system and a method of using the same to solve the problem of how to perform thermal management on an electric forklift.

[0006] In a first aspect, the present invention provides a thermal management system, which is applied to electric engineering machinery. The thermal management system includes: a battery cooling system, a motor cooling device, a radiator, and an electronic device, wherein the battery cooling system and the motor cooling device are both connected to the radiator, the radiator contains coolant, and the electronic device is communicatively connected to the battery cooling system and the motor cooling device, wherein:

[0007] An electronic device, used for controlling the operation of the motor heat dissipation device when the target motor and its driving device are working, so as to reduce the temperature of the target motor;

[0008] The electronic device is also used to obtain the current temperature of the environment surrounding the target battery in the electric engineering machinery, and obtain the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor, and control the battery cooling system according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

[0009] The thermal management system provided by the embodiment of the present application includes: a battery cooling system, a motor cooling device, a radiator and an electronic device, wherein the battery cooling system and the motor cooling device are both connected to the radiator, the radiator contains coolant, and the electronic device is connected to the battery cooling system and the motor cooling device in communication. When the target motor of the electronic device and its driving device are working, the motor cooling device is controlled to work to reduce the temperature of the target motor, thereby avoiding a sudden increase in temperature during the operation of the target motor. In addition, the electronic device obtains the current temperature of the surrounding environment of the target battery in the electric engineering machinery, and obtains the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor. According to the current temperature of the surrounding environment of the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor, the battery cooling system is controlled, so that the current temperature of the surrounding environment of the target battery can be adjusted according to the control of the battery cooling system. Thereby, the temperature of the target battery can be avoided to be too high, and the thermal management requirements of the electric engineering machinery battery at high temperature can be met, and the target battery can be avoided to be unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the electric engineering machinery. Therefore, the thermal management system can accurately adjust the current temperature of the environment around the target battery, thereby ensuring the normal operation of the target battery and the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0010] In an optional embodiment, the battery cooling system includes a battery water pump and a battery cooling pipe, wherein a first end of the battery water pump is connected to a second end of the radiator, a second end of the battery water pump is connected to a first end of the battery cooling pipe, and a second end of the battery cooling pipe is connected to a second end of the radiator, wherein:

[0011] The electronic device is used to obtain a preset operating temperature range corresponding to the target battery, compare the current temperature with the maximum temperature and the minimum temperature in the preset operating temperature range; and control the battery water pump according to the comparison result.

[0012] The thermal management system provided in the embodiment of the present application, the battery heat dissipation system includes a battery water pump and a battery cooling pipe, wherein the first end of the battery water pump is connected to the second end of the radiator, the second end of the battery water pump is connected to the first end of the battery cooling pipe, and the second end of the battery cooling pipe is connected to the second end of the radiator. The electronic device obtains the preset operating temperature range corresponding to the target battery, compares the current temperature with the maximum temperature and the minimum temperature in the preset operating temperature range; and controls the battery water pump according to the comparison result. Thus, the current temperature of the surrounding environment of the target battery can be adjusted. Thus, it can be avoided that the temperature of the target battery is too high and cannot meet the thermal management requirements of the electric engineering machinery battery at high temperature. In addition, it can also avoid that the target battery cannot be charged in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0013] In an optional embodiment, the electronic device is used to control the battery water pump to operate if the current temperature is greater than the maximum temperature;

[0014] The battery water pump is used to drive the coolant in the radiator to circulate in the battery cooling pipe to reduce the current temperature of the environment around the target battery.

[0015] In the thermal management system provided in the embodiment of the present application, if the current temperature is greater than the maximum temperature, the electronic device controls the battery water pump to operate; the battery water pump drives the coolant in the radiator to circulate in the battery cooling pipe to reduce the current temperature of the environment surrounding the target battery, thereby avoiding the electric engineering machinery being unable to meet the thermal management requirements at high temperatures.

[0016] In an optional embodiment, the electronic device is further used to control the battery water pump to operate if the current temperature is less than the minimum temperature;

[0017] The battery water pump is used to drive the coolant in the radiator to circulate in the battery cooling pipe to increase the current temperature of the environment around the target battery.

[0018] In the thermal management system provided in the embodiment of the present application, if the current temperature is lower than the minimum temperature, the electronic device controls the battery water pump to operate; the battery water pump drives the coolant in the radiator to circulate in the battery cooling pipe to increase the current temperature of the target battery's surroundings. This can prevent the target battery from being unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the target battery's surroundings, thereby ensuring the normal operation of the target battery and the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0019] In an optional implementation, the thermal management system further includes a cooling fan, which is communicatively connected to the electronic device, wherein:

[0020] The electronic device is further used for, if the current temperature is greater than the maximum temperature, subtracting the maximum temperature from the current temperature to obtain a first difference between the current temperature and the maximum temperature; if the first difference is greater than a first preset difference, and / or the coolant temperature is greater than a first coolant temperature threshold, and / or the current motor temperature is greater than a first preset motor temperature, controlling the cooling fan to operate;

[0021] If the first difference is smaller than the second preset difference, and the coolant temperature is smaller than the second coolant temperature threshold, and the current motor temperature is smaller than the second preset motor temperature, the cooling fan is controlled to stop working; wherein, the second preset difference is smaller than the first preset difference, the second coolant temperature threshold is smaller than the first coolant temperature threshold, and the second preset motor temperature is smaller than the first preset motor temperature.

[0022] The thermal management system provided in the embodiment of the present application further includes a heat dissipation fan, which is connected to the electronic device in communication. If the current temperature is greater than the maximum temperature, the electronic device uses the current temperature to subtract the maximum temperature to obtain the first difference between the current temperature and the maximum temperature, thereby ensuring the accuracy of the calculated first difference. If the first difference is greater than the first preset difference, and / or the coolant temperature is greater than the first coolant temperature threshold, and / or the current motor temperature is greater than the first preset motor temperature, the heat dissipation fan is controlled to work. Thus, it can be ensured that when the current temperature of the surrounding environment of the target battery is high, the current temperature of the surrounding environment of the target battery can be quickly cooled, thereby ensuring the normal operation of the target battery. In addition, if the first difference is less than the second preset difference, and the coolant temperature is less than the second coolant temperature threshold, and the current motor temperature is less than the second preset motor temperature, the heat dissipation fan is controlled to stop working; wherein, the second preset difference is less than the first preset difference, the second coolant temperature threshold is less than the first coolant temperature threshold, and the second preset motor temperature is less than the first preset motor temperature, thereby avoiding the heat dissipation fan from working for a long time, resulting in a waste of resources.

[0023] In an optional embodiment, the thermal management system further includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device is communicatively connected to the air conditioning device, wherein:

[0024] The electronic device is further used to control the air conditioning device to start the cooling mode if the first difference is greater than a third preset difference, and / or the coolant temperature is greater than a third coolant temperature threshold; wherein the third preset difference is greater than the first preset difference; and the third coolant temperature threshold is greater than the first coolant temperature threshold;

[0025] Air conditioning equipment, used to start cooling mode under the control of electronic equipment;

[0026] Heat exchangers are used to reduce the temperature of the coolant in the battery cooling ducts.

[0027] The thermal management system provided in the embodiment of the present application also includes an air-conditioning system, wherein the air-conditioning system includes an air-conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air-conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device and the air-conditioning device are communicatively connected. If the first difference is greater than the third preset difference, and / or the coolant temperature is greater than the third coolant temperature threshold, the air-conditioning device is controlled to turn on the cooling mode. The air-conditioning device turns on the cooling mode under the control of the electronic device. The heat exchanger reduces the temperature of the coolant in the battery cooling pipe. Thereby, it can be ensured that when the current temperature of the environment surrounding the target battery is high, the current temperature of the environment surrounding the target battery can be quickly cooled down, thereby ensuring the normal operation of the target battery.

[0028] In an optional embodiment, the thermal management system further includes a heater, which is mounted on the battery cooling pipe, wherein the electronic device is communicatively connected to the heater, wherein:

[0029] The electronic device also subtracts the current temperature from the minimum temperature to obtain a second difference between the current temperature and the minimum temperature if the current temperature is lower than the minimum temperature; and controls the heater to heat the coolant in the battery cooling pipe if the second difference is greater than a fourth preset difference.

[0030] The thermal management system provided in the embodiment of the present application further includes a heater, which is installed on the battery cooling pipe, and the electronic device is connected to the heater for communication. If the current temperature is less than the minimum temperature, the electronic device uses the minimum temperature to subtract the current temperature to obtain the second difference between the current temperature and the minimum temperature, thereby ensuring the accuracy of the calculated second difference. If the second difference is greater than the fourth preset difference, the heater is controlled to heat the coolant in the battery cooling pipe, so that when the ambient temperature of the target battery is low, the surrounding environment can be quickly heated up, thereby preventing the target battery from being unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0031] In an optional embodiment, the thermal management system further includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device is communicatively connected to the air conditioning device, wherein:

[0032] The electronic device is further used to control the air conditioning device to start a heating mode if the second difference is greater than a fifth preset difference; the fifth preset difference is greater than the fourth preset difference;

[0033] Air conditioning equipment, used to start heating mode under the control of electronic equipment;

[0034] The heat exchanger is used to transfer heat to the battery cooling duct to increase the temperature of the coolant in the battery cooling duct.

[0035] The thermal management system provided in the embodiment of the present application also includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device and the air conditioning device are connected in communication. If the second difference is greater than the fifth preset difference, the electronic device controls the air conditioning device to turn on the heating mode. Under the control of the electronic device, the air conditioning device turns on the cooling mode. The heat exchanger transfers heat to the battery cooling pipe to increase the temperature of the coolant in the battery cooling pipe. In this way, when the ambient temperature of the target battery is low, the surrounding environment can be quickly heated up, thereby avoiding the target battery from being unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0036] In an optional embodiment, the motor heat dissipation device includes: a motor water pump and a motor cooling pipeline, wherein: a first end of the motor water pump is connected to a second end of the radiator, a second end of the motor water pump is connected to a first end of the motor cooling pipeline, and a second end of the motor cooling pipeline is connected to a second end of the battery cooling pipeline, wherein: the target motor includes at least one of a drive motor and an oil pump motor; wherein:

[0037] The electronic device is used to control the operation of the motor water pump when the target motor and its driving device are working, so as to reduce the temperature of the target motor.

[0038] The thermal management system provided in the embodiment of the present application, the motor heat dissipation device includes: a motor water pump and a motor cooling pipe, wherein: the first end of the motor water pump is connected to the second end of the radiator, the second end of the motor water pump is connected to the first end of the motor cooling pipe, and the second end of the motor cooling pipe is connected to the second end of the battery cooling pipe, wherein: the target motor includes at least one of a drive motor and an oil pump motor. When the target motor of the electronic device and its drive device are working, the motor water pump is controlled to work to reduce the temperature of the target motor, thereby avoiding the target motor from being overheated, and further ensuring the normal operation of the electric engineering machinery.

[0039] In a second aspect, the present invention provides a method for using a thermal management system, which is applied to the thermal management system of the first aspect or any corresponding embodiment thereof, and the method comprises:

[0040] When the target motor and its driving device are working, the motor heat dissipation device is controlled to work so as to reduce the temperature of the target motor;

[0041] The current temperature of the environment surrounding the target battery in the electric engineering machinery is obtained, and the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor are obtained, and the battery cooling system is controlled according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

[0042] The method for using the thermal management system provided in the embodiment of the present application is that when the target motor and its driving device are working, the motor heat dissipation device is controlled to work to reduce the temperature of the target motor, thereby avoiding a sudden increase in temperature during the operation of the target motor. The current temperature of the surrounding environment of the target battery in the electric engineering machinery is obtained, and the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor are obtained. According to the current temperature of the surrounding environment of the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor, the battery heat dissipation system is controlled, so that the current temperature of the surrounding environment of the target battery can be adjusted. Thereby, the temperature of the target battery can be avoided to be too high, and the thermal management requirements of the electric engineering machinery battery at high temperature can be avoided, and the target battery can be avoided to be unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal method can realize accurate adjustment of the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0044] Figure 1 is a schematic structural diagram of a first thermal management system according to an embodiment of the present invention;

[0045] Figure 2 is a schematic structural diagram of a second thermal management system according to an embodiment of the present invention;

[0046] Figure 3 is a schematic structural diagram of a third thermal management system according to an embodiment of the present invention;

[0047] Figure 4 is a schematic structural diagram of a fourth thermal management system according to an embodiment of the present invention;

[0048] Figure 5 is a schematic structural diagram of a fifth thermal management system according to an embodiment of the present invention;

[0049] Figure 6 is a schematic structural diagram of a sixth thermal management system according to an embodiment of the present invention;

[0050] Figure 74 is a flow chart of a method for using a thermal management system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0052] Electric forklifts are mainly powered by lithium batteries. The suitable operating temperature range of lithium batteries is 15℃-45℃. At present, the main cooling method for electric forklift batteries is natural cooling, which has extremely low cooling efficiency and is affected by the ambient temperature. It cannot meet the thermal management requirements of forklift batteries at high temperatures.

[0053] Especially when the battery is charged at a high rate, it is very easy to overheat in a high temperature environment. In order to ensure battery safety and extend battery life, the charging rate can only be reduced, which will extend the charging time and affect customer use. Similarly, lithium batteries cannot be charged in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the forklift. The battery needs to be heated to a suitable temperature.

[0054] Therefore, how to perform thermal management on electric forklifts has become an urgent problem to be solved.

[0055] The present application embodiment provides a thermal management system, which is applied to electric engineering machinery. Figure 1 As shown, the thermal management system includes: a battery cooling system, a motor cooling device, a radiator and an electronic device, wherein the battery cooling system and the motor cooling device are both connected to the radiator, the radiator contains coolant, and the electronic device is communicatively connected with the battery cooling system and the motor cooling device, wherein:

[0056] An electronic device, used for controlling the operation of the motor heat dissipation device when the target motor and its driving device are working, so as to reduce the temperature of the target motor;

[0057] The electronic device is also used to obtain the current temperature of the environment surrounding the target battery in the electric engineering machinery, and obtain the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor, and control the battery cooling system according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

[0058] Specifically, the electronic device can monitor the working status of the target motor and its driving device. When it is detected that the target motor and its driving device are working, the electronic device can control the motor heat dissipation device to work, thereby reducing the temperature of the target motor.

[0059] In addition, the electronic device can also obtain the current temperature of the target battery surrounding environment transmitted by the temperature sensor through the communication connection with the temperature sensor around the target battery in the electric engineering machinery. The electronic device can also detect the coolant temperature corresponding to the coolant in the radiator through the temperature sensor installed in the radiator. The electronic device can also detect the current motor temperature corresponding to the target motor based on the temperature sensor installed in the target motor.

[0060] Then, the electronic device controls the battery cooling system according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

[0061] The thermal management system provided by the embodiment of the present application includes: a battery cooling system, a motor cooling device, a radiator and an electronic device, wherein the battery cooling system and the motor cooling device are both connected to the radiator, the radiator contains coolant, and the electronic device is connected to the battery cooling system and the motor cooling device in communication. When the target motor of the electronic device and its driving device are working, the motor cooling device is controlled to work to reduce the temperature of the target motor, thereby avoiding a sudden increase in temperature during the operation of the target motor. In addition, the electronic device obtains the current temperature of the surrounding environment of the target battery in the electric engineering machinery, and obtains the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor. According to the current temperature of the surrounding environment of the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor, the battery cooling system is controlled, so that the current temperature of the surrounding environment of the target battery can be adjusted according to the control of the battery cooling system. Thereby, the temperature of the target battery can be avoided to be too high, and the thermal management requirements of the electric engineering machinery battery at high temperature can be met, and the target battery can be avoided to be unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the electric engineering machinery. Therefore, the thermal management system can accurately adjust the current temperature of the environment around the target battery, thereby ensuring the normal operation of the target battery and the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0062] In an optional embodiment of the present application, Figure 2 As shown, the battery cooling system includes a battery water pump and a battery cooling pipe, wherein a first end of the battery water pump is connected to a second end of the radiator, a second end of the battery water pump is connected to a first end of the battery cooling pipe, and a second end of the battery cooling pipe is connected to a second end of the radiator, wherein:

[0063] The electronic device is used to obtain a preset operating temperature range corresponding to the target battery, compare the current temperature with the maximum temperature and the minimum temperature in the preset operating temperature range; and control the battery water pump according to the comparison result.

[0064] Optionally, an electronic device, used to control the battery water pump to operate if the current temperature is greater than the maximum temperature;

[0065] The battery water pump is used to drive the coolant in the radiator to circulate in the battery cooling pipe to reduce the current temperature of the environment around the target battery.

[0066] Optionally, the electronic device is further used to control the battery water pump to operate if the current temperature is less than the minimum temperature;

[0067] The battery water pump is used to drive the coolant in the radiator to circulate in the battery cooling pipe to increase the current temperature of the environment around the target battery.

[0068] Specifically, the electronic device may receive the preset operating temperature range corresponding to the target battery input by the user, or may receive the preset operating temperature range corresponding to the target battery sent by other devices. The electronic device may also set the preset operating temperature range corresponding to the target battery according to the attribute information of the target battery. The embodiment of the present application does not specifically limit the manner in which the electronic device obtains the preset operating temperature range corresponding to the target battery.

[0069] Then, the electronic device compares the current temperature with the maximum temperature and the minimum temperature in the preset operating temperature range; based on the comparison result, the battery water pump is controlled.

[0070] If the current temperature is greater than the maximum temperature, the electronic device determines that the current temperature is high, and therefore, the electronic device controls the battery water pump to operate.

[0071] When the battery water pump is working, it drives the coolant in the radiator to circulate in the battery cooling pipe to reduce the current temperature of the environment around the target battery.

[0072] If the current temperature is lower than the minimum temperature, the electronic device determines that the current temperature is low, and therefore, the electronic device controls the battery water pump to operate.

[0073] When the battery water pump is working, it drives the coolant in the radiator to circulate in the battery cooling pipe to increase the current temperature of the environment around the target battery.

[0074] If the current temperature is greater than or equal to the minimum temperature and less than or equal to the maximum temperature, the electronic device determines that the current temperature is suitable, and therefore controls the battery water pump not to operate.

[0075] The thermal management system provided in the embodiment of the present application, the battery heat dissipation system includes a battery water pump and a battery cooling pipe, wherein the first end of the battery water pump is connected to the second end of the radiator, the second end of the battery water pump is connected to the first end of the battery cooling pipe, and the second end of the battery cooling pipe is connected to the second end of the radiator. The electronic device obtains the preset operating temperature range corresponding to the target battery, compares the current temperature with the maximum temperature and the minimum temperature in the preset operating temperature range; and controls the battery water pump according to the comparison result. Thus, the current temperature of the surrounding environment of the target battery can be adjusted. Thus, it can be avoided that the temperature of the target battery is too high and cannot meet the thermal management requirements of the electric engineering machinery battery at high temperature. In addition, it can also avoid that the target battery cannot be charged in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0076] If the current temperature is greater than the maximum temperature, the electronic device controls the battery water pump to operate; the battery water pump drives the coolant in the radiator to circulate in the battery cooling pipe to reduce the current temperature of the environment surrounding the target battery, thereby avoiding the electric construction machinery being unable to meet the thermal management requirements at high temperatures.

[0077] If the current temperature is lower than the minimum temperature, the electronic device controls the battery water pump to work; the battery water pump drives the coolant in the radiator to circulate in the battery cooling pipe to increase the current temperature of the target battery's surroundings. This can prevent the target battery from being unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the target battery's surroundings, thereby ensuring the normal operation of the target battery and the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0078] In an optional embodiment of the present application, as Figure 3 As shown, the thermal management system also includes a cooling fan, which is communicatively connected with the electronic device, wherein:

[0079] The electronic device is further used for, if the current temperature is greater than the maximum temperature, subtracting the maximum temperature from the current temperature to obtain a first difference between the current temperature and the maximum temperature; if the first difference is greater than a first preset difference, and / or the coolant temperature is greater than a first coolant temperature threshold, and / or the current motor temperature is greater than a first preset motor temperature, controlling the cooling fan to operate;

[0080] If the first difference is smaller than the second preset difference, the coolant temperature is smaller than the second coolant temperature threshold, and the current motor temperature is smaller than the second preset motor temperature, the cooling fan is controlled to stop working.

[0081] Among them, the second preset difference is smaller than the first preset difference, the second coolant temperature threshold is smaller than the first coolant temperature threshold, and the second preset motor temperature is smaller than the first preset motor temperature.

[0082] Specifically, if the current temperature is greater than the maximum temperature, the electronic device may subtract the maximum temperature from the current temperature to obtain a first difference between the current temperature and the maximum temperature.

[0083] Optionally, the electronic device may receive a first preset difference, a first coolant temperature threshold, and a first preset motor temperature input by a user, or may receive a first preset difference, a first coolant temperature threshold, and a first preset motor temperature sent by other devices, or may set the first preset difference according to the attribute information of the target battery, set the first coolant temperature threshold according to the type of coolant, and set the first preset motor temperature according to the attribute information of the target motor. The embodiment of the present application does not specifically limit the manner in which the electronic device obtains the first preset difference, the first coolant temperature threshold, and the first preset motor temperature.

[0084] Then, the electronic device compares the first difference with the first preset difference, compares the coolant temperature with the first coolant temperature threshold, and compares the current motor temperature with the first preset motor temperature.

[0085] If the first difference is greater than the first preset difference, and / or the coolant temperature is greater than the first coolant temperature threshold, and / or the current motor temperature is greater than the first preset motor temperature, the electronic device controls the cooling fan to operate.

[0086] Optionally, the electronic device may receive a second preset difference, a second coolant temperature threshold, and a second preset motor temperature input by a user, or may receive a second preset difference, a second coolant temperature threshold, and a second preset motor temperature sent by other devices, or may set a second preset difference according to the attribute information of the target battery, set a second coolant temperature threshold according to the type of coolant, and set a second preset motor temperature according to the attribute information of the target motor. The embodiment of the present application does not specifically limit the manner in which the electronic device obtains the second preset difference, the second coolant temperature threshold, and the second preset motor temperature.

[0087] After controlling the cooling fan to work, the electronic device can compare the first difference with the second preset difference, compare the coolant temperature with the second coolant temperature threshold, and compare the current motor temperature with the second preset motor temperature in real time.

[0088] If the first difference is smaller than the second preset difference, the coolant temperature is smaller than the second coolant temperature threshold, and the current motor temperature is smaller than the second preset motor temperature, the cooling fan is controlled to stop working.

[0089] The thermal management system provided in the embodiment of the present application further includes a heat dissipation fan, which is connected to the electronic device in communication. If the current temperature is greater than the maximum temperature, the electronic device uses the current temperature to subtract the maximum temperature to obtain the first difference between the current temperature and the maximum temperature, thereby ensuring the accuracy of the calculated first difference. If the first difference is greater than the first preset difference, and / or the coolant temperature is greater than the first coolant temperature threshold, and / or the current motor temperature is greater than the first preset motor temperature, the heat dissipation fan is controlled to work. Thus, it can be ensured that when the current temperature of the surrounding environment of the target battery is high, the current temperature of the surrounding environment of the target battery can be quickly cooled, thereby ensuring the normal operation of the target battery. In addition, if the first difference is less than the second preset difference, and the coolant temperature is less than the second coolant temperature threshold, and the current motor temperature is less than the second preset motor temperature, the heat dissipation fan is controlled to stop working; wherein, the second preset difference is less than the first preset difference, the second coolant temperature threshold is less than the first coolant temperature threshold, and the second preset motor temperature is less than the first preset motor temperature, thereby avoiding the heat dissipation fan from working for a long time, resulting in a waste of resources.

[0090] In an optional embodiment of the present application, Figure 4 As shown, the thermal management system also includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device and the air conditioning device are connected in communication, wherein,

[0091] The electronic device is further used to control the air conditioning device to start the cooling mode if the first difference is greater than a third preset difference, and / or the coolant temperature is greater than a third coolant temperature threshold; wherein the third preset difference is greater than the first preset difference; and the third coolant temperature threshold is greater than the first coolant temperature threshold;

[0092] Air conditioning equipment, used to start cooling mode under the control of electronic equipment;

[0093] Heat exchangers are used to reduce the temperature of the coolant in the battery cooling ducts.

[0094] Specifically, the electronic device may receive a third preset difference and a third coolant temperature threshold input by a user, or may receive a third preset difference and a third coolant temperature threshold sent by other devices, or may set a third preset difference according to attribute information of a target battery, and set a third coolant temperature threshold according to the type of coolant. The embodiment of the present application does not specifically limit the manner in which the electronic device obtains the third preset difference and the third coolant temperature threshold.

[0095] Then, the electronic device may compare the first difference with the third preset difference, and compare the coolant temperature with the third coolant temperature threshold.

[0096] If the first difference is greater than the third preset difference, and / or the coolant temperature is greater than the third coolant temperature threshold, the electronic device controls the air conditioning device to start the cooling mode. The air conditioning device starts the cooling mode under the control of the electronic device. The heat exchanger transfers the cold air generated by the air conditioning device to the battery cooling pipe, thereby reducing the temperature of the coolant in the battery cooling pipe.

[0097] Optionally, the electronic device may receive the sixth preset difference and the fourth coolant temperature threshold input by the user, or may receive the sixth preset difference and the fourth coolant temperature threshold sent by other devices, or may set the sixth preset difference according to the attribute information of the target battery, and set the fourth coolant temperature threshold according to the type of coolant. The embodiment of the present application does not specifically limit the manner in which the electronic device obtains the sixth preset difference and the fourth coolant temperature threshold.

[0098] After controlling the air conditioning device to start the cooling mode, the electronic device can compare the first difference with the sixth preset difference in real time, and compare the coolant temperature with the fourth coolant temperature threshold.

[0099] If the first difference is greater than the sixth preset difference, and / or the coolant temperature is greater than the fourth coolant temperature threshold, the electronic device controls the air conditioning device to turn off or on the cooling mode.

[0100] In an optional implementation of the present application, the electronic device can obtain the working environment temperature corresponding to the electric engineering machinery. When the working environment temperature is lower than a first preset temperature threshold, the electronic device can control the air-conditioning system to lock, thereby prohibiting the air-conditioning system from operating.

[0101] When the working environment temperature is higher than or equal to the first preset temperature threshold, the air conditioning system of the electronic device can be controlled to unlock, thereby controlling the air conditioning system to work accurately.

[0102] Exemplarily, the first preset temperature threshold may be 35° C. or 36° C. The embodiment of the present application does not specifically limit the first preset temperature threshold.

[0103] The thermal management system provided in the embodiment of the present application also includes an air-conditioning system, wherein the air-conditioning system includes an air-conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air-conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device and the air-conditioning device are communicatively connected. If the first difference is greater than the third preset difference, and / or the coolant temperature is greater than the third coolant temperature threshold, the air-conditioning device is controlled to turn on the cooling mode. The air-conditioning device turns on the cooling mode under the control of the electronic device. The heat exchanger reduces the temperature of the coolant in the battery cooling pipe. Thereby, it can be ensured that when the current temperature of the environment surrounding the target battery is high, the current temperature of the environment surrounding the target battery can be quickly cooled down, thereby ensuring the normal operation of the target battery.

[0104] In an optional embodiment of the present application, Figure 5 As shown, the thermal management system also includes a heater, which is installed on the battery cooling pipe, wherein the electronic device is communicatively connected with the heater, wherein:

[0105] The electronic device also subtracts the current temperature from the minimum temperature to obtain a second difference between the current temperature and the minimum temperature if the current temperature is lower than the minimum temperature; and controls the heater to heat the coolant in the battery cooling pipe if the second difference is greater than a fourth preset difference.

[0106] Specifically, if the current temperature is lower than the minimum temperature, the electronic device may subtract the current temperature from the minimum temperature to obtain a second difference between the current temperature and the minimum temperature.

[0107] Optionally, the electronic device may receive the fourth preset difference value input by the user, or may receive the fourth preset difference value sent by other devices, or may set the fourth preset difference value according to the property information of the target battery. The implementation of this application does not specifically limit the way in which the electronic device obtains the fourth preset difference value.

[0108] Then, the electronic device compares the second difference with the fourth preset difference. If the second difference is greater than the fourth preset difference, the electronic device determines that the current temperature is low, and therefore, the electronic device controls the heater to heat the coolant in the battery cooling channel.

[0109] In an optional implementation of the present application, the electronic device can obtain the working environment temperature corresponding to the electric engineering machinery. When the working environment temperature is higher than a second preset temperature threshold, the electronic device can control the heater to be locked, thereby prohibiting the heater from working.

[0110] When the working environment temperature is lower than or equal to the second preset temperature threshold, the heater of the electronic device can be controlled to be unlocked, thereby controlling the heater to work accurately.

[0111] Exemplarily, the second preset temperature threshold may be -10°C or -15°C. The embodiment of the present application does not specifically limit the second preset temperature threshold.

[0112] The thermal management system provided in the embodiment of the present application further includes a heater, which is installed on the battery cooling pipe, and the electronic device is connected to the heater for communication. If the current temperature is less than the minimum temperature, the electronic device uses the minimum temperature to subtract the current temperature to obtain the second difference between the current temperature and the minimum temperature, thereby ensuring the accuracy of the calculated second difference. If the second difference is greater than the fourth preset difference, the heater is controlled to heat the coolant in the battery cooling pipe, so that when the ambient temperature of the target battery is low, the surrounding environment can be quickly heated up, thereby preventing the target battery from being unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0113] In an optional embodiment of the present application, as Figure 4 As shown, the thermal management system also includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device and the air conditioning device are connected in communication, wherein,

[0114] The electronic device is further used to control the air conditioning device to start a heating mode if the second difference is greater than a fifth preset difference; the fifth preset difference is greater than the fourth preset difference;

[0115] Air conditioning equipment, used to start heating mode under the control of electronic equipment;

[0116] The heat exchanger is used to transfer heat to the battery cooling duct to increase the temperature of the coolant in the battery cooling duct.

[0117] Specifically, the electronic device may receive the fifth preset difference value input by the user, or may receive the fifth preset difference value sent by other devices, or may set the fifth preset difference value according to the property information of the target battery. The embodiment of the present application does not specifically limit the way in which the electronic device obtains the fifth preset difference value.

[0118] Then, the electronic device may compare the second difference with the fifth preset difference. If the second difference is greater than the fifth preset difference, the electronic device controls the air conditioning device to start the heating mode. Under the control of the electronic device, the air conditioning device starts the heating mode. The heat exchanger transfers heat to the battery cooling pipe to increase the temperature of the coolant in the battery cooling pipe.

[0119] In an optional implementation of the present application, the electronic device can obtain the working environment temperature corresponding to the electric engineering machinery. When the working environment temperature is higher than a third preset temperature threshold, the electronic device can control the air-conditioning system to lock, thereby prohibiting the air-conditioning system from operating.

[0120] Exemplarily, the third preset temperature threshold may be -20°C or -25°C. The embodiment of the present application does not specifically limit the third preset temperature threshold.

[0121] When the working environment temperature is lower than or equal to the third preset temperature threshold, the air-conditioning system of the electronic device can be controlled to unlock, thereby controlling the air-conditioning system to work accurately.

[0122] The first preset temperature threshold is higher than the second preset temperature threshold, and the second preset temperature threshold is higher than the third preset temperature threshold.

[0123] The thermal management system provided in the embodiment of the present application also includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device and the air conditioning device are connected in communication. If the second difference is greater than the fifth preset difference, the electronic device controls the air conditioning device to turn on the heating mode. Under the control of the electronic device, the air conditioning device turns on the cooling mode. The heat exchanger transfers heat to the battery cooling pipe to increase the temperature of the coolant in the battery cooling pipe. In this way, when the ambient temperature of the target battery is low, the surrounding environment can be quickly heated up, thereby avoiding the target battery from being unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal management system can accurately adjust the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0124] In an optional embodiment of the present application, as Figure 6 As shown, the motor heat dissipation device includes: a motor water pump and a motor cooling pipeline, wherein: a first end of the motor water pump is connected to a second end of the radiator, a second end of the motor water pump is connected to a first end of the motor cooling pipeline, and a second end of the motor cooling pipeline is connected to a second end of the battery cooling pipeline, wherein: the target motor includes at least one of a drive motor and an oil pump motor; wherein:

[0125] The electronic device is used to control the operation of the motor water pump when the target motor and its driving device are working, so as to reduce the temperature of the target motor.

[0126] Specifically, the electronic device can monitor the working status of the target motor and its driving device. When it is detected that the target motor and its driving device are working, the electronic device can control the motor water pump in the motor cooling device to work, thereby reducing the temperature of the target motor.

[0127] The motor water pump works under the control of electronic equipment, driving the coolant in the radiator to circulate in the motor cooling pipe, thereby controlling the temperature of the target motor.

[0128] The thermal management system provided in the embodiment of the present application, the motor heat dissipation device includes: a motor water pump and a motor cooling pipe, wherein: the first end of the motor water pump is connected to the second end of the radiator, the second end of the motor water pump is connected to the first end of the motor cooling pipe, and the second end of the motor cooling pipe is connected to the second end of the battery cooling pipe, wherein: the target motor includes at least one of a drive motor and an oil pump motor. When the target motor of the electronic device and its drive device are working, the motor water pump is controlled to work to reduce the temperature of the target motor, thereby avoiding the target motor from being overheated, and further ensuring the normal operation of the electric engineering machinery.

[0129] In order to better introduce the embodiment of the present application, a geothermal management system is provided. Figure 7 As shown, an embodiment of the present application provides a method for using a thermal management system, which is applied to the thermal management system of the first aspect or any corresponding embodiment thereof, and the method includes:

[0130] Step S101 : when the target motor and its driving device are working, the motor heat dissipation device is controlled to work so as to reduce the temperature of the target motor.

[0131] Step S102, obtain the current temperature of the environment surrounding the target battery in the electric engineering machinery, and obtain the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor, and control the battery cooling system according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

[0132] For how to use the thermal management system, please refer to the above introduction to the thermal management system and will not be repeated here.

[0133] The method for using the thermal management system provided in the embodiment of the present application is that when the target motor and its driving device are working, the motor heat dissipation device is controlled to work to reduce the temperature of the target motor, thereby avoiding a sudden increase in temperature during the operation of the target motor. The current temperature of the surrounding environment of the target battery in the electric engineering machinery is obtained, and the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor are obtained. According to the current temperature of the surrounding environment of the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor, the battery heat dissipation system is controlled, so that the current temperature of the surrounding environment of the target battery can be adjusted. Thereby, the temperature of the target battery can be avoided to be too high, and the thermal management requirements of the electric engineering machinery battery at high temperature can be avoided, and the target battery can be avoided to be unable to charge in a low temperature environment, or the charge and discharge rate is extremely low, which also seriously affects the use efficiency of the electric engineering machinery. Therefore, the above-mentioned thermal method can realize accurate adjustment of the current temperature of the surrounding environment of the target battery, thereby ensuring the normal operation of the target battery, and ensuring the normal operation of the electric engineering machinery, thereby ensuring the life of the electric engineering machinery.

[0134] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A thermal management system, characterized in that: The thermal management system is applied to electric engineering machinery, and the thermal management system includes: a battery cooling system, a motor cooling device, a radiator and an electronic device, wherein the battery cooling system and the motor cooling device are both connected to the radiator, the radiator contains coolant, and the electronic device is communicatively connected to the battery cooling system and the motor cooling device, wherein: The electronic device is used to control the motor heat dissipation device to operate when the target motor and its driving device are operating, so as to reduce the temperature of the target motor; The electronic device is also used to obtain the current temperature of the environment surrounding the target battery in the electric engineering machinery, and to obtain the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor, and to control the battery cooling system according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

2. The thermal management system according to claim 1, characterized in that: The battery cooling system comprises a battery water pump and a battery cooling pipe, wherein a first end of the battery water pump is connected to a second end of the radiator, a second end of the battery water pump is connected to a first end of the battery cooling pipe, and a second end of the battery cooling pipe is connected to a second end of the radiator, wherein: The electronic device is used to obtain a preset operating temperature range corresponding to the target battery, compare the current temperature with the maximum temperature and the minimum temperature in the preset operating temperature range; and control the battery water pump according to the comparison result.

3. The thermal management system according to claim 2, characterized in that: The electronic device is used to control the battery water pump to operate if the current temperature is greater than the maximum temperature; The battery water pump is used to drive the coolant in the radiator to circulate in the battery cooling pipe to reduce the current temperature of the environment around the target battery.

4. The thermal management system according to claim 2, characterized in that: The electronic device is further used to control the battery water pump to operate if the current temperature is lower than the minimum temperature; The battery water pump is used to drive the coolant in the radiator to circulate in the battery cooling pipe to increase the current temperature of the environment around the target battery.

5. The thermal management system according to claim 3, characterized in that: The thermal management system further includes a heat dissipation fan, which is communicatively connected to the electronic device, wherein: The electronic device is further configured to, if the current temperature is greater than the maximum temperature, subtract the maximum temperature from the current temperature to obtain a first difference between the current temperature and the maximum temperature; if the first difference is greater than a first preset difference, and / or the coolant temperature is greater than a first coolant temperature threshold, and / or the current motor temperature is greater than a first preset motor temperature, control the cooling fan to operate; If the first difference is smaller than the second preset difference, and the coolant temperature is smaller than the second coolant temperature threshold, and the current motor temperature is smaller than the second preset motor temperature, the cooling fan is controlled to stop working; wherein the second preset difference is smaller than the first preset difference, the second coolant temperature threshold is smaller than the first coolant temperature threshold, and the second preset motor temperature is smaller than the first preset motor temperature.

6. The thermal management system according to claim 5, characterized in that: The thermal management system also includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device is connected to the air conditioning device in communication, wherein, The electronic device is further configured to control the air conditioning device to start a cooling mode if the first difference is greater than a third preset difference, and / or the coolant temperature is greater than a third coolant temperature threshold; wherein the third preset difference is greater than the first preset difference; and the third coolant temperature threshold is greater than the first coolant temperature threshold; The air conditioning device is used to start a cooling mode under the control of the electronic device; The heat exchanger is used to reduce the temperature of the coolant in the battery cooling pipeline.

7. The thermal management system according to claim 4, characterized in that: The thermal management system further includes a heater, which is mounted on the battery cooling pipe, wherein the electronic device is communicatively connected to the heater, wherein: The electronic device also subtracts the current temperature from the minimum temperature to obtain a second difference between the current temperature and the minimum temperature if the current temperature is lower than the minimum temperature; and controls the heater to heat the coolant in the battery cooling pipe if the second difference is greater than a fourth preset difference.

8. The thermal management system according to claim 7, characterized in that: The thermal management system also includes an air conditioning system, wherein the air conditioning system includes an air conditioning device and a heat exchanger, one end of the heat exchanger is connected to the air conditioning device, and the other end is connected to the battery cooling pipe, and the electronic device is connected to the air conditioning device in communication, wherein, The electronic device is further configured to control the air conditioning device to start a heating mode if the second difference is greater than a fifth preset difference; the fifth preset difference is greater than the fourth preset difference; The air conditioning device is used to start a heating mode under the control of the electronic device; The heat exchanger is used to transfer heat to the battery cooling pipe to increase the temperature of the coolant in the battery cooling pipe.

9. The thermal management system according to claim 2, characterized in that: The motor heat dissipation device comprises: a motor water pump and a motor cooling pipeline, wherein: a first end of the motor water pump is connected to a second end of the radiator, a second end of the motor water pump is connected to a first end of the motor cooling pipeline, and a second end of the motor cooling pipeline is connected to a second end of the battery cooling pipeline, wherein: the target motor comprises at least one of a drive motor and an oil pump motor; wherein: The electronic device is used to control the motor water pump to operate when the target motor and the driving device thereof are operating, so as to reduce the temperature of the target motor.

10. A method for using a thermal management system, characterized in that: Applied to the thermal management system according to any one of claims 1 to 9, the method comprising: When the target motor and its driving device are working, controlling the motor heat dissipation device to work so as to reduce the temperature of the target motor; The current temperature of the environment surrounding the target battery in the electric engineering machinery is obtained, and the coolant temperature corresponding to the coolant of the radiator and the current motor temperature corresponding to the target motor are obtained, and the battery cooling system is controlled according to the current temperature of the environment surrounding the target battery, and / or the coolant temperature, and / or the current motor temperature corresponding to the target motor.

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