Thermal management method, apparatus, system, and program product

Abstract

The present disclosure relates to a heat management method, device, system and program product, and relates to the technical field of heat management. The heat management method comprises: determining refrigeration demand of a to-be-controlled device according to body heat and environmental heat of the to-be-controlled device; determining the number of target refrigeration devices for temperature control of the to-be-controlled device in a plurality of refrigeration devices according to the refrigeration demand of the to-be-controlled device; in the case where the number of target refrigeration devices for temperature control of the to-be-controlled device is multiple, determining a target refrigeration amount of each target refrigeration device; and performing temperature control on the to-be-controlled device based on the target refrigeration amount of each target refrigeration device.

Description

Technical Field

[0001] This disclosure relates to the field of thermal management technology, and in particular to a thermal management method, apparatus, system and program product. Background Technology

[0002] With the advancement of the zero-carbon transition goal, pure electric construction machinery has been applied on a large scale. Considering that the operating environment of pure electric construction machinery is becoming increasingly complex and harsh, and the intensity of operation is also increasing, the demand for charging efficiency of pure electric construction machinery is becoming increasingly urgent. Summary of the Invention

[0003] One of the technical problems this disclosure aims to solve is how to perform accurate and efficient thermal management of mechanical equipment during the charging process in order to improve the safety of the charging process.

[0004] According to some embodiments of the first aspect of this disclosure, a thermal management method is provided, comprising: determining the cooling demand of the device to be controlled based on the device's own heat and the ambient heat; determining the number of target cooling devices for temperature control of the device to be controlled among a plurality of cooling devices based on the cooling demand of the device to be controlled; determining the target cooling capacity of each target cooling device when there are multiple target cooling devices for temperature control of the device to be controlled; and performing temperature control of the device to be controlled based on the target cooling capacity of each target cooling device.

[0005] In some embodiments, when there are multiple devices to be controlled, determining the cooling requirements of the devices to be controlled based on the inherent heat of the devices to be controlled and the ambient heat includes: determining the sub-cooling requirements of each device to be controlled based on the inherent heat of each device to be controlled, the ambient heat, and the interference heat, wherein, for each device to be controlled, the interference heat includes: the inherent heat of the devices to be controlled excluding the device to be controlled and the interference heat of the devices to be controlled; and determining the cooling requirements of the multiple devices to be controlled based on the sub-cooling requirements of each device to be controlled.

[0006] In some embodiments, temperature control of the device to be controlled based on the target cooling capacity of each target cooling device includes: determining a first total cooling capacity of a plurality of target cooling devices according to the target cooling capacity of each target cooling device; and determining a first cooling capacity allocated to each device to be controlled according to the first total cooling capacity and the weight of each device to be controlled.

[0007] In some embodiments, determining the target cooling capacity of each target refrigeration device includes: determining a first target cooling capacity of each target refrigeration device based on the optimal compressor speed of each target refrigeration device; determining a second total cooling capacity of multiple target refrigeration devices based on the first target cooling capacity of each target refrigeration device; and determining the first target cooling capacity of each target refrigeration device as the target cooling capacity of each target refrigeration device when the second total cooling capacity is greater than or equal to the cooling demand.

[0008] In some embodiments, determining the target cooling capacity of each target refrigeration device further includes: when the second total cooling capacity is less than the cooling demand, determining a first target refrigeration device operating at maximum compressor speed and a second target refrigeration device operating at optimal energy efficiency compressor speed based on the cooling demand, a second cooling capacity generated by each target refrigeration device operating at maximum compressor speed, and a third cooling capacity generated by each target refrigeration device operating at optimal energy efficiency compressor speed; using the second cooling capacity generated by each refrigeration device in the first target refrigeration device operating at maximum compressor speed as the target cooling capacity of each refrigeration device in the first target refrigeration device, and using the third cooling capacity generated by each refrigeration device in the second target refrigeration device operating at optimal energy efficiency compressor speed as the target cooling capacity of each refrigeration device in the second target refrigeration device.

[0009] In some embodiments, when it is determined that multiple target refrigeration devices are all operating at maximum compressor speed, temperature control of the devices to be controlled based on the target cooling capacity of each target refrigeration device includes: assigning priority to each device to be controlled according to the urgency of its task; allocating a fourth cooling capacity to the highest priority device to the highest priority device according to its weight, wherein the fourth cooling capacity is equal to the cooling demand of the highest priority device; and, in response to the third total cooling capacity of the multiple target refrigeration devices being greater than the cooling demand of the highest priority device, allocating a fifth cooling capacity (excluding the fourth cooling capacity allocated to the highest priority device) from the third total cooling capacity to the non-highest priority devices to the fifth cooling capacity in descending order of priority, wherein the third total cooling capacity is determined based on the second target cooling capacity of each target refrigeration device, the second target cooling capacity of each target refrigeration device is determined based on the maximum compressor speed of the target refrigeration device, and the third total cooling capacity is less than the cooling demand.

[0010] In some embodiments, temperature control of the controlled device based on the target cooling capacity of each target cooling device further includes: reducing the charging current of the controlled device that is not of the highest priority when the third total cooling capacity does not meet the cooling demand.

[0011] In some embodiments, determining the number of target refrigeration devices for temperature control of the device under control among multiple refrigeration devices according to the cooling demand of the device under control includes: determining the optimal compressor speed corresponding to the peak performance coefficient region of each refrigeration device based on the motor efficiency characteristics, refrigerant type, and ambient heat of each refrigeration device; when the cooling demand is less than or equal to the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed, the number of target refrigeration devices for temperature control of the device under control among multiple refrigeration devices is determined to be one; when the cooling demand is greater than the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed, the number of target refrigeration devices for temperature control of the device under control among multiple refrigeration devices is determined to be multiple.

[0012] In some embodiments, determining the number of target refrigeration devices for temperature control of the device to be controlled among multiple refrigeration devices includes: determining a fourth total refrigeration capacity generated when all refrigeration devices operate at maximum compressor speed; and determining the number of target refrigeration devices for temperature control of the device to be controlled among multiple refrigeration devices as the number of all refrigeration devices when the refrigeration demand is greater than the fourth total refrigeration capacity.

[0013] In some embodiments, the thermal management method further includes: for each device to be controlled, determining the weight of the device to be controlled based on the battery temperature, state of charge, and charging current of the device to be controlled.

[0014] In some embodiments, determining the weight of the device to be controlled based on the battery temperature, state of charge (SBC), and charging current of the device to be controlled includes: determining the temperature weight of the device to be controlled based on the temperature coefficient, battery temperature, target temperature, and the maximum temperature value of the device to be controlled; determining the SBC weight of the device to be controlled based on the SBC coefficient, SBC, and the maximum SBC value of the device to be controlled; determining the charging current weight of the device to be controlled based on the charging current coefficient, charging current, and the maximum charging current value of the device to be controlled; and determining the weight of the device to be controlled based on the temperature weight, SBC weight, and charging current weight.

[0015] In some embodiments, the temperature weight is proportional to the battery temperature, the state of charge weight is proportional to the state of charge, and the charging current weight is proportional to the charging current.

[0016] In some embodiments, the thermal management method further includes: monitoring the coefficient of performance (COP) of each target refrigeration device; identifying target refrigeration devices with COPs less than a preset COP threshold as refrigeration devices to be adjusted; and adjusting the opening of the expansion valve of the refrigeration device to be adjusted according to the actual compressor speed of the refrigeration device to be adjusted.

[0017] In some embodiments, the heat of the device body is determined based on the charging current of the device to be controlled and the internal resistance of the battery, and the internal resistance of the battery is directly proportional to the battery temperature and state of charge of the device to be controlled; the heat of the environment is determined based on the heat exchange coefficient and the difference between the battery temperature and the ambient temperature of the environment in which the device to be controlled is located.

[0018] According to some embodiments of the second aspect of this disclosure, a thermal management device is provided, comprising: a first determining unit configured to determine the cooling demand of the device to be controlled based on the device's own heat and ambient heat; a second determining unit configured to determine the number of target cooling devices for temperature control of the device to be controlled among a plurality of cooling devices based on the cooling demand of the device to be controlled; a third determining unit configured to determine the target cooling capacity of each target cooling device when there are multiple target cooling devices for temperature control of the device to be controlled; and a control unit configured to perform temperature control of the device to be controlled based on the target cooling capacity of each target cooling device.

[0019] According to some embodiments of the third aspect of this disclosure, a thermal management apparatus is provided, including: a memory and a processor coupled to the memory, the processor being configured to execute the thermal management method of any of the above embodiments based on instructions stored in the memory.

[0020] According to some embodiments of the fourth aspect of this disclosure, a thermal management system is provided, including the thermal management device in any of the above embodiments; and a thermal management circuit.

[0021] In some embodiments, the thermal management circuit includes: multiple refrigeration circuit segments, each including multiple target refrigeration devices, wherein the multiple refrigerant circuit segments and the multiple target refrigeration devices correspond one-to-one; a heat dissipation circuit segment connected to a first end of the multiple refrigeration circuit segments, the heat dissipation circuit being configured to dissipate heat generated by the multiple refrigeration circuit segments; and multiple sets of interfaces, the first end of the multiple sets of interfaces being connected to a second end of the multiple refrigeration circuit segments, the second end of the multiple sets of interfaces being connected to the water inlet of the battery of the device to be controlled, and the third end of the multiple sets of interfaces being connected to the water outlet of the battery of the device to be controlled.

[0022] In some embodiments, the thermal management system further includes a sensor configured to acquire the battery internal resistance, charging current, and battery temperature of the device to be controlled.

[0023] According to some embodiments of the fifth aspect of this disclosure, a computer-readable storage medium is provided having computer instructions stored thereon that, when executed by a processor, implement the thermal management method of any of the above embodiments.

[0024] According to some embodiments of the sixth aspect of this disclosure, a computer program product is provided, including computer instructions that, when executed by a processor, implement the thermal management method of any of the above embodiments.

[0025] In the above embodiments, the cooling requirements of the device under control are determined based on the heat of the device itself and the ambient heat, providing feasibility for accurate thermal management of the device under control during the subsequent charging process. Based on the cooling requirements of the device under control, the number of target cooling devices for temperature control of the device under control among multiple cooling devices is determined, providing feasibility for efficient thermal management of the device under control during the subsequent charging process, and providing technical support for temperature control when charging the device under control with high charging power. By controlling the temperature of the device under control based on the target cooling capacity of each target cooling device, the safety and charging efficiency of the charging process of the device under control are improved, and the risk of charging efficiency decrease or charging interruption caused by battery overheating of the device under control is reduced. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0027] This disclosure can be more clearly understood with reference to the accompanying drawings and the following detailed description.

[0028] Figure 1 Schematic diagrams illustrating some embodiments of the thermal management method of this disclosure.

[0029] Figure 2 Schematic diagrams illustrating some other embodiments of the thermal management method of this disclosure are shown.

[0030] Figure 3 Schematic diagrams illustrating some embodiments of the thermal management apparatus of this disclosure.

[0031] Figure 4 Schematic diagrams showing other embodiments of the thermal management apparatus of this disclosure are provided.

[0032] Figure 5 Schematic diagrams of other embodiments of the thermal management system of this disclosure are shown.

[0033] Figure 6 Schematic diagrams illustrating some embodiments of the thermal management circuit of this disclosure are shown. Detailed Implementation

[0034] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0035] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0040] With the advancement of the zero-carbon transition goal, pure electric construction machinery such as large-tonnage mining dump trucks and loaders has been widely used. In particular, pure electric construction machinery operating in mines in tropical regions is increasingly in demand. Considering that the extreme environmental temperature in tropical mines can reach 55°C throughout the year, and considering the high intensity of operation of the construction machinery, the downtime of the machinery will directly affect the production capacity. Therefore, the demand for charging efficiency of construction machinery is becoming increasingly urgent, and it is necessary to promote the rapid popularization of megawatt-level fast charging technology in this type of machinery.

[0041] However, the main problem in promoting megawatt-level fast charging technology is that during the megawatt-level fast charging process, the power battery of construction machinery experiences a surge in instantaneous heat generation due to the high current charging and discharging process, leading to an exponential increase in the cooling demand of the construction machinery under charging conditions. Experiments have shown that the cooling demand during the charging of construction machinery using megawatt-level fast charging technology is typically greater than 100kW, which is 3 to 5 times that under normal operation (such as loading and transportation operations). At the same time, the high temperature environment of 55°C in tropical conditions adds to the heat dissipation load, making construction machinery face the dual challenges of high ambient temperature and high-power charging temperature. Thermal management of construction machinery faces stringent challenges in terms of heat dissipation power, response speed, and environmental adaptability. Therefore, how to accurately and efficiently manage the thermal of mechanical equipment during the charging process to improve the safety of the charging process has become a problem that needs to be solved.

[0042] Therefore, how to perform accurate and efficient thermal management of the mechanical equipment during the charging process to improve the safety of the charging process is a problem that needs to be solved. To address this issue, this disclosure proposes a thermal management method, as follows.

[0043] Figure 1 Schematic diagrams illustrating some embodiments of the thermal management method of this disclosure.

[0044] like Figure 1 As shown, the thermal management method includes steps 110 to 140, and the thermal management method is performed by a thermal management device.

[0045] In step 110, the cooling requirements of the device to be controlled are determined based on the heat of the device itself and the ambient heat.

[0046] For example, the equipment to be controlled can be pure electric construction machinery, such as mining dump trucks and mining loaders. Another example is determining the cooling requirements of the equipment during the charging process based on the heat generated by the equipment itself and the ambient heat. This charging process can be a high-power charging process, such as a megawatt-level charging process.

[0047] The cooling requirement of the controlled device refers to the amount of cooling required to maintain the temperature of the controlled device within the normal temperature range, based on the heat of the device itself and the heat of the environment.

[0048] For example, the cooling demand of the device to be controlled can be the cooling demand of the device to be controlled per unit time, wherein the cooling demand of the device to be controlled per unit time can be determined based on the heat of the device itself per unit time and the heat of the environment per unit time.

[0049] For example, the unit of time can be set as needed, such as 10 seconds or 15 seconds.

[0050] For example, the target cooling equipment and the equipment to be controlled can be installed independently, without integration. Independent installation allows for lightweighting of the equipment to be controlled, reducing power consumption and cost during operation. This reduces the weight redundancy (weight reduction of approximately 20% or more) and volume redundancy (volume reduction of approximately 15% or more) of the thermal management system on the equipment side, which is required to adapt to the charging process and operating conditions of the equipment. The thermal management system on the equipment side disclosed in this invention only needs to adapt to the cooling requirements of the operating conditions.

[0051] To obtain ambient temperature, an ambient temperature sensor (range -20℃ to 80℃, accuracy ±0.5℃) deployed locally in the target refrigeration equipment can be used to monitor the ambient temperature in real time. At the same time, other sensors can be used to collect operating parameters in the target refrigeration equipment, such as actual compressor speed, current, water pump flow, expansion valve opening, and on / off status of multiple interfaces.

[0052] In step 120, the number of target refrigeration devices for temperature control of the device to be controlled is determined among multiple refrigeration devices based on the refrigeration requirements of the device to be controlled.

[0053] If the cooling demand of the device to be controlled is relatively large, multiple target cooling devices are used to control the temperature of the device to achieve efficient thermal management. If the cooling demand of the device to be controlled is relatively small, a single target cooling device is used to control the temperature of the device, reducing unnecessary startup of the target cooling device and reducing the energy consumption of the target cooling device.

[0054] In step 130, when there are multiple target refrigeration devices for temperature control of the controlled device, the target refrigeration capacity of each target refrigeration device is determined.

[0055] For example, the target cooling capacity of each target refrigeration unit can be determined based on the optimal compressor speed and / or maximum compressor speed of each target refrigeration unit.

[0056] In step 140, the temperature of the device to be controlled is controlled based on the target cooling capacity of each target refrigeration device.

[0057] For example, the target cooling capacity of each target refrigeration device can be the cooling capacity generated by each target refrigeration device per unit time.

[0058] In the above embodiments, the cooling requirements of the device under control are determined based on the heat of the device itself and the ambient heat, providing feasibility for accurate thermal management of the device under control during the subsequent charging process. Based on the cooling requirements of the device under control, the number of target cooling devices for temperature control of the device under control among multiple cooling devices is determined, providing feasibility for efficient thermal management of the device under control during the subsequent charging process, and providing technical support for temperature control when charging the device under control with high charging power. By controlling the temperature of the device under control based on the target cooling capacity of each target cooling device, the safety and charging efficiency of the charging process of the device under control are improved, and the risk of charging efficiency decrease or charging interruption caused by battery overheating of the device under control is reduced.

[0059] For situations where there are multiple devices to be controlled, the following embodiments describe how to determine the cooling requirements of the devices to be controlled.

[0060] In some embodiments, when there are multiple devices to be controlled, determining the cooling requirements of the devices to be controlled based on the inherent heat of the devices to be controlled and the ambient heat includes: determining the sub-cooling requirements of each device to be controlled based on the inherent heat of each device to be controlled, the ambient heat, and the interference heat, wherein, for each device to be controlled, the interference heat includes: the inherent heat of the devices to be controlled excluding the device to be controlled and the interference heat of the devices to be controlled; and determining the cooling requirements of the multiple devices to be controlled based on the sub-cooling requirements of each device to be controlled.

[0061] For example, the cooling demand of the controlled equipment per unit time can be determined based on the equipment's internal heat per unit time, the ambient heat per unit time, and the disturbance heat of the controlled equipment per unit time.

[0062] For example, the interference heat of the device to be controlled per unit time can be the interference heat of the device to be controlled caused by the body heat of other devices to be controlled (excluding the device to be controlled) per unit time.

[0063] Determine the sub-cooling requirements of each device to be controlled and the cooling requirements of multiple devices to be controlled, as shown in formulas (1) to (3).

[0064] (1)

[0065] in, This represents the heat of the i-th device to be controlled. This represents the charging current of the i-th device to be controlled. Let represent the internal resistance of the battery of the i-th device to be controlled. This represents the battery temperature of the i-th device to be controlled. Let represent the state of charge (SOC) of the battery of the i-th device to be controlled. The internal resistance of the battery of the i-th device to be controlled is directly proportional to the battery temperature and SOC of the battery of the i-th device to be controlled. The internal resistance of the battery changes dynamically with the battery temperature and SOC.

[0066] (2)

[0067] in, This represents the ambient heat of the i-th device to be controlled. This represents the heat exchange coefficient of the i-th controlled device, which is related to the cabin sealing performance of the i-th controlled device. This represents the ambient temperature of the environment where the i-th device to be controlled is located. Let i represent the function of the environmental heat exchange quantity of the i-th device to be controlled.

[0068] (3)

[0069] in, This indicates the cooling requirements of multiple devices to be controlled. Let represent the sub-cooling demand of the i-th device to be controlled, and n represent the number of devices to be controlled. This represents the interference heat of the i-th device to be controlled, which can be determined through historical data or experiments.

[0070] When dealing with multiple devices to be controlled, the interference heat between these devices is taken into account, enabling accurate determination of the cooling requirements of each device and providing a solid foundation for accurate thermal management of the controlled devices.

[0071] In addition, a mapping can be established between the cooling demand of the controlled equipment, the number of target cooling equipment, the compressor speed (5000-22000rpm) of the target cooling equipment, and the performance coefficient of the target cooling equipment. A database of efficient operating ranges under different cooling demands can be generated in advance. That is, under different cooling demands, the performance coefficient of the target cooling equipment corresponding to different compressor speeds of different target cooling equipment (for example, the performance coefficient is highest when a single target cooling equipment is in the cooling capacity range of 80-120kW, and the performance coefficient is highest when two target cooling equipment are in the cooling capacity range of 180-300kW).

[0072] The following embodiments illustrate how to perform temperature control on the device to be controlled.

[0073] In some embodiments, temperature control of the device to be controlled based on the target cooling capacity of each target cooling device includes: determining a first total cooling capacity of a plurality of target cooling devices according to the target cooling capacity of each target cooling device; and determining a first cooling capacity allocated to each device to be controlled according to the first total cooling capacity and the weight of each device to be controlled.

[0074] For example, the first total cooling capacity of multiple target refrigeration devices is determined based on the sum of their target cooling capacities. The weight of each device to be controlled is directly proportional to its sub-cooling demand; that is, the greater the sub-cooling demand of a device to be controlled, the greater its weight.

[0075] Assume there is one target refrigeration device and three devices to be controlled, namely Device 1, Device 2, and Device 3. Device 1 has a weight of 0.4, Device 2 has a weight of 0.3, and Device 3 has a weight of 0.3. Allocate 40% of the first total refrigeration capacity as the first refrigeration capacity of Device 1, 30% of the first total refrigeration capacity as the first refrigeration capacity of Device 2, and 30% of the first total refrigeration capacity as the first refrigeration capacity of Device 3.

[0076] By determining the target cooling capacity of each target refrigeration device, the cooling capacity generated by each target refrigeration device per unit time is determined. By determining the weight of each device to be controlled, the first cooling capacity allocated to each device to be controlled is determined, that is, the first cooling capacity allocated to each device to be controlled per unit time. Thus, based on the cooling capacity generated by each target refrigeration device per unit time and the first cooling capacity allocated to each device to be controlled per unit time, accurate temperature control of the devices to be controlled can be achieved.

[0077] The following example illustrates how to control the temperature of the devices to be controlled, using the case of three devices to be controlled and two target refrigeration devices.

[0078] Assume there are three devices to be controlled, namely device A, device B, and device C, and two target cooling devices, namely target cooling devices D and target cooling devices E. The target cooling capacity of target cooling device D is 120 kW, and the target cooling capacity of target cooling device E is 80 kW. The weight of device A is 0.4, the weight of device B is 0.3, and the weight of device C is 0.3.

[0079] For example, assuming that the total target cooling capacity of each target refrigeration device can be equal to the total sub-cooling demand of each device to be controlled, then target refrigeration device D can provide 80kW of cooling capacity to device A, target device D can also provide 40kW of cooling capacity to device B, target device E can provide 20kW of cooling capacity to device B, and target device E can also provide 60kW of cooling capacity to device C.

[0080] The following examples illustrate how to determine the target cooling capacity of each target refrigeration device.

[0081] In some embodiments, determining the target cooling capacity of each target refrigeration device includes: determining a first target cooling capacity of each target refrigeration device based on the optimal compressor speed of each target refrigeration device; determining a second total cooling capacity of multiple target refrigeration devices based on the first target cooling capacity of each target refrigeration device; and determining the first target cooling capacity of each target refrigeration device as the target cooling capacity of each target refrigeration device when the second total cooling capacity is greater than or equal to the cooling demand.

[0082] For example, the optimal compressor speed refers to the compressor speed that enables the target refrigeration equipment to reach its maximum energy efficiency ratio, where the compressor is a component of the target refrigeration equipment.

[0083] By operating each target refrigeration device at its optimal compressor speed, the first target cooling capacity generated by each target refrigeration device at its optimal compressor speed is determined. This leads to the determination of the second total cooling capacity of multiple target refrigeration devices. If the second total cooling capacity is greater than or equal to the cooling demand of the device under control, it indicates that the second total cooling capacity generated by each target refrigeration device operating at its optimal compressor speed can meet the cooling demand of the device under control. In this case, using the first target cooling capacity generated by each target refrigeration device operating at its optimal compressor speed as the target cooling capacity of each target refrigeration device ensures that each target refrigeration device operates at the compressor speed with the highest energy efficiency ratio while meeting the cooling demand, thus improving the working efficiency of each target refrigeration device.

[0084] In some embodiments, determining the target cooling capacity of each target refrigeration device further includes: when the second total cooling capacity is less than the cooling demand, determining a first target refrigeration device operating at maximum compressor speed and a second target refrigeration device operating at optimal energy efficiency compressor speed based on the cooling demand, a second cooling capacity generated by each target refrigeration device operating at maximum compressor speed, and a third cooling capacity generated by each target refrigeration device operating at optimal energy efficiency compressor speed; using the second cooling capacity generated by each refrigeration device in the first target refrigeration device operating at maximum compressor speed as the target cooling capacity of each refrigeration device in the first target refrigeration device, and using the third cooling capacity generated by each refrigeration device in the second target refrigeration device operating at optimal energy efficiency compressor speed as the target cooling capacity of each refrigeration device in the second target refrigeration device.

[0085] If the second total cooling capacity generated when all target refrigeration equipment is operating at the optimal compressor speed cannot meet the refrigeration demand, then it is necessary to determine the first target refrigeration equipment operating at the maximum compressor speed and the second target refrigeration equipment operating at the optimal compressor speed among all target refrigeration equipment, based on the refrigeration demand, the second cooling capacity, and the third cooling capacity. The second cooling capacity is then used as the target cooling capacity for each refrigeration equipment in the first target refrigeration equipment, and the third cooling capacity is used as the target cooling capacity for each refrigeration equipment in the second target refrigeration equipment (if there is a second target refrigeration equipment), so as to maximize the total cooling capacity generated by all the first target refrigeration equipment and all the second target refrigeration equipment to meet the refrigeration demand. The number of second target refrigeration equipment can be zero, and the number of first target refrigeration equipment can be equal to the number of all target refrigeration equipment.

[0086] When the total cooling capacity is less than the cooling demand, the target cooling capacity of the target cooling equipment can be dynamically adjusted in real time, and the cooling demand can be responded to in a timely manner to provide the cooling capacity that meets the cooling demand of the controlled equipment. This achieves accurate thermal management of the controlled equipment and improves the safety of the charging process of the controlled equipment.

[0087] For example, if the total cooling capacity generated by all target refrigeration equipment operating at maximum compressor speed is still insufficient to meet the cooling demand, all target refrigeration equipment can continue to operate at maximum compressor speed to provide cooling capacity for the controlled equipment. Thermal management can also be carried out in the following ways, as detailed below.

[0088] In some embodiments, if the total cooling capacity generated when all target refrigeration devices are running at maximum compressor speed is still insufficient to meet the cooling demand, it is determined whether the number of target refrigeration devices is equal to the number of refrigeration devices; if the number of target refrigeration devices is less than the number of refrigeration devices, the number of additional target refrigeration devices is determined based on the cooling difference between the total cooling capacity generated when all target refrigeration devices are running at maximum compressor speed and the cooling demand, wherein the sum of the number of target refrigeration devices and the number of additional target refrigeration devices is less than or equal to the number of refrigeration devices.

[0089] For example, the number of new target refrigeration units can be determined based on the cooling capacity and cooling difference generated when the new target refrigeration units operate at their maximum compressor speed, or based on the cooling capacity and cooling difference generated when the new target refrigeration units operate at their most energy-efficient compressor speed.

[0090] The following embodiments describe how to control the temperature of the device under control when all target refrigeration equipment is operating at maximum compressor speed.

[0091] In some embodiments, when it is determined that multiple target refrigeration devices are all operating at maximum compressor speed, temperature control of the devices to be controlled based on the target cooling capacity of each target refrigeration device includes: assigning priority to each device to be controlled according to the urgency of its task; allocating a fourth cooling capacity to the highest priority device to the highest priority device according to its weight, wherein the fourth cooling capacity is equal to the cooling demand of the highest priority device; and, in response to the third total cooling capacity of the multiple target refrigeration devices being greater than the cooling demand of the highest priority device, allocating a fifth cooling capacity (excluding the fourth cooling capacity allocated to the highest priority device) from the third total cooling capacity to the non-highest priority devices to the fifth cooling capacity in descending order of priority, wherein the third total cooling capacity is determined based on the second target cooling capacity of each target refrigeration device, the second target cooling capacity of each target refrigeration device is determined based on the maximum compressor speed of the target refrigeration device, and the third total cooling capacity is less than the cooling demand.

[0092] If the total third cooling capacity is less than the cooling demand, it means that even if all target refrigeration equipment operates at maximum compressor speed, it will still be difficult to meet the cooling demand. In other words, in this case, it is impossible to simultaneously meet the sub-cooling demands of all controlled equipment. If the total third cooling capacity is greater than or equal to the cooling demand, it means that if all target refrigeration equipment operates at maximum compressor speed, it can meet the cooling demand. In other words, in this case, it is possible to simultaneously meet the sub-cooling demands of all controlled equipment.

[0093] For example, "all target refrigeration equipment" could refer to all refrigeration equipment or only some of them. The urgency of the task of the device to be controlled is directly proportional to its priority; the higher the urgency of the task, the higher the priority of the device.

[0094] When the total cooling capacity is less than the cooling demand, by assigning priority to each device based on the urgency of its task, and allocating a fourth cooling capacity to the highest priority device to meet its cooling demand, the cooling needs of the devices with higher urgency can be effectively and quickly guaranteed. This also ensures the operating efficiency of the highest priority device to a certain extent and improves the safety of the charging process.

[0095] If the total cooling capacity exceeds the cooling demand of the highest-priority controlled device, a fifth cooling capacity is allocated to the non-highest-priority controlled devices according to their priority from highest to lowest. This fifth cooling capacity is equal to the difference between the total third cooling capacity and the fourth cooling capacity, and is less than the cooling demand of the non-highest-priority controlled devices. This cooling capacity allocation method improves the safety of the charging process for non-highest-priority controlled devices to some extent.

[0096] For example, the fifth cooling capacity is allocated to the non-highest priority control device according to the order of priority from high to low. Alternatively, different proportions of cooling capacity are allocated to the non-highest priority control devices according to the order of priority from high to low. These different proportions refer to a certain percentage of the cooling demand of the current priority control device. Examples are given below.

[0097] Assume there are four devices to be controlled (device 1, device 2, device 3, and device 4), and the total cooling demand of all devices is 300kW. Based on the urgency of each device, priorities are assigned to the four devices. Device 1 has the highest priority (first priority), devices 2 and 3 have the second highest priority (second priority), and device 4 has the third highest priority (third priority). The sub-cooling demand of device 1 is 100kW, that of device 2 is 60kW, that of device 3 is 60kW, and that of device 4 is 80kW. If all devices operate at maximum compressor speed, the total cooling capacity produced is 200kW.

[0098] First, allocate 100kW of cooling capacity to device 1, which belongs to the first priority category. Since device 1 is of the first priority, the allocated cooling capacity must meet its cooling requirements. Of the total 200kW cooling capacity, after deducting the cooling capacity allocated to device 1, 100kW remains. Next, allocate 0.6 times the sum of the sub-cooling requirements of device 2 and device 3, which belong to the second priority category, to devices 2 and 3. Allocate 0.35 times the sub-cooling requirements of device 4, which belongs to the third priority category, to device 4. That is, the proportion of cooling capacity allocated to devices of the second priority category is 0.6, and the proportion allocated to devices of the third priority category is 0.35. The higher the priority of a device, the higher the proportion of cooling capacity allocated to it.

[0099] In the case where the total cooling capacity is insufficient to meet the cooling demand, the following embodiment describes how to perform temperature control on the controlled equipment, as detailed below.

[0100] In some embodiments, temperature control of the controlled device based on the target cooling capacity of each target cooling device further includes: reducing the charging current of the controlled device that is not of the highest priority when the third total cooling capacity does not meet the cooling demand.

[0101] For example, the controller of a non-highest priority device can send a current reduction request to the charging system to request a reduction in the charging current of the non-highest priority device, thereby reducing the risk of charging safety problems caused by excessively high battery temperature due to excessive charging current in the non-highest priority device.

[0102] When the third total cooling capacity is insufficient to meet the cooling demand, it means that even if all target cooling devices operate at maximum compressor speed, the third total cooling capacity cannot meet the cooling demand of non-highest priority controlled devices. By reducing the charging current of non-highest priority controlled devices, the heat generated by the non-highest priority controlled devices can be improved to a certain extent, thereby reducing the cooling demand of non-highest priority controlled devices. When the total cooling capacity is insufficient, reducing the charging current reduces the cooling demand and improves the safety of the charging process of non-highest priority controlled devices.

[0103] The following embodiments describe how to determine the number of target refrigeration devices for temperature control among multiple refrigeration devices.

[0104] In some embodiments, determining the number of target refrigeration devices for temperature control of the device under control among multiple refrigeration devices according to the cooling demand of the device under control includes: determining the optimal compressor speed corresponding to the peak performance coefficient region of each refrigeration device based on the motor efficiency characteristics, refrigerant type, and ambient heat of each refrigeration device; when the cooling demand is less than or equal to the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed, the number of target refrigeration devices for temperature control of the device under control among multiple refrigeration devices is determined to be one; when the cooling demand is greater than the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed, the number of target refrigeration devices for temperature control of the device under control among multiple refrigeration devices is determined to be multiple.

[0105] By comparing the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed with the cooling demand of the device under control, the number of target refrigeration devices can be determined. Based on the cooling demand of the device under control, an appropriate number of target refrigeration devices can be allocated to it. This reduces the risk of wasting resources due to allocating too many target refrigeration devices, and also reduces the risk of failing to meet the cooling demand of the device under control due to allocating too few target refrigeration devices, thereby reducing the safety risks during the charging process of the device under control.

[0106] In some embodiments, determining the number of target refrigeration devices for temperature control of the device to be controlled among multiple refrigeration devices includes: determining a fourth total refrigeration capacity generated when all refrigeration devices operate at maximum compressor speed; and determining the number of target refrigeration devices for temperature control of the device to be controlled among multiple refrigeration devices as the number of all refrigeration devices when the refrigeration demand is greater than the fourth total refrigeration capacity.

[0107] In cases where the total cooling capacity generated by all refrigeration equipment operating at maximum compressor speed is less than the cooling demand of the device under control, all refrigeration equipment needs to be used as target refrigeration equipment to provide cooling capacity to the device under control, so as to provide as much cooling capacity as possible to ensure the safety of the charging process of the device under control to a certain extent.

[0108] For cases where the number of target refrigeration devices is multiple but not equal to the total number of refrigeration devices, the specific steps are as follows: If the cooling demand of the device to be controlled is greater than the cooling capacity produced by any one of the refrigeration devices operating at its optimal compressor speed, and the cooling demand of the device to be controlled is less than the cooling capacity produced by a specific number of refrigeration devices operating at their maximum compressor speed, the number of target refrigeration devices can be determined based on the cooling demand of the device to be controlled. If the cooling demand of the device to be controlled is less than or equal to the cooling capacity produced by all refrigeration devices operating at their optimal compressor speed, the number of target refrigeration devices is directly determined based on the cooling demand of the device to be controlled and the cooling capacity produced by each refrigeration device operating at its optimal compressor speed. If the cooling demand of the device to be controlled is greater than the cooling capacity produced by all refrigeration devices operating at their optimal compressor speed, the number of target refrigeration devices is determined based on the cooling demand of the device to be controlled, the cooling capacity produced by each refrigeration device operating at its optimal compressor speed, and the cooling capacity produced by each refrigeration device operating at its maximum compressor speed. Here, the specific number is the total number of refrigeration devices minus one.

[0109] The following examples illustrate how to determine the weight of the device to be controlled.

[0110] In some embodiments, for each device to be controlled, the weight of the device to be controlled is determined based on the battery temperature, state of charge, and charging current of the device to be controlled.

[0111] By determining the weight of each device under control based on its battery temperature, state of charge, and charging current, the system provides a feasible basis for allocating cooling capacity to each device based on its weight. Furthermore, it can allocate corresponding cooling capacity to different devices based on differences in battery temperature, state of charge, and charging current, enabling accurate thermal management of devices under control during the charging process.

[0112] In some embodiments, determining the weight of the device to be controlled based on the battery temperature, state of charge (SBC), and charging current of the device to be controlled includes: determining the temperature weight of the device to be controlled based on the temperature coefficient, battery temperature, target temperature, and the maximum temperature value of the device to be controlled; determining the SBC weight of the device to be controlled based on the SBC coefficient, SBC, and the maximum SBC value of the device to be controlled; determining the charging current weight of the device to be controlled based on the charging current coefficient, charging current, and the maximum charging current value of the device to be controlled; and determining the weight of the device to be controlled based on the temperature weight, SBC weight, and charging current weight.

[0113] In determining the weights of the devices to be controlled, multiple dimensions such as temperature weight, state of charge weight, and charging current weight are used to determine the weights of the devices to be controlled, which improves the accuracy of the weights and helps to achieve accurate thermal management of the devices to be controlled.

[0114] In some embodiments, the temperature weight is proportional to the battery temperature, the state of charge weight is proportional to the state of charge, and the charging current weight is proportional to the charging current.

[0115] If the battery temperature, state of charge, or charging current of the device to be controlled is relatively high, the weight of the device to be controlled will be relatively large, indicating that the cooling demand of the device to be controlled is relatively large.

[0116] The weight of the device to be controlled is determined as shown in formula (4). The greater the weight of the device to be controlled, the greater the proportion of cooling capacity allocated to that device.

[0117] (4)

[0118] in, This represents the weight of the i-th device to be controlled. This represents the temperature weight of the i-th device to be controlled. This represents the state-of-charge weight of the i-th device to be controlled. This represents the weight of the charging current of the i-th device to be controlled. This represents the target battery temperature (e.g., 30°C) of the battery of the i-th device to be controlled. This represents the upper limit battery temperature (e.g., 45°C) of the battery of the i-th device to be controlled. This represents the state of charge (SOC) corresponding to a fully charged battery of the i-th device to be controlled. This represents the rated charging current of the battery of the i-th device to be controlled.

[0119] The adjustment process of the target refrigeration equipment is described below with reference to the following embodiments.

[0120] In some embodiments, the thermal management method further includes: monitoring the coefficient of performance (COP) of each target refrigeration device; identifying target refrigeration devices with COPs less than a preset COP threshold as refrigeration devices to be adjusted; and adjusting the opening of the expansion valve of the refrigeration device to be adjusted according to the actual compressor speed of the refrigeration device to be adjusted.

[0121] By monitoring the coefficient of performance (COP) of each target refrigeration unit, those with COPs below a preset threshold are identified as units requiring adjustment. A COP below the threshold indicates high energy consumption. Adjusting the expansion valve opening of the unit based on its actual compressor speed helps optimize its energy efficiency and improve its overall performance. For example, adjusting the expansion valve opening can be achieved by controlling it to change proportionally with the actual compressor speed. This proportionality could be 0.8 times, and the change could be an increase or decrease. An increase in the actual compressor speed leads to an increase in the expansion valve opening, and a decrease in the actual compressor speed leads to a decrease in the expansion valve opening.

[0122] In some embodiments, the temperature difference between the inlet and outlet of the battery of each device under control is monitored. When the temperature difference of a device under control is greater than a preset temperature threshold, it indicates that the battery has experienced local overheating. In this case, the cooling capacity allocated to the device under control can be increased individually within a preset time.

[0123] The following embodiments describe a method for determining the heat of the device to be controlled and the heat of the environment.

[0124] In some embodiments, the heat of the device body is determined based on the charging current of the device to be controlled and the internal resistance of the battery, and the internal resistance of the battery is directly proportional to the battery temperature and state of charge of the device to be controlled; the heat of the environment is determined based on the heat exchange coefficient and the difference between the battery temperature and the ambient temperature of the environment in which the device to be controlled is located.

[0125] The above embodiments provide a specific method for determining the heat of the device under control and the heat of the environment, ensuring accurate determination of the cooling requirements of the device under control.

[0126] For example, the charging current (range 0-2000A), battery internal resistance, battery temperature, and state of charge of the device under control can be acquired and sent by the controller of the device under control. The thermal management device does not directly collect the charging current, battery internal resistance, battery temperature, and state of charge of the device under control, but acquires them through the controller of the device under control.

[0127] For example, real-time communication between the thermal management device and the controller of each device to be controlled is achieved through a CAN (Controller Area Network) bus (CAN2.0B bus). For example, the communication rate is 500kbps and the sampling frequency is 10Hz.

[0128] Regarding the battery temperature of the device to be controlled, the controller of the device to be controlled can integrate the temperature distribution of the battery modules collected by the BMS (Battery Management System) of the device to be controlled (1 monitoring point for every 20 battery modules).

[0129] Considering that directly accessing the battery data of different controlled devices would involve the protocols supported by the batteries, and different batteries support different protocols, directly accessing the battery data would increase the complexity of the thermal management device. Obtaining the relevant battery data through the controller of the controlled device can simplify the processing difficulty of the thermal management system and increase the application scope of the thermal management system.

[0130] In some embodiments, the highest battery temperature, lowest battery temperature, and average battery temperature of the device under control are monitored to capture the risk of localized hot spots in real time. That is, if localized hot spots occur in the battery, they can be overcome by reducing the charging current or by increasing the cooling capacity allocated to the device under control.

[0131] In some embodiments, the rate of change of the charging current of the controlled device is monitored to predict whether the cooling demand of the controlled device will suddenly change, including a sudden decrease or a sudden increase (e.g., a sudden increase in current caused by a fast charging phase switch). If it is predicted that the charging current of a certain controlled device will suddenly increase, the cooling capacity allocated to the controlled device will be increased. If it is predicted that the charging current of a certain controlled device will suddenly decrease, the cooling capacity allocated to the controlled device will be reduced.

[0132] In some embodiments, the charging phase of the controlled device (e.g., pre-charge phase, constant current phase, or constant voltage phase) is monitored to predict the subsequent cooling demand of the controlled device, so as to adjust the control strategy for allocating cooling capacity to different controlled devices in a timely manner.

[0133] In response to a sudden change in the cooling demand of a certain controlled device, for example, if the cooling demand of a certain controlled device increases by 20% due to a sudden increase in current, the cooling capacity allocated to that controlled device can be increased within 0.5 seconds. At the same time, the cooling capacity allocated to other controlled devices can be finely adjusted. This can control the fluctuation of the cooling capacity corresponding to each other controlled device to be less than or equal to 5%, thereby ensuring the stability of the total cooling capacity of the target cooling device as much as possible.

[0134] Figure 2 Schematic diagrams illustrating some other embodiments of the thermal management method of this disclosure are shown.

[0135] like Figure 2 As shown, the thermal management method includes steps 201 to 218.

[0136] In step 201, preparations are made to begin thermal management.

[0137] In step 202, the device to be controlled is connected to multiple sets of interfaces of the thermal management loop. If there is one device to be controlled, the device to be controlled is connected to one set of interfaces of the thermal management loop. If there are multiple devices to be controlled, the multiple devices to be controlled are connected to multiple sets of interfaces of the thermal management loop respectively. The multiple devices to be controlled and the multiple sets of interfaces are in one-to-one correspondence.

[0138] In step 203, the thermal management device (which may also be a TMS controller) establishes communication with the controller of the device to be controlled (if the device to be controlled is a vehicle, the controller is a vehicle control unit (VCU)) and determines whether the communication has been successfully established.

[0139] If communication is successfully established, proceed directly to step 205; if communication is not successfully established, proceed to step 204.

[0140] In step 204, a communication failure is indicated, and the system waits for a reconnection.

[0141] After executing step 204, proceed directly to step 201.

[0142] In step 205, multi-source data acquisition is performed. The multi-source data includes the charging current, state of charge, battery internal resistance, and battery temperature of the device to be controlled, forwarded by the controller of the device to be controlled; the local ambient temperature; and the actual compressor speed and coefficient of performance of the target refrigeration equipment.

[0143] In step 206, the number of devices to be controlled and the charging stage of each device to be controlled are determined.

[0144] By analyzing the charging phase of each device under control, it is possible to predict whether there will be sudden changes in the charging current of each device. This allows for timely adjustments to the cooling capacity allocated to each device in response to such sudden changes.

[0145] In step 207, the cooling requirements of the device to be controlled are determined.

[0146] If there is a single device to be controlled, the cooling demand of the device to be controlled is the sub-cooling demand of that device. If there are multiple devices to be controlled, the cooling demand of the device to be controlled is the sum of the sub-cooling demands of each device.

[0147] In step 208, the number of target refrigeration devices is determined based on the refrigeration requirements of the device to be controlled, and it is determined whether the number of target refrigeration devices is one.

[0148] The target refrigeration equipment is the refrigeration equipment that controls the temperature of the equipment to be controlled.

[0149] If there is only one target refrigeration device, proceed directly to step 209. If there are multiple target refrigeration devices, proceed directly to step 210.

[0150] In step 209, a target refrigeration device is started, and refrigeration capacity is allocated to the device to be controlled based on its weight. The compressor in the target refrigeration device can be a magnetic levitation compressor (speed range 3000-8000 rpm). Step 213 is then executed directly.

[0151] In step 210, it is determined whether the maximum cooling capacity generated by all target refrigeration equipment when running at maximum compressor speed is greater than or equal to the cooling demand of the equipment to be controlled.

[0152] If the maximum cooling capacity is greater than or equal to the cooling demand of the device to be controlled, then proceed to step 211; if the maximum cooling capacity is less than the cooling demand of the device to be controlled, then proceed directly to step 212.

[0153] In step 211, multiple target refrigeration devices are activated, and a corresponding refrigeration capacity is allocated to each device to be controlled based on the total refrigeration capacity of the multiple target refrigeration devices and the weight of each device to be controlled. Step 213 is then executed directly thereafter.

[0154] The total cooling capacity of multiple target refrigeration units can be composed of the cooling capacity generated by all target refrigeration units operating at the optimal energy efficiency compressor speed, or it can be composed of the cooling capacity generated by all target refrigeration units operating at the maximum compressor speed, or it can be composed of the cooling capacity generated by a portion of the target refrigeration units operating at the optimal energy efficiency compressor speed and another portion of the target refrigeration units operating at the maximum compressor speed.

[0155] In step 212, cooling capacity sufficient to meet the cooling needs of the highest priority controlled device is allocated, while the cooling capacity allocated to non-highest priority controlled devices is reduced. A request to reduce the charging current is sent to the controller of the non-highest priority controlled devices. Step 213 is then executed directly.

[0156] In step 213, the target refrigeration equipment controls the compressor speed based on the optimal compressor speed or the maximum compressor speed, and controls the expansion valve opening, water pump flow rate and proportional valve opening based on the compressor speed.

[0157] The compressor speed range in the target refrigeration equipment is 3000-12000 rpm, the expansion valve opening adjustment step is 0.1 mm, the water pump flow rate is used to control the water flow rate of the target refrigeration equipment per minute, and the proportional valve opening is used to control the water flow rate into each device to be controlled.

[0158] In step 214, the coefficient of performance of each target refrigeration device and the temperature difference between the inlet and outlet of the battery of each device to be controlled are monitored.

[0159] In step 215, it is determined whether the coefficient of performance of each target refrigeration device and the temperature difference of the battery of each device to be controlled meet the standards.

[0160] If the coefficient of performance of each target refrigeration device and the temperature difference of the battery of each controlled device meet the requirements, then proceed directly to step 217. If the coefficient of performance of a target refrigeration device does not meet the requirements, or the temperature difference of the battery of a controlled device does not meet the requirements, then proceed directly to step 216.

[0161] If the coefficient of performance (COP) of the target refrigeration equipment is less than the preset COP threshold, it indicates that the COP of the target refrigeration equipment is substandard. Similarly, if the temperature difference of the battery in the controlled device is greater than the preset temperature threshold, it indicates that the temperature difference of the battery in the controlled device is substandard. The preset COP threshold is 3.2, and the preset temperature threshold is 8°C.

[0162] In step 216, the target refrigeration equipment is adjusted based on the non-compliance.

[0163] If the coefficient of performance of the target refrigeration equipment does not meet the standard, the opening of the expansion valve of the target refrigeration equipment is adjusted according to the actual compressor speed of the target refrigeration equipment. If the temperature difference of the battery of the device to be controlled does not meet the standard, the cooling capacity allocated to the device to be controlled is increased.

[0164] In step 217, the coefficient of performance of each target refrigeration device and the temperature difference of the battery of each device to be controlled are continuously monitored.

[0165] In step 218, thermal management ends in response to the completion of charging of the controlled device.

[0166] In the above embodiments, the cooling requirements of the device under control are determined based on the heat of the device itself and the ambient heat, providing feasibility for accurate thermal management of the device under control during the subsequent charging process. Based on the cooling requirements of the device under control, the number of target cooling devices for temperature control of the device under control among multiple cooling devices is determined, providing feasibility for efficient thermal management of the device under control during the subsequent charging process, and providing technical support for temperature control when charging the device under control with high charging power. By controlling the temperature of the device under control based on the target cooling capacity of each target cooling device, the safety and charging efficiency of the charging process of the device under control are improved, and the risk of charging efficiency decrease or charging interruption caused by battery overheating of the device under control is reduced.

[0167] Figure 3 Schematic diagrams illustrating some embodiments of the thermal management apparatus of this disclosure.

[0168] like Figure 3 As shown, the thermal management device 30 includes a first determining unit 31, a second determining unit 32, a third determining unit 33, and a control unit 34.

[0169] The first determining unit 31 is configured to determine the cooling requirements of the device to be controlled based on the device's own heat and the ambient heat.

[0170] The second determining unit 32 is configured to determine the number of target refrigeration devices for temperature control of the device to be controlled among multiple refrigeration devices based on the refrigeration requirements of the device to be controlled.

[0171] The third determining unit 33 is configured to determine the target cooling capacity of each target refrigeration device when there are multiple target refrigeration devices for temperature control of the controlled device.

[0172] The control unit 34 is configured to perform temperature control on the device to be controlled based on the target cooling capacity of each target refrigeration device.

[0173] In the above embodiments, the cooling requirements of the device under control are determined based on the heat of the device itself and the ambient heat, providing feasibility for accurate thermal management of the device under control during the subsequent charging process. Based on the cooling requirements of the device under control, the number of target cooling devices for temperature control of the device under control among multiple cooling devices is determined, providing feasibility for efficient thermal management of the device under control during the subsequent charging process, and providing technical support for temperature control when charging the device under control with high charging power. By controlling the temperature of the device under control based on the target cooling capacity of each target cooling device, the safety and charging efficiency of the charging process of the device under control are improved, and the risk of charging efficiency decrease or charging interruption caused by battery overheating of the device under control is reduced.

[0174] In some embodiments, when there are multiple devices to be controlled, the first determining unit 31 is further configured to determine the sub-cooling requirement of each device to be controlled based on the body heat, ambient heat and interference heat of each device to be controlled, wherein, for each device to be controlled, the interference heat includes: the body heat of the devices to be controlled excluding the device to be controlled and the interference heat of the devices to be controlled; and the cooling requirement of the multiple devices to be controlled is determined based on the sub-cooling requirement of each device to be controlled.

[0175] In some embodiments, the control unit 34 is further configured to determine a first total cooling capacity of a plurality of target cooling devices based on the target cooling capacity of each target cooling device; and to determine a first cooling capacity allocated to each target cooling device based on the first total cooling capacity and the weight of each device to be controlled.

[0176] In some embodiments, the third determining unit 33 is further configured to determine a first target cooling capacity of each target cooling device based on the optimal compressor speed of each target cooling device; determine a second total cooling capacity of a plurality of target cooling devices based on the first target cooling capacity of each target cooling device; and determine the first target cooling capacity of each target cooling device as the target cooling capacity of each target cooling device if the second total cooling capacity is greater than or equal to the cooling demand.

[0177] In some embodiments, the third determining unit 33 is further configured to, when the second total cooling capacity is less than the cooling demand, determine a first target cooling device operating at maximum compressor speed and a second target cooling device operating at optimal energy efficiency compressor speed based on the cooling demand, the second cooling capacity generated by each target cooling device operating at maximum compressor speed, and the third cooling capacity generated by each target cooling device operating at optimal energy efficiency compressor speed; and take the second cooling capacity generated by each cooling device in the first target cooling device operating at maximum compressor speed as the target cooling capacity of each cooling device in the first target cooling device, and take the third cooling capacity generated by each cooling device in the second target cooling device operating at optimal energy efficiency compressor speed as the target cooling capacity of each cooling device in the second target cooling device.

[0178] In some embodiments, when it is determined that multiple target refrigeration devices are all operating at maximum compressor speed, the control unit 34 is further configured to assign a priority to each target device according to the urgency of its task; to allocate a fourth cooling capacity to the highest priority target device according to its weight, wherein the fourth cooling capacity is equal to the cooling demand of the highest priority target device; and in response to the third total cooling capacity of the multiple target refrigeration devices being greater than the cooling demand of the highest priority target device, to allocate a fifth cooling capacity (excluding the fourth cooling capacity allocated to the highest priority target device) from the third total cooling capacity to the non-highest priority target devices in descending order of priority, wherein the third total cooling capacity is determined based on the second target cooling capacity of each target refrigeration device, the second target cooling capacity of each target refrigeration device is determined based on the maximum compressor speed of the target refrigeration device, and the third total cooling capacity is less than the cooling demand.

[0179] In some embodiments, the control unit 34 is further configured to reduce the charging current of non-highest priority controlled devices when the third total cooling capacity does not meet the cooling demand.

[0180] In some embodiments, the second determining unit 32 is further configured to determine the optimal compressor speed corresponding to the peak region of the coefficient of performance of each refrigeration device based on the motor efficiency characteristics of each refrigeration device, the refrigerant type of each refrigeration device, and the ambient heat; when the cooling demand is less than or equal to the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed, the number of target refrigeration devices for temperature control of the device under control is determined to be one; when the cooling demand is greater than the sixth cooling capacity generated by any refrigeration device operating at the optimal compressor speed, the number of target refrigeration devices for temperature control of the device under control is determined to be multiple.

[0181] In some embodiments, the second determining unit 32 is further configured to determine the fourth total cooling capacity generated when all refrigeration devices operate at maximum compressor speed; and when the cooling demand is greater than the fourth total cooling capacity, to determine the number of target refrigeration devices for temperature control of the device to be controlled among the multiple refrigeration devices as the number of all refrigeration devices.

[0182] In some embodiments, the first determining unit 31 is further configured to determine the weight of each device to be controlled based on the battery temperature, state of charge, and charging current of the device to be controlled.

[0183] In some embodiments, the first determining unit 31 is further configured to determine the temperature weight of the device to be controlled based on the temperature coefficient, battery temperature, target temperature, and the maximum temperature value of the device to be controlled; determine the state of charge weight of the device to be controlled based on the state of charge coefficient, state of charge, and the maximum state of charge value of the device to be controlled; determine the charging current weight of the device to be controlled based on the charging current coefficient, charging current, and the maximum charging current value of the device to be controlled; and determine the weight of the device to be controlled based on the temperature weight, state of charge weight, and charging current weight.

[0184] In some embodiments, the temperature weight is proportional to the battery temperature, the state of charge weight is proportional to the state of charge, and the charging current weight is proportional to the charging current.

[0185] In some embodiments, the thermal management device 30 further includes a monitoring unit configured to monitor the performance coefficient of each target refrigeration device; identify target refrigeration devices with performance coefficients less than a preset performance coefficient threshold as refrigeration devices to be adjusted; and adjust the opening of the expansion valve of the refrigeration device to be adjusted according to the actual compressor speed of the refrigeration device to be adjusted.

[0186] In some embodiments, the heat of the device body is determined based on the charging current of the device to be controlled and the internal resistance of the battery, and the internal resistance of the battery is directly proportional to the battery temperature and state of charge of the device to be controlled; the heat of the environment is determined based on the heat exchange coefficient and the difference between the battery temperature and the ambient temperature of the environment in which the device to be controlled is located.

[0187] Figure 4 Schematic diagrams showing other embodiments of the thermal management apparatus of this disclosure are provided.

[0188] like Figure 4 As shown, the thermal management device 30 of this embodiment includes a memory 41 and a processor 42 coupled to the memory 41. The processor 42 is configured to execute the thermal management method of any of the foregoing embodiments based on instructions stored in the memory 41.

[0189] The memory 41 may include, for example, system memory, fixed non-volatile storage media, etc. The system memory stores, for example, the operating system, application programs, boot loader, and other programs.

[0190] The thermal management device 30 may also include an input / output interface 43, a network interface 44, and a storage interface 45. These interfaces 43, 44, and 45, as well as the memory 41 and processor 42, can be connected via, for example, a bus 46. The input / output interface 43 provides a connection interface for input / output devices such as monitors, mice, keyboards, touchscreens, microphones, and speakers. The network interface 44 provides a connection interface for various networked devices. The storage interface 45 provides a connection interface for external storage devices such as SD cards and USB flash drives.

[0191] In the above embodiments, the cooling requirements of the device under control are determined based on the heat of the device itself and the ambient heat, providing feasibility for accurate thermal management of the device under control during the subsequent charging process. Based on the cooling requirements of the device under control, the number of target cooling devices for temperature control of the device under control among multiple cooling devices is determined, providing feasibility for efficient thermal management of the device under control during the subsequent charging process, and providing technical support for temperature control when charging the device under control with high charging power. By controlling the temperature of the device under control based on the target cooling capacity of each target cooling device, the safety of the charging process of the device under control is improved (keeping the temperature of the battery of the device under control between 25°C and 35°C, and keeping the temperature difference between the water inlet and outlet of the battery below 3°C) and the charging efficiency (maintaining approximately 95%) are improved, reducing the risk of decreased charging efficiency or charging interruption due to battery overheating of the device under control.

[0192] Figure 5 Schematic diagrams illustrating some embodiments of the thermal management system of this disclosure are shown.

[0193] like Figure 5 As shown, the thermal management system 50 includes a thermal management device 30 and a thermal management loop 51 in any of the above embodiments.

[0194] In the above embodiments, the cooling requirements of the device under control are determined based on the heat of the device itself and the ambient heat, providing feasibility for accurate thermal management of the device under control during the subsequent charging process. Based on the cooling requirements of the device under control, the number of target cooling devices for temperature control of the device under control among multiple cooling devices is determined, providing feasibility for efficient thermal management of the device under control during the subsequent charging process, and providing technical support for temperature control when charging the device under control with high charging power. By controlling the temperature of the device under control based on the target cooling capacity of each target cooling device, the safety and charging efficiency of the charging process of the device under control are improved, and the risk of charging efficiency decrease or charging interruption caused by battery overheating of the device under control is reduced.

[0195] In some embodiments, the thermal management circuit 51 includes multiple refrigeration circuit segments, each including multiple target refrigeration devices, wherein the multiple refrigerant circuit segments and the multiple target refrigeration devices correspond one-to-one; a heat dissipation circuit segment connected to the first end of the multiple refrigeration circuit segments, the heat dissipation circuit being configured to dissipate heat generated by the multiple refrigeration circuit segments; and multiple sets of interfaces, the first end of the multiple sets of interfaces being connected to the second end of the multiple refrigeration circuit segments, the second end of the multiple sets of interfaces being connected to the water inlet of the battery of the device to be controlled, and the third end of the multiple sets of interfaces being connected to the water outlet of the battery of the device to be controlled.

[0196] By connecting to multiple controlled devices through multiple interfaces, the thermal management system can provide cooling capacity and perform thermal management for multiple controlled devices, thereby improving the utilization rate of the target cooling equipment (by 200%). Furthermore, by setting up multiple cooling loop segments, it helps to provide relatively sufficient cooling capacity (over 300kW) for the controlled devices, improves safety during high-power charging of the controlled devices, and allows other cooling loop segments to continue thermal management even if one cooling loop segment fails, increasing the reliability of the thermal management system.

[0197] By highly integrating multiple cooling loops, heat dissipation loops, and multiple sets of interfaces, thermal management of multiple controlled devices is achieved, solving the problems of high energy consumption and low integration in distributed architectures, where a thermal management system is set up in each controlled device. Compared to distributed architectures, the highly integrated architecture reduces the number of loops (by approximately 60%), lowers the cost of the thermal management system (by approximately 25%), improves the protection level of key components of the thermal management system (IP67), reduces the failure rate of the thermal management system (by approximately 30%), and extends the maintenance cycle of the thermal management system (from 300 hours to 450 hours).

[0198] Figure 6 Schematic diagrams illustrating some embodiments of the thermal management circuit of this disclosure are shown.

[0199] like Figure 6 As shown, the thermal management loop includes multiple cooling loop segments, heat dissipation loop segments, and multiple sets of interfaces. The following explanation uses two cooling loop segments (the first cooling loop segment and the second cooling loop segment) and three sets of interfaces (the first set of interfaces, the second set of interfaces, and the third set of interfaces) as an example.

[0200] The first refrigeration circuit section includes an electric compressor 601, a chiller (or plate heat exchanger) 602, an expansion valve 603, and a water-cooled condenser 604. The second refrigeration circuit section includes an electric compressor 605, a chiller (or plate heat exchanger) 606, an expansion valve 607, and a water-cooled condenser 608. Chillers 602 and 606 are connected in parallel for cooling output.

[0201] The special structure of the water-cooled condenser, namely the large spacing between the heat dissipation fins, makes it less prone to dust accumulation, enabling it to cope with high-dust working environments and improving the feasibility of applying the thermal management system to mining work environments.

[0202] For example, electric compressors 601 and 605 employ magnetic levitation centrifugal compressors (i.e., high-efficiency, large-displacement compressors), which have a high energy efficiency ratio. Alternatively, electric compressors can also be high-efficiency screw compressors, suitable for cost-sensitive small-scale mining environments. Furthermore, the number and speed of electric compressors can be determined based on the cooling requirements of the controlled equipment, ensuring that the electric compressors operate within their high-efficiency range as much as possible.

[0203] The electric compressor adopts a magnetic levitation centrifugal compressor and an integrated circuit (i.e., a cooling circuit section and a heat dissipation circuit section). The efficiency of the thermal management system under charging conditions is improved by more than 30%, and the unit cooling energy consumption is reduced by 40%-50% (for example, the cooling energy consumption of a 200-ton electric mining dump truck under fast charging conditions is reduced from 0.3kWh / kWh to 0.15-0.18kWh / kWh).

[0204] The heat dissipation circuit section includes a radiator 609, a water collector 620, a water collector 611, a high-pressure electric water pump 612, an expansion tank 613, and a high-pressure electric fan 614. The heat from the water-cooled condenser 604 in the first refrigeration circuit section and the water-cooled condenser 608 in the second refrigeration circuit section is carried to the radiator 609 by the coolant and dissipated into the environment by the high-pressure electric fan 614.

[0205] Forced cooling is achieved by using a high-voltage electric fan in a heat dissipation circuit section connected to the first end of multiple cooling circuit sections, thereby improving the reliability of the thermal management system for long-term operation in harsh environments.

[0206] For example, radiator 609 can be a finned radiator. If the ambient temperature is higher than 60°C, radiator 609 can be replaced with a microchannel radiator, and a high-voltage electric fan can be added to enhance the heat dissipation capacity in extreme environments.

[0207] The first set of interfaces includes a first water inlet interface 615 and a first water outlet interface 616; the second set of interfaces includes a second water inlet interface 617 and a second water outlet interface 618; and the third set of interfaces includes a third water inlet interface 619 and a third water outlet interface 620. These interfaces can be self-sealing quick-connect fittings, which are sealed when not in use. When in use, the corresponding interface of the device to be controlled is plugged into one of these interfaces to form a connection for thermal management.

[0208] The first water inlet 615, the second water inlet 617, and the third water inlet 619 need to be connected to the water outlet of the battery of different devices to be controlled. Similarly, the first water outlet 616, the second water outlet 618, and the third water outlet 620 need to be connected to the water inlet of the battery of different devices to be controlled. The first water inlet 615 and the first water outlet 616 are connected to the same device to be controlled (i.e., the first water inlet 615 and the first water outlet 616 are used in pairs). The second water inlet 617 and the second water outlet 618 are connected to the same device to be controlled (i.e., the second water inlet 617 and the second water outlet 618 are used in pairs). The third water inlet 619 and the third water outlet 620 are connected to the same device to be controlled (i.e., the third water inlet 619 and the third water outlet 620 are used in pairs). The number of multiple sets of interfaces corresponds to the number of devices to be controlled.

[0209] In addition, the thermal management system also includes a docking loop section, which includes a water collector 621, a water collector 622, a high-pressure electronic water pump 623, an expansion tank 624, and a water collector 625. The device to be controlled can be connected to the first refrigeration loop section and the second refrigeration loop section through the docking loop section and multiple sets of interfaces.

[0210] The water collectors 621 and 622 in the docking loop section have built-in proportional solenoid valves. The proportional solenoid valves are used to adjust the flow rate with precision. According to the cooling capacity allocated to each controlled device, the flow rate of the coolant in each controlled device is adjusted by the proportional solenoid valves. The coolant can be a mixture of ethylene glycol and water.

[0211] If the ambient temperature is relatively low, for example, in the temperature range of -5℃ to 35℃, a heating circuit section (positive temperature coefficient (PTC) heating module) and a three-way valve can be added. The three-way valve can be set between water collectors 621 and 622. The heating circuit section is connected in parallel with two chillers. When heating is required, the three-way valve switches to the heating circuit section. When cooling is required, the three-way valve switches to the chiller, realizing integrated management of battery low-temperature heating and battery high-temperature cooling.

[0212] The following is combined Figure 6 The specific cooling process is described using a device under control with a set of interfaces for thermal management as an example, specifically the first water inlet interface 615 and the first water outlet interface 616, as follows.

[0213] The controlled equipment transfers high-temperature coolant to chillers 602 and 606 through the first water inlet 615 and the water collector 621 (which controls the flow rate of the high-temperature coolant according to the cooling capacity allocated to the controlled equipment). A portion of the high-temperature coolant is transferred to chiller 602, and another portion to chiller 606. Chillers 602 and 606 cool the high-temperature coolant using a low-temperature, low-pressure refrigerant (a mixture of gas and liquid). (This can also be described as heat exchange between the low-temperature, low-pressure refrigerant and the high-temperature coolant.) The low-temperature, low-pressure refrigerant in chiller 602 originates from water-cooled condenser 604 (which transfers the low-temperature, low-pressure refrigerant to the power transmission unit 602 via expansion valve 603), and the low-temperature, low-pressure refrigerant in chiller 606 originates from water-cooled condenser 608 (which transfers the low-temperature, low-pressure refrigerant to the power transmission unit 606 via expansion valve 607).

[0214] Chillers 602 and 606 transfer the cooled coolant through collector 625 to the first outlet port 616, thus delivering the cooled coolant to the battery inlet of the controlled device for thermal management. Collector 625 controls the flow rate of coolant to the first outlet port 616 based on the allocated cooling capacity for each controlled device. Expansion tank 624 adds coolant to the docking circuit section, and high-pressure electric water pump 623 circulates the coolant within the docking circuit section.

[0215] After chillers 602 and 606 cool the high-temperature coolant with low-temperature, low-pressure refrigerant, a high-temperature, low-pressure refrigerant (gas) is obtained. Chiller 602 transfers the high-temperature, low-pressure refrigerant to electric compressor 601, and chiller 606 transfers it to electric compressor 605. Subsequently, electric compressors 601 and 605 compress the high-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant (gas). Electric compressor 601 then transfers the high-temperature, high-pressure refrigerant to water-cooled condenser 604, and electric compressor 605 transfers it to water-cooled condenser 608 to obtain a low-temperature, low-pressure refrigerant.

[0216] Water-cooled condensers 604 and 608 use a coolant at a lower temperature to cool the high-temperature, high-pressure refrigerant, thereby obtaining a low-temperature, low-pressure refrigerant.

[0217] After the water-cooled condensers 604 and 608 cool the high-temperature, high-pressure refrigerant with lower-temperature coolant, a higher-temperature coolant is obtained. These condensers transfer this higher-temperature coolant to the collector 610, which then transfers it to the radiator 609 for further cooling by a high-pressure electric fan. After cooling, the radiator 609 transfers the cooled coolant to the collector 611, which in turn transfers it back to the water-cooled condensers 604 and 608 for further cooling of the high-temperature, high-pressure refrigerant. The expansion tank 613 adds coolant to the heat dissipation circuit, and the high-pressure electric water pump 612 circulates the coolant within the heat dissipation circuit.

[0218] In some embodiments, a computer program product is protected, comprising a computer program or instructions that, when executed by a processor, implement the thermal management method described above. The computer program product includes a computer program carried on a computer-readable medium, containing program code for performing the methods shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network via a thermal management device, or installed from a storage device, or installed from ROM. When the computer program is executed by a CPU, it performs the functions defined in the methods of embodiments of this disclosure.

[0219] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0220] The thermal management methods, apparatus, systems, and procedures of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0221] The methods and systems of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0222] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A thermal management method, comprising: Determining the cooling requirements of the controlled device based on its own heat and ambient heat includes: when there are multiple controlled devices, determining the sub-cooling requirements of each controlled device based on its own heat, the ambient heat, and interference heat, wherein, for each controlled device, the interference heat includes: interference heat from the own heat of the controlled devices other than the controlled device itself on the controlled device; determining the cooling requirements of the multiple controlled devices based on the sub-cooling requirements of each controlled device, wherein the ambient heat is determined based on the heat exchange coefficient and the difference between the battery temperature of the controlled device and the ambient temperature of the environment in which the controlled device is located; Based on the cooling requirements of the device to be controlled, determine the number of target refrigeration devices that perform temperature control on the device to be controlled among multiple refrigeration devices; When there are multiple target refrigeration devices for temperature control of the device to be controlled, the target cooling capacity of each target refrigeration device is determined. Temperature control is performed on the device to be controlled based on the target cooling capacity of each target refrigeration device.

2. The thermal management method according to claim 1, wherein, The temperature control of the device to be controlled based on the target cooling capacity of each target refrigeration device includes: Based on the target cooling capacity of each target refrigeration device, a first total cooling capacity of the plurality of target refrigeration devices is determined; Based on the first total cooling capacity and the weight of each device to be controlled, a first cooling capacity is determined for each device to be controlled.

3. The thermal management method according to any one of claims 1 to 2, wherein, Determining the target cooling capacity for each target refrigeration device includes: The first target cooling capacity of each target refrigeration device is determined based on the optimal compressor speed for each target refrigeration device. Based on the first target cooling capacity of each target refrigeration device, determine the second total cooling capacity of the plurality of target refrigeration devices; When the second total cooling capacity is greater than or equal to the cooling demand, the first target cooling capacity of each target cooling device is determined as the target cooling capacity of each target cooling device.

4. The thermal management method according to claim 3, wherein, Determining the target cooling capacity of each target refrigeration device also includes: When the second total cooling capacity is less than the cooling demand, based on the cooling demand, the second cooling capacity generated by each target cooling device operating at the maximum compressor speed and the third cooling capacity generated by operating at the optimal energy efficiency compressor speed, a first target cooling device operating at the maximum compressor speed and a second cooling device operating at the optimal energy efficiency compressor speed are determined. The second cooling capacity generated by each refrigeration device in the first target refrigeration device operating at the maximum compressor speed is taken as the target cooling capacity of each refrigeration device in the first target refrigeration device, and the third cooling capacity generated by each refrigeration device in the second target refrigeration device operating at the optimal energy efficiency compressor speed is taken as the target cooling capacity of each refrigeration device in the second target refrigeration device.

5. The thermal management method according to claim 4, wherein, When it is determined that all the target refrigeration devices are operating at the maximum compressor speed, the temperature control of the device to be controlled based on the target cooling capacity of each target refrigeration device includes: Assign a priority to each device to be controlled according to the urgency of its task; For the highest priority device to be controlled, a fourth cooling capacity is allocated to the highest priority device to be controlled according to the weight of the highest priority device to be controlled, wherein the fourth cooling capacity is equal to the cooling demand of the highest priority device to be controlled. In response to the fact that the third total cooling capacity of the plurality of target refrigeration devices is greater than the cooling demand of the highest priority controllable device, the fifth cooling capacity, excluding the fourth cooling capacity allocated to the highest priority controllable device, is allocated to the non-highest priority controllable devices in descending order of priority. The third total cooling capacity is determined based on the second target cooling capacity of each target refrigeration device, and the second target cooling capacity of each target refrigeration device is determined based on the maximum compressor speed of the target refrigeration device. The third total cooling capacity is less than the cooling demand.

6. The thermal management method according to claim 5, wherein, The temperature control of the device under control based on the target cooling capacity of each target refrigeration device further includes: If the third total cooling capacity does not meet the cooling demand, the charging current of the non-highest priority controlled device shall be reduced.

7. The thermal management method according to any one of claims 1 to 2, wherein, The step of determining the number of target refrigeration devices for temperature control of the device under control from among multiple refrigeration devices, based on the refrigeration requirements of the device under control, includes: Based on the motor efficiency characteristics of each of the plurality of refrigeration devices, the refrigerant type of each of the refrigeration devices, and the ambient heat, determine the optimal compressor speed for energy efficiency corresponding to the peak region of the coefficient of performance of each refrigeration device. When the cooling demand is less than or equal to the sixth cooling capacity generated by any of the plurality of cooling devices operating at the optimal energy efficiency compressor speed, the number of target cooling devices that perform temperature control on the device to be controlled among the plurality of cooling devices is determined to be one. When the cooling demand is greater than the sixth cooling capacity generated by any one of the plurality of cooling devices operating at the optimal compressor speed, the number of target cooling devices for temperature control of the device to be controlled is determined to be multiple.

8. The thermal management method according to claim 7, wherein, The determination that the number of target refrigeration devices for temperature control of the device to be controlled among the plurality of refrigeration devices includes: Determine the fourth total cooling capacity generated when all refrigeration equipment operates at maximum compressor speed; When the cooling demand is greater than the fourth total cooling capacity, the number of target cooling devices that perform temperature control on the device to be controlled among the plurality of cooling devices is determined to be the total number of all cooling devices.

9. The thermal management method according to claim 2, further comprising: For each device to be controlled, the weight of the device to be controlled is determined based on the battery temperature, state of charge, and charging current of the device to be controlled.

10. The thermal management method according to claim 9, wherein, The step of determining the weight of the device to be controlled based on its battery temperature, state of charge, and charging current includes: The temperature weight of the device to be controlled is determined based on the temperature coefficient, the battery temperature, the target temperature, and the maximum temperature of the device to be controlled. The weight of the state of charge of the device to be controlled is determined based on the state of charge coefficient, the state of charge, and the maximum value of the state of charge of the device to be controlled. The charging current weight of the device to be controlled is determined based on the charging current coefficient, the charging current, and the maximum charging current of the device to be controlled. The weight of the device to be controlled is determined based on the temperature weight, the state of charge weight, and the charging current weight.

11. The thermal management method according to claim 10, wherein, The temperature weight is directly proportional to the battery temperature, the state of charge weight is directly proportional to the state of charge, and the charging current weight is directly proportional to the charging current.

12. The thermal management method according to any one of claims 1 to 2, further comprising: Monitor the coefficient of performance (COP) of each target refrigeration device; Refrigeration equipment with a performance coefficient less than a preset performance coefficient threshold is designated as the refrigeration equipment to be adjusted. Adjust the opening degree of the expansion valve of the refrigeration equipment to be adjusted according to the actual compressor speed of the refrigeration equipment to be adjusted.

13. The thermal management method according to any one of claims 1 to 2, wherein, The heat generated by the main body is determined based on the charging current of the device to be controlled and the internal resistance of the battery. The internal resistance of the battery is directly proportional to the battery temperature and state of charge of the device to be controlled.

14. A thermal management device, comprising: The first determining unit is configured to determine the cooling requirement of the device to be controlled based on the device's own heat and the ambient heat, including: when there are multiple devices to be controlled, determining the sub-cooling requirement of each device to be controlled based on the device's own heat, the ambient heat, and interference heat, wherein, for each device to be controlled, the interference heat includes: interference heat from the device's own heat to the device to be controlled by the devices other than the device to be controlled; determining the cooling requirement of the multiple devices to be controlled based on the sub-cooling requirement of each device to be controlled, wherein the ambient heat is determined based on the heat exchange coefficient and the difference between the battery temperature of the device to be controlled and the ambient temperature of the environment in which the device to be controlled is located; The second determining unit is configured to determine the number of target refrigeration devices that perform temperature control on the device under control among a plurality of refrigeration devices, based on the refrigeration requirements of the device under control. The third determining unit is configured to determine the target cooling capacity of each target cooling device when there are multiple target cooling devices for temperature control of the device to be controlled. The control unit is configured to perform temperature control on the device to be controlled based on the target cooling capacity of each target refrigeration device.

15. A thermal management device, comprising: Memory; and A processor coupled to the memory, the processor being configured to execute the thermal management method of any one of claims 1 to 13 based on instructions stored in the memory.

16. A thermal management system, comprising: The thermal management device as described in claim 14 or 15; Thermal management circuit.

17. The thermal management system according to claim 16, wherein, The thermal management circuit includes: Multiple refrigeration circuit segments, including multiple target refrigeration devices, wherein the multiple refrigeration circuit segments and the multiple target refrigeration devices correspond one-to-one; A heat dissipation circuit section is connected to the first end of the plurality of cooling circuit sections, and the heat dissipation circuit section is configured to dissipate the heat generated by the plurality of cooling circuit sections. The device has multiple interfaces, with the first end of each interface connected to the second end of the multiple refrigeration circuit segments, the second end of each interface connected to the water inlet of the battery of the device to be controlled, and the third end of each interface connected to the water outlet of the battery of the device to be controlled.

18. The thermal management system according to claim 16 or 17, further comprising: The sensor is configured to acquire the battery internal resistance, charging current, and battery temperature of the device to be controlled.

19. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the thermal management method according to any one of claims 1 to 13.

20. A computer program product comprising a computer program that, when executed by a processor, implements the thermal management method according to any one of claims 1 to 13.

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