Thermal management system and energy storage device

Abstract

The invention relates to the technical field of batteries, and provides a heat management system and an energy storage device, and the heat management system comprises a refrigerant unit, a control device, a heat dissipation air duct and a condensation fan. The refrigerant unit comprises a condenser; the control device comprises a control module and a heat dissipation piece, and the control module can transfer heat to the heat dissipation piece; at least part of the heat dissipation piece is located in the heat dissipation air channel. The condensation fan is used for driving airflow to flow through the condenser and the heat dissipation air duct, the condenser and the heat dissipation air duct are both located on the upstream of the condensation fan in the airflow flowing direction, the condensation fan comprises a wind wheel and a wind guide shell, at least part of the wind wheel is located in the wind guide shell, and a heat dissipation outlet of the heat dissipation air duct communicates with the wind guide shell. The heat dissipation air channel and the condenser share the condensate fan to generate a forced air cooling effect, so that air flow takes away heat of the heat dissipation piece and the condenser. The control module dissipates heat through a condensation fan of the condenser, and the control device can achieve heat dissipation without additionally arranging an impeller used for driving airflow of the heat dissipation air channel to flow.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a thermal management system and an energy storage device. Background Art

[0002] Battery cells can be used to store or provide electrical energy. Battery cells can be used in electrical equipment. For example, battery cells can be used in vehicles or energy storage devices, etc.

[0003] In the related art, a thermal management system is used to adjust the temperature of a battery cell. The thermal management system includes a control device. The electronic components of the control device generate heat during operation. Therefore, the control device has a heat dissipation requirement. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide a thermal management system and an energy storage device, in which the heat dissipation duct and the condenser share a condensing fan to produce a forced air cooling effect, so that the airflow takes away the heat of the heat dissipation element and the condenser.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows: The present application provides a thermal management system, including: Refrigerant unit, including condenser; A control device, comprising a control module and a heat sink, wherein the heat sink is used to dissipate heat from the control module; a heat dissipation duct, wherein at least a portion of the heat dissipation element is disposed in the heat dissipation duct; The condensing fan is used to drive the air flow through the condenser and the heat dissipation duct. The condenser and the heat dissipation duct are both located upstream of the condensing fan along the air flow direction. The condensing fan includes a wind wheel and an air guide shell. At least part of the wind wheel is located in the air guide shell. The heat dissipation outlet of the heat dissipation duct is connected to the air guide shell.

[0006] The thermal management system provided in the embodiment of the present application sets at least part of the heat sink in the heat dissipation duct. The heat dissipation duct and the condenser share a condensing fan to produce a forced air cooling effect, so that the airflow takes away the heat of the heat sink and the condenser. The control module uses the condensing fan of the condenser to dissipate heat, and the control device does not need to add an additional impeller for driving the airflow in the heat dissipation duct to achieve heat dissipation, which can reduce the number of parts and components, not only reduce the failure rate of parts and the difficulty of maintenance, but also reduce production costs and maintenance costs. The rotation of the wind wheel can form a negative pressure in the air guide shell. The wind wheel rotates to drive the airflow of the heat dissipation duct to enter the air guide shell through the heat dissipation outlet, and then discharge through the air outlet of the air guide shell. The heat dissipation outlet of the heat dissipation duct is connected to the air guide shell, and the airflow is constrained by the heat dissipation duct and the air guide shell, which plays a rectifying role and improves efficiency.

[0007] In some embodiments, the control device includes a box body, the control module is disposed outside the box body, and the heat dissipation duct is disposed outside the box body.

[0008] In this embodiment, the control module is disposed in the box body, and the box body can protect the control module. The heat dissipation duct is disposed outside the box body, which can not only prevent the heat dissipation duct from occupying the limited space in the box body, but also improve the waterproof and dustproof performance of the box body, and to a certain extent prevent dust and / or other organisms from entering the box body through the heat dissipation duct.

[0009] In some embodiments, the thermal management system includes a cabinet, the condenser, the control device, the heat dissipation duct and the condensing fan are all located in the cabinet, the cabinet is formed with an exhaust port, and the air outlet of the condensing fan is connected to the exhaust port.

[0010] In this embodiment, the cabinet can provide protection for the condenser, the control device, the heat dissipation duct, the condensation fan and other components, thereby reducing the probability of an object or organism accidentally touching the above components. The airflow from the heat dissipation duct and the condenser can be discharged from the cabinet through the air outlet and the exhaust port to transfer heat to the environment outside the cabinet.

[0011] In some embodiments, the condensing fan is located above the control device.

[0012] In this embodiment, the space below the condensing fan is more open, and there is more sufficient space to place the control device. The position of the control device is relatively low, so as to facilitate the maintenance of the control device.

[0013] In some embodiments, the thermal management system includes a heat exchange unit and an evaporator, the heat exchange unit includes a heat exchange flow path for exchanging heat with a battery cell, the evaporator includes a refrigerant channel and a heat exchange channel capable of performing heat exchange, the refrigerant of the refrigerant unit flows through the refrigerant channel, and the heat exchange fluid of the heat exchange flow path flows through the heat exchange channel.

[0014] In this embodiment, the heat exchange fluid of the heat exchange unit flows through the heat exchange channel, and the refrigerant of the refrigerant unit flows through the refrigerant channel. The heat exchange fluid in the heat exchange channel and the refrigerant in the refrigerant channel can exchange heat. In this way, the heat exchange fluid and the battery cell exchange heat through the heat exchange flow path, and the heat exchange fluid and the refrigerant exchange heat through the evaporator, thereby realizing heat transfer among the heat exchange fluid, the refrigerant and the battery cell.

[0015] In some embodiments, the heat exchange unit includes a heater, and the heater is arranged in the heat exchange flow path to heat the heat exchange fluid.

[0016] In this embodiment, the heater is used to heat the heat exchange fluid in the heat exchange flow path. The heat exchange unit can heat the heat exchange fluid through the heater to increase the temperature of the battery cell and provide a heating function. The refrigerant unit can only be used to absorb the heat of the heat exchange fluid to reduce the temperature of the battery cell and provide a cooling function, but no longer provide a heating function. This design can simplify the structure of the refrigerant unit and simplify the control method of the refrigerant unit.

[0017] In some embodiments, the thermal management system has a cooling mode and a heating mode; In the cooling mode, the condensing fan and the condenser are both in operation, and the heater is in shutdown; In the heating mode, the condensing fan and the heater are both in operation, and the condenser is in shutdown.

[0018] In this embodiment, in the cooling mode, the condensing unit is used to achieve cooling, and the condensing fan is in operation to drive the airflow through the condenser and the heat dissipation duct, and the airflow can take away the heat of the refrigerant in the condenser and the heat dissipation element. In the heating mode, the heat exchange unit is used to achieve heating, and the condensing fan is in operation to drive the airflow through the heat dissipation duct, and the airflow can take away the heat of the heat dissipation element.

[0019] In some embodiments, the heat exchange unit includes a power pump, which is arranged in the heat exchange flow path to drive the heat exchange fluid to flow, and the thermal management system has a self-circulation mode; In the self-circulation mode, the condensing fan and the power pump are both in operation, and the condenser and the heater are both in shutdown.

[0020] In this embodiment, in the self-circulation mode, the condensing unit does not provide cooling, and the heater does not provide heating, but uses the natural temperature difference between the heat exchange fluid and the battery cell to achieve heat exchange. The condensing fan is in operation to drive the air flow through the heat dissipation duct to achieve heat dissipation. Since the condenser and the heater are both in the shutdown state in the self-circulation mode, the heat generated by the control module is relatively smaller. Therefore, the speed of the condensing fan can be lower, reducing energy consumption while meeting the heat dissipation requirements.

[0021] In some embodiments, the control module includes a pump inverter, the pump inverter is used to adjust the operating frequency of the power pump, and the pump inverter is heat-transferably connected to the heat sink.

[0022] In this embodiment, the pump inverter generates heat during operation, and the pump inverter needs to be cooled to maintain stable operation. The pump inverter is heat-transferably connected to the heat sink, and the heat generated by the pump inverter can be conducted to the heat sink and then transferred to the airflow passing through the heat dissipation duct.

[0023] In some embodiments, the control module includes a fan inverter, which is used to adjust the operating frequency of the condensing fan, and the fan inverter is heat-conductingly connected to the heat sink.

[0024] In this embodiment, the fan inverter generates heat during operation, and needs to be cooled to maintain stable operation. The fan inverter is heat-transferably connected to the heat sink, and the heat generated by the fan inverter can be conducted to the heat sink and then transferred to the airflow passing through the heat dissipation duct.

[0025] In some embodiments, the refrigerant unit includes a compressor, the control module includes a compressor inverter, the compressor inverter is used to adjust the operating frequency of the compressor, and the compressor inverter is heat-transferably connected to the heat sink.

[0026] In this embodiment, the compressor inverter generates heat during operation, and the compressor inverter needs to be cooled to maintain stable operation. The compressor inverter is heat-transferably connected to the heat sink, and the heat generated by the compressor inverter can be conducted to the heat sink and then transferred to the airflow passing through the heat dissipation duct.

[0027] An embodiment of the present application also provides an energy storage device, comprising a cabinet, at least two battery devices and a thermal management system as described above, each of the battery devices comprising a battery cell, the cabinet having a battery compartment, the battery devices being accommodated in the battery compartment, and the thermal management system being used to regulate the temperature of the battery cells.

[0028] The energy storage device provided in the embodiment of the present application includes the thermal management system provided in the embodiment of the present application, and has the same or corresponding beneficial effects as the thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a thermal management system in one embodiment of the present application; Figure 2 for Figure 1 A cross-sectional schematic diagram of the heat management system, wherein the hollow arrows schematically show the flow direction of the airflow in the heat dissipation duct; Figure 3 Schematic diagram of the principle of a thermal management system in one embodiment of the present application.

[0030] Description of Reference Numerals 1. Refrigerant unit; 11. Condenser; 12. Compressor; 13. Throttling device; 14. Liquid storage tank; 2. Control device; 21. Heat sink; 22. Box body; 23. Control module; 3. Heat dissipation duct; 3a. Heat dissipation outlet; 4. Condensing fan; 41. Wind wheel; 42. Air guide shell; 5. Cabinet; 5a. Exhaust outlet; 6. Heat exchange unit; 61. Heat exchange flow path; 62. Heater; 63. Power pump; 7. Evaporator; 10. Battery cell. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] It should be noted that, in the present application, at least two includes a quantity of two and more than two. A plurality includes a quantity of two and more than two. The unit "r / min" is revolutions per minute. Upward refers to the direction toward the sky, and downward is opposite to upward, and downward is the direction toward the ground, wherein upward is represented by X1 and downward is represented by X2.

[0036] See also Figure 3 To facilitate understanding of the battery cell 10, battery device, and electrical equipment provided in the embodiment of the present application, some basic structures of the battery cell 10, battery device, and electrical equipment provided in the embodiment of the present application are first introduced.

[0037] The battery device provided by the embodiment of the present application includes the battery cell 10 in any one of the embodiments of the present application.

[0038] The number of battery cells 10 can be one or more, and the battery cells 10 are used to provide voltage and capacity. Multiple battery cells 10 can be connected in series, in parallel, or in mixed series through a busbar component. The busbar component is used to achieve electrical connection between at least two battery cells 10.

[0039] Exemplarily, hybrid connection means that at least two battery cells 10 are both connected in series and in parallel. At least two battery cells 10 can be directly connected in series, in parallel, or in hybrid connection; of course, at least two battery cells 10 can be first connected in series, in parallel, or in hybrid connection to form a module, and the module can then be connected in series, in parallel, or in hybrid connection to form a whole.

[0040] In the embodiment of the present application, the battery cell 10 may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0041] The battery cell 10 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell or a lead-acid battery cell, etc., which is not limited in the embodiments of the present application.

[0042] The battery cell 10 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, and the separator is arranged between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through.

[0043] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0044] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0045] In some embodiments, the electrode assembly is a laminate structure.

[0046] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0047] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0048] In some embodiments, the battery cell 10 may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, when the outer shell is a non-sealed structure, the outer shell plays a role in protecting the electrode assembly, and a sealing bag is also included between the outer shell and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. When the outer shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0049] As an example, the battery cell 10 can be a cylindrical battery cell 10, a prismatic battery cell 10, a soft-pack battery cell 10 or a battery cell 10 of other shapes. The prismatic battery cell 10 includes a square shell battery cell 10, a blade-shaped battery cell 10, a polygonal battery, and the polygonal battery is, for example, a hexagonal battery, etc. There is no particular limitation in the present application.

[0050] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap is provided to cover the opening. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0051] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through a current collecting member. The electrode terminal may be disposed on an end cap, or may be disposed on the housing.

[0052] In some embodiments, a pressure relief mechanism is disposed on the housing to discharge the internal gas of the battery cell 10 .

[0053] As an example, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell 10.

[0054] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 10 .

[0055] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity.

[0056] As an example, the battery cell assembly may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 10 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 10 by a cable tie.

[0057] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0058] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0059] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells 10 to the box.

[0060] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0061] As an example, the box may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box to accommodate the battery cell assembly. The heat exchange plate of the embodiment of the present application can be used as the bottom plate of the box.

[0062] An embodiment of the present application provides an electrical device, which includes a battery cell 10 and a thermal management system in any one of the embodiments of the present application. The battery cell 10 is used to store or provide electrical energy, and the thermal management system is used to adjust the temperature of the battery cell 10.

[0063] Electrical equipment includes but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, vehicles, ships or spacecraft, etc. Vehicles may include battery vehicles and electric cars, electric toys may include battery vehicles and electric cars, etc., fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc.

[0064] The embodiment of the present application provides an energy storage device, which includes a cabinet, at least two battery devices and a thermal management system in any embodiment of the present application, each battery device includes a battery cell, the cabinet has a battery compartment, and the battery device is accommodated in the battery compartment. The thermal management system is used to adjust the temperature of the battery cell.

[0065] At least two battery devices can form a battery cluster, and the energy storage device includes one or more battery clusters (BatteryCluster). The battery cluster is used to increase the voltage and capacity of the energy storage device. Multiple battery devices are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0066] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0067] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0068] In some embodiments, the energy storage device may include modules such as a main control module, a master control module, a power distribution module, and a fire protection module.

[0069] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch and other modules.

[0070] As an example, the master control module can be used as a battery management unit of the energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module.

[0071] As an example, the fire protection module includes a control panel, a detector, an alarm device, etc., which are used to detect, alarm or extinguish fire in the energy storage device.

[0072] As an example, the power distribution module can be used to distribute power to the power consumption modules of the energy storage device.

[0073] In the related art, the following three methods can be used to dissipate heat from the control device. The first method is: an additional impeller is set in the box body of the control device, and the impeller rotates to stir the airflow inside the box body, accelerating the airflow movement inside the box body to achieve heat dissipation. However, in this method, the life of the impeller is relatively low, which leads to the frequent need to disassemble the box body and replace the impeller, poor reliability, and increased maintenance costs. The second method is: the water path enters the box body of the control device, and the water in the water path absorbs the heat in the box body to achieve heat dissipation. However, in this method, the temperature of the water in the water path is relatively low, and condensation is prone to occur inside the box body. It is also necessary to add additional interfaces and other structures, and there is a risk of water leakage. The third method is: the refrigerant is introduced into the box body of the control device, and the refrigerant is used to absorb the heat in the box body to achieve heat dissipation. However, the use of refrigerant has the problem of difficulty in after-sales maintenance and replacement. If it fails, the entire refrigerant module may need to be disassembled.

[0074] In view of this, an embodiment of the present application provides a thermal management system, which includes a refrigerant unit, a control device, a heat dissipation duct and a condensing fan. The refrigerant unit includes a condenser; the control device includes a control module and a heat sink, the heat sink is used to dissipate heat from the control module; at least part of the heat sink is located in the heat dissipation duct; the condensing fan is used to drive the airflow through the condenser and the heat dissipation duct, the condenser and the heat dissipation duct are both located upstream of the condensing fan along the airflow direction, the condensing fan includes a wind wheel and an air guide shell, at least part of the wind wheel is located in the air guide shell, and the heat dissipation outlet of the heat dissipation duct is connected to the air guide shell.

[0075] The thermal management system provided in the embodiment of the present application sets at least part of the heat sink in the heat dissipation duct. The heat dissipation duct and the condenser share a condensing fan to produce a forced air cooling effect, so that the airflow takes away the heat of the heat sink and the condenser. The control module uses the condensing fan of the condenser to dissipate heat, and the control device does not need to add an additional impeller for driving the airflow in the heat dissipation duct to achieve heat dissipation, which can reduce the number of parts and components, not only reduce the failure rate of parts and the difficulty of maintenance, but also reduce production costs and maintenance costs. The rotation of the wind wheel can form a negative pressure in the air guide shell. The wind wheel rotates to drive the airflow of the heat dissipation duct to enter the air guide shell through the heat dissipation outlet, and then discharge through the air outlet of the air guide shell. The heat dissipation outlet of the heat dissipation duct is connected to the air guide shell, and the airflow is constrained by the heat dissipation duct and the air guide shell, which plays a rectifying role and improves efficiency.

[0076] The thermal management system provided in the embodiment of the present application is further described below with reference to the accompanying drawings. The thermal management system provided in the embodiment of the present application is used to adjust the temperature of the battery cell 10, that is, the thermal management system exchanges heat with the battery cell 10 through the fluid to cool or heat the battery cell 10.

[0077] See also Figures 1 to 3The thermal management system includes a refrigerant unit 1, a control device 2, a heat dissipation duct 3 and a condensing fan 4. The refrigerant unit 1 includes a condenser 11. The control device 2 includes a control module 23 and a heat sink 21, and the heat sink 21 is used to dissipate heat from the control module 23. At least a portion of the heat sink 21 is disposed in the heat dissipation duct 3. The condensing fan 4 is used to drive the air flow through the condenser 11 and the heat dissipation duct 3, and the condenser 11 and the heat dissipation duct 3 are both located upstream of the condensing fan 4 along the air flow direction. The condensing fan 4 includes a wind wheel 41 and an air guide shell 42, and at least a portion of the wind wheel 41 is located in the air guide shell 42, and the heat dissipation outlet 3a of the heat dissipation duct 3 is connected to the air guide shell 42.

[0078] The refrigerant unit 1 is used to realize the refrigerant heat exchange. The condenser 11 is used to release the heat of the refrigerant to the airflow, and the refrigerant in the condenser 11 is converted from gaseous state to liquid state by releasing heat.

[0079] The control module 23 is a structure having a control circuit, and the control module 23 can be used to control the operation of at least one electronic control device in the thermal management system.

[0080] The heat sink 21 is used to provide a heat dissipation function. The heat sink 21 can transfer the heat of the control module 23 to the airflow.

[0081] The heat dissipation air duct 3 is a channel for circulating air flow. The heat dissipation inlet of the heat dissipation air duct 3 can be communicated with the environment so that air can enter the heat dissipation air duct 3.

[0082] The condensing fan 4 is used to force the airflow to flow in a set direction. The condensing fan 4 is used to drive the airflow to flow through the condenser 11 and the heat dissipation duct 3, and the condenser 11 and the heat dissipation duct 3 are both located upstream of the condensing fan 4 along the airflow direction. In other words, when the condensing fan 4 is in operation, the airflow first flows through the condenser 11 and the heat dissipation duct 3, and then flows through the condensing fan 4.

[0083] As an example, the air guide shell 42 forms an air inlet, and the heat dissipation outlet 3a is connected to the air inlet. For example, the surrounding part of the heat dissipation outlet 3a is sealed and connected to the surrounding part of the air inlet. The thermal management system provided in the embodiment of the present application sets at least part of the heat sink 21 in the heat dissipation duct 3, and the heat dissipation duct 3 and the condenser 11 share the condensing fan 4 to produce a forced air cooling effect, so that the airflow takes away the heat of the heat sink 21 and the condenser 11. The control module 23 uses the condensing fan 4 of the condenser 11 to dissipate heat, and the control device 2 does not need to add an additional impeller for driving the air flow in the heat dissipation duct 3 to achieve heat dissipation, which can reduce the number of parts, not only reduce the failure rate of parts, reduce the difficulty of maintenance, but also reduce production costs and maintenance costs. The rotation of the wind wheel 41 can form a negative pressure in the air guide shell 42, and the wind wheel 41 rotates to drive the airflow of the heat dissipation duct 3 to enter the air guide shell 42 through the heat dissipation outlet 3a, and then discharge through the air outlet of the air guide shell 42. The heat dissipation outlet 3a of the heat dissipation air duct 3 is communicated with the air guide shell 42. The heat dissipation air duct 3 and the air guide shell 42 constrain the airflow, which plays a rectifying role and improves efficiency.

[0084] The refrigerant is a flowable fluid. The refrigerant may be a substance that easily absorbs heat to become a gas and easily releases heat to become a liquid. Exemplarily, the refrigerant includes but is not limited to HFC refrigerants or HC hydrocarbon refrigerants, etc.

[0085] The electronic components of the control module 23 are not limited. For example, the control module 23 includes but is not limited to the driver of the condensing fan 4, the driver of the compressor 12, and the driver of the power pump 63, etc. The control module 23 may also include but is not limited to a processor and a switching element, etc. The processor is an electronic device that processes program instructions. The switching element can be used to realize the on and off of the circuit. The driver of the condensing fan 4 is used to drive the operation of the condensing fan 4. The driver of the compressor 12 is used to drive the operation of the compressor 12. The driver of the power pump 63 is used to drive the operation of the power pump 63. The compressor 12 and the power pump 63 are described later and will not be repeated here.

[0086] In some embodiments, the heat sink 21 may be made of a material with good heat transfer performance. For example, the heat sink 21 may be made of a metal material or non-metal material with high thermal conductivity, etc. For example, the heat sink 21 is made of copper, aluminum alloy and / or aluminum, etc.

[0087] In some embodiments, the heat sink 21 may be connected to the control module 23 for heat transfer. In other words, the heat is transferred between the control module 23 and the heat sink 21 mainly in the form of heat conduction.

[0088] Heat transfer connection refers to two structural parts being in direct contact or indirectly connected through a heat-conducting structure so that heat can be transferred between the two structural parts.

[0089] For some examples, see Figure 2 The control device 2 includes a box body 22 , a control module 23 is arranged inside the box body 22 , and a heat dissipation duct 3 is arranged outside the box body 22 .

[0090] As an example, a portion of the heat sink 21 is heat-conductingly connected to the control module 23 , and another portion of the heat sink 21 is located outside the box body 22 and extends into the heat dissipation duct 3 .

[0091] The heat dissipation duct 3 is independent of the internal space of the box body 22. In other words, the heat dissipation duct 3 is not connected to the internal space of the box body 22, the airflow of the heat dissipation duct 3 will not enter the interior of the box body 22, and the airflow inside the box body 22 will not enter the heat dissipation duct 3.

[0092] In this embodiment, the control module 23 is disposed in the box body 22, and the box body 22 can protect the control module 23. The heat dissipation duct 3 is disposed outside the box body 22, which can not only prevent the heat dissipation duct 3 from occupying the limited space in the box body 22, but also improve the waterproof and dustproof performance of the box body 22, and to a certain extent prevent dust and / or other organisms from entering the box body 22 through the heat dissipation duct 3.

[0093] In some embodiments, the heat sink 21 includes a plurality of heat sinks, which are sealed and penetrated through the box body 22 , the heat sinks located inside the box body 22 are heat-conductingly connected to the control module 23 , and the heat sinks located outside the box body 22 extend into the heat dissipation duct 3 .

[0094] In this embodiment, the heat of the control module 23 is mainly transferred to the heat sink by heat conduction, and then the heat sink contacts the airflow in the heat dissipation duct 3 to transfer the heat to the airflow. The heat sink is sealed and penetrates the box body 22, and the connection between the heat sink and the box body 22 is sealed to avoid damaging the dustproof and waterproof performance of the box body 22.

[0095] The type of the condensing fan 4 is not limited. For example, the condensing fan 4 includes but is not limited to an axial flow fan, a cross flow fan or a centrifugal fan, etc.

[0096] The number of the condensing fans 4 is not limited, and the condensing fans 4 may be one or more. For example, the condensing fans 4 may be two, three, or four.

[0097] For some examples, see Figure 1 and Figure 2 The thermal management system includes a cabinet 5, a condenser 11, a control device 2, a heat dissipation duct 3 and a condensing fan 4 are all located in the cabinet 5, and an exhaust port 5a is formed in the cabinet 5, and an air outlet of the condensing fan 4 is connected to the exhaust port 5a.

[0098] As an example, the air outlet of the air guide housing 42 is communicated with the air outlet 5a. For example, the surrounding area of ​​the air outlet is sealed and connected with the surrounding area of ​​the air outlet 5a.

[0099] In this embodiment, the cabinet 5 can provide protection for the condenser 11, the control device 2, the heat dissipation duct 3, the condensation fan 4 and other components, thereby reducing the probability of an object or organism accidentally touching the above components. The airflow from the heat dissipation duct 3 and the condenser 11 can be discharged from the cabinet 5 through the air outlet and the exhaust port 5a, so as to transfer the heat to the environment outside the cabinet 5.

[0100] The control device 2 and the condensing fan 4 can be arranged according to the space in the cabinet 5. For example, the control device 2 can be set above X1 of the condensing fan 4 or on a side away from the exhaust port 5a, etc.

[0101] For some examples, see Figure 1 and Figure 2 The condensing fan 4 is located above the control device 2 at X1. The space X2 below the condensing fan 4 is more open, and there is more sufficient space to place the control device 2. The position of the control device 2 is relatively low, so that the control device 2 can be easily inspected.

[0102] For some examples, see Figure 1 and Figure 2 , a plurality of condensing fans 4 are arranged in the up-down direction and are all located above the control device 2 X1. The heat dissipation outlet 3a of the heat dissipation air duct 3 can be communicated with the air guide shell 42 of the condensing fan 4 at the bottom X2.

[0103] In some embodiments, the condensing fan 4 is located above the control device 2 X1, and the condensing fan 4 is an axial flow fan. The axial direction of the wind wheel 41 is in the horizontal direction, and the air guide shell 42 forms an air inlet and an air outlet on both sides of the axial direction of the wind wheel 41, respectively. The air outlet is connected to the exhaust port 5a, and the condenser 11 is arranged on the side of the air outlet away from the exhaust port 5a. The surface of the air guide shell 42 facing the control device 2 can form an air suction port, and the heat dissipation outlet 3a of the heat dissipation duct 3 is connected to the air suction port. As an example, the heat dissipation duct 3 can extend roughly in a straight line. With such a design, the distance between the air guide shell 42 at the bottom X2 and the control device 2 is relatively close, and the length of the heat dissipation duct 3 can be shorter, so as to facilitate the rapid flow of air, thereby improving the heat dissipation efficiency.

[0104] The configuration of the heat dissipation duct 3 is not limited. In some embodiments, the outer surface of the box body 22 can be used as a part of the wall surface of the heat dissipation duct 3. That is, a plate can be used to surround the outer surface of the box body 22, and the plate and part of the outer surface of the box body 22 together constitute at least part of the heat dissipation duct 3. In other embodiments, the pipe structure can be assembled to the outer surface of the box body 22, and the internal space of the pipe structure is the heat dissipation duct 3. That is, the heat dissipation duct 3 can be constituted by the pipe structure alone.

[0105] For some examples, see Figure 3The thermal management system includes a heat exchange unit 6 and an evaporator 7. The heat exchange unit 6 includes a heat exchange flow path 61 for exchanging heat with the battery cell 10. The evaporator 7 includes a refrigerant channel and a heat exchange channel capable of performing heat exchange. The refrigerant of the refrigerant unit 1 flows through the refrigerant channel, and the heat exchange fluid of the heat exchange flow path 61 flows through the heat exchange channel.

[0106] The heat exchange flow path 61 refers to the path where the heat exchange fluid flows. The heat exchange flow path 61 is used to exchange heat with the battery cell 10 to adjust the temperature of the battery cell 10. The heat exchange fluid exchanges heat with the battery cell 10 to reduce or increase the temperature of the battery cell 10. For example, the heat exchange fluid can release heat to the battery cell 10 to increase the temperature of the battery cell 10, and the heat exchange fluid can absorb the heat of the battery cell 10 to reduce the temperature of the battery cell 10.

[0107] The refrigerant channel and the heat exchange channel are independent of each other. In other words, the refrigerant channel and the heat exchange channel are not connected, and the refrigerant in the refrigerant channel and the heat exchange fluid in the heat exchange channel do not flow with each other.

[0108] The refrigerant in the refrigerant channel absorbs the heat of the heat exchange fluid in the heat exchange channel, and the refrigerant changes from liquid to gas.

[0109] In this embodiment, the heat exchange fluid of the heat exchange unit 6 flows through the heat exchange channel, and the refrigerant of the refrigerant unit 1 flows through the refrigerant channel. The heat exchange fluid in the heat exchange channel and the refrigerant in the refrigerant channel can exchange heat. In this way, the heat exchange fluid exchanges heat with the battery cell 10 through the heat exchange flow path 61, and the heat exchange fluid and the refrigerant exchange heat through the evaporator 7, thereby realizing heat transfer among the heat exchange fluid, the refrigerant and the battery cell 10.

[0110] For example, in some embodiments, the condenser 11 may include a condensation pipe and fins, wherein the fins are disposed in the condensation pipe, the condensation pipe is used to circulate the refrigerant, and the fins are used to increase the heat exchange area of ​​the condensation pipe. In other words, the condenser 11 may be a fin-tube heat exchanger.

[0111] For example, in some embodiments, the evaporator 7 may include a plurality of stacked heat exchange fins, and two adjacent heat exchange fins are assembled to form a fluid channel, wherein part of the fluid channel is a refrigerant channel, and another part of the fluid channel is a heat exchange channel. In other words, the evaporator 7 may be a plate heat exchanger. The refrigerant in the refrigerant channel and the heat exchange fluid in the heat exchange channel may be heat-conducted through the heat exchange fins.

[0112] The manufacturing method of the heat exchanger is not limited. The heat exchanger can be pressed by metal material to form a sheet structure with grooves. The grooves of two heat exchangers are spliced ​​relative to each other to form a fluid channel. Each heat exchanger can be fastened and connected by screws or bolts.

[0113] The heat exchange fluid is a flowable fluid used for heat exchange and is used to absorb or release heat to heat or cool the battery cell 10. The type of heat exchange fluid is not limited, and the heat exchange fluid includes but is not limited to water.

[0114] For some examples, see Figure 3 The heat exchange unit 6 includes a heater 62, and the heater 62 is arranged in the heat exchange flow path 61 to heat the heat exchange fluid.

[0115] In this embodiment, the heater 62 is used to heat the heat exchange fluid in the heat exchange flow path 61. The heat exchange unit 6 can heat the heat exchange fluid through the heater 62 to increase the temperature of the battery cell 10 and provide a heating function. The refrigerant unit 1 can only be used to absorb the heat of the heat exchange fluid to reduce the temperature of the battery cell 10 and provide a cooling function, but no longer provide a heating function. This design can simplify the structure of the refrigerant unit 1 and simplify the control method of the refrigerant unit 1.

[0116] The type of the heater 62 is not limited, and the heater 62 includes but is not limited to a resistive heater 62 or a positive temperature coefficient heater 62 and the like.

[0117] In some embodiments, the thermal management system has a cooling mode and a heating mode; In the cooling mode, the condensing fan 4 and the condenser 11 are both in operation, and the heater 62 is in shutdown.

[0118] The cooling mode is a mode for cooling the battery cells 10 .

[0119] In the cooling mode, the heat exchange fluid absorbs the heat of the battery cell 10, flows through the heat exchange channel and releases the heat to the refrigerant in the refrigerant channel, and the refrigerant in the refrigerant channel flows through the condenser 11 and releases the heat to the airflow, thereby achieving cooling of the battery cell 10.

[0120] In the heating mode, the condensing fan 4 and the heater 62 are both in operation, and the condenser 11 is in shutdown.

[0121] The heating mode is a mode for heating the battery cells 10 .

[0122] In the heating mode, the condensing unit does not work, the refrigerant does not flow, and the refrigerant in the refrigerant channel and the heat exchange fluid in the heat exchange channel do not exchange heat. The heater 62 heats the heat exchange fluid, and the heat exchange fluid releases heat to the battery cell 10 to heat the battery cell 10.

[0123] In this embodiment, in the cooling mode, the condensing unit is used to achieve cooling, and the condensing fan 4 is in operation to drive the airflow through the condenser 11 and the heat dissipation duct 3, and the airflow can take away the heat of the refrigerant in the condenser 11 and the heat dissipation element 21. In the heating mode, the heat exchange unit 6 is used to achieve heating, and the condensing fan 4 is in operation to drive the airflow through the heat dissipation duct 3, and the airflow can take away the heat of the heat dissipation element 21.

[0124] It is understood that the operating state refers to the state in which the device is working. Taking the heater 62 as an example, the heater 62 is in the operating state, which means that the heater 62 is working and heating the heat exchange fluid. The explanation of other devices is similar to that of the heater 62, and will not be repeated here.

[0125] It is understood that the shutdown state refers to the state in which the device is not working. Taking the heater 62 as an example, the shutdown state of the heater 62 means that the heater 62 is not working and does not heat the heat exchange fluid. The explanation of other devices is similar to that of the heater 62 and will not be repeated here.

[0126] In some embodiments, in the heating mode, at least one condensing fan 4 runs at a preset speed. The preset speed may be the minimum speed of the condensing fan 4. Exemplarily, the preset speed may be 200 r / min to 300 r / min. In the heating mode, the condenser 11 is in a shutdown state, the condensing unit is not working, and the heat generated by the control module 23 is relatively small. Therefore, the speed of the condensing fan 4 may be relatively low, and energy consumption may be reduced while meeting the heat dissipation requirements.

[0127] For some examples, see Figure 3 The heat exchange unit 6 includes a power pump 63, which is arranged in the heat exchange flow path 61 to drive the heat exchange fluid to flow. The power pump 63 is a device that can provide power to drive the fluid to flow.

[0128] The thermal management system has a self-circulation mode. In the self-circulation mode, the condensing fan 4 and the power pump 63 are both in operation, and the condenser 11 and the heater 62 are both in shutdown.

[0129] In the self-circulation mode, the condenser 11 is in a shutdown state, and the condensing unit does not provide cooling; the heater 62 is in a shutdown state and does not provide heating; the power pump 63 is in an operating state, and can drive the heat exchange fluid in the heat exchange path 61 to flow, so that the heat exchange fluid flows through the battery cell 10 to achieve heat exchange.

[0130] In this embodiment, in the self-circulation mode, the condensing unit does not provide cooling, and the heater 62 does not provide heating, but uses the natural temperature difference between the heat exchange fluid and the battery cell 10 to achieve heat exchange. The condensing fan 4 is in operation to drive the air flow through the heat dissipation duct 3 to achieve heat dissipation. Since the condenser 11 and the heater 62 are both in the shutdown state in the self-circulation mode, the heat generated by the control module 23 is relatively smaller, so the speed of the condensing fan 4 can be lower, and the energy consumption can be reduced while meeting the heat dissipation requirements.

[0131] It is understandable that in cooling mode, the power pump 63 is in operation. In heating mode, the power pump 63 is in operation. That is, in cooling mode, heating mode or self-circulation mode, the heat exchange fluid needs to exchange heat with the battery cell 10, and the power pump 63 is in operation to drive the heat exchange fluid to flow.

[0132] In some embodiments, the control module 23 includes a pump inverter, which is used to adjust the operating frequency of the power pump 63 , and the pump inverter is connected to the heat sink 21 in a heat transfer manner.

[0133] The power pump 63 is a variable frequency power pump 63, the working frequency of the variable frequency power pump 63 is adjustable, and the pump inverter is used to realize variable frequency control of the power pump 63. The use of the variable frequency power pump 63 can achieve energy saving effect.

[0134] In this embodiment, the pump inverter generates heat when running, and the pump inverter needs to be cooled to maintain stable operation. The pump inverter is heat-transfer connected to the heat sink 21. The heat generated by the pump inverter can be conducted to the heat sink 21 and then transferred to the airflow flowing through the heat dissipation duct 3.

[0135] In some embodiments, the power pump 63 may also be a fixed-frequency power pump 63. In other words, the operating frequency of the power pump 63 is not adjustable.

[0136] In some embodiments, the control module 23 includes a fan inverter, which is used to adjust the operating frequency of the condensing fan 4 , and the fan inverter is heat-conductingly connected to the heat sink 21 .

[0137] The condensing fan 4 is a variable frequency condensing fan 4, the working frequency of which is adjustable, and the fan frequency converter is used to realize variable frequency control of the condensing fan 4. The use of the variable frequency condensing fan 4 can achieve energy saving effect.

[0138] In this embodiment, the fan inverter generates heat when running, and the fan inverter needs to be cooled to maintain stable operation. The fan inverter is heat-transfer connected to the heat sink 21. The heat generated by the fan inverter can be conducted to the heat sink 21 and then transferred to the airflow flowing through the heat dissipation duct 3.

[0139] In some embodiments, the condensing fan 4 may also be a fixed-frequency condensing fan 4. That is, the operating frequency of the condensing fan 4 is not adjustable.

[0140] In some embodiments, the refrigerant unit 1 includes a compressor 12 , and the control module 23 includes a frequency converter for the compressor 12 . The frequency converter for the compressor 12 is used to adjust the operating frequency of the compressor 12 , and the frequency converter for the compressor 12 is heat-transferably connected to the heat sink 21 .

[0141] The compressor 12 is a variable frequency compressor 12, the working frequency of the variable frequency compressor 12 is adjustable, and the frequency converter of the compressor 12 is used to realize variable frequency control of the compressor 12. The use of the variable frequency compressor 12 can achieve energy saving effect.

[0142] In this embodiment, the compressor 12 inverter generates heat when it is running, and the compressor 12 inverter needs to be cooled to maintain stable operation. The compressor 12 inverter is heat-transfer connected to the heat sink 21. The heat generated by the compressor 12 inverter can be conducted to the heat sink 21 and then transferred to the airflow flowing through the heat dissipation duct 3.

[0143] In some embodiments, the compressor 12 may also be a fixed-frequency compressor 12. That is, the operating frequency of the compressor 12 is not adjustable.

[0144] In some embodiments, the heat exchange unit 6 includes a heat exchange plate, which is heat-conductingly connected to the battery cell 10. As an example, the battery cell 10 can be connected to the heat exchange plate by a thermally conductive adhesive. The heat exchange fluid in the heat exchange plate exchanges heat with the battery cell 10 through the heat exchange plate and the thermally conductive adhesive.

[0145] As an example, the heat exchange plate has a flow channel for heat exchange fluid to flow inside, and the flow channel is a part of the heat exchange flow path 61. The heat exchange plate also has a fluid inlet and a fluid outlet both connected to the flow channel, and the fluid inlet is used to supply the heat exchange fluid to the flow channel of the heat exchange plate, and the heat exchange fluid in the flow channel of the heat exchange plate is discharged through the fluid outlet.

[0146] It is understood that there is a temperature difference between the heat exchange fluid in the heat exchange plate and the battery cell 10 to achieve heat exchange. The heat transfer method between the heat exchange plate and the battery cell 10 is not limited, and exemplary heat transfer methods include but are not limited to heat conduction and / or heat radiation.

[0147] In some embodiments, the heat exchange plate can be used as a part of the box of the battery device, for example, as the bottom plate of the box of the battery device.

[0148] In one embodiment, please refer to Figure 3 The condensing unit includes a throttling device 13, and the refrigerant channels of the compressor 12, the condenser 11, the throttling device 13 and the evaporator 7 are connected through a pipeline to form a refrigerant flow path. The heater 62 and the power pump 63 are both arranged in the heat exchange flow path 61.

[0149] The refrigerant circulates in the refrigerant flow path. The refrigerant flow path is the flow path of the refrigerant, and the condensation pipe of the condenser 11, the refrigerant channel of the evaporator 7, and the pipe for circulating the refrigerant are all part of the refrigerant flow path.

[0150] The heat exchange fluid circulates in the heat exchange flow path 61. The heat exchange flow path 61 is the flow path of the heat exchange fluid, and the flow channels of the heat exchange plates, the heat exchange channels of the evaporator 7, and the pipes for circulating the heat exchange fluid are all part of the heat exchange flow path 61.

[0151] In the cooling mode, the compressor 12, the condensing fan 4, the condenser 11, the throttling device 13 and the power pump 63 are all in operation, and the heater 62 is in shutdown.

[0152] Exemplarily, the refrigerant circulates in the refrigerant flow path, the compressor 12 sucks in the low-pressure gaseous refrigerant and compresses it into high pressure and discharges it; the discharged high-pressure refrigerant enters the condenser 11, and the refrigerant in the condenser 11 transfers heat to the airflow to condense into a high-pressure liquid refrigerant; the high-pressure liquid refrigerant flows through the throttling device 13 and is throttled and decompressed, and becomes a low-pressure and low-temperature gas-liquid two-phase mixture and enters the refrigerant channel of the evaporator 7; the refrigerant in the refrigerant channel absorbs the heat of the heat exchange fluid and becomes a low-pressure gas; the low-pressure gaseous refrigerant is sucked in by the compressor 12 again; this cycle is repeated to achieve cooling of the battery cell 10.

[0153] In the heating mode, the compressor 12, the condenser 11 and the throttling device 13 are all in a stopped state, while the power pump 63, the heater 62 and the condensing fan 4 are all in a running state.

[0154] Exemplarily, the heat exchange fluid heated by the heater 62 enters the flow channel of the heat exchange plate, and the heat exchange fluid in the flow channel of the heat exchange plate releases heat to the battery cell 10. The cooled heat exchange fluid enters the heat exchange channel of the evaporator 7 and then flows back to the location of the heater 62, and is heated again by the heater 62. This cycle is repeated to achieve the heating of the battery cell 10.

[0155] In the self-circulation mode, the compressor 12, the condenser 11, the throttling device 13 and the heater 62 are all in a stopped state, and the power pump 63 and the condensing fan 4 are in a running state.

[0156] In this embodiment, the thermal management system can implement cooling mode, heating mode and self-circulation mode respectively. In the three modes, the heat dissipation of the control device 2 can be achieved by running the condensing fan 4 to drive the air flow in the heat dissipation duct 3.

[0157] Exemplarily, the throttling device 13 includes but is not limited to an electronic expansion valve.

[0158] In one embodiment, the condensing unit includes a liquid storage tank 14, which is disposed in a pipeline between the condenser 11 and the throttling device 13. That is, the refrigerant from the condenser 11 first enters the liquid storage tank 14 and then enters the throttling device 13. The liquid storage tank 14 can buffer the high-pressure liquid refrigerant from the condenser 11.

[0159] In some embodiments, the thermal management system includes a temperature sensor, which can be provided on the pump inverter to detect the temperature of the pump inverter. The control module 23 can control the speed of the condensing fan 4 closest to the control module 23 according to the temperature detected by the temperature sensor. In this way, not only the heat dissipation requirements of the pump inverter can be met, but also the energy saving requirements can be taken into account.

[0160] In a specific embodiment, please refer to Figures 1 to 3 The thermal management system includes a refrigerant unit 1, a control device 2, a heat dissipation duct 3, a condensing fan 4 and a heat exchange unit 6. The control device 2 includes a control module 23, a heat sink 21 and a box body 22. The heat sink 21 is used to dissipate heat for the control module 23; at least part of the heat sink 21 is located in the heat dissipation duct 3; the condensing fan 4 is used to drive the air flow through the condenser 11 and the heat dissipation duct 3, and the condenser 11 and the heat dissipation duct 3 are both located upstream of the condensing fan 4 along the air flow direction. The control module 23 is arranged in the box body 22, and the heat dissipation duct 3 is arranged outside the box body 22. The condensing unit includes a throttling device 13, and the refrigerant channels of the compressor 12, the condenser 11, the throttling device 13 and the evaporator 7 are connected through a pipeline to form a refrigerant flow path. The heater 62 and the power pump 63 are both arranged in the heat exchange flow path 61.

[0161] The thermal management system has a cooling mode, a heating mode and a self-circulation mode. In the cooling mode, the compressor 12, the condensing fan 4, the condenser 11, the throttling device 13 and the power pump 63 are all in operation, and the heater 62 is in a stopped state. In the heating mode, the compressor 12, the condenser 11 and the throttling device 13 are all in a stopped state. The power pump 63, the heater 62 and the condensing fan 4 are all in operation. In the self-circulation mode, the compressor 12, the condenser 11, the throttling device 13 and the heater 62 are all in a stopped state, and the power pump 63 and the condensing fan 4 are in operation.

[0162] In this embodiment, at least part of the heat sink 21 is arranged in the heat dissipation duct 3, and the heat dissipation duct 3 and the condenser 11 share the condensing fan 4 to produce a forced air cooling effect, so that the airflow takes away the heat of the heat sink 21 and the condenser 11. The control module 23 uses the condensing fan 4 of the condenser 11 to dissipate heat, and the control device 2 does not need to add an additional impeller for driving the airflow in the heat dissipation duct 3 to achieve heat dissipation, which can reduce the number of parts and components, not only reduce the failure rate of parts and components, reduce the difficulty of maintenance, but also reduce production costs and maintenance costs. The thermal management system can implement cooling mode, heating mode and self-circulation mode respectively. In the three modes, the control device 2 can dissipate heat by running the condensing fan 4 to drive the airflow in the heat dissipation duct 3.

[0163] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A thermal management system, characterized in that: include: Refrigerant unit, including condenser; A control device, comprising a control module and a heat sink, wherein the heat sink is used to dissipate heat from the control module; a heat dissipation duct, wherein at least a portion of the heat dissipation element is disposed in the heat dissipation duct; The condensing fan is used to drive the air flow through the condenser and the heat dissipation duct. The condenser and the heat dissipation duct are both located upstream of the condensing fan along the air flow direction. The condensing fan includes a wind wheel and an air guide shell. At least part of the wind wheel is located in the air guide shell. The heat dissipation outlet of the heat dissipation duct is connected to the air guide shell.

2. The thermal management system according to claim 1, characterized in that: The control device comprises a box body, the control module is arranged inside the box body, and the heat dissipation duct is arranged outside the box body.

3. The thermal management system according to claim 1, characterized in that: The thermal management system includes a cabinet, the condenser, the control device, the heat dissipation duct and the condensing fan are all located in the cabinet, an exhaust port is formed in the cabinet, and an air outlet of the condensing fan is connected to the exhaust port.

4. The thermal management system according to claim 3, characterized in that: The condensing fan is located above the control device.

5. The thermal management system according to claim 1, characterized in that: The thermal management system includes a heat exchange unit and an evaporator. The heat exchange unit includes a heat exchange flow path for exchanging heat with a battery cell. The evaporator includes a refrigerant channel and a heat exchange channel capable of performing heat exchange. The refrigerant of the refrigerant unit flows through the refrigerant channel, and the heat exchange fluid of the heat exchange flow path flows through the heat exchange channel.

6. The thermal management system according to claim 5, characterized in that: The heat exchange unit comprises a heater, and the heater is arranged in the heat exchange flow path to heat the heat exchange fluid.

7. The thermal management system according to claim 6, characterized in that: The thermal management system has a cooling mode and a heating mode; In the cooling mode, the condensing fan and the condenser are both in operation, and the heater is in shutdown; In the heating mode, the condensing fan and the heater are both in operation, and the condenser is in shutdown.

8. The thermal management system according to claim 6, characterized in that: The heat exchange unit includes a power pump, which is arranged in the heat exchange flow path to drive the heat exchange fluid to flow, and the thermal management system has a self-circulation mode; In the self-circulation mode, the condensing fan and the power pump are both in operation, and the condenser and the heater are both in shutdown.

9. The thermal management system according to claim 8, characterized in that: The control module comprises a pump frequency converter, which is used to adjust the working frequency of the power pump, and the pump frequency converter is heat-transferringly connected to the heat sink.

10. The thermal management system according to any one of claims 1 to 9, characterized in that: The control module comprises a fan frequency converter, which is used to adjust the operating frequency of the condensing fan, and the fan frequency converter is heat-conductingly connected to the heat sink.

11. The thermal management system according to any one of claims 1 to 9, characterized in that: The refrigerant unit includes a compressor, the control module includes a compressor inverter, the compressor inverter is used to adjust the operating frequency of the compressor, and the compressor inverter is heat-transferably connected to the heat sink.

12. An energy storage device, characterized in that: include: at least two battery devices, each of the battery devices comprising a battery cell; The cabinet has a battery compartment, and the battery device is accommodated in the battery compartment; The thermal management system according to any one of claims 1 to 11, wherein the thermal management system is used to regulate the temperature of the battery cell.

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