Electric drive heat dissipation-integrated battery thermal management unit

Abstract

The present invention relates to the technical field of battery thermal management, and provides an electric drive heat dissipation-integrated battery thermal management unit. The unit comprises a housing and an electric drive heat radiator, a condenser assembly and a heat dissipation fan which are provided in the housing; the condenser assembly is located on one side of the electric drive heat radiator; the heat dissipation fan is located on the other side of the electric drive heat radiator; and air sequentially flows through the condenser assembly and the electric drive heat radiator by means of the heat dissipation fan. According to the present invention, the electric drive heat radiator, the condenser assembly and the heat dissipation fan are provided in the same housing, such that airflow generated by the heat dissipation fan sequentially flows through the condenser assembly and the electric drive heat radiator, thereby satisfying the heat dissipation requirements of both the condenser assembly and the electric drive heat radiator, and there is no need to additionally use an independent fan to perform heat dissipation on the electric drive heat radiator, thereby reducing the number of devices, achieving low costs and a high integration level, facilitating reduction of the overall size of the battery thermal management unit, and making the battery thermal management unit more miniaturized, reducing the occupied space of the whole vehicle and the weight of the whole vehicle.

Description

Battery thermal management unit with integrated electric drive cooling

[0001] The present invention claims priority to Chinese patent application number 202311810367.5, filed with the Patent Office of China on December 25, 2023, entitled “BATTLE THERMAL MANAGEMENT UNIT WITH INTEGRATED ELECTRIC DRIVE AND HEAT DISCHARGE”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of battery thermal management, and in particular to a battery thermal management unit with integrated electric drive and heat dissipation. Background Art

[0003] Currently, vehicle power batteries are subject to thermal runaway at high temperatures and rapid charge decay at low temperatures. To ensure the continued normal operation of vehicle power batteries, a battery thermal management system is deployed to maintain an appropriate operating temperature for the vehicle power batteries. Furthermore, the vehicle's electric drive generates a significant amount of heat, which needs to be dissipated promptly. Therefore, an electric drive cooling system is required to maintain an appropriate operating temperature for the vehicle's electric drive.

[0004] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0005] In the existing system, the battery thermal management system that dissipates heat for the vehicle's power battery and the electric drive cooling system that dissipates heat for the vehicle's electric drive are set up independently of each other, and both require separate fans, which take up more space in the vehicle, increase the weight of the vehicle, and are costly. Technical issues

[0006] The purpose of the present invention is to provide a battery thermal management unit with integrated electric drive heat dissipation, which can improve the problems in the prior art that the battery thermal management system and the electric drive heat dissipation system are set up independently of each other, and both require separate fans, which takes up more space in the vehicle, increases the weight of the vehicle, and is costly. Technical Solutions

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] A battery thermal management unit with integrated electric drive and heat dissipation, comprising:

[0009] a housing; and

[0010] An electric drive radiator, a condenser assembly and a cooling fan are arranged in the shell, the condenser assembly is located on one side of the electric drive radiator, and the cooling fan is located on the other side of the electric drive radiator. The cooling fan allows air to flow through the condenser assembly and the electric drive radiator in sequence.

[0011] Furthermore, the condenser assembly includes a microchannel heat exchanger and a liquid reservoir integrated on the microchannel heat exchanger, and the liquid reservoir is communicated with the microchannel heat exchanger.

[0012] Furthermore, the liquid reservoir is integrated with a drying filter, and / or the liquid reservoir is integrated with a sight glass.

[0013] Furthermore, the microchannel heat exchanger includes a first header, a second header, and a flat tube disposed between the first header and the second header, one end of the flat tube being connected to the first header, and the other end being connected to the second header;

[0014] The inner wall surface of the flat tube is provided with a capillary structure, and / or the inner wall surface of the flat tube is provided with micro grooves.

[0015] Furthermore, there are multiple flat tubes, and fins are provided between two adjacent flat tubes;

[0016] The fins are streamlined, arc-shaped or S-shaped.

[0017] Furthermore, the liquid reservoir is arranged outside the second manifold, and a first flow hole, a second flow hole and a third flow hole are sequentially arranged between the liquid reservoir and the second manifold from top to bottom;

[0018] The first flow hole is used for gaseous refrigerant to flow into the liquid reservoir, the second flow hole is used for liquid refrigerant to flow into the liquid reservoir, and the third flow hole is used for refrigerant to flow back into the second manifold.

[0019] Furthermore, the battery thermal management unit with integrated electric drive and heat dissipation also includes a battery thermal management system, which includes a compressor, a plate heat exchanger, an expansion valve, a battery module liquid circulation system and the condenser assembly;

[0020] The compressor, the condenser assembly, the expansion valve, and the refrigerant channel of the plate heat exchanger are sequentially connected through pipelines to form a refrigerant circulation loop;

[0021] The condenser assembly includes a refrigerant inlet and a refrigerant outlet, the refrigerant outlet is connected to the expansion valve, and the refrigerant inlet is connected to the compressor;

[0022] The battery module liquid circulation system is connected to the cooling liquid channel of the plate heat exchanger to form a first cooling liquid circulation loop.

[0023] Furthermore, the battery thermal management unit with integrated electric drive heat dissipation also includes an electric drive heat dissipation system, which includes a liquid circulation pipeline, a circulation pump, an electric drive module liquid circulation system and the electric drive radiator;

[0024] The electric drive module liquid circulation system is connected to the liquid circulation pipeline to form a second coolant circulation loop;

[0025] The electric drive radiator is a microchannel heat exchanger.

[0026] Furthermore, the electric drive radiator is provided with a liquid inlet and a liquid outlet, the liquid inlet end of the circulation pump is connected to the liquid outlet of the electric drive module liquid circulation system through the liquid circulation pipeline, the liquid outlet end of the circulation pump is connected to the liquid inlet of the electric drive radiator through the liquid circulation pipeline, and the liquid outlet of the electric drive radiator is connected to the liquid inlet of the electric drive module liquid circulation system through the liquid circulation pipeline.

[0027] Furthermore, an expansion water tank is provided on the liquid circulation pipeline between the liquid inlet end of the circulation pump and the liquid outlet of the electric drive module liquid circulation system. Beneficial effects

[0028] Compared with the existing technology, the battery thermal management unit with integrated electric drive and heat dissipation provided by the present invention has at least the following technical effects:

[0029] The battery thermal management unit with integrated electric drive heat dissipation provided by the present invention arranges the electric drive radiator, condenser assembly and heat dissipation fan in the same shell, wherein the condenser assembly is located on one side of the electric drive radiator, and the heat dissipation fan is located on the other side of the electric drive radiator, so that the condenser assembly and the electric drive radiator share a set of heat dissipation fans, and the airflow generated by the heat dissipation fan flows through the condenser assembly and the electric drive radiator in turn, which can meet the heat dissipation requirements of the condenser assembly and the electric drive radiator at the same time, without the need to use an additional independent fan to dissipate heat for the electric drive radiator, reducing the number of components, lowering the cost and increasing the integration, which is conducive to reducing the overall volume of the battery thermal management unit and making it more miniaturized, thereby reducing the space occupied by the entire vehicle and reducing the weight of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic structural diagram of a battery thermal management unit with integrated electric drive and heat dissipation in one embodiment;

[0031] FIG2 is a schematic structural diagram of a condenser assembly in one embodiment;

[0032] FIG3 is a schematic diagram showing the working principle of the refrigerant in the battery thermal management system according to an embodiment.

[0033] Explanation of the reference numerals: 10, housing; 20, electric drive radiator; 21, liquid inlet; 22, liquid outlet; 30, condenser assembly; 40, cooling fan; 31, first manifold; 311, inlet connector; 312, outlet connector; 313, first diverter hole; 314, first partition; 315, first upper chamber; 316, first lower chamber; 32, second manifold; 321, second diverter hole; 322, second partition; 323, second upper chamber; 3 24. Second lower chamber; 33. Flat tube; 34. Refrigerant inlet; 35. Refrigerant outlet; 36. Side plate; 50. Liquid reservoir; 51. First flow hole; 52. Second flow hole; 53. Third flow hole; 54. Dry filter; 541. Filter screen; 542. Desiccant; 60. Sight glass; 70. Compressor; 80. Plate heat exchanger; 90. Expansion valve; 100. Temperature sensor; 110. Electronic control box; 120. Pipeline. Modes for Carrying Out the Invention

[0034] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, reference is made to "some embodiments", which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0035] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] Referring to FIG1 , an embodiment of the present invention provides a battery thermal management unit with integrated electric drive heat dissipation, comprising a housing 10 and an electric drive radiator 20, a condenser assembly 30, and a heat dissipation fan 40 disposed within the housing 10. The condenser assembly 30 is located on one side of the electric drive radiator 20, and the heat dissipation fan 40 is located on the other side of the electric drive radiator 20. The heat dissipation fan 40 causes air to flow sequentially through the condenser assembly 30 and the electric drive radiator 20. Both the electric drive radiator 20 and the condenser assembly 30 are within the air inlet area of ​​the heat dissipation fan 40. Thus, the airflow generated by the heat dissipation fan 40 can act on both the electric drive radiator 20 and the condenser assembly 30 simultaneously.

[0037] In this embodiment, an electric drive radiator 20, a condenser assembly 30 and a heat dissipation fan 40 are arranged in the same shell 10, wherein the condenser assembly 30 is located on one side of the electric drive radiator 20, and the heat dissipation fan 40 is located on the other side of the electric drive radiator 20, so that the condenser assembly 30 and the electric drive radiator 20 share a set of heat dissipation fans 40. The airflow generated by the heat dissipation fan 40 flows through the condenser assembly 30 and the electric drive radiator 20 in sequence, which can meet the heat dissipation requirements of the condenser assembly 30 and the electric drive radiator 20 at the same time, without the need to use an additional independent fan to dissipate heat for the electric drive radiator 20, thereby reducing the number of components, lowering the cost, and increasing the integration, which is conducive to reducing the overall volume of the battery thermal management unit, making it more miniaturized, thereby reducing the space occupied by the entire vehicle and reducing the weight of the entire vehicle.

[0038] In an optional embodiment, the condenser assembly 30, the electric radiator 20, and the cooling fan 40 are arranged in parallel to reduce airflow resistance and pressure loss. This allows the airflow generated by the cooling fan 40 to flow more smoothly through the condenser assembly 30 and the electric radiator 20, thereby improving the cooling effect. It should be further noted that the cooling fan 40 can be a stepless speed-adjustable cooling fan 40. The speed of the cooling fan 40 can be precisely controlled according to actual thermal management requirements, making the entire unit more energy-efficient.

[0039] Microchannel heat exchanger is a heat exchange equipment. Compared with traditional heat exchangers, it has many advantages such as compact structure, light weight, high heat exchange efficiency, safe operation, and high reliability. It can meet the requirements of narrow space and compact structure and is widely used in various occasions.

[0040] The channels of a microchannel heat exchanger are small, and the corners at the ends of the manifold and flat tubes create significant flow resistance when the refrigerant flows through the channels, resulting in a significant pressure drop, which affects the heat exchanger's performance. Furthermore, microchannel heat exchangers typically incorporate multiple flow channels within the flat tubes 33 to increase the heat exchange area. However, this increased heat exchange area leads to increased pressure drop, and current microchannel heat exchangers still struggle to achieve a good balance between heat exchange area and pressure drop.

[0041] Therefore, referring to FIG2 , in an optional embodiment, the condenser assembly 30 includes a microchannel heat exchanger and a liquid reservoir 50 integrated with the microchannel heat exchanger, with the liquid reservoir 50 and the microchannel heat exchanger being in communication. In this embodiment, by integrating the liquid reservoir 50 with the microchannel heat exchanger, when the system does not require much refrigerant, excess refrigerant can be stored in the liquid reservoir 50 to maintain the system pressure at a normal level. When more refrigerant is needed, the refrigerant in the liquid reservoir 50 can be added to the system to meet the system's needs.

[0042] In an optional embodiment, the liquid reservoir 50 is integrated with a drying filter 54. The drying filter 54 can dry and filter the refrigerant, improve the quality and purity of the refrigerant, extend the service life of the system, and ensure the reliability and stability of the system. The drying filter 54 includes a filter and a desiccant 542 disposed within the filter. The filter can be a filter screen 541, which is arranged to form a cylindrical structure, and the desiccant 542 is installed within the cylindrical structure. Of course, the drying filter 54 can take other forms. Furthermore, the desiccant 542 can be calcium sulfate, calcium chloride, or activated alumina, etc., all of which can effectively remove moisture from the refrigerant and ensure the purity of the refrigerant after filtration. The liquid reservoir 50 can be an aluminum alloy container. The drying filter 54 can be installed at the bottom of the liquid reservoir 50 to reduce the number of pipeline connections, thereby reducing the risk of refrigerant leakage caused by pipeline connections and improving the reliability of the system.

[0043] In an optional embodiment, the liquid reservoir 50 is integrated with a sight glass 60. Specifically, the sight glass 60 is provided at the bottom of the liquid reservoir 50. With the sight glass 60 integrated into the liquid reservoir 50, the status of the refrigerant can be conveniently checked. When the system is fully loaded, the liquid level of the refrigerant can be observed through the sight glass 60 to determine whether it meets the needs of the system. This ensures the normal operation of the system and timely measures to replenish or discharge the refrigerant. In addition, integrating the sight glass 60 and the drying filter 54 into the liquid reservoir 50 further saves space in the system and reduces the use of additional housings and fixing brackets, thereby improving the space utilization of the entire machine and reducing the weight of the entire machine.

[0044] In an optional embodiment, the microchannel heat exchanger includes a first manifold 31, a second manifold 32, and a flat tube 33 disposed between the first and second manifolds 31, 32. The flat tube 33 is connected to the first manifold 31 at one end and to the second manifold 32 at the other end. The inner wall of the flat tube 33 is provided with a capillary structure and / or microgrooves. Specifically, the first and second manifolds 31, 32 are disposed longitudinally of the microchannel heat exchanger, and the flat tube 33 is disposed transversely between the first and second manifolds 31, 32.

[0045] The capillary structure may include, but is not limited to, a columnar capillary structure. A columnar capillary structure refers to a series of longitudinally arranged columnar structures disposed on the inner wall of the flat tube 33. The columnar structures may be microcolumns, fibers, or tiny protrusions on the inner wall of the flat tube 33. The capillary structure improves the fluidity of the refrigerant, reduces the resistance and pressure drop of the refrigerant, and achieves more efficient refrigerant transmission, thereby enabling faster heat exchange and improving the heat exchange effect.

[0046] The micro-grooves can be distributed in a circular pattern along the inner wall of the flat tube 33, and the cross-section of the micro-grooves can be U-shaped, rectangular, trapezoidal, V-shaped, or arc-shaped. The size of the micro-grooves can be designed so that they also have a capillary effect. The width and depth of the micro-grooves can be appropriately sized based on the capillary force that can be generated when the fluid flows through the inner wall of the flat tube 33. For example, the width of the micro-grooves can be between a few microns and a few millimeters, and the depth of the micro-grooves can be between a few microns and tens of microns. In actual practice, the width and depth of the micro-grooves can be reasonably designed based on the properties of the refrigerant and actual needs.

[0047] In summary, this embodiment provides a capillary structure on the inner wall surface of the flat tube 33, and / or provides micro grooves on the inner wall surface of the flat tube 33, which can improve the fluidity of the refrigerant, reduce the resistance and pressure drop of the refrigerant, and achieve more efficient refrigerant transmission, so that the refrigerant can exchange heat faster and improve the heat exchange effect.

[0048] In an optional embodiment, there are multiple flat tubes 33, with fins disposed between adjacent flat tubes 33. The fins increase the heat transfer area outside the flat tubes 33, allowing heat within the flat tubes 33 to be transferred more quickly to the outside of the flat tubes 33. The multiple flat tubes 33 are arranged parallel and spaced apart along the longitudinal direction of the microchannel heat exchanger, with each flat tube 33 connected between the first header 31 and the second header 32. Between adjacent flat tubes 33, one end of the fin can be fixedly connected to the first header 31, and the other end can be fixedly connected to the second header 32. Furthermore, the fins can be streamlined, curved, or S-shaped. Specifically, streamlined fins have a streamlined shape with a smooth surface and no distinct edges or corners. Streamlined fins can reduce airflow resistance, facilitate airflow, and allow airflow to flow more smoothly through the fins, thereby improving heat transfer efficiency. Curved fins have a circular arc-shaped outer profile, which provides a larger heat transfer area than straight fins, making them more conducive to heat transfer. S-shaped fins are shaped like an S, either as a single S-curve or as a combination of multiple S-curves. Their wavy appearance provides a larger heat transfer area while enhancing the impact of airflow on the fins, resulting in stronger heat transfer capabilities. The specific fin type you choose can be determined based on your specific needs and application.

[0049] In an optional embodiment, the first manifold 31 is provided with an inlet connector 311, an outlet connector 312, and a first diversion hole 313. The inlet connector 311 and the outlet connector 312 are connected to different heights of the first manifold 31, and the first diversion hole 313 is used to connect the first manifold 31 with the flat tubes 33. The second manifold 32 is provided with a second diversion hole 321 corresponding to the first diversion hole 313, and the second diversion hole 321 is used to connect the second manifold 32 with the flat tubes 33. Specifically, the inlet connector 311 and the outlet connector 312 are provided along the height of the sidewall of the first manifold 31, with the inlet connector 311 provided above the outlet connector 312, and the outlet connector 312 provided on the sidewall of the first manifold 31 near the bottom. Multiple first diversion holes 313 are spaced apart on the sidewall of the first manifold 31, and multiple second diversion holes 321 are provided on the sidewall of the second manifold 32, corresponding one-to-one with the first diversion holes 313. The number of the flat tubes 33 corresponds to the number of the first diversion holes 313 and the second diversion holes 321 .

[0050] In an optional embodiment, a first partition 314 is provided within the first manifold 31. The first partition 314 divides the inner cavity of the first manifold 31 into a first upper chamber 315 and a first lower chamber 316. The inlet connector 311 is connected to the first upper chamber 315, and the outlet connector 312 is connected to the first lower chamber 316. Specifically, the first partition 314 matches the cross-section of the first manifold 31. The edge of the first partition 314 is welded to the inner wall edge of the first manifold 31. Its position can be reasonably adjusted based on the volume requirements of the first upper chamber 315 and the first lower chamber 316. Corresponding partitions can also be provided within the first upper chamber 315 and the first lower chamber 316 as required to separate the first upper chamber 315 and the first lower chamber 316 into corresponding sub-chambers. Optionally, the inlet connector 311 is provided in the middle of the first upper chamber 315, and the outlet connector 312 is provided at the bottom of the first lower chamber 316. The inlet connector 311 and the outlet connector 312 can be integral with the first manifold 31 or separate. The inlet connector 311 and the outlet connector 312 can be straight or curved, without limitation. Both the inlet connector 311 and the outlet connector 312 are mounted vertically on the sidewall of the first manifold 31.

[0051] In an optional embodiment, a second partition 322 is disposed within the second manifold 32, which divides the interior of the second manifold 32 into a second upper chamber 323 and a second lower chamber 324. Specifically, the second partition 322 matches the cross-section of the second manifold 32, and the edge of the second partition 322 is welded to the inner wall edge of the second manifold 32. Its position can be adjusted based on the volume requirements of the second upper chamber 323 and the second lower chamber 324. Corresponding partitions can also be disposed within the second upper chamber 323 and the second lower chamber 324 as needed to separate the second upper chamber 323 and the second lower chamber 324 into corresponding sub-chambers. Optionally, the first partition 314 and the second partition 322 have the same liquid level, and the corresponding first upper chamber 315 and the second upper chamber 323 have the same volume, and the first lower chamber 316 and the second lower chamber 324 also have the same volume.

[0052] The multiple flat tubes 33 disposed between the first and second manifolds 31, 32 are divided into two groups: a first group of flat tubes 33 and a second group of flat tubes 33. The number of flat tubes 33 in each group is correlated with the height of the first and second partitions 314, 322. The ends of the first group of flat tubes 33 extend into the first and second upper chambers 315, 323, respectively. The ends of the refrigerant flow passages of the first group of flat tubes 33 communicate with the first and second upper chambers 315, 323, respectively. The ends of the second group of flat tubes 33 extend into the first and second lower chambers 316, 324, respectively. The ends of the refrigerant flow passages of the second group of flat tubes 33 communicate with the first and second lower chambers 316, 324, respectively.

[0053] In an optional embodiment, a side plate 36 is further provided between the first manifold 31 and the second manifold 32, and the flat tubes 33 are fixed to the side plate 36. The side plate 36 can secure and support the flat tubes 33. The side plate 36 can be a flat metal plate. The flat tubes 33 can be fixed to the side plate 36 by welding to ensure a secure connection.

[0054] In an optional embodiment, the liquid reservoir 50 is disposed on the outside of the second manifold 32, and a first flow hole 51, a second flow hole 52, and a third flow hole 53 are sequentially provided between the liquid reservoir 50 and the second manifold 32 from top to bottom; the first flow hole 51 is used for gaseous refrigerant to flow into the liquid reservoir 50, the second flow hole 52 is used for liquid refrigerant to flow into the liquid reservoir 50, and the third flow hole 53 is used for refrigerant to flow back into the second manifold 32, that is, the refrigerant in the liquid reservoir 50 can flow back into the second manifold 32 through the third flow hole 53. The liquid reservoir 50 can be disposed on the outer wall of the second manifold 32 by welding. The first flow hole 51 and the second flow hole 52 can serve as the inlet of the liquid reservoir 50, and the third flow hole 53 can serve as the outlet of the liquid reservoir 50. Specifically, the first flow hole 51 and the second flow hole 52 are both provided on the sidewall of the second upper chamber 323, with the first flow hole 51 provided near the top of the second upper chamber 323 and the second flow hole 52 provided near the bottom of the second upper chamber 323. The gaseous refrigerant primarily flows into the liquid reservoir 50 through the first flow hole 51, while the liquid refrigerant primarily flows into the liquid reservoir 50 through the second flow hole 52. The gaseous refrigerant and the liquid refrigerant mix within the liquid reservoir 50. The third flow hole 53 is provided on the sidewall of the second lower chamber 324. The refrigerant within the liquid reservoir 50 can flow out of the liquid reservoir 50 through the third flow hole 53 to the second manifold 32, pass through the corresponding flat tube 33, and then flow out of the outlet connector 312. The third flow hole 53 can be provided at the bottom of the sidewall of the second lower chamber 324 to further facilitate the outflow of the refrigerant within the liquid reservoir 50.

[0055] In an optional embodiment, the drying filter 54 is disposed at the bottom of the liquid reservoir 50 , and the highest point of the third flow hole 53 is at least lower than the highest point of the drying filter 54 .

[0056] Specifically, the flow direction of the refrigerant in the condenser assembly 30 can be as follows: the refrigerant passes through the inlet joint of the microchannel heat exchanger → the first manifold → the first group of flat tubes → the first flow hole and the second flow hole (the gaseous refrigerant mainly flows out from the first flow hole, and the liquid refrigerant after condensation mainly flows out from the second flow hole) → the liquid reservoir → the drying filter → the third flow hole → the second manifold → the second group of flat tubes → the outlet joint of the microchannel heat exchanger.

[0057] In an optional embodiment, the battery thermal management unit with integrated electric drive and heat dissipation further includes a battery thermal management system, which includes a compressor 70, a plate heat exchanger 80, an expansion valve 90, a battery module liquid circulation system, and a condenser assembly 30. The refrigerant channels of the compressor 70, the condenser assembly 30, the expansion valve 90, and the plate heat exchanger 80 are sequentially connected by pipelines to form a refrigerant circulation loop. The condenser assembly 30 includes a refrigerant inlet 34 and a refrigerant outlet 35. The refrigerant outlet 35 is connected to the expansion valve 90, and the refrigerant inlet 34 is connected to the compressor 70. More specifically, the outlet of the compressor 70 is connected to the refrigerant inlet 34, the refrigerant outlet 35 is connected to the inlet of the expansion valve 90, the outlet of the expansion valve 90 is connected to the inlet of the plate heat exchanger 80, and the outlet of the plate heat exchanger 80 is connected to the inlet of the compressor 70. The battery module liquid circulation system is connected to the coolant channels of the plate heat exchanger 80 to form a first coolant circulation loop. The high-temperature coolant in the battery module liquid circulation system and the refrigerant flowing through the plate heat exchanger 80 undergo heat exchange at the plate heat exchanger 80, converting it into low-temperature coolant. Referring to Figure 3 , the refrigerant flow direction in the battery thermal management system is as follows: compressor → condenser assembly → expansion valve → plate heat exchanger → compressor. The high-temperature coolant in the battery module liquid circulation system passes through the plate heat exchanger 80 for heat exchange, converting it into low-temperature coolant. The coolant then flows back into the battery module liquid circulation system to dissipate heat for the battery system. It should be further explained that the battery thermal management system also includes an electric heating module, a temperature sensor 100, and an electronic control box 110. The electric heating module heats the coolant, providing heat to the battery in low-temperature environments to maintain a suitable operating temperature. The presence of the electric heating module can more comprehensively meet the application requirements of the battery environment and improve battery performance and reliability. The electric heating module, temperature sensor 100, and electronic control box 110 work together to control and maintain the battery's suitable operating temperature.

[0058] In an optional embodiment, the battery thermal management unit with integrated electric drive cooling also includes an electric drive cooling system, which includes a liquid circulation pipeline, a circulation pump, an electric drive module liquid circulation system, and an electric drive radiator 20. The electric drive module liquid circulation system is connected to the liquid circulation pipeline to form a second coolant circulation loop. The electric drive radiator 20 is a microchannel heat exchanger. The microchannel heat exchanger can be made of aluminum alloy, which has good thermal conductivity. Due to the high heat transfer efficiency of microchannel heat exchangers, the electric drive radiator 20 in this embodiment uses a microchannel heat exchanger to quickly dissipate heat from the electric drive components, helping to maintain the temperature of the electric drive components within a suitable range. In addition, the microchannel heat exchanger has a compact structure and occupies a small space, making it suitable for battery thermal management systems. The battery thermal management unit with integrated electric drive cooling provided in this embodiment can achieve diversified functions of the battery thermal management unit by integrating the electric drive cooling function. It also eliminates the need for a separate heat dissipation component to dissipate heat from the electric drive components, thereby reducing the overall size of the battery thermal management unit and making it more compact.

[0059] In an optional embodiment, the electric drive radiator 20 is provided with a liquid inlet 21 and a liquid outlet 22, the liquid inlet end of the circulation pump is connected to the liquid outlet of the electric drive module liquid circulation system through a liquid circulation pipeline, the liquid outlet end of the circulation pump is connected to the liquid inlet 21 of the electric drive radiator 20 through a liquid circulation pipeline, and the liquid outlet 22 of the electric drive radiator 20 is connected to the liquid inlet of the electric drive module liquid circulation system through a liquid circulation pipeline. Specifically, the high-temperature coolant in the electric drive module liquid circulation system enters the electric drive radiator 20 from the liquid inlet 21 of the electric drive radiator 20, and after being cooled to form a low-temperature coolant under the action of the airflow generated by the heat dissipation fan 40, it flows back to the electric drive module liquid circulation system from the liquid outlet 22 of the corresponding electric drive radiator 20 to dissipate heat for the electric drive components.

[0060] In an optional embodiment, an expansion tank is installed on the liquid circulation pipeline between the liquid inlet of the circulation pump and the liquid outlet of the electric drive module liquid circulation system. The expansion tank is used to regulate the pipeline pressure and achieve automatic liquid replenishment. The pipes 120 in both the battery thermal management system and the electric drive cooling system can be made of rubber hoses. These hoses have excellent flexibility and extrusion resistance, can adapt to bending and deformation, and have a certain degree of bending ability when subjected to external forces, thereby reducing the risk of pipeline rupture.

[0061] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this invention should be included in the scope of protection of the present invention. The scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An integrated battery thermal management unit for electric drive heat dissipation, characterized in that, Comprising: A housing; And An electric drive radiator, a condenser assembly, and a cooling fan disposed within the housing. The condenser assembly is located on one side of the electric drive radiator, and the cooling fan is located on the other side of the electric drive radiator. The cooling fan causes air to flow sequentially through the condenser assembly and the electric drive radiator.

2. The battery thermal management unit for integrated electric drive heat dissipation according to claim 1, wherein The condenser assembly includes a microchannel heat exchanger and a liquid receiver integrated on the microchannel heat exchanger. The liquid receiver is in communication with the microchannel heat exchanger.

3. The battery thermal management unit for integrated electric drive heat dissipation according to claim 2, characterized in that, The liquid receiver is integrated with a dryer filter, and / or the liquid receiver is integrated with a sight glass.

4. The battery thermal management unit for integrated electric drive heat dissipation according to claim 2 or 3, characterized in that, The microchannel heat exchanger includes a first header, a second header, and flat tubes disposed between the first header and the second header. One end of each flat tube is in communication with the first header, and the other end is in communication with the second header; The inner wall surface of the flat tube is provided with a capillary structure, and / or the inner wall surface of the flat tube is provided with microgrooves.

5. The battery thermal management unit for integrated electric drive heat dissipation according to claim 4, characterized in that, There are a plurality of the flat tubes, and fins are provided between adjacent two of the flat tubes; The fins are streamline-shaped, arc-shaped, or S-shaped.

6. The battery thermal management unit for integrated electric drive heat dissipation according to claim 4, wherein The liquid receiver is disposed outside the second header. A first flow hole, a second flow hole, and a third flow hole are sequentially provided from top to bottom between the liquid receiver and the second header; The first flow hole is for gaseous refrigerant to flow into the liquid receiver, the second flow hole is for liquid refrigerant to flow into the liquid receiver, and the third flow hole is for refrigerant To flow back into the second header.

7. The battery thermal management unit for integrated electric drive heat dissipation according to claim 1, wherein It further includes a battery thermal management system, which includes a compressor, a plate heat exchanger, an expansion valve, a battery module liquid circulation system, and the condenser assembly; The refrigerant channels of the compressor, the condenser assembly, the expansion valve, and the plate heat exchanger are sequentially connected by pipelines to form a refrigerant circulation loop; The condenser assembly includes a refrigerant inlet and a refrigerant outlet. The refrigerant outlet is connected to the expansion valve, and the refrigerant inlet is connected to the compressor; The battery module liquid circulation system is connected to the coolant channel of the plate heat exchanger to form a first coolant circulation loop.

8. The battery thermal management unit for integrated electric drive heat dissipation according to claim 1, characterized in that It further includes an electric drive cooling system, which includes a liquid circulation pipeline, a circulation pump, an electric drive module liquid circulation system, and the electric drive radiator; The electric drive module liquid circulation system is connected to the liquid circulation pipeline to form a second coolant circulation loop; The electric drive radiator is a microchannel heat exchanger.

9. The battery thermal management unit for integrated electric drive heat dissipation according to claim 8, characterized in that, The electric drive radiator is provided with a liquid inlet and a liquid outlet. The inlet end of the circulation pump is connected to the liquid outlet of the electric drive module liquid circulation system through the liquid circulation pipeline, the outlet end of the circulation pump is connected to the liquid inlet of the electric drive radiator through the liquid circulation pipeline, and the liquid outlet of the electric drive radiator is connected to the liquid inlet of the electric drive module liquid circulation system through the liquid circulation pipeline.

10. The battery thermal management unit for integrated electric drive heat dissipation according to claim 9, characterized in that, An expansion tank is provided on the liquid circulation pipeline between the inlet end of the circulation pump and the liquid outlet of the electric drive module liquid circulation system.

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