WO2025139060A1 - Electric drive heat dissipation-integrated battery thermal management unit - Google Patents

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

The present invention claims priority to a Chinese patent application filed with the Chinese Patent Office on December 25, 2023, with application number 202311810367.5 and application name “BATTLE THERMAL MANAGEMENT UNIT WITH INTEGRATED ELECTRIC DRIVE HEAT DISCHARGE”, the entire contents of which are incorporated herein by reference.

Technical Field

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 heat dissipation.

Background Art

At present, vehicle power batteries have the phenomenon of thermal runaway at high temperatures and easy attenuation of power at low temperatures; in order to ensure the continuous and normal operation of vehicle power batteries, a battery thermal management system is configured to provide a suitable operating temperature for vehicle power batteries. In addition, a large amount of heat is generated when the vehicle electric drive is working, and this heat needs to be dissipated in time, so an electric drive heat dissipation system is required to provide a suitable operating temperature for the vehicle electric drive.

In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

In the existing system, the battery thermal management system for dissipating heat for the vehicle's power battery and the electric drive cooling system for dissipating 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

The object of the present invention is to provide a battery thermal management unit with integrated electric drive heat dissipation, which can improve the problem in the prior art that the battery thermal management system and the electric drive heat dissipation system are independently set up, and both require separate fans, occupying more vehicle space, increasing the weight of the vehicle, and having high costs.

Technical Solutions

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

A battery thermal management unit with integrated electric drive heat dissipation, comprising:

a housing; and

An electric drive radiator, a condenser assembly and a heat dissipation fan are arranged in the shell, 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, and the air flows through the condenser assembly and the electric drive radiator in sequence through the heat dissipation fan.

Furthermore, the condenser assembly includes a microchannel heat exchanger and a liquid reservoir integrated on the microchannel heat exchanger, and the liquid reservoir is connected to the microchannel heat exchanger.

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

Further, 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 is connected to the first header, and the other end is connected to 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 micro grooves.

Furthermore, there are a plurality of flat tubes, and a fin is provided between two adjacent flat tubes;

The fins are streamlined, arc-shaped or S-shaped.

Further, the liquid reservoir is arranged outside the second manifold, and a first flow hole, a second flow hole and a third flow hole are arranged in sequence from top to bottom between the liquid reservoir and the second manifold;

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 header.

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

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;

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 cooling liquid channel of the plate heat exchanger to form a first cooling liquid circulation loop.

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;

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.

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 liquid circulation system of the electric drive module 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 liquid circulation system of the electric drive module through the liquid circulation pipeline.

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

Compared with the prior art, the battery thermal management unit with integrated electric drive and heat dissipation provided by the present invention has at least the following technical effects:

The battery thermal management unit with integrated electric drive heat dissipation provided by the present invention arranges the electric drive radiator, the condenser assembly and the heat dissipation fan in the same housing, wherein the condenser assembly is located in the electric drive heat dissipation unit. The heat dissipation fan is located on one side of the 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. 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

FIG1 is a schematic diagram of the structure of a battery thermal management unit with integrated electric drive heat dissipation in one embodiment;

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

FIG3 is a schematic diagram of the working principle of the refrigerant in a battery thermal management system in one embodiment.

Description of Figure Numbers:
10. Shell; 20. Electric drive radiator; 21. Liquid inlet; 22. Liquid outlet; 30. Condenser assembly; 40. Cooling fan; 31. First header; 311. Inlet connector; 312. Outlet connector; 313. First diverter hole; 314. First partition; 315. First upper chamber; 316. First lower chamber; 32. Second header; 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. Electric control box; 120. Pipeline.

Embodiments of the present invention

The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the invention are only for the purpose of describing specific embodiments and are not intended to limit the invention. In the following description, the expression "some embodiments" is involved, 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.

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 a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Please refer to Figure 1. An embodiment of the present invention provides a battery thermal management unit with integrated electric drive heat dissipation, including a housing 10, and an electric drive radiator 20, a condenser assembly 30, and a heat dissipation fan 40 disposed in 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 allows air to flow through the condenser assembly 30 and the electric drive radiator 20 in sequence. The electric drive radiator 20 and the condenser assembly 30 are both in the air inlet area of the heat dissipation fan 40, so that the airflow generated by the heat dissipation fan 40 can act on the electric drive radiator 20 and the condenser assembly 30 at the same time.

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, and 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 from 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.

In an optional embodiment, the condenser assembly 30, the electric drive radiator 20 and the heat dissipation fan 40 are arranged in parallel to reduce the resistance and pressure loss of the air flow, so that the heat dissipation fan 40 The generated airflow flows more smoothly through the condenser assembly 30 and the electric drive radiator 20, improving the cooling effect. It should be further explained that the heat dissipation fan 40 can adopt a heat dissipation fan 40 with stepless speed regulation, and the speed of the heat dissipation fan 40 can be accurately controlled according to actual thermal management requirements, making the entire unit more energy-efficient.

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, high reliability, etc. It can meet the requirements of small space and compact structure and is widely used in various occasions.

The channel size of the microchannel heat exchanger is small, and there is a corner at the end connection of the manifold and the flat tube, which makes the refrigerant produce a large flow resistance when flowing in the channel, thereby causing a large pressure drop of the refrigerant, affecting the heat exchange performance of the heat exchanger. In addition, the microchannel heat exchanger usually sets multiple flow channels in the flat tube 33 to increase the heat exchange area, but the increase in heat exchange area will lead to an increase in pressure drop, and the current microchannel heat exchanger still cannot balance the relationship between the heat exchange area and the pressure drop.

Therefore, please refer to FIG. 2 , in an optional embodiment, the condenser assembly 30 includes a microchannel heat exchanger and a liquid reservoir 50 integrated on the microchannel heat exchanger, and the liquid reservoir 50 is connected to the microchannel heat exchanger. In this embodiment, by integrating a liquid reservoir 50 on the microchannel heat exchanger, when the system does not need too much refrigerant, the excess refrigerant can be stored in the liquid reservoir 50 to maintain the system pressure at a normal level, and when more refrigerant is needed, the refrigerant in the liquid reservoir 50 can be added to the system to meet the needs of the system.

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 to improve the quality and purity of the refrigerant, extend the service life of the system, and ensure the reliability and stability of the system. Among them, the drying filter 54 includes a filter and a desiccant 542 arranged in the filter, and the filter can be a filter mesh 541, and the filter mesh 541 is surrounded to form a cylindrical structure, and the desiccant 542 is installed in the cylindrical structure. Of course, the drying filter 54 can be in other forms. Furthermore, the desiccant 542 can be calcium sulfate, calcium chloride or activated alumina, etc., and the above substances 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, Improve system reliability.

In an optional embodiment, the liquid reservoir 50 is integrated with a sight glass 60. Specifically, the sight glass 60 is arranged at the bottom of the liquid reservoir 50. With the sight glass 60 integrated on the liquid reservoir 50, the state of the refrigerant can be easily 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 on 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 whole machine and reducing the weight of the whole machine.

In an optional embodiment, the microchannel heat exchanger includes a first header 31, a second header 32, and a flat tube 33 disposed between the first header 31 and the second header 32, one end of the flat tube 33 is connected to the first header 31, and the other end is connected to the second header 32; the inner wall surface of the flat tube 33 is provided with a capillary structure, and/or the inner wall surface of the flat tube 33 is provided with micro grooves. Specifically, the first header 31 and the second header 32 are respectively disposed along the longitudinal direction of the microchannel heat exchanger, and the flat tube 33 is transversely disposed between the first header 31 and the second header 32.

The capillary structure may be, but is not limited to, a columnar capillary structure, which refers to a series of columnar structures arranged longitudinally on the inner wall surface of the flat tube 33, and the columnar structure may be microcolumns, fibers, and tiny protrusions on the inner wall surface of the flat tube 33. The capillary structure may 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 perform heat exchange faster and improve the heat exchange effect.

The micro grooves can be distributed in a circular shape 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. Among them, the size of the micro grooves can be designed so that the micro grooves also have a capillary effect, and the width and depth of the micro grooves can be appropriate according to the capillary force that can be formed 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 the actual process, the width and depth of the micro grooves can be reasonably designed in combination with the properties of the refrigerant and actual needs.

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, so as to 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.

In an optional embodiment, there are multiple flat tubes 33, and fins are arranged between two adjacent flat tubes 33. The fins can increase the heat transfer area outside the flat tubes 33, so that the heat in the flat tubes 33 can be transferred to the outside of the flat tubes 33 more quickly. Among them, multiple flat tubes 33 are arranged in parallel and at intervals along the longitudinal direction of the microchannel heat exchanger, and each flat tube 33 is 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 is fixedly connected to the second header 32. Further, the fin can be streamlined, arc-shaped or S-shaped. Specifically, the streamlined fin presents a streamlined shape with a smooth surface and no obvious edges and corners. The streamlined fin can reduce the resistance of the airflow when it flows, help the flow of the airflow, and make the airflow pass through the fin more smoothly, thereby improving the heat transfer efficiency. The arc-shaped fin has an outer contour of an arc curve. Compared with the straight fin, the arc-shaped fin has a larger heat transfer area, which is more conducive to the transfer of heat. The S-shaped fin is in an S-shaped shape, which can be a single S-shaped curve or a combination of multiple S-shaped curves. The S-shaped fin has a wavy appearance, which has a large heat transfer area and can enhance the impact of the airflow on the fin, making it have a stronger heat transfer capacity. The specific form of fin can be selected according to actual needs and application conditions.

In an optional embodiment, the first manifold 31 is provided with an inlet joint 311, an outlet joint 312 and a first diverter hole 313. The inlet joint 311 and the outlet joint 312 are respectively connected to positions at different heights of the first manifold 31. The first diverter hole 313 is used to connect the first manifold 31 and the flat tube 33. The second manifold 32 is provided with a second diverter hole 321 corresponding to the first diverter hole 313. The second diverter hole 321 is used to connect the second manifold 32 and the flat tube 33. Specifically, the inlet joint 311 and the outlet joint 312 are provided on the side wall of the first manifold 31 in the height direction. The inlet joint 311 is provided above the outlet joint 312, and the outlet joint 312 is provided on the side wall of the first manifold 31 near the bottom. A plurality of first diverter holes 313 are provided at intervals on the side wall of the first manifold 31, and a plurality of second diverter holes 321 corresponding to the first diverter holes 313 are provided on the side wall of the second manifold 32. flat tube The number 33 corresponds to the number of the first diversion holes 313 and the second diversion holes 321 .

In an optional embodiment, a first partition 314 is provided in the first manifold 31, and 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 joint 311 is connected to the first upper chamber 315, and the outlet joint 312 is connected to the first lower chamber 316. Specifically, the first partition 314 matches the cross section of the first manifold 31, and the edge of the first partition 314 is connected to the inner wall edge of the first manifold 31 by welding, and its position can be reasonably adjusted according to the volume requirements of the first upper chamber 315 and the first lower chamber 316. Corresponding partitions can also be provided in the first upper chamber 315 and the first lower chamber 316 according to requirements to separate the first upper chamber 315 and the first lower chamber 316 to form corresponding sub-chambers. Optionally, the inlet joint 311 is provided in the middle of the first upper chamber 315, and the outlet joint 312 is provided at the bottom of the first lower chamber 316. The inlet connector 311 and the outlet connector 312 can be an integral structure with the first manifold 31 or a separate structure. The inlet connector 311 and the outlet connector 312 can be straight pipes or curved pipes, which are not limited here. The inlet connector 311 and the outlet connector 312 are both vertically installed on the side wall of the first manifold 31.

In an optional embodiment, a second partition 322 is provided in the second manifold 32, and the second partition 322 divides the inner cavity 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 connected to the inner wall edge of the second manifold 32 by welding, and its position can be reasonably adjusted according to the volume requirements of the second upper chamber 323 and the second lower chamber 324. Corresponding partitions can also be provided in the second upper chamber 323 and the second lower chamber 324 according to requirements to separate the second upper chamber 323 and the second lower chamber 324 into corresponding sub-chambers. Optionally, the liquid level heights of the first partition 314 and the second partition 322 are the same, 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.

The plurality of flat tubes 33 disposed between the first manifold 31 and the second manifold 32 are divided into two groups, namely the first group of flat tubes 33 and the second group of flat tubes 33. The corresponding number of flat tubes 33 in the first group of flat tubes 33 and the second group of flat tubes 33 is associated with the height positions of the first partition 314 and the second partition 322. The two ends of the first group of flat tubes 33 extend into the first upper chamber 315 and the second upper chamber 323 respectively. Accordingly, the refrigerant flow channel of the first group of flat tubes 33 is The two ends are respectively connected to the first upper chamber 315 and the second upper chamber 323. The two ends of the second group of flat tubes 33 extend into the first lower chamber 316 and the second lower chamber 324 respectively. Correspondingly, the two ends of the refrigerant flow channel of the second group of flat tubes 33 are respectively connected to the first lower chamber 316 and the second lower chamber 324.

In an optional embodiment, a side plate 36 is further provided between the first header 31 and the second header 32, and the flat tubes 33 are fixed on the side plate 36. The side plate 36 can fix and support the flat tubes 33. The side plate 36 can be a flat metal plate. The flat tubes 33 can be fixed on the side plate 36 by welding to ensure that they are firmly connected together.

In an optional embodiment, the liquid reservoir 50 is arranged on the outer side of the second manifold 32, and a first flow hole 51, a second flow hole 52 and a third flow hole 53 are sequentially arranged between the liquid reservoir 50 and the second manifold 32 from top to bottom; the first flow hole 51 is used for the gaseous refrigerant to flow into the liquid reservoir 50, the second flow hole 52 is used for the liquid refrigerant to flow into the liquid reservoir 50, and the third flow hole 53 is used for the 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 arranged on the outer side 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 arranged on the side wall of the second upper chamber 323, and the first flow hole 51 is arranged near the top of the second upper chamber 323, and the second flow hole 52 is arranged near the bottom of the second upper chamber 323. The gaseous refrigerant mainly flows into the liquid reservoir 50 through the first flow hole 51, and the liquid refrigerant mainly flows into the liquid reservoir 50 through the second flow hole 52. The gaseous refrigerant and the liquid refrigerant are mixed in the liquid reservoir 50. The third flow hole 53 is arranged on the side wall of the second lower chamber 324. The refrigerant in the liquid reservoir 50 can flow out of the liquid reservoir 50 to the second manifold 32 through the third flow hole 53, and then flow out from the outlet joint 312 after passing through the corresponding flat tube 33. The third flow hole 53 can be arranged at the bottom of the side wall of the second lower chamber 324, which is more convenient for the refrigerant in the liquid reservoir 50 to flow out.

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 .

Specifically, the flow direction of the refrigerant in the condenser assembly 30 may be as follows: 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) → liquid reservoir → drying filter → the third flow hole → the second manifold → the second group of flat tubes → the outlet joint of the microchannel heat exchanger.

In an optional embodiment, the battery thermal management unit with integrated electric drive 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 through 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 channel 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 are heat exchanged at the plate heat exchanger 80, thereby converting into a low-temperature coolant. Please refer to Figure 3. The flow direction of the refrigerant in the battery thermal management system is as follows: compressor → condenser assembly → expansion valve → plate heat exchanger → compressor. The high-temperature coolant carried by the battery module liquid circulation system is passed into the plate heat exchanger 80 for heat exchange, converted into a low-temperature coolant, and then returned to the battery module liquid circulation system for heat dissipation of 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 electric control box 110. The electric heating module can provide the function of cooling the coolant and provide heat to the battery in a low-temperature environment to maintain the appropriate working temperature of the battery. The existence of the electric heating module can more comprehensively meet the application requirements of the battery environment and improve the performance and reliability of the battery. The electric heating module, the temperature sensor 100 and the electric control box 110 work together to control and maintain the appropriate working temperature of the battery.

In an optional embodiment, 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 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. Heater. The microchannel heat exchanger can be made of aluminum alloy, which has good thermal conductivity. Since the microchannel heat exchanger has a high heat transfer efficiency, the electric drive radiator 20 in this embodiment uses a microchannel heat exchanger to quickly discharge heat from the electric drive components, which helps to keep the temperature of the electric drive components within an appropriate range. In addition, the microchannel heat exchanger has a compact structure and occupies a small space, and is suitable for battery thermal management systems. The battery thermal management unit with integrated electric drive heat dissipation provided in this embodiment can realize the functional diversification of the battery thermal management unit by integrating the electric drive heat dissipation function, and there is no need to use an additional independent heat dissipation component to dissipate the heat of the electric drive components, thereby reducing the overall volume of the battery thermal management unit and making it more miniaturized.

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 down 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.

In an optional embodiment, an expansion water tank is provided on the liquid circulation pipeline between the liquid inlet of the circulation pump and the liquid outlet of the liquid circulation system of the electric drive module, and the expansion water tank is used to adjust the pipeline pressure and realize automatic liquid replenishment. The pipeline 120 in the battery thermal management system and the electric drive cooling system can both use rubber hoses, which have good flexibility and anti-extrusion performance, can adapt to the bending and deformation of the pipeline, and have a certain bending ability when subjected to external forces, thereby reducing the risk of pipeline rupture.

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

Claims (10)

A battery thermal management unit with integrated electric drive and heat dissipation, characterized by comprising: a housing; and An electric drive radiator, a condenser assembly and a heat dissipation fan are arranged in the shell, 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, and the air flows through the condenser assembly and the electric drive radiator in sequence through the heat dissipation fan. The battery thermal management unit with integrated electric drive and heat dissipation according to claim 1 is characterized in that the condenser assembly includes a microchannel heat exchanger and a liquid reservoir integrated on the microchannel heat exchanger, and the liquid reservoir is connected to the microchannel heat exchanger. The battery thermal management unit with integrated electric drive and heat dissipation according to claim 2 is characterized in that the liquid reservoir is integrated with a drying filter, and/or the liquid reservoir is integrated with a sight glass. The battery thermal management unit with integrated electric drive and heat dissipation according to claim 2 or 3 is characterized in that the microchannel heat exchanger includes a first header, a second header, and a flat tube arranged between the first header and the second header, one end of the flat tube is connected to the first header, and the other end is connected to 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 micro grooves. The battery thermal management unit with integrated electric drive and heat dissipation according to claim 4 is characterized in that there are multiple flat tubes, and fins are provided between two adjacent flat tubes; The fins are streamlined, arc-shaped or S-shaped. The battery thermal management unit with integrated electric drive and heat dissipation according to claim 4 is characterized in that the liquid reservoir is arranged on the outside of 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; 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 return to the liquid reservoir. Flows into the second header. The battery thermal management unit with integrated electric drive and heat dissipation according to claim 1 is characterized in that it 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; 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; 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 cooling liquid channel of the plate heat exchanger to form a first cooling liquid circulation loop. The battery thermal management unit with integrated electric drive heat dissipation according to claim 1 is characterized in that it also includes an electric drive heat dissipation system, the electric drive heat dissipation system 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. The battery thermal management unit with integrated electric drive heat dissipation according to claim 8 is characterized in that 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 liquid circulation system of the electric drive module 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 liquid circulation system of the electric drive module through the liquid circulation pipeline. The battery thermal management unit with integrated electric drive heat dissipation according to claim 9 is characterized in that 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.