A microchannel condenser for heat dissipation of energy storage batteries

Abstract

The present invention relates to the technical field of heat dissipation of energy storage batteries, and discloses a microchannel condenser for heat dissipation of energy storage batteries, comprising a condenser body arranged in an energy storage battery cabinet, wherein the energy storage battery cabinet is further provided with a liquid-cooled battery pack, a plate heat exchanger, a compressor, a condensate pump, and an air pump. A fan is provided on the surface of the condenser body, and the condenser body is sequentially connected to the plate heat exchanger, the compressor, and the condensate pump via working medium circulation pipelines to form a circulation loop. The condenser body comprises: This condenser body solves the problems of gas-liquid two-phase flow distribution, high liquid phase retention, low-temperature liquid hammer, channel blockage, etc. of the microchannel condenser, and significantly improves the heat dissipation efficiency, environmental adaptability, and long-term operation stability of the energy storage battery thermal management system.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of energy storage batteries, and in particular to a microchannel condenser for heat dissipation of energy storage batteries. Background Art

[0002] In the energy storage battery liquid cooling system, the microchannel condenser plays a core role in condensing the high-temperature gaseous refrigerant discharged from the compressor to release heat. Traditional multi-pass microchannel condensers have two major structural defects:

[0003] 1. Imbalanced distribution of gas-liquid two-phase flow: When the refrigerant enters the gas-liquid mixed state after the second process, the liquid component is retained at the bottom of the manifold due to gravity, resulting in uneven flow in each flat tube, causing local "condensation deterioration" and resulting in a decrease in heat exchange efficiency;

[0004] 2. Weak anti-clogging ability: The louvered fins added to compensate for insufficient efficiency temporarily increase the heat exchange area, but they intensify dust absorption, not only increasing cleaning and maintenance costs but also causing the system's COP to continue to deteriorate.

[0005] These defects cause the cooling energy consumption of the energy storage system to remain high, seriously restricting the thermal safety and cycle life of the battery pack. Summary of the Invention

[0006] The object of the present invention is to provide a microchannel condenser for heat dissipation of energy storage batteries, aiming to solve the problems in the prior art.

[0007] The present invention is implemented as follows: a microchannel condenser for heat dissipation of energy storage batteries, comprising a condenser body disposed in an energy storage battery cabinet. The energy storage battery cabinet is also provided with a liquid-cooled battery pack, a plate heat exchanger, a compressor, a condensate pump, and an air pump. A fan is provided on the surface of the condenser body, and the condenser body is sequentially connected to the plate heat exchanger, the compressor, and the condensate pump via working medium circulation pipelines to form a circulation loop. The condenser body comprises:

[0008] Two parallel manifolds;

[0009] A plurality of flat tubes connected between the two manifolds, wherein microchannels are provided in the flat tubes, and both ends of the flat tubes extend into the interior of the two manifolds respectively;

[0010] At least two baffles are provided in each manifold along its length, and the baffles in the two manifolds are alternately staggered in the horizontal direction to divide the manifold into multiple series-connected flows.

[0011] A perforated plate is vertically installed in each manifold, and the perforated plate is provided with distribution holes communicating with the flat tube microchannels;

[0012] A dynamic adjustment component located at the refrigerant inlet end of the final process is used to automatically adjust its flow cross-sectional area in response to the refrigerant temperature.

[0013] Preferably, the baffle separates the collecting pipe along its axial direction into a first flow, a second flow, a third flow, a fourth flow and a fifth flow in series, and the refrigerant flows through the first flow to the fifth flow in sequence. The flow in each collecting pipe is connected end to end with the microchannel of the flat tube through the distribution hole to form a serpentine flow.

[0014] Preferably, the orifice plate is arranged in the second to fifth flows, and the number of distribution holes below the orifice plate increases step by step from the second to fifth flows, so as to improve the liquid phase circulation efficiency.

[0015] Preferably, the diameter of the distribution holes decreases step by step from the second process to the fifth process, so that the liquid phase flow rate is increased by changing the cross-sectional area and gravity sedimentation is suppressed.

[0016] Preferably, the collecting pipe further comprises:

[0017] An air inlet pipe located at the inlet end of the first process, for introducing gaseous refrigerant;

[0018] The liquid outlet pipe located at the outlet end of the fifth process is used to discharge the subcooled liquid refrigerant.

[0019] Preferably, the condenser body is installed at an angle of 5°-8° along the refrigerant flow direction, using gravity to assist the liquid flow;

[0020] The bottom side of the perforated plate facing away from the flat tube is sprayed with a PTFE hydrophobic coating to reduce liquid adhesion and retention.

[0021] Preferably, the dynamic adjustment component comprises a sealed adjustment chamber; a guide seat is provided inside the chamber, a pressure guide plate is slidably provided on the guide seat, and the pressure guide plate has a chamfered working end;

[0022] a plurality of top cones disposed in the regulating chamber and corresponding to the distribution holes;

[0023] When the pressure guide plate slides along the guide seat, the chamfered working end portion thereof can cause the top cone to move into the corresponding distribution hole to partially block the distribution hole.

[0024] Preferably, the dynamic adjustment component further includes a conducting tube connected to the end of the adjustment chamber, the conducting tube passes through and extends to the outside of the end of the collecting pipe, and is used to be connected to the compressed air source of the air pump.

[0025] Preferably, a memory spring is provided in the adjustment chamber, one end of the memory spring is fixedly connected to the guide seat, and the other end is fixedly connected to the pressure guide plate;

[0026] The memory spring is a two-way shape memory alloy spring, and its length can expand and contract in response to changes in the temperature of the refrigerant in the collecting pipe.

[0027] Preferably, at least one conducting sheet is provided in the regulating chamber;

[0028] Each conducting plate is fixedly connected to a plurality of top rods penetrating the wall of the regulating chamber;

[0029] The portion of each push rod located outside the regulating chamber is provided with a limiting ring;

[0030] A reset spring is sleeved on the portion of each push rod located inside the regulating chamber. The reset spring acts between the inner wall of the regulating chamber and the conducting piece or the push rod to provide a reset force to separate the top cone from the distribution hole.

[0031] Preferably, the top cone is fixedly connected to the end of the top rod located in the adjustment chamber;

[0032] An air passage is provided inside the top cone and the top rod, and the air passage is connected to the inside of the regulating chamber;

[0033] The end of the top cone is an expandable three-petal structure.

[0034] Preferably, the upper surface of the chamfered working end of the pressure guide plate is provided with a plurality of protruding strips;

[0035] A chamfered guide groove matching the protruding strip is provided on one side of the conducting piece facing the pressure guide plate.

[0036] The present invention discloses a microchannel condenser for heat dissipation of energy storage batteries, which has the following beneficial effects:

[0037] 1. This solution maximizes the condensation efficiency of the gaseous refrigerant through a serpentine five-process design and a microchannel flat tube structure, effectively transferring heat from the liquid-cooled battery pack to the environment. It can also dynamically increase the number of distribution holes and reduce the hole diameter according to the gas-liquid ratio of each process, ensuring uniform distribution of the gas phase, increasing the liquid phase flow rate to overcome viscosity, inhibiting gravity sedimentation, and significantly reducing liquid phase aggregation and retention.

[0038] 2. This solution also features dynamic temperature adjustment. Based on the intelligent component of the two-way memory spring, it automatically responds to changes in refrigerant temperature: at high temperatures, the memory spring contracts, increasing the flow area and improving flow, preventing system overheating and collapse; at low temperatures, the memory spring expands, reducing the flow area and increasing system pressure, completely eliminating the risk of compressor liquid hammer and ensuring low-temperature reliability; in the event of failure, the memory spring defaults to low-temperature protection mode.

[0039] 3. When an abnormal pressure drop in the final stage is detected, the air pump activates high-pressure mode and injects high-pressure gas into the blocked distribution holes or microchannels through the internal air passage of the top cone and the expandable three-petal cone head to forcefully clear them. The contact structure between the pressure guide plate and the guide plate generates high-frequency micro-vibrations during the adjustment process to assist the top cone in clearing attachments in the holes. During normal operation, the air pump maintains a small pressure difference between the adjustment chamber and the manifold to prevent refrigerant from escaping.

[0040] 4. This condenser body solves the problems of microchannel condenser in gas-liquid two-phase flow distribution, high liquid phase retention, low-temperature liquid hammer, channel blockage, etc., and significantly improves the heat dissipation efficiency, environmental adaptability and long-term operation stability of the energy storage battery thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the installation of a microchannel condenser for heat dissipation of energy storage batteries provided by an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of a microchannel condenser for heat dissipation of energy storage batteries provided by an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the internal structure of a microchannel condenser manifold for heat dissipation of an energy storage battery provided by an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of a process flow of a microchannel condenser for heat dissipation of an energy storage battery provided by an embodiment of the present invention;

[0045] Figure 5 This is an embodiment of the present invention Figure 4 A local enlarged structural diagram in FIG.

[0046] Figure 6 It is a schematic internal view of a dynamic adjustment component of a microchannel condenser for heat dissipation of energy storage batteries provided by an embodiment of the present invention.

[0047] Marking Description:

[0048] 1. Energy storage battery cabinet; 2. Liquid-cooled battery pack; 3. Plate heat exchanger; 4. Compressor; 5. Condensate pump; 6. Air pump; 7. Condenser body; 8. Fan;

[0049] 71. Manifold; 72. Flat tube; 73. Orifice plate; 74. Baffle; 75. Dynamic adjustment assembly; 76. Conducting tube; 77. Memory spring; 78. Conducting plate;

[0050] 711, air inlet pipe; 712, liquid outlet pipe; 713, first process; 714, second process; 715, third process; 716, fourth process; 717, fifth process;

[0051] 731. Distribution hole; 751. Guide seat; 752. Pressure guide plate; 753. Protruding strip; 781. Ejector rod; 782. Ejector cone; 783. Limiting ring; 784. Return spring. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0053] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0054] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0055] In this embodiment:

[0056] Reference Figure 1-Figure 2 As shown, a preferred embodiment of the present invention is provided.

[0057] A microchannel condenser for heat dissipation of energy storage batteries in this embodiment includes a condenser body 7 disposed within an energy storage battery cabinet 1. The energy storage battery cabinet 1 also includes a liquid-cooled battery pack 2, a plate heat exchanger 3, a compressor 4, a condensate pump 5, and an air pump 6. A fan 8 is provided on the surface of the condenser body 7. The condenser body 7 is sequentially connected to the plate heat exchanger 3, the compressor 4, and the condensate pump 5 via working fluid circulation pipelines to form a circulation loop, achieving a closed circulation flow of refrigerant within the system and transferring heat generated by the liquid-cooled battery pack 2 to the environment through phase change heat transfer.

[0058] The condenser body 7 includes:

[0059] Two parallel manifolds 71;

[0060] A plurality of flat tubes 72 connected between the two manifolds 71 ​​, each having microchannels therein, and both ends of the flat tubes 72 extending into the interior of the two manifolds 71 ​​;

[0061] The manifold 71 further includes: an air inlet pipe 711 located at the inlet end of the first flow path 713 for introducing gaseous refrigerant; and a liquid outlet pipe 712 located at the outlet end of the fifth flow path 717 for discharging supercooled liquid refrigerant.

[0062] exist Figure 3 In the embodiment, at least two baffles 74 are provided in each manifold 71 along the length direction. The baffles 74 in the two manifolds 71 ​​are alternately staggered in the horizontal direction to divide the manifold 71 into a plurality of series flows. The baffles 74 divide the manifold 71 along its axial direction into a first flow path 713, a second flow path 714, a third flow path 715, a fourth flow path 716 and a fifth flow path 717 in series. The refrigerant flows through the first flow path 713 to the fifth flow path 717 in sequence. The flows in each manifold 71 pass through the distribution holes 731. The microchannels of the flat tubes 72 are connected end to end to form a serpentine flow process, so that after the gaseous refrigerant enters one of the manifolds 71 ​​through the inlet pipe 711, it can enter the other manifold 71 along the microchannels of the flat tubes 72 under the action of the baffle 74, and then continue along the microchannels of the flat tubes 72 to return to the original manifold 71 under the action of the baffle 74 of the other manifold 71. After completing the five-step process, the gaseous refrigerant becomes liquid or a gas-liquid mixed state and is discharged from the liquid outlet pipe 712.

[0063] A perforated plate 73 is vertically mounted within each manifold 71 . The perforated plate 73 is provided with distribution holes 731 that communicate with the microchannels of the flat tubes 72 . The perforated plates 73 are positioned within the second flow path 714 to the fifth flow path 717 , and the number of distribution holes 731 below the perforated plates 73 increases progressively from the second flow path 714 to the fifth flow path 717 (i.e., the fifth flow path 717 > the fourth flow path 716 > the third flow path 715 > the second flow path 714 ). This improves liquid phase circulation efficiency, which is determined by the refrigerant phase change characteristics and the laws of fluid dynamics.

[0064] The gaseous refrigerant gradually condenses into liquid after entering the first process 713;

[0065] When entering the second process 714, the saturated vapor is dominant, and the liquid phase accounts for 30%-40%. At this time, the liquid phase has low viscosity and is easy to distribute evenly.

[0066] When entering the third process 715, it is in a gas-liquid mixed state, with the liquid phase accounting for 40%-60%, and obvious gravity stratification;

[0067] When entering the fourth process 716, the liquid phase accounts for 60%-75%, and at this time, the viscosity is high and it is easy to be retained;

[0068] When entering the fifth process 717, it is in a supercooled liquid state, with the liquid phase accounting for more than 90%, and the fluidity becomes poor;

[0069] Therefore, when the gas phase accounts for a high proportion during different processes, the flow rate is fast, and a small number of distribution holes 731 can evenly distribute the flow rate and also increase the flow rate to prevent stratification;

[0070] When the liquid phase accounts for a high proportion, the flow rate is slow and the viscosity is high, and more distribution holes 731 need to be opened at the bottom of the orifice plate 73. At this time, the gas phase flows out from the sparse holes at the top and the liquid phase is injected from the dense holes at the bottom to avoid the gas phase rushing to flow, to deal with high-viscosity fluids dominated by the liquid phase, and to prevent bottom retention caused by the accumulation of liquid refrigerant.

[0071] It is worth noting that the aperture of the distribution hole 731 decreases step by step from the second process 714 to the fifth process 717. The liquid phase flow rate is increased by changing the cross-sectional area. The small aperture increases the flow rate, overcomes the liquid phase viscosity, and inhibits gravity sedimentation. Moreover, when the total flow rate of the later process decreases, the small aperture will not cause a surge in the global pressure drop.

[0072] The baffles 74 of each flow path are in close contact with the lower portion of the distribution hole 731 at the bottom of the orifice plate 73 , thereby preventing a dead zone from forming in the manifold 71 and causing the retention of liquid refrigerant.

[0073] In this embodiment, in addition to the improvement of the structure of the condenser body 7 itself, in actual application, the condenser body 7 is installed at an angle of 5°-8° along the refrigerant flow direction, and the effect of gravity can be used to assist the liquid flow; and the bottom side of the orifice plate 73 facing away from the flat tube 72 is sprayed with a PTFE hydrophobic coating to reduce liquid adhesion and retention and improve the efficiency of liquid flow.

[0074] exist Figure 4-Figure 6 In the embodiment, the dynamic adjustment component 75 located at the refrigerant inlet end of the final stage process is used to automatically adjust its flow cross-sectional area in response to the refrigerant temperature;

[0075] The dynamic adjustment assembly 75 includes a sealed adjustment chamber; a guide seat 751 is provided inside the chamber, and a pressure guide plate 752 is slidably provided on the guide seat 751. The pressure guide plate 752 has a chamfered working end.

[0076] A plurality of top cones 782 disposed in the regulating chamber and corresponding to the distribution holes 731;

[0077] At least one conductive piece 78 is provided in the regulating chamber;

[0078] A number of top rods 781 penetrating the wall of the regulating chamber are fixedly connected to each conducting plate 78. A limiting ring 783 is provided on the part of each top rod 781 located outside the regulating chamber. A reset spring 784 is provided on the part of each top rod 781 located inside the regulating chamber. The reset spring 784 acts between the inner wall of the regulating chamber and the conducting plate 78 or the top rod 781 to provide a reset force to disengage the top cone 782 from the distribution hole 731.

[0079] The dynamic adjustment assembly 75 further includes a conducting tube 76 connected to the end of the adjustment chamber. The conducting tube 76 penetrates and extends to the outside of the end of the manifold 71 and is used to connect to the compressed air source of the air pump 6. During normal operation of the energy storage battery cabinet 1, the air pump 6 is used to control the internal pressure of the adjustment chamber through the conducting tube 76 to keep the internal pressure of the adjustment chamber and the internal pressure of the manifold 71 equal (the air pump 6 maintains the pressure difference between the adjustment chamber and the manifold ≤ 0.05 MPa when the system pressure is less than 1.5 MPa), thereby preventing the gas-phase refrigerant in the manifold 71 from escaping through the adjustment chamber.

[0080] When the distribution hole 731 of the final process or the microchannel of the flat tube 72 is clogged, the air pump 6 can increase a certain pressure inside it (when it is detected that the pressure drop of the fifth process 717 due to abnormal flow and temperature is greater than 0.5MPa, the fifth process 717 pressure is started and a high pressure of 0.3MPa is added for 10 seconds to clear the blockage), which can effectively clear the blockage.

[0081] When the pressure guide plate 752 slides along the guide seat 751, its chamfered working end can move the top cone 782 into the corresponding distribution hole 731 to partially block the distribution hole 731. In order to enable the pressure guide plate 752 to slide on the guide seat 751 according to the temperature, a memory spring 77 is provided in the adjustment chamber. One end of the memory spring 77 is fixedly connected to the guide seat 751, and the other end is fixedly connected to the pressure guide plate 752. The memory spring 77 is a two-way shape memory alloy spring made of Nitinol. Its length can expand and contract in response to changes in the refrigerant temperature in the manifold 71.

[0082] When the temperature rises (the liquid-cooled battery pack 2 continues to work and produces high temperature or works in a high-temperature environment), the memory spring 77 contracts, pulling the pressure guide plate 752 to move along the direction of the conductive tube 76, which causes the conductive piece 78 to lose the squeezing effect of the pressure guide plate 752 and be exerted with a reaction force by the return spring 784, pulling the top rod 781 connected to the conductive piece 78 toward the adjustment chamber, thereby causing the top cone 782 to disengage from the distribution hole 731, increasing the flow cross-sectional area, improving the flow rate, and preventing the heat dissipation system from overheating and collapsing.

[0083] When the temperature drops (when the liquid-cooled battery pack 2 is partially operating, gradually stopping operation, or operating in a low-temperature environment), the memory spring 77 expands, pushing the pressure guide plate 752 away from the guide tube 76. The pressure guide plate 752 uses its chamfered working end to move the pressure-reducing push rod 781 of the guide plate 78 toward the perforated plate 73, inserting the top cone 782 into the distribution hole 731 (not completely blocking the distribution hole 731, maintaining a flow area of ​​40%-60%). This reduces the flow cross-sectional area and increases the internal pressure, completely eliminating the risk of liquid hammer in the compressor 4 and ensuring the reliability of the heat dissipation system in low-temperature environments.

[0084] It is worth noting that the top cone 782 is fixedly connected to the end of the top rod 781 located in the regulating chamber; an air passage is opened inside the top cone 782 and the top rod 781, and the air passage is connected to the inside of the regulating chamber; the end of the top cone 782 is an expandable three-petal elastic structure. In this three-petal elastic structure, the cone head of the top cone 782 is in a closed conical state in the default state (the sealing surface pressure when the cone head is closed is greater than 15N / mm 2 , and uses the air pump 6 to balance the pressure difference between the airway and the manifold 71). When the top cone 782 is inserted into the distribution hole 731, under the action of the air pump 6, the pressure inside the regulating chamber increases, and then the cone head of the top cone 782 is pushed open (the three-petal cone head is expanded when the pressure in the regulating chamber is greater than 0.8MPa, forming a 0.3-0.5mm gap for air flow to pass through). During the opening process, the cone head of the top cone 782 can clear the blocked distribution hole 731 again, and can also inject high-pressure gas into the microchannel of the flat tube 72 through the distribution hole 731 to flush out the refrigerant blocked inside it.

[0085] When the memory spring 77 fails, the top cone 782 defaults to being inserted into the distribution hole 731 to prevent the risk of low-temperature liquid shock.

[0086] It is worth noting that the upper surface of the chamfered working end of the pressure guide plate 752 is provided with a plurality of protruding protrusions 753; the side of the conductive sheet 78 facing the pressure guide plate 752 is provided with a chamfered guide groove that cooperates with the protrusions 753. In the process of the pressure guide plate 752 pushing the top cone 782 into the distribution hole 731 through the chamfered working end, the protrusions 753 and the chamfered guide groove of the conductive sheet 78 will continuously generate high-frequency short-range vibrations, and can further allow the top cone 782 to reciprocate in the distribution hole 731, which can more effectively clear the refrigerant blocked in the distribution hole 731.

[0087] This solution maximizes the condensation efficiency of the gaseous refrigerant through a serpentine five-process design and a microchannel flat tube 72 structure, effectively transferring the heat of the liquid-cooled battery pack 2 to the environment. It can also dynamically increase the number of distribution holes 731 (increasing from the second process 714 to the fifth process 717) and reduce the aperture (decreasing from the second process 714 to the fifth process 717) according to the gas-liquid ratio of each process (gas phase decreasing, liquid phase increasing), ensuring uniform distribution of the gas phase, increasing the liquid phase flow rate to overcome viscosity, inhibiting gravitational sedimentation, and significantly reducing liquid phase aggregation and retention.

[0088] This solution also has the function of dynamic temperature adjustment. Based on the intelligent component of the two-way memory spring 77, it automatically responds to changes in the refrigerant temperature: at high temperatures, the memory spring 77 contracts to increase the flow area, increase the flow rate, and prevent the system from overheating and crashing; at low temperatures, the memory spring 77 expands to reduce the flow area (maintained at 40%-60%), increase the system pressure, completely eliminate the risk of liquid hammer in the compressor 4, and ensure low-temperature reliability; failure safety: if the memory spring 77 fails, the default low-temperature protection state is entered.

[0089] When an abnormal pressure drop in the final process is detected, the air pump 6 starts the high-pressure mode (adding 0.3MPa to the process pressure), and injects high-pressure gas into the blocked distribution hole 731 or microchannel through the internal air channel of the top cone 782 and the expandable three-petal cone head (expanded when the pressure is >0.8MPa) to forcefully clear it; through the contact structure between the pressure guide plate 752 and the guide plate 78 (the protruding strip 753 and the guide groove), high-frequency micro-vibration is generated during the adjustment process to assist the top cone 782 in clearing attachments in the hole; during normal operation, the air pump 6 maintains a small pressure difference (≤0.05MPa) between the adjustment chamber and the collecting pipe 71 to prevent refrigerant from escaping.

[0090] The condenser body 7 solves the problems of gas-liquid two-phase flow distribution, high liquid phase retention, low-temperature liquid hammer, channel blockage, etc. in the microchannel condenser, and significantly improves the heat dissipation efficiency, environmental adaptability and long-term operation stability of the energy storage battery thermal management system.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A microchannel condenser for heat dissipation of an energy storage battery, comprising a condenser body (7) arranged in an energy storage battery cabinet (1), wherein the energy storage battery cabinet (1) is further provided with a liquid-cooled battery pack (2), a plate heat exchanger (3), a compressor (4), a condensate pump (5) and an air pump (6), a fan (8) is provided on the surface of the condenser body (7), and the condenser body (7) is connected to the plate heat exchanger (3), the compressor (4) and the condensate pump (5) in sequence through working medium circulation pipelines to form a circulation loop, characterized in that: The condenser body (7) comprises: Two parallel manifolds (71); A plurality of flat tubes (72) connected between the two manifolds (71), wherein microchannels are provided in the flat tubes (72), and both ends of the flat tubes (72) extend into the interior of the two manifolds (71); At least two baffles (74) are provided in each collecting pipe (71) along the length direction, and the baffles (74) in the two collecting pipes (71) are alternately staggered in the horizontal direction, so as to divide the collecting pipe (71) into a plurality of series-connected flows; A perforated plate (73) is vertically installed in each manifold (71), and the perforated plate (73) is provided with a distribution hole (731) communicating with the microchannel of the flat tube (72); A dynamic adjustment component (75) located at the refrigerant inlet end of the final stage process, for automatically adjusting its flow cross-sectional area in response to the refrigerant temperature; The dynamic adjustment component (75) comprises a sealed adjustment chamber; a guide seat (751) is provided inside the chamber; a pressure guide plate (752) is slidably provided on the guide seat (751); the pressure guide plate (752) has a chamfered working end; a plurality of top cones (782) disposed in the regulating chamber and corresponding to the distribution holes (731); When the pressure guide plate (752) slides along the guide seat (751), its chamfered working end portion can cause the top cone (782) to move into the corresponding distribution hole (731) to partially block the distribution hole (731); A memory spring (77) is provided in the regulating chamber, one end of the memory spring (77) is fixedly connected to the guide seat (751), and the other end is fixedly connected to the pressure guide plate (752); The memory spring (77) is a two-way shape memory alloy spring, the length of which can expand and contract in response to changes in the temperature of the refrigerant in the manifold (71); At least one conductive sheet (78) is provided in the regulating chamber; Each conducting plate (78) is fixedly connected to a plurality of top rods (781) penetrating the wall of the regulating chamber; A portion of each push rod (781) located outside the regulating chamber is provided with a limiting ring (783); A return spring (784) is sleeved on the portion of each push rod (781) located inside the regulating chamber. The return spring (784) acts between the inner wall of the regulating chamber and the guide plate (78) or the push rod (781), providing a return force to separate the top cone (782) from the distribution hole (731).

2. A microchannel condenser for heat dissipation of energy storage batteries according to claim 1, characterized in that: The baffle (74) separates the collecting pipe (71) along its axial direction into a first flow (713), a second flow (714), a third flow (715), a fourth flow (716) and a fifth flow (717) connected in series. The refrigerant flows through the first flow (713) to the fifth flow (717) in sequence. The flow in each collecting pipe (71) is connected end to end with the microchannel of the flat tube (72) through the distribution hole (731) to form a serpentine flow.

3. A microchannel condenser for heat dissipation of energy storage batteries according to claim 2, characterized in that: The orifice plate (73) is arranged in the second process (714) to the fifth process (717), and the number of distribution holes (731) below the orifice plate (73) increases step by step from the second process (714) to the fifth process (717), so as to improve the liquid phase circulation efficiency.

4. A microchannel condenser for heat dissipation of energy storage batteries as claimed in claim 3, characterized in that: The aperture of the distribution hole (731) decreases step by step from the second process (714) to the fifth process (717), thereby increasing the liquid phase flow rate and suppressing gravity sedimentation through the change of cross-sectional area.

5. The microchannel condenser for heat dissipation of energy storage batteries according to claim 2, characterized in that: The collecting pipe (71) further includes: An air inlet pipe (711) located at the inlet end of the first process (713) is used to introduce gaseous refrigerant; The liquid outlet pipe (712) located at the outlet end of the fifth process (717) is used to discharge the subcooled liquid refrigerant.

6. A microchannel condenser for heat dissipation of energy storage batteries according to claim 5, characterized in that: The condenser body (7) is installed at an angle of 5°-8° along the refrigerant flow direction, utilizing gravity to assist the liquid phase flow; The bottom side of the perforated plate (73) facing away from the flat tube (72) is sprayed with a PTFE hydrophobic coating to reduce liquid phase adhesion and retention.

7. The microchannel condenser for heat dissipation of energy storage batteries according to claim 1, characterized in that: The dynamic adjustment component (75) further includes a conducting tube (76) connected to the end of the adjustment chamber, wherein the conducting tube (76) passes through and extends to the outside of the end of the manifold (71) and is used to be connected to the compressed air source of the air pump (6).

8. The microchannel condenser for heat dissipation of energy storage batteries according to claim 1, characterized in that: The top cone (782) is fixedly connected to the end of the top rod (781) located in the adjustment chamber; An air passage is provided inside the top cone (782) and the top rod (781), and the air passage is connected to the inside of the regulating chamber; The end of the top cone (782) is an expandable three-petal structure.

9. The microchannel condenser for heat dissipation of energy storage batteries according to claim 1, characterized in that: The upper surface of the chamfered working end of the pressure guide plate (752) is provided with a plurality of protruding protruding strips (753); A chamfered guide groove matching the protruding strip (753) is provided on one side of the guide plate (78) facing the pressure guide plate (752).

Images