Side cooling type liquid cooling plate with efficient cooling function

Abstract

The utility model relates to the technical field of energy storage battery cooling plates, and provides an efficient cooling side cooling type liquid cooling plate which is characterized in that an upper U-shaped flat pipe and a lower U-shaped flat pipe which are vertically spaced are arranged for cooling, cold water enters an upper harmonica part I from a water inlet nozzle, and then the cold water flows through the front part of the upper harmonica part I to a front current collector; cold water enters the front end of the first lower harmonica part from the front current collector, then flows to the rear end of the first lower harmonica part from the first lower harmonica part, flows into the rear current collector, flows into the rear end in the second upper harmonica part from the rear current collector, flows to the front end of the second upper harmonica part from the second upper harmonica part and flows into the front current collector. Water flows into the rear end of the second lower harmonica part through the front current collector, flows to the water outlet nozzle from the second lower harmonica part to be discharged, and passes through the four harmonica parts of the two harmonica tubes, and cold water is used for cooling to the maximum extent. In the circulation process, the current collector ensures uniform flow distribution among the flat pipes, and the heat dissipation efficiency and uniformity of the liquid cooling plate are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery cooling plates, in particular to a side-cooling liquid cooling plate with high efficiency in cooling. Background Art

[0002] With the rapid development of new energy electric vehicles, battery safety performance is receiving increasing attention. Currently, battery thermal management systems primarily rely on water cooling, which offers higher heat transfer efficiency and more uniform temperature control. Existing water cooling methods primarily utilize liquid cold plates for heat dissipation. For modules with high heat output, bottom-cooled cold plates offer insufficient heat dissipation, making it difficult to maintain high-load operation. Typical side cooling tubes without internal reinforcements have weak compressive strength and are unable to bend. During stamping and welding, metal shavings and solder residue may be generated. During brazing, solder and flux residue may adhere to internal surfaces, requiring specialized cleaning agents and processes to clean. Furthermore, bottom-cooled cold plates are insufficient for high-heat output battery cells, requiring increased heat dissipation through larger surface areas. The cooling-type harmonica tube can meet the requirements of pressure resistance and bendability. For example, CN218215453U discloses a U-shaped harmonica tube liquid cooling plate heat dissipation device. By adding a U-shaped harmonica tube to the side end face of the battery cell and wrapping the U-shaped harmonica tube around the three side end faces of the battery cell, the heat dissipation method of the battery module is changed from the original bottom heat dissipation to the bottom and side heat dissipation at the same time, which can greatly improve the heat dissipation efficiency. However, this patent only has one U-shaped harmonica tube, and the utilization of water is insufficient. The cooling effect needs to be improved. Therefore, it is very important to design a side-cooling liquid cooling plate with high efficiency. Utility Model Content

[0003] In view of this, the purpose of the present invention is to propose a side-cooling liquid cooling plate with high efficiency in cooling, so as to solve the technical problems that the current side-cooling U-shaped harmonica tube has only one U-shaped harmonica tube, the utilization of water is insufficient, and the cooling effect needs to be improved.

[0004] The U-shaped flat tube is a U-shaped flat tube, and the U-shaped flat tube is a U-shaped flat tube. The U-shaped flat tube and the U-shaped flat tube are arranged at intervals. The rear ends of the U-shaped flat tube and the U-shaped flat tube are connected together through a rear collector, and the front ends of the U-shaped flat tube and the U-shaped flat tube are connected together through a front collector; the U-shaped flat tube and the U-shaped flat tube are harmonica tubes, and the U-shaped flat tube includes an upper harmonica part and a lower harmonica part, both of which are U-shaped. The rear ends of the upper harmonica part and the lower harmonica part are connected together through a rear collector, and the rear collector is provided with a blocking piece at the junction of the upper harmonica part and the lower harmonica part. The front ends of the harmonica part one and the lower harmonica part one are connected together through the front collecting fluid; the lower U-shaped flat tube includes an upper harmonica part two and a lower harmonica part two, both of which are U-shaped, and the rear ends of the upper harmonica part two and the lower harmonica part two are connected together through the rear collecting fluid, and the rear collecting fluid is located at the junction of the upper harmonica part two and the lower harmonica part two and is provided with a blocking piece two, and the front ends of the upper harmonica part two and the lower harmonica part two are connected together through the front collecting fluid; the rear ends of the lower harmonica part one and the upper harmonica part two are connected together through the rear collecting fluid; the front collecting fluid is located at the bottom of the lower harmonica part one and the top of the upper harmonica part two and is respectively provided with a blocking piece three and a blocking piece four; the top of the rear end of the upper harmonica part one is a water inlet, and the bottom of the rear end of the lower harmonica part two is a water outlet.

[0005] Preferably, the rear current collector is provided with a water inlet at the water inlet, and the rear current collector is provided with a water outlet at the water outlet.

[0006] Preferably, the rear current collector and the front current collector are located at the upper harmonica part one and the lower harmonica part one and are provided with a water barrier one, and the water barrier one has through holes matching the upper harmonica part one and the lower harmonica part one to block the parts other than the flow channel of the upper harmonica part one and the lower harmonica part one.

[0007] Preferably, the rear current collector and the front current collector are located at the upper harmonica part two and the lower harmonica part two and are provided with a water barrier two, and the water barrier two has through holes matching the upper harmonica part two and the lower harmonica part two to block the parts other than the flow channels of the upper harmonica part two and the lower harmonica part two.

[0008] Preferably, the upper harmonica part 1 and the lower harmonica part 1 each have four flow channels; the upper harmonica part 2 and the lower harmonica part 2 each have five flow channels.

[0009] Preferably, the top and bottom of the rear current collector and the front current collector are both provided with end plugging covers.

[0010] Preferably, evenly arranged battery cells are provided in the U-shape of the upper U-shaped flat tube and the lower U-shaped flat tube, thermal conductive glue is provided on the side of the battery cells close to the upper U-shaped flat tube and the lower U-shaped flat tube, and thermal insulation pads are provided between adjacent battery cells.

[0011] The beneficial effects of this utility model are as follows: This utility model achieves cooling by providing upper and lower U-shaped flat tubes spaced apart from each other. Cold water enters the interior of the upper harmonica section 1 through the water inlet nozzle. The cold water then flows through the front portion of the upper harmonica section 1 to the front collector. From the front collector, the cold water enters the front end of the lower harmonica section 1. The cold water then flows through the lower harmonica section 1 to the rear end of the lower harmonica section 1. The water then flows into the rear collector. From the rear collector, the water flows into the rear end of the upper harmonica section 2. The water flows through the upper harmonica section 2 to the front end of the upper harmonica section 2 and into the front collector. The water then flows through the front collector to the rear end of the lower harmonica section 2. The water then flows through the lower harmonica section 2 to the water outlet nozzle. In this way, water flows through the four harmonica sections of the two harmonica tubes, maximizing the use of cold water for cooling. A bent cold plate is used to reduce the number of connecting pipes. A water baffle is used within the single flat tube, creating a dual-circuit flow path. This provides excellent cooling effect and temperature uniformity. During the entire cycle, the current collector ensures uniform flow distribution among the flat tubes, greatly improving the heat dissipation efficiency and uniformity of the liquid cold plate, effectively preventing local overheating, and providing a more stable and efficient cooling solution for the equipment.

[0012] By using a water-blocking plate, the flow path within the single flat tube is divided into two independent yet interconnected loops, creating a dual-circuit flow path layout. This design not only allows the cooling medium to flow separately within the loops, improving heat exchange efficiency, but also helps balance the flow rate and pressure of the fluid as it flows through the battery cells or other cooling objects, ensuring the stability and uniformity of the entire cooling system. In this way, the single flat tube can more effectively absorb and transfer heat, improving the thermal management performance of the entire system. At the same time, the loop layout significantly improves the temperature uniformity of the cold plate.

[0013] The two flat tubes, one above the other, increase the contact area between the coolant and the tube wall, improving heat exchange efficiency. They also hold more coolant, increasing coolant flow and further enhancing heat dissipation. Compared to stamped and brazed liquid cold plates, the flat tubes produce minimal contaminants during the welding process, ensuring internal flow channel cleanliness and adaptability to high-conductivity module systems. Finally, the parallel connection reduces flow resistance and pressure loss, allowing the coolant to circulate more smoothly within the liquid cooling system, ensuring stable and reliable heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1It is an overall schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of removing the rear current collector and the front current collector;

[0017] Figure 3 It is an explosion diagram of the utility model;

[0018] Figure 4 This is an exploded schematic diagram of the rear current collector of the present invention;

[0019] Figure 5 This is an exploded schematic diagram of the front current collector of the present invention;

[0020] Figure 6 It is a schematic diagram of the utility model applied to a battery cell;

[0021] Figure 7 It is a cross-sectional view of the rear part of the utility model near the rear current collector.

[0022] The following are marked in the figure:

[0023] 1-Upper U-shaped flat tube, 2-Lower U-shaped flat tube, 3-Rear current collector, 4-Front current collector, 5-Upper harmonica part one, 6-Lower harmonica part one, 7-Sealing piece one, 8-Thermal insulation pad, 9-Upper harmonica part two, 10-Lower harmonica part two, 11-Sealing piece two, 12-Sealing piece three, 13-Sealing piece four, 14-Water inlet nozzle, 15-Water outlet nozzle, 16-Water barrier one, 17-Water barrier two, 18-End plugging cover, 19-Battery core, 20-Thermal conductive adhesive. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0026] like Figures 1 to 7 As shown, this embodiment provides a side-cooled liquid cold plate with high efficiency, including an upper U-shaped flat tube 1 and a lower U-shaped flat tube 2. The upper U-shaped flat tube 1 and the lower U-shaped flat tube 2 are spaced apart from each other, and the rear ends of the upper U-shaped flat tube 1 and the lower U-shaped flat tube 2 are connected together through a rear collector 3, and the front ends of the upper U-shaped flat tube 1 and the lower U-shaped flat tube 2 are connected together through a front collector 4; the upper U-shaped flat tube 1 and the lower U-shaped flat tube 2 are both harmonica tubes, and the upper U-shaped flat tube 1 includes an upper harmonica part 5 and a lower harmonica part 6, both of which are U-shaped. The rear ends of the upper harmonica part 5 and the lower harmonica part 6 are connected together through the rear collector 3, and the rear collector 3 is provided with a blocking piece 7 at the intersection of the upper harmonica part 5 and the lower harmonica part 6. 6 are connected together at the front end through the front current collector 4; the lower U-shaped flat tube 2 includes an upper harmonica portion 2 9 and a lower harmonica portion 2 10, both of which are U-shaped. The rear ends of the upper harmonica portion 2 9 and the lower harmonica portion 2 10 are connected together through the rear current collector 3, and the rear current collector 3 is provided with a blocking piece 2 11 at the intersection of the upper harmonica portion 2 9 and the lower harmonica portion 2 10. The front ends of the upper harmonica portion 2 9 and the lower harmonica portion 2 10 are connected together through the front current collector 4; the rear ends of the lower harmonica portion 1 6 and the upper harmonica portion 2 9 are connected together through the rear current collector 3; the front current collector 4 is provided with a blocking piece 3 12 and a blocking piece 4 13 at the bottom of the lower harmonica portion 1 6 and the top of the upper harmonica portion 2 9, respectively; the top end of the upper harmonica portion 1 5 is a water inlet, and the bottom end of the lower harmonica portion 2 10 is a water outlet. The rear current collector 3 is provided with a water inlet nozzle 14 at the water inlet, and a water outlet nozzle 15 at the water outlet. Cooling is achieved by installing upper and lower U-shaped flat tubes 1 and 2 spaced apart. Cold water enters the interior of the upper harmonica section 1 through the water inlet nozzle. The cold water then flows through the front of the upper harmonica section 1 to the front fluid collector 4. From the front fluid collector, the cold water enters the front of the lower harmonica section 1 6. The cold water then flows through the lower harmonica section 1 to the rear end of the lower harmonica section 1. The water then flows into the rear fluid collector 3. From the rear fluid collector 3, the water flows into the rear end of the upper harmonica section 2 9. From the upper harmonica section 2 9, the water flows to the front end of the upper harmonica section 2 9 and into the front fluid collector 4. The water then flows through the front fluid collector 5 and into the rear end of the lower harmonica section 2 10. From the lower harmonica section 2 10, the water flows out of the water outlet nozzle. In this way, water flows through the four harmonica sections of the two harmonica tubes, maximizing the use of cold water for cooling. A bent cold plate is used to reduce the number of connecting pipes. A water baffle is used inside the single flat tube, creating a dual-circuit flow path. It has excellent cooling effect and temperature uniformity. During the entire circulation process, the current collector ensures uniform flow distribution between the flat tubes, greatly improving the heat dissipation efficiency and uniformity of the liquid cold plate, effectively preventing local overheating, and providing a more stable and efficient cooling solution for the equipment.

[0027] The rear current collector 3 and the front current collector 4 are provided with a water barrier 16 at the upper harmonica portion 5 and the lower harmonica portion 6. The water barrier 16 has through holes that match the upper harmonica portion 5 and the lower harmonica portion 6, thereby blocking the flow path outside the upper harmonica portion 5 and the lower harmonica portion 6. The rear current collector 3 and the front current collector 4 are provided with a water barrier 17 at the upper harmonica portion 29 and the lower harmonica portion 210. The water barrier 17 has through holes that match the upper harmonica portion 29 and the lower harmonica portion 210, thereby blocking the flow path outside the upper harmonica portion 29 and the lower harmonica portion 210. By using a water barrier, the flow path within the single flat tube is divided into two independent but interconnected loops, thus forming a dual-loop flow path layout. This design not only allows the cooling medium to flow separately in the loops, improving the efficiency of heat exchange, but also helps to balance the flow rate and pressure of the fluid when flowing through the battery cell or other cooling object, ensuring the stability and uniformity of the entire cooling system. In this way, the single flat tube can absorb and transfer heat more effectively, improving the thermal management performance of the entire system. At the same time, the loop layout greatly improves the temperature uniformity of the cold plate.

[0028] The upper harmonica portion 5 and the lower harmonica portion 6 are each provided with four flow channels; the upper harmonica portion 9 and the lower harmonica portion 10 are each provided with five flow channels. In the cold plate system, the overall temperature of the coolant in the upper U-shaped flat tube 1 is usually lower than that in the lower U-shaped flat tube 2. In order to balance the temperature difference between the upper and lower areas of the battery cell, this design achieves this goal by increasing the heat exchange area of ​​the lower U-shaped flat tube 2. In the side cold plate system, the upper U-shaped flat tube 1 adopts a 4-in, 4-out, two-blocking layout, while the lower U-shaped flat tube 2 adopts a 5-in, 5-out, one-blocking layout. This layout design not only exhibits excellent thermal conductivity, can quickly and effectively transfer heat from the heat source to the cooling medium, accelerate heat dissipation, but also ensures the uniformity of heat flow distribution, thereby optimizing the temperature consistency of the heat exchange area of ​​the side cold plate.

[0029] The top and bottom of the rear current collector 3 and the front current collector 4 are both provided with end plugging covers 18 so that the two current collectors can be disassembled for inspection of the internal conditions.

[0030] In actual application, evenly spaced battery cells 19 are disposed within the U-shaped portions of the upper and lower U-shaped flat tubes 1 and 2. Thermally conductive adhesive 20 is applied to the battery cells 19 adjacent to the upper and lower U-shaped flat tubes 1 and 2, and thermally insulating pads 8 are placed between adjacent battery cells 19. This increases the contact area between the coolant and the tube walls, improving heat exchange efficiency, while also accommodating more coolant and increasing the coolant flow rate, further enhancing heat dissipation capabilities.

[0031] The harmonica side-cooled liquid cold plate of this embodiment not only improves the heat exchange efficiency, but also effectively controls the temperature difference on the surface of the cold plate, ensuring the thermal management performance of the entire system, and is suitable for applications with high thermal management requirements. During the circulation process, the current collector ensures the uniformity of the flow between the flat tubes, further improving the heat dissipation efficiency and uniformity of the liquid cold plate. This design effectively prevents local overheating, provides a more stable and efficient cooling solution for the equipment, and significantly improves the overall performance and reliability of the system. Compared with the stamped brazed liquid cold plate, the flat tubes generate very few pollutants during the welding process, ensuring the cleanliness of the flow channel, and can be applied to module systems with high conductivity.

[0032] The two flat tubes, one above the other, increase the contact area between the coolant and the tube wall, improving heat exchange efficiency. They also hold more coolant, increasing coolant flow and further enhancing heat dissipation. Compared to stamped and brazed liquid cold plates, the flat tubes produce minimal contaminants during the welding process, ensuring internal flow channel cleanliness and adaptability to high-conductivity module systems. Finally, the parallel connection reduces flow resistance and pressure loss, allowing the coolant to circulate more smoothly within the liquid cooling system, ensuring stable and reliable heat dissipation.

[0033] Those skilled in the art will understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the present invention to these examples. Within the spirit and principles of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and many other variations exist in the various aspects of the present invention described above, which are not provided in detail for the sake of clarity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A side-cooling liquid cold plate with high efficiency, characterized in that: The invention comprises an upper U-shaped flat tube (1) and a lower U-shaped flat tube (2), wherein the upper U-shaped flat tube (1) and the lower U-shaped flat tube (2) are arranged at intervals in the upper and lower parts, and the rear ends of the upper U-shaped flat tube (1) and the lower U-shaped flat tube (2) are connected together through a rear collector (3), and the front ends of the upper U-shaped flat tube (1) and the lower U-shaped flat tube (2) are connected together through a front collector (4); the upper U-shaped flat tube (1) and the lower U-shaped flat tube (2) are both harmonica-shaped. The upper U-shaped flat tube (1) includes an upper harmonica part (5) and a lower harmonica part (6) both of which are U-shaped. The rear ends of the upper harmonica part (5) and the lower harmonica part (6) are connected together through a rear collector (3), and the rear collector (3) is provided with a blocking piece (7) at the junction of the upper harmonica part (5) and the lower harmonica part (6). The front ends of the upper harmonica part (5) and the lower harmonica part (6) are connected through a front collector (4). The lower U-shaped flat tube (2) includes an upper harmonica part 2 (9) and a lower harmonica part 2 (10) both of which are U-shaped. The rear ends of the upper harmonica part 2 (9) and the lower harmonica part 2 (10) are connected together through a rear collector (3), and the rear collector (3) is provided with a blocking piece 2 (11) at the junction of the upper harmonica part 2 (9) and the lower harmonica part 2 (10). The front ends of the upper harmonica part 2 (9) and the lower harmonica part 2 (10) are connected together through a front collector (4); the rear ends of the lower harmonica part 1 (6) and the upper harmonica part 2 (9) are connected together through the rear collector (3); the front collector (4) is provided with a blocking piece 3 (12) and a blocking piece 4 (13) at the bottom of the lower harmonica part 1 (6) and the top of the upper harmonica part 2 (9) respectively; the top of the rear end of the upper harmonica part 1 (5) is a water inlet, and the bottom of the rear end of the lower harmonica part 2 (10) is a water outlet.

2. The side-cooling liquid cold plate with high efficiency in cooling according to claim 1, characterized in that: The rear current collector (3) is provided with a water inlet nozzle (14) at the water inlet, and the rear current collector (3) is provided with a water outlet nozzle (15) at the water outlet.

3. The side-cooling liquid cold plate with high efficiency in cooling according to claim 1, characterized in that: The rear current collector (3) and the front current collector (4) are provided with a water barrier (16) at the upper harmonica part (5) and the lower harmonica part (6), and the water barrier (16) has through holes matching the upper harmonica part (5) and the lower harmonica part (6) so as to block the part other than the flow channel of the upper harmonica part (5) and the lower harmonica part (6).

4. The side-cooling liquid cold plate with high efficiency in cooling according to claim 3, characterized in that: The rear collector (3) and the front collector (4) are provided with a water barrier (17) at the upper harmonica part (9) and the lower harmonica part (10), and the water barrier (17) has through holes matching the upper harmonica part (9) and the lower harmonica part (10) so as to block the part other than the flow channel of the upper harmonica part (9) and the lower harmonica part (10).

5. The side-cooling liquid cold plate with high efficiency in cooling according to claim 1, characterized in that: The upper harmonica part 1 (5) and the lower harmonica part 1 (6) are both provided with four flow channels; the upper harmonica part 2 (9) and the lower harmonica part 2 (10) are both provided with five flow channels.

6. The side-cooling liquid cold plate with high efficiency in cooling according to claim 1, characterized in that: The top and bottom of the rear current collector (3) and the front current collector (4) are both provided with end plugging covers (18).

7. The side-cooling liquid cold plate with high efficiency in cooling according to claim 1, characterized in that: Evenly arranged battery cells (19) are provided in the U-shape of the upper U-shaped flat tube (1) and the lower U-shaped flat tube (2); a heat-conducting adhesive (20) is provided on one side of the battery cells (19) close to the upper U-shaped flat tube (1) and the lower U-shaped flat tube (2); and a heat-resisting pad (8) is provided between adjacent battery cells (19).

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