Novel liquid cooling plate

Abstract

The utility model relates to the technical field of batteries, in particular to a novel liquid cooling plate which comprises a plurality of cooling pipes, two end plates are installed on one side of each cooling pipe, a water outlet cover plate and a water inlet cover plate are arranged on the outer sides of the end plates, water inlet and outlet connectors are installed at the ends of the water outlet cover plate and the water inlet cover plate, and the water inlet and outlet connectors are connected with the cooling pipes. The water inlet and outlet connector on the water outlet cover plate is externally connected with a water outlet pipe, and the water inlet and outlet connector on the water inlet cover plate is externally connected with a water inlet pipe. According to the novel liquid cooling plate, a plurality of cooling pipes are arranged and are tightly connected with the water inlet cover plate and the water outlet cover plate, so that an efficient cooling liquid circulating system is formed. According to the design, the cooling area is increased, so that the cooling liquid can be more fully contacted with the battery cell, and the heat generated by the battery cell is more effectively taken away. And the liquid cooling plate and the battery cell module are packaged together, and the high-thermal-conductivity water-based potting is adopted to fill the gap, so that the heat conduction efficiency is further improved, and the thermal resistance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a novel liquid cooling plate. Background Art

[0002] With the rapid development of battery technology, batteries are increasingly used in various electronic devices, electric vehicles, and energy storage systems. However, as the frequency and power of battery use increase, the heat generated is also increasing. If the operating temperature of the battery is too high or the temperature difference is too large, it will have a serious impact on the performance, safety, and life of the battery.

[0003] At present, the common battery cooling technologies on the market mainly include air cooling and liquid cooling. Although the air cooling method has a simple structure, its cooling effect is limited and it is difficult to meet the heat dissipation requirements of high-power battery modules. Although the traditional liquid cooling method has a better heat dissipation effect, it can often only cool a certain part of the battery. For example, only a liquid cooling plate is set at the bottom of the battery cell, resulting in a large temperature difference between the upper and lower parts of the battery cell.

[0004] When different parts of the battery cell are at different temperatures, the battery cell will self-discharge due to the large temperature difference, which not only reduces the overall efficiency of the battery cell, but also increases the overall heat dissipation. In addition, the large temperature difference will accelerate the aging of the battery cell and shorten the service life of the battery. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of liquid cooling plate to solve the problem that the air cooling method proposed in the above background technology is simple in structure but has limited cooling effect and is difficult to meet the heat dissipation requirements of high-power battery modules. Although the traditional liquid cooling method has a good heat dissipation effect, it can often only cool a certain part of the battery, such as only setting a liquid cooling plate at the bottom of the battery cell, resulting in a large temperature difference between the upper and lower parts of the battery cell.

[0006] To achieve the above-mentioned purpose, the utility model provides a new type of liquid cooling plate, including a plurality of cooling tubes, two end plates are installed on one side of the cooling tubes, and a water outlet cover plate and a water inlet cover plate are arranged on the outer side of the end plate. The ends of the water outlet cover plate and the water inlet cover plate are both installed with water inlet and outlet joints, the water inlet and outlet joints on the water outlet cover plate are externally connected to the water outlet pipe, and the water inlet and outlet joints on the water inlet cover plate are externally connected to the water inlet pipe. The liquid cooling plate is arranged on the outer shell of the battery cell and is packaged together with the battery cell module, and the gap is filled with high thermal conductivity aqueous potting.

[0007] Preferably, an insulating film is adhered to the outer surface of the cooling tube by high-temperature baking.

[0008] Preferably, a water outlet joint is installed on the water outlet pipe, and the end of the water inlet pipe is connected to a water inlet joint.

[0009] Preferably, a flow channel is provided inside the cooling tube, a drain port is provided at the end of the cooling tube, the inner side of the drain port is communicated with the flow channel, and a cooling tube plug is installed at the port.

[0010] Preferably, the cooling pipe, water outlet pipe and water inlet pipe are produced by extrusion process, the end plate, cooling pipe plug, water inlet cover plate, water outlet cover plate, inlet and outlet water joints are produced by stamping process, the inlet joint and water outlet joint are machined, and the end plate, cooling pipe plug, water inlet cover plate, water outlet cover plate and inlet and outlet water joints are made of composite layer aluminum plate.

[0011] Preferably, the cooling pipe and other components are fixed by high-temperature welding, and the gaps between the materials are filled with low-melting-point aluminum material at high temperature.

[0012] Preferably, the water outlet cover plate and the water inlet cover plate are both flat plate structures and are provided with flow channels inside. One end of the flow channel of the water outlet cover plate is connected to the cooling pipe, and the other end is connected to the water outlet pipe. One end of the flow channel of the water inlet cover plate is connected to the cooling pipe, and the other end is connected to the water inlet pipe.

[0013] Preferably, the cooling pipe is a flat rectangular structure, the flow channel is a U-shaped structure, one end of the cooling pipe is connected to one end of the water outlet cover plate, and the other end is connected to one end of the water inlet cover plate.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In this new liquid cooling plate, a high-efficiency coolant circulation system is formed by setting up multiple cooling pipes and closely connecting them with the water inlet cover plate and the water outlet cover plate. This design increases the cooling area, allowing the coolant to contact the battery cell more fully, thereby more effectively taking away the heat generated by the battery cell. By packaging the liquid cooling plate and the battery cell module together and using high thermal conductivity water-based potting to fill the gap, the heat conduction efficiency is further improved and the thermal resistance is reduced. This not only helps to reduce the operating temperature of the battery cell, but also significantly reduces the temperature difference between different parts inside the battery cell.

[0016] 2. The manufacturing process used in this new liquid cooling plate has also greatly improved the performance and reliability of the liquid cooling plate. The components are fixed by high-temperature welding, and the gaps between materials are filled with low-melting-point aluminum, which ensures the sealing and structural stability of the liquid cooling plate. This manufacturing process also improves the corrosion resistance of the liquid cooling plate and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the coolant flow of the utility model.

[0019] The meaning of each number in the figure is:

[0020] 1. Cooling pipe; 2. Insulating film; 3. End plate; 4. Water outlet cover plate; 5. Water inlet cover plate; 6. Water inlet and outlet joints; 7. Water inlet pipe; 8. Water outlet pipe; 9. Water inlet joint; 10. Water outlet joint; 11. Cooling pipe plug. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides a new type of liquid cooling plate, such as Figure 1-Figure 2 As shown, it includes a plurality of cooling tubes 1, two end plates 3 are installed on one side of the cooling tube 1, a water outlet cover plate 4 and a water inlet cover plate 5 are arranged on the outer side of the end plate 3, and the ends of the water outlet cover plate 4 and the water inlet cover plate 5 are both installed with water inlet and outlet joints 6, the water inlet and outlet joints 6 on the water outlet cover plate 4 are externally connected to the water outlet pipe 8, and the water inlet and outlet joints 6 on the water inlet cover plate 5 are externally connected to the water inlet pipe 7, the liquid cooling plate is arranged in the outer shell of the battery cell and is packaged together with the battery cell module, and the gap is filled with high thermal conductivity water-based potting.

[0023] In this embodiment, the outer surface of the cooling tube 1 is pasted with an insulating film 2 by high-temperature baking to improve the insulation performance of the liquid cooling plate.

[0024] Specifically, a water outlet joint 10 is installed on the water outlet pipe 8, and a water inlet joint 9 is connected to the end of the water inlet pipe 7, so as to facilitate connection with external water inlet and outlet pipelines.

[0025] Furthermore, a flow channel is provided inside the cooling tube 1, and a drain port is provided at the end of the cooling tube 1. The inner side of the drain port is connected to the flow channel, and a cooling tube plug 11 is installed at the port to facilitate the cooling tube plug 11 to be removed when not in use so that the residual liquid inside can be fully discharged.

[0026] Furthermore, the cooling pipe 1, the water outlet pipe 8 and the water inlet pipe 7 are produced by an extrusion process, the end plate 3, the cooling pipe plug 11, the water inlet cover plate 5, the water outlet cover plate 4, the water inlet and outlet joints 6 are produced by a stamping process, the water inlet joint 9 and the water outlet joint 10 are machined, and the material of the end plate 3, the cooling pipe plug 11, the water inlet cover plate 5, the water outlet cover plate 4 and the water inlet and outlet joints 6 is a composite layer aluminum plate, which improves the overall strength and stability of the equipment.

[0027] Furthermore, the cooling pipe 1 and other components are fixed by high-temperature welding, and the gaps between the materials are filled with low-melting-point aluminum materials at high temperatures to ensure good sealing and corrosion resistance.

[0028] Furthermore, the water outlet cover plate 4 and the water inlet cover plate 5 are both flat plate structures, and flow channels are arranged inside. One end of the flow channel of the water outlet cover plate 4 is connected to the cooling pipe 1, and the other end is connected to the water outlet pipe 8. One end of the flow channel of the water inlet cover plate 5 is connected to the cooling pipe 1, and the other end is connected to the water inlet pipe 7, so as to facilitate the smooth flow of the coolant.

[0029] Furthermore, the cooling tube 1 is a flat rectangular structure, and the flow channel is a U-shaped structure. One end is connected to one end of the water outlet cover plate 4, and the other end is connected to one end of the water inlet cover plate 5, so that the coolant flows up and down along the cooling tube 1, thereby reducing the upper and lower temperatures of the battery cell, reducing the overall temperature difference of the battery cell, and quickly taking away the excess heat of the battery cell, so that the average temperature difference of the entire battery pack is within 5°C, thereby improving the overall energy efficiency of the battery cell and the overall service life of the battery pack.

[0030] When the new liquid cooling plate of the utility model is in use, the coolant first flows from the water inlet joint 9 through the water inlet pipe 7 and into the flow channel of the water inlet cover plate 5. The water inlet cover plate 5 is designed as a flat plate-like structure, and the flow channel arranged inside ensures the uniform distribution of the coolant. The coolant flows from the flow channel of the water inlet cover plate 5 into the cooling tube 1. The cooling tube 1 is designed as a flat rectangular structure, and the internal flow channel is U-shaped. This design increases the contact area between the coolant and the battery cell and improves the cooling efficiency. The coolant flows up and down in the cooling tube 1, evenly absorbing the heat generated by the battery cell. The coolant passing through the cooling tube 1 then flows into the flow channel of the water outlet cover plate 4, and the water outlet cover plate 4 is also designed as a flat plate-like structure to ensure the smooth outflow of the coolant. The coolant flows out from the flow channel of the water outlet cover plate 4, and is discharged through the water outlet pipe 8 and the water outlet joint 10, completing a complete cooling cycle. The entire liquid cooling plate is tightly packaged with the battery cell module, and the gap is filled with high thermal conductivity water-based potting to ensure the effective conduction of heat. The designs of the end plate 3, the water inlet and outlet joints 6, the cooling pipe plug 11 and other structures enhance the stability and sealing of the liquid cooling plate, and improve the cooling efficiency and service life.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel liquid cooling plate, comprising a plurality of cooling tubes (1), characterized in that: Two end plates (3) are installed on one side of the cooling pipe (1), and a water outlet cover plate (4) and a water inlet cover plate (5) are arranged on the outer side of the end plate (3). The ends of the water outlet cover plate (4) and the water inlet cover plate (5) are both installed with water inlet and outlet joints (6), the water inlet and outlet joints (6) on the water outlet cover plate (4) are externally connected to a water outlet pipe (8), and the water inlet and outlet joints (6) on the water inlet cover plate (5) are externally connected to a water inlet pipe (7). The liquid cooling plate is arranged on the outer shell of the battery cell and is packaged together with the battery cell module, and the gap is filled with a high thermal conductivity water-based potting.

2. The novel liquid cooling plate according to claim 1, characterized in that: The outer surface of the cooling tube (1) is pasted with an insulating film (2) by high-temperature baking.

3. The novel liquid cooling plate according to claim 1 is characterized in that: A water outlet joint (10) is installed on the water outlet pipe (8), and the end of the water inlet pipe (7) is connected to a water inlet joint (9).

4. The novel liquid cooling plate according to claim 1, characterized in that: A flow channel is provided inside the cooling pipe (1), a liquid discharge port is provided at the end of the cooling pipe (1), the inner side of the liquid discharge port is communicated with the flow channel, and a cooling pipe plug (11) is installed at the end.

5. The novel liquid cooling plate according to claim 3 is characterized in that: The cooling pipe (1), the water outlet pipe (8) and the water inlet pipe (7) are produced by an extrusion process; the end plate (3), the cooling pipe plug (11), the water inlet cover plate (5), the water outlet cover plate (4) and the water inlet and outlet joints (6) are produced by a stamping process; the water inlet joint (9) and the water outlet joint (10) are machined; and the material of the end plate (3), the cooling pipe plug (11), the water inlet cover plate (5), the water outlet cover plate (4) and the water inlet and outlet joints (6) is a composite layer aluminum plate.

6. The novel liquid cooling plate according to claim 1 is characterized in that: The cooling pipe (1) and other components are fixed by high-temperature welding, and the gaps between the materials are filled with low-melting-point aluminum material at high temperature.

7. The novel liquid cooling plate according to claim 1 is characterized in that: The water outlet cover plate (4) and the water inlet cover plate (5) are both flat plate-shaped structures and are both provided with flow channels inside. One end of the flow channel of the water outlet cover plate (4) is connected to the cooling pipe (1) and the other end is connected to the water outlet pipe (8). One end of the flow channel of the water inlet cover plate (5) is connected to the cooling pipe (1) and the other end is connected to the water inlet pipe (7).

8. The novel liquid cooling plate according to claim 7, characterized in that: The cooling pipe (1) is a flat rectangular parallelepiped structure, the flow channel is a U-shaped structure, one end of which is connected to one end of the water outlet cover plate (4), and the other end of which is connected to one end of the water inlet cover plate (5).

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