Battery liquid cooling plate

Abstract

The utility model relates to battery heat dissipation technical field, concretely relates to a battery liquid cooling plate, including liquid cooling plate main part, the even arrangement's flat pipe is installed to a plurality of on liquid cooling plate main part upper surface, the first phase change cavity is arranged in the flat pipe, the hollow cavity is opened in the liquid cooling plate main part inside, the liquid inlet and liquid outlet are opened to the liquid cooling plate main part upper surface, the liquid inlet pipe and liquid outlet pipe are fixedly connected to the liquid cooling plate main part upper surface, the hollow cavity inside top wall is fixedly connected with a plurality of first fin and second fin, the opposite sides of first fin all are opened with a plurality of linear equidistance arrangement's double trapezoidal flow channel, through being opened with a plurality of linear equidistance arrangement's double trapezoidal flow channel on the opposite sides of first fin surface, and opening first arc channel at lower end face, and being opened with second arc channel on the opposite sides of second fin surface, can increase the contact area with flowing liquid, effectively improve the use effect of fin.

Description

Technical Field

[0001] This utility model relates to the field of battery heat dissipation technology, and more specifically, to a battery liquid cooling plate. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and portable electronic devices, automotive batteries, as core energy storage components, directly determine the competitiveness of end products through their performance and safety. Current battery cooling methods mainly include: air cooling, cold plate liquid cooling, and single-phase immersion cooling. As the energy density of individual battery cells continues to increase, traditional air cooling is becoming increasingly insufficient to meet the growing heat dissipation demands of battery energy storage. Therefore, energy storage battery cooling methods are shifting towards liquid cooling. However, existing technologies have the following shortcomings in use:

[0003] When liquid cooling a battery, fins are usually used to assist in heat dissipation. However, traditional fins are generally rectangular, and their contact area with the flowing liquid is limited, which cannot improve the heat dissipation efficiency of the fins during use.

[0004] Therefore, there is an urgent need for a battery liquid cooling plate to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a battery liquid cooling plate, which can solve the problem that when liquid cooling of batteries, fins are generally used for auxiliary heat dissipation. However, traditional fins are generally rectangular, and their contact area with the flowing liquid is limited, thus failing to improve the heat dissipation efficiency of the fins during use.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The application is as follows:

[0008] A battery liquid cooling plate includes a liquid cooling plate body, a plurality of flat tubes evenly arranged are installed on the upper surface of the liquid cooling plate body, a first phase change cavity is provided inside the flat tubes, a hollow cavity is opened inside the liquid cooling plate body, an inlet and an outlet are opened on the upper surface of the liquid cooling plate body, an inlet pipe and an outlet pipe are fixedly connected to the upper surface of the liquid cooling plate body, and a plurality of first fins and second fins are fixedly connected to the top wall of the hollow cavity.

[0009] The first fin has several double trapezoidal flow channels arranged linearly and equidistantly on both sides. The double trapezoidal flow channels are composed of two trapezoidal grooves that are symmetrically distributed. The lower end face of the first fin has a first arc-shaped channel.

[0010] The second fin has a second arc-shaped channel on each of its two opposite surfaces.

[0011] As a preferred technical solution of this application, the liquid inlet and liquid outlet are symmetrically distributed about the central axis of the liquid cooling plate body, and both the liquid inlet and liquid outlet are connected to the hollow cavity.

[0012] As a preferred technical solution of this application, the inlet pipe is located outside the inlet and is connected to the inlet, and the outlet pipe is located outside the outlet and is connected to the outlet.

[0013] As a preferred technical solution of this application, the flat tube is rectangular and is arranged longitudinally.

[0014] As a preferred technical solution of this application, the double trapezoidal flow channel is designed with a medium-narrow side width, and the size of the first fin is larger than the size of the second fin.

[0015] As a preferred technical solution of this application, a plurality of first fins and a plurality of second fins are arranged in an alternating manner, and the first fins do not contact the second fins.

[0016] As a preferred technical solution of this application, the lengths of the double trapezoidal flow channel and the first arc-shaped channel are the same as the length of the first fin, and the length of the second arc-shaped channel is the same as the length of the second fin.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. By opening several double trapezoidal flow channels arranged linearly and equidistantly on both sides of the first fin, and opening a first arc-shaped channel on the lower end face, the contact area with the flowing liquid can be increased when the liquid circulates inside the hollow cavity. At the same time, since a second arc-shaped channel is opened on both sides of the second fin, the contact area with the flowing liquid can also be increased, thereby effectively improving the actual use effect of the first fin and the second fin.

[0019] 2. When the liquid circulates inside the hollow cavity, it absorbs heat from multiple flat tubes, thus ensuring the heat dissipation effect on the battery in conjunction with the multiple flat tubes. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of a flat tube in a battery liquid cooling plate provided in this application.

[0021] Figure 2 This is a cross-sectional structural diagram of the main body of a battery liquid cooling plate provided in this application.

[0022] Figure 3 This is a schematic diagram of the overall structure of a battery liquid cooling plate body after assembly with the battery, as provided in this application.

[0023] Figure 4 for Figure 1 A magnified structural diagram of part A in the middle.

[0024] Figure 5 for Figure 2 A magnified structural diagram of part B.

[0025] Figure 6 This is a schematic diagram of the liquid cooling cycle of the main body of the liquid cooling plate.

[0026] The image shows:

[0027] 1. Liquid cooling plate body; 2. Flat tube; 3. First phase change cavity; 4. Hollow cavity; 5. Liquid inlet; 6. Liquid outlet; 7. Liquid inlet pipe; 8. Liquid outlet pipe; 9. First fin; 10. Second fin; 11. Double trapezoidal flow channel; 12. Trapezoidal groove; 13. First arc-shaped channel; 14. Second arc-shaped channel. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used to distinguish the description and should not be construed as indicating or implying relative importance. Example

[0030] like Figure 1-6 As shown, the battery liquid cooling plate proposed in this embodiment includes a liquid cooling plate body 1. Several flat tubes 2 are evenly arranged on the upper surface of the liquid cooling plate body 1. The flat tubes 2 are rectangular and arranged longitudinally. A first phase change cavity 3 is provided inside the flat tubes 2. A hollow cavity 4 is opened inside the liquid cooling plate body 1. An inlet 5 and an outlet 6 are opened on the upper surface of the liquid cooling plate body 1. An inlet pipe 7 and an outlet pipe 8 are fixedly connected to the upper surface of the liquid cooling plate body 1. Several first fins 9 and second fins 10 are fixedly connected to the inner top wall of the hollow cavity 4.

[0031] The flat tube 2 has a capillary structure. After the flat tube 2 is evacuated, the working medium is filled into the first phase change cavity 3. The side of the flat tube 2 that is in contact with the side of the battery is the evaporation end of the flat tube 2. The bottom end of the flat tube 2 that is connected to the liquid cooling plate body 1 is the condensation end. Some of the heat generated by the battery can be transferred to the surface of the flat tube 2, causing the working medium in the first phase change cavity 3 to undergo a phase change from liquid to gas, thus carrying away the heat. Since the saturation temperature of the working medium at the evaporation end is higher, the saturation pressure at that point is also higher. The saturation temperature of the working medium at the condensation end is lower, resulting in a lower saturation pressure at the condensation end. Under the action of the pressure difference, the gaseous working medium generated at the evaporation end will flow to the condensation end for condensation, thereby transferring the heat on the side of the battery to the liquid cooling plate body 1 at the bottom via the phase change flat tube 2. The flat tube 2 transfers heat through the phase change of the working medium (evaporation-condensation), which is a composite process of two-phase heat transfer and mass flow. After the phase change flat tube 2 is evacuated, the working medium is filled in, which reduces the resistance of gas molecules to the vapor flow and lowers the boiling point of the working medium.

[0032] In the traditional liquid cooling plate body 1 heat dissipation method, the heat generated by battery charging and discharging relies entirely on the battery's own thermal conduction to transfer from top to bottom. Now, by setting multiple flat tubes 2, the heat conduction speed of the battery can be accelerated, thereby effectively enhancing the heat dissipation effect of the battery.

[0033] The first fin 9 has several linearly equidistant double trapezoidal flow channels 11 on both sides. The double trapezoidal flow channels 11 are formed by two symmetrically distributed trapezoidal grooves 12. The lower end face of the first fin 9 has a first arc-shaped channel 13. The second fin 10 has second arc-shaped channels 14 on both sides. The double trapezoidal flow channels 11 are designed to be narrow in the middle and wide on the sides. The size of the first fin 9 is larger than the size of the second fin 10. Several first fins 9 and several second fins 10 are arranged in an alternating manner, and the first fins 9 do not contact the second fins 10. The lengths of the double trapezoidal flow channels 11 and the first arc-shaped channel 13 are the same as the length of the first fin 9. The length of the second arc-shaped channel 14 is the same as the length of the second fin 10.

[0034] The heat generated by the battery during operation is transferred to the liquid cooling plate body 1, which then transfers the heat to multiple first fins 9 and multiple second fins 10. The multiple first fins 9 and multiple second fins 10 come into contact with the liquid inside the hollow cavity 4. By opening several linearly equidistant double trapezoidal flow channels 11 on both sides of the first fin 9 and opening a first arc-shaped channel 13 on the lower end face, the contact area with the flowing liquid can be increased. At the same time, since the second arc-shaped channels 14 are opened on both sides of the second fin 10, the contact area with the flowing liquid can also be increased. Compared with the traditional planar rectangular fins, the first fins 9 and the second fins 10 have higher heat dissipation efficiency in actual use.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the liquid inlet 5 and the liquid outlet 6 are symmetrically distributed about the central axis of the liquid cooling plate body 1. Both the liquid inlet 5 and the liquid outlet 6 are connected to the hollow cavity 4. The liquid inlet pipe 7 is located outside the liquid inlet 5 and is connected to the liquid inlet 5. The liquid outlet pipe 8 is located outside the liquid outlet 6 and is connected to the liquid outlet 6.

[0036] Multiple batteries are evenly arranged and installed on the upper surface of the liquid cooling plate body 1, so that the opposite two sides of each battery are in contact with two of the flat tubes 2. The corresponding liquid supply pipes and return pipes are connected to the liquid inlet pipe 7 and the liquid outlet pipe 8, respectively. In conjunction with the chiller unit, the liquid is injected into the hollow cavity 4 through the liquid supply pipe, the liquid inlet pipe 7 and the liquid inlet 5, and flows back into the chiller unit through the liquid outlet 6, the liquid outlet pipe 8 and the return pipe, thereby realizing the circulation of liquid inside the hollow cavity 4.

[0037] The working principle of the above embodiments is as follows: Figure 3 and Figure 6 As shown, multiple batteries are first evenly arranged and installed on the upper surface of the liquid-cooled plate body 1, so that the opposite two sides of each battery are in contact with two flat tubes 2. The corresponding liquid supply pipes and return pipes are connected to the liquid inlet pipe 7 and the liquid outlet pipe 8, respectively. In conjunction with a chiller unit, liquid is injected into the hollow cavity 4 through the liquid supply pipe, the liquid inlet pipe 7 and the liquid inlet 5, and flows back into the chiller unit through the liquid outlet 6, the liquid outlet pipe 8 and the return pipe, thereby realizing the circulation of liquid inside the hollow cavity 4. During this process, the heat generated by the battery during operation is transferred to the liquid-cooled plate body 1, and the liquid-cooled plate body 1 transfers the heat to multiple first fins 9 and multiple second fins 10. The multiple first fins 9 and the second fins 10 are in contact with the interior of the hollow cavity 4. Liquid contact is achieved by opening several linearly equidistant double trapezoidal flow channels 11 on both sides of the first fin 9 and opening a first arc-shaped channel 13 on the lower end face, which increases the contact area with the flowing liquid. At the same time, since a second arc-shaped channel 14 is opened on both sides of the second fin 10, the contact area with the flowing liquid is also increased. Compared with the traditional planar rectangular fins, the first fin 9 and the second fin 10 have higher heat dissipation efficiency in actual use. The heat generated during battery operation is also conducted to the flat tube 2. When the liquid inside the hollow cavity 4 circulates, it can absorb the heat from multiple flat tubes 2, thus ensuring the heat dissipation effect of the battery in conjunction with multiple first fins 9 and second fins 10.

[0038] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A battery liquid cooling plate, characterized in that: The system includes a liquid cooling plate body (1), on the upper surface of which are a plurality of flat tubes (2) arranged in a uniform manner. A first phase change cavity (3) is provided inside the flat tubes (2). A hollow cavity (4) is opened inside the liquid cooling plate body (1). An inlet (5) and an outlet (6) are opened on the upper surface of the liquid cooling plate body (1). An inlet pipe (7) and an outlet pipe (8) are fixedly connected to the upper surface of the liquid cooling plate body (1). A plurality of first fins (9) and second fins (10) are fixedly connected to the top wall of the hollow cavity (4). The first fin (9) has several double trapezoidal flow channels (11) arranged linearly and equidistantly on both sides. The double trapezoidal flow channels (11) are composed of two trapezoidal grooves (12) that are symmetrically distributed. The lower end face of the first fin (9) has a first arc-shaped channel (13). The second fin (10) has a second arc-shaped channel (14) on both sides.

2. The battery liquid cooling plate according to claim 1, characterized in that, The liquid inlet (5) and liquid outlet (6) are symmetrically distributed about the central axis of the liquid cooling plate body (1), and both the liquid inlet (5) and liquid outlet (6) are connected to the hollow cavity (4).

3. The battery liquid cooling plate according to claim 1, characterized in that, The inlet pipe (7) is located outside the inlet (5) and is connected to the inlet (5). The outlet pipe (8) is located outside the outlet (6) and is connected to the outlet (6).

4. A battery liquid cooling plate according to claim 1, characterized in that, The flat tube (2) is rectangular and is arranged longitudinally.

5. A battery liquid cooling plate according to claim 1, characterized in that, The double trapezoidal flow channel (11) is designed with a medium-narrow side width, and the size of the first fin (9) is larger than the size of the second fin (10).

6. A battery liquid cooling plate according to claim 1, characterized in that, A number of first fins (9) and a number of second fins (10) are arranged in an alternating manner, and the first fins (9) do not contact the second fins (10).

7. A battery liquid cooling plate according to claim 1, characterized in that, The lengths of the double trapezoidal flow channel (11) and the first arc-shaped channel (13) are the same as the length of the first fin (9), and the length of the second arc-shaped channel (14) is the same as the length of the second fin (10).

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