Plate body combination mechanism of battery pack liquid cooling plate

Abstract

The utility model provides a plate body combination mechanism of a battery pack liquid cooling plate, which solves the problems of pipe body attachment and the like in the battery pack liquid cooling plate, and comprises a lower plate body and an upper plate body which are arranged in an up-and-down overlapping manner, the lower plate body is made of metal materials, and the upper plate body is made of non-metal materials. A flow channel groove is formed in the opposite side of the lower plate body and / or the upper plate body in a coiled mode, a flow channel pipe made of metal materials is embedded in the flow channel groove, the section of the flow channel pipe is in a flat hollow shape, the flow channel pipe and the lower plate body are fixed in a welded mode, and the lower plate body and the upper plate body are fixed through a pressing mechanism. The sealing structure has the advantages of good sealing effect, stable structure and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid cooling plates for battery packs, and particularly relates to a plate body combining mechanism for a liquid cooling plate of a battery pack. Background Art

[0002] The types of liquid cooling systems generally include fin type, flow channel type, and cooling pipe type. The fin type and flow channel type are generally in the form of liquid cooling plates, which are installed at the bottom or top of the battery pack. The double-sided clamping tube process is the most commonly used manufacturing process for liquid cooling plates of liquid cooling radiators. It is formed by pressing an aluminum plate and a copper tube together, and its process is simple and the cost is low. However, in the actual use process, the fitting stability of the existing double-sided clamping tube type liquid cooling plate for battery packs is poor, and the fitting effect of its tube body cannot be guaranteed, which affects the final heat dissipation effect.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a large cylindrical battery system with three-sided liquid cooling [202211520663.7], which includes a power battery module. The power battery module contains at least one battery module, and multiple rows of battery cells are evenly distributed in the battery module; a liquid cooling system, the liquid cooling system includes liquid cooling pipes located on both sides of the power battery module and a liquid cooling plate located on the top of the power battery module; wherein, multiple linearly arranged spaced cooling plates are clamped between the liquid cooling pipes on both sides of the power battery module, and one spaced cooling plate is distributed on both sides of each row of battery cells. The spaced cooling plate is connected to the battery cell through a heat-conducting adhesive, and the liquid cooling plate is connected to the battery cell through a heat-conducting adhesive.

[0004] The above solution solves the problem of battery module cooling to a certain extent, but there are still many deficiencies in this solution, such as poor fitting effect of the tube body and other problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a plate body combining mechanism for a liquid cooling plate of a battery pack with reasonable design and guaranteed tube body fitting effect for the above problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A plate body combining mechanism for a liquid cooling plate of a battery pack includes a lower plate body and an upper plate body arranged in an upper and lower stacked manner. The lower plate body is made of a metal material, and the upper plate body is made of a non-metal material. A coiled flow channel groove is opened on one side of the lower plate body and / or the upper plate body that face each other. A flow channel tube made of a metal material is embedded in the flow channel groove. The cross-section of the flow channel tube is flat and hollow. The flow channel tube is welded and fixed to the lower plate body, and the lower plate body and the upper plate body are fixed through a pressing mechanism.

[0007] In the above plate body combining mechanism for a liquid cooling plate of a battery pack, a convex portion opposite to the flow channel groove is provided on the side of the lower plate body and / or the upper plate body that face away from each other, and the upper plate body is equipped with a strengthening component.

[0008] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the strengthening component includes a strengthening grid distributed on the lower plate body or the upper plate body. The top of the strengthening grid is flush with the top of the convex part, and strengthening seats are arranged at the nodes of the strengthening grid.

[0009] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the crimping mechanism includes crimping holes arranged at the upper end of the lower plate body. The upper plate body has a crimping seat embedded in the crimping holes, and a self-locking component is arranged between the crimping holes and the crimping seat.

[0010] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the self-locking component includes a locking surface arranged on the inner side of the crimping hole. The locking surface is a conical surface and fits and presses against the outer side of the crimping seat. Locking ribs arranged in a central symmetry and meshing with each other are arranged between the locking surface and the crimping seat.

[0011] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, an adhesive layer is arranged between the lower plate body and the upper plate body.

[0012] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the flow channel pipe is selected from copper pipes or aluminum pipes.

[0013] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the distance between the flow channel pipes is not less than 8.0 mm, the thickness of the flow channel pipe of the flow channel pipe is not less than 1.5 mm, and the width of the flow channel pipe is not more than 12.0 mm.

[0014] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the lower plate body is selected from aluminum plates, and the thickness of the lower plate body is 2.5 - 4.0 mm.

[0015] In the plate body bonding mechanism of the above-mentioned battery pack liquid cooling plate, the upper plate body is selected from resin-based composite materials, and the thickness of the upper plate body is 3.5 - 5.0 mm.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows: The pressing force received by the flow channel pipe is ensured between the lower plate body and the upper plate body through the crimping mechanism, effectively reducing the gap between the flow channel pipe and the flow channel groove and improving its heat conduction effect; The upper plate body uses a non-metallic material to improve its heat insulation effect. At the same time, the non-metallic upper plate body improves the impact resistance of the plate body and has a good protective effect on the internal flow channel pipe; The width and thickness of the flow channel pipe are limited to avoid the deformation of the middle part when it is pressed, and improve its structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural cross-sectional view of the present utility model;

[0018] Figure 2 is a partial cross-sectional view of the present utility model;

[0019] Figure 3 is another structural schematic diagram of the present utility model;

[0020] Figure 4 is a partial schematic diagram of the present utility model;

[0021] In the figure, there are a lower plate body 1, an upper plate body 2, a flow channel groove 3, a convex portion 31, a reinforcing grid 32, a reinforcing seat 33, a flow channel pipe 4, a pressing and knotting mechanism 5, a pressing and knotting hole 51, a pressing and knotting seat 52, a locking surface 53, a locking rib 54, and an adhesive layer 6. Specific Embodiment

[0022] The following further elaborates on the present utility model in detail in conjunction with the accompanying drawings and specific embodiments.

[0023] As Figures 1-4 shown, a plate body bonding mechanism of a battery pack liquid cooling plate includes a lower plate body 1 and an upper plate body 2 arranged in an up-and-down stacked manner. The lengths and widths of the lower plate body 1 and the upper plate body 2 are the same, and their edges are flush after fitting and are fixed by threaded parts or riveting structures; in this embodiment, the lower plate body 1 is made of a metal material while the upper plate body 2 is made of a non-metal material. A coiled flow channel groove 3 is formed on one side of the lower plate body 1 and / or the upper plate body 2, and a metal flow channel pipe 4 is embedded in the flow channel groove 3. After the flow channel pipe 4 is fitted with the lower plate body 1, they are integrated; the cross-section of the flow channel pipe 4 is flat and hollow, and the flow channel pipe 4 is fixedly welded to the lower plate body 1. The lower plate body 1 and the upper plate body 2 are fixed by a pressing and knotting mechanism 5, and the pressing and knotting mechanism 5 strengthens the joint of the flow channel pipe 4 to prevent it from loosening after being pressed and ensure that the flow channel pipe 4 is completely fitted with the flow channel groove 3.

[0024] Specifically, since the flow channel groove 3 is usually formed by stamping or injection molding, a convex portion 31 opposite to the flow channel groove 3 is provided on the opposite side of the lower plate body 1 and / or the upper plate body 2, and the upper plate body 2 is equipped with a reinforcing component to improve its anti-deformation ability.

[0025] In-depth, different from the existing rib structures, the reinforcing component includes a reinforcing grid 32 distributed on the lower plate body 1 or the upper plate body 2. The top of the reinforcing grid 32 is flush with the top of the convex portion 31, and reinforcing seats 33 are provided at the nodes of the reinforcing grid 32. The reinforcing seats 33 are evenly distributed and cooperate with the reinforcing grid 32 to ensure the flatness of the plate body, and at the same time, multiple reinforcing seats 33 improve the compressive strength of the plate body.

[0026] Further, the pressing and knotting mechanism 5 is automatically locked after the plate bodies are fitted, including a pressing and knotting hole 51 provided at the upper end of the lower plate body 1, the upper plate body 2 has a pressing and knotting seat 52 embedded in the pressing and knotting hole 51, and a self-locking component is provided between the pressing and knotting hole 51 and the pressing and knotting seat 52. The pressing and knotting holes 51 and the pressing and knotting seats 52 correspond one by one to achieve lateral limitation.

[0027] Furthermore, in order to further increase the fitting area, the self-locking assembly includes a locking surface 53 disposed inside the crimping hole 51. The locking surface 53 is a conical surface and fits and presses against the outer side of the crimping seat 52. Locking ribs 54 are arranged in a centrally symmetric manner and meshed with each other between the locking surface 53 and the crimping seat 52. An adhesive is usually filled between the locking ribs 54 to completely seal the gap therebetween.

[0028] In addition to the conventional thermal pressing combination, a glue layer 6 can be provided between the lower plate body 1 and the upper plate body 2 to achieve the combination of metal and non-metal materials, and part of the colloid flows into the crimping mechanism 5 to ensure the combination effect.

[0029] Meanwhile, the flow channel tube 4 is made of copper tube or aluminum tube. Its closed tube structure effectively reduces liquid leakage, and at the same time it has good thermal conductivity to ensure the overall heat dissipation effect of the liquid-cooled plate.

[0030] Visibly, the distance between the flow channel tubes 4 is not less than 8.0 mm, the thickness of the flow channel tube 4 of the flow channel tube 4 is not less than 1.5 mm, and the width of the flow channel tube 4 is not more than 12.0 mm. In this embodiment, the distance between the flow channel tubes 4 is 6 mm, its thickness is 2.0 mm and the width is 10 mm. This specification can effectively improve the anti-deformation ability of the middle part of the flat flow channel tube 4 and avoid the narrowing of the flow channel caused by the bending of the middle part of the flow channel tube 4 when it is pressed.

[0031] Obviously, the lower plate body 1 is made of aluminum plate, and the thickness of the lower plate body 1 is 2.5 - 4.0 mm. Preferably, the lower plate body 1 with a thickness of 3.0 mm is used. The lower plate body 1 is usually integrally formed with the battery upper cover, taking into account both the heat dissipation effect and the structural strength.

[0032] Preferably, the upper plate body 2 is made of a resin-based composite material, which has good plasticity and heat insulation performance. The thickness of the upper plate body 2 is 3.5 - 5.0 mm. In this embodiment, the upper plate body 2 with a thickness of 4 mm is preferably used. It is attached to the aluminum lower plate body 1 by glue. The resin-based composite material also has good corrosion resistance and has lower requirements for glue.

[0033] In summary, the principle of this embodiment is that a flow channel groove 3 is left between the lower plate body 1 and the upper plate body 2 for the flow channel tube 4 to be pressed in. The flow channel tube 4 is welded to the lower plate body 1 as a whole. The crimping mechanism 5 therebetween provides sufficient pressing torque after fitting to ensure the fitting tightness of the lower plate body 1 and the upper plate body 2.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although terms such as lower plate body 1, upper plate body 2, runner groove 3, convex part 31, strengthening grid 32, strengthening seat 33, runner pipe 4, compression mechanism 5, compression hole 51, compression seat 52, locking surface 53, locking rib 54, adhesive layer 6, etc. are used more frequently in this text, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A plate body bonding mechanism for a liquid cooling plate of a battery pack, comprising a lower plate body (1) and an upper plate body (2) arranged in an up-and-down stacked manner. The lower plate body (1) is made of a metal material, and the upper plate body (2) is made of a non-metal material. It is characterized in that, On the opposite side of the lower plate body (1) and / or the upper plate body (2), there is a coiled flow channel groove (3) provided. A flow channel pipe (4) made of metal material is embedded in the flow channel groove (3). The cross-section of the flow channel pipe (4) is flat and hollow. The flow channel pipe (4) is fixedly welded to the lower plate body (1). The lower plate body (1) and the upper plate body (2) are fixed by a crimping mechanism (5).

2. The plate body combining mechanism of a battery pack liquid cooling plate according to claim 1, characterized in that, On the opposite side of the lower plate body (1) and / or the upper plate body (2), there is a convex portion (31) opposite to the flow channel groove (3). The upper plate body (2) is equipped with a strengthening component.

3. The plate body combining mechanism of a battery pack liquid cooling plate according to claim 2, characterized in that, The strengthening component includes a strengthening grid (32) distributed on the lower plate body (1) or the upper plate body (2). The top of the strengthening grid (32) is flush with the top of the convex portion (31). Strengthening seats (33) are arranged at the nodes of the strengthening grid (32).

4. The plate body combination mechanism of a battery pack liquid cooling plate according to claim 1, characterized in that, The crimping mechanism (5) includes a crimping hole (51) provided at the upper end of the lower plate body (1). The upper plate body (2) has a crimping seat (52) embedded in the crimping hole (51). A self-locking component is arranged between the crimping hole (51) and the crimping seat (52).

5. The plate body combination mechanism of a battery pack liquid cooling plate according to claim 4, characterized in that, The self-locking component includes a locking surface (53) provided on the inner side of the crimping hole (51). The locking surface (53) is a conical surface and is tightly attached to and pressed against the outer side of the crimping seat (52). Locking ribs (54) arranged in a central symmetry and meshing with each other are arranged between the locking surface (53) and the crimping seat (52).

6. The plate body combination mechanism of a battery pack liquid cooling plate according to claim 1, characterized in that, An adhesive layer (6) is arranged between the lower plate body (1) and the upper plate body (2).

7. The plate body combining mechanism of a battery pack liquid cooling plate according to claim 1, characterized in that, The flow channel pipe (4) is selected from copper pipes or aluminum pipes.

8. The plate body combining mechanism of a battery pack liquid cooling plate according to claim 7, characterized in that, The spacing between the flow channel pipes (4) is not less than 8.0 mm. The thickness of the flow channel pipe (4) of the flow channel pipe (4) is not less than 1.5 mm. The width of the flow channel pipe (4) is not greater than 12.0 mm.

9. The plate body combination mechanism of a battery pack liquid cooling plate according to claim 1, characterized in that, The lower plate body (1) is selected from aluminum plates, and the thickness of the lower plate body (1) is 2.5 - 4.0 mm.

10. The plate body combining mechanism of a battery pack liquid cooling plate according to claim 1, characterized in that, The upper plate body (2) is selected from resin-based composite materials, and the thickness of the upper plate body (2) is 3.5 - 5.0 mm.

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