Profile liquid cooling plate and battery pack

Abstract

The utility model discloses a profile liquid cooling plate and battery pack, the profile liquid cooling plate includes aluminum extrusion cavity, side beam, middle crossbeam, inlet joint and outlet joint, wherein the inside of aluminum extrusion cavity is divided into a plurality of branches for refrigerant flow, the inlet joint and outlet joint are respectively located at the both ends of aluminum extrusion cavity for refrigerant inflow and outflow. In the utility model, the two ends of the middle cross beam are welded with the aluminum extrusion cavity through the side plates, the side surfaces of the side plates are welded on the side surfaces of the aluminum extrusion cavity, the end parts of the middle cross beam are welded on the upper surfaces of the side plates, and the middle part of the middle cross beam is adhered with the aluminum extrusion cavity through the structural adhesive. According to the sectional material liquid cooling plate, high-strength connection of the middle cross beam and the aluminum extrusion cavity is achieved through a composite mode of welding the two sides and gluing the middle structural adhesive, the structural strength of the whole sectional material liquid cooling plate can be improved, the risk of weld penetration in the welding process is reduced, and the yield of similar sectional material liquid cooling plates produced by liquid cooling plate manufacturers is improved.

Description

Technical Field

[0001] This utility model relates to a profile liquid cooling plate and a battery pack, belonging to the field of battery pack sheet technology. Background Technology

[0002] Currently, mainstream automotive battery pack liquid cooling plates are mainly divided into stamped liquid cooling plates and profiled liquid cooling plates. Among them, profiled liquid cooling plates have higher strength and are mostly used in the design of battery pack thermal management systems where the liquid cooling plate needs to bear weight. The thickness of profiled liquid cooling plates is usually 8mm and 10mm, corresponding to wall thicknesses of 2mm and 2.5mm respectively, and the cavity height of profiled liquid cooling plates is 4mm and 5mm. The cavity of the profiled liquid cooling plate is filled with refrigerant, which can facilitate heat exchange with the battery module and also provide good load-bearing capacity.

[0003] For the design of vehicle battery packs converted from gasoline to electric vehicles, due to the relatively narrow space of the battery pack, the thickness of the profile liquid cooling plate is usually compressed to the extreme, with some having a wall thickness of only 1.0mm to 1.5mm. At the same time, in order to fix the battery module above, it is also necessary to weld crossbeams for fixing the battery module on the flow channel. During this welding process, there is a risk of insufficient welding strength or even weld penetration, which affects the performance of the entire profile liquid cooling plate and reduces the production yield of the liquid cooling plate manufacturer. Utility Model Content

[0004] The purpose of this utility model is to provide a profile liquid cooling plate and a battery pack, which solves the problem of insufficient welding strength of the current battery pack profile liquid cooling plate and reduces the risk of weld burn-through in the current profile liquid cooling plate welding process.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a profile liquid-cooled plate, including an aluminum extrusion cavity; the interior of the aluminum extrusion cavity is divided into several branches for refrigerant flow; one end of the aluminum extrusion cavity is provided with an inlet connector for refrigerant inflow; the other end is provided with an outlet connector for refrigerant outflow; side beam one and side beam two are respectively provided on both sides of the aluminum extrusion cavity for sealing the ends of the aluminum extrusion cavity; a middle crossbeam is welded to the upper middle of the aluminum extrusion cavity; the inlet connector end and the outlet connector end of the aluminum extrusion cavity are respectively provided with a blocking strip one and a blocking strip two; the middle crossbeam is connected to the aluminum extrusion cavity by a composite method of welding at both ends and adhesive bonding in the middle.

[0007] Preferably, the two ends of the intermediate crossbeam are welded to the aluminum extrusion cavity via side plates, the side of the side plate is welded to the side of the aluminum extrusion cavity, and the end of the intermediate crossbeam is welded to the upper surface of the side plate.

[0008] The middle part of the intermediate crossbeam is bonded to the aluminum extrusion cavity with structural adhesive.

[0009] Preferably, the upper surface of the intermediate crossbeam is provided with an injection hole at the middle position for injecting structural adhesive; the lower surface of the intermediate crossbeam is provided with an injection cavity in the non-welding area, through which the injection cavity is bonded to the aluminum extrusion cavity.

[0010] Preferably, vent holes are symmetrically provided on both sides of the injection hole.

[0011] Preferably, both sides of the end of the intermediate crossbeam are chamfered.

[0012] Preferably, the inlet and outlet joints of the profile liquid cooling plate are welded to the aluminum extrusion cavity by argon arc welding.

[0013] Preferably, the side beam, the blocking strip, and the side plate are welded to the aluminum extrusion cavity by friction stir welding.

[0014] Preferably, the aluminum extrusion cavity and the lower part of the side beam are provided with supports.

[0015] This utility model also provides a battery pack, including the above-mentioned profile liquid cooling plate.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model provides a profile liquid cooling plate and a battery pack. The profile liquid cooling plate achieves a high-strength connection between the middle crossbeam and the aluminum extrusion cavity through a composite method of welding on both sides and bonding with structural adhesive in the middle. This can improve the structural strength of the entire profile liquid cooling plate, reduce the risk of weld burn-through during the welding process, and improve the yield rate of similar profile liquid cooling plates produced by liquid cooling plate manufacturers.

[0018] This utility model has a reasonable design. The liquid cooling plate has a simple structure, is easy to process, and has high heat exchange capacity and excellent structural strength. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the profile liquid cooling plate structure provided by this utility model;

[0020] Figure 2 A schematic diagram of the flow channel for the profile liquid cooling plate provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the welding of the profile liquid cooling plate provided by this utility model;

[0022] Figure 4 This is a schematic diagram showing the connection between the middle crossbeam and the aluminum extrusion cavity in this utility model;

[0023] Figure 5 This is a schematic diagram of the middle crossbeam structure in this utility model;

[0024] Figure 6 This is a schematic diagram of the glue injection cavity design for the middle crossbeam in this utility model. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "end", "bottom", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a direct connection, or a connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Secondly, the term "an embodiment" or "embodiment" as used in this utility model refers to a specific feature, structure, or characteristic that can be included in at least one implementation of this utility model. The phrase "in an embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] This utility model provides a profile liquid-cooled plate, such as Figure 1 As shown, the device includes an aluminum extrusion cavity 1, the interior of which is divided into several branches for refrigerant flow. One end of the aluminum extrusion cavity 1 has an inlet connector 5 for refrigerant inflow, and the other end has an outlet connector 6 for refrigerant outflow. Side beams 2 and 3 are respectively provided on both sides of the aluminum extrusion cavity 1, which are used to seal the ends of the aluminum extrusion cavity 1. A central crossbeam 4 is welded to the upper middle of the aluminum extrusion cavity 1. A plug strip 9 and a plug strip 10 are respectively provided at the inlet and outlet ends of the aluminum extrusion cavity 1.

[0031] In this utility model, the two ends of the middle crossbeam 4 are welded to the aluminum extrusion cavity via side plates, such as... Figure 1Side plate 7 and side plate 8 are provided. Specifically, the sides of the side plates are welded to the sides of the aluminum extrusion cavity 1, and the ends of the intermediate crossbeam 4 are welded to the upper surface of the side plates.

[0032] It should be noted that the profile liquid cooling plate also includes several supports 11 for supporting the aluminum extrusion cavity and side beams.

[0033] like Figure 2 As shown, in this utility model, the refrigerant flows in from the inlet joint of the profile liquid cooling plate, splits into several branches in the aluminum extrusion cavity, and then flows out from the outlet joint. The flow direction of the refrigerant, that is, the main flow direction of the profile liquid cooling plate, is perpendicular to the middle crossbeam.

[0034] like Figure 3 As shown, in this utility model, the inlet joint 5 and outlet joint 6 of the profile liquid cooling plate are welded to the aluminum extrusion cavity 1 by argon arc welding. Side beam 1 2, side beam 2 3, blocking strip 1 9, blocking strip 2 10, side plate 1 7 and side plate 2 8 are welded to the aluminum extrusion cavity 1 by friction stir welding. Several supports 11 are welded to side beam 1 2, aluminum extrusion cavity 1 and side beam 2 3 by argon arc welding respectively.

[0035] In this invention, the intermediate crossbeam 4 and the aluminum extrusion cavity 1 are connected together by a combination of argon arc welding and structural adhesive bonding. Specifically, the welding area and the adhesive bonding area are as follows: Figure 4 As shown, the end of the middle crossbeam 4 is welded to the upper surface of the side plate by argon arc welding, and the side of the side plate is welded to the side of the aluminum extrusion cavity; the middle part of the middle crossbeam 4 is bonded to the aluminum extrusion cavity 1 by structural adhesive.

[0036] like Figure 5 and Figure 6 As shown, in this invention, a glue injection hole 12 is provided at the center of the upper surface of the intermediate crossbeam 4, and a glue injection cavity 14 is provided on the lower surface of the intermediate crossbeam 4. Four vent holes 13 are symmetrically designed on both sides of the glue injection hole. After the two sides of the intermediate crossbeam are fixed to the aluminum extrusion cavity by argon arc welding, structural adhesive can be injected into the glue injection cavity 14 of the intermediate crossbeam from top to bottom through the glue injection hole 12. When the structural adhesive is found to overflow from the four vent holes 13 on both sides, the injection of structural adhesive is stopped. After the structural adhesive cures, the intermediate crossbeam can achieve a high-strength connection with the aluminum extrusion cavity.

[0037] Further, see Figure 5 Both sides of the middle crossbeam end are designed with chamfers, which can increase the welding contact area between the middle crossbeam and the profile liquid cooling plate during the argon arc welding process and improve the welding strength.

[0038] This utility model also provides a battery pack, including the above-mentioned profile liquid cooling plate.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A profile liquid-cooled plate, characterized in that, The device includes an aluminum extrusion cavity; the interior of the aluminum extrusion cavity is divided into several branches for refrigerant flow; one end of the aluminum extrusion cavity is provided with an inlet connector for refrigerant inflow; the other end is provided with an outlet connector for refrigerant outflow; side beam one and side beam two are respectively provided on both sides of the aluminum extrusion cavity for sealing the ends of the aluminum extrusion cavity; a central crossbeam is welded to the upper middle of the aluminum extrusion cavity; the inlet connector end and the outlet connector end of the aluminum extrusion cavity are respectively provided with a blocking strip one and a blocking strip two; the central crossbeam is connected to the aluminum extrusion cavity by a composite method of welding at both ends and adhesive bonding in the middle.

2. The profile liquid-cooled plate according to claim 1, characterized in that, The two ends of the intermediate crossbeam are welded to the aluminum extrusion cavity via side plates. The side of the side plate is welded to the side of the aluminum extrusion cavity, and the end of the intermediate crossbeam is welded to the upper surface of the side plate. The middle part of the intermediate crossbeam is bonded to the aluminum extrusion cavity with structural adhesive.

3. The profile liquid-cooled plate according to claim 2, characterized in that, The upper surface of the intermediate crossbeam is provided with an injection hole in the middle for injecting structural adhesive; the lower surface of the intermediate crossbeam is provided with an injection cavity in the non-welding area, through which the injection cavity is bonded to the aluminum extrusion cavity.

4. A profile liquid-cooled plate according to claim 3, characterized in that, Venting holes are symmetrically provided on both sides of the injection hole.

5. A profile liquid-cooled plate according to claim 2, characterized in that, Both sides of the end of the intermediate crossbeam are chamfered.

6. A profile liquid-cooled plate according to claim 1, characterized in that, The inlet and outlet joints of the profile liquid cooling plate are welded to the aluminum extrusion cavity by argon arc welding.

7. A profile liquid-cooled plate according to claim 2, characterized in that, The side beams, blocking strips, and side plates are welded to the aluminum extrusion cavity by friction stir welding.

8. A profile liquid-cooled plate according to claim 1, characterized in that, The aluminum extrusion cavity and the lower part of the side beam are provided with supports.

9. A battery pack, characterized in that, Includes the profile liquid-cooled plate as described in any one of claims 1 to 8.

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