Integrated aluminum die-cast battery pack water cooling plate

Abstract

The utility model discloses a battery pack water cooling plate integrally formed by aluminum die-casting, which comprises a cooling plate main body and a flat-plate-shaped aluminum alloy cover plate which are integrally formed by aluminum die-casting, and the cooling plate main body comprises a middle body and extending bodies integrally formed on two sides; the first side of the middle body is provided with a concave water-cooling groove, and the edge of a groove opening of the water-cooling groove is provided with an annular placing part; the aluminum alloy cover plate is arranged on the annular shelving part, the bottom face of the aluminum alloy cover plate abuts against the end face of the isolation wall, and the junction of the aluminum alloy cover plate and the cooling plate body is connected into a whole through friction stir welding; a plurality of isolation walls are arranged in the water cooling tank and divide the water cooling tank into a cooling channel consisting of at least two runner units which are isolated from each other and are communicated end to end; the outer side of the extension body is provided with a water inlet hole and a water outlet hole which penetrate through the head and the tail of the cooling channel, and the design cancels complex assembly procedures and required fasteners and sealing elements, greatly simplifies the production process, and reduces the manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery pack technology, and in particular to an integrated aluminum die-cast battery pack water cooling plate, which serves as a cooling device for the battery pack. Background Technology

[0002] As the core power component driving this green revolution, the performance and reliability of battery packs are increasingly becoming the focus of industry attention. During continuous operation, battery packs generate a significant amount of heat. If this heat cannot be effectively dissipated, it will not only weaken battery performance and shorten its lifespan but may also trigger serious safety hazards such as thermal runaway. Therefore, building an efficient thermal management system is crucial for new energy vehicle battery packs and has become an indispensable core technology. The water-cooled plate, as the "heart" of the thermal management system, is so critically important that its ingenious design and sophisticated manufacturing process determine the overall system efficiency.

[0003] Existing manufacturing processes for battery pack water cooling plates typically involve extruding the central main housing from aluminum alloy and die-casting the side components. During assembly, the side components are first bolted onto the main housing. For example, patent CN221613985U discloses a cooling device and battery pack. The cooling device includes a liquid cooling plate and two connecting parts. The liquid cooling plate contains a first and second layer of cooling channels extending along a first direction. The two connecting parts are respectively assembled to both ends of the liquid cooling plate, encapsulating the through-flow liquid cooling plate and forming a complete flow channel structure.

[0004] However, this production process has the following problems:

[0005] Complex process: Existing production processes involve multiple processing and assembly steps, including welding and bolting, resulting in low production efficiency and difficulty in meeting the needs of large-scale production.

[0006] High manufacturing costs: The complex process not only increases production time but also raises material and labor costs, resulting in high manufacturing costs for water-cooled plates.

[0007] Limited sealing performance: Since the sealing of water-cooled plates relies on sealing rings and bolt connections, the sealing rings are subject to assembly process limitations. As the sealing rings age, they can easily lead to product leakage, thus affecting the reliability and service life of the product.

[0008] The product has a short service life: the complex assembly structure and sealing issues make the water-cooled plate prone to failure during long-term use, which in turn affects the overall performance and service life of the battery pack. Summary of the Invention

[0009] The technical problem to be solved by this utility model is to provide an integrated aluminum die-cast water cooling plate for battery packs.

[0010] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an integrated aluminum die-cast battery pack water cooling plate, including a cooling plate body formed by integrated aluminum die-casting and a flat aluminum alloy cover plate. The cooling plate body includes a middle body and two integrally formed extensions on both sides. A concave water cooling groove is provided on the first side of the cooling plate body, and an annular resting part is provided at the edge of the groove opening. The aluminum alloy cover plate is placed on the annular resting part, and the bottom surface of the aluminum alloy cover plate abuts against the end face of the isolation wall. The junction of the aluminum alloy cover plate and the cooling plate body is connected as one piece by friction stirring welding.

[0011] The water-cooled tank is provided with multiple isolation walls, which divide the water-cooled tank into cooling channels consisting of at least two mutually isolated but interconnected flow channel units; the outer side of the extension body is provided with water inlet and water outlet holes that run through the beginning and end of the cooling channels.

[0012] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a first annular protrusion is provided on the periphery of the second side of the intermediate body, and a functional area for arranging battery units is formed in the middle of the first annular protrusion.

[0013] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is that the functional area is covered with an insulating coating.

[0014] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the multiple isolation walls extend along the length direction of the main body of the cooling plate, and the multiple flow channel units are parallel to each other.

[0015] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the number of the flow channel units is even, and the water inlet and water outlet are located on the same side of the same extension.

[0016] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is that the two sides of the isolation wall are wavy.

[0017] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a second annular protrusion is provided on the periphery of the first side of the intermediate body, an annular plane is provided between the water cooling tank and the second annular protrusion, and the outer surface of the aluminum alloy cover plate is flush with the annular plane.

[0018] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is: an integrated aluminum die-cast battery pack water cooling plate, including a cooling plate body made of integrated aluminum die casting and a flat aluminum alloy cover plate;

[0019] The first side of the cooling plate body is provided with a recessed water cooling groove, and the aluminum alloy cover plate closes the water cooling groove and is connected to the cooling plate body by friction stirring welding.

[0020] The second side of the cooling plate body is provided with a functional area for accommodating battery cells, and the functional area is covered with an insulating coating.

[0021] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the water cooling tank is provided with multiple isolation walls, the isolation walls divide the water cooling tank into a cooling channel composed of at least two mutually isolated but interconnected flow channel units; one end of the cooling plate body is provided with a water inlet hole and a water outlet hole that pass through the beginning and end of the cooling channel.

[0022] The preferred technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a first annular protrusion is provided on the periphery of the second side of the intermediate body, and the functional area is formed in the middle of the first annular protrusion.

[0023] The outer periphery of the first side of the cooling plate body is provided with a second annular protrusion, and an annular plane is provided between the water cooling tank and the second annular protrusion. The outer surface of the aluminum alloy cover plate is flush with the annular plane.

[0024] Compared with existing technologies, the advantages of this invention are: this design eliminates complex assembly processes and the required fasteners and seals, greatly simplifying the production process and reducing manufacturing costs. Friction welding offers higher sealing performance and reliability compared to traditional bolt connections or sealing rings, effectively solving the problem of leakage caused by sealing ring aging in traditional processes. Furthermore, compared to the original extrusion molding process, it is easier to form more complex flow channel structures, avoiding the limitation of straight flow channel designs. Attached Figure Description

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0026] Figure 1 Schematic diagram of a one-piece die-cast aluminum battery pack water cooling plate Figure 1 ;

[0027] Figure 2 Schematic diagram of a one-piece die-cast aluminum battery pack water cooling plate Figure 2 ;

[0028] Figure 3 Disassembly of a one-piece die-cast aluminum battery pack water cooling plate Figure 1 ;

[0029] Figure 4 Disassembly of a one-piece die-cast aluminum battery pack water cooling plate Figure 2 . Detailed Implementation

[0030] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of the invention.

[0031] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. Similarly, "first" and "second" are only for ease of understanding and have no other directional meaning, and should not be considered as limitations on this invention.

[0033] like Figure 1-4 As shown, an integrated aluminum die-cast battery pack water cooling plate includes a cooling plate body 1 and a flat aluminum alloy cover plate 2. The cooling plate body 1 has a recessed water cooling groove 3 on its first side. The aluminum alloy cover plate 2 encloses the water cooling groove 3 and is integrally connected to the cooling plate body 1 by friction stir welding. One side of the cooling plate body 1 has an inlet hole 41 and an outlet hole 42 communicating with the water cooling groove 3.

[0034] This embodiment of the water-cooled plate employs a combination of integrated aluminum die-casting and friction welding technology, reducing the traditional multi-part welding and assembly to a welding combination of two main parts. This design eliminates complex assembly processes and the required fasteners and seals, greatly simplifying the production process and reducing manufacturing costs. Compared to traditional bolt connections or sealing rings, friction welding offers higher sealing performance and reliability, effectively solving the leakage problem caused by sealing ring aging in traditional processes. Furthermore, compared to the original extrusion molding process, it is easier to form more complex flow channel structures, avoiding the limitation of linear flow channel designs.

[0035] Specifically, such as Figure 3-4 As shown, the cooling plate body 1 includes a middle body 11 and two integrally formed extensions 12 on both sides. As shown, the first side in the middle is provided with a recessed water-cooling tank 3, and the edge of the water-cooling tank 3 is provided with an annular support portion 5. An aluminum alloy cover plate 2 is placed on the annular support portion 5, and the bottom surface of the aluminum alloy cover plate 2 abuts against the end face of the isolation wall 6. The junction of the aluminum alloy cover plate 2 and the cooling plate body 1 is connected as one piece by friction stir welding.

[0036] The design of the annular support part 5 provides positioning for the aluminum alloy cover plate 2 during friction welding, which is more conducive to ensuring the accuracy of the position of the aluminum alloy cover plate 2 and the cooling plate body 1.

[0037] like Figure 3-4 As shown, the cooling tank is equipped with multiple isolation walls 6, which divide the water-cooled tank 3 into cooling channels consisting of at least two mutually isolated but interconnected flow channel units 31. The outer side of the extension 12 is provided with inlet holes 41 and outlet holes 42 that run through the beginning and end of the cooling channels. This design not only enables more complex cooling channel structures but also optimizes the flow path of the coolant, improving heat dissipation efficiency.

[0038] In other preferred embodiments, the two sides of the partition wall 6 are wavy, so that the flow channel wall of each flow channel unit 31 is wavy. Preferably, the wavy structures of the two flow channel walls of a flow channel unit 31 are parallel to each other, which helps to enhance the turbulence effect of the coolant and improve the heat exchange efficiency.

[0039] like Figure 3-4 As shown, multiple isolation walls 6 extend along the length of the cooling plate body 1, and multiple flow channel units 31 are parallel to each other. The number of flow channel units 31 is even, and the water inlet 41 and water outlet 42 are located on the same side of the same extension 12. This design helps to simplify the battery pack layout design, optimize the flow path of the coolant, and improve cooling efficiency.

[0040] like Figure 2As shown, a first annular protrusion 6 is provided on the periphery of the second side of the intermediate body 11. A functional area 7 for placing the battery cell is formed in the middle of the first annular protrusion 6, and the functional area 7 is covered with an insulating coating. The first annular protrusion 6 realizes the stable placement of the battery cell.

[0041] like Figure 1 As shown, the outer periphery of the first side of the intermediate body 11 is provided with a second annular protrusion 8, and an annular plane 9 is provided between the water cooling tank 3 and the second annular protrusion 8. The outer surface of the aluminum alloy cover plate 2 is flush with the annular plane 9.

[0042] This invention introduces the integrated aluminum die-cast battery pack water cooling plate provided by the present invention. Specific examples are used to illustrate the principles and implementation methods of the invention. The descriptions of the above embodiments are only for the purpose of helping to understand the invention and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An integrated aluminum die-cast battery pack water cooling plate characterized by: The application relates to an integrated aluminum die-casting battery pack water cooling plate which comprises a flat aluminum alloy cover plate and a cooling plate body which is integrally formed by aluminum die-casting. The water cooling groove is internally provided with a plurality of isolation walls, the isolation walls divide the water cooling groove into a cooling channel which is composed of at least two flow channel units which are isolated from each other and connected in a head-to-tail mode; the outer side of the extension body is provided with an inlet water hole and an outlet water hole which penetrate the cooling channel in a head-to-tail mode; the aluminum alloy cover plate is arranged on the annular resting portion, the bottom surface of the aluminum alloy cover plate is in abutment with the end surface of the isolation wall, and the aluminum alloy cover plate and the cooling plate body are integrally connected through friction stir welding.

2. The integrated aluminum die-casting battery pack water cooling plate according to claim 1, wherein: the second side of the intermediate body is provided with a first annular protrusion in the periphery, and the first annular protrusion is internally formed with a functional area for arranging battery units.

3. The integrated aluminum die-casting battery pack water cooling plate according to claim 2, wherein: the functional area is covered with an insulating coating.

4. The integrated aluminum die-casting battery pack water cooling plate according to claim 1, wherein: the plurality of isolation walls extend along the length direction of the cooling plate body, and the plurality of flow channel units are parallel to each other.

5. The integrated aluminum die-casting battery pack water cooling plate according to claim 4, wherein: the number of the flow channel units is even, and the inlet water hole and the outlet water hole are located on the same side of the same extension body.

6. The integrated aluminum die-casting battery pack water cooling plate according to claim 1, wherein: the two side surfaces of the isolation wall are in a wavy shape.

7. The integrated aluminum die-casting battery pack water cooling plate according to claim 1, wherein: the first side of the intermediate body is provided with a second annular protrusion in the periphery, an annular plane is arranged between the water cooling groove and the second annular protrusion, and the outer surface of the aluminum alloy cover plate is flush with the annular plane. The application relates to an integrated aluminum die-casting battery pack water cooling plate which comprises a flat aluminum alloy cover plate and a cooling plate body which is integrally formed by aluminum die-casting. The first side of the cooling plate body is provided with a concave water cooling groove, the aluminum alloy cover plate closes the water cooling groove and is integrally connected with the cooling plate body through friction stir welding; The second side of the cooling plate body is provided with a functional area for arranging battery units, and the functional area is covered with an insulating coating. The water cooling groove is internally provided with a plurality of isolation walls, the isolation walls divide the water cooling groove into a cooling channel which is composed of at least two flow channel units which are isolated from each other and connected in a head-to-tail mode; the outer side of the extension body is provided with an inlet water hole and an outlet water hole which penetrate the cooling channel in a head-to-tail mode; the aluminum alloy cover plate is arranged on the annular resting portion, the bottom surface of the aluminum alloy cover plate is in abutment with the end surface of the isolation wall, and the aluminum alloy cover plate and the cooling plate body are integrally connected through friction stir welding.

10. The integrated aluminum die-casting battery pack water cooling plate according to claim 8, wherein: the cooling plate body comprises an intermediate body and extension bodies which are integrally formed on two sides of the intermediate body; the periphery of the second side of the intermediate body is provided with a first annular protrusion, and the first annular protrusion is internally formed with the functional area. ​ 8. An integrated aluminum die-cast battery pack water cooling plate characterized by: ​ ​ ​ 9. The integrated aluminum die cast battery pack water cooling plate of claim 8, wherein: ​ ​ ​ The outer periphery of the first side of the cooling plate body is provided with a second annular protrusion, and an annular plane is arranged between the water cooling groove and the second annular protrusion, and the outer surface of the aluminum alloy cover plate is flush with the annular plane.

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