Battery pack tray assembly

Abstract

The utility model discloses a battery pack tray assembly which comprises a liquid cooling substrate used for cooling a battery module and a boundary beam frame located on the periphery of the bottom of the liquid cooling substrate, and the liquid cooling substrate comprises an upper liquid cooling substrate located on the upper portion and a lower liquid cooling substrate attached to the bottom of the upper liquid cooling substrate. The surface of the upper liquid-cooled substrate is recessed inwards to form a first planar disc-shaped area for accommodating a battery module, and the disc edge around the upper liquid-cooled substrate is horizontally folded outwards to form a first flange; the surface of the lower liquid cooling substrate is recessed inwards to form a second plane disc-shaped area attached to the first plane disc-shaped area, and the disc edge on the periphery of the lower liquid cooling substrate is horizontally folded outwards to form a second flange attached to the first flange. And a gluing process between the edge beam frame and the upper liquid cooling substrate is canceled, so that the production process is simplified, and the stability and the reliability of the whole structure are improved. And the second front flanging of the lower liquid cooling substrate is smoothly connected with the second planar disc-shaped area through the inclined surface, so that the resistance in a medium flowing process can be remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and more specifically to a battery pack tray assembly. Background Art

[0002] The battery pack box is the load-bearing component of the energy storage battery pack. The battery pack box includes an upper cover and a tray assembly at the bottom that holds the battery module. Figure 6 The existing tray assembly includes a liquid cooling plate 1 and a side beam frame 2 located above the liquid cooling plate 1 and surrounded by the side beam frame 2. The inner bottom surface of the side beam frame 2 that contacts the upper surface of the liquid cooling plate 1 is concave inward, thus forming a concave space, which is used for applying sealant.

[0003] During the assembly process, the inner bottom surface of the side beam frame 2 and the upper surface of the liquid cooling plate 1 (that is, the location of the recessed portion) are fixed by applying sealant, and the outer bottom surface of the side beam frame 2 is fixed to the liquid cooling plate by riveting.

[0004] There are some obvious problems with this fixing method. First, the process steps involved are relatively complicated, which increases the difficulty of production and assembly. Second, the sealant will age after a long period of use, which may lead to a decrease in sealing performance and increase the risk of leakage. Therefore, it is necessary to improve the existing fixing method to simplify the process, improve production efficiency, and reduce the risk of leakage. Utility Model Content

[0005] Technical problem to be solved by the utility model: The purpose of the utility model is to overcome the technical defects of the complicated fixing process of the side beam frame and the upper liquid cooling substrate surface of the existing battery pack tray assembly in the prior art, provide a new structure for fixing, eliminate the gluing process, simplify the production process, and improve the stability and reliability of the overall structure.

[0006] Technical solution: In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is: a battery pack tray assembly, comprising a liquid-cooling substrate for cooling a battery module, and a side beam frame located around the bottom of the liquid-cooling substrate, characterized in that: the liquid-cooling substrate comprises an upper liquid-cooling substrate located at the upper part and a lower liquid-cooling substrate attached to the bottom of the upper liquid-cooling substrate, the surface of the upper liquid-cooling substrate is recessed inward to form a first planar disc-shaped area for holding the battery module, and the disc edge around the upper liquid-cooling substrate is folded outward horizontally to form a first flange; the surface of the lower liquid-cooling substrate is recessed inward to form a second planar disc-shaped area attached to the first planar disc-shaped area, and the disc edge around the lower liquid-cooling substrate is folded outward horizontally to form a second flange attached to the first flange.

[0007] As a further improvement of the present invention, the first flange formed by horizontally folding the disk edge around the upper liquid-cooled substrate includes a first front flange, a first rear flange, a first left flange and a first right flange along the four directions of the disk edge front, back, left and right, and the disk edge around the lower liquid-cooled substrate is horizontally folded outward to form a second front flange, a second rear flange, a second left flange and a second right flange that fit therewith.

[0008] As a further improvement of the utility model, the second front flange and the second planar disc-shaped area are smoothly connected via an inclined surface, and the angle between the inclined surface and the second planar disc-shaped area is 10-90°.

[0009] As a further improvement of the present invention, a chamfer design with a radius of R is adopted at the connection between the inclined surface and the second flange and at the connection between the inclined surface and the second planar disc-shaped area.

[0010] As a further improvement of the present invention, the radius R has a value range of 3-20 mm.

[0011] As a further improvement of the utility model, the side beam frame is located at the bottom of the second front flange, the second rear flange, the second left flange and the second right flange of the lower liquid-cooled base plate, thereby enclosing a square frame.

[0012] As a further improvement of the utility model, a guard plate structure is arranged at the bottom of the lower liquid-cooling base plate, and the guard plate structure is composed of a guard plate beam body arranged parallel to the bottom of the lower liquid-cooling base plate.

[0013] As a further improvement of the present invention, the second rear flange, the second left flange and the second right flange are connected to the second planar disc-shaped area through a vertical surface.

[0014] Beneficial effects: Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] 1. The battery tray structure provided by the utility model has a side beam frame located at the bottom of the liquid-cooled substrate, which supports the liquid-cooled substrate, eliminates the gluing process between the side beam frame and the upper liquid-cooled substrate, simplifies the production process, greatly reduces the risk of leakage, and improves the stability and reliability of the overall structure.

[0016] 2. The second front flange of the lower liquid-cooling base plate and the second planar disc-shaped area are smoothly connected via an inclined surface, which can significantly reduce the resistance of the medium flow process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an assembly diagram of the tray assembly of the energy storage battery pack of the utility model

[0018] Figure 2 An exploded view of the tray assembly of the energy storage battery pack of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the liquid cooling base plate;

[0020] Figure 4 is a structural schematic diagram of the lower liquid cooling base plate;

[0021] Figure 5 is a schematic diagram of the angle between the inclined surface and the second plane disk-shaped area;

[0022] Figure 6 This is a structural diagram of the original pallet assembly.

[0023] Explanation of the symbols in the schematic diagram:

[0024] 1. Liquid-cooled substrate; 11. Upper liquid-cooled substrate; 111. First planar disc-shaped area; 112. First front flange; 113. First rear flange; 114. First left flange; 115. First right flange; 12. Lower liquid-cooled substrate; 121. Second planar disc-shaped area; 122. Second front flange; 123. Second rear flange; 124. Second left flange; 125. Second right flange; 13. Medium input end; 14. Medium output end; 15. Medium inlet channel; 16. Medium reflux channel; 17. Medium flow channel; 2. Side beam frame; 3. Guard plate structure; 31. Guard plate beam body; 4. Inclined surface; 5. Liquid inlet pipe; 6. Liquid outlet pipe. DETAILED DESCRIPTION

[0025] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and specific implementation methods.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] like Figure 1-5 A battery pack tray assembly includes a liquid-cooling substrate 1 for cooling a battery module, a side beam frame 2 located around the bottom of the liquid-cooling substrate 1, the side beam frame 2 is combined into a square frame around the bottom of the liquid-cooling substrate to support the liquid-cooling substrate 1, and a guard plate structure 3 at the bottom of the liquid-cooling substrate 1 for improving the structural strength, the guard plate structure 3 is composed of a guard plate beam body 31 located at the bottom of the liquid-cooling substrate.

[0030] The liquid-cooling substrate 1 includes an upper liquid-cooling substrate 11 and a lower liquid-cooling substrate 12 that fit closely together. The upper liquid-cooling substrate 11 is at the top, and the lower liquid-cooling substrate 12 fits on the bottom of the upper liquid-cooling substrate 11. The surface of the upper liquid-cooling substrate 11 is recessed inward to form a first planar disc-shaped area 111 for holding the battery module, and the disc edges around the upper liquid-cooling substrate 11 are horizontally folded outward to form a first flange. Correspondingly, the surface of the lower liquid-cooling substrate 12 is recessed inward to form a second planar disc-shaped area 121 that fits with the first planar disc-shaped area 111, and the disc edges around the lower liquid-cooling substrate 12 are horizontally folded outward to form a second flange that fits with the first flange.

[0031] The first flange formed by the plate edge of the upper liquid-cooled substrate 11 being horizontally folded outward includes flanges in four directions of the plate edge, front, back, left, and right, which are respectively defined as a first front flange 112, a first rear flange 113, a first left flange 114, and a first right flange 115. Correspondingly, the plate edge of the lower liquid-cooled substrate 12 is horizontally folded outward to form a second front flange 122, a second rear flange 123, a second left flange 124, and a second right flange 125. As described in the background technology, refer to Figure 6 In the original structure, the side beam frame 2 is located above the liquid-cooling substrate 1 and is surrounded circumferentially along the liquid-cooling substrate 1. In the utility model, the liquid-cooling substrate 1 is in a disc shape, and the middle is used to hold the battery module. The edge of the disc is horizontally folded around to form a flange. The side beam frame 2 is located at the bottom of the liquid-cooling substrate 1. Specifically, it is located at the bottom of the second front flange 122, the second rear flange 123, the second left flange 124 and the second right flange 125 of the lower liquid-cooling substrate, forming a square frame to support the liquid-cooling substrate 1. The surfaces of the first front flange 112, the first rear flange 113, the first left flange 114 and the first right flange 115 of the upper liquid-cooling substrate 11 form a sealing surface, which can be fixed by bolts, thereby eliminating the gluing process between the side beam frame and the upper liquid-cooling substrate, the process is simple, and there is no risk of leakage.

[0032] In addition, in the original structure, reference Figure 6Since the side beam frame 2 is located on the upper part of the upper liquid cooling base 11, the guard plate structure is composed of a guard plate beam body arranged in parallel, staggered, crossed, stacked or a combination thereof at the bottom of the lower liquid cooling base plate, and the guard plate beam body includes a guard plate vertical beam and a guard plate cross beam, and the guard plate vertical beam and the guard plate cross beam are arranged at the bottom of the lower liquid cooling base plate in a vertically staggered manner. In the utility model, the side beam frame 2 is surrounded on all sides of the bottom of the lower liquid cooling base plate 12, and the enclosed square frame itself plays a supporting role. Therefore, the number of guard plate beam bodies 31 is smaller, and there is no need to adopt a vertically staggered arrangement. Only a number of them need to be arranged in parallel. Due to the support of the side beam frame 2, the number of guard plate beams is significantly reduced, and there is no need to adopt a complex vertical staggered arrangement. This not only simplifies the production process, but also significantly reduces the material consumption, thereby effectively reducing the production cost of the enterprise; on the other hand, the volume of the tray assembly will become smaller, which not only makes the battery pack box more compact as a whole, reduces the space occupied in the vehicle or other application scenarios, but also helps to improve the energy density and overall performance of the battery pack; the smaller volume of the tray assembly also means that more space and resources can be saved during transportation and storage. At the same time, the lightweight tray assembly also helps to reduce the overall weight of the vehicle, thereby improving the vehicle's energy efficiency and range.

[0033] The second planar disc-shaped area 121 of the lower liquid-cooling substrate 12 is concave, and the disc edges around the lower liquid-cooling substrate 12 are horizontally folded to form flanges higher than the second planar disc-shaped area 121, that is, the second front flange 122, the second rear flange 123, the second left flange 124 and the second right flange 125 are higher than the second planar disc-shaped area 121. Considering the volume occupation and medium flow resistance, the second front flange 122 and the second planar disc-shaped area 121 are smoothly connected by the inclined surface 4, and the second rear flange 123, the second left flange 124 and the second right flange 125 are connected to the second planar disc-shaped area 121 through a vertical surface.

[0034] The lower liquid-cooling substrate 2 is provided with a liquid flow channel for the cooling medium to flow. The liquid flow channel includes a medium input end 13 and a medium output end 14 spaced apart on the second front flange 122, a medium inlet channel 15 and a medium return channel 16 connected to the medium input end 13 and the medium output end 14, and a medium flow channel 17 located in the second planar disc-shaped area 121 and connected to the medium inlet channel 15 and the medium return channel 16. The medium inlet channel 15 and the medium return channel 16 extend through the inclined surface 4 to the second planar disc-shaped area 121. When the upper and lower liquid-cooling substrates 11 and 12 are assembled and fixed, the first planar disc-shaped area 111 covers the surface of the second planar disc-shaped area 121, and the first flange covers the second flange, so that the liquid flow channel forms a closed flow channel system for the cooling medium to flow, and the liquid-cooling substrate effectively takes away the heat of the battery module through the circulation of the cooling medium therein.

[0035] The second front flange 122 is provided with a medium input end 13 and a medium output end 14, which is connected to the second planar disc-shaped area 121 by an inclined surface to achieve a smooth transition, which can significantly reduce the resistance of the cooling medium during the flow process. The other flanges are connected to the second planar disc-shaped area by a vertical surface, which effectively reduces the volume occupancy rate of the liquid-cooled substrate in the overall system and improves the space utilization rate. The medium input end 13 and the medium output end 14 are respectively connected to the liquid inlet pipe 5 and the liquid outlet pipe 6, which are arranged on the first front flange 112, and the structural space is also saved.

[0036] The lower liquid-cooling substrate 12 has the same structure as the upper liquid-cooling substrate except that the liquid flow channel is provided, and the two are closely attached to form a whole.

[0037] The angle between the inclined surface 4 and the second planar disc-shaped area 121 is controlled at 10-90°, and the connection between the inclined surface 4 and the second front flange 122 and between the inclined surface 4 and the second planar disc-shaped area 121 adopts a chamfer design with a radius R, wherein the radius R ranges from 3 to 20 mm.

[0038] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A battery pack tray assembly, comprising a liquid cooling base plate for cooling a battery module, and a side beam frame located around the bottom of the liquid cooling base plate, characterized in that: The liquid-cooling substrate comprises an upper liquid-cooling substrate located at the top and a lower liquid-cooling substrate attached to the bottom of the upper liquid-cooling substrate. The surface of the upper liquid-cooling substrate is recessed inward to form a first planar disc-shaped area for holding the battery module, and the disc edges around the upper liquid-cooling substrate are horizontally folded outward to form a first flange; the surface of the lower liquid-cooling substrate is recessed inward to form a second planar disc-shaped area attached to the first planar disc-shaped area, and the disc edges around the lower liquid-cooling substrate are horizontally folded outward to form a second flange attached to the first flange.

2. The battery pack tray assembly according to claim 1, characterized in that: The first flange formed by horizontally folding the disk edge around the upper liquid-cooling substrate outward includes a first front flange, a first rear flange, a first left flange and a first right flange along the four directions of the disk edge front, back, left and right. The disk edge around the lower liquid-cooling substrate is horizontally folded outward to form a second front flange, a second rear flange, a second left flange and a second right flange that fit therewith.

3. The battery pack tray assembly according to claim 2, characterized in that: The second front flange and the second planar disc-shaped area are smoothly connected via an inclined surface, and an angle between the inclined surface and the second planar disc-shaped area is 10-90 degrees.

4. The battery pack tray assembly according to claim 3, characterized in that: The connection between the inclined surface and the second flange and the connection between the inclined surface and the second flat disc-shaped area are both chamfered with a radius of R.

5. The battery pack tray assembly according to claim 4, characterized in that: The radius R ranges from 3 to 20 mm.

6. The battery pack tray assembly according to claim 2, characterized in that: The side beam frame is located at the bottom of the second front flange, the second rear flange, the second left flange and the second right flange of the lower liquid-cooled base plate, thereby enclosing a square frame.

7. The battery pack tray assembly according to claim 1, characterized in that: A guard plate structure is arranged at the bottom of the lower liquid cooling base plate, and the guard plate structure is composed of a guard plate beam body arranged parallel to the bottom of the lower liquid cooling base plate.

8. The battery pack tray assembly according to claim 2, characterized in that: The second rear flange, the second left flange and the second right flange are connected to the second planar disc-shaped area through a vertical surface.

Images