Battery box body structure

Abstract

The utility model provides a battery box structure which comprises a box frame, a liquid cooling plate and a bottom guard plate, the box frame comprises an edge beam and an inner beam, a sinking table is arranged on the inner side of the bottom of the edge beam, the liquid cooling plate is arranged on the sinking table and is connected with the edge beam in a welded mode, the liquid cooling plate is connected with the inner beam through a plurality of FDSs, and the bottom guard plate is arranged on the bottom guard plate. The edge of the bottom protection plate is fixedly connected with the edge beam through a fixing piece. The boundary beam and the liquid cooling plate are connected through brazing, a large sealing ring which is a quick-wear part is removed, air tightness can be guaranteed, the liquid cooling plate only needs a small amount of FDS, and compared with the prior art, the usage amount of the FDS is reduced by 90%, price is reduced, and weight is reduced. And as the side beam is provided with the sinking platform, the bottom guard plate saves the avoidance stamping space, the structure is relatively simple, and the installation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of battery boxes, in particular to a battery box structure. Background Art

[0002] There are two types of existing bottom liquid-cooled battery case structures. One is profile liquid cooling, that is, the liquid cooling chamber and the battery case profile side beam are integrally formed. The advantages are that it is not easy to leak and there are fewer molding process steps. The disadvantages are high mold cost, long cycle, and insufficient strength. The other is to use a brazed stamped cold plate. A large sealing ring is set between the brazed stamped cold plate and the profile side beam of the battery case. The brazed stamped cold plate and the profile side beam are connected with FDS (flow drill screws). The bottom guard plate is assembled with the battery case by bolts. The advantages are low cost, short cycle, and high strength. The disadvantages are that the large sealing ring is easily damaged and difficult to install. There are too many bolts and FDS, which is heavy and takes a long time to assemble. The cold plate and bottom guard plate structure are more complicated. For example, the Chinese invention patent application with application publication number CN117691277A uses a brazed stamped cold plate, which also has the above-mentioned problems. Utility Model Content

[0003] The purpose of this utility model is to address the defects of the existing technology and provide a battery box structure with good airtightness, less FDS usage, lower price and reduced weight; the bottom guard plate saves space for avoidance stamping, has a relatively simple structure and is easy to install.

[0004] In order to solve the above technical problems, the utility model provides a battery box structure, including a box frame, a liquid cooling plate, and a bottom guard plate. The box frame includes side beams and inner beams. A sinking platform is provided on the inner side of the bottom of the side beam. The liquid cooling plate is arranged on the sinking platform and is connected to the side beam by welding. The liquid cooling plate and the inner beam are connected by multiple FDSs, and the edge of the bottom guard plate is fixedly connected to the side beam by fixing parts.

[0005] Furthermore, the height of the sink is equal to the thickness of the liquid cooling plate.

[0006] Furthermore, the inner beam and the side beam are fixedly connected by welding.

[0007] Furthermore, a plurality of threaded holes are provided at the bottom of the inner beam, and the bottom guard plate is fixedly connected to the inner beam via a plurality of bolts, one end of the bolts being threadedly connected to the threaded holes.

[0008] Furthermore, a plurality of avoidance holes are provided on the liquid cooling plate, and the plurality of avoidance holes correspond one-to-one to the plurality of threaded holes.

[0009] Furthermore, a sealing ring is sleeved on the bolt, and the sealing ring is arranged between the liquid cooling plate and the inner beam.

[0010] Furthermore, the inner beam includes a cross beam and a longitudinal beam arranged perpendicular to each other, and the threaded hole is opened on the cross beam.

[0011] Furthermore, a buffer pad is included, and the buffer pad is arranged between the bottom guard plate and the liquid cooling plate.

[0012] The beneficial effects of the utility model are:

[0013] 1. The side beam of the utility model is connected to the liquid cooling plate by brazing or other methods, eliminating the large sealing ring which is a vulnerable part, and the air tightness can be guaranteed.

[0014] 2. The liquid cooling plate of the utility model only needs to use a small amount of FDS. Compared with the existing technology, the amount of FDS used is reduced by 90%, which reduces the price and weight.

[0015] 3. Since the side beams of the present invention are provided with sunken platforms, the bottom guard plate saves space for avoiding stamping, and the structure is relatively simple and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the utility model;

[0017] Figure 2 It is a structural diagram of the box frame of the utility model.

[0018] Figure numerals: 1-box frame; 2-side beam; 3-inner beam; 4-liquid cooling plate; 5-sink; 6-threaded hole; 7-bottom guard plate; 8-avoidance hole; 9-sealing ring. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0020] like Figure 1 As shown, this embodiment provides a battery box structure of the present invention, including a box frame 1, a liquid cooling plate 4, and a bottom protective plate 7.

[0021] like Figure 2 As shown, the box frame 1 includes side beams 2 and inner beams 3. The inner beams 3 include multiple horizontal beams and longitudinal beams arranged perpendicular to each other. Both ends of the horizontal beams and longitudinal beams are fixedly connected to the side beams 2. A sinking platform 5 is provided on the inner side of the bottom of the side beam 2, and a threaded hole 6 is provided on the bottom end face of the horizontal beam. A sealing ring 9 is provided on the threaded hole 6.

[0022] like Figure 1As shown, the liquid cooling plate 4 is placed on the sink 5 and connected to the side beams 2 by welding. Specifically, the entire edge of the liquid cooling plate 4 is brazed to the side beams 2, ensuring a tight seal between the liquid cooling plate 4 and the side beams 2. This eliminates the need for large sealing rings 9 between the side beams 2 and the liquid cooling plate 4. The liquid cooling plate 4 is fixedly connected to the inner beam 3 via multiple FDSs. Multiple escape holes 8 are provided in the liquid cooling plate 4, corresponding one-to-one with the threaded holes 6. The escape holes 8 should not interfere with the internal flow path of the liquid cooling plate 4.

[0023] like Figure 1 As shown, the edge of the bottom guard plate 7 is fixedly connected to the side beam 2 by bolts, and the bottom guard plate 7 is fixedly connected to the cross beam by multiple bolts. One end of the bolt passes through the bottom guard plate 7, the avoidance hole 8, the sealing ring 9 and is threadedly connected to the threaded hole 6.

[0024] In this embodiment, the height of the sink 5 is equal to the thickness of the liquid cooling plate 4, so that the bottom of the liquid cooling plate 4 is flush with the bottom of the side beam 2, which saves the stamping space for the bottom guard plate 7, makes the structure simpler, and facilitates installation.

[0025] The battery box structure of this embodiment also includes a buffer pad, which is arranged between the bottom guard plate 7 and the liquid cooling plate 4. Figure 1 Not indicated.

[0026] In this embodiment, a sinking platform 5 is provided at the bottom of the side beam 2, thereby eliminating the large sealing ring 9, a vulnerable part, so that the airtightness between the side beam 2 and the liquid cooling plate 4 is ensured. The structure is simple and easy to install, the weight of the bolts is reduced by half, the structure of the bottom guard plate 7 is also simple, and the overall strength is further enhanced.

[0027] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A battery box structure, characterized in that: The invention comprises a box frame (1), a liquid cooling plate (4), and a bottom guard plate (7); the box frame (1) comprises a side beam (2) and an inner beam (3); a sinking platform (5) is provided on the inner side of the bottom of the side beam (2); the liquid cooling plate (4) is arranged on the sinking platform (5) and is connected to the side beam (2) by welding; the liquid cooling plate (4) and the inner beam (3) are connected by a plurality of FDS; and the edge of the bottom guard plate (7) is fixedly connected to the side beam (2) by a fixing piece.

2. The battery box structure according to claim 1, characterized in that: The height of the sink (5) is equal to the thickness of the liquid cooling plate (4).

3. The battery box structure according to claim 1 or 2, characterized in that: The inner beam (3) and the side beam (2) are fixedly connected by welding.

4. The battery box structure according to claim 3, characterized in that: A plurality of threaded holes (6) are provided at the bottom of the inner beam (3); the bottom guard plate (7) is fixedly connected to the inner beam (3) via a plurality of bolts, one end of the bolt being threadedly connected to the threaded hole (6).

5. The battery box structure according to claim 4, characterized in that: A plurality of avoidance holes (8) are provided on the liquid cooling plate (4), and the plurality of avoidance holes (8) correspond one-to-one to the plurality of threaded holes (6).

6. The battery box structure according to claim 5, characterized in that: A sealing ring (9) is sleeved on the bolt, and the sealing ring (9) is arranged between the liquid cooling plate (4) and the inner beam (3).

7. The battery box structure according to claim 4, characterized in that: The inner beam (3) comprises a cross beam and a longitudinal beam arranged perpendicular to each other, and the threaded hole (6) is provided on the cross beam.

8. The battery box structure according to claim 1, characterized in that: A buffer pad is included, and the buffer pad is arranged between the bottom guard plate (7) and the liquid cooling plate (4).

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