Sheet metal battery pack box body

Abstract

The utility model relates to the technical field of battery packs, in particular to a sheet metal battery pack box body which comprises a sheet metal box and hanging lugs, the top of the sheet metal box is open, and a plurality of hanging lugs are fixed on the side portion of the sheet metal box. The hanging lug comprises an upper sheet metal part and a lower sheet metal part, the upper sheet metal part is arranged at the top of the lower sheet metal part, and the upper sheet metal part and the lower sheet metal part are welded and fixed; the lower end of the upper sheet metal part is welded and fixed to the side portion of the sheet metal box. The lower end of the lower sheet metal part horizontally extends to the bottom of the sheet metal box and is welded and fixed, and the bottom surface of the lower end of the lower sheet metal part is horizontally aligned with the bottom surface of the sheet metal box; the hanging lug is composed of the upper sheet metal part and the lower sheet metal part, the upper layer and the lower layer of the hanging lug are designed, the structural strength is effectively improved, the hanging lug is not prone to deformation or breakage when being subjected to external impact or long-time vibration, and therefore the use safety performance of the battery pack is improved, and the service life of the battery pack is prolonged. The problem that safe use is affected due to the fact that hanging lugs on an existing battery pack metal plate box body are prone to deformation or breakage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a sheet metal battery pack box. Background Art

[0002] As a core component of electric vehicles, the battery pack's design and manufacturing are crucial to the overall vehicle's performance. In particular, the battery pack's mounting brackets—the lugs (or lifting lugs) on the sheet metal enclosure—are responsible for securely attaching the battery pack to the vehicle frame, ensuring stability and safety under various driving conditions.

[0003] Currently, most electric vehicle battery pack enclosures utilize a sheet metal design. The interior of the enclosure houses the battery modules, while the sides of the enclosure are equipped with several lugs for connecting to the vehicle body. These lugs are connected to the vehicle frame via bolts or other fasteners, securing the battery pack. For example, utility model publication (announcement) number CN207474545U discloses a sheet metal enclosure for battery packs with improved stress resistance, specifically mentioning the provision of lugs on the enclosure to enhance the connection strength between the battery pack and the vehicle frame.

[0004] As in the above-mentioned technical solution, although the existing battery pack sheet metal box hanging ear design can meet the basic fixing requirements to a certain extent, the hanging ears on the existing sheet metal box mostly adopt a single-piece structure design. This design is prone to deformation or even breakage when facing external impact or long-term vibration, resulting in failure of battery pack fixation and posing a safety hazard. Utility Model Content

[0005] In view of this, the utility model proposes a sheet metal battery pack case, whose hanging ears are composed of upper and lower sheet metal parts, realizing an upper and lower two-layer design of the hanging ears, effectively improving the structural strength, making the hanging ears not easily deformed or broken when facing external impact or long-term vibration, thereby improving the safety performance of the battery pack and solving the problem that the hanging ears on the existing battery pack sheet metal case are easily deformed or broken, affecting safe use.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] The utility model provides a sheet metal battery pack box, including a sheet metal box and hanging ears, wherein:

[0008] The top of the sheet metal box is open, and a plurality of the hanging ears are fixed to the side of the sheet metal box;

[0009] The hanging ear includes an upper sheet metal part and a lower sheet metal part, wherein:

[0010] The upper sheet metal part is arranged on the top of the lower sheet metal part, and the upper sheet metal part is welded and fixed to the lower sheet metal part;

[0011] The lower end of the upper sheet metal part is welded and fixed to the side of the sheet metal box;

[0012] The lower end of the lower sheet metal part horizontally extends to the bottom of the sheet metal box and is welded and fixed, and the bottom surface of the lower end of the lower sheet metal part is horizontally aligned with the bottom surface of the sheet metal box.

[0013] On the basis of the above technical solution, preferably, a sink is provided at the bottom of the sheet metal box and at a position corresponding to the lower end of the lower sheet metal part, wherein:

[0014] One end of the sink close to the lower sheet metal part is open;

[0015] The lower end of the lower sheet metal part is fixed on the bottom of the sink.

[0016] On the basis of the above technical solution, preferably, a positioning protrusion is provided on the bottom of the sink, and a positioning notch is provided at the lower end of the lower sheet metal, wherein,

[0017] The positioning protrusion is arranged in the positioning notch.

[0018] On the basis of the above technical solution, preferably, the upper sheet metal part is in a stepped shape, and the lower sheet metal part is in a "factory" shape, wherein,

[0019] The edges on both sides of the upper sheet metal are bent upward in an arc shape to form a first flange, and the edges on both sides of the lower sheet metal are bent vertically upward to form a second flange;

[0020] The upper sheet metal component is arranged between the second flanges on both sides, and the first flange and the second flange are welded and fixed.

[0021] On the basis of the above technical solution, preferably, the edges on both sides of the lower end of the upper sheet metal part extend horizontally to form a first flange, and the edge of the second flange close to one end of the sheet metal box extends horizontally to form a second flange, wherein,

[0022] The first flange is welded and fixed to the side of the sheet metal box;

[0023] The second flange is welded and fixed against the side end of the first flange.

[0024] On the basis of the above technical solution, preferably, a cavity is formed between the upper sheet metal and the lower sheet metal, a weight-reducing hole is provided on the side of the lower sheet metal, and a leakage hole is provided on the bottom of the lower sheet metal, wherein,

[0025] The weight-reducing hole is communicated with the cavity.

[0026] Based on the above technical solutions, preferably, reinforcing ribs are provided at the bending portions of the side and the top of the lower sheet metal part.

[0027] Based on the above technical solutions, preferably, the hanging ear further includes a sleeve, wherein,

[0028] A first through hole is vertically provided at one end of the lower sheet metal part away from the sheet metal box, and a second through hole is vertically provided at one end of the upper sheet metal part away from the sheet metal box. The second through hole and the first through hole are coaxially arranged.

[0029] The sleeve is arranged in the cavity, and one end of the sleeve is embedded and fixed in the first through hole, and the other end is fixedly connected to the bottom surface of the upper sheet metal part.

[0030] Based on the above technical solutions, preferably, a first convex protrusion in the shape of a "king" character is provided at the bottom of the sheet metal box, a second convex protrusion in the shape of a rectangle is provided at the side of the sheet metal box, and the edge of the opening end of the sheet metal box is vertically bent downward to form a third flanging.

[0031] Based on the above technical solutions, preferably, it further includes a crossbeam and a longitudinal beam, wherein,

[0032] The crossbeam and the longitudinal beam are welded at the edge of the inner bottom of the sheet metal box.

[0033] A sheet metal battery pack box of the present utility model has the following beneficial effects compared with the prior art:

[0034] (1) By providing that the hanging ear is composed of an upper sheet metal part and a lower sheet metal part, and the upper sheet metal part and the lower sheet metal part are welded and fixed, a two-layer design of the hanging ear is realized, effectively improving the structural strength of the hanging ear, making the hanging ear not easily deformed or broken when facing external impacts or long-term vibrations, thereby improving the use safety performance of the battery pack.

[0035] (2) By providing that the lower end of the lower sheet metal part horizontally extends to the bottom of the sheet metal box and is welded and fixed, the connection strength between the hanging ear and the sheet metal box is improved, and further the structural strength of the hanging ear is higher and the use of the battery pack is safer.

[0036] (3) By providing a sinking groove, a positioning protrusion and a positioning notch, it is convenient for quick positioning during the installation of the hanging ear, and the welding efficiency is improved.

[0037] (4) By bending the edges on both sides of the upper sheet metal upward in an arc shape to form a first flange, and bending the edges on both sides of the lower sheet metal vertically upward to form a second flange, it is convenient to enhance the anti-torsion ability of the upper and lower sheet metal parts, so that the hanging ears are not easily deformed. At the same time, by providing reinforcing ribs at the bending parts of the side and top of the lower sheet metal part, it is convenient to reinforce the lower sheet metal part, so that the hanging ears are more difficult to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a three-dimensional diagram of a sheet metal battery pack box of the present invention;

[0040] Figure 2 It is a partial three-dimensional diagram of the ear hook of the present invention;

[0041] Figure 3 It is a partial three-dimensional diagram of the sink of the utility model;

[0042] Figure 4 This is a schematic diagram of the internal structure of the mounting ear of the present invention;

[0043] Figure 5 This is an exploded view of the mounting ear of the utility model;

[0044] In the figure: 1. sheet metal box; 2. hanging ear; 3. horizontal and vertical beams; 11. first convex bump; 12. second convex bump; 13. third flange; 21. upper sheet metal part; 22. lower sheet metal part; 23. sleeve; 101. sink; 102. positioning protrusion; 201. cavity; 211. first flange; 212. first flange; 221. second flange; 222. second flange; 223. reinforcing rib; 2101. second through hole; 2201. positioning notch; 2202. weight-reducing hole; 2203. leakage hole; 2204. first through hole. DETAILED DESCRIPTION

[0045] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] As shown Figure 1-5 in the figure, a sheet metal battery pack box of the present utility model includes a sheet metal box 1 and hanging ears 2.

[0047] Among them, the sheet metal box 1 is integrally formed by stamping, and its interior is used to install battery modules. As Figure 1 shown in the figure, the sheet metal box 1 is a rectangular box, and its bottom is provided with a plurality of first convex bumps 11 in the shape of the Chinese character "Wang", and its side is provided with a plurality of second convex bumps 12 in the shape of a rectangle. Through this structure, the structural strength of the sheet metal box 1 is relatively high, which is beneficial to the protection of battery modules.

[0048] At the same time, a crossbeam 3 is also welded and fixed at the edge of the inner bottom of the sheet metal box 1. The top of the crossbeam 3 is used to fix the battery module. Through the crossbeam 3, not only is it convenient to install and fix the battery module, but also the structural strength of the sheet metal box 1 is higher, and the protection effect on the battery module is better.

[0049] In addition, the edge of the open end of the sheet metal box 1 is vertically bent downward to form a third flanging 13. The top surface of the third flanging 13 is flat to form an installation surface. This installation surface is used to install the upper cover. The edge of the upper cover is also provided with a flanging structure. Bolt mounting holes are provided on both the flanging structure and the third flanging 13 for installing bolts. The upper cover is fixed on the above-mentioned installation surface through bolts. Among them, the upper cover is not drawn in the figure.

[0050] As Figure 1 shown in the figure, the hanging ears 2 are welded to the side of the sheet metal box 1 and are used to connect to the vehicle frame. Figure 1 [[ID=ZI]]Among them, a plurality of hanging ears 2 are welded and fixed to the side of the sheet metal box 1. Each of the hanging ears 2 adopts a double-layer structure design to enhance the structural strength. Specifically, as Figure 2-5 [[ID=ZI]]shown in the figure, the hanging ear 2 includes an upper sheet metal part 21 and a lower sheet metal part 22.

[0051] Among them, the upper sheet metal part 21 is arranged on the top of the lower sheet metal part 22, and the upper sheet metal part 21 is welded and fixed to the lower sheet metal part 22. At the same time, the lower end of the upper sheet metal part 21 is welded and fixed to the side of the sheet metal box 1. Through this structure, the double-layer structure of the hanging ear 2 is realized, which can effectively enhance the structural strength of the hanging ear 2, making it not easy to deform or break when facing external impacts or long-term vibrations during use, thereby improving the use safety performance of the battery pack.

[0052] To make the use of the battery pack safer, as Figure 3 shown in the figure, the lower end of the lower sheet metal part 22 horizontally extends to the bottom of the sheet metal box 1 and is welded and fixed, and the bottom surface of the lower end of the lower sheet metal part 22 is horizontally aligned with the bottom surface of the sheet metal box 1. Through this structure, not only the connection strength between the hanging ear 2 and the sheet metal box 1 is enhanced, but also the structural strength of the hanging ear 2 is further improved, making the use of the battery pack safer.

[0053] like Figure 3 As shown, in order to achieve horizontal alignment of the bottom surface of the lower end of the lower sheet metal part 22 with the bottom surface of the sheet metal box 1, a sink 101 is provided at the bottom of the sheet metal box 1 and at a position corresponding to the lower end of the lower sheet metal part 22, wherein the sink 101 is open at one end close to the lower sheet metal part 22, and the lower end of the lower sheet metal part 22 enters the sink 101 from the open structure. After entering, the lower end of the lower sheet metal part 22 is fixed to the bottom of the sink 101 by welding.

[0054] At the same time, a positioning protrusion 102 is provided on the bottom of the sink 101, and a positioning notch 2201 is provided at the lower end of the lower sheet metal part 22, wherein the positioning protrusion 102 is arranged in the positioning notch 2201. This structure can achieve rapid positioning when the hanging ear 2 is installed, thereby improving welding efficiency.

[0055] In addition, in the structural design of the above-mentioned hanging ear 2, as Figure 5 As shown, the upper sheet metal part 21 is made into a stepped shape by sheet metal, and the lower sheet metal part 22 is made into a "factory" shape by sheet metal. Figure 2-4 The edges on both sides of the upper sheet metal 21 are bent upward in an arc shape to form a first flange 211, and the edges on both sides of the lower sheet metal 22 are bent vertically upward to form a second flange 221, wherein the upper sheet metal 21 is arranged between the second flanges 221 on both sides, and the edges of the first flange 211 and the second flange 221 are welded and fixed by welding.

[0056] At the same time, the edges on both sides of the lower end of the upper sheet metal part 21 extend horizontally to form a first flange 212, and the edges of the second flange 221 close to one end of the sheet metal box 1 extend horizontally to form a second flange 222. Shell-shaped reinforcement ribs 223 are provided at the bending parts of the side and top of the lower sheet metal part 22, wherein the first flange 212 is laid flat on the side of the sheet metal box 1 and welded and fixed, and the second flange 222 is laid flat and abuts against the side end of the first flange 212, and the second flange 222 and the edge of the first flange 212 are welded and fixed by welding.

[0057] Through the structural design of the above-mentioned hanging ear 2, the structural strength of the hanging ear 2 can be made higher, and the connection between the hanging ear 2 and the sheet metal box 1 can be made more firm and stable, thereby making the hanging ear 2 less likely to be deformed or broken due to external impact or long-term vibration during use.

[0058] After the upper sheet metal part 21 and the lower sheet metal part 22 are welded and formed, Figure 4As shown, a cavity 201 is formed between the upper sheet metal 21 and the lower sheet metal 22, and a weight-reducing hole 2202 is provided on the side of the lower sheet metal 22, and a leakage hole 2203 is provided at the bottom of the lower sheet metal 22, wherein the weight-reducing hole 2202 is communicated with the cavity 201 for discharging moisture and reducing weight, and the leakage hole 2203 is used to drain the water in the cavity 201.

[0059] like Figure 1 As shown, the upper end of the hanging ear 2 needs to be opened to install a bolt, which is used to fix the hanging ear 2 to the frame. In order to ensure the structural strength of the opening of the hanging ear 2, a sleeve 23 needs to be provided at the opening. Specifically, as shown Figure 4-5 As shown, a first through-hole 2204 is vertically defined along the upper edge of the end of the lower sheet metal member 22 remote from the sheet metal box 1, and a second through-hole 2101 is vertically defined along the upper edge of the end of the upper sheet metal member 21 remote from the sheet metal box 1. The second through-hole 2101 is coaxially arranged with the first through-hole 2204. A sleeve 23 is disposed within the cavity 201, with one end of the sleeve 23 embedded in and secured to the first through-hole 2204 and the other end fixedly connected to the bottom surface of the upper sheet metal member 21. The sleeve 23 supports the upper sheet metal member 21, effectively ensuring the structural strength of the opening of the mounting lug 2.

[0060] In the above structure, the first through hole 2204, the sleeve 23 and the inner side of the first through hole 2204 form a bolt installation channel, through which a bolt is installed, and then the hanging ear 2 is fixed to the frame by the bolt.

[0061] The method of using the sheet metal battery pack box of the utility model is as follows:

[0062] When installing the battery module, place the battery module flat on the transverse and longitudinal beams 3, and then use bolts to fix the battery module to the transverse and longitudinal beams 3. When installing the sheet metal box 1, fix the lug 2 to the frame with bolts. During the process, the bolt passes through the second through hole 2101, the sleeve 23, and the first through hole 2204 in sequence, and then the bolt is screwed to the frame and tightened.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sheet metal battery pack box, comprising a sheet metal box (1) and a hanging ear (2), wherein: The top of the sheet metal box (1) is open, and a plurality of the hanging ears (2) are fixed to the side of the sheet metal box (1); The feature is that the hanging ear (2) comprises an upper sheet metal part (21) and a lower sheet metal part (22), wherein: The upper sheet metal part (21) is arranged on the top of the lower sheet metal part (22), and the upper sheet metal part (21) and the lower sheet metal part (22) are welded and fixed; The lower end of the upper sheet metal part (21) is welded and fixed to the side of the sheet metal box (1); The lower end of the lower sheet metal part (22) extends horizontally to the bottom of the sheet metal box (1) and is welded and fixed, and the bottom surface of the lower end of the lower sheet metal part (22) is horizontally aligned with the bottom surface of the sheet metal box (1).

2. The sheet metal battery pack box according to claim 1, characterized in that: A sink (101) is provided at the bottom of the sheet metal box (1) and at a position corresponding to the lower end of the lower sheet metal part (22), wherein: One end of the sink (101) close to the lower sheet metal part (22) is open; The lower end of the lower sheet metal part (22) is fixed on the bottom of the sink (101).

3. The sheet metal battery pack box according to claim 2, characterized in that: A positioning protrusion (102) is provided on the bottom of the sink (101), and a positioning notch (2201) is provided at the lower end of the lower sheet metal part (22), wherein: The positioning protrusion (102) is arranged in the positioning notch (2201).

4. The sheet metal battery pack box according to claim 1, characterized in that: The upper sheet metal part (21) is in a stepped shape, and the lower sheet metal part (22) is in a "factory" shape, wherein: The edges on both sides of the upper sheet metal part (21) are bent upward in an arc shape to form a first flange (211), and the edges on both sides of the lower sheet metal part (22) are bent vertically upward to form a second flange (221); The upper sheet metal part (21) is arranged between the second flanges (221) on both sides, and the first flange (211) and the second flange (221) are welded and fixed.

5. The sheet metal battery pack box according to claim 4, characterized in that: The edges on both sides of the lower end of the upper sheet metal part (21) extend horizontally to form a first flange (212), and the edge of the second flange (221) close to one end of the sheet metal box (1) extends horizontally to form a second flange (222), wherein: The first flange (212) is welded and fixed to the side of the sheet metal box (1); The second flange (222) abuts against the side end of the first flange (212) and is welded and fixed.

6. The sheet metal battery pack box according to claim 4, characterized in that: A cavity (201) is formed between the upper sheet metal part (21) and the lower sheet metal part (22), a weight-reducing hole (2202) is provided on the side of the lower sheet metal part (22), and a liquid leakage hole (2203) is provided on the bottom of the lower sheet metal part (22), wherein: The weight-reducing hole (2202) is in communication with the cavity (201).

7. The sheet metal battery pack box according to claim 6, characterized in that: Reinforcing ribs (223) are provided at the bending positions of the side and top of the lower sheet metal part (22).

8. The sheet metal battery pack box according to claim 7, characterized in that: The hanging ear (2) further includes a sleeve (23), wherein: A first through hole (2204) is vertically provided at one end of the lower sheet metal part (22) away from the sheet metal box (1), and a second through hole (2101) is vertically provided at one end of the upper sheet metal part (21) away from the sheet metal box (1). The second through hole (2101) is coaxially arranged with the first through hole (2204). The sleeve (23) is arranged in the cavity (201), and one end of the sleeve (23) is embedded and fixed in the first through hole (2204), and the other end is fixedly connected to the bottom surface of the upper sheet metal part (21).

9. The sheet metal battery pack box according to claim 1, characterized in that: A first convex protrusion (11) in the shape of the Chinese character "king" is provided at the bottom of the sheet metal box (1), a second convex protrusion (12) in the shape of a rectangle is provided at the side of the sheet metal box (1), and the edge of the open end of the sheet metal box (1) is vertically bent downward to form a third flanging (13).

10. The sheet metal battery pack box according to claim 1, characterized in that: It further includes a cross-longitudinal beam (3), wherein, The cross-longitudinal beam (3) is welded at the edge of the inner bottom of the sheet metal box (1).

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