Power battery box

Abstract

The utility model discloses a power battery box body, which belongs to the technical field of power battery structures and comprises a frame structure, a box cover component, a bottom plate component and a truss structure. The lower surface of the bottom plate component is provided with the truss structure composed of the first rectangular pipe fittings, namely the truss structure composed of the bottom rectangular square pipes is adopted, so that the weight is reduced, the cost is reduced, and meanwhile the overall strength and rigidity of the battery pack are improved.

Description

Technical Field

[0001] This utility model belongs to the field of power battery structure technology, specifically relating to a power battery housing. Background Technology

[0002] With the rapid development of electric vehicles and renewable energy storage, power battery systems are now widely used in electric vehicles (EVs), hybrid electric vehicles (PHEVs), and energy storage systems (ESS). Automakers and users are increasingly demanding higher performance from power batteries. The battery housing, as a crucial component of the battery pack, plays a vital role. However, existing power battery housing designs are often customized due to limitations imposed by different vehicle models and factors affecting driving range. The power battery housing needs to balance both strength and weight requirements. In electric vehicles (BEVs) and energy storage systems, lightweighting is crucial for improving energy efficiency and driving range. However, lightweighting usually means sacrificing some strength or safety. Therefore, a battery housing design that balances lightweighting and safety is particularly important. Utility Model Content

[0003] The purpose of this utility model is to provide a power battery housing to solve the problem mentioned in the background art that it is difficult to simultaneously achieve both lightweight and safety in existing battery housings.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power battery housing, comprising:

[0005] A frame structure and a lid assembly fitted on top of the frame structure;

[0006] The base plate component is fixed to the bottom of the frame structure;

[0007] The quilting structure includes a plurality of first rectangular tubes spaced apart in a first direction. The first rectangular tubes are fixed to the lower surface of the base plate component and extend along a second direction.

[0008] By designing a quilting structure composed of multiple first rectangular tubes on the lower surface of the base plate component, that is, using a quilting structure composed of bottom rectangular square tubes to reduce weight and cost, the overall strength and rigidity of the battery pack are improved.

[0009] Furthermore, the quilting structure also includes at least one second rectangular tube, which extends along a first direction and is connected to the base plate component and the first rectangular tube.

[0010] Furthermore, the quilting structure includes at least one set of modal units, which are configured as a "rice" shaped structure formed by splicing together two third rectangular tubes, three first rectangular tubes arranged sequentially in a first direction, and a single second rectangular tube.

[0011] Through the design of the "rice-shaped" modal unit, the strength of the battery box can be improved while the modal of the battery pack is enhanced.

[0012] Furthermore, the frame structure includes two side frames spaced apart in the second direction. The battery box further includes two sets of strengthening components, which are respectively assembled on the two side frames and are symmetrically arranged in the second direction. And a single set of strengthening components includes multiple lug strengthening members spaced apart in the first direction.

[0013] Through the design of the strengthening components, the strength of the lug position of the battery box can be improved. At the same time, based on the symmetrical design, it can ensure that the power battery pack does not shake due to the offset of the center of gravity during transportation and hoisting, and avoid structural deformation or damage of the power battery box caused by stress concentration during the hoisting process.

[0014] Furthermore, the lug strengthening member includes:

[0015] A first strengthening part, having a first end fixed to the outer wall surface of the side frame and a second end extending in the second direction;

[0016] A second strengthening part, extending from the second end of the first strengthening part in the third direction, and the outer wall surface of the second strengthening part constitutes the mounting surface of the lug.

[0017] Furthermore, the battery box further includes a lining member, the lining member is spaced apart from the bottom plate member in the third direction, and the edge of the lining member is connected to the inner wall surface of the frame structure.

[0018] Furthermore, the battery box further includes a plurality of first cross beams fixed to the bottom surface of the lining member. The plurality of first cross beams are spaced apart in the first direction, a single first cross beam extends in the second direction, and the bottom surface of the first cross beam contacts the upper surface of the bottom plate member.

[0019] By adding a lining member, a sealed protection cavity is formed between the lining member and the bottom plate member, which plays a role in protecting against extrusion deformation.

[0020] Furthermore, the cross section of the first cross beam is in a "U" shape.

[0021] Furthermore, the battery box further includes a plurality of second cross beams fixed to the upper surface of the lining member. The plurality of second cross beams are spaced apart in the first direction, and a single second cross beam extends in the second direction.

[0022] Furthermore, a sealing member is provided at the connection position between the box cover member and the frame structure. Description of the Drawings

[0023] Figure 1 is an exploded view of the battery box;

[0024] Figure 2 is a front view of the battery box;

[0025] Figure 3 is Figure 2 is an enlarged view of a part A in the middle;

[0026] Figure 4 is a bottom view of the battery box.

[0027] in the figure:

[0028] 100, frame structure; 101, front frame; 102, rear frame; 103, side frame; 104, sealing member; 105, box cover member;

[0029] 200, bottom plate member; 201, lining plate member; 202, first cross beam; 203, second cross beam;

[0030] 300, lifting lug reinforcing member; 300a, first reinforcing portion; 300b, second reinforcing portion; 301, lifting lug;

[0031] 400, quilt rack structure; 401, first rectangular pipe; 402, second rectangular pipe; 403, third rectangular pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Referring to Figure 1 The length direction of the power battery box is taken as the first direction, the width direction of the power battery box is taken as the second direction, and the height direction of the power battery box is taken as the third direction, and in the subsequent description, the top, low, upper and lower descriptions are all based on the third direction.

[0034] A power battery box, referring to Figure 1, including a frame structure 100, a bottom plate member 200, a quilt frame structure 400 and a reinforcing structure, wherein the frame structure 100 includes a front frame 101 and a rear frame 102 arranged at intervals in a first direction and two side frames 103 arranged at intervals in a second direction, the front frame 101, the rear frame 102 and the two side frames 103 are welded to form a frame structure 100 approximately rectangular, and the bottom plate member 200 is formed as a rectangular plate body extending in the first direction and the second direction, and the bottom plate member 200 is connected to the bottom of the frame structure 100 (one end in the third direction), specifically, the periphery of the bottom plate member 200 is welded to the bottom of the front frame 101, the rear frame 102 and the two side frames 103, and the box cover member 105 is assembled on the top of the frame structure 100, and the frame structure 100, the bottom plate member 200 and the box cover member 105 together define a space for accommodating the power battery, in some examples, the box cover member 105 is made of RTM material, and the upper surface of the box cover member 105 is provided with a rib pattern, and the edge is provided with a flange, which can reduce stress concentration while ensuring sealing and light weight, in some embodiments, the connection position of the frame structure 100 and the box cover member 105 is provided with a sealing member 104, that is, the sealing member 104 is arranged along the upper edge of the frame structure 100, and the sealing member 104 is made of foamed silica gel material, and a plurality of through holes are formed in the sealing member 104 to improve the pressure resistance and recovery of the sealing member 104, and ensure the sealing of the connection between the frame structure 100 and the box cover structure.

[0035] In some embodiments, a plurality of rivet nut columns are arranged through the upper surface of the bottom plate member 200, and the bottom surface of the bottom plate member 200 is coated with dense PVC material.

[0036] Referring to Figure 1 The reinforcing structure includes two groups of reinforcing components, which are respectively assembled on the two side frames 103 and are arranged in mirror symmetry in the second direction to ensure that the power battery pack does not shake due to the shift of the center of gravity during transportation and hoisting, and to avoid structural deformation or damage of the power battery box caused by stress concentration during hoisting, specifically, the reinforcing component includes a plurality of lifting lug reinforcing members 300 arranged at intervals in the first direction, in some embodiments, the lifting lug reinforcing member 300 includes a first reinforcing part 300a and a second reinforcing part 300b, wherein the first reinforcing part 300a has a first end welded to the outer wall surface of the side frame 103 (the wall surface of one end away from the inside of the box in the second direction) and a second end extending in the second direction, and the second reinforcing part 300b is formed by the second end of the first reinforcing part 300a extending in the third direction, that is, the lifting lug reinforcing member 300 is approximately formed as an "L" shaped component, and the outer wall surface of the second reinforcing part 300b is formed as a mounting surface of the lifting lug 301.

[0037] Referring to Figure 4 , the above-mentioned truss structure 400 includes a plurality of first rectangular pipe fittings 401. The plurality of first rectangular pipe fittings 401 are spaced in the first direction, and a single first rectangular pipe fitting 401 is fixed to the bottom surface of the bottom plate member 200 and extends along the second direction to improve the battery pack mode. In some embodiments, both ends of the first rectangular pipe fitting 401 extend to the positions of the first side frame 103 and the second side frame 103 respectively, and are welded to the first side frame 103 and the second side frame 103. In other embodiments, the first rectangular pipe fitting 401 extends to the bottom surface of the lug reinforcement 300 and is welded to the lug reinforcement 300. Based on this design, the stress-bearing area between the lug and the side frame 103 can be increased, avoiding stress concentration and ensuring that the lug does not break and fail during the subsequent Design Verification (DV) test. Continuing to refer to Figure 4 , the above-mentioned truss structure 400 further includes at least one second rectangular pipe fitting extending in the first direction, and the second rectangular pipe fitting 402 is welded to the lower surface of the bottom plate member 200 and the first rectangular pipe fitting 401. Specifically, while extending in the first direction, the second rectangular pipe fitting 402 is truncated at the position of the first rectangular pipe fitting 401 and is welded to the first rectangular pipe fitting 401 to form the truss structure 400.

[0038] Referring to Figure 4 , in some embodiments, the above-mentioned truss structure 400 further includes a third rectangular pipe fitting 403, and the third rectangular pipe fitting 403 is designed to extend obliquely on the lower surface of the bottom plate member 200. Specifically, the above-mentioned truss structure 400 includes at least one set of modal units, and each modal unit is composed of two third rectangular pipe fittings 403, three first rectangular pipe fittings 401 arranged in sequence in the first direction, and a single second rectangular pipe fitting 402, and they are jointly spliced to form a "cross" structure.

[0039] Referring to Figure 2 and Figure 3 , the above-mentioned battery box body further includes a lining plate member 201. The lining plate member 201 is spaced from the bottom plate member 200 in the third direction, and the edge of the lining plate member 201 is welded to the inner wall surface of the frame structure 100 to define a protective cavity between the bottom plate member 200 and the lining plate member 201, playing a protective role against extrusion deformation. In some embodiments, a plurality of first cross beams 202 are welded to the bottom surface of the lining plate member 201. Exemplarily, the cross section of the above-mentioned first cross beam 202 is in a "channel" shape. The plurality of first cross beams 202 are spaced in the first direction, and a single first cross beam 202 extends along the second direction. At the same time, the bottom surface of the first cross beam 202 contacts the bottom plate member 200. By arranging the first cross beam 202 in the protective cavity, the anti-extrusion deformation ability of the battery box body can be further improved.

[0040] In some embodiments, the battery pack case further comprises a plurality of second cross beams 203 fixed to the upper surface of the lining plate member 201, the plurality of second cross beams 203 are arranged at intervals in the first direction, and a single second cross beam 203 extends in the second direction, and exemplarily, the cross section of the second cross beam 203 is in the shape of "convex", so as to improve the rigidity and modal of the battery pack case.

[0041] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A power battery box, characterized in that, Comprising: A frame structure (100) and a cover member (105) assembled on top of the frame structure (100); A bottom plate member (200), fixed to the bottom of the frame structure (100); A truss structure (400), including a plurality of first rectangular pipe fittings (401) spaced in a first direction, the first rectangular pipe fittings (401) being fixed to the lower surface of the bottom plate member (200) and extending in a second direction.

2. The power battery box according to claim 1, characterized in that: The truss structure (400) further includes at least one second rectangular pipe fitting (402), the second rectangular pipe fitting (402) extending in the first direction and connected to the bottom plate member (200) and the first rectangular pipe fittings (401).

3. The power battery box according to claim 2, characterized in that: The truss structure (400) further includes at least two third rectangular pipe fittings (403) fixed to the lower surface of the bottom plate member (200), the truss structure (400) including at least one set of modal units, the modal units being configured as a "rice" - shaped structure formed by splicing two third rectangular pipe fittings (403), three first rectangular pipe fittings (401) arranged sequentially in the first direction, and a single second rectangular pipe fitting (402).

4. The power battery box according to claim 1, characterized in that: The frame structure (100) includes two side frames (103) spaced in a second direction, the battery box body further including two sets of strengthening components, the two sets of strengthening components being respectively assembled on the two side frames ( 5. The power battery box according to claim 4, characterized in that: ​ ​ ​ 6. The power battery box according to claim 1, characterized in that: ​ 7. The power battery box according to claim 6, characterized in that: ​ 8. The power battery box according to claim 7, characterized in that: ​ 9. The power battery box according to claim 6, characterized in that: ​ 10. The power battery box according to claim 9, characterized in that: ​

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