Battery pack beam structure and battery pack thereof

Abstract

The utility model discloses a battery pack beam structure and a battery pack thereof, the battery pack beam structure comprises a middle cross beam structure and a middle longitudinal beam structure, and the middle cross beam structure and the middle longitudinal beam structure are intersected to form a mounting space for mounting a battery pack; the middle cross beam structure and the middle longitudinal beam structure are both of a hollow structure, a first supporting structure and a second supporting structure are fixedly arranged in the middle cross beam structure and the middle longitudinal beam structure respectively, and each of the first supporting structure and the second supporting structure at least comprises a single Z-shaped supporting frame. According to the utility model, at least one single Z-shaped support frame is arranged in the hollow middle cross beam structure and the middle longitudinal beam structure, so that the energy density of the battery pack is improved; on one hand, the weight of the whole battery pack box body can be reduced through the hollow structural form, and on the other hand, the whole battery pack box body has better structural strength through the arrangement of the Z-shaped support frame.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack frame structure field, concretely relates to a kind of battery pack beam structure and its battery pack. BACKGROUND

[0002] The beam structure of existing roll-pressing battery pack box body structure is usually designed using the structure of the day-shaped and the eye-shaped, which leads to the overall weight of the battery pack box body being relatively heavy, which will inevitably affect the final range, and in the limited space of the beam structure, due to the overall weight of the battery pack box body being relatively heavy, the energy density of the battery pack is also difficult to increase.

[0003] Therefore, it is urgent to propose a new scheme to solve the above problems. SUMMARY

[0004] The utility model provides a kind of battery pack beam structure and its battery pack, can solve the problem that the beam structure in the existing battery pack box body uses the structure of the day-shaped and the eye-shaped, leading to the overall weight of the battery pack box body being relatively heavy.

[0005] The utility model provides a kind of battery pack beam structure, including intermediate crossbeam structure and intermediate longitudinal beam structure, the intermediate crossbeam structure and intermediate longitudinal beam structure intersect to form installation space to install battery pack;

[0006] The intermediate crossbeam structure and intermediate longitudinal beam structure are hollow structure, first support structure and second support structure are respectively fixedly arranged in the intermediate crossbeam structure and intermediate longitudinal beam structure, and the first support structure and the second support structure each include at least a single Z-shaped support frame.

[0007] Further, the intermediate crossbeam structure and intermediate longitudinal beam structure are each first U-shaped frame structure provided with an opening at the upper end.

[0008] Further, the Z-shaped support frame includes first flat portion and second flat portion respectively arranged at the upper and lower ends of the intermediate crossbeam structure or the intermediate longitudinal beam structure, and an oblique line portion arranged obliquely for connecting the first flat portion and the second flat portion, wherein the first flat portion is located at the opening of the first U-shaped frame structure, and the second flat portion is located at the bottom of the first U-shaped frame structure.

[0009] Further, the first flat portion is a second U-shaped frame structure, the second U-shaped frame structure includes first flat section, second flat section and third flat section connected in sequence, the first flat section and the third flat section are fixedly arranged in the inner wall of the upper end of the first U-shaped frame structure, and the second flat section protrudes upward from the upper end of the first U-shaped frame structure.

[0010] Further, the second flat section comprises a fourth flat section and a fifth flat section connected in sequence by bending, and the fourth flat section and the fifth flat section are fixedly arranged on the inner wall of the bottom of the first U-shaped frame structure.

[0011] Further, the width of the second support structure is greater than the width of the first support structure, the first support structure comprises a single Z-shaped support frame, and the second support structure comprises two Z-shaped support frames arranged symmetrically left and right along the center line of the first U-shaped frame structure.

[0012] Further, the lower end of the intermediate cross beam structure is provided with a first notch matched with the intermediate longitudinal beam structure, and the upper end of the intermediate longitudinal beam structure is provided with a second notch matched with the first notch, and the matching positions of the intermediate cross beam structure and the intermediate longitudinal beam structure are fixedly connected by welding.

[0013] Further, the connecting structure comprises a connecting plate and a locking piece, and the first support structure, the second support structure and the connecting plate are all provided with an opening through which the locking piece passes.

[0014] Further, the first flat section, the third flat section, the fourth flat section and the fifth flat section of the Z-shaped support frame are fixedly arranged on the inner wall of the first U-shaped frame structure by laser welding.

[0015] The utility model also provides a battery pack comprising the above battery pack beam structure.

[0016] Compared with the prior art, at least a single Z-shaped support frame is arranged in the hollow intermediate cross beam structure and the hollow intermediate longitudinal beam structure, on the one hand, the overall weight of the battery pack box body can be reduced by the hollow structure, thereby improving the energy density of the battery pack, and on the other hand, the overall structure strength of the battery pack box body is improved by arranging the Z-shaped support frame. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a battery pack box body structure schematic view of the utility model;

[0018] Figure 2 It is Figure 1 It is a structure enlarged schematic view of A place in the middle;

[0019] Figure 3 It is a whole structure schematic view of the intermediate cross beam structure in the utility model;

[0020] Figure 4 It is a transverse sectional view of the intermediate cross beam structure in the utility model;

[0021] Figure 5 It is a whole structure schematic view of the intermediate longitudinal beam structure in the utility model;

[0022] Figure 6 It is a transverse section view of the intermediate longitudinal beam structure of the utility model;

[0023] Fig. 1, intermediate cross beam structure; 11, first gap; 2, intermediate longitudinal beam structure; 21, second gap; 3, connecting structure; 31, connecting plate; 4, first support structure; 5, second support structure; 6, Z-shaped support frame; 61, first flat section; 611, first flat section; 612, second flat section; 613, third flat section; 62, second flat section; 621, fourth flat section; 622, fifth flat section; 63, diagonal section. DETAILED DESCRIPTION

[0024] In order to further understand the utility model content, characteristics and effects of the utility model, the following examples are given, and the accompanying drawings are combined Figures 1-6 The specific embodiments are described as follows.

[0025] As Figures 1-6 shown, the embodiment provides a battery pack beam structure, which comprises intermediate cross beam structure 1 and intermediate longitudinal beam structure 2, the intermediate cross beam structure 1 and the intermediate longitudinal beam structure 2 intersect to form a mounting space for mounting a battery pack, and the two ends of the intermediate cross beam structure 1 and the intermediate longitudinal beam structure 2 are fixedly arranged on the inner wall of the battery pack box body, wherein the intermediate cross beam structure 1 is two, arranged along the transverse direction of the battery pack, and the intermediate longitudinal beam structure 2 is single, arranged along the longitudinal direction of the battery pack.

[0026] The intermediate cross beam structure 1 and the intermediate longitudinal beam structure 2 are both hollow structures, the first support structure 4 and the second support structure 5 are fixedly arranged in the intermediate cross beam structure 1 and the intermediate longitudinal beam structure 2 respectively, and the first support structure 4 and the second support structure 5 both comprise at least a single Z-shaped support frame 6.

[0027] Compared with the prior art, at least a single Z-shaped support frame is arranged in the hollow intermediate cross beam structure and the intermediate longitudinal beam structure, on the one hand, the hollow structure can reduce the weight of the battery pack box body as a whole, thereby improving the energy density of the battery pack, and on the other hand, the Z-shaped support frame can improve the structural strength of the battery pack box body as a whole.

[0028] In the embodiment, as Figure 4 and 6 shown, the intermediate cross beam structure 1 and the intermediate longitudinal beam structure 2 are both first U-shaped frame structures provided with openings at the upper ends, wherein the bottom surface of the first U-shaped frame structure abuts against the inner bottom surface of the battery box, and the left and right ends of the first U-shaped frame structure are fixedly connected with the inner wall of the battery pack box body by laser welding.

[0029] In the embodiment, as Figure 4As shown, the Z-shaped support frame 6 includes a first flat section 61 and a second flat section 62 respectively arranged at the upper and lower ends of the intermediate beam structure 1 or the intermediate longitudinal beam structure 2, and an obliquely arranged diagonal section 63 for connecting the first flat section 61 and the second flat section 62, wherein the first flat section 61 is located at the opening of the first U-shaped frame structure, and the second flat section 62 is located at the bottom of the first U-shaped frame structure.

[0030] In this embodiment, as shown in Figure 4 , the first flat section 61 is a second U-shaped frame structure, which includes a first flat section 611, a second flat section 612 and a third flat section 613 connected in turn, the first flat section 611 and the third flat section 613 are fixedly arranged on the inner wall of the upper end of the first U-shaped frame structure, and the second flat section 612 is horizontally arranged at the opening of the upper end of the first U-shaped frame structure, and the second flat section 612 protrudes upward from the upper end of the first U-shaped frame structure, so as to facilitate the battery pack into the box.

[0031] In this embodiment, as shown in Figure 4 , the second flat section 62 includes a fourth flat section 621 and a fifth flat section 622 connected in turn, and the fourth flat section 621 and the fifth flat section 622 are fixedly arranged on the inner wall of the bottom of the first U-shaped frame structure, wherein the first flat section 611 and the fourth flat section 621 are respectively located at the end of the upper and lower ends of the Z-shaped support frame.

[0032] In this embodiment, as shown in Figure 4 and 6 , the width of the second support structure 5 is greater than the width of the first support structure 4, the first support structure 4 includes a single Z-shaped support frame 6, and the second support structure 5 includes two Z-shaped support frames 6 arranged symmetrically along the center line of the first U-shaped frame structure. Because the width of the second support structure 5 is greater than the width of the first support structure 4, compared with a single Z-shaped support frame 6, two Z-shaped support frames have better stability, and in addition, a certain gap is left between the two opposite fourth flat sections 621, which facilitates assembly.

[0033] In this embodiment, as shown in Figure 3 and 5 , the lower end of the intermediate beam structure 1 is provided with a first notch 11 matched with the intermediate longitudinal beam structure 2, and the upper end of the intermediate longitudinal beam structure 2 is provided with a second notch 21 matched with the first notch 11, wherein the width of the first notch 11 is matched with the width of the intermediate longitudinal beam structure 2, and the width of the second notch 21 is matched with the width of the intermediate beam structure 1, and the clamping part of the intermediate beam structure 1 and the intermediate longitudinal beam structure 2 is fixedly connected by welding.

[0034] In this embodiment, as shown in Figure 1and 2 As shown in the figure, the battery pack beam structure further comprises a connecting structure 3 for connecting the first support structure 4 and the second support structure 5, the connecting structure 3 comprises a connecting plate 31 and a locking piece (not shown in the figure), which is arranged at the upper end of the first support structure 4 and the second support structure 5, and the first support structure 4, the second support structure 5 and the connecting plate 31 are all provided with an opening for the locking piece to pass through. Wherein the locking piece can be a fixed bolt, the connecting plate 31 and the second flat section 612 of the single Z-shaped support frame 6 arranged transversely below and the second flat section 612 of the two Z-shaped support frames 6 arranged longitudinally are locked and connected by a plurality of fixed bolts, so as to better fix and connect the middle transverse beam structure 1 and the middle longitudinal beam structure 2.

[0035] In this embodiment, as shown in the figure, Figure 4 As shown in the figure, the first flat section 611, the third flat section 613, the fourth flat section 621 and the fifth flat section 622 of the Z-shaped support frame 6 are fixedly arranged on the inner wall of the first U-shaped frame structure by laser welding, and in addition, the third flat section 613 of the two Z-shaped support frames 6 in the middle longitudinal beam structure 2 is also fixedly connected by laser welding.

[0036] The battery pack beam structure of the embodiment is subjected to modal simulation test, and compared with the existing technology, the mode is improved from 33.2Hz to 36.1Hz, so it can be determined that the structural strength of the battery pack box body as a whole is improved.

[0037] The utility model further provides a battery pack, including above-mentioned battery pack beam structure.

[0038] The above-mentioned utility model of the application only expresses the implementation mode of the embodiment of the utility model, and therefore cannot be understood as the limitation of the scope of the utility model patent, and also is not any form of limitation on the structure of the embodiment of the utility model. It should be pointed out that for ordinary skilled persons in the art, under the premise of not departing from the concept of the embodiment of the utility model, a number of changes and improvements can be made, which all belong to the protection scope of the embodiment of the utility model.

Claims

1. A battery pack beam structure, characterized in that: It includes a middle crossbeam structure (1) and a middle longitudinal beam structure (2), which intersect to form an installation space for installing a battery pack; The intermediate crossbeam structure (1) and the intermediate longitudinal beam structure (2) are both hollow structures. The intermediate crossbeam structure (1) and the intermediate longitudinal beam structure (2) are respectively fixedly provided with a first support structure (4) and a second support structure (5). The first support structure (4) and the second support structure (5) each include at least a single Z-shaped support frame (6).

2. The battery pack beam structure according to claim 1, characterized in that: Both the intermediate crossbeam structure (1) and the intermediate longitudinal beam structure (2) are first U-shaped frame structures with openings at the top.

3. The battery pack beam structure according to claim 2, characterized in that: The Z-shaped support frame (6) includes a first straight part (61) and a second straight part (62) respectively disposed at the upper and lower ends of the middle crossbeam structure (1) or the middle longitudinal beam structure (2), and an inclined oblique part (63) for connecting the first straight part (61) and the second straight part (62), wherein the first straight part (61) is located at the opening of the first U-shaped frame structure, and the second straight part (62) is located at the bottom of the first U-shaped frame structure.

4. The battery pack beam structure according to claim 3, characterized in that: The first straight section (61) is a second U-shaped frame structure. The second U-shaped frame structure includes a first straight section (611), a second straight section (612), and a third straight section (613) that are bent and connected in sequence. The first straight section (611) and the third straight section (613) are fixedly installed on the upper inner wall of the first U-shaped frame structure, and the second straight section (612) protrudes upward from the upper end of the first U-shaped frame structure.

5. A battery pack beam structure according to claim 4, characterized in that: The second straight section (62) includes a fourth straight section (621) and a fifth straight section (622) that are bent and connected in sequence. The fourth straight section (621) and the fifth straight section (622) are fixedly installed on the inner wall of the bottom of the first U-shaped frame structure.

6. A battery pack beam structure according to claim 3, characterized in that: The width of the second support structure (5) is greater than the width of the first support structure (4). The first support structure (4) includes a single Z-shaped support frame (6), and the second support structure (5) includes two Z-shaped support frames (6) arranged symmetrically on the left and right sides along the center line of the first U-shaped frame structure.

7. A battery pack beam structure according to claim 1, characterized in that: The lower end of the intermediate crossbeam structure (1) is provided with a first notch (11) that engages with the intermediate longitudinal beam structure (2), and the upper end of the intermediate longitudinal beam structure (2) is provided with a second notch (21) that engages with the first notch (11). The engagement points of the intermediate crossbeam structure (1) and the intermediate longitudinal beam structure (2) are fixedly connected by welding.

8. A battery pack beam structure according to claim 1, characterized in that: It also includes a connecting structure (3) for connecting the first support structure (4) and the second support structure (5). The connecting structure (3) includes a connecting plate (31) and a locking member. The first support structure (4), the second support structure (5) and the connecting plate (31) are all provided with openings for the locking member to pass through.

9. A battery pack beam structure according to claim 5, characterized in that: The first straight section (611), the third straight section (613), the fourth straight section (621) and the fifth straight section (622) of the Z-shaped support frame (6) are fixedly installed on the inner wall of the first U-shaped frame structure by laser welding.

10. A battery pack, characterized in that: Includes the battery pack beam structure as described in any one of claims 1 to 9.

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