Battery pack box body, battery pack and vehicle

Abstract

The utility model discloses a battery pack box body, a battery pack and a vehicle, the battery pack comprises a box body and a plurality of cross beams, and the box body comprises a bottom protective plate and a side coaming which are integrally formed; a plurality of cross beams are arranged in the box body at intervals in the length direction of the box body, the cross beams are connected with the bottom protection plate and the side surrounding plates, and wire harness fixing structures used for fixing wire harnesses are arranged on the cross beams. According to the technical scheme, the strength and rigidity of the battery pack box body can be ensured, and meanwhile, the light weight level of the battery pack is improved.

Description

Technical Field

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

[0002] In order to ensure the overall strength and torsional stiffness of the battery pack, cross beams and longitudinal beams are usually set in the battery pack, and multiple wire harnesses are arranged inside the battery pack. In order to prevent the wire harnesses from shaking and wearing, additional wire harness fixing brackets are required, which results in a lower energy density of the battery pack. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery pack case, aiming to ensure the strength and rigidity of the battery pack case, while improving the lightweight level of the battery pack.

[0004] In order to achieve the above-mentioned purpose, the battery pack box proposed by the utility model includes:

[0005] The box body includes an integrally formed bottom guard plate and side panels; and

[0006] A plurality of cross beams are arranged in the box body at intervals along the length direction of the box body, the cross beams connect the bottom guard plate and the side panels, and a wire harness fixing structure for fixing the wire harness is provided on the cross beams.

[0007] Optionally, the crossbeam includes a main body portion connected to the box body, an assembly cavity is formed between the main body portion and the bottom guard plate, and the wiring harness fixing structure is provided on the main body portion.

[0008] Optionally, the main body is provided with a reinforcement groove recessed toward the bottom guard plate;

[0009] And / or, the main body is also provided with a weight-reducing hole.

[0010] Optionally, in the length direction of the box body, opposite sides of the main body are bent and connected with first flanges, and the first flanges are connected to the bottom guard plate.

[0011] Optionally, in the width direction of the box body, the two opposite sides of the main body are bent and connected with second flanges, and the second flanges are connected to the side panels and extend in a direction away from the bottom guard plate.

[0012] Optionally, at least one reinforcing rib is provided between the second flange and the main body;

[0013] And / or, the width of the second flange is greater than the width of the main body.

[0014] Optionally, the wire harness fixing structure includes a positioning hole formed on the crossbeam, and a wire harness fixing piece connected to the positioning hole, and the wire harness is fixedly installed on the wire harness fixing piece.

[0015] Optionally, a mounting hole for a cable tie to pass through is formed at the free end of the cable tie, and the cable tie is used to fix the cable tie to the cable tie.

[0016] Optionally, the side panel is provided with a fixing position, and a plurality of the fixing positions are arranged at intervals and match the direction of the wiring harness from the crossbeam to the battery management module;

[0017] And / or, the distance between two adjacent beams is adjustable.

[0018] The utility model also provides a battery pack, which includes the battery pack box as described above.

[0019] The utility model also provides a vehicle, which comprises the battery pack as described above.

[0020] In the technical solution of the utility model, the bottom guard plate and the side panel are formed in one piece, eliminating the assembly process and assembly cost therebetween, and the structural strength and rigidity of the battery pack case are enhanced by utilizing the connection between the cross beam and the bottom guard plate and the side panel. At the same time, compared with the connection method of additionally adding a wiring harness fixing bracket, the integrated design of the wiring harness fixing structure and the cross beam further improves the lightweight level of the battery pack case, which helps to improve the energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a schematic structural diagram of an embodiment of a battery pack box of the utility model;

[0023] Figure 2 for Figure 1 A cross-sectional view of a battery pack box;

[0024] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of an embodiment of a middle crossbeam, in which the crossbeam is located in the middle of the battery pack box;

[0026] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0027] Figure 6 for Figure 1 A schematic diagram of the structure of another embodiment of the middle cross beam, in which the cross beam is located at the edge of the battery pack box;

[0028] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0029] Figure 8 for Figure 1 Schematic diagram of the structure of the middle box body and crossbeam.

[0030] Description of Figure Numbers:

[0031] Label name Label name 10 Box body 213 Positioning hole 11 Bottom guard plate 22 First Flanging 12 Side panels 23 Second Flanging 121 Fixed position 24 Reinforcement ribs 20 beam 30 Wiring harness fixings 21 Main body 31 Mounting holes 211 Reinforcement groove 40 Wiring Harness 212 Weight reduction hole 50 Battery Management Module

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] The utility model provides a battery pack box.

[0038] Reference Figures 1 to 8 In an embodiment of the utility model, the battery pack case includes a case body 10 and a plurality of cross beams 20, the case body 10 includes an integrally formed bottom guard plate 11 and a side panel 12; a plurality of cross beams 20 are arranged in the case body 10 at intervals along the length direction of the case body 10, the cross beams 20 connect the bottom guard plate 11 and the side panel 12, and a wiring harness fixing structure for fixing the wiring harness 40 is provided on the cross beams 20 to ensure the strength and rigidity of the battery pack case and, at the same time, improve the lightweight level of the battery pack.

[0039] The bottom guard plate 11 and the side panels 12 are integrally formed by stamping, which can facilitate the production and processing of the box body 10, ensure processing efficiency and processing quality, and reduce the number of parts and reduce the weight of the box body 10. Of course, in other embodiments, they can also be integrally formed by casting or injection molding.

[0040] Each cross beam 20 is arranged in the box body 10 and is spaced apart along the length direction of the box body 10 so that the battery module can be placed between two adjacent cross beams 20, wherein the cross beam 20 can be connected to the bottom guard plate 11 and the side panel 12, and the effective connection area between the cross beam 20 and the box body 10 is increased. Due to the angled arrangement of the bottom guard plate 11 and the side panel 12, the structural strength and rigidity of the battery pack box are effectively improved.

[0041] In addition, a wiring harness fixing structure is also provided on the cross beam 20. Compared with the additional provision of a wiring harness fixing bracket, an integrated design of the cross beam 20 and the wiring harness fixing structure is realized, which effectively reduces the overall weight of the battery pack case and reduces the cost. The box body 10 is an integrally molded part, which further improves the lightweight level of the battery pack case, helps to improve the energy density of the battery pack, and reduces the risk of shaking and wear of the wiring harness 40.

[0042] In the technical solution of the present utility model, the bottom guard plate 11 and the side panel 12 are integrally formed, eliminating the assembly process and assembly cost therebetween, and the cross beam 20 is used to connect the bottom guard plate 11 and the side panel 12 to enhance the structural strength and rigidity of the battery pack case. At the same time, compared with the connection method of adding an additional wiring harness fixing bracket, the integrated design of the wiring harness fixing structure and the cross beam 20 further improves the lightweight level of the battery pack case, which helps to improve the energy density of the battery pack.

[0043] In one embodiment, the crossbeam 20 includes a main body 21 connected to the box body 10, an assembly cavity is formed between the main body 21 and the bottom guard plate 11, and the wire harness fixing structure is provided on the main body 21. It can be understood that the main body 21 is connected to the box body 10, and its connection method includes but is not limited to screw locking, welding, bonding, and plug-in, and then together with the adjacent crossbeams 20, it defines the installation spacing of the matching battery module to ensure the reliable assembly of the battery module; because the main body 21 has a large area, the wire harness fixing structure can be arranged on the main body 21, wherein a plurality of wire harness fixing structures can be arranged according to the specific direction of the wire harness 40, so as to ensure the stable connection of the wire harness 40 in the battery pack box, and the main body 21 and the bottom guard plate 11 form an assembly cavity after assembly, which is convenient for avoiding the wire harness fixing structure and preventing the wire harness fixing structure from passing through the bottom guard plate 11 and affecting the sealing of the battery pack, and can also reduce the weight.

[0044] In order to improve the structural strength of the cross beam 20, in one embodiment, the main body 21 is provided with a reinforcement groove 211 which is recessed toward the bottom guard plate 11. Figure 4 As shown, the reinforcement groove 211 extends along the length direction of the main body 21 or the width direction of the box body 10 to form a waist-shaped groove. At this time, the reinforcement groove 211 is recessed in the direction of the bottom guard plate 11, which can not only reasonably utilize the space of the assembly cavity and reduce the risk of the height of the beam 20 being too high, but also enhance the overall strength of the beam 20 to ensure the support and fixing ability of the wiring harness 40. However, in other embodiments, the reinforcement groove 211 can be configured as a reinforcement rib protruding in the direction away from the bottom guard plate 11, or the reinforcement groove 211 is not provided on the main body 21.

[0045] Optionally, in one embodiment, the main body 21 is further provided with a weight-reducing hole 212, which can be provided on the bottom wall of the reinforcing groove 211 or near the notch of the reinforcing groove 211. Without affecting the assembly of the wiring harness 40 on the crossbeam 20 and the structural strength of the crossbeam 20, a plurality of weight-reducing holes 212 can be provided, and the weight-reducing holes 212 can be arranged at least one of the bottom wall of the reinforcing groove 211 and near the notch of the reinforcing groove 211.

[0046] Reference Figures 4 to 7In one embodiment, in the length direction of the box body 10, the two opposite sides of the main body 21 are bent and connected with first flanges 22, and the first flanges 22 are connected to the bottom guard plate 11 to ensure the connection stability and convenience between the main body 21 and the bottom guard plate 11. A plurality of first flanges 22 may be provided, and they are arranged at intervals along the length extension direction of the main body 21, or a notch is provided on the side of the first flange 22 away from the main body 21 to improve the lightweight level of the crossbeam. Of course, in other embodiments, one of the two opposite sides of the main body 21 is connected with the first flange 22, and the other side directly abuts against the side panel 12.

[0047] Furthermore, in one embodiment, in the width direction of the box body 10, the two opposite sides of the main body 21 are bent and connected with second flanges 23, and the second flanges 23 are connected to the side panels 12 and extend in a direction away from the bottom guard plate 11. This increases the connection area between the cross beam 20 and the box body 10, and at the same time, the extension direction of the second flange 23 is set at an angle to the extension direction of the first flange 22, which helps to improve the connection strength and rigidity between the cross beam 20 and the box body 10.

[0048] Reference Figure 4 and Figure 7 In one embodiment, at least one reinforcing rib 24 is provided between the second flange 23 and the main body 21 to enhance the connection strength between the second flange 23 and the main body 21, wherein one, two or even three reinforcing ribs 24 may be provided according to the specific size of the connection between the second flange 23 and the main body 21.

[0049] Specifically, in one embodiment, the width of the second flange 23 is greater than the width of the main body 21 , and thus the second flange 23 is connected to the side panel 12 via a larger connecting surface, thereby improving the connection strength between the second flange 23 and the side panel 12 .

[0050] Reference Figures 2 to 4 In one embodiment, the harness fixing structure includes a positioning hole 213 formed on the crossbeam 20, and a harness fixing member 30 connected to the positioning hole 213, and the harness is fixedly installed on the harness fixing member 30, wherein the positioning hole 213 is provided on the main body 21, and even provided on the bottom wall of the reinforcing groove 211, and the harness fixing member 30 is detachably connected to the positioning hole 213, and can at least partially extend into the assembly cavity, so as to ensure the connection between the harness fixing member 30 and the crossbeam 20, and ensure the stable connection of the harness 40 on the crossbeam 20 through the harness fixing member 30. The number of positioning holes 213 and harness fixing member 30 may be different, and the harness fixing member 30 may be selectively connected to the positioning hole 213. However, in other embodiments, the harness fixing structure is integrally provided with the crossbeam, and is formed integrally, welded, etc.

[0051] The harness fixing part 30 includes a buckle column, a limiting wing and a plurality of laminations arranged on the outer periphery of the buckle column. When the harness fixing part 30 is fixedly installed in the positioning hole 213, it is only necessary to pass each lamination through the positioning hole 213, and the limiting wing is pressed against the edge of the positioning hole 213 to realize the installation of the harness fixing part 30, and the end of the buckle column away from the lamination is used to fix the harness 40; specifically, in one embodiment, the free end of the harness fixing part 30 is provided with a mounting hole 31 for the cable tie to pass through, and the harness 40 is fixed to the harness fixing part 30 by the cable tie. It can be understood that the mounting hole 31 passes through the buckle column along the radial direction of the buckle column, so that the cable tie is passed through the mounting hole 31, and then forms a mounting ring for the harness 40 to pass through, thereby ensuring the stable assembly of the harness 40 on the beam 20. Of course, in other embodiments, other harness fixing parts 30 that can connect the beam 20 and the harness 40 are also applicable to the present application, which is not limited here.

[0052] In order to ensure the stable assembly of the wire harness 40 in the box body 10, in one embodiment, as shown in FIG. Figure 1 and Figure 8 As shown, the side panel 12 is provided with a fixing position 121, and a plurality of the fixing positions 121 are arranged at intervals and match the direction of the wiring harness from the cross beam 20 to the battery management module 50. Then, the wiring harness 40 connected to the battery module is first fixed by the wiring harness fixing part 30 on the cross beam 20 to ensure a reliable connection between the wiring harness 40 and the battery module; then, the wiring harness 40 extends along the surface of the side panel 12, specifically along the assembly gap between the battery module and the side panel 12, and extends toward the wiring side on the battery management module 50. In this process, in order to ensure the stability of the wiring harness 40 in the assembly gap, the fixing position 121 can be configured as a pipe clamp so that the wiring harness 40 can be installed on the side panel 12.

[0053] Optionally, in one embodiment, the spacing between two adjacent beams 20 is adjustable, so that battery modules of different sizes can be adaptively assembled according to power demand, thereby improving the assembly versatility of the battery pack box. Specifically, by changing the welding position of the beam 20 in the box body 10, for example, in this embodiment, three beams 20 are provided, and the welding positions of two of the beams 20 are adjusted, thereby adjusting the spacing between two adjacent beams 20. At this time, the two spacings are not equal, which meets the assembly of battery modules of different sizes, and realizes that one box body 10 can be compatible with battery modules of different sizes, which helps to shorten the development cycle of the battery pack and reduce costs.

[0054] The utility model also proposes a battery pack, which includes a battery pack case. The specific structure of the battery pack case refers to the above-mentioned embodiment. Since the battery pack adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0055] The utility model also proposes a vehicle, which includes a battery pack. The specific structure of the battery pack refers to the above-mentioned embodiment. Since the vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0056] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery pack box, characterized in that: include: The box body includes an integrally formed bottom guard plate and side panels; and A plurality of cross beams are arranged in the box body at intervals along the length direction of the box body, the cross beams connect the bottom guard plate and the side panels, and a wire harness fixing structure for fixing the wire harness is provided on the cross beams.

2. The battery pack box according to claim 1, characterized in that: The cross beam comprises a main body portion connected to the box body, an assembly cavity is formed between the main body portion and the bottom guard plate, and the wire harness fixing structure is arranged on the main body portion.

3. The battery pack box according to claim 2, characterized in that: The main body is provided with a reinforcement groove recessed toward the bottom guard plate; And / or, the main body is also provided with a weight-reducing hole.

4. The battery pack box according to claim 2, characterized in that: In the length direction of the box body, opposite sides of the main body are bent and connected with first flanges, and the first flanges are connected to the bottom guard plate.

5. The battery pack box according to claim 2, characterized in that: In the width direction of the box body, opposite sides of the main body are bent and connected with second flanges, and the second flanges are connected to the side panels and extend in a direction away from the bottom guard plate.

6. The battery pack case according to claim 5, characterized in that: At least one reinforcing rib is provided between the second flange and the main body; And / or, the width of the second flange is greater than the width of the main body.

7. The battery pack box according to claim 1, characterized in that: The wire harness fixing structure comprises a positioning hole formed on the cross beam and a wire harness fixing piece connected to the positioning hole, and the wire harness is fixedly installed on the wire harness fixing piece.

8. The battery pack box according to claim 7, characterized in that: The free end of the wire harness fixing piece is provided with a mounting hole for the cable tie to pass through, and the wire harness is fixed to the wire harness fixing piece by the cable tie.

9. The battery pack case according to claim 1, characterized in that: The side panel is provided with a fixing position, and a plurality of the fixing positions are arranged at intervals and match the direction of the wiring harness from the crossbeam to the battery management module; And / or, the distance between two adjacent beams is adjustable.

10. A battery pack, characterized in that: Comprising a battery pack case as claimed in any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 10.

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