Automobile battery pack shell reinforcing structure

Abstract

The invention discloses an automobile battery pack shell reinforcing structure, a frame is arranged in a shell, the frame comprises a side plate and a cross beam, the side plate is fixedly connected with the inner side of the shell, a lifting lug is arranged outside the shell, a supporting beam is arranged at the bottom of the shell, and the lifting lug is connected with the supporting beam. The production efficiency and the battery pack stability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile batteries, and in particular, relates to a reinforced structure of an automobile battery pack shell. Background Art

[0002] The automotive battery housing is an indispensable part of electric vehicles. Its main function is to protect the battery from external impact, high temperature and water seepage, while accommodating high-voltage batteries, electronic components, sensors and connectors. Since the battery housing needs to withstand various mechanical stresses and environmental factors, the structural design of the automotive battery pack shell requires a certain structural strength to protect the internal battery structure, so that the battery can work stably and safely in various use environments for a long time.

[0003] In the prior art, the battery pack shell is mainly reinforced separately, which makes the shell design too complicated and difficult to form in one go, resulting in high development costs. In addition, the number of shell reinforcements is large during the production process, and the amount of welding work is large, resulting in high labor intensity for workers and low production efficiency. The existing battery pack shell reinforcement structure does not take into account the connection with the battery pack mounting structure, and the shell reinforcement does not form an effective connection with the lifting ear. When the battery pack is installed on the vehicle body for a long time, the connection between the battery pack and the vehicle body is prone to failure, and the stability of the battery pack cannot be guaranteed in the long term.

[0004] The invention patent with the publication number CN102785582A disclosed on November 21, 2012, a battery module for electric vehicles, which includes a battery container, a balancing harness assembly is arranged on the front of the battery container, a balancing navigation socket is arranged below the balancing harness assembly, an auxiliary detection wire extends from the battery container, and a safety component is arranged on the auxiliary detection wire. At the same time, an electronic system module is also installed on the front of the battery container, and a battery terminal group is arranged on the back of the battery container. The battery module for electric vehicles cannot solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a car battery pack shell reinforcement structure that reduces shell development costs, improves production efficiency, and improves battery pack stability in view of the deficiencies in the prior art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The automotive battery pack shell reinforcement structure has a frame inside the shell, the frame includes side panels and a cross beam, the side panels are fixedly connected to the inner side of the shell, the shell is provided with a lifting ear outside, a support beam is provided at the bottom of the shell, and the lifting ear is connected to the support beam.

[0008] The lifting ear includes a connecting seat, which is fixedly connected to the side of the shell. The support beam and the lifting ear are in the same straight line. The connecting seats located on both sides of the shell are respectively fixedly connected to the two ends of the support beam; a connecting bolt is also connected between the connecting seat and the support beam.

[0009] A connecting plate is fixedly connected inside the connecting seat, a support plate is provided on the inner side of the support beam, the connecting bolt passes through the support plate, the support beam and the connecting plate, the connecting plate includes an extension plate, the extension plate is located at both ends and the middle of the connecting plate, the extension plate is vertically arranged to the connecting plate, and the extension plate is fixedly connected to the connecting seat.

[0010] The two ends of the crossbeam are fixedly connected to the side panels, the crossbeam divides the internal space of the shell, the cross section of the side panel is a stepped structure, and the upper surface of the side panel is evenly distributed with wire harness hoops.

[0011] A first reinforcing beam is provided at the bottom of the support beam, the first reinforcing beam is clamped with the bottom of the support beam, the edge of the first reinforcing beam is welded and fixed to the support beam, the support beam and the first reinforcing beam are of the same length, and an avoidance gap is provided at the end of the first reinforcing beam below the connecting bolt.

[0012] A longitudinal beam is arranged between the transverse beams at one end of the shell, and the transverse beam and the longitudinal beam are connected to form a placement groove, and two placement grooves are provided, and a first bottom plate and a second bottom plate are respectively arranged in the two placement grooves.

[0013] A positioning notch is provided at one end of the first bottom plate; a positioning protrusion is provided at the edge of the first bottom plate, and a positioning groove is provided at the bottom edge of the frame, and the positioning protrusion cooperates with the positioning groove; overlapping edges are provided at both ends of the second bottom plate, and the overlapping edges are connected to the longitudinal beam by bolts, and flanges are provided on both sides of the second bottom plate, and the flanges are parallel to the sides of the cross beam.

[0014] The support beams and the lifting ears are arranged at equal intervals on the shell; a reinforcing plate is fixedly connected to the inner side of the top end of the lifting ear, and a second reinforcing beam is provided at the bottom of the shell between the support beams, and the cross-section of the second reinforcing beam is an "X"-shaped structure.

[0015] One end of the shell is a conical structure.

[0016] The first bottom plate is provided with a plurality of heat dissipation openings, and the second bottom plate is provided with connection holes evenly distributed.

[0017] The technical effects of the present invention are as follows: by adopting the automotive battery pack shell reinforcement structure of the present invention, the shell reinforcement structure is independent of the shell design, so that the shell design is simplified, the development cost is reduced, the frame structure is reasonably designed, and it has the effects of structural reinforcement, wiring harness layout, and regional separation; the support beam is connected to the lifting ear to achieve an effective connection between the vehicle body installation structure and the shell reinforcement structure, while meeting the structural reinforcement and improving the bearing effect of the lifting ear, ensuring the stability of the battery pack and the vehicle body after installation; in terms of production, the amount of welding work is reduced, which is conducive to the unification and sequential execution of assembly and welding processes, which is conducive to streamlined operations, avoiding the situation where workers frequently switch processes between assembly and welding, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, which show the following contents:

[0019] Figure 1 It is a structural schematic diagram of the automotive battery pack housing reinforcement structure of the present invention;

[0020] Figure 2 is a bottom view of the automotive battery pack housing reinforcement structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the installation of the lifting lug of the present invention;

[0022] Figure 4 It is a schematic diagram of the installation of the connecting bolt of the present invention;

[0023] Figure 5 It is a schematic diagram of the installation of the BMS module and the BDU module of the present invention;

[0024] Figure 6 is a schematic diagram of the installation of the first base plate of the present invention;

[0025] Figure 7 is a schematic diagram of the installation of the second base plate of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the side panel and the wiring harness of the present invention;

[0027] The markings in the figure are: 1. Shell; 2. Frame; 21. Side panel; 22. Crossbeam; 23. Longitudinal beam; 24. Placement slot; 25. Weight reduction hole; 26. Wire harness; 27. Wire harness hoop; 3. Support beam; 31. First reinforcement beam; 32. Second reinforcement beam; 33. Avoidance gap; 34. Support plate; 4. Lifting ear; 41. Connecting seat; 42. Connecting bolt; 43. Connecting plate; 44. Extension plate; 45. Reinforcement plate; 5. First bottom plate; 51. BMS module; 52. Positioning gap; 53. Positioning groove; 54. Positioning protrusion; 55. Heat dissipation opening; 6. Second bottom plate; 61. BDU module; 62. Overlap edge; 63. Flanged edge; 64. Connecting hole. DETAILED DESCRIPTION

[0028] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0029] like Figure 1 As shown, the reinforced structure of the automobile battery pack shell has a frame 2 inside the shell 1, and the frame 2 includes a side plate 21 and a cross beam 22. The side plate 21 is fixedly connected to the inside of the shell 1, and a lifting lug 4 is provided outside the shell 1. A support beam 3 is provided at the bottom of the shell 1, and the lifting lug 4 is connected to the support beam 3. The side plates 21 and the cross beam 22 meet the requirements of reinforcing the inside and side of the shell 1, and the support beam 3 meets the requirements of structural reinforcement of the bottom of the shell 1. The shell 1 is an integrated structure formed by stamping the bottom plate and the side plate. Its structure is simple, saving the development cost of complex structures. The frame 2 and the shell 1 can be formed independently, and only welding is needed to fix the two. The lifting lug 4 is used as the connecting and mounting structure of the battery pack shell 1 and the car body. The lifting lug 4 is connected to the support beam 3, realizing the connection between the mounting structure and the reinforcing structure of the battery pack shell 1, so that the reinforcing structure simultaneously improves the strength of the shell 1 itself and the connecting structure of the lifting lug 4, ensuring the posture stability and functional reliability of the battery pack after being installed on the car body.

[0030] like Figure 3 and Figure 4As shown, the lifting ear 4 includes a connecting seat 41, which is fixedly connected to the side of the shell 1. The support beam 3 and the lifting ear 4 are in the same straight line. The connecting seats 41 located on both sides of the shell 1 are respectively fixedly connected to the two ends of the support beam 3; a connecting bolt 42 is also connected between the connecting seat 41 and the support beam 3. The connection seat 41 is connected to the support beam 3 as a whole while providing a connection position for the lifting ear 4. A single support beam 3 is connected to two lifting ears 4 at the same time, providing a better load-bearing effect for the battery pack, improving the integrated performance of the reinforcing structure on both sides of the battery pack shell 1, and making the structure more solid and reliable. After the battery pack is installed, the connection and fastening force between the lifting ear 4 and the vehicle body is dispersed by the support beam 3, avoiding the failure of the connection between the lifting ear 4 and the vehicle body; the connecting bolt 42 fixes the support beam 3 and the lifting ear 4, so during the assembly operation, the support beam 3 and the lifting ear 4 can be preliminarily assembled into one body through the connecting bolt 42, and the battery pack shell 1 can be set on the support beam 3, and then the subsequent welding operation can be carried out uniformly, so that the assembly operation and the welding operation are carried out in sequence, avoiding the complicated operation process of the staff switching back and forth between two different processes, and improving the production efficiency. Since the connecting bolt 42 is located inside the connection seat 41 and below the support beam 3, its location will not affect the normal influence of the welding operation. During the subsequent welding operation, it is only necessary to weld and fix the support beam 3, the lifting ear 4 and the shell 1 to ensure the stability of the above components.

[0031] like Figure 4 As shown, a connecting plate 43 is fixedly connected inside the connecting seat 41, a supporting plate 34 is provided inside the supporting beam 3, a connecting bolt 42 passes through the supporting plate 34, the supporting beam 3 and the connecting plate 43, and the connecting plate 43 includes an extension plate 44, which is located at both ends and the middle of the connecting plate 43, and the extension plate 44 is vertically arranged with the connecting plate 43, and the extension plate 44 is fixedly connected with the connecting seat 41. The connecting plate 43 is welded to the inner side of the connecting seat 41 by using a plurality of extension plates 44, so as to ensure that the position of the connecting plate 43 inside the connecting seat 41 remains unchanged, the connecting plate 43 and the supporting plate 34 prevent the tightening force of the bolts from acting directly on the supporting beam 3 and the connecting seat 41, and prevent the deformation of the supporting beam 3 and the connecting seat 41, and the connecting plate 43 and the supporting plate 34 also strengthen the connection part between the connecting seat 41 and the supporting beam 3, thereby improving the structural performance.

[0032] like Figure 1 and Figure 8As shown, both ends of the crossbeam 22 are fixedly connected to the side plate 21, and the crossbeam 22 divides the internal space of the housing 1. The cross section of the side plate 21 is a stepped structure, and the upper end surface of the side plate 21 is evenly distributed with a harness hoop 27. The crossbeam 22 forms a supporting effect on both sides of the housing 1, and together with the side plate 21, improves the structural strength of the housing 1. The crossbeam 22 also divides the internal space of the housing 1, so that the battery modules are arranged in groups. After the battery modules are placed, they will be limited by two groups of crossbeams 22, and the stability of the battery modules is higher. The space above the crossbeam 22 is used to arrange copper bars, harnesses 26 or connecting pieces. The stepped side plate 21 strengthens the structural strength of the housing 1 and provides installation space for the harness 26. The harness 26 passes through the harness hoop 27, which fixes the arrangement path of the harness 26, so that the harness 26 is arranged at the edge of the battery pack, which can avoid spatial interference with the battery module, BMS module 51 or BDU module 61. The side panels 21 , the first reinforcement beam 31 and the second reinforcement beam 32 are evenly distributed with weight-reducing holes 25 , meeting the requirements of lightweight design.

[0033] like Figures 2 to 4 As shown, a first reinforcing beam 31 is provided at the bottom of the support beam 3. The first reinforcing beam 31 is clamped with the bottom of the support beam 3. The edge of the first reinforcing beam 31 is welded and fixed to the support beam 3. The length of the support beam 3 is the same as that of the first reinforcing beam 31. The end of the first reinforcing beam 31 is located below the connecting bolt 42 and is provided with an avoidance notch 33. The first reinforcing beam 31 further strengthens the structure of the support beam 3. The support beam 3 and the first reinforcing beam 31 are clamped. The first reinforcing beam 31 can be installed simultaneously with the support beam 3. The welding of the two can be unified in the subsequent welding operation. It is only necessary to weld the first reinforcing beam 31 at the edge of the first reinforcing beam 31 to fix the two. The welding operation is small, and the strength of the integrated structure formed by the two is better. The bottom of the first reinforcing beam 31 is a plane, which has a better support effect on the battery pack, expands the contact area between the battery pack and the vehicle body, and is conducive to ensuring the stability of the posture of the battery pack. The avoidance notch 33 provides space for the tightening operation of the connecting bolt 42.

[0034] like Figure 5 As shown, a longitudinal beam 23 is provided between the cross beams 22 at one end of the housing 1, and the cross beam 22 and the longitudinal beam 23 are connected to form a placement groove 24, and two placement grooves 24 are provided, and a first bottom plate 5 and a second bottom plate 6 are respectively provided in the two placement grooves 24. The cross beam 22 and the longitudinal beam 23 divide the internal space at one end of the housing 1, forming two placement grooves 24 for installing the BMS module 51 and the BDU module 61. The first bottom plate 5 is used to install the BMS module 51, and the second bottom plate 6 is used to install the BDU module 61. The placement groove 24 separates the above two modules so that the installation spaces of the two do not interfere with each other. The BMS module 51 and the BDU module 61 are both centrally arranged at one end of the housing 1, realizing the integrated installation of the electric control components, which is conducive to improving the assembly efficiency.

[0035] like Figure 5 and Figure 6 As shown, a positioning notch 52 is provided at one end of the first bottom plate 5; a positioning protrusion 54 is provided at the edge of the first bottom plate 5, and a positioning groove 53 is provided at the bottom edge of the frame 2, and the positioning protrusion 54 cooperates with the positioning groove 53; overlapping edges 62 are provided at both ends of the second bottom plate 6, and the overlapping edges 62 are connected to the longitudinal beam 23 by bolts, and flanges 63 are provided on both sides of the second bottom plate 6, and the flanges 63 are parallel to the sides of the cross beam 22. The positioning notch 52 and the positioning protrusion 54 ensure that the first bottom plate 5 is stably installed in the placement groove 24. The first bottom plate 5 can ensure the stability of the BMS module 51 without the use of connecting parts. The overlapping edge 62 suspends the bottom of the second bottom plate 6 by overlapping, which is convenient for the installation of the BDU module 61 connecting part at the bottom of the second bottom plate 6. The flange 63 limits the movement of the second bottom plate 6, which is convenient for the overlapping edge 62 to be fixed to the longitudinal beam 23 with bolts; the first bottom plate 5 is in contact with the shell 1, that is, it is in the same plane as the bottom of the shell 1, the second bottom plate 6 is at the same height as the plane where the longitudinal beam 23 is located, and the height of the first bottom plate 5 is lower than that of the second bottom plate 6. The height of the BMS module 51 is reduced when it is installed in a vertical posture, thereby reducing the volume of the battery pack.

[0036] like Figure 2 As shown, the support beams 3 and the lifting lugs 4 are arranged at equal intervals on the shell 1; a reinforcing plate 45 is fixedly connected to the inner side of the top of the lifting lug 4, and a second reinforcing beam 32 is arranged between the support beams 3 at the bottom of the shell 1, and the cross section of the second reinforcing beam 32 is an "X"-shaped structure. The above structure provides multiple connection points for the car body to improve stability; to prevent the lifting lug 4 from deforming, a reinforcing plate 45 is welded at its bottom to improve strength; to ensure the uniformity of the reinforcement effect on the bottom of the shell 1, a second reinforcing beam 32 in the shape of an "X" is arranged between the support beams 3 to improve strength.

[0037] like Figure 1 and Figure 2 As shown, one end of the housing 1 is a conical structure. The above structure makes the appearance of the battery pack more recognizable, and when the battery pack is installed on the vehicle body, it will not be installed upside down, reducing the occurrence of assembly errors.

[0038] like Figure 5 and Figure 6 As shown, a plurality of heat dissipation openings 55 are provided on the first bottom plate 5, and connection holes 64 are evenly distributed on the second bottom plate 6. The heat dissipation openings 55 meet the heat dissipation requirements of the BMS module 51, and the connection holes 64 are distributed in a matrix on the second bottom plate 6, which meets the position adjustment of the BDU module 61 when the copper bus and the wiring harness 26 are arranged in different situations.

[0039] The automotive battery pack shell reinforcement structure makes the reinforcement structure of the shell 1 independent of the shell 1 design, so that the shell 1 design returns to simplicity and reduces the development cost. The frame 2 structure is reasonably designed, and has the effects of structural reinforcement, wiring harness 26 layout, and area separation. The support beam 3 is connected with the lifting ear 4 to achieve an effective connection between the vehicle body installation structure and the shell 1 reinforcement structure, while satisfying the structural reinforcement. The bearing effect of the lifting ear 4 is improved, ensuring the stability of the battery pack and the vehicle body after installation; in terms of production, the amount of welding work is reduced, which is conducive to the unification and sequential execution of the assembly and welding processes, which is conducive to streamlined operations, avoiding the situation where workers frequently switch processes between assembly and welding, and improving production efficiency.

[0040] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A vehicle battery pack housing reinforcement structure, characterized in that: A frame (2) is provided inside the shell (1), the frame (2) comprises a side plate (21) and a cross beam (22), the side plate (21) is fixedly connected to the inner side of the shell (1), a lifting lug (4) is provided outside the shell (1), a support beam (3) is provided at the bottom of the shell (1), and the lifting lug (4) is connected to the support beam (3).

2. The automotive battery pack housing reinforcement structure according to claim 1, characterized in that: The lifting lug (4) comprises a connecting seat (41), the connecting seat (41) is fixedly connected to the side of the shell (1), the support beam (3) and the lifting lug (4) are in the same straight line, and the connecting seats (41) located on both sides of the shell (1) are respectively fixedly connected to the two ends of the support beam (3); a connecting bolt (42) is also connected between the connecting seat (41) and the support beam (3).

3. The automotive battery pack housing reinforcement structure according to claim 2, characterized in that: A connecting plate (43) is fixedly connected inside the connecting seat (41); a supporting plate (34) is provided inside the supporting beam (3); the connecting bolt (42) passes through the supporting plate (34), the supporting beam (3) and the connecting plate (43); the connecting plate (43) comprises an extension plate (44); the extension plate (44) is located at both ends and a middle part of the connecting plate (43); the extension plate (44) is vertically arranged with the connecting plate (43); and the extension plate (44) is fixedly connected to the connecting seat (41).

4. The automotive battery pack housing reinforcement structure according to any one of claims 1 to 3, characterized in that: The two ends of the cross beam (22) are fixedly connected to the side plate (21); the cross beam (22) divides the internal space of the shell (1); the cross section of the side plate (21) is a stepped structure; and the upper end surface of the side plate (21) is evenly distributed with wire harness hoops (27).

5. The automotive battery pack housing reinforcement structure according to claim 4, characterized in that: A first reinforcing beam (31) is provided at the bottom of the support beam (3); the first reinforcing beam (31) is clamped with the bottom of the support beam (3); the edge of the first reinforcing beam (31) is welded and fixed to the support beam (3); the support beam (3) and the first reinforcing beam (31) are of the same length; an avoidance notch (33) is provided at the end of the first reinforcing beam (31) below the connecting bolt (42).

6. The automotive battery pack housing reinforcement structure according to claim 5, characterized in that: A longitudinal beam (23) is provided between the transverse beams (22) at one end of the shell (1); the transverse beam (22) and the longitudinal beam (23) are connected to form a placement groove (24); two placement grooves (24) are provided, and a first bottom plate (5) and a second bottom plate (6) are respectively provided in the two placement grooves (24).

7. The automotive battery pack housing reinforcement structure according to claim 6, characterized in that: A positioning notch (52) is provided at one end of the first bottom plate (5); a positioning protrusion (54) is provided at the edge of the first bottom plate (5), and a positioning groove (53) is provided at the bottom edge of the frame (2), and the positioning protrusion (54) cooperates with the positioning groove (53); overlapping edges (62) are provided at both ends of the second bottom plate (6), and the overlapping edges (62) are connected to the longitudinal beam (23) by bolts, and flanges (63) are provided on both sides of the second bottom plate (6), and the flanges (63) are parallel to the side of the cross beam (22).

8. The automotive battery pack housing reinforcement structure according to claim 5, characterized in that: The support beams (3) and the lifting ears (4) are arranged at equal intervals on the shell (1); a reinforcing plate (45) is fixedly connected to the inner side of the top end of the lifting ear (4); a second reinforcing beam (32) is provided at the bottom of the shell (1) between the support beams (3); and the cross section of the second reinforcing beam (32) is an "X"-shaped structure.

9. The automotive battery pack housing reinforcement structure according to claim 5, characterized in that: One end of the shell (1) is a conical structure.

10. The automotive battery pack housing reinforcement structure according to claim 7, characterized in that: The first bottom plate (5) is provided with a plurality of heat dissipation openings (55), and the second bottom plate (6) is provided with connection holes (64) evenly distributed.

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