Battery pack fixing and supporting structure and new energy tractor

Abstract

The utility model relates to the field of battery pack layout of pure electric tractors, in particular to a battery pack fixing and supporting structure and a new energy tractor, the battery pack fixing and supporting structure comprises a frame and a battery pack, the frame is provided with a mounting groove used for containing the battery pack, and the bottom of the battery pack is located in the mounting groove of the frame. A gap exists between the bottom of the battery pack and the bottom of the mounting groove, and the two opposite sides of the battery pack are fixedly connected with the frame through side supporting structures correspondingly. The layout of the battery pack can be optimized, high-frequency vibration during operation of a tractor is prevented from being directly conducted to the battery pack, and the failure risk of a battery cell is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the battery package layout field of pure electric tractor, specifically, relate to a battery package fixed support structure and new energy tractor. BACKGROUND

[0002] Pure electric tractor as the important development direction of agricultural machinery electrification, the layout and design of power battery package directly influence the reliability, safety and economy of whole car. The current mainstream scheme fixes the battery package on the top of the frame, this design has certain advantage although, but also has obvious technical pain point, the following carries out detailed analysis from multiple dimensions:

[0003] The existing problems of battery package top layout:

[0004] 1. Mechanical vibration amplification effect: because the bottom of the battery package is close to the frame, the low-frequency high-amplitude vibration generated during the operation of the tractor (such as plowing, harvesting) is directly transmitted to the top battery package through the rigid frame;

[0005] 2. Cell stress accumulation: the welding points and tabs of the cell (especially square hard shell or cylindrical battery) are prone to metal fatigue under long-term vibration, resulting in internal short circuit or connection failure. INVENTION CONTENTS

[0006] The utility model aims at providing a battery package fixed support structure, which can optimize the layout of the battery package, prevent the direct transmission of high-frequency vibration to the battery package during the operation of the tractor, and reduce the risk of cell failure.

[0007] Another object of the utility model is to provide a new energy tractor, which can optimize the layout of the battery package, prevent the direct transmission of high-frequency vibration to the battery package during the operation of the tractor, and reduce the risk of cell failure.

[0008] The technical scheme of the utility model is as follows:

[0009] A battery package fixed support structure, comprising a frame and a battery package, the frame is provided with a mounting slot for accommodating the battery package, the bottom of the battery package is located in the mounting slot of the frame, and there is a gap between the bottom of the battery package and the bottom of the mounting slot, the opposite sides of the battery package are respectively connected and fixed with the frame through side support structures.

[0010] Further, the side support structure comprises a lower connecting part and an upper connecting part arranged on the top of the lower connecting part, the lower connecting part is connected and fixed with the frame, and the upper connecting part is connected and fixed with the battery package.

[0011] Further, the lower connecting part is a vertical plate, the upper connecting part is a horizontal bearing plate, and the horizontal bearing plate and the vertical plate are in T shape.

[0012] Further, a plurality of first bolt holes for connecting with the frame are formed on the vertical plate, and first connecting bolts are installed in the first bolt holes.

[0013] Further, a plurality of positioning pin holes are formed on the vertical plate and the frame respectively, the positioning pin holes on the frame are arranged one by one corresponding to the positioning pin holes on the vertical plate, and positioning pins are installed.

[0014] Further, a plurality of reinforcing ribs are arranged at the corners of the horizontal bearing plate on both sides of the vertical plate.

[0015] Further, the side support structure further comprises an L-shaped plate, the L-shaped plate is arranged on the top of the horizontal bearing plate, and the horizontal bearing plate is connected and fixed with the battery pack through the L-shaped plate.

[0016] Further, the L-shaped plate comprises a horizontal part and a vertical part, the horizontal part is attached to and fixed with the horizontal bearing plate, and the vertical part is attached to and fixed with the battery pack.

[0017] Further, a U-shaped reinforcing plate is arranged on the top of the horizontal part, the bottom plate of the U-shaped reinforcing plate is attached to and welded with the horizontal part, and the two side plates of the U-shaped reinforcing plate are welded with the vertical part.

[0018] The bottom plate of the U-shaped reinforcing plate, the horizontal part and the horizontal bearing plate are provided with second bolt holes penetrating in the vertical direction, and a bolt assembly is installed in the second bolt holes.

[0019] A new energy tractor comprises the battery pack fixing and supporting structure.

[0020] Compared with the prior art, the battery pack fixing and supporting structure has the following beneficial effects:

[0021] In the application, the opposite sides of the battery pack are respectively connected and fixed with the frame through the side support structure, and the bottom of the battery pack is located in the mounting groove of the frame and has a gap with the bottom of the mounting groove, which not only avoids the direct contact between the bottom of the battery pack and the frame and the direct transmission of the vibration of the frame to the battery pack, reduces the risk of vibration failure of the battery pack, but also reduces the position of the gravity center of the fixed battery pack, improves the stability of the battery pack, and makes the vehicle more stable during high-speed driving or turning, reduces the roll angle, and improves the anti-rollover ability of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0023] Figure 1 isometric view of the battery pack fixing and supporting structure of the present application;

[0024] Figure 2 isometric view of the battery pack fixing and supporting structure of the present application;

[0025] Figure 3 isometric view of the side supporting structure of the present application;

[0026] Figure 4 isometric view of the connection structure of the vertical plate, horizontal bearing plate, reinforcing rib and vertical positioning reinforcing plate of the present application;

[0027] Figure 5 front view of the connection structure of the vertical plate, horizontal bearing plate, reinforcing rib and vertical positioning reinforcing plate of the present application.

[0028] In the drawings:

[0029] 1- vertical plate; 101- first bolt hole; 102- positioning pin hole; 103- avoiding slot hole; 104- first connecting bolt;

[0030] 2- horizontal bearing plate; 201- second bolt hole;

[0031] 3- L-shaped plate; 301- vertical part; 302- horizontal part;

[0032] 4- U-shaped reinforcing plate;

[0033] 5- reinforcing rib; 6- vertical positioning reinforcing plate;

[0034] 7- bolt assembly; 701- nut;

[0035] 8- battery pack; 9- vehicle frame; 901- mounting groove; 10- side supporting structure. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based upon the embodiments of the present application, all other embodiments that would be obvious to one of ordinary skill in the art and that are within the scope of the present application belong to the scope of the present application.

[0038] It should be noted that similar reference numbers and characters refer to like items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0039] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are merely for the convenience of describing the present application and simplifying the description, and therefore, cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are merely used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0041] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Embodiment 1

[0044] Reference Figures 1-5The embodiment provides a battery pack fixing and supporting structure, which comprises a vehicle frame 9 and a battery pack 8, the vehicle frame 9 is provided with a mounting groove 901 for accommodating the battery pack 8, the bottom of the battery pack 8 is located in the mounting groove 901 of the vehicle frame 9, and there is a gap between the bottom of the battery pack 8 and the bottom of the mounting groove 901, and the opposite sides of the battery pack 8 are respectively connected and fixed with the vehicle frame 9 through side supporting structures 10.

[0045] Since the vehicle frame 9 is a casting part, the side supporting structure 10 can only be designed on the side of the vehicle frame 9 and the battery pack 8 to play a transition connection role due to the casting process and cost and the like.

[0046] The side supporting structure 10 is a sheet metal tailor-welded part and can provide fixing and supporting for the power battery (battery pack 8). The side supporting structures 10 on the two sides are symmetrically arranged on the opposite sides of the battery pack 8, thereby improving stability.

[0047] In the application, the opposite sides of the battery pack 8 are respectively connected and fixed with the vehicle frame 9 through the side supporting structures 10, and the bottom of the battery pack 8 is located in the mounting groove 901 of the vehicle frame 9 and has a gap with the bottom of the mounting groove 901, so that the bottom of the battery pack 8 is avoided from directly contacting the vehicle frame 9, vibration of the vehicle frame 9 is avoided from being directly conducted to the battery pack 8, the risk of vibration failure of the battery pack 8 is reduced, and the gravity center position of the fixed battery pack 8 is reduced. The battery pack 8 with the reduced gravity center has the following technical effects:

[0048] 1. Improved maneuverability

[0049] The reduced gravity center makes the vehicle more stable during high-speed driving or turning, and reduces the roll angle.

[0050] The anti-rollover ability of the vehicle is improved, especially on the emergency avoidance or rugged road.

[0051] 2. Optimized energy efficiency

[0052] The lower gravity center helps to reduce the loss of tire grip, thereby improving energy utilization and mileage.

[0053] Balanced mass distribution can reduce the load of the suspension system, and further reduce mechanical loss.

[0054] In the embodiment, the side supporting structure 10 comprises a lower connecting part and an upper connecting part arranged on the top of the lower connecting part, the lower connecting part is connected and fixed with the vehicle frame 9, and the upper connecting part is connected and fixed with the battery pack 8.

[0055] Specifically, the upper connecting part and the lower connecting part are both plate-shaped structures, and the lower connecting part is a vertical plate 1 which can be attached to the side of the frame 9 when installed, and the upper connecting part is a horizontal bearing plate 2 which is in T shape with the longitudinal section of the vertical plate 1.

[0056] The vertical plate 1 is attached to the outer side of the frame 9, and a plurality of first bolt holes 101 for connecting with the frame 9 are formed on the vertical plate 1, and a plurality of first bolt holes 101 are also formed on the outer side of the frame 9, and the first bolt holes 101 on the frame 9 and the first bolt holes 101 on the vertical plate 1 are arranged one-to-one and installed with first connecting bolts 104, and the vertical plate 1 is connected and fixed with the frame 9 through the plurality of first connecting bolts 104.

[0057] A plurality of positioning pin holes 102 are formed on the vertical plate 1 and the frame 9 respectively, and the positioning pin holes 102 on the frame 9 and the positioning pin holes 102 on the vertical plate 1 are arranged one-to-one and installed with positioning pins, and all the positioning pins are installed before the first connecting bolts 104 are installed, so as to position the vertical plate 1 and the frame 9, and then all the first connecting bolts 104 are installed to realize the positioning installation of the vertical plate 1.

[0058] In order to ensure the accuracy of the relative position of the side support structure 10 and the frame 9, two positioning pin holes 102 are provided on the vertical plate 1, which can be accurately positioned by the positioning pins on the frame and ensure the levelness of the horizontal bearing plate 2.

[0059] The vertical plate 1 and the horizontal bearing plate 2 are fixed by welding, and in order to ensure the connecting strength between the vertical plate 1 and the horizontal bearing plate 2, a plurality of reinforcing ribs 5 are arranged at the corners of the horizontal bearing plate 2 on both sides of the vertical plate 1, so as to ensure the connecting strength and stability therebetween.

[0060] The horizontal bearing plate 2 and the vertical plate 1 are welded in a perpendicular state, and in order to ensure the strength, reinforcing ribs 5 are intermittently arranged along the length direction thereof.

[0061] The side support structure 10 further comprises an L-shaped plate 3, and the L-shaped plate 3 is arranged on the top of the horizontal bearing plate 2, and the horizontal bearing plate 2 is connected and fixed with the battery pack 8 through the L-shaped plate 3.

[0062] Specifically, the L-shaped plate 3 comprises a horizontal part 302 and a vertical part 301, the horizontal part 302 is attached to and connected with the horizontal bearing plate 2, and the vertical part 301 is attached to and connected with the battery pack 8.

[0063] The top of the horizontal part 302 is provided with a plurality of U-shaped reinforcing plates 4, which are sequentially arranged at the corners of the L-shaped plate 3. The bottom plate of the U-shaped reinforcing plate 4 is attached to and welded with the horizontal part 302. The two side plates of the U-shaped reinforcing plate 4 are symmetrically arranged in a trapezoidal plate structure. The long side of the trapezoidal plate structure is attached to and welded with the plate surface of the vertical part 301. The short side of the trapezoidal plate structure does not exceed the outer side of the horizontal part 302. The L-shaped plate 3 establishes the connection between the horizontal bearing plate 2 and the battery pack 8. The U-shaped reinforcing plate 4 is arranged at the corner of the horizontal part 302 and the vertical part 301, which plays the role of a reinforcing rib 5 to improve the connection strength.

[0064] The bottom plate of the U-shaped reinforcing plate 4, the horizontal part 302, and the horizontal bearing plate 2 are provided with a second bolt hole 201 penetrating in the vertical direction. The second bolt assembly 7 is installed in the second bolt hole 201.

[0065] The second bolt assembly 7 includes a second connecting bolt and a nut 701. A horizontal avoiding slot hole 103 is provided at the top of the stand plate 1 and corresponds to the position of the second bolt hole 201. The nut 701 is located in the avoiding slot hole 103 and is welded with the horizontal bearing plate 2. The center axis of the nut 701 is consistent with the center line of the second bolt hole 201. When it is necessary to connect and fix the L-shaped plate 3 with the horizontal bearing plate 2, only the second connecting bolt needs to be installed in the second bolt hole 201 and screwed with the nut 701.

[0066] The avoiding slot hole 103 can provide a welding space for the welded nut 701 and avoid interference with the head of the second connecting bolt.

[0067] In this embodiment, the U-shaped reinforcing plate 4 is designed as three.

[0068] The side support structure 10 further includes a vertical positioning reinforcing plate 6 having a positioning surface. One end of the stand plate 1 exceeds the horizontal bearing plate 2. At this end of the horizontal bearing plate 2, the side surface of the horizontal part 302 is flush with the side surface of the horizontal bearing plate 2. The positioning surface of the vertical positioning reinforcing plate 6 is attached to and welded with the end surface of the horizontal bearing plate 2. The side surface of the vertical positioning reinforcing plate 6 is attached to and welded with the side surface of the stand plate 1. The top of the vertical positioning reinforcing plate 6 exceeds the horizontal bearing plate 2 and is attached to and welded with the end surface of the L-shaped plate 3. The vertical positioning reinforcing plate 6 is not only welded with the stand plate 1 and the horizontal bearing plate 2, but also forms a block at the end of the horizontal part 302 of the L-shaped plate 3, which plays a role in preventing the L-shaped plate 3 from being installed out of position (i.e., preventing the L-shaped plate 3 from exceeding the horizontal bearing plate 2 when installed), thereby ensuring the positioning installation of the L-shaped plate 3.

[0069] The present scheme has the following advantages:

[0070] 1. Compact structure, maximum reduction of structural weight on the basis of ensuring function, greatly reducing material cost;

[0071] 2. The side support structure 10 is formed by sheet metal tailor welding, and is provided with positioning pin holes 102 to ensure installation accuracy, and is provided with an anti-overposition structure to ensure installation convenience.

[0072] 3. The vertical plate 1 and the horizontal bearing plate 2 are provided with multiple bolt holes, which can realize multi-point fixing, enhance the stability of the battery pack 8, and reduce the loosening or damage of the battery caused by bumps and vibrations during vehicle driving.

[0073] The battery pack fixing support structure includes the following steps during actual assembly:

[0074] Assemble the side support structure 10: Since the vertical plate 1, the horizontal bearing plate 2, the reinforcing rib 5, and the vertical positioning reinforcing plate 6 are fixed by welding, no assembly is required therebetween, only the horizontal part 302 of the L-shaped plate 3 is placed on the top surface of the horizontal bearing plate 2, and the end surface of the horizontal part 302 is abutted and tightly contacted with the end surface of the vertical positioning reinforcing plate 6, and then all the second connecting bolts are installed to position and assemble the L-shaped plate 3 and the vertical plate 1;

[0075] Position and install the side support structure 10 on the vehicle frame 9: the positioning pin holes 102 on the vertical plate 1 and the positioning pin holes 102 on the vehicle frame 9 are sequentially installed with positioning pins, and then multiple first connecting bolts 104 are installed to form the positioning and installation of the vertical plate 1 and the vehicle frame 9;

[0076] Fix the side support structure 10 and the battery pack 8: after the positioning and installation of the vertical plate 1 and the vehicle frame 9, the vertical part 301 of the L-shaped plate 3 is abutted with the outside of the battery pack 8, and then the vertical part 301 of the L-shaped plate 3 is welded and fixed with the battery pack 8;

[0077] According to the above steps, the side support structures 10 on both sides are installed respectively.

[0078] Example 2

[0079] A new energy tractor comprises the battery pack fixing support structure.

[0080] The technical scheme of the utility model has the advantages of:

[0081] In the application, the opposite sides of the battery pack 8 are respectively connected and fixed with the frame 9 through the side support structure 10, the bottom of the battery pack 8 is located in the mounting groove 901 of the frame 9 and there is a gap between the bottom of the battery pack 8 and the bottom of the mounting groove 901, which not only avoids the direct contact between the bottom of the battery pack 8 and the frame 9, avoids the vibration of the frame 9 directly conducting to the battery pack 8, reduces the risk of vibration failure of the battery pack 8, but also reduces the gravity position of the fixed battery pack 8, improves the stability of the battery pack 8, the reduced gravity center makes the vehicle more stable when driving at high speed or turning, reduces the roll angle, improves the anti-rollover ability of the vehicle, the battery pack fixing and supporting structure optimizes the layout of the battery pack 8, prevents the high-frequency vibration of the tractor operation from directly conducting to the battery pack 8, and reduces the risk of cell failure.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

[0083] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A battery pack fixing support structure characterized by, The application relates to a battery pack fixing support structure, which comprises a frame (9) and a battery pack (8), the frame (9) is provided with a mounting groove (901) for accommodating the battery pack (8), the bottom of the battery pack (8) is located in the mounting groove (901) of the frame (9), and a gap exists between the bottom of the battery pack (8) and the bottom of the mounting groove (901); the opposite sides of the battery pack (8) are respectively connected and fixed to the frame (9) through side support structures (10).

2. The battery pack fixation support structure according to claim 1, characterized by, The side support structure (10) comprises a lower connecting part and an upper connecting part arranged on the top of the lower connecting part, the lower connecting part is connected and fixed to the frame (9), and the upper connecting part is connected and fixed to the battery pack (8).

3. The battery pack fixation support structure according to claim 2, characterized by, The lower connecting part is a vertical plate (1), and the upper connecting part is a horizontal bearing plate (2), which is in T-shaped connection with the vertical section of the vertical plate (1).

4. The battery pack fixation support structure according to claim 3, characterized by, A plurality of first bolt holes (101) for connecting with the frame (9) are arranged on the vertical plate (1), and first connecting bolts (104) are arranged in the first bolt holes (101).

5. The battery pack fixation support structure according to claim 3, characterized by, A plurality of positioning pin holes (102) are arranged on the vertical plate (1) and the frame (9) respectively, the positioning pin holes (102) on the frame (9) are arranged in one-to-one correspondence with the positioning pin holes (102) on the vertical plate (1) and are provided with positioning pins.

6. The battery pack fixation support structure according to claim 3, characterized by, A plurality of reinforcing ribs (5) are arranged at the corners of the two sides of the vertical plate (1) and the horizontal bearing plate (2).

7. The battery pack fixation support structure according to claim 3, characterized by, The side support structure (10) further comprises an L-shaped plate (3), the L-shaped plate (3) is arranged on the top of the horizontal bearing plate (2), and the horizontal bearing plate (2) is connected and fixed to the battery pack (8) through the L-shaped plate (3).

8. The battery pack fixation support structure according to claim 7, characterized by, The L-shaped plate (3) comprises a horizontal part (302) and a vertical part (301), the horizontal part (302) is in close contact with and connected to the horizontal bearing plate (2), and the vertical part (301) is in close contact with and connected to the battery pack (8).

9. The battery pack fixation support structure according to claim 8, characterized by, A U-shaped reinforcing plate (4) is arranged on the top of the horizontal part (302), the bottom plate of the U-shaped reinforcing plate (4) is in close contact with and welded to the horizontal part (302), and the two side plates of the U-shaped reinforcing plate (4) are welded to the vertical part (301). The bottom plate of the U-shaped reinforcing plate (4), the horizontal part (302) and the horizontal bearing plate (2) are provided with a second bolt hole (201) penetrating in the vertical direction, and a bolt assembly (7) is arranged in the second bolt hole (201).

10. A new energy tractor, characterized in that, The application further discloses a battery pack fixing support structure comprising the battery pack fixing support structure according to any one of claims 1-9.

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