Power battery box assembly, power battery box mounting assembly and new energy mine car

Abstract

The utility model discloses a power battery box assembly, a power battery box mounting assembly and a new energy mine car. The power battery box assembly comprises a battery box frame, a battery box baffle and a battery box upper cover plate, the battery box frame is used for containing a plurality of battery packs; the battery box baffles are respectively mounted on the front, rear, left and right side surfaces of the battery box frame; the battery box upper cover plate is mounted on the top surface of the battery box frame; at least one opening is formed in the battery box baffle, one opening corresponds to one large-capacity battery pack and is used for providing a space protruding out of the battery box frame for the large-capacity battery pack, the part, protruding out of the battery box frame, of the large-capacity battery pack is packaged through the battery protection shell, and the battery protection shell is connected to the battery box baffle. According to the utility model, the use of a battery box bracket is avoided on the original basis, the weight is reduced, the structure of the battery box is optimized, so that the overall strength of the battery box can still meet the bearing requirement of a high-capacity battery pack, and the weight energy density and the volume energy density of integration of a plurality of battery packs are increased.

Description

Technical Field

[0001] The utility model relates to a power battery box assembly, belonging to the technical field of power battery boxes of new energy mining vehicles. Background Art

[0002] As an energy-saving and low-carbon engineering machinery, new energy pure electric mining cars are increasingly widely used in the mining field. Their harsh working environment has posed challenges to various technical indicators of new energy mining cars. In order to improve the working performance of new energy mining cars and increase their working time, it is necessary to increase the battery capacity and reduce the overall weight of the vehicle body within its limited space, that is, to increase its weight energy density and volume energy density. At present, new energy mining cars mostly use the bracket and battery box assembly to load the battery pack, use a high-strength bracket and the frame for rigid connection, install the battery box assembly on the horizontal platform provided by the bracket, and install shock absorbers at the bottom of the battery box and on the side of the battery box close to the frame. Although this method has certain reliability, it also causes a waste of space to a certain extent, and there is also a certain room for optimization in terms of overall weight. Summary of the invention

[0003] In order to solve the above problems, the utility model proposes a battery box assembly that is directly connected to the frame of a new energy mining car. On the original basis, it avoids the use of a battery box bracket, reduces weight, and optimizes the battery box structure so that its overall strength can still meet the load-bearing requirements of a large-capacity battery pack, thereby increasing the integrated weight energy density and volume energy density of multiple battery packs.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In a first aspect, the utility model provides a power battery box assembly, comprising:

[0006] Battery box frame, used to hold multiple battery packs;

[0007] The battery box baffles are respectively mounted on the front, rear, left and right sides of the battery box frame;

[0008] A battery box upper cover plate, mounted on the top surface of the battery box frame;

[0009] At least one opening is provided on the battery box baffle, and one opening corresponds to a large-capacity battery pack, which is used to provide a space for the large-capacity battery pack to protrude from the battery box frame. The part of the large-capacity battery pack protruding from the battery box frame is encapsulated by a battery protective shell, and the battery protective shell is connected to the battery box baffle.

[0010] In some embodiments, the battery box baffle with the opening is provided with a plurality of mounting holes near the vertical beam of the battery box frame for bolt connection with the vehicle frame.

[0011] In some embodiments, a plurality of fixing threaded holes are provided around the opening, and mounting holes corresponding to the fixing threaded holes are provided around the battery protective shell. The battery protective shell is mounted on a battery box baffle located at the opening by bolts, and the contour of the battery protective shell is adapted to the portion of the large-capacity battery pack protruding from the battery box frame.

[0012] In some embodiments, the battery box baffle with the opening is provided with at least one wire threading groove for passing the high and low voltage lines of the battery pack. When the threading is completed, the wire threading groove is blocked by a sealing plate.

[0013] In some embodiments, it also includes:

[0014] The battery box anti-collision frame is installed on the battery box baffle plate arranged opposite to the battery box baffle plate provided with the opening to prevent collision with external objects.

[0015] In some embodiments, the battery box anti-collision frame is welded by multiple cross beams and multiple longitudinal beams; the battery box anti-collision frame is fixed with multiple anti-collision frame mounting pads on the side facing the battery box baffle, the anti-collision frame mounting pads are provided with threaded holes, the battery box baffle is provided with mounting holes corresponding to the threaded holes, and the battery box anti-collision frame is fixed to the battery box baffle by bolts.

[0016] In some embodiments, the cross beam and the longitudinal beam are both U-shaped plates, and the opening surfaces of all U-shaped plates face the battery box baffle. Reinforcing plates are welded at the end openings of some U-shaped plates to enhance the strength of the anti-collision frame and prevent external debris from entering the U-shaped groove.

[0017] In some embodiments, at least one window is provided on the battery box baffle which is arranged opposite to the battery box baffle with the opening, which is used to facilitate the insertion and removal of the maintenance switch during vehicle maintenance. Mounting holes are provided around the window, and the maintenance window baffle is installed on the battery box baffle located at the window by bolts.

[0018] In some embodiments, the battery box baffle with the opening is connected and fixed to the battery box frame by welding; the battery box baffle arranged opposite to the battery box baffle with the opening, the battery box baffle facing the front, the battery box baffle facing the rear and the battery box upper cover are all connected and fixed to the battery box frame by bolts.

[0019] In the second aspect, the utility model provides a power battery box installation assembly, including two of the above-mentioned power battery box assemblies and two reinforced connecting rods; the two power battery box assemblies are suspended on both sides of the frame by bolt connection, and the two reinforced connecting rods are installed at the bottom position between the two power battery box assemblies by bolt connection.

[0020] In a third aspect, the utility model provides a new energy mining car, which is equipped with the above-mentioned power battery box assembly; or, is equipped with the above-mentioned power battery box installation assembly.

[0021] Beneficial effects of the utility model:

[0022] 1. The battery box assembly is directly distributed and suspended on both sides of the frame through bolt connection. Compared with the original structure, the use of battery box brackets is avoided, reducing the weight of the assembly while ensuring strength. Two reinforcing connecting rods are set at the bottom between the two battery box assemblies to enhance the vibration resistance of the inner side of the suspended battery box and prevent stress concentration in the contact area between the battery box and the frame.

[0023] 2. A structure for expanding the internal volume of the battery box assembly is added to the inner side of the battery box with a higher safety factor. This allows a larger battery pack to be placed on the bottom part of the battery box while ensuring the strength of the box, thereby increasing the overall volume energy density and weight energy density of the battery box.

[0024] 3. The outer baffle is equipped with a maintenance switch plug-in window to facilitate vehicle maintenance operations; the outer baffle is equipped with an anti-collision frame, which can enhance the supporting strength of the battery box while preventing collision with large external objects, protecting the internal structure and improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0026] In the attached picture:

[0027] Figure 1 This is a schematic diagram of the overall installation of the battery box assembly of the utility model;

[0028] Figure 2 This is an exploded diagram of the overall components of the battery box of the utility model;

[0029] Figure 3 This is a schematic diagram of the inner side plate of the battery box of the utility model;

[0030] Figure 4This is a schematic diagram of the installation of the battery protection shell of the utility model;

[0031] Figure 5 This is a schematic diagram of the outer baffle of the battery box of the utility model;

[0032] Figure 6 It is a schematic diagram of the battery box anti-collision frame of the utility model.

[0033] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 2 As shown, the utility model provides a power battery box assembly 101, which mainly includes a reinforcing rod connecting seat 201, a battery protection shell 202, an inner baffle plate 203 of the battery box, a battery box frame 204, a small-capacity battery pack 205, a large-capacity battery pack 206, a battery box front baffle plate 207, a battery box rear baffle plate 208, a battery box upper cover plate 209, a battery box outer baffle plate 210, an anti-collision frame mounting pad 211, a battery box anti-collision frame 212, and an inspection window baffle plate 213.

[0038] The specific structures and connection relationships of the above components are further described below.

[0039] like Figure 1 As shown, the reinforcing rod connection seat 201 is fixed to the inner baffle plate 203 of the battery box by welding, wherein a plurality of reinforcing ribs are used to enhance the strength of the welding point and reduce stress concentration at the connection point. Specifically, a reinforcing rod connection seat 201 is welded at each of the two ends of the lower part of the inner baffle plate 203 of the battery box.

[0040] Continue to refer to Figure 1 , Figure 2 As shown, the battery box front baffle 207, the battery box rear baffle 208, the battery box upper cover 209 and the battery box outer baffle 210 are all connected to the battery box frame 204 by bolts, and all three are made of thinner steel plates to reduce the weight of the assembly.

[0041] The inner baffle plate 203 of the battery box is connected and fixed to the battery box frame 204 by welding, and has a greater thickness than the battery box upper cover plate 209, the battery box front baffle plate 207, the battery box rear baffle plate 208 and the battery box outer baffle plate 210, so as to meet the supporting strength of the entire power battery box assembly 101 when it is suspended on the vehicle frame through the inner baffle plate 203 of the battery box.

[0042] It should be noted that when the power battery box assembly 101 is installed, sealing rubber pads and battery box insulation cotton are installed between each baffle and the battery box frame 204, which play the role of waterproof and dustproof and heat preservation respectively.

[0043] like Figure 3 As shown, the inner baffle plate 203 of the battery box is provided with multiple groups of mounting holes 301 near the vertical beam of the battery box frame 204, which are used for bolt connection with the vehicle frame, wherein the bolts bear the entire weight of the battery box and the inertial force in the vertical direction during driving, so the number of bolts must be determined through simulation to ensure that the bolt group can withstand sufficient shear force. The lower part of the inner baffle plate 203 of the battery box is provided with three openings 302, which are used to provide a space for the large-capacity battery pack 206 to protrude from the battery box frame 204. The part of the large-capacity battery pack 206 protruding from the battery box frame 204 is encapsulated by the battery protective shell 202, and the battery protective shell 202 is connected to the inner baffle plate 203 of the battery box, and multiple groups of fixing threaded holes 303 are provided around the opening 302.

[0044] As a further solution, three wire threading grooves are provided on the top of the inner baffle 203 of the battery box for passing the high and low voltage lines of the battery pack. After the wire threading is completed, the wire threading grooves are blocked by sealing plates.

[0045] like Figure 4As shown, three battery protection shells 202 are connected to the inner baffle 203 of the battery box by bolts, and are surrounded by mounting holes 401. Since they are located at the bottom inner side of the vehicle, they are not easily hit by heavy objects. They mainly prevent foreign objects from entering the battery box and withstand the impact of mud and rocks splashing from the bottom of the vehicle. Therefore, the battery protection shell 202 is made of thinner steel to reduce the weight of the assembly.

[0046] The contour of the battery protective shell 202 matches the portion of the large-capacity battery pack 206 that protrudes from the battery box frame 204, leaving an appropriate gap. In order to ensure the stability of the installation of the large-capacity battery pack 206 in the power battery box assembly 101, it is not easy to protrude too much from the battery box frame 204.

[0047] It should be noted that the number of large-capacity battery packs placed is not fixed. If the strength of the battery box meets the requirements, the middle battery pack can still be changed to a large-capacity battery pack, and the above-mentioned protruding structure can be set in the corresponding place, which can further optimize the weight energy density and volume energy density of the battery box.

[0048] like Figure 5 As shown, the outer baffle plate 210 of the battery box is composed of three parts for easy installation. There are multiple windows 501 for convenient plugging and unplugging of maintenance switches during vehicle maintenance. When the battery box is installed, the maintenance window baffle plate 213 is connected to the outer baffle plate 210 of the battery box by bolts for easy disassembly. Holes 502 for installing the maintenance window baffle plate 213 are provided around the window 501, and holes 503 around the baffle plate are used to install the outer baffle plate 210 of the battery box on the battery box frame 204.

[0049] It should be noted that the arrangement positions and numbers of the inspection windows can be determined according to actual conditions and are not limited to the above embodiments.

[0050] like Figure 6 As shown, the battery box anti-collision frame 212 is installed on the outer baffle 210 of the battery box. While enhancing the supporting strength of the battery box, it can prevent collision with large external objects, protect the internal structure and improve safety performance.

[0051] The preferred solution is to continue to refer to Figure 6 As shown, the battery box anti-collision frame 212 is welded by multiple cross beams and multiple longitudinal beams; the battery box anti-collision frame 212 is fixed with multiple anti-collision frame mounting pads 211 on the side facing the outer baffle plate 210 of the battery box, the anti-collision frame mounting pads 211 are provided with threaded holes, the outer baffle plate 210 of the battery box is provided with mounting holes corresponding to the threaded holes, and the battery box anti-collision frame 212 is fixed to the outer baffle plate 210 of the battery box by bolts.

[0052] For further solutions, please refer to Figure 6As shown, both the cross beam and the longitudinal beam are U-shaped plates, and the opening surfaces of all U-shaped plates face the outer baffle 210 of the battery box. Reinforcement plates 601 are welded at the end openings of some U-shaped plates to improve the strength of the anti-collision frame and prevent external debris from entering the U-shaped groove.

[0053] like Figure 1 As shown, the utility model also provides a power battery box installation assembly 100, including two power battery box assemblies 101 and two reinforcing connecting rods 102; wherein the two power battery box assemblies 101 are directly suspended on both sides of the frame by bolt connection, and the connection between the power battery box assembly 101 and the frame is as shown in FIG. Figure 1 two reinforcing connecting rods 102 are bolted to the bottom position between the two power battery box assemblies 101 to increase the bottom support, enhance the lateral vibration resistance, and ultimately avoid the use of the battery box bracket and reduce the weight of the assembly.

[0054] The utility model also provides a new energy mining car, which is equipped with the above-mentioned power battery box assembly; or, is equipped with the above-mentioned power battery box installation assembly.

[0055] In summary, the battery box assembly is directly distributed and suspended on both sides of the frame through bolt connections. Compared with the original structure, the use of battery box brackets is avoided, reducing the weight of the assembly while ensuring strength. Two reinforcing connecting rods are provided at the bottom between the two battery box assemblies to enhance the vibration resistance of the inner side of the suspended battery box and prevent stress concentration in the contact area between the battery box and the frame. On the inside of the battery box with a higher safety factor, a structure for expanding the internal volume of the battery box assembly is added, which can ensure the strength of the box while placing a larger battery pack on the bottom part of the battery box, thereby increasing the overall volume energy density and weight energy density of the battery box. The outer baffle is provided with a maintenance switch plug-in window to facilitate vehicle maintenance operations; the outer baffle is provided with an anti-collision frame, which can prevent collisions with large external objects while enhancing the supporting strength of the battery box, protecting the internal structure and improving safety performance.

[0056] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0057] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0058] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A power battery box assembly, characterized in that: include: Battery box frame, used to hold multiple battery packs; The battery box baffles are respectively mounted on the front, rear, left and right sides of the battery box frame; A battery box upper cover plate, mounted on the top surface of the battery box frame; At least one opening is provided on the battery box baffle, and one opening corresponds to a large-capacity battery pack, which is used to provide a space for the large-capacity battery pack to protrude from the battery box frame. The part of the large-capacity battery pack protruding from the battery box frame is encapsulated by a battery protective shell, and the battery protective shell is connected to the battery box baffle.

2. A power battery box assembly according to claim 1, characterized in that: The battery box baffle with the opening is provided with a plurality of mounting holes near the vertical beam of the battery box frame for bolt connection with the vehicle frame.

3. A power battery box assembly according to claim 1, characterized in that: A plurality of fixing threaded holes are provided around the opening, and mounting holes corresponding to the fixing threaded holes are provided around the battery protective shell. The battery protective shell is mounted on the battery box baffle at the opening by bolts, and the contour of the battery protective shell is adapted to the portion of the large-capacity battery pack protruding from the battery box frame.

4. A power battery box assembly according to claim 1, characterized in that: The battery box baffle with the opening is provided with at least one threading groove for passing the high and low voltage lines of the battery pack. When the threading is completed, the threading groove is blocked by a sealing plate.

5. The power battery box assembly according to claim 1, characterized in that: Also includes: The battery box anti-collision frame is installed on the battery box baffle plate arranged opposite to the battery box baffle plate provided with the opening to prevent collision with external objects.

6. A power battery box assembly according to claim 5, characterized in that: The battery box anti-collision frame is welded by multiple cross beams and multiple longitudinal beams; The battery box anti-collision frame is fixed with multiple anti-collision frame mounting pads on a side facing the battery box baffle, the anti-collision frame mounting pads are provided with threaded holes, the battery box baffle is provided with mounting holes corresponding to the threaded holes, and the battery box anti-collision frame is fixed to the battery box baffle by bolts.

7. A power battery box assembly according to claim 6, characterized in that: The cross beam and the longitudinal beam are both U-shaped plates, and the opening surfaces of all U-shaped plates face the battery box baffle. Reinforcement plates are welded at the end openings of some U-shaped plates to improve the strength of the anti-collision frame and prevent external debris from entering the U-shaped groove.

8. The power battery box assembly according to claim 1, characterized in that: At least one window is provided on the battery box baffle which is arranged opposite to the battery box baffle with the opening, which is used to facilitate the insertion and removal of the maintenance switch during vehicle maintenance. Mounting holes are provided around the window, and the maintenance window baffle is installed on the battery box baffle located at the window by bolts.

9. A power battery box assembly according to claim 1, characterized in that: The battery box baffle with the opening is connected and fixed to the battery box frame by welding; the battery box baffle arranged opposite to the battery box baffle with the opening, the battery box baffle facing the front, the battery box baffle facing the rear and the battery box upper cover are all connected and fixed to the battery box frame by bolts.

10. A power battery box installation assembly, characterized in that: Comprising two power battery box assemblies according to any one of claims 1 to 9 and two reinforcing connecting rods; The two power battery box assemblies are suspended on both sides of the vehicle frame through bolt connection, and the two reinforcing connecting rods are installed at the bottom position between the two power battery box assemblies through bolt connection.

11. A new energy mining car, characterized in that: A power battery box assembly according to any one of claims 1 to 9 is installed; or a power battery box installation assembly according to claim 10 is installed.

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