Integrated battery pack frame and heat dissipation device thereof

Abstract

The application discloses an integrated battery pack frame and a heat dissipation device thereof, and belongs to the technical field of battery pack frames. The battery pack frame comprises a main frame formed by four vertical columns and a plurality of connecting rods, and a plurality of detachable supports are arranged on the main frame, and reinforcing rods are connected between the plurality of horizontal rods. The heat dissipation device comprises a hinge mounting seat welded on the main frame, the hinge mounting seat is provided with an integrated heat radiator through a hinge mechanism, the integrated heat radiator is buckled with the main frame through a fastener on the side away from the hinge mounting seat, and the main frame is internally arranged with a battery pack. The integrated heat radiator is integrated on the main frame through the hinge mechanism, a structure of 'frame bearing battery and heat radiator hinged integration' is formed, the space required for independently arranging the integrated heat radiator is saved, and high-density integrated layout of the battery pack is facilitated. Through the hinge type opening and closing design of the integrated heat radiator, the integrated heat radiator does not need to be disassembled when maintenance is needed, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, specifically relating to an integrated battery pack frame and its heat dissipation device. Background Technology

[0002] With the accelerating electrification of construction machinery, pure electric hydraulic excavators are placing increasingly higher demands on the energy density and integration of their power batteries. To achieve sufficient range, as many battery packs as possible need to be placed on the limited platform of the excavator, which poses a severe challenge to the design of the battery pack's load-bearing frame, heat dissipation efficiency, and ease of maintenance.

[0003] Currently, battery pack frames for pure electric construction machinery mainly adopt box-type or distributed structures. For example, Chinese patent CN224311580U discloses a battery frame structure for pure electric construction machinery, which adopts a modular design, using the combination of upper and lower battery assemblies to meet different power requirements. While this solution improves the modularity of the frame to some extent, it does not address the integrated design of the heat sink and the frame; the heat sink and battery frame are arranged independently, occupying a large amount of space.

[0004] Regarding heat dissipation devices, the construction machinery industry already has technical solutions for mounting radiators to frames via hinges. For example, Chinese patent CN201784450U discloses a rotary-opening heat dissipation device where the torque converter radiator is movably mounted to the frame via hinges, with a water radiator, an air-to-air intercooler, and a hydraulic oil radiator located inside the frame opposite the torque converter radiator. When cleaning is required, the torque converter radiator is rotated open along the hinge, exposing the other radiators. However, this technical solution, applied to the engine cooling system of traditional construction machinery, addresses the maintenance and cleaning issues between multiple radiators and does not address the integration of battery pack support and heat dissipation.

[0005] In addition, there are technical solutions that apply hinges to battery frame covers. For example, Chinese patent CN216213841U discloses a battery pack frame, including a square frame and a battery pack cover. One end of the battery pack cover is hinged to one side of the square frame, and the other end is locked to the square frame. In this solution, the hinged object is the battery pack cover, and its opening and closing is for the purpose of removing and placing batteries, rather than providing a passage for maintenance. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated battery pack frame and its heat dissipation device, addressing the defects and deficiencies described in the background art.

[0007] The technical solution of the present invention: An integrated battery pack frame includes a main frame formed by four columns and several connecting rods. Several detachable brackets are provided on the main frame, and reinforcing rods are connected between several crossbars.

[0008] The main frame is a box-type frame structure.

[0009] The top of the column is equipped with a lifting ring.

[0010] Several shock absorbers are installed at the bottom of the main frame.

[0011] The detachable bracket includes a crossbar and L-shaped curved plates at both ends of the crossbar.

[0012] The L-shaped bend plate is provided with threaded holes, and the L-shaped bend plate is connected to the column by bolts.

[0013] The crossbar is also provided with a connecting plate, and the connecting plate is provided with connecting screw holes for installing the reinforcing bar.

[0014] A heat dissipation device based on an integrated battery pack frame includes a hinge mounting base welded to the main frame, an integrated heat sink mounted on the hinge mounting base via a hinge mechanism, and the side of the integrated heat sink away from the hinge mounting base being fastened to the main frame via a fastener, with a battery pack arranged inside the main frame.

[0015] At least two battery packs are arranged sequentially along the length of the main frame.

[0016] The integrated heat sink includes a housing and an electronic fan embedded inside the housing. One side of the housing is hinged to the main frame via a hinge mechanism and a hinge mounting base, and the other side is fastened to the main frame via fasteners.

[0017] The beneficial effects of this invention are: This invention integrates an integrated heat sink onto the main frame via a hinge mechanism, forming a structure where the frame supports the battery and the heat sink is hinged together. This saves the space required for independently placing the integrated heat sink and facilitates a high-density integrated layout of the battery pack. The hinged opening and closing design of the integrated heat sink eliminates the need to disassemble it for maintenance. Simply rotating the integrated heat sink along the hinge mechanism quickly exposes the sides of the battery pack and the internal space of the integrated heat sink, significantly improving maintenance convenience and efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main framework of the present invention; Figure 2 This is a schematic diagram of the detachable bracket of the present invention; Figure 3This is an assembly diagram of the battery pack of the present invention mounted on the main frame; Figure 4 This is a schematic diagram of the overall structure of the integrated battery pack frame of the present invention; Figure 5 This is a three-dimensional structural diagram of the main frame of the present invention in a closed state; Figure 6 This is a three-dimensional structural diagram of the main frame of the present invention in the open state.

[0019] Reference numerals: 1-Battery pack, 2-Main frame, 3-Hinge mechanism, 4-Integrated heat sink, 5-Column, 6-Connecting rod, 7-Hanging ring, 8-Shock absorber, 9-Hinge mounting base, 10-Removable bracket, 11-L-shaped bent plate, 12-Threaded hole, 13-Crossbar, 14-Reinforcing rod, 15-Fastener, 16-Housing, 17-Electric fan, 18-Connecting plate, 19-Connecting screw hole. Detailed Implementation

[0020] Example 1 refer to Figures 1-6 An integrated battery pack frame includes a main frame 2 formed by four uprights 5 and several connecting rods 6. Several detachable brackets 10 are provided on the main frame 2, and several crossbars 13 are connected by reinforcing rods 14.

[0021] The main frame 2 is a box-type frame structure.

[0022] The top of the column 5 is provided with a lifting ring 7 for the overall hoisting of the integrated battery pack frame of this application.

[0023] The bottom of the main frame 2 is provided with several shock absorbers 8 for mounting the main frame 2 on the excavator platform. In this application, the shock absorbers 8 are symmetrically arranged along the left and right sides of the main frame 2.

[0024] The detachable bracket 10 includes a crossbar 13 and L-shaped curved plates 11 disposed at both ends of the crossbar 13.

[0025] The L-shaped bent plate 11 is provided with threaded holes 12, and the L-shaped bent plate 11 is connected to the column 5 by bolts. It is used to connect to the main frame 2 by bolts. The design of the detachable bracket 10 makes the installation and removal of the battery pack 1 more flexible and convenient.

[0026] The crossbar 13 is also provided with a connecting plate 18, and the connecting plate 18 is provided with connecting screw holes 19 for installing the reinforcing rod 14.

[0027] This application discloses a heat dissipation device based on an integrated battery pack frame, including a hinge mounting base 9 welded on the main frame 2. An integrated heat sink 4 is mounted on the hinge mounting base 9 through a hinge mechanism 3. The side of the integrated heat sink 4 away from the hinge mounting base 9 is fastened to the main frame 2 through a fastener 15. A battery pack 1 is arranged inside the main frame 2.

[0028] This application discloses a heat dissipation device based on an integrated battery pack frame, mainly used in pure electric excavators.

[0029] In this application, the integrated radiator 4 has a closed state and an open state relative to the main frame 2. In the closed state, the integrated radiator 4 is fastened to the main frame 2 by fastener 15. In the open state, the integrated radiator 4 rotates outward around the hinge mechanism 3 to open, exposing the side of the battery pack 1 and the working space inside the integrated radiator 4, so as to facilitate maintenance.

[0030] At least two battery packs 1 are arranged sequentially along the length of the main frame 2.

[0031] The integrated heat sink 4 includes a housing 16 and an electronic fan 17 embedded inside the housing 16. One side of the housing 16 is hinged to the main frame 2 via a hinge mechanism 3 and a hinge mounting base 9, and the other side is fastened to the main frame 2 via a fastener 15.

[0032] In this application, the heat dissipation principle of the heat dissipation device is as follows: When using the pure electric excavator in normal operating condition, the specific steps are as follows: when the pure electric excavator is in normal operating condition, keep the integrated radiator 4 in the closed state, fix the integrated radiator 4 to the main frame 2 with bolts, and start the electric fan 17 to dissipate heat from the battery pack 1. When inspecting or repairing battery pack 1 or integrated heat sink 4, the operating procedures are as follows: S1: When it is necessary to inspect the battery pack 1 or the integrated radiator 4, open the fastener 15 on the side of the integrated radiator 4 away from the hinge mechanism 3, push or pull the radiator, so that the integrated radiator 4 rotates outward around the hinge mechanism 3 to open to a predetermined angle, exposing the side of the battery pack 1 and the working space inside the integrated radiator 4. S2: Perform maintenance on the battery pack 1 or the integrated radiator 4. After maintenance, rotate the integrated radiator 4 back to the closed position around the hinge mechanism 3 and re-fasten the fastener 15 to fix the integrated radiator 4 on the main frame 2.

[0033] Example 2 refer to Figure 1The column 5 is preferably a 50×50×5 square tube, and the connecting rod 6 and crossbar 13 are preferably rectangular tubes of 50×25×3. The main frame 2 is formed by welding the column 5 and the connecting rod 6 together. The 50×50×5 square tube has good structural strength and torsional stiffness, which can stably support the weight of multiple battery packs. At the same time, by utilizing its hollow cross section, the overall weight can be effectively controlled while ensuring sufficient load-bearing capacity. It is very suitable as a load-bearing structural component for the battery pack frame on engineering machinery (such as excavators). Combined with the welded combination of 50×25×3 rectangular tubes, a lightweight and sturdy box-type frame structure can be formed.

[0034] In this application, the external dimensions of the main frame 2 are 1250mm × 719.5mm × 870mm. Four lifting rings 7 are welded to each of the four points at the front and rear of the top of the main frame 2, symmetrically distributed, for hoisting the integrated battery pack frame of this application as a whole during installation or disassembly. Two hinge mounting seats 9 are welded to the surface of the main frame 2 for mounting the subsequent hinge mechanism 3.

[0035] refer to Figure 2 The detachable bracket 10 is mainly constructed by welding a 50×25×3 crossbar 13 and an L-shaped bent plate 11. The L-shaped bent plate 11 has threaded holes 12 for connecting to the main frame 2 with bolts. The design of the detachable bracket 10 makes the installation and removal of the battery pack 1 more flexible and convenient.

[0036] refer to Figure 3 The main frame 2 is mounted on the excavator platform using shock absorbers 8. Six shock absorbers 8 are symmetrically arranged on both sides of the center of the main frame 2 to absorb vibrations generated during excavator operation and protect the battery pack 1 from impact damage. The battery pack 1 is installed inside the main frame 2 and fixed to it using detachable brackets 10 and bolts. Four battery packs 1 are arranged sequentially along the length of the main frame 2 to achieve high-density integration.

[0037] refer to Figure 4 The integrated radiator 4 is mounted on the hinge mounting base 9 of the main frame 2 via the hinge mechanism 3. The side of the integrated radiator 4 away from the hinge mechanism 3 is fixedly connected to the main frame 2 via fastener 15, so that the integrated radiator 4 remains stable under normal working conditions.

[0038] By unfastening the fastener 15 of the integrated radiator 4, the integrated radiator 4 can be rotated outward around the hinge mechanism 3 to open, thus switching from the closed state to the open state.

[0039] refer to Figure 5 In the closed state, the integrated heat sink 4 is fixed to the battery pack 1 frame as one piece, and the electronic fan 17 works normally to provide forced air cooling for the battery pack 1.

[0040] refer to Figure 6 In the open state, the integrated radiator 4 flips outwards, fully exposing the side of the battery pack 1 and the working space inside the integrated radiator 4. Maintenance personnel can inspect, clean, and maintain the battery pack 1 and the interior of the integrated radiator 4 without disassembling them. After maintenance, the integrated radiator 4 is rotated back to the closed position and re-fastened to the main frame 2 using fastener 15.

[0041] When the pure electric excavator is operating normally, the integrated radiator 4 is in a closed state and is fixedly connected to the main frame 2 by bolts. The electric fan 17 operates, introducing external cold air into the integrated radiator 4 to provide forced air cooling for the battery pack 1, ensuring that the battery pack 1 operates within a suitable temperature range.

[0042] When maintenance or repair of the battery pack 1 or integrated heat sink 4 is required, first loosen the fastener 15 on the side of the integrated heat sink 4 away from the hinge mechanism 3, and then push or pull the integrated heat sink 4 to rotate it outward around the hinge mechanism 3 to a predetermined angle. At this time, the side of the battery pack 1 and the interior of the integrated heat sink 4 are fully exposed, allowing maintenance personnel to easily perform operations such as checking the condition of the battery pack 1, repairing wiring, and cleaning the heat sink.

[0043] After the maintenance is completed, rotate the integrated radiator 4 back to the closed position around the hinge mechanism 3, reinstall the fixing bolts, and re-fasten the integrated radiator 4 to the main frame 2 through the fastener 15, so that the integrated radiator 4 is fixed on the main frame 2.

[0044] This invention integrates the integrated heat sink 4 onto the main frame 2 via a hinge mechanism 3, forming a structure where the frame supports the battery and the heat sink is hinged together. This saves the space required for independently arranging the integrated heat sink 4 and facilitates a high-density integrated layout of the battery pack 1. Through the hinged opening and closing design of the integrated heat sink 4, maintenance is possible without disassembling it. Simply rotating the integrated heat sink 4 along the hinge mechanism 3 quickly exposes the side of the battery pack 1 and the internal space of the integrated heat sink 4, significantly improving maintenance convenience and efficiency.

[0045] Compared to existing technologies where hinge mechanisms are only used in a single scenario between radiators or between a cover and a frame, this invention expands the hinged radiator from the traditional scenario of "cleaning the radiator" to a new scenario of "providing a passage for the maintenance of battery pack 1", realizing the radiator's "dual function" - efficient heat dissipation during normal operation and rotation to make way during maintenance.

Claims

1. An integrated battery pack frame, characterized in that... It includes a main frame (2) formed by connecting four columns (5) and several connecting rods (6), and several detachable brackets (10) are provided on the main frame (2), and several crossbars (13) are connected by reinforcing rods (14).

2. The integrated battery pack frame according to claim 1, characterized in that: The main frame (2) is a box-type frame structure.

3. The integrated battery pack frame according to claim 1, characterized in that: The top of the column (5) is provided with a lifting ring (7).

4. The integrated battery pack frame according to claim 1, characterized in that: Several shock absorbers (8) are provided at the bottom of the main frame (2).

5. The integrated battery pack frame according to claim 1, characterized in that: The detachable bracket (10) includes a crossbar (13) and L-shaped curved plates (11) disposed at both ends of the crossbar (13).

6. The integrated battery pack frame according to claim 5, characterized in that: The L-shaped bend plate (11) is provided with threaded holes (12), and the L-shaped bend plate (11) is connected to the column (5) by bolts.

7. The integrated battery pack frame according to claim 5, characterized in that: The crossbar (13) is also provided with a connecting plate (18), and the connecting plate (18) is provided with connecting screw holes (19) for installing the reinforcing rod (14).

8. A heat dissipation device based on the integrated battery pack frame according to any one of claims 1-7, characterized in that: The main frame (2) includes a hinge mounting base (9) welded on it. The hinge mounting base (9) is equipped with an integrated heat sink (4) through a hinge mechanism (3). The integrated heat sink (4) is fastened to the main frame (2) on the side away from the hinge mounting base (9) by a fastener (15). A battery pack (1) is arranged inside the main frame (2).

9. The heat dissipation device for the integrated battery pack frame according to claim 8, characterized in that: At least two battery packs (1) are arranged sequentially along the length of the main frame (2).

10. The heat dissipation device for the integrated battery pack frame according to claim 8, characterized in that: The integrated heat sink (4) includes a housing (16) and an electronic fan (17) embedded inside the housing (16). One side of the housing (16) is hinged to the main frame (2) by a hinge mechanism (3) and a hinge mounting base (9), and the other side is fastened to the main frame (2) by a fastener (15).

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