Battery pack box body structure of non-road vehicle

Abstract

The utility model relates to the technical field of battery packs, in particular to a non-road vehicle battery pack box body structure which comprises a box body and a top cover which can be mutually buckled to form a battery cell module installation cavity, the box body comprises a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are mutually symmetrical, and a water inlet assembly and a water outlet assembly are arranged on the first side plate; the second side plate is provided with a wire harness maintenance groove and is sealed through a wire harness maintenance plate corresponding to the wire harness maintenance groove. A battery cell module mounting position is arranged on the surface of the bottom plate, a welding gasket is arranged on the battery cell module mounting position and is used for lifting the bottom of the battery cell module to form a heating film mounting space, and the heating film mounting space is used for arranging a heating film. According to the scheme, the problems that in the prior art, different battery box bodies are independently arranged for different types of non-road vehicles, so that the development cost is high, and battery pack box bodies of cross-type non-road vehicles cannot be shared can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery pack housing structure for off-road vehicles. Background Technology

[0002] Non-road vehicles (non-road mobile machinery) refer to motor vehicles or machinery that are not primarily intended for road use. This includes various types of equipment such as tractors, combine harvesters, wheel loaders, backhoe loaders, tracked loaders, excavators, bulldozers, aerial work platforms, telescopic forklifts, and mining dump trucks. The power battery pack is a key component of the power system that provides power to non-road mobile machinery (such as construction machinery, agricultural machinery, and industrial vehicles). It is an energy storage device specifically designed for non-road mobile machinery to replace traditional internal combustion engines and provide power to the equipment.

[0003] Because different types of off-road vehicles have different uses and performance requirements, their power systems and component designs vary greatly. For example, power system components used in small, manually operated forklifts cannot be directly applied to large excavators because their working principles and performance requirements are different. In other words, different types of off-road vehicles require different amounts of power, which, in the context of battery packs, translates to a difference in the number of battery cells that make up the battery cell modules.

[0004] In addition, some special off-road vehicles require the installation of liquid cooling plates on the battery cell modules to dissipate heat; while other special off-road vehicles require the installation of heating films on the battery cell modules to enable them to operate in low-temperature environments.

[0005] Currently, battery pack designs for off-road vehicles are tailored to different types of vehicles, such as battery packs with liquid cooling or battery packs with heating film, which increases the development cost of battery packs in the off-road vehicle industry.

[0006] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to overcome the problems of the prior art and provide a battery pack housing structure for off-road vehicles. This solves the technical problem that the prior art requires different battery packs for different types of off-road vehicles, such as battery packs with liquid cooling or battery packs with heating film functions, which increases the development cost of battery packs in the off-road vehicle industry.

[0008] The above objectives are achieved through the following technical solutions:

[0009] A battery pack housing structure for off-road vehicles includes a housing and a top cover that can be interlocked to form a cell module mounting cavity. The housing includes a bottom plate and a first side plate and a second side plate that are symmetrical to each other. The first side plate is provided with a water inlet component and a water outlet component. The second side plate has a wire harness maintenance groove and is sealed by a corresponding wire harness maintenance plate. The surface of the bottom plate is provided with a cell module mounting position, and a welding gasket is provided on the cell module mounting position to raise the bottom of the cell module and form a heating film mounting space for mounting a heating film.

[0010] Furthermore, the water inlet assembly includes an outwardly protruding water inlet sleeve that can form a hidden cavity for the liquid cooling plate water inlet connector, and the water inlet sleeve is provided with a water inlet sleeve hole for the liquid cooling plate water inlet connector to extend out; the water outlet assembly includes an outwardly protruding water outlet sleeve that can form a hidden cavity for the liquid cooling plate water outlet connector, and the water outlet sleeve is provided with a water outlet sleeve hole for the liquid cooling plate water outlet connector to extend out.

[0011] Furthermore, a support frame with an outline corresponding to the wire harness maintenance slot is provided on the outside of the wire harness maintenance slot, and the wire harness maintenance plate is connected to the support frame by wire harness plate screws.

[0012] Furthermore, a plurality of press-fit nut posts are provided on the second side plate corresponding to the wire harness maintenance slot, and the support frame is provided with nut post sleeve holes that can be fitted onto the press-fit nut posts. The wire harness maintenance plate is provided with wire harness plate screw holes corresponding to the positions of the nut post sleeve holes, and the wire harness plate screws are screwed onto the press-fit nut posts after passing through the wire harness plate screw holes.

[0013] Furthermore, there are two wire harness inspection slots, which are arranged laterally on the second side plate; there are also two corresponding wire harness inspection plates.

[0014] Furthermore, a vertical second side plate outer reinforcing rib is provided on the outer wall of the second side plate corresponding to the two wire harness inspection slots.

[0015] Furthermore, the battery cell module mounting position includes a plurality of battery cell module mounting positions, and each battery cell module mounting position is provided with a welding pad that can respectively raise the left and right sides of the front and rear end plates of the battery cell module.

[0016] Furthermore, the two adjacent welding pads between two adjacent battery cell module mounting positions are a single unit.

[0017] Furthermore, at the same battery cell module mounting position, a battery cell module end plate guide post is also provided between two welding pads located at the same end, which can guide the guide post grooves opened at the bottom of the front and rear end covers of the battery cell module.

[0018] Furthermore, the top cover is also provided with a high-voltage box housing with a raised line, and is equipped with a corresponding high-voltage box cover.

[0019] This utility model provides a battery pack housing structure for off-road vehicles, integrating common off-road vehicle battery pack functions such as liquid cooling plate heat dissipation, heating film heating, and maintenance without removing the entire cell module into one unit. Therefore, it can serve as the battery housing structure for various types of off-road vehicle power battery packs currently on the market. This off-road battery pack housing structure solves the problems of high development costs caused by using separate battery housings for different types of off-road vehicles, and the inability to share battery pack housings across different types of off-road vehicles. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the non-road vehicle battery pack housing structure described in this utility model;

[0021] Figure 2 This is a first-view exploded view of the off-road vehicle battery pack housing structure described in this utility model;

[0022] Figure 3 This is a second-view structural schematic diagram of the off-road vehicle battery pack housing structure described in this utility model;

[0023] Figure 4 This is a second-view exploded view of the off-road vehicle battery pack housing structure described in this utility model;

[0024] Figure 5 This is a top view of the housing in the off-road vehicle battery pack housing structure described in this utility model.

[0025] Illustration markings:

[0026] 1-Box body, 101-Bottom plate, 102-First side plate, 103-Second side plate, 104-Inner reinforcing rib of first side plate, 105-Wire harness maintenance slot, 106-Inner reinforcing rib of second side plate, 107-Outer reinforcing rib of second side plate;

[0027] 2-Top cover, 201-High voltage box casing, 202-High voltage box cover, 203-Through hole;

[0028] 3-Water inlet assembly, 301-Water inlet housing, 302-Water inlet hole;

[0029] 4-Water outlet assembly, 401-Water outlet housing, 402-Water outlet hole;

[0030] 5 - Wiring harness inspection board, 501 - Wiring harness board screw holes;

[0031] 6-Support frame, 601-Nut sleeve hole;

[0032] 7 - Battery cell module mounting position; 701 - Battery cell module mounting position;

[0033] 8-Battery cell module mounting cavity;

[0034] 9-Pressure-fit nut post;

[0035] 10 - Welding gasket;

[0036] 11-Connecting angle iron;

[0037] 12-Battery cell module end plate guide post;

[0038] 13 - Wiring harness board screws. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] like Figures 1-5 As shown, this solution provides a battery pack housing structure for off-road vehicles, including a housing 1 and a top cover 2 that can be interlocked to form a cell module mounting cavity 8. The housing 1 includes a bottom plate 101 and a first side plate 102 and a second side plate 103 that are symmetrically arranged. The first side plate 102 is provided with a water inlet assembly 3 and a water outlet assembly 4. When the cell module is installed in the cell module mounting cavity 8 and a liquid cooling plate is configured, the water inlet of the liquid cooling plate can be connected to an external water inlet pipe through the water inlet assembly, and the water outlet of the liquid cooling plate can be connected to an external water outlet pipe through the water outlet assembly. The second side plate 103 has a wire harness maintenance groove 105, and a corresponding wire harness maintenance groove 105 is provided. The wire harness inspection plate 5 is sealed. By opening the wire harness inspection plate 5, the wire harness connection status between each battery cell module on the battery cell module can be directly observed and repaired directly without opening the top cover 2 to remove the battery cell module already installed in the battery cell module mounting cavity 8 for repair, which is more convenient for the repair of non-road vehicle battery packs. The surface of the bottom plate 101 is provided with a battery cell module mounting position 7, and a welding gasket 10 is provided on the battery cell module mounting position 7 to raise the bottom of the battery cell module and form a heating film mounting space. The heating film mounting space is used to set the heating film for heating the bottom of the battery cell module.

[0041] The off-road vehicle battery pack enclosure structure provided by this solution integrates common off-road vehicle battery pack functions such as heat dissipation via liquid cooling plates, heating via heating films, and maintenance without removing the entire cell module. As a result, this off-road vehicle battery pack enclosure structure can be adapted to the application of most off-road vehicle battery packs on the market, eliminating the need for customized single-function enclosure structures and effectively reducing the development cost of battery packs.

[0042] The height of the welding gasket in this solution is 2mm to 5mm.

[0043] In this design, connecting angle irons 11 are symmetrically provided on the outer walls of the first side plate 102 and the second side plate 103, which are used to facilitate the fixing of the battery pack box to the frame of the off-road vehicle.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the water inlet assembly 3 includes an outwardly protruding water inlet sleeve 301 that can form a hidden cavity for the liquid cooling plate water inlet pipe. The water inlet sleeve 301 is provided with a water inlet sleeve hole 302 that allows the liquid cooling plate water inlet pipe to extend out.

[0045] The water outlet assembly 4 includes an outwardly protruding water outlet sleeve 401 that can form a hidden cavity for the water outlet connector of the liquid cooling plate. The water outlet sleeve 401 is provided with a water outlet hole 402 that allows the water outlet connector of the liquid cooling plate to extend out.

[0046] This embodiment provides a cavity for partially concealing the inlet and outlet water pipes of the liquid cooling plate by providing an outwardly protruding water inlet sleeve 301 and water outlet sleeve 401 on the first side plate 102. This not only does not occupy the volume of the cell module mounting cavity 8, but also makes the layout of the inlet and outlet water pipes of the liquid cooling plate more concise and compact.

[0047] like Figures 2-4 As shown, as an optimization of this embodiment, a support frame 6 with an outer shape corresponding to the wire harness maintenance slot 105 is provided on the outside of the wire harness maintenance slot 105, and the wire harness maintenance plate 5 is connected to the support frame 6 by wire harness plate screws 13.

[0048] Specifically, the second side plate 103 corresponding to the wire harness maintenance slot 105 is provided with a plurality of press-fit nut posts 9, the support frame 6 is provided with nut post sleeve holes 601 for fitting the press-fit nut posts 9, the wire harness maintenance plate 5 is provided with wire harness plate screw holes 501 corresponding to the positions of the nut post sleeve holes 601, the wire harness plate screw 13 is screwed to the press-fit nut posts 9 after passing through the wire harness plate screw holes 501, thereby realizing the movable connection between the wire harness maintenance plate 5, the support frame 6 and the second side plate 103, and finally achieving the sealing of the wire harness maintenance slot 105.

[0049] In this embodiment, a support frame 6 is provided on the outside of the wire harness maintenance slot 105. Since the thickness of the support frame 6 is greater than the thickness of the second side plate 103, it can provide stable support for the wire harness maintenance slot 105 and prevent it from deforming.

[0050] In addition, the support frame 6 provides support for the tightening depth of the wire harness plate screw 13, thereby enabling the wire harness inspection plate 5 to be more securely connected to the second side plate 103.

[0051] As a specific embodiment of this solution, there are two wire harness maintenance slots 105, which are arranged horizontally on the second side plate 103; there are corresponding two wire harness maintenance plates 5.

[0052] It should be noted that, in this embodiment, the wire harness inspection slot 105 corresponds to the wire harness connection face of the battery cell module located in the housing 1. That is, the connection status of the wire harness on the battery cell module can be clearly observed through the wire harness inspection slot, which facilitates manual repair when a connection failure occurs.

[0053] Two independent wire harness inspection slots 105 are horizontally arranged on the second side plate 103. This can increase the area for observing the inside of the box, and also ensure that opening only one large wire harness inspection slot 105 will reduce the support strength of the second side plate 103.

[0054] In addition, in this embodiment, a vertical second side plate outer reinforcing rib plate 107 is provided on the outer wall of the second side plate 103 corresponding to the two wire harness maintenance slots 105 to provide reinforcing support for the second side plate 103.

[0055] In this embodiment, the inner wall of the second side plate 103 is further provided with two inner reinforcing ribs 106 to provide further reinforcement support for the second side plate 103.

[0056] In addition, the inner wall of the first side plate 102 is provided with three inner reinforcing ribs 104, which are located on both sides and in the middle of the inner side of the first side plate 102, thereby providing reinforcement support for the first side plate 102.

[0057] like Figure 5 As shown, the battery module mounting position 7 in this embodiment includes a plurality of battery module mounting positions 701, and each battery module mounting position 701 is provided with a welding pad 10 that can raise the left and right sides of the front and rear end plates of the battery module respectively.

[0058] The two adjacent welding pads 10 between two adjacent battery cell module mounting positions 701 are integrated as a whole. This structure makes it easier to weld the welding pads 10 to the base plate 101 and reduces the complexity of welding them as two independent entities.

[0059] On the same battery cell module mounting position 701, a battery cell module end plate guide post 12 is also provided between two welding pads 10 located at the same end. This guide post can guide the guide post grooves opened at the bottom of the front and rear end covers of the battery cell module, thereby facilitating the quick positioning and subsequent assembly of the battery cell module with the battery cell module mounting position 7, such as fixing the battery cell module to the base plate by screws.

[0060] like Figures 1-4 As shown, in this embodiment, a high-voltage box housing 201 with a raised line is also provided on the top cover 2, and a corresponding high-voltage box cover 202 is configured to accommodate the part of the cell module module that is higher than the box body 1, such as the high-voltage box module commonly found in battery packs. A through hole 203 can also be provided on the side of the high-voltage box housing to facilitate the insertion of the high-voltage box with the outside.

[0061] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack housing structure for off-road vehicles, characterized in that, The enclosure includes a housing (1) and a top cover (2) that can be interlocked to form a battery cell module mounting cavity (8). The housing (1) includes a bottom plate (101) and a first side plate (102) and a second side plate (103) that are symmetrical to each other. The first side plate (102) is provided with a water inlet assembly (3) and a water outlet assembly (4). The second side plate (103) is provided with a wire harness maintenance groove (105) and is sealed by a corresponding wire harness maintenance plate (5). The surface of the bottom plate (101) is provided with a battery cell module mounting position (7) and a welding gasket (10) is provided on the battery cell module mounting position (7) to raise the bottom of the battery cell module and form a heating film mounting space. The heating film mounting space is used to install a heating film.

2. The off-road vehicle battery pack housing structure according to claim 1, characterized in that, The water inlet assembly (3) includes an outwardly protruding water inlet sleeve (301) that can form a hidden cavity for the liquid cooling plate water inlet pipe, and the water inlet sleeve (301) is provided with a water inlet sleeve hole (302) for the liquid cooling plate water inlet pipe to extend out. The water outlet assembly (4) includes a water outlet sleeve (401) that protrudes outward and forms a hidden cavity for the water outlet connector of the liquid cooling plate. The water outlet sleeve (401) is provided with a water outlet hole (402) for the water outlet connector of the liquid cooling plate to extend out.

3. The off-road vehicle battery pack housing structure according to claim 1, characterized in that, The outer side of the wire harness maintenance slot (105) is provided with a support frame (6) whose shape corresponds to the wire harness maintenance slot (105), and the wire harness maintenance plate (5) is connected to the support frame (6) by wire harness plate screws (13).

4. The off-road vehicle battery pack housing structure according to claim 3, characterized in that, The second side plate (103) corresponding to the wire harness inspection groove (105) is provided with a plurality of press-fit nut posts (9). The support frame (6) is provided with nut post sleeve holes (601) that can be fitted onto the press-fit nut posts (9). The wire harness inspection plate (5) is provided with wire harness plate screw holes (501) corresponding to the position of the nut post sleeve holes (601). The wire harness plate screw (13) is screwed onto the press-fit nut posts (9) after passing through the wire harness plate screw holes (501).

5. The off-road vehicle battery pack housing structure according to claim 4, characterized in that, There are two wire harness inspection slots (105), which are arranged horizontally on the second side plate (103); there are two corresponding wire harness inspection plates (5).

6. The off-road vehicle battery pack housing structure according to claim 5, characterized in that, A vertical second side plate outer reinforcing rib plate (107) is provided on the outer wall of the second side plate (103) corresponding to the two wire harness maintenance slots (105).

7. The off-road vehicle battery pack housing structure according to claim 1, characterized in that, The battery cell module mounting position (7) includes several battery cell module mounting positions (701), and each battery cell module mounting position (701) is provided with a welding pad (10) that can raise the left and right sides of the front and rear end plates of the battery cell module respectively.

8. The off-road vehicle battery pack housing structure according to claim 7, characterized in that, The two adjacent welding pads (10) between two adjacent battery cell module mounting positions (701) are a whole.

9. The off-road vehicle battery pack housing structure according to claim 1, characterized in that, On the same battery cell module mounting position (701), a battery cell module end plate guide post (12) is also provided between two welding pads (10) located at the same end, which can guide the guide post grooves opened at the bottom of the front and rear end covers of the battery cell module.

10. The off-road vehicle battery pack housing structure according to claim 1, characterized in that, The top cover (2) is also provided with a high voltage box shell (201) with a raised line, and is equipped with a corresponding high voltage box cover (202).

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