Electric motorcycle lithium battery module with heat dissipation function

Abstract

The application relates to the technical field of lithium batteries, and discloses an electric motorcycle lithium battery module with a heat dissipation function, which comprises a base provided with a cavity structure with an opening at the top, a shell is slidably connected in the base, a plurality of grooves are formed in the inner bottom wall of the shell, a plurality of uniformly-distributed battery cells are fixedly connected in the shell, a plurality of plugboards are fixedly connected to the inner bottom wall of the base, a plurality of uniformly-distributed side plates are fixedly connected to the plugboards, a plurality of air bags are fixedly connected to the inner bottom wall of the base, a pipeline II is communicated with the top end of the air bag, and an air outlet groove is communicated with one end of the pipeline II and penetrates through the inner bottom wall of the shell. In the application, when the shell moves downward due to bumping, the air bags are extruded, air in the air bags can flow into the air outlet groove, and flows in the plugboards, so that the heat on the plugboards is taken away to cool the plugboards, and the low-temperature plugboards can cool the battery cells.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and in particular to a lithium battery module for electric motorcycles with heat dissipation function. Background Technology

[0002] Electric motorcycles are a type of electric vehicle that uses lithium battery modules to drive the motor. A lithium battery module is a unit assembled from multiple battery cells to provide higher voltage and capacity. It is a component of a battery system and typically consists of several cells arranged together, connectors, a Battery Management System (BMS), a cooling system, and a casing.

[0003] When an electric motorcycle is in motion, the cells inside the lithium battery module discharge to provide power for the motor. During the discharge process, the cells generate heat, which requires a cooling system fixed to the bottom of the lithium battery module to dissipate the heat.

[0004] For multiple adjacent battery cells, the sidewall between them, where the cells are closely attached, experiences higher heat than other parts of the cell. Since the cooling system is fixed to the bottom of the lithium battery module, when using the cooling system to dissipate heat from the cells, it typically cools the entire cell by absorbing heat from its bottom. It's not convenient to directly dissipate heat from the sidewalls between the cells, thus making it take longer for the cooling system to cool the cells. Summary of the Invention

[0005] To overcome the above shortcomings, the present invention provides an electric motorcycle lithium battery module with heat dissipation function, which aims to improve the problem that in the prior art, the cooling system is fixed to the bottom of the lithium battery module, which is not convenient for directly dissipating heat from the side walls between the cells, thus making it take a long time for the cooling system to dissipate heat from the cells.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a lithium battery module for electric motorcycles with heat dissipation function, including a base.

[0007] The base is slidably connected to an outer shell, and multiple battery cells are fixedly connected inside the outer shell;

[0008] Multiple insert plates are fixedly connected inside the outer shell, and the insert plates are designed as hollow structures with openings at both the top and bottom ends;

[0009] Multiple side plates are all fixedly connected inside the multiple insert plates;

[0010] Multiple springs are fixedly connected to the four corners of the bottom end of the outer shell, and one end of each of the multiple springs is fixedly connected to the four corners of the inner side wall of the base, for pushing the outer shell to move.

[0011] Multiple airbags are fixedly connected to the bottom of the outer shell, and one end of each airbag is fixedly connected to the inner bottom wall of the base.

[0012] Multiple pipes are connected to the top of the airbag, and one end of each pipe penetrates the outer shell and is connected to an air outlet slot. The multiple air outlet slots are fixedly connected to the bottom of the insert plate.

[0013] Multiple one-way valves are connected to the middle of the outer side of the second pipe;

[0014] Multiple pipes are connected to the bottom end of one side of the airbag, and one end of each of the multiple pipes penetrates the inner bottom wall of the base and is connected to a one-way valve.

[0015] Two auxiliary parts are fixedly connected to both sides of the base.

[0016] As a further description of the above technical solution:

[0017] The two auxiliary parts include motors, which are respectively fixedly connected to the top two sides of the base, and both motor drive ends are fixedly connected to lead screws;

[0018] Two sliding grooves are formed on both sides of the inner side wall of the base. A slider is slidably connected inside each of the two sliding grooves, and the two sliders are threaded to the outside of the lead screw.

[0019] As a further description of the above technical solution:

[0020] The two auxiliary parts also include protrusions, which are fixedly connected to both sides of the bottom end of the housing, and slots are provided on the outer side of each of the two protrusions;

[0021] Two electric push rods are fixedly connected to one side of the slider, and the driving ends of the two electric push rods are fixedly connected to the inserts. One side of each of the two inserts is inserted into the slot.

[0022] As a further description of the above technical solution:

[0023] Multiple pressure cylinders are fixedly connected to the bottom of the inner side wall of the base. Each pressure cylinder has a push block slidably connected inside. Each push block has a connecting rod fixedly connected to its top. One end of each connecting rod passes through the pressure cylinder and is fixedly connected to the bottom of the outer shell.

[0024] As a further description of the above technical solution:

[0025] Multiple connecting rods are surrounded by springs, one end of each spring is fixedly connected to the bottom of the outer casing, and the other end of each spring is fixedly connected to the top of the pressure cylinder.

[0026] As a further description of the above technical solution:

[0027] A cover plate is fixedly connected to the top of the outer shell, and multiple air outlets are provided on the cover plate.

[0028] As a further description of the above technical solution:

[0029] Each of the push blocks has through holes on both sides to allow the damping oil inside the pressure cylinder to flow.

[0030] As a further description of the above technical solution:

[0031] The slot is designed with a U-shaped structure, and the insert is designed with a U-shaped structure.

[0032] As a further description of the above technical solution:

[0033] The insert plate is disposed between the plurality of battery cells.

[0034] As a further description of the above technical solution:

[0035] The inner bottom wall of the outer casing has multiple grooves, and the air outlet slot is fixed inside the bottom groove of the outer casing.

[0036] The present invention has the following beneficial effects:

[0037] In this invention, 1. When the outer casing moves downward due to bumps, it will compress the airbag, thereby allowing the air inside the airbag to flow into the second pipe and open the second one-way valve, allowing the air inside the second pipe to enter the inside of the plug plate through the air outlet slot and flow inside the plug plate, thereby carrying away the heat on the plug plate and cooling the plug plate, thereby enabling the low-temperature plug plate to cool the battery cell.

[0038] 2. By using flowing air to remove heat from the battery cells, it is possible to avoid accidental leakage of coolant inside the pipes during the process of cooling the battery cells with liquid coolant. At the same time, since there is no need to install cooling plates and coolant pipelines inside the casing, the weight of the battery module is reduced.

[0039] 3. When the outer casing moves downwards due to bumps, it will compress the airbag and cause the air inside the airbag to flow out. The deformed airbag and the air remaining inside the airbag can absorb the impact force generated when the outer casing is bumped, thereby reducing the probability of the battery cells inside the outer casing being damaged by bumps. Attached Figure Description

[0040] Figure 1 This is a perspective view of a lithium battery module for an electric motorcycle with heat dissipation function proposed in this invention.

[0041] Figure 2This is a cross-sectional view of the base of a lithium battery module for an electric motorcycle with heat dissipation function proposed in this invention.

[0042] Figure 3 This is a schematic diagram of the outer casing of a lithium battery module for an electric motorcycle with heat dissipation function proposed in this invention.

[0043] Figure 4 This is a schematic diagram of the insert plate of an electric motorcycle lithium battery module with heat dissipation function proposed in this invention.

[0044] Figure 5 This is a cross-sectional view of a pressure cylinder for a lithium battery module for an electric motorcycle with heat dissipation function, as proposed in this invention.

[0045] Figure 6 This is a schematic diagram of the electric push rod of an electric motorcycle lithium battery module with heat dissipation function proposed in this invention.

[0046] Figure 7 This is a cross-sectional view of the housing of an electric motorcycle lithium battery module with heat dissipation function proposed in this invention.

[0047] Legend:

[0048] 1. Base; 2. Outer shell; 3. Cover plate; 4. Motor; 5. One-way valve I; 6. Pipe I; 7. Pressure cylinder; 8. Electric push rod; 9. Lead screw; 10. Protrusion; 11. Airbag; 12. Slide groove; 13. Spring I; 14. Air outlet slot; 15. One-way valve II; 16. Pipe II; 17. Side plate; 18. Battery cell; 19. Push block; 20. Connecting rod; 21. Insert block; 22. Slot; 23. Slider; 24. Insert plate; 25. Spring II. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Reference Figure 2 , Figure 3 , Figure 4 and Figure 7An embodiment of the present invention provides a lithium battery module for an electric motorcycle with heat dissipation function, comprising a base 1, the base 1 being a cavity structure with an opening at the top, a shell 2 being slidably connected inside the base 1, the inner bottom wall of the shell 2 having multiple grooves, a multiple evenly distributed battery cells 18 being fixedly connected inside the shell 2, a multiple insert plates 24 being fixedly connected to the inner bottom wall of the base 1, the insert plates 24 being a cavity structure with openings at both the top and bottom, the insert plates 24 being disposed between the multiple battery cells 18, a multiple evenly distributed side plates 17 being fixedly connected inside the insert plates 24, a multiple airbags 11 being fixedly connected to the inner bottom wall of the base 1, the top of the airbags 11 being connected to a second pipe 16, one end of the second pipe 16 penetrating through the inner bottom wall of the shell 2 and connecting to an air outlet slot 14, the air outlet slot 14 being fixedly connected to the bottom of the insert plates 24, the air outlet slot 14 being fixed inside the groove at the bottom of the shell 2, and a second one-way valve 15 being connected to the outer side of the middle of the second pipe 16.

[0051] When the electric motorcycle experiences bumps while riding, the outer shell 2 inside the base 1 vibrates and moves up and down. When the outer shell 2 moves downward, it compresses the airbag 11, allowing air inside the airbag 11 to flow into the pipe 16 and open the one-way valve 15. This allows the air inside the pipe 16 to enter the socket 24 through the air outlet 14 and flow inside the socket 24, thereby carrying away the heat from the socket 24 and cooling it down. This, in turn, allows the low-temperature socket 24 to cool the battery cell 18.

[0052] When air flows inside the insert plate 24, it passes through the surface of the side plate 17 inside the insert plate 24, thereby increasing the area of ​​the insert plate 24 exposed to airflow and enabling the insert plate 24 to cool down quickly.

[0053] Reference Figure 1 and Figure 2 A spring 25 is fixedly connected to the bottom of the outer shell 2. One end of the spring 25 is fixedly connected to the inner bottom wall of the base 1. A pipe 6 is connected to one side of the bottom of the airbag 11. One end of the pipe 6 passes through the inner side wall of the base 1 and is connected to a one-way valve 5.

[0054] When the outer shell 2 compresses the airbag 11, the spring 25 will push the outer shell 2 upward due to its own elasticity. At this time, the outer shell 2 will pull the airbag 11 upward, thereby creating a negative pressure inside the airbag 11. At this time, the one-way valve 5 will open, allowing external air to enter the airbag 11 through the pipe 6, filling the airbag 11 with air.

[0055] Reference Figure 2 and Figure 5Pressure cylinders 7 are fixedly connected to the four corners of the inner bottom wall of the base 1. Damping oil is stored inside the pressure cylinders 7. Push blocks 19 are slidably connected inside the pressure cylinders 7. Through holes are opened on both sides of the push blocks 19. Flow valves are installed inside the through holes. A connecting rod 20 is fixedly connected to the top of the push block 19. One end of the connecting rod 20 passes through the pressure cylinder 7 and is fixedly connected to the bottom of the outer shell 2. A spring 13 is wrapped around the outside of the connecting rod 20. One end of the spring 13 is fixedly connected to the bottom of the outer shell 2, and the other end of the spring 13 is fixedly connected to the top of the pressure cylinder 7.

[0056] When the outer shell 2 moves downwards due to bumps, it compresses and deforms the spring 13, absorbing the impact force on the outer shell 2. As the outer shell 2 moves, it pushes the push block 19 downwards inside the pressure cylinder 7 via the connecting rod 20. When the push block 19 moves upwards, the damping oil inside the pressure cylinder 7 enters the cavity at the top of the push block 19 through the flow valve inside the through hole. The damping oil generates a throttling damping force as it passes through the through hole, further absorbing and diffusing the impact force on the outer shell 2. Similarly, as the outer shell 2 moves downwards, it compresses the spring 25 and the airbag 11, causing them to deform together. The spring 25 absorbs and diffuses the impact force on the outer shell 2 during deformation, and the airbag 11 absorbs the impact force on the outer shell 2 during deformation. Through this structure, the vibration of the outer shell 2 caused by bumps is reduced.

[0057] Reference Figure 2 , Figure 6 and Figure 7 Both sides of the bottom of the outer shell 2 are fixedly connected to protrusions 10. The outer side of the protrusions 10 is provided with slots 22. The slots 22 are U-shaped. Both sides of the inner sidewall of the base 1 are provided with sliding grooves 12. The sliding slider 23 is slidably connected inside the sliding grooves 12. An electric push rod 8 is fixedly connected to one side of the sliding slider 23. The output end of the electric push rod 8 is fixedly connected to a plug 21. The plug 21 is inserted into the slot 22. The plug 21 is U-shaped. Both sides of the top of the base 1 are fixedly connected to motors 4. The drive end of the motor 4 is fixedly connected to a lead screw 9. One end of the lead screw 9 passes through the sidewall of the sliding groove 12 and is threaded into the sliding slider 23.

[0058] When the vibration amplitude of the outer shell 2 is small and cannot compress the airbag 11, the insert block 21 can be pushed into the slot 22 by the electric push rod 8. Then, the motor 4 is started to drive the lead screw 9 to rotate, pushing the slider 23 to move inside the slide groove 12. Thus, the outer shell 2 is pulled downward by the protrusion 10 to compress the airbag 11, so that the air inside the airbag 11 can flow inside the insert plate 24 to cool the insert plate 24, so that the insert plate 24 can absorb the heat on the battery cell 18.

[0059] Reference Figure 1 The top of the outer shell 2 is fixedly connected to a cover plate 3, and multiple evenly distributed air outlets are opened on the cover plate 3.

[0060] After the battery cell 18 is installed inside the housing 2, the cover plate 3 can be fixed to the top of the housing 2 to seal the housing 2, thereby protecting the battery cell 18 inside the housing 2. The air outlet on the cover plate 3 allows the cavity inside the plug plate 24 to flow out from the top of the plug plate 24, allowing the air inside the plug plate 24 to circulate.

[0061] Working principle: When the electric motorcycle is in motion and bumps occur, the outer shell 2 inside the base 1 vibrates and moves up and down. When the outer shell 2 moves downward, it compresses the airbag 11, allowing the air inside the airbag 11 to flow through the pipe 16 into the air outlet 14, and then into the insert plate 24. The air flows inside the insert plate 24, carrying away the heat from the insert plate 24 and cooling it down. This allows the low-temperature insert plate 24 to cool the battery cell. When the vibration amplitude of the outer shell 2 is small and cannot compress the airbag 11, the electric push rod 8 pushes the insert block 21 into the slot 22. The motor 4 is started, causing the lead screw 9 to push the slider 23 downward in the slide groove 12, thereby pulling the outer shell 2 downward and compressing the airbag 11. This allows the air inside the airbag 11 to flow inside the insert plate 24, cooling the insert plate 24 and allowing it to absorb the heat from the battery cell 18.

[0062] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric motorcycle lithium battery module with heat dissipation function, characterized in that: Including base (1), The shell (2) is internally and fixedly connected with a plurality of battery cells (18), the shell (2) is fixedly connected with a cover plate (3) at the top end, and a plurality of air outlets are formed in the cover plate (3); Two protrusions (10) are provided on the outer sides of the two protrusions (10), and a slot (22) is formed in the outer side of each protrusion (10); Two sliding grooves (12) are formed on the inner side walls of the base (1), and a sliding block (23) is slidably connected in the inner side of each sliding groove (12); Two electric push rods (8) are fixedly connected to one side of the sliding block (23), and an insertion block (21) is fixedly connected to the driving end of each electric push rod (8); one side of each insertion block (21) is inserted into the slot (22). Two motors (4) are fixedly connected to the top ends of the base (1) on both sides, respectively, and a screw rod (9) is fixedly connected to the driving end of each motor (4); one end of each screw rod (9) penetrates the side wall of the sliding groove (12) and is threadedly connected to the inside of the sliding block (23). A plurality of plug-in plates (24) are fixedly connected inside the shell (2), the plug-in plates (24) are arranged between the plurality of battery cells (18), and the plug-in plates (24) are provided as a cavity structure with openings at the top and bottom ends. A plurality of side plates (17) are fixedly connected inside the plurality of plug-in plates (24). A plurality of spring II (25) are fixedly connected to the bottom corners of the shell (2), one end of each spring II (25) is fixedly connected to the four corners of the inner side wall of the base (1), and the shell (2) is moved by the spring II (25). A plurality of air bags (11) are fixedly connected to the bottom of the shell (2), and one end of each air bag (11) is fixedly connected to the inner bottom wall of the base (1). A plurality of ducts II (16) are communicated at the top of the air bag (11), one end of each duct II (16) penetrates the shell (2) and is communicated with an air outlet groove (14), and the air outlet groove (14) is fixedly connected to the bottom end of the plug-in plate (24). A plurality of one-way valves II (15) are communicated on the outer sides of the ducts II (16). A plurality of ducts I (6) are communicated on one side and the bottom end of the air bag (11), and one end of each duct I (6) penetrates the inner bottom wall of the base (1) and is communicated with a one-way valve I (5).

2. The electric motorcycle lithium battery module with heat dissipation function according to claim 1, characterized in that: A plurality of pressure cylinders (7) are fixedly connected to the bottom end of the inner side wall of the base (1), a push block (19) is slidably connected in each pressure cylinder (7), a connecting rod (20) is fixedly connected to the top end of each push block (19), and one end of each connecting rod (20) penetrates the pressure cylinder (7) and is fixedly connected to the bottom end of the shell (2).

3. The electric motorcycle lithium battery module with heat dissipation function according to claim 2, characterized in that: A plurality of spring I (13) are arranged on the outer sides of the connecting rods (20), one end of each spring I (13) is fixedly connected to the bottom end of the shell (2), and the other end of each spring I (13) is fixedly connected to the top end of the pressure cylinder (7).

4. The electric motorcycle lithium battery module with heat dissipation function according to claim 3, characterized in that: A plurality of through holes are formed on the two sides of each push block (19) to allow the damping oil in the pressure cylinder (7) to flow.

5. The electric motorcycle lithium battery module with heat dissipation function according to claim 3, characterized in that: The slot (22) is provided with a U-shaped structure, and the plug (21) is provided with a U-shaped structure.

6. The electric motorcycle lithium battery module with heat dissipation function according to claim 1, characterized in that: The bottom wall of the shell (2) is provided with a plurality of grooves, and the air outlet groove (14) is fixed in the groove at the bottom of the shell (2).

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