Electric motorcycle lithium battery module with heat dissipation function

Abstract

The invention 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, the base is of a cavity structure with an opening in the top, a shell is slidably connected in the base, a plurality of grooves are formed in the inner bottom wall of the shell, and a plurality of uniformly distributed battery cells are fixedly connected in the shell. A plurality of inserting plates are fixedly connected to the inner bottom wall of the base, a plurality of evenly-distributed side plates are fixedly connected into the inserting plates, a plurality of air bags are fixedly connected to the inner bottom wall of the base, the top ends of the air bags communicate with a second pipeline, and one end of the second pipeline penetrates through the inner bottom wall of the shell to communicate with an air outlet groove. According to the invention, when the shell moves downwards due to bumping, the air bag is extruded, so that air in the air bag can flow into the air outlet groove and flow in the plug board, heat on the plug board is taken away to cool the plug board, and the low-temperature plug board can cool the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and particularly to a lithium battery module for an electric motorcycle with a heat dissipation function. Background Art

[0002] An electric motorcycle is a type of electric vehicle that uses a lithium battery module to drive the motor to travel. The lithium battery module (Battery Modu l e) is a unit assembled by multiple battery cells, used to provide higher voltage and capacity. It is a component in the battery system, usually composed of several battery cells arranged together, connectors, (Battery ManagementSystem, abbreviated as BMS), a cooling system, and a housing, etc.

[0003] When an electric motorcycle is running, the battery cells inside the lithium battery module will discharge, thereby providing electrical energy for the electric motorcycle to drive the motor to travel. During the discharge process of the battery cells, heat will be generated, so it is necessary to use a cooling system fixed at the bottom of the lithium battery module to dissipate heat from the battery cells.

[0004] For one side between adjacent multiple battery cells, since they are in close contact, the heat on the side wall is higher than other positions of the battery cells. Because the cooling system is fixed at the bottom of the lithium battery module, when using the cooling system to dissipate heat from the battery cells, it usually cools the whole battery cells by absorbing the heat at the bottom of the battery cells, and it is not convenient to directly dissipate heat from the side walls between the battery cells, resulting in a longer time for the cooling system to dissipate heat from the battery cells. Summary of the Invention

[0005] In order to make up for the above deficiencies, the present invention provides a lithium battery module for an electric motorcycle with a heat dissipation function, aiming to improve the problem that in the prior art, the cooling system is fixed at the bottom of the lithium battery module, which is not convenient to directly dissipate heat from the side walls between the battery cells, resulting in a longer time for the cooling system to dissipate heat from the battery cells.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: A lithium battery module for an electric motorcycle with a heat dissipation function, including a base,

[0007] A housing is slidably connected inside the base, and a plurality of battery cells are fixedly connected inside the housing;

[0008] A plurality of plug boards are fixedly connected inside the housing, and the plug boards are provided with a cavity structure with openings at both the top and bottom ends;

[0009] A plurality of side plates are fixedly connected inside the plurality of plug boards;

[0010] A plurality of second springs are fixedly connected to the four corners at the bottom end of the housing, and one end of each of the plurality of second springs is fixedly connected to the four corners of the inner side wall of the base, for pushing the housing to move;

[0011] Multiple air bags, all fixedly connected to the bottom of the housing, and one ends of multiple said air bags are all fixedly connected to the inner bottom wall of the base;

[0012] Multiple second pipelines, all communicated with the top of the air bags, and one ends of multiple said second pipelines penetrate through the housing and are communicated with an air outlet groove, and multiple said air outlet grooves are fixedly connected to the bottom end of the plug board;

[0013] Multiple check valves II, all communicated with the middle part of the outer side of the second pipeline;

[0014] Multiple first pipelines, all communicated with the bottom end of one side of the air bag, and one ends of multiple said first pipelines penetrate through the inner bottom wall of the base and are communicated with a check valve I;

[0015] Two auxiliary parts, 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, the motors are respectively fixedly connected to both sides of the top end of the base, and drive ends of the two said motors are both fixedly connected with lead screws;

[0018] Two chutes are opened on both sides of the inner side wall of the base, sliding blocks are respectively slidably connected inside the two said chutes, and the two said sliding blocks are threadedly connected to the outer side of the lead screw.

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

[0020] The two said auxiliary parts further include bumps, which are respectively fixedly connected to both sides of the bottom end of the housing, and slots are opened on the outer sides of the two said bumps;

[0021] Two electric push rods are fixedly connected to one side of the sliding block, plug blocks are fixedly connected to drive ends of the two said electric push rods, and one sides of the two said plug blocks are respectively inserted into the slots.

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

[0023] The inner side wall of the base is fixedly connected with multiple pressure cylinders, push blocks are respectively slidably connected inside the multiple said pressure cylinders, connecting rods are fixedly connected to the top ends of the multiple said push blocks, and one ends of the multiple said connecting rods penetrate through the pressure cylinders and are fixedly connected to the bottom end of the housing.

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

[0025] A first spring is wound around the outer sides of the multiple said connecting rods, one ends of the multiple first springs are all fixedly connected to the bottom end of the housing, and the other ends of the multiple first springs are all fixedly connected to the top end 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 shell, and a plurality of air outlets are provided on the cover plate.

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

[0029] Through holes are provided on both sides of the plurality of push blocks 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 configured as a U-shaped structure, and the insert block is configured as a U-shaped structure.

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

[0033] The plug board is arranged between the plurality of battery cells.

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

[0035] The inner bottom wall of the shell is provided with a plurality of grooves, and the air outlet slots are fixed inside the grooves at the bottom of the shell.

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

[0037] In the present invention, 1. when the shell moves downward due to bumps, it will squeeze the airbag, so that the air inside the airbag can flow into the inside of the second pipe, and open the second one-way valve, so that the air inside the second pipe enters the inside of the plug board through the air outlet slot and flows inside the plug board, thereby taking away the heat on the plug board to cool the plug board, and then the low-temperature plug board can cool the battery cell.

[0038] 2. The flowing air takes away the temperature of the battery cell, which can avoid the accidental leakage of the coolant inside the pipe during the process of using liquid cooling to cool the battery cell. At the same time, there is no need to install a cooling plate and a pipe for conveying coolant inside the shell, thereby reducing the weight of the battery module.

[0039] 3. When the outer shell moves downward due to bumps, it will squeeze the airbag and cause the air inside the airbag to flow out. The deformed airbag and the remaining air inside the airbag can absorb the impact force generated when the outer shell is bumped, thereby reducing the probability of the battery cells inside the outer shell being damaged due to bumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A three-dimensional diagram of an electric motorcycle lithium battery module with heat dissipation function proposed by the present invention;

[0041] Figure 2Cross-sectional view of the base of a lithium battery module for an electric motorcycle with heat dissipation function proposed by the present invention;

[0042] Figure 3 Structural schematic diagram of the shell of a lithium battery module for an electric motorcycle with heat dissipation function proposed by the present invention;

[0043] Figure 4 Structural schematic diagram of the plug board of a lithium battery module for an electric motorcycle with heat dissipation function proposed by the present invention;

[0044] Figure 5 Cross-sectional view of the pressure cylinder of a lithium battery module for an electric motorcycle with heat dissipation function proposed by the present invention;

[0045] Figure 6 Structural schematic diagram of the electric push rod of a lithium battery module for an electric motorcycle with heat dissipation function proposed by the present invention;

[0046] Figure 7 Cross-sectional view of the shell of a lithium battery module for an electric motorcycle with heat dissipation function proposed by the present invention.

[0047] Legend:

[0048] 1. Base; 2. Shell; 3. Cover plate; 4. Motor; 5. Check valve 1; 6. Pipe 1; 7. Pressure cylinder; 8. Electric push rod; 9. Screw rod; 10. Convex block; 11. Airbag; 12. Chute; 13. Spring 1; 14. Air outlet groove; 15. Check valve 2; 16. Pipe 2; 17. Side plate; 18. Electric core; 19. Push block; 20. Connecting rod; 21. Insert block; 22. Insert slot; 23. Slide block; 24. Plug board; 25. Spring 2. Detailed implementation method

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0050] Refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 7, an embodiment provided by the present invention: a lithium battery module for an electric motorcycle with heat dissipation function, including a base 1, the base 1 is provided with a cavity structure with an opening at the top, the base 1 is internally slidably connected with a housing 2, a plurality of grooves are opened on the inner bottom wall of the housing 2, a plurality of uniformly distributed battery cells 18 are fixedly connected inside the housing 2, a plurality of inserting plates 24 are fixedly connected to the inner bottom wall of the base 1, the inserting plates 24 are provided with a cavity structure with openings at both the top and the bottom, the inserting plates 24 are arranged between a plurality of battery cells 18, a plurality of uniformly distributed side plates 17 are fixedly connected inside the inserting plates 24, a plurality of air bags 11 are fixedly connected to the inner bottom wall of the base 1, the top of the air bags 11 is communicated with a second pipeline 16, one end of the second pipeline 16 penetrates through the inner bottom wall of the housing 2 and is communicated with an air outlet groove 14, the air outlet groove 14 is fixedly connected to the bottom of the inserting plate 24, the air outlet groove 14 is fixed inside the bottom groove of the housing 2, and a check valve two 15 is communicated with the outer side of the middle part of the second pipeline 16.

[0051] When the electric motorcycle generates bumps during driving, the housing 2 inside the base 1 will vibrate and move up and down. When the housing 2 moves downward, it will squeeze the air bag 11, so that the air inside the air bag 11 can flow into the second pipeline 16, and push open the check valve two 15, so that the air inside the second pipeline 16 enters the inserting plate 24 through the air outlet groove 14 and flows inside the inserting plate 24, thereby taking away the heat on the inserting plate 24 to cool the inserting plate 24, and further enabling the low-temperature inserting plate 24 to cool the battery cells 18.

[0052] When the air flows inside the inserting plate 24, it will pass through the surface of the side plates 17 inside the inserting plate 24, thereby increasing the area of the inserting plate 24 blown by the air and enabling the inserting plate 24 to be cooled quickly.

[0053] Refer to Figure 1 and Figure 2 , a second spring 25 is fixedly connected to the bottom end of the housing 2, one end of the second spring 25 is fixedly connected to the inner bottom wall of the base 1, a first pipeline 6 is communicated with the bottom side of one side of the air bag 11, and one end of the first pipeline 6 penetrates through the inner side wall of the base 1 and is communicated with a check valve one 5.

[0054] After the housing 2 squeezes the air bag 11, the second spring 25 will push the housing 2 to move upward due to its own elasticity. At this time, the housing 2 will pull the air bag 11 upward, so that a negative pressure is generated inside the air bag 11, and at this time the check valve one 5 will open, enabling the external air to enter the air bag 11 through the first pipeline 6 to fill the air bag 11 with air.

[0055] Refer to Figure 2 and Figure 5, at the four corners of the inner bottom wall of the base 1, pressure cylinders 7 are fixedly connected. Damping oil is stored inside the pressure cylinders 7. A push block 19 is slidably connected inside the pressure cylinders 7. Through holes are formed on both sides of the push block 19, and flow control valves are installed inside the through holes. The top end of the push block 19 is fixedly connected with a connecting rod 20. One end of the connecting rod 20 penetrates through the pressure cylinder 7 and is fixedly connected to the bottom end of the outer shell 2. A first spring 13 is wound around the outside of the connecting rod 20. One end of the first spring 13 is fixedly connected to the bottom end of the outer shell 2, and the other end of the first spring 13 is fixedly connected to the top end of the pressure cylinder 7.

[0056] When the outer shell 2 moves downward due to bumps, it will squeeze the first spring 13 and cause deformation, absorbing the impact force on the outer shell 2. And when the outer shell 2 moves, it will push the push block 19 to move downward inside the pressure cylinder 7 through the connecting rod 20. When the push block 19 moves upward, the damping oil inside the pressure cylinder 7 will enter the cavity inside the top end of the push block 19 through the flow control valve inside the through hole. When the damping oil passes through the through hole, a throttling damping force will be generated, further absorbing and diffusing the impact force on the outer shell 2. And when the outer shell 2 moves downward, it will also squeeze the second spring 25 and the airbag 11, causing the second spring 25 and the airbag 11 to deform together. When the second spring 25 deforms, it will absorb and diffuse the impact force on the outer shell 2. When the airbag 11 deforms, the air inside will absorb the impact force on the outer shell 2. Through the above structure, the vibration generated by the outer shell 2 due to bumps is reduced.

[0057] Refer to Figure 2 , Figure 6 and Figure 7 , on both sides of the bottom end of the outer shell 2, bumps 10 are fixedly connected. Slots 22 are formed on the outside of the bumps 10. The slots 22 are of U-shaped structure. On both sides of the inner side wall of the base 1, chutes 12 are formed. Sliders 23 are slidably connected inside the chutes 12. An electric push rod 8 is fixedly connected to one side of the slider 23. The output end of the electric push rod 8 is fixedly connected with an insertion block 21. The insertion block 21 is inserted inside the slot 22. The insertion block 21 is of U-shaped structure. On both sides of the top end of the base 1, motors 4 are fixedly connected. The driving ends of the motors 4 are fixedly connected with lead screws 9. One end of the lead screw 9 penetrates through the side wall of the chute 12 and is threadedly connected inside the slider 23.

[0058] When the vibration amplitude of the outer shell 2 is small and cannot squeeze the airbag 11, the electric push rod 8 can be used to push the insertion block 21 into the slot 22. Then start the motor 4 to drive the lead screw 9 to rotate, pushing the slider 23 to move inside the chute 12, thereby pulling the outer shell 2 downward through the bump 10 to squeeze the airbag 11 so that the air inside the airbag 11 can flow inside the insertion plate 24 to cool the insertion plate 24, enabling the insertion plate 24 to absorb the heat from the battery cell 18.

[0059] Refer to Figure 1 , a cover plate 3 is fixedly connected to the top end of the outer shell 2. A plurality of uniformly distributed air outlets are formed 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 end of the housing 2 to seal the housing 2, thereby protecting the battery cell 18 inside the housing 2. Moreover, the air outlet on the cover plate 3 enables the cavity inside the plug board 24 to flow out from the top end of the plug board 24, allowing the air inside the plug board 24 to flow.

[0061] Working principle: During the driving of the electric motorcycle, when bumps occur, the housing 2 inside the base 1 will vibrate and move up and down. When the housing 2 moves downward, it will squeeze the airbag 11, enabling the air inside the airbag 11 to flow through the second pipeline 16 into the air outlet groove 14, and then enter the plug board 24 through the air outlet groove 14 and flow inside the plug board 24, thereby taking away the heat on the plug board 24 to cool the plug board 24, and further enabling the low-temperature plug board 24 to cool the battery cell. When the vibration amplitude of the housing 2 is small and cannot squeeze the airbag 11, the electric push rod 8 can be used to push the plug block 21 into the slot 22, and the motor 4 is started to make the lead screw 9 push the slider 23 to slide downward inside the chute 12, thereby pulling the housing 2 downward to squeeze the airbag 11, enabling the air inside the airbag 11 to flow inside the plug board 24 to cool the plug board 24, and enabling the plug board 24 to absorb the heat on the battery cell 18.

[0062] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric motorcycle lithium battery module with a heat dissipation function, characterized in that: It includes a base (1), inside the base (1), there is a sliding connection with a housing (2), and inside the housing (2), there are multiple battery cells (18) fixedly connected; multiple plug boards (24), all fixedly connected inside the housing (2), and the plug boards (24) are provided with a cavity structure with openings at both the top and bottom ends; multiple side plates (17), all fixedly connected inside the multiple plug boards (24); multiple second springs (25), all fixedly connected to the four corners at the bottom end of the housing (2), and one end of each of the multiple second springs (25) is fixedly connected to the four corners of the inner side wall of the base (1) for pushing the housing (2) to move; multiple air bags (11), all fixedly connected to the bottom of the housing (2), and one end of each of the multiple air bags (11) is fixedly connected to the inner bottom wall of the base (1); multiple second pipes (16), all connected to the top of the air bags (11), and one end of each of the multiple second pipes (16) penetrates the housing (2) and is connected to an air outlet groove (14), and the multiple air outlet grooves (14) are fixedly connected to the bottom end of the plug board (24); multiple check valves two (15), all connected to the middle part on the outer side of the second pipes (16); multiple first pipes (6), all connected to the bottom end on one side of the air bags (11), and one end of each of the multiple first pipes (6) penetrates the inner bottom wall of the base (1) and is connected to a check valve one (5); two auxiliary parts, fixedly connected to both sides of the base (1).

2. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 1, wherein: The two auxiliary parts include motors (4), and the motors (4) are respectively fixedly connected to both sides of the top end of the base (1), and the driving ends of the two motors (4) are both fixedly connected with lead screws (9); two chutes (12), opened on both sides of the inner side wall of the base (1), and inside the two chutes (12), there are sliding connections with sliders (23), and the two sliders (23) are threadedly connected to the outer side of the lead screws (9).

3. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 2, wherein: The two auxiliary parts also include bumps (10), respectively fixedly connected to both sides of the bottom end of the housing (2), and slots (22) are opened on the outer sides of the two bumps (10); two electric push rods (8), fixedly connected to one side of the sliders (23), and the driving ends of the two electric push rods (8) are fixedly connected with plugs (21), and one side of each of the two plugs (21) is inserted into the slots (22) inside.

4. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 1, wherein: The inner side wall of the bottom end of the base (1) is fixedly connected with multiple pressure cylinders (7), and inside the multiple pressure cylinders (7), there are sliding connections with push blocks (19), and the top ends of the multiple push blocks (19) are fixedly connected with connecting rods (20), and one end of each of the multiple connecting rods (20) penetrates the pressure cylinders (7) and is fixedly connected to the bottom end of the housing (2).

5. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 4, wherein: Outside the multiple connecting rods (20), there are first springs (13) wound around, and one end of each of the multiple first springs (13) is fixedly connected to the bottom end of the housing (2), and the other end of each of the multiple first springs (13) is fixedly connected to the top end of the pressure cylinder (7).

6. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 1, wherein: The top end of the housing (2) is fixedly connected with a cover plate (3), and multiple air outlet openings are opened on the cover plate (3).

7. A lithium battery module for an electric motorcycle with a heat dissipation function according to claim 4, characterized in that: On both sides of the multiple push blocks (19), through holes are opened to enable the damping oil inside the pressure cylinders (7) to flow.

8. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 3, wherein: The slot (22) is provided with a U-shaped structure, and the insertion block (21) is provided with a U-shaped structure.

9. The lithium battery module for an electric motorcycle with a heat dissipation function according to claim 3, wherein: The insertion plate (24) is arranged between a plurality of the battery cells (18).

10. A lithium battery module for an electric motorcycle with a heat dissipation function according to claim 1, characterized in that: A plurality of grooves are formed in the inner bottom wall of the housing (2), and the air outlet groove (14) is fixed inside the grooves at the bottom of the housing (2).

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