A lithium battery steel shell

Abstract

The present invention discloses a lithium battery steel shell, comprising an outer shell, a fixing plate fixedly connected to the bottom of the outer shell, an inner shell fixedly connected to the top of the fixing plate, a moving rod slidably connected to the fixing plate, a pressure rod passing through the inner shell fixedly connected to the inner side of the moving rod, a bottom rod fixedly connected to the inner side of the bottom of the moving rod, a second threaded rod screwed to the bottom of the outer shell by threaded engagement, a connecting rod rotatably connected to the top of the second threaded rod, and a free end of the connecting rod rotatably connected to the bottom rod. In the present invention, the second threaded rod is connected to the threaded hole by rotating, and the connecting rod is driven to move upward while the second threaded rod moves, and then the moving rod and the pressure rod are pulled by the bottom rod to move close to the winding core, and the winding core is fixed inside the inner shell under the action of the friction wheel, thereby increasing the connection stability between the winding core and the inner shell, and avoiding the problem of the battery not being able to be used normally due to the breakage of the welding point under the influence of long-term vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of battery steel shells, and in particular to a lithium battery steel shell. Background Art

[0002] Lithium batteries are batteries with metallic lithium as the negative electrode. Currently, the cylindrical lithium battery shells on the market are mostly made of steel. For cylindrical steel-shelled lithium batteries, the shell is generally the negative electrode and the cap end is the positive electrode. The negative electrode is the energy storage welding machine that uses a welding needle to weld the negative electrode ear of the battery cell to the bottom of the steel shell.

[0003] During the assembly process of the core and the steel shell, there is a little gap between the outer diameter of the core and the inner diameter of the steel shell for normal assembly, so the core still has room to move inside the steel shell. When this type of battery is used in an electric vehicle, since the electric vehicle will inevitably vibrate during driving, over time, relying only on one welding point to prevent vibration may cause the welding point to break, resulting in the problem of the battery being unable to be used normally. Therefore, there is a lack of a lithium battery steel shell with a core positioning and stabilization function. Summary of the invention

[0004] In order to solve the problems mentioned in the above background technology, a lithium battery steel shell is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A lithium battery steel shell comprises an outer shell, a fixing plate fixedly connected to the bottom of the outer shell, an inner shell fixedly connected to the top of the fixing plate, a moving rod slidably connected to the fixing plate around, a pressure rod passing through the inner shell fixedly connected to the inner side of the moving rod, a bottom rod fixedly connected to the inner side of the bottom of the moving rod, a second threaded rod connected to the bottom of the outer shell by threaded engagement, a connecting rod rotatably connected to the top of the second threaded rod, a free end of the connecting rod is rotatably connected to the bottom rod, a cover plate is detachably connected to the top of the outer shell, a first positioning mechanism is provided inside the outer shell, a second positioning mechanism is provided on the cover plate, and the first positioning mechanism and the second positioning mechanism are connected to realize the connection between the outer shell and the cover plate.

[0007] As a further description of the above technical solution:

[0008] The first positioning mechanism includes a top rod fixedly connected to the outer side of the top of the moving rod, a first positioning rod is slidably connected to the top rod, a gear connecting rod is rotatably installed on the outer shell, the free end of the gear connecting rod is rotatably connected to the first positioning rod, the first positioning rod is connected to the second positioning mechanism after passing through the cover plate, and the outer shell has a first driving mechanism that drives the gear connecting rod to rotate.

[0009] As a further description of the above technical solution:

[0010] The first driving mechanism includes a third threaded rod rotatably mounted on the outer shell, the free end of the third threaded rod is rotatably connected to a rack meshing with the gear connecting rod, and the outer side of the moving rod is fixedly connected to a guide rod sleeved inside the rack.

[0011] As a further description of the above technical solution:

[0012] The second positioning mechanism includes a fixed block fixedly connected to the cover plate, a second positioning rod passing through the first positioning rod is slidably connected to the fixed block, one end of the adjacent second positioning rod is rotatably connected by an arc rod, and a second driving mechanism for driving the two arc rods to move relative to each other is provided on the cover plate.

[0013] As a further description of the above technical solution:

[0014] The second driving mechanism comprises a first threaded rod threadably connected to the cover plate, an elliptical rod tangent to the arc-shaped rods on both sides is sleeved on the outer side of the first threaded rod, and the arc-shaped rods are fixedly connected by springs.

[0015] As a further description of the above technical solution:

[0016] The bottom of the first threaded rod is connected with a pressing plate, and the bottom of the pressing plate is bonded with a rubber layer.

[0017] As a further description of the above technical solution:

[0018] The top rod and the cover plate are respectively provided with a first through hole and a second through hole matched with the first positioning rod, and the first positioning rod is provided with a third through hole matched with the second positioning rod.

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

[0020] The fixing plate is provided with a sliding groove matched with the moving rod, and the bottom of the fixing plate is provided with a threaded hole connected with the second threaded rod.

[0021] As a further description of the above technical solution:

[0022] A telescopic rod is fixedly connected to the bottom of the outer shell, and a free end of the telescopic rod is fixedly connected to the bottom of the moving rod.

[0023] As a further description of the above technical solution:

[0024] The free end of the pressure rod is rotatably connected with a friction wheel.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In the present invention, the winding core is placed in the inner shell, and the bottom of the winding core and the fixed plate are connected by welding. The second threaded rod is rotated to connect with the threaded hole. When the second threaded rod moves, the linkage rod is driven to move upward, and then the moving rod and the pressure rod are pulled by the bottom rod to move close to the winding core. Under the action of the friction wheel, the winding core is fixed inside the inner shell, which increases the connection stability between the winding core and the inner shell, and avoids the problem of the battery not being able to be used normally due to the breakage of the welding point caused by long-term vibration.

[0027] 2. In the present invention, the rack is driven to move inward by rotating the third threaded rod. According to the meshing transmission principle of the latch teeth, the gear connecting rod is driven to rotate counterclockwise, thereby driving the first positioning rod to move upward, passing through the first through hole and the second through hole in sequence, connecting the outer shell and the cover plate, and then rotating the first threaded rod to drive the elliptical rod to move downward. When the long axis end of the elliptical rod contacts the arc rod, the second positioning rod is pushed outward to pass through the third through hole to position the outer shell and the cover plate. Similarly, when removing the cover plate, the first threaded rod is rotated to drive the elliptical rod to move upward. When the long axis end of the elliptical rod is separated from the contact with the arc rod, under the elastic action of the spring, the two arc rods are driven to move closer to each other, so that the second positioning rod is separated from the first positioning rod, and then the cover plate is pulled upward, that is, the disassembly of the cover plate is completed, and then the winding core is disassembled, which is convenient for the secondary recycling of the battery steel shell and saves resources.

[0028] 3. In the present invention, when the first threaded rod moves, it drives the pressing plate to press the winding core against the fixed plate from above, thereby further improving the placement stability of the winding core and preventing the winding core from moving upward and causing the welding point to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the internal structure of a lithium battery steel shell provided according to an embodiment of the present invention is shown;

[0030] Figure 2 A schematic top view of the AA portion of a lithium battery steel shell provided according to an embodiment of the present invention is shown;

[0031] Figure 3 A schematic top view of a lithium battery steel shell at a position BB provided according to an embodiment of the present invention is shown;

[0032] Figure 4 A bottom view schematically shows a support plate of a lithium battery steel shell provided in accordance with an embodiment of the present invention;

[0033] Figure 5 A partial cross-sectional schematic diagram of a lithium battery steel shell provided according to an embodiment of the present invention is shown;

[0034] Figure 6 A schematic top view of a lithium battery steel shell provided according to an embodiment of the present invention is shown.

[0035] Legend:

[0036] 1. Outer shell; 2. Telescopic rod; 3. Fixed plate; 4. Moving rod; 5. Pressing rod; 6. Third threaded rod; 7. Gear connecting rod; 8. Push rod; 9. First positioning rod; 10. Second positioning rod; 11. Fixed block; 12. Elliptical rod; 13. First threaded rod; 14. Pressing plate; 15. Rubber layer; 16. Cover plate; 17. Friction wheel; 18. Slide groove; 19. Bottom rod; 20. Linking rod; 21. Second threaded rod; 22. Rack; 23. Guide rod; 24. Inner shell; 25. First through hole; 26. Second through hole; 27. Third through hole; 28. Arc rod; 29. ​​Spring; 30. Threaded hole. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] See also Figure 1-6The present invention provides a technical solution: a lithium battery steel shell, comprising an outer shell 1, a fixed plate 3 is fixedly connected to the bottom of the outer shell 1, an inner shell 24 is fixedly connected to the top of the fixed plate 3, a moving rod 4 is slidably connected to the fixing plate 3 around, a pressure rod 5 passing through the inner shell 24 is fixedly connected to the inner side of the moving rod 4, a friction wheel 17 is rotatably connected to the free end of the pressure rod 5, a bottom rod 19 is fixedly connected to the inner side of the bottom of the moving rod 4, a second threaded rod 21 is screwed to the bottom of the outer shell 1 through a threaded connection, a connecting rod 20 is rotatably connected to the top of the second threaded rod 21 around, a bearing is rotatably connected to the outer side of the second threaded rod 21, an inner ring of the bearing is fixedly connected to the second threaded rod 21, an outer ring is rotatably connected to the connecting rod 20, the inner ring and the outer ring are connected by a ball rolling connection to ensure that when the second threaded rod 21 rotates, the connecting rod 20 will not rotate synchronously, the free end of the connecting rod 20 is rotatably connected to the bottom rod 19, the top of the outer shell 1 The outer shell 1 is detachably connected to a cover plate 16, a first positioning mechanism is provided inside the outer shell 1, and a second positioning mechanism is provided on the cover plate 16. The first positioning mechanism and the second positioning mechanism are connected to realize the connection between the outer shell 1 and the cover plate 16. The fixed plate 3 is provided with a slide groove 18 adapted to the movable rod 4, and a threaded hole 30 connected to the second threaded rod 21 is provided at the bottom of the fixed plate 3. The winding core is placed in the inner shell 24, and the bottom of the winding core and the fixed plate 3 are connected by welding. The second threaded rod 21 is rotated to connect with the threaded hole 30. When the second threaded rod 21 moves, the linkage rod 20 is driven to move upward, and then the movable rod 4 and the pressure rod 5 are pulled close to the winding core through the bottom rod 19 to move. Under the action of the friction wheel 17, the winding core is fixed inside the inner shell 24, so as to increase the connection stability between the winding core and the inner shell 24, and avoid the problem of the battery not being able to be used normally due to the breakage of the welding point under the influence of long-term vibration.

[0040] See also Figure 1 and Figure 5 The first positioning mechanism includes a top rod 8 fixedly connected to the outer side of the top of the moving rod 4, a first positioning rod 9 is slidably connected to the top rod 8, a gear connecting rod 7 is rotatably installed on the outer shell 1, a free end of the gear connecting rod 7 is rotatably connected to the first positioning rod 9, the first positioning rod 9 passes through the cover plate 16 and is connected to the second positioning mechanism, and the outer shell 1 has a first driving mechanism that drives the gear connecting rod 7 to rotate;

[0041] The first driving mechanism includes a third threaded rod 6 rotatably mounted on the outer shell 1 , the free end of the third threaded rod 6 is rotatably connected to a rack 22 meshing with the gear connecting rod 7 , and the outer side of the moving rod 4 is fixedly connected to a guide rod 23 sleeved inside the rack 22 .

[0042] See also Figure 1 and Figure 6The second positioning mechanism includes a fixed block 11 fixedly connected to the cover plate 16, and a second positioning rod 10 passing through the first positioning rod 9 is slidably connected to the fixed block 11. A first through hole 25 and a second through hole 26 adapted to the first positioning rod 9 are respectively opened on the top rod 8 and the cover plate 16. The first positioning rod 9 has a third through hole 27 adapted to the second positioning rod 10. One end of the adjacent second positioning rod 10 is rotatably connected through an arc rod 28. The cover plate 16 is provided with a second driving mechanism for driving the two arc rods 28 to move relative to each other;

[0043] The second driving mechanism includes a first threaded rod 13 threadedly connected to the cover plate 16 , an elliptical rod 12 tangent to the arc rods 28 on both sides is sleeved on the outside of the first threaded rod 13 , and the arc rods 28 are fixedly connected by springs 29 .

[0044] Specifically, first, the rack 22 is driven to move inward by rotating the third threaded rod 6. According to the meshing transmission principle of the latch teeth, the gear connecting rod 7 is driven to rotate counterclockwise, thereby driving the first positioning rod 9 to move upward, passing through the first through hole 25 and the second through hole 26 in sequence, and connecting the outer shell 1 and the cover plate 16. Then, the first threaded rod 13 is rotated to drive the elliptical rod 12 to move downward. When the long axis end of the elliptical rod 12 contacts the arc rod 28, the second positioning rod 10 is pushed outward to pass through the third through hole 27 to position the outer shell 1 and the cover plate 16. Similarly, when removing the cover plate 16, the first threaded rod 13 is rotated to drive the elliptical rod 12 to move upward. When the long axis end of the elliptical rod 12 is out of contact with the arc rod 28, under the elastic action of the spring 29, the two arc rods 28 are driven to move closer to each other, so that the second positioning rod 10 is separated from the first positioning rod 9, and then the cover plate 16 is pulled up, that is, the disassembly of the cover plate 16 is completed, and then the winding core is disassembled, which is convenient for the secondary recycling of the battery steel shell and saves resources.

[0045] See also Figure 1 A pressure plate 14 is connected to the bottom of the first threaded rod 13, and a rubber layer 15 is bonded to the bottom of the pressure plate 14. When the first threaded rod 13 moves, it drives the pressure plate 14 to press the winding core onto the fixed plate 3 from above, further improving the placement stability of the winding core and preventing the winding core from moving upward and causing the welding point to break.

[0046] See also Figure 1 and Figure 2 A telescopic rod 2 is fixedly connected to the bottom of the outer shell 1, and the free end of the telescopic rod 2 is fixedly connected to the bottom of the moving rod 4 to improve the movement stability of the moving rod 4.

[0047] Working principle: When in use, first, by rotating the second threaded rod 21 to connect with the threaded hole 30, while the second threaded rod 21 moves, the linkage rod 20 is driven to move upward, and then the moving rod 4 and the pressure rod 5 are pulled by the bottom rod 19 to move close to the winding core. Under the action of the friction wheel 17, the winding core is fixed inside the inner shell 24, increasing the connection stability between the winding core and the inner shell 24, and avoiding the problem of the battery not being able to be used normally due to the breakage of the welding point caused by long-term vibration;

[0048] Secondly, the cover plate 16 is placed on the top of the outer shell 1. Then, the rack 22 is driven to move inward by rotating the third threaded rod 6. According to the meshing transmission principle of the latch teeth, the gear connecting rod 7 is driven to rotate counterclockwise, thereby driving the first positioning rod 9 to move upward, passing through the first through hole 25 and the second through hole 26 in sequence, connecting the outer shell 1 and the cover plate 16. Then, the first threaded rod 13 is rotated to drive the elliptical rod 12 to move downward. When the long axis end of the elliptical rod 12 contacts the arc rod 28, the second positioning rod 10 is pushed outward to pass through the arc rod 28. Through the third through hole 27, the outer shell 1 and the cover plate 16 are positioned. Similarly, when the cover plate 16 is removed, the first threaded rod 13 is rotated to drive the elliptical rod 12 to move upward. When the long axis end of the elliptical rod 12 is out of contact with the arc rod 28, the two arc rods 28 are driven to move closer to each other under the elastic action of the spring 29, so that the second positioning rod 10 is separated from the first positioning rod 9, and then the cover plate 16 is pulled up, that is, the removal of the cover plate 16 is completed, and then the winding core is removed, which is convenient for the secondary recycling of the battery steel shell and saves resources;

[0049] When the first threaded rod 13 moves, it drives the pressing plate 14 to press the winding core onto the fixing plate 3 from above, so as to further improve the placement stability of the winding core and prevent the winding core from moving upward and causing the welding point to break.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium battery steel shell, comprising an outer shell (1), characterized in that: The bottom of the outer shell (1) is fixedly connected with a fixing plate (3), the top of the fixing plate (3) is fixedly connected with an inner shell (24), the fixing plate (3) is slidably connected with a moving rod (4) around, the inner side of the moving rod (4) is fixedly connected with a pressure rod (5) passing through the inner shell (24), the inner side of the bottom of the moving rod (4) is fixedly connected with a bottom rod (19), the bottom of the outer shell (1) is screwed with a second threaded rod (21) through a thread, the top of the second threaded rod (21) is rotatably connected with a connecting rod (20), the free end of the connecting rod (20) is rotatably connected with the bottom rod (19), the top of the outer shell (1) is detachably connected with a cover plate (16), a first positioning mechanism is provided inside the outer shell (1), and a second positioning mechanism is provided on the cover plate (16), the first positioning mechanism and the second positioning mechanism are connected to realize the connection between the outer shell (1) and the cover plate (16); The first positioning mechanism comprises a top rod (8) fixedly connected to the outer side of the top of the moving rod (4), a first positioning rod (9) being slidably connected to the top rod (8), a gear connecting rod (7) being rotatably mounted on the outer shell (1), a free end of the gear connecting rod (7) being rotatably connected to the first positioning rod (9), the first positioning rod (9) being connected to the second positioning mechanism after passing through the cover plate (16), and a first driving mechanism for driving the gear connecting rod (7) to rotate is provided on the outer shell (1); The first driving mechanism comprises a third threaded rod (6) rotatably mounted on the outer shell (1), the free end of the third threaded rod (6) being rotatably connected to a rack (22) meshingly connected to the gear connecting rod (7), and the outer side of the moving rod (4) being fixedly connected to a guide rod (23) sleeved inside the rack (22); The second positioning mechanism comprises a fixed block (11) fixedly connected to the cover plate (16), a second positioning rod (10) passing through the first positioning rod (9) being slidably connected to the fixed block (11), one end of an adjacent second positioning rod (10) being rotatably connected via an arc rod (28), and a second driving mechanism for driving the two arc rods (28) to move relative to each other is provided on the cover plate (16); The second driving mechanism comprises a first threaded rod (13) threadedly connected to the cover plate (16); an elliptical rod (12) tangent to arc-shaped rods (28) on both sides is sleeved on the outside of the first threaded rod (13); the arc-shaped rods (28) are fixedly connected by springs (29).

2. A lithium battery steel shell according to claim 1, characterized in that: The bottom of the first threaded rod (13) is connected to a pressing plate (14), and the bottom of the pressing plate (14) is bonded with a rubber layer (15).

3. A lithium battery steel shell according to claim 2, characterized in that: The top rod (8) and the cover plate (16) are respectively provided with a first through hole (25) and a second through hole (26) adapted to the first positioning rod (9), and the first positioning rod (9) is provided with a third through hole (27) adapted to the second positioning rod (10).

4. A lithium battery steel shell according to claim 1, characterized in that: The fixing plate (3) is provided with a sliding groove (18) adapted to the moving rod (4), and the bottom of the fixing plate (3) is provided with a threaded hole (30) connected to the second threaded rod (21).

5. A lithium battery steel shell according to claim 1, characterized in that: A telescopic rod (2) is fixedly connected to the bottom of the outer shell (1), and a free end of the telescopic rod (2) is fixedly connected to the bottom of the moving rod (4).

6. A lithium battery steel shell according to claim 1, characterized in that: The free end of the pressure rod (5) is rotatably connected to a friction wheel (17).

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