Lithium ion battery pole welding shockproof structure

Abstract

The utility model relates to a lithium ion battery pole welding shockproof structure, which belongs to the technical field of lithium ion batteries, and comprises a box body I, a battery cell and an electrode pole, and a side shock absorption mechanism is mounted on the inner side wall of the box body I. According to the utility model, the side damping mechanism, the bottom damping mechanism, the connecting ring and the rubber sleeve are matched for use, so that when an automobile vibrates, the side damping mechanism is matched with the rubber sleeve to buffer and absorb each vibration generated by the lithium ion battery in the horizontal direction; the bottom damping mechanism is matched with the rubber sleeve to buffer and absorb vibration generated by the lithium ion battery in the vertical direction, and in addition, when the electrode column is impacted, the rubber ring can buffer and absorb impact force, so that good protection on the welding part of the electrode column and the battery cell is realized, and the service life of the lithium ion battery is prolonged. The welding part of the battery cell and the electrode column is prevented from loosening and falling off, the normal use of the lithium ion battery is ensured, and the service life of the lithium ion battery is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a shockproof structure for welding lithium-ion battery terminals. Background Technology

[0002] Lithium-ion batteries, commonly known as rocking chair batteries, are a general term for batteries that use lithium-ion intercalation compounds as the positive electrode material. They are a type of rechargeable battery that primarily functions by the movement of lithium ions between the positive and negative electrodes. A lithium-ion battery consists of a positive electrode, a negative electrode, an electrolyte, a separator, positive and negative leads, a battery casing, and safety devices. During charging and discharging, Li+ ions repeatedly insert and extract between the two electrodes: during charging, Li+ ions extract from the positive electrode, pass through the electrolyte, and insert into the negative electrode, leaving the negative electrode in a lithium-rich state; the reverse occurs during discharging. Mobile phones and laptops use lithium-ion batteries, commonly referred to as lithium batteries. Lithium batteries intercalate lithium ions into carbon (petroleum coke and graphite) to form the negative electrode (traditional lithium batteries use lithium or lithium alloys as the negative electrode). Common positive electrode materials include LixCoO2, LixNiO2, and LixMnO4, while the electrolyte uses Lix... PF6 + diethylene carbonate (EC) + dimethyl carbonate (DMC); petroleum coke and graphite are non-toxic and abundant resources for anode materials. Lithium ions are intercalated into carbon, overcoming the high activity of lithium and solving the safety problems of traditional lithium batteries. The cathode LixCoO2 can achieve high levels in charge and discharge performance and lifespan, reducing costs. In short, the overall performance of lithium-ion batteries is improved.

[0003] In existing lithium-ion batteries, the cells are connected to the positive and negative terminals by welding. However, during the use of lithium-ion batteries installed in automobiles, the vibration of the vehicle can cause the welded joints between the cells and the positive and negative terminals to loosen and fall off, affecting the normal use of the lithium-ion battery. Based on this, a shockproof structure for welding lithium-ion battery terminals is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a simple and reasonably designed shockproof structure for welding lithium-ion battery terminals in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A shock-resistant structure for welding electrode posts of a lithium-ion battery includes a first housing, a second housing, bolts, battery cells, and electrode posts. The inner wall of the first housing is equipped with a side shock-absorbing mechanism, and the bottom of the first housing is equipped with a bottom shock-absorbing mechanism. The battery cells are installed within the side and bottom shock-absorbing mechanisms. Dustproof nets are installed on both sides of the first housing. The top of the second housing has an installation groove, and a rubber sleeve is fixedly connected to the inner wall of the installation groove. A connecting ring is fixedly connected inside the rubber sleeve. A fixing ring is fixedly connected to the outer surface of the electrode post, with the fixing ring positioned at the bottom of the connecting ring. The connecting ring is fitted onto the outer surface of the electrode post. A heat dissipation mechanism is installed on the top of the second housing.

[0007] As a further optimization of this utility model, the side damping mechanism includes a side damping rod fixedly connected to the inner side wall of the housing, a side damping spring sleeved on the outer surface of the side damping rod, a clamping plate fixedly connected to the end of the side damping rod, the top of the clamping plate being inclined, the two ends of the side damping spring being fixedly connected to the housing and the clamping plate respectively, and the side wall of the battery cell being in contact with the clamping plate.

[0008] As a further optimization of this utility model, the bottom shock absorption mechanism includes a bottom damping rod fixedly connected to the bottom of the housing, a bottom damping spring sleeved on the outer surface of the bottom damping rod, a placement plate fixedly connected to the top of the bottom damping rod, and the two ends of the bottom damping spring fixedly connected to the housing and the placement plate respectively. The battery cell is placed on the top of the placement plate.

[0009] As a further optimization of this utility model, the heat dissipation mechanism includes an air extraction cylinder fixedly connected to the top of the housing. A fixed frame is fixedly connected to the top of the air extraction cylinder, a motor is installed in the middle of the fixed frame, a rotating shaft is fixedly connected to the output end of the motor, a fan blade is fixedly connected to the outer wall of the rotating shaft, the fan blade is located inside the air extraction cylinder, the rotating shaft is rotatably connected to the air extraction cylinder, a filter screen is slidably connected inside the air extraction cylinder, connecting plates are fixedly connected to both sides of the filter screen, a movable rod is slidably connected inside the connecting plates, a movable ring is fixedly connected to the bottom of the movable rod, and a limit plate is fixedly connected to the outer wall of the movable rod.

[0010] As a further optimization of this utility model, the movable ring is disposed on the top of the connecting ring and is magnetically connected to the connecting ring. The movable ring is sleeved on the outer surface of the electrode post, and the rotating shaft passes through the filter screen and is movably connected to the filter screen.

[0011] As a further optimization of this utility model, the first box and the second box are connected by bolts, and the free end of the electrode post extends out of the top of the second box.

[0012] The beneficial effects of this utility model are as follows: By using the side damping mechanism, bottom damping mechanism, connecting ring, and rubber sleeve in combination, this utility model enables the side damping mechanism and rubber sleeve to buffer and absorb various vibrations generated by the lithium-ion battery in the horizontal direction when the car vibrates. The bottom damping mechanism and rubber sleeve can buffer and absorb the vertical vibrations generated by the lithium-ion battery. In addition, when the electrode post is impacted, the rubber ring can buffer and absorb the impact force, thereby achieving good protection for the welding part between the electrode post and the cell, preventing the welding part between the cell and the electrode post from loosening and falling off, ensuring the normal use of the lithium-ion battery, and extending the service life of the lithium-ion battery. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0014] Figure 2 This is a three-dimensional partial cross-sectional structural diagram of this utility model;

[0015] Figure 3 This is a schematic diagram of the frontal cross-section of this utility model;

[0016] Figure 4 This is the utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Box 1; 2. Box 2; 3. Bolt; 4. Battery cell; 5. Electrode post; 6. Side damping rod; 7. Side damping spring; 8. Clamping plate; 9. Bottom damping rod; 10. Bottom damping spring; 11. Placement plate; 12. Dustproof net; 13. Air extraction cylinder; 14. Fixing frame; 15. Motor; 16. Shaft; 17. Fan blade; 18. Filter screen; 19. Mounting groove; 20. Rubber sleeve; 21. Connecting ring; 22. Fixing ring; 23. Movable ring; 24. Movable rod; 25. Limiting plate; 26. Connecting plate. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a shock-absorbing structure for welding electrode posts of a lithium-ion battery includes a housing 1, a housing 2, bolts 3, a battery cell 4, and electrode posts 5. Housing 1 and housing 2 are connected by bolts 3. The free end of the electrode post 5 extends out of the top of housing 2. A side shock-absorbing mechanism is installed on the inner wall of housing 1, and a bottom shock-absorbing mechanism is installed on the inner bottom of housing 1. The battery cell 4 is installed in the side shock-absorbing mechanism and the bottom shock-absorbing mechanism. Dustproof nets 12 are installed on both sides of housing 1. The dustproof nets 12 are designed to prevent external dust from passing through when the lithium-ion battery is not working. 12 enters the first box 1 and the second box 2, and adheres to the outer surface of the battery cell 4 and the electrode post 5, affecting the battery cell 4 and the electrode post 5, thus protecting the battery cell 4 and the electrode post 5. The top of the second box 2 is provided with an installation groove 19, and a rubber sleeve 20 is fixedly connected to the inner wall of the installation groove 19. A connecting ring 21 is fixedly connected inside the rubber sleeve 20. A fixing ring 22 is fixedly connected to the outer surface of the electrode post 5. The fixing ring 22 is located at the bottom of the connecting ring 21. The connecting ring 21 is sleeved on the outer surface of the electrode post 5. A heat dissipation mechanism is installed on the top of the second box 2.

[0021] When in use, first install the battery cell 4 inside the bottom shock absorption mechanism and the side shock absorption mechanism, then cover the top of the housing 2 with the housing 1. During this process, align the electrode post 5 with the connecting ring 21 and insert the electrode post 5 into the connecting ring 21. Finally, fix the housing 2 to the housing 1 with the bolts 3. When the lithium-ion battery is working, the heat dissipation mechanism is activated to dissipate heat from the battery cell 4. The hot air generated by the heat dissipation mechanism to the battery cell 4 inside the housing 1 and housing 2 will be discharged into the external environment through the dustproof net 12. When the lithium-ion battery stops working, the heat dissipation mechanism stops working.

[0022] like Figure 2 and Figure 3 As shown, the side damping mechanism includes a side damping rod 6 fixedly connected to the inner side wall of the housing 1, a side damping spring 7 sleeved on the outer surface of the side damping rod 6, a clamping plate 8 fixedly connected to the end of the side damping rod 6, the top of the clamping plate 8 being inclined, the two ends of the side damping spring 7 being fixedly connected to the housing 1 and the clamping plate 8 respectively, and the side wall of the battery cell 4 being in contact with the clamping plate 8. The bottom damping mechanism includes a bottom damping rod 9 fixedly connected to the bottom of the housing 1, a bottom damping spring 10 sleeved on the outer surface of the bottom damping rod 9, a placement plate 11 fixedly connected to the top of the bottom damping rod 9, the two ends of the bottom damping spring 10 being fixedly connected to the housing 1 and the placement plate 11 respectively, and the battery cell 4 being placed on the top of the placement plate 11.

[0023] When the car vibrates, causing the lithium-ion battery to vibrate, the side damping spring 7, side damping rod 6, and clamping plate 8 buffer and absorb the horizontal vibration generated by the cell 4. In addition, the bottom damping rod 9, bottom damping spring 10, and placement plate 11 buffer and absorb the vertical vibration generated by the cell 4. At the same time, the rubber sleeve 20 buffers and absorbs the vibration generated by the electrode post 5. When the electrode post 5 is hit by external impact, the rubber sleeve 20 buffers and absorbs the impact force on the electrode post 5. This provides good protection for the welded joint between the electrode post 5 and the cell 4, prevents the welded joint between the cell 4 and the electrode post 5 from loosening and falling off, ensures the normal use of the lithium-ion battery, and extends the service life of the lithium-ion battery.

[0024] When installing the battery cell 4, since the top of the clamping plate 8 is inclined, the battery cell 4 can squeeze and push the clamping plate 8 to slide outward, so that the battery cell 4 enters the clamping plate 8 and is on top of the placement plate 11, which facilitates the installation and removal of the battery cell 4.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the heat dissipation mechanism includes an air extraction cylinder 13 fixedly connected to the top of the housing 2. A mounting bracket 14 is fixedly connected to the top of the air extraction cylinder 13. A motor 15 is installed in the middle of the mounting bracket 14. A rotating shaft 16 is fixedly connected to the output end of the motor 15. A fan blade 17 is fixedly connected to the outer wall of the rotating shaft 16. The fan blade 17 is located inside the air extraction cylinder 13. The rotating shaft 16 is rotatably connected to the air extraction cylinder 13. A filter screen 18 is slidably connected inside the air extraction cylinder 13. Connecting plates 26 are fixedly connected to both sides of the filter screen 18. A movable rod 24 is slidably connected inside the connecting plate 26. A movable ring 23 is fixedly connected to the bottom of the 4. A limiting plate 25 is fixedly connected to the outer wall of the movable rod 24. The movable ring 23 is set on the top of the connecting ring 21 and is magnetically connected to the connecting ring 21. The movable ring 23 is sleeved on the outer surface of the electrode post 5. The rotating shaft 16 passes through the filter screen 18 and is movably connected to the filter screen 18. The filter screen 18 can slide up and down on the outer surface of the rotating shaft 16. The rotating shaft 16 can rotate inside the filter screen 18. When the filter screen 18 slides up to the highest position, it will not be pulled out of the suction cylinder 13. The limiting plate 25 is set at the bottom of the connecting plate 26.

[0026] When the lithium-ion battery is working, the motor 15 is working, which will drive the fan blade 17 to rotate through the shaft 16. This causes the air pump 13 to draw outside air into the internal space composed of the second housing 2 and the first housing 1 after filtering it through the filter screen 18. The air then acts directly on the battery cell 4, carrying away the heat generated by the battery cell 4. The hot air will then be discharged into the outside environment through the dustproof net 12. This achieves good heat dissipation for the battery cell 4, preventing the battery cell 4 from overheating during operation and causing it to bulge, deform, or be damaged. This provides good protection for the battery cell 4 and extends its service life.

[0027] When the battery cell 4 vibrates vertically, the electrode post 5 vibrates along with the battery cell 4, causing the fixed ring 22 to move up and down. The up and down movement of the fixed ring 22 will push the connecting ring 21 to move up and down, which in turn will cause the movable ring 23 to move up and down. The up and down movement of the movable ring 23 will push the connecting plate 26 to move up and down through the movable rod 24 and the limiting plate 25, which will cause the filter screen 18 to move up and down, causing the filter screen 18 to shake slightly, shaking off the dust attached to the filter screen 18, preventing the filter screen 18 from clogging, thereby ensuring the heat dissipation quality and efficiency of the battery cell 4.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A shockproof structure for welding electrode posts of a lithium-ion battery, comprising a housing (1), a housing (2), bolts (3), a battery cell (4), and electrode posts (5), characterized in that: The inner wall of the first box (1) is equipped with a side shock-absorbing mechanism, and the bottom of the first box (1) is equipped with a bottom shock-absorbing mechanism. The battery cell (4) is installed in the side shock-absorbing mechanism and the bottom shock-absorbing mechanism. Dustproof nets (12) are installed on both sides of the first box (1). The top of the second box (2) is provided with an installation groove (19). The inner wall of the installation groove (19) is fixedly connected with a rubber sleeve (20). A connecting ring (21) is fixedly connected inside the rubber sleeve (20). A fixing ring (22) is fixedly connected to the outer surface of the electrode post (5). The fixing ring (22) is located at the bottom of the connecting ring (21). The connecting ring (21) is sleeved on the outer surface of the electrode post (5). A heat dissipation mechanism is installed on the top of the second box (2).

2. The shockproof structure for welding lithium-ion battery terminals according to claim 1, characterized in that: The side damping mechanism includes a side damping rod (6) fixedly connected to the inner side wall of the housing (1). A side damping spring (7) is sleeved on the outer surface of the side damping rod (6). A clamping plate (8) is fixedly connected to the end of the side damping rod (6). The top of the clamping plate (8) is inclined. The two ends of the side damping spring (7) are fixedly connected to the housing (1) and the clamping plate (8) respectively. The side wall of the battery cell (4) is in contact with the clamping plate (8).

3. The shockproof structure for welding lithium-ion battery terminals according to claim 1, characterized in that: The bottom damping mechanism includes a bottom damping rod (9) fixedly connected to the bottom of the housing (1). A bottom damping spring (10) is sleeved on the outer surface of the bottom damping rod (9). A placement plate (11) is fixedly connected to the top of the bottom damping rod (9). The two ends of the bottom damping spring (10) are fixedly connected to the housing (1) and the placement plate (11) respectively. The battery cell (4) is placed on the top of the placement plate (11).

4. The shock-resistant structure for welding lithium-ion battery terminals according to claim 1, characterized in that: The heat dissipation mechanism includes an air extraction cylinder (13) fixedly connected to the top of the housing (2). A fixed frame (14) is fixedly connected to the top of the air extraction cylinder (13). A motor (15) is installed in the middle of the fixed frame (14). A rotating shaft (16) is fixedly connected to the output end of the motor (15). A fan blade (17) is fixedly connected to the outer wall of the rotating shaft (16). The fan blade (17) is located inside the air extraction cylinder (13). The rotating shaft (16) is rotatably connected to the air extraction cylinder (13). A filter screen (18) is slidably connected inside the air extraction cylinder (13). A connecting plate (26) is fixedly connected to both sides of the filter screen (18). A movable rod (24) is slidably connected inside the connecting plate (26). A movable ring (23) is fixedly connected to the bottom of the movable rod (24). A limit plate (25) is fixedly connected to the outer wall of the movable rod (24).

5. The shockproof structure for welding lithium-ion battery terminals according to claim 4, characterized in that: The movable ring (23) is located on the top of the connecting ring (21) and is magnetically connected to the connecting ring (21). The movable ring (23) is sleeved on the outer surface of the electrode post (5). The rotating shaft (16) passes through the filter screen (18) and is movably connected to the filter screen (18).

6. The shockproof structure for welding lithium-ion battery terminals according to claim 1, characterized in that: The first box (1) and the second box (2) are connected by bolts (3), and the free end of the electrode post (5) extends out of the top of the second box (2).

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