Lithium battery top cover structure with high sealing performance

Abstract

The utility model relates to the technical field of lithium battery top covers, and discloses a lithium battery top cover structure with high sealing performance, which comprises a top cover main body and an anti-loosening sealing assembly, two groups of through holes are symmetrically formed in the top cover main body, and electrode columns are arranged in the through holes. The anti-loosening sealing assembly comprises a circular ring arranged outside the electrode column in a sleeving mode, a sealing ring is fixedly connected to the inner side face of the circular ring, annular elastic rubber is fixedly connected to the bottom of the circular ring, two sets of protruding blocks are symmetrically and fixedly connected to the outer portion of the circular ring, and a containing groove is formed in the top of the penetrating opening. Clamping grooves are formed in the positions, corresponding to the protruding blocks, of the containing grooves. According to the utility model, the problem that the sealing effect is reduced due to the fact that the compression nut or the fixed joint of the gland and the top cover is easy to rust is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery top cover technology, and in particular to a lithium battery top cover structure with high sealing performance. Background Technology

[0002] A lithium battery top cover is a protective covering that directly covers the positive and negative electrodes of a lithium battery. Its main function is to protect the positive and negative electrodes and the electrolyte. Lithium battery top covers are widely used in various electronic products, including mobile phones, laptops, smartwatches, wearable devices, and drones.

[0003] Most existing lithium battery top cover structures use sealing rings to seal the connection between the electrode post and the top cover, and then use clamping nuts or covers to tighten and fix it to improve the sealing effect. However, the connection between the clamping nuts or covers and the top cover is prone to loosening due to long-term corrosion, which reduces the sealing effect at the connection between the electrode post and the top cover. Therefore, we provide a lithium battery top cover structure with high sealing performance. Utility Model Content

[0004] To address the problem in the aforementioned background technology that the clamping nut or the fixed connection between the pressure cap and the top cover is prone to corrosion, resulting in a reduced sealing effect, this utility model provides a lithium battery top cover structure with high sealing performance.

[0005] This utility model is achieved by the following technical solution: a high-sealing lithium battery top cover structure, including a top cover body and an anti-loosening sealing component, wherein two sets of through holes are symmetrically opened on the top cover body, and electrode posts are arranged in the through holes.

[0006] The anti-loosening sealing assembly includes a ring sleeved on the outside of the electrode post. A sealing ring is fixedly connected to the inner side of the ring, and an annular elastic rubber is fixedly connected to the bottom of the ring. Two sets of protrusions are symmetrically fixedly connected to the outside of the ring. A placement groove is provided at the top of the through-hole, and a slot is provided on the placement groove corresponding to the position of the protrusion.

[0007] As a further improvement to the above solution, a pressure cap is added to the top of the ring, and the pressure cap is fixedly connected to the top cover body by fixing bolts.

[0008] As a further improvement to the above solution, two sets of screw holes are symmetrically opened on both sides of the top of the main body of the top cover.

[0009] As a further improvement to the above solution, two sets of vertical rods are fixedly connected to the top of the ring.

[0010] As a further improvement to the above solution, the pressure cap is provided with two sets of grooves.

[0011] As a further improvement to the above solution, the longitudinal section of the card slot is designed as an L-shaped structure.

[0012] As a further improvement to the above solution, the diameter of the placement groove is the same as the diameter of the ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention involves placing a ring with a sealing ring around the outside of the electrode post and pressing it into the placement groove. At this time, the annular elastic rubber is compressed, and the protrusion enters the slot. By pulling the vertical rod, the ring rotates clockwise, causing the protrusion to move to the innermost side of the slot. When the compression of the ring stops, the rebound effect of the annular elastic rubber causes the protrusion to press against the inside of the slot. In this way, even if the pressure cap loosens and loses its pressing effect on the ring, it can still ensure the sealing effect at the connection between the electrode post and the top cover, making it highly practical. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the anti-loosening sealing assembly of this utility model;

[0017] Figure 3 This is a top-view three-dimensional structural diagram of the circular ring of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the circular ring of this utility model viewed from below;

[0019] Figure 5 This is a three-dimensional structural diagram of the top cover body of this utility model.

[0020] Explanation of key symbols:

[0021] 1. Top cover body; 2. Through opening; 3. Electrode post; 4. Pressure cap; 5. Screw hole; 101. Ring; 102. Sealing ring; 103. Annular elastic rubber; 104. Protrusion; 105. Placement groove; 106. Slot; 107. Vertical rod. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Example 1

[0023] Please combine Figure 1-5The high-sealing lithium battery top cover structure of this embodiment includes a top cover body 1, on which two sets of through holes 2 are symmetrically opened, and electrode posts 3 are arranged in the through holes 2.

[0024] An anti-loosening sealing assembly for improving sealing effect includes a ring 101 sleeved on the outside of the electrode post 3. A sealing ring 102 is fixedly connected to the inner side of the ring 101. An annular elastic rubber 103 is fixedly connected to the bottom of the ring 101. Two sets of protrusions 104 are symmetrically fixedly connected to the outside of the ring 101. A placement groove 105 is opened at the top of the through-hole 2. A slot 106 is opened on the placement groove 105 corresponding to the position of the protrusion 104. A pressure cap 4 is added to the top of the ring 101 and the pressure cap 4 is fixedly connected to the top cover body 1 by fixing bolts. Two sets of screw holes 5 are symmetrically opened on both sides of the top of the top cover body 1. Two sets of vertical rods 107 are fixedly connected to the top of the ring 101 to facilitate the rotation of the ring 101. Two sets of grooves are opened on the pressure cap 4 to prevent the vertical rods 107 from affecting the pressure cap 4 on the ring 101. The longitudinal section of the slot 106 is an L-shaped structure design.

[0025] The implementation principle of a high-sealing lithium battery top cover structure in this application embodiment is as follows: First, a ring 101 with a sealing ring 102 is fitted onto the outside of the electrode post 3 and moved to a position close to the placement groove 105. Then, the protrusion 104 is aligned with the opening of the slot 106, and the ring 101 is then pressed into the placement groove 105. At this time, the annular elastic rubber 103 will be compressed, and the protrusion 104 will enter the slot 106. Afterward, the ring 101 is rotated clockwise by the vertical rod 107. 1. This causes the protrusion 104 to move to the innermost side of the slot 106. When the pressure on the ring 101 stops, the rebound effect of the annular elastic rubber 103 causes the protrusion 104 to press against the inside of the slot 106. Finally, the pressure cap 4 presses down on the ring 101 and connects and fixes it to the top cover body 1 with the fixing bolts. When the fixing bolts loosen, the sealing effect at the connection between the electrode post 3 and the top cover is still guaranteed because the protrusion 104 is pressed against the inside of the slot 106. Example 2

[0026] The further improvement of this embodiment based on embodiment 1 is that the diameter of the placement groove 105 is consistent with the diameter of the ring 101 to avoid gaps.

[0027] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A highly airtight lithium battery top cover structure, characterized in that, include: The top cover body (1) has two sets of through openings (2) symmetrically opened on the top cover body (1), and electrode posts (3) are provided in the through openings (2). The anti-loosening sealing assembly includes a ring (101) sleeved on the outside of the electrode post (3), a sealing ring (102) fixedly connected to the inner side of the ring (101), an annular elastic rubber (103) fixedly connected to the bottom of the ring (101), two sets of protrusions (104) symmetrically fixedly connected to the outside of the ring (101), a placement groove (105) is provided at the top of the through opening (2), and a slot (106) is provided on the placement groove (105) corresponding to the position of the protrusion (104).

2. The high-sealing lithium battery top cover structure as described in claim 1, characterized in that, The top of the ring (101) is provided with a pressure cap (4), and the pressure cap (4) is fixedly connected to the top cover body (1) by fixing bolts.

3. The high-sealing lithium battery top cover structure as described in claim 1, characterized in that, The top cover body (1) has two sets of screw holes (5) symmetrically opened on both sides of the top.

4. The high-sealing lithium battery top cover structure as described in claim 2, characterized in that, Two sets of vertical rods (107) are fixedly connected to the top of the ring (101).

5. The high-sealing lithium battery top cover structure as described in claim 2, characterized in that, The pressure cap (4) has two sets of grooves.

6. The high-sealing lithium battery top cover structure as described in claim 1, characterized in that, The longitudinal section of the slot (106) is an L-shaped structure design.

7. The high-sealing lithium battery top cover structure as described in claim 1, characterized in that, The diameter of the placement groove (105) is the same as the diameter of the ring (101).

Images