Liquid injection hole sealing structure

Abstract

The utility model provides a liquid injection hole sealing structure. A convex groove is formed in the upper surface of a top cover; a through liquid injection hole is formed in the bottom of the convex groove; the cover plate is clamped in the convex groove in a sliding manner, and a through counterbore is formed in the surface of the cover plate; the spring is arranged in the convex groove, one end of the spring abuts against the side wall of the convex groove, the other end of the spring abuts against the side wall of the cover plate, and under the state that the spring is compressed without external force, the liquid injection hole and the counterbore are staggered; the screw is assembled in the counterbore; the cover plate is manually pushed to move leftwards, the spring is compressed, the liquid injection hole is communicated with the counterbore, the liquid injection hole and the counterbore are communicated or staggered under the action of the spring, and therefore the liquid supplementing state or the sealing state can be freely switched, multiple sealing is adopted, the sealing performance is good, the liquid injection hole and the counterbore are manually communicated by disassembling the screw, and the sealing effect is good. The device is convenient to operate, and can prevent the battery from leaking while supplementing liquid for the battery for the second time.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion batteries, in particular to a liquid injection hole sealing structure. Background Art

[0002] With the increasing popularity of new energy vehicles, the production and consumption of power batteries are increasing, and the market's requirements for batteries are becoming increasingly stringent. In particular, after the secondary injection of lithium-ion batteries, the injection hole needs to be sealed to maintain a negative pressure environment within the casing to prevent external gas and moisture from entering the battery cell.

[0003] Repeated charge and discharge processes of the battery will lead to electrolyte loss, resulting in a decline in battery performance. The electrolyte in the battery needs to be replenished to ensure that the battery continues to work normally.

[0004] In most existing processes, the injection hole is welded shut after the electrolyte is injected, making the seal non-detachable and the electrolyte unable to be replenished, resulting in a low battery reuse rate.

[0005] To this end, we propose a liquid injection hole sealing structure to solve the problem that the electrolyte cannot be replenished after the liquid injection hole is welded and sealed. Utility Model Content

[0006] The purpose of this utility model is to solve the shortcomings of the prior art. In order to achieve the above purpose, this utility model adopts the following technical solutions:

[0007] A liquid injection hole sealing structure includes: a top cover, a convex groove is provided on the upper surface of the top cover; a penetrating liquid injection hole is provided at the bottom of the convex groove; a cover plate is slidably engaged in the convex groove, and a penetrating countersunk hole is provided on the surface of the cover plate; a spring is arranged in the convex groove, one end of the spring abuts against the side wall of the convex groove, and the other end of the spring abuts against the side wall of the cover plate, and when the spring is not compressed by external force, the liquid injection hole and the countersunk hole are misaligned; a screw is assembled in the countersunk hole.

[0008] Further preferably, the cover plate is a convex structure, which consists of an upper adjusting block and a lower adjusting block, and sealing gaskets are provided on the upper and lower surfaces of the lower adjusting block.

[0009] Further preferably, the convex groove consists of an upper groove and a lower groove, the width dimensions of the upper groove and the lower groove are consistent, and the length dimension of the lower groove is greater than the length dimension of the upper groove.

[0010] Further preferably, the length of the upper groove is greater than the length of the upper adjusting block, and the width of the upper groove is consistent with that of the upper adjusting block.

[0011] Further preferably, the length dimension of the lower groove is greater than the length dimension of the lower adjusting block, the lower groove is consistent with the width dimension of the lower adjusting block, and the length dimension of the lower adjusting block is greater than the length dimension of the upper groove.

[0012] Further preferably, an internal thread is provided in the countersunk hole.

[0013] Further preferably, the top surface of the top cover and the top surface of the cover plate are on the same horizontal plane.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention manually pushes the cover plate to move to the left, the spring is compressed, and the liquid injection hole is connected with the countersunk hole. The liquid injection hole and the countersunk hole are connected or misaligned by the action of the spring, thereby realizing arbitrary switching of the liquid replenishment or sealing state. The sealing gaskets on the upper and lower surfaces of the cover plate seal the convex groove, and the spring is in a state without external force compression, the liquid injection hole and the countersunk hole are misaligned; at this time, the sealing gasket on the lower surface of the cover plate seals the liquid injection hole, and the countersunk hole on the cover plate is sealed by a screw. The present invention adopts multi-pass sealing and has good sealing performance. The liquid injection hole and the countersunk hole are manually connected by removing the screws. It is easy to operate and can prevent battery leakage while replenishing the battery for the second time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional view when the injection hole and the countersunk hole are misaligned;

[0016] Figure 2 It is a partial cross-sectional view of the top cover of the utility model;

[0017] Figure 3 This is a structural diagram of the cover plate in the utility model;

[0018] Figure 4 It is a partial cross-sectional view when the injection hole is connected to the countersunk hole;

[0019] Figure 5 It is a structural diagram of the present utility model.

[0020] In the figure: top cover 1, spring 2, cover plate 3, screw 4, upper groove 11, lower groove 12, injection hole 13, side block 14, upper adjustment block 31, lower adjustment block 32, sealing gasket 33, countersunk hole 34. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-Figure 5, a liquid injection hole sealing structure, comprising: a top cover 1, a convex groove is provided on the upper surface of the top cover 1; a penetrating liquid injection hole 13 is provided at the bottom of the convex groove; a cover plate 3 is slidably engaged in the received convex groove, and a penetrating countersunk hole 34 is provided on the surface of the cover plate 3; a spring 2 is arranged in the convex groove, one end of the spring 2 abuts against the side wall of the convex groove, and the other end of the spring 2 abuts against the side wall of the cover plate 3, and when the spring 2 is not compressed by external force, the liquid injection hole 13 and the countersunk hole 34 are misaligned; a screw 4 is assembled in the countersunk hole 34.

[0023] In the embodiment: the cover plate 3 is snap-fitted and assembled in the convex groove. The cover plate 3 can move left and right in the convex groove. A spring 2 is installed on the left side of the convex groove. Through the natural elastic force of the spring 2, the cover plate 3 is pressed to the right. At this time, the injection hole 13 on the top cover 1 and the countersunk hole 34 on the cover plate 3 are misaligned, and the misaligned injection hole 13 and the countersunk hole 34 achieve a sealing effect.

[0024] When electrolyte needs to be injected into the battery, first remove the screw 4, manually push the cover 3 to the left, the spring 2 is compressed, and the cover 3 moves to the left to connect the injection hole 13 with the countersunk hole 34. At this time, the electrolyte is directly injected into the battery through the connected countersunk hole 34 and the injection hole 13.

[0025] The cover plate 3 is a convex structure, which is composed of an upper adjustment block 31 and a lower adjustment block 32 . The upper and lower surfaces of the lower adjustment block 32 are both provided with sealing gaskets 33 .

[0026] In the embodiment, the sealing gaskets 33 on the upper and lower surfaces of the lower adjusting block 32 abut against the upper and lower surfaces of the lower groove 12 , so that the cooperation between the lower adjusting block 32 and the lower groove 12 realizes a sealing effect.

[0027] The convex groove consists of an upper groove 11 and a lower groove 12 . The widths of the upper groove 11 and the lower groove 12 are consistent, and the length of the lower groove 12 is greater than that of the upper groove 11 .

[0028] In the embodiment, the lower adjusting block 32 is installed in the lower groove 12 and can move left and right in the lower groove 12 , and the upper adjusting block 31 is installed in the upper groove 11 and can move left and right in the upper groove 11 .

[0029] In the embodiment: side blocks 14 are provided on both sides of the upper groove 11. In order to facilitate the installation of the cover plate 3, at least one side block 14 is fixedly connected to the top cover 1 by welding or bolts. The spring 2 is first installed in the convex groove, and then the cover plate 3 is installed in the convex groove. Then, the side block 14 is fixed to the top cover 1 by welding or bolts, and the cover plate 3 is clamped in the convex groove.

[0030] In one embodiment, the side block 14 on the right side is fixedly connected to the top cover 1 by welding or bolts, and the side block 14 on the left side is integrally formed with the top cover 1 .

[0031] In another embodiment, the side blocks 14 on the left and right sides are fixedly connected to the top cover 1 by welding or bolts.

[0032] The length of the upper groove 11 is greater than the length of the upper adjusting block 31 , and the width of the upper groove 11 is consistent with that of the upper adjusting block 31 .

[0033] In the embodiment, the upper adjusting block 31 is in the upper groove 11 and can move left and right along the length direction.

[0034] The length of the lower groove 12 is greater than that of the lower adjusting block 32 . The width of the lower groove 12 is consistent with that of the lower adjusting block 32 . The length of the lower adjusting block 32 is greater than that of the upper groove 11 .

[0035] In the embodiment, the lower adjusting block 32 is in the lower groove 12 and can move left and right along the length direction. The length of the lower adjusting block 32 is larger than the length of the upper groove 11 , so that the lower adjusting block 32 is snapped into the lower groove 12 .

[0036] The countersunk hole 34 is provided with an internal thread.

[0037] In the embodiment, the screw 4 cooperates with the countersunk hole 34 through the thread to achieve a sealing effect on the countersunk hole 34.

[0038] The top surface of the top cover 1 and the top surface of the cover plate 3 are on the same horizontal plane.

[0039] The utility model manually pushes the cover plate 3 to move to the left, and the spring 2 is compressed, so that the injection hole 13 is connected with the countersunk hole 34. The injection hole 13 and the countersunk hole 34 are connected or misaligned by the action of the spring 2, thereby realizing the arbitrary switching of the liquid replenishment or sealing state. The sealing gaskets 33 on the upper and lower surfaces of the cover plate 3 seal the convex groove. When the spring 2 is not compressed by external force, the injection hole 13 and the countersunk hole 34 are misaligned; at this time, the sealing gasket 33 on the lower surface of the cover plate 3 seals the injection hole 13, and the countersunk hole 34 on the cover plate 3 is sealed by the screw 4. The utility model adopts multiple sealings with good sealing performance. By removing the screw 4, the injection hole 13 and the countersunk hole 34 are manually connected. It is easy to operate and can prevent battery leakage while replenishing the battery for the second time.

Claims

1. A liquid injection hole sealing structure, characterized in that: include: A top cover, wherein a convex groove is provided on the upper surface of the top cover; a liquid injection hole is provided through the bottom of the convex groove; The cover plate is slidably engaged in the received convex groove, and a through countersunk hole is opened on the surface of the cover plate; a spring disposed in the convex groove, one end of the spring abutting against a side wall of the convex groove, and the other end of the spring abutting against a side wall of the cover plate, wherein when the spring is not compressed by an external force, the injection hole and the countersunk hole are misaligned; Screw, assembled in the countersunk hole.

2. The sealing structure of the liquid injection hole according to claim 1, characterized in that: The cover plate is a convex structure, which consists of an upper adjustment block and a lower adjustment block, and the upper and lower surfaces of the lower adjustment block are both provided with sealing gaskets.

3. The sealing structure of the liquid injection hole according to claim 2, characterized in that: The convex groove consists of an upper groove and a lower groove. The widths of the upper groove and the lower groove are consistent, and the length of the lower groove is greater than that of the upper groove.

4. The sealing structure of the liquid injection hole according to claim 3, characterized in that: The length of the upper groove is greater than the length of the upper adjusting block, and the width of the upper groove is consistent with that of the upper adjusting block.

5. The sealing structure of the liquid injection hole according to claim 3, characterized in that: The length of the lower groove is greater than the length of the lower adjusting block. The lower groove is consistent with the width of the lower adjusting block. The length of the lower adjusting block is greater than the length of the upper groove.

6. The sealing structure of the liquid injection hole according to claim 1, characterized in that: An internal thread is provided in the countersunk hole.

7. The sealing structure of the liquid injection hole according to claim 1, characterized in that: The top surface of the top cover and the top surface of the cover plate are in the same horizontal plane.

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