Sealing gasket of lithium battery electrolyte packaging barrel cover

Abstract

The utility model provides a lithium battery electrolyte packaging barrel cover sealing gasket which comprises a gasket body, a through hole is formed in the middle of the gasket body, a sealing cover groove is formed in the bottom of the gasket body, a sealing ring is arranged on the outer side of the gasket body, a first fixing piece is arranged on the top of the sealing ring, and a second fixing piece is arranged in the middle of the sealing ring. A first one-way valve used for exhausting air outwards is arranged at the top of the first fixing piece, a through hole is formed in the middle of the second fixing piece, a movable piece is arranged in the through hole, penetrates through the second fixing piece and is in sliding connection with the second fixing piece, and the movable piece comprises movable gaskets located on the upper side and the lower side of the second fixing piece respectively. The movable gasket is slidably connected with the sealing ring, an annular folding section is further arranged on the periphery of the movable gasket located below the second fixing piece, and the other end of the annular folding section is fixedly connected with the bottom of the second fixing piece. And the leakage risk of the electrolyte exists.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing barrel cover sealing technical field, concretely is lithium battery electrolyte packing barrel cover sealing gasket. BACKGROUND

[0002] Lithium battery electrolyte is the carrier of ion transmission in the battery, generally is composed of lithium salt and organic solvent. The electrolyte plays the role of conducting ions between the positive and negative electrodes of the lithium battery, and is the guarantee for the lithium ion battery to obtain high voltage, high specific energy and other advantages. The lithium battery electrolyte packing barrel cover sealing gasket is a device that assists in sealing the lithium battery electrolyte packing barrel.

[0003] The utility model with patent number CN212448804U discloses a lithium battery electrolyte packing barrel cover sealing gasket. The device provides expansion space for the lithium battery electrolyte by setting multiple expansion grooves. When the lithium battery electrolyte in the barrel expands or shrinks due to temperature differences, the lithium battery electrolyte is less likely to overflow from the sealing gasket, thereby reducing the probability of lithium battery electrolyte leakage and solving the safety hazard of lithium battery electrolyte leakage. However, the above-mentioned scheme only provides a certain pressure buffering capacity through the expansion grooves. Due to the nature of the electrolyte, the packing barrel used to store the electrolyte needs to be filled with inert gas at a certain pressure for protection. During storage and transportation, the electrolyte in the packing barrel may release gas, further increasing the internal pressure of the packing barrel. When the internal pressure of the packing barrel is too high, the sealing gasket may not be able to fully cope with sudden pressure fluctuations, resulting in a risk of leakage. Therefore, the lithium battery electrolyte packing barrel cover sealing gasket is proposed to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a lithium battery electrolyte packing barrel cover sealing gasket, which has the advantage of adjustable packing barrel internal pressure, solving the technical problem of electrolyte leakage when the internal pressure of the packing barrel is too high.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a lithium battery electrolyte packing barrel cover sealing gasket, including the gasket main part, the gasket main part middle part is provided with the through -hole, and the bottom is provided with the cover groove, the gasket main part outside is provided with the sealing ring, the sealing ring top is provided with the fixed piece no.

[0007] Further, the fixed piece no. 1 is further provided with a one-way valve no. 2 for controlling the inward flow of air.

[0008] Further, the sealing ring is provided with two semi-annular housings, the housings are provided with annular protrusions, and corresponding annular grooves are provided on the sealing ring, and the connecting plates at both ends of the semi-annular housings extend outward, respectively, one of the connecting plates of the housings is provided with a clamping block, and the other connecting plate is provided with a clamping groove.

[0009] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects: the lithium battery electrolyte packing barrel cover sealing gasket is provided with a movable movable gasket, and an annular folding section is fixedly arranged on the movable gasket, so that when the pressure in the barrel is too high, the movable gasket moves upward to compress the annular folding section, and the gas in the sealing gasket is discharged through the one-way valve; when the pressure in the barrel decreases, the movable gasket moves downward to stretch the annular folding section, and the air one-way valve flows into the sealing gasket, under the double action of the annular folding section and the one-way valve, the problem of electrolyte leakage risk when the internal pressure of the packing barrel is too high is solved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a sectional view of the utility model;

[0012] Figure 3 It is Figure 2 the enlarged view of A;

[0013] Figure 4 It is a partial exploded schematic view of the utility model.

[0014] In the figure: 1 - gasket main body; 2 - sealing ring; 3 - movable gasket; 4 - folding section; 5 - fixed piece no. 1; 6 - fixed piece no. 2; 7 - one-way valve no. 1; 8 - one-way valve no. 2; 9 - housing; 10 - protrusion; 11 - clamping block. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model.

[0016] Please refer to Figures 1-2 The lithium battery electrolyte packaging barrel cover sealing gasket in the embodiment comprises a gasket main body 1, a through hole is arranged in the middle of the gasket main body 1, a cover sealing groove is arranged at the bottom, a sealing ring 2 is arranged at the outer side of the gasket main body 1, a fixed sheet one 5 is arranged at the top of the sealing ring 2, a fixed sheet two 6 is arranged in the middle, a one-way valve one 7 is arranged at the top of the fixed sheet one 5, a through hole is arranged in the middle of the fixed sheet two 6, a movable piece is arranged in the through hole, the movable piece penetrates through the fixed sheet two 6 and is slidably connected with the fixed sheet two 6, the movable piece comprises movable gaskets 3 arranged on the upper and lower sides of the fixed sheet two 6 respectively, the movable gaskets 3 are slidably connected with the sealing ring 2, and an annular folding section 4 is further arranged at the outer periphery of the movable gasket 3 below the fixed sheet two 6, and the other end of the annular folding section 4 is fixedly connected with the bottom of the fixed sheet two 6.

[0017] In the application, the gasket main body 1, the sealing ring 2, the fixed sheet, the movable piece and the annular folding section 4 are all made of ethylene propylene diene rubber.

[0018] The sealing gasket is located at the inner side of the barrel cover, forms a sealing structure by being in contact with the barrel opening through the cover sealing groove, and is fixed between the sealing gasket and the barrel cover through a fastener or other connecting mechanism, which is the prior art.

[0019] The sealing gasket divides the space between the fixed sheet one 5 and the gasket main body 1 into two movable areas through the fixed sheet two 6, and adjusts the pressure in the barrel by sliding the movable piece up and down.

[0020] When the pressure in the barrel is too large, the air pressure in the barrel pushes the movable gasket 3 to move upwards, so that the space in the barrel below the fixed sheet two 6 is increased, the air above the fixed sheet two 6 is discharged out of the barrel through the one-way valve one 7, and at the same time, the annular folding section 4 is compressed by the upward movement of the movable gasket 3. The problem of the increase of the pressure in the barrel caused by the temperature rise in the electrolyte packaging barrel or the release of gas by the electrolyte itself in the packaging barrel can be solved, and the risk of electrolyte leakage can be avoided.

[0021] When the pressure in the barrel decreases, the movable gasket 3 moves downwards, and especially the expansion of the compressed annular folding section 4 can reduce the space in the barrel. The problem of the decrease of the pressure in the barrel caused by the thermal expansion and contraction phenomenon when the temperature in the electrolyte packaging barrel decreases can be solved, so that the air and the electrolyte in the barrel shrink, and the pressure in the barrel decreases.

[0022] Further, the one-way valve two 8 for controlling the inward flow of air is further arranged on the fixed sheet one 5.

[0023] As Figures 2-3As shown in the application, the device is provided with the one-way valve 8, so that when the pressure in the barrel decreases, the air flows inward to balance the air pressure in the sealing gasket.

[0024] Further, the outer periphery of the sealing ring 2 is provided with two half-ring housings 9, the housing 9 is provided with a ring-shaped protrusion 10, and a corresponding ring-shaped groove is provided on the sealing ring 2, and the connecting plates at both ends of the half-ring housing 9 extend outward, respectively, one of the connecting plates of the housing 9 is provided with a clamping block 11, and the connecting plate of the other housing 9 is provided with a clamping groove.

[0025] As shown in the application, the device is provided with the one-way valve 8, so that when the pressure in the barrel decreases, the air flows inward to balance the air pressure in the sealing gasket. Figure 4 As shown in the application, the device is provided with the one-way valve 8, so that when the pressure in the barrel decreases, the air flows inward to balance the air pressure in the sealing gasket.

[0026] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing gasket for a lithium battery electrolyte packaging barrel cover, comprising a gasket main body (1), characterized in that: The gasket body (1) is provided with a through hole in the middle and a cover groove in the bottom, and the outer side of the gasket body (1) is provided with a sealing ring (2), the top of the sealing ring (2) is provided with a fixed sheet one (5), the middle is provided with a fixed sheet two (6), the top of the fixed sheet one (5) is provided with a one-way valve one (7) for outward air exhaust, the middle of the fixed sheet two (6) is provided with a through hole, and a movable piece is arranged in the through hole, the movable piece penetrates through the fixed sheet two (6) and is in sliding connection with the fixed sheet two (6), the movable piece comprises movable gaskets (3) arranged on the upper and lower sides of the fixed sheet two (6) respectively, the movable gaskets (3) are in sliding connection with the sealing ring (2), and the outer periphery of the movable gasket (3) below the fixed sheet two (6) is further provided with an annular folding section (4), and the other end of the annular folding section (4) is fixedly connected with the bottom of the fixed sheet two (6).

2. The lithium battery electrolyte packaging bucket cover gasket according to claim 1, characterized in that: The fixed sheet one (5) is further provided with a one-way valve two (8) for controlling the inward flow of air.

3. The lithium battery electrolyte packaging bucket cover gasket according to claim 1, characterized in that: The outer periphery of the sealing ring (2) is provided with two half-ring housings (9), the half-ring housings (9) are provided with annular protrusions (10) and corresponding annular grooves on the sealing ring (2), and the connecting plates at the two ends of the half-ring housings (9) respectively extend outward, one of the connecting plates of the half-ring housings (9) is provided with a clamping block (11), and the other connecting plate of the half-ring housings (9) is provided with a clamping groove.

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