Cylindrical battery airtightness detection device

Abstract

The utility model relates to a cylindrical battery airtightness detection device comprising a main pipeline, the main pipeline is connected with an air pressure tank, the main pipeline is provided with a plurality of first branch pipelines, the top ends of the first branch pipelines are provided with right-angle connecting pipes, the right-angle connecting pipes are provided with vertically arranged sleeves, and the sleeves are connected with the air pressure tank. An upper gland is detachably installed at the top end of the sleeve, a lower gland is detachably installed at the bottom end of the sleeve, and sealing rings are installed between the upper gland and the sleeve and between the lower gland and the sleeve. The sealing ring is pressed by the upper and lower glands, so that the air tightness of the battery and the sleeve can be effectively ensured, the abrasion of the sealing ring caused by plugging and unplugging of the battery can be reduced, and the service life is prolonged; the operation is simple and fast, the test efficiency is improved, and air leakage points and air leakage pressure are convenient to observe; and the safety performance is high, and the safety relief valve is additionally arranged, so that overpressure or explosion during testing is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to cylindrical battery detection technical field especially relates to a cylindrical battery air tightness detection device. BACKGROUND

[0002] With the development of new energy industry, cylindrical lithium ion battery is very widely used, including automobile, energy storage, electric tool and other industries, and the safety of battery becomes the most important, and the air tightness of battery becomes an indispensable detection step, and unqualified air tightness of battery can cause electrolyte to spray, corrode electrical components and air in the internal cell, and moisture in the air causes performance damage to the battery.

[0003] The existing differential pressure detection device fills compressed air into the internal punched battery through the clamping device, closes the compressed air valve, observes the pressure gauge, and determines whether the air leaks according to the pressure relief, and the efficiency is low, the slight air leakage cannot be measured, and the accuracy of measurement is affected. UTILITY MODEL CONTENT

[0004] The utility model solves the problem of providing a cylindrical battery air tightness detection device, which solves the above technical problems.

[0005] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0006] A cylindrical battery air tightness detection device, comprising a main pipeline, the main pipeline is connected with the air pressure tank, a plurality of first branch pipelines are installed on the main pipeline, a right angle connecting pipe is installed at the top of the first branch pipeline, a sleeve vertically arranged is installed on the right angle connecting pipe, an upper gland is detachably installed at the top of the sleeve, a lower gland is detachably installed at the bottom of the sleeve, and a sealing ring is installed between the upper gland and the lower gland and the sleeve.

[0007] Preferably, a first on-off valve is installed on each first branch pipeline.

[0008] Preferably, a gas release valve is installed on the main pipeline through a second branch pipeline, and a second on-off valve is installed on the second branch pipeline.

[0009] Preferably, a safety pressure relief valve is installed on the main pipeline through a third branch pipeline.

[0010] Preferably, a pressure gauge is installed on the main pipeline through a fourth branch pipeline.

[0011] Preferably, the upper gland and the lower gland are connected with the sleeve through threads.

[0012] The utility model discloses a beneficial effect is: the mode of upper and lower gland compression seal ring can effectively guarantee the air tightness of battery and sleeve, and can reduce the wear and tear of battery plug -in to seal ring, improve the service life, simple, fast operation has improved the test efficiency, and simultaneously convenient for observing the air leakage point and air leakage air pressure, the safety performance is high, through the increase safety pressure -relief valve, effectively prevent overpressure or burst when testing. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is whole structure schematic diagram of the utility model;

[0014] Fig. 2 It is right angle connecting pipe mounting structure schematic diagram of the utility model;

[0015] Fig. 3 It is sleeve, upper gland and lower gland explosion structure schematic diagram of the utility model.

[0016] Legend:

[0017] 1, main pipeline;2, first branch pipeline;3, first on-off valve;4, right angle connecting pipe;5, sleeve;6, upper gland;7, lower gland;8, seal ring;9, second branch pipeline;10, second on-off valve;11, air release valve;12, third branch pipeline;13, safety pressure -relief valve;14, fourth branch pipeline;15, pressure gauge. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0019] The specific embodiments are given below.

[0020] Referring to Figs. 1-3 A cylindrical battery air tightness detection device, including main pipeline 1, main pipeline 1 is connected with air pressure tank, is installed with a plurality of first branch pipeline 2 on main pipeline 1, is installed with first on-off valve 3 on each first branch pipeline 2, realizes the intercommunication and closure of first branch pipeline 2 with main pipeline 1, is installed with right angle connecting pipe 4 on first branch pipeline 2 top, is installed with the sleeve 5 of vertical setting on right angle connecting pipe 4, is detachably installed with upper gland 6 on sleeve 5 top end, is detachably installed with lower gland 7 on sleeve 5 bottom end, and upper gland 6 and lower gland 7 are installed with seal ring 8 between sleeve 5, and upper gland 6 and lower gland 7 are connected with sleeve 5 through thread, to realize the convenient dismounting of upper gland 6, lower gland 7 and sleeve 5.

[0021] A vent valve 11 is installed on the main pipeline 1 via a second branch pipeline 9. A second on / off valve 10 is installed on the second branch pipeline 9 to achieve both connection and closure between the second branch pipeline 9 and the main pipeline 1. The vent valve 11 is used to release air after the test is completed.

[0022] A safety relief valve 13 is installed on the main pipeline 1 via the third branch pipeline 12, which facilitates automatic pressure relief in the event of overpressure.

[0023] A pressure gauge 15 is installed on the main pipeline 1 via the fourth branch pipeline 14 to monitor the internal pressure changes of the device.

[0024] The battery with a hole drilled in its casing is placed into the airtightness testing sleeve 5, and a sealing ring 8 is placed on the top and bottom. Then, the upper pressure cap 6 and the lower pressure cap 7 are tightened. The sealing ring 8 is pressed against the battery casing to form a sealed cavity. The sleeve 5 is connected to the main pipe 1 through the right-angle connecting pipe 4 and the first branch pipe 2. The air pressure is applied to the sleeve 5 through the pressure tank. The pressure is transmitted to the inside of the battery through the pores of the battery casing inside the sleeve 5. Water is dripped onto the battery cap, and the air leakage is observed while the pressure is continuously applied. The airtightness of the battery is determined by the pressure gauge 15.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cylindrical battery hermeticity detection device characterized by comprising: The utility model provides a kind of gas pressure tank, including main pipe (1), the main pipe (1) is connected with gas pressure tank, several first branch pipes (2) are installed on the main pipe (1), right-angle connecting pipe (4) is installed on the top end of the first branch pipe (2), sleeve (5) is installed on the right-angle connecting pipe (4) and is vertically arranged, upper gland (6) is detachably installed on the top end of the sleeve (5), lower gland (7) is detachably installed on the bottom end of the sleeve (5), and sealing ring (8) is installed between upper gland (6) and lower gland (7) and sleeve (5).

2. The cylinder cell airtightness detection device according to claim 1, characterized by, First on-off valve (3) is installed on each first branch pipe (2).

3. The cylinder cell airtightness detection device according to claim 2, characterized by, Gas release valve (11) is installed on the main pipe (1) by second branch pipe (9), and second on-off valve (10) is installed on the second branch pipe (9).

4. The cylindrical battery hermeticity detection device according to claim 3, wherein Safety pressure relief valve (13) is installed on the main pipe (1) by third branch pipe (12).

5. The cylinder cell airtightness detection device according to claim 4, characterized by, Pressure gauge (15) is installed on the main pipe (1) by fourth branch pipe (14).

6. The cylindrical battery hermeticity detection device according to claim 5, wherein Upper gland (6) and lower gland (7) are connected by thread with sleeve (5).

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