CN210571237U

CN210571237U - Battery gas tightness testing arrangement

Info

Publication number: CN210571237U
Application number: CN201921540043.3U
Authority: CN
Inventors: 曹干顺; 郭鑫; 李明钧; 孙学磊; 曹永博
Original assignee: Tianneng Shuai Fude Energy Co Ltd
Current assignee: Tianneng Shuai Fude Energy Co Ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-05-19
Anticipated expiration: 2029-09-16

Abstract

The utility model provides a battery gas tightness testing arrangement belongs to the lithium cell field. It has solved current if the battery size is different, still need disassemble the corresponding mould scheduling problem of changing gas tightness testing arrangement, a battery gas tightness testing arrangement, including the base, the base on be provided with fixing device, fixing device includes first fixed plate and second fixed plate, the distance between first fixed plate and the second fixed plate is adjustable, first fixed plate and second fixed plate between form the fixed chamber that is used for fixed battery, fixing device is provided with the gas pipeline, the gas pipeline is used for toward filling gas in the battery, is provided with pressure display device on the gas pipeline. The utility model discloses guarantee that the cylinder battery of different diameters size can all use the utility model discloses carry out the gas tightness test, advantage such as very convenience.

Description

Battery gas tightness testing arrangement

Technical Field

The utility model belongs to the lithium cell field, in particular to battery gas tightness testing arrangement.

Background

Lithium ion batteries are widely used due to their advantages of high energy density, long cycle life, and the like. Especially in the fields of large-scale application, such as electric bicycles, electric automobiles, energy storage power stations and the like. The current cylindrical lithium ion batteries have models of 18650, 21700, 26650, 32650 and the like, and are batteries with even larger diameters. The safety of the lithium ion battery is more and more emphasized due to the large application of the lithium ion battery, the air tightness of the battery is critical to the quality of the battery, and when the air tightness of the battery is poor, the battery can leak, so that the quality of the battery is seriously influenced. When the battery is short-circuited, the battery can generate heat to generate gas, if the generated gas cannot be discharged in time, the battery can explode to generate fire, and the life safety of a user is seriously threatened.

After the battery is produced, the battery is sampled and detected to detect the quality of the battery, wherein the air tightness test is one of quality detection, and the detection method comprises the following steps: the method comprises the steps of extracting a produced battery, punching a hole (called a battery hole, wherein the fixed diameter of the battery hole is 4mm) in the battery, filling nitrogen into the battery through the hole, connecting a pressure gauge to a pipeline filled with the nitrogen, wherein when the battery is filled with the nitrogen, the inside of the battery has breaking sound along with the rise of pressure, the pressure value of the pressure gauge at the moment is the actual breaking pressure, and if the pressure value is 1.0-1.2 MPa, the pressure is maintained at 1.4MPa for 2 minutes, so that the battery is airtight, and the quality is qualified.

The existing battery airtightness testing device is shown in fig. 6 (18650), the device is used for sleeving a battery with a cylindrical sealing ring, the battery is inserted into the sealing ring for inflation, the size of the sealing ring is fixed, the battery can only be installed with a specific size, if the sizes of the batteries are different, corresponding dies need to be disassembled and replaced, and the assembly and disassembly of the battery are time-consuming and labor-consuming.

Disclosure of Invention

The utility model aims at providing a battery gas tightness testing arrangement to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a battery gas tightness testing arrangement, its characterized in that, includes the base, the base on be provided with fixing device, fixing device include first fixed plate and second fixed plate, first fixed plate and second fixed plate between the distance adjustable, first fixed plate and second fixed plate between form the fixed chamber that is used for fixed battery, fixing device be provided with gas pipeline, gas pipeline be used for toward the interior gas-filled of battery, gas pipeline on be provided with pressure display device.

The utility model discloses a theory of operation: the battery is placed in a fixed cavity formed between a first fixed plate and a second fixed plate, the distance between the first fixed plate and the second fixed plate can be adjusted, so that the distance between the first fixed plate and the second fixed plate can be adjusted according to the size of the battery, the battery is fixed, after the battery is fixed, nitrogen is filled into the battery through an inflation pipeline, a pressure display device is used for displaying the pressure in the battery, when the battery is inflated, the internal part of the battery has break sound along with the rise of the pressure, the pressure value displayed by the pressure display device at the moment is the actual break pressure, if the pressure value is 1.0-1.2 MPa, then the pressure is maintained at 1.4MPa for 2 minutes, the air leakage of the battery is indicated, and the quality is qualified. The utility model discloses distance between first fixed plate and the second fixed plate can be adjusted, and the cylinder battery of guaranteeing different diameters size can all use the utility model discloses carry out the gas tightness test, it is very convenient.

In the above device for testing air tightness of battery, one side of the first fixing plate and the second fixing plate close to the battery is an arc surface.

In the above device for testing air tightness of battery, the first fixing plate is fixedly connected with the base.

In the above device for testing air tightness of battery, the first fixing plate is provided with an inflation hole needle, the inflation hole needle is connected with an inflation pipeline, and the inflation hole needle is used for being inserted into a battery hole of the battery.

In the above-mentioned battery gas tightness testing device, first fixed plate and second fixed plate all be provided with the flexible layer, the flexible layer adopt rubber to make, the flexible layer be used for pressing from both sides tight battery, the flexible layer be located the one side of being close to the battery.

In the above-mentioned battery gas tightness testing device, the base on be provided with the slide rail, second fixed plate bottom both sides be provided with the slider, the slider be used for sliding in the slide rail.

In the above battery airtightness testing apparatus, the second fixing plate is provided with a locking device, and the locking device is used for locking the position of the sliding block in the sliding rail.

In the above-mentioned battery airtightness testing apparatus, the locking device includes a gear and racks engaged with upper and lower sides of the gear, when the gear rotates, the racks move in opposite directions, and the gear and the racks are located in the second fixing plate.

In foretell battery gas tightness testing arrangement, the gear be provided with the rotatory rotary push rod of drive gear, rotary push rod is used for supplying the staff to rotate with the hand and promote, rotary push rod be used for promoting the second fixed plate and remove, the gear be provided with the pivot that links firmly with the second fixed plate, the gear can revolute the rotation of axes, the pivot cover be equipped with the torsional spring, one of them torque arm and the gear of torsional spring link firmly, another torque arm and the pivot of torsional spring link firmly.

In the battery airtightness testing device, the sliding block is provided with the locking block, the locking block is connected with the rack through the connecting rod, and when the rotating push rod drives the gear to rotate, the locking block extends into the sliding block to unlock the sliding block and the locking block; when the rotary push rod does not drive the gear to rotate, one end of the locking block abuts against the side wall of the sliding rail, so that the sliding block and the locking block are locked.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses distance between first fixed plate and the second fixed plate can be adjusted, and the cylinder battery of different diameters size can all be used to the assurance the utility model discloses carry out the gas tightness test.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram of the slider of the present invention;

fig. 3 is a schematic structural view of the flexible layer of the present invention;

fig. 4 is a schematic structural view of the locking device of the present invention;

FIG. 5 is a schematic structural view of the rotating shaft and the torsion spring of the present invention;

fig. 6 is a schematic structural view of a conventional airtightness measuring apparatus.

In the figure, 1, a base; 2. a fixing device; 3. a first fixing plate; 4. a second fixing plate; 5. a fixed cavity; 6. an inflation conduit; 7. a pressure display device; 8. an inflation hole needle; 9. a flexible layer; 10. a slide rail; 11. a slider; 12. a locking device; 13. a gear; 14. a rack; 15. rotating the push rod; 16. a rotating shaft; 17. a torsion spring; 18. a locking block; 19. a connecting rod.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-5, a device for testing air tightness of a battery comprises a base 1, a fixing device 2 is arranged on the base 1, the fixing device 2 comprises a first fixing plate 3 and a second fixing plate 4, the distance between the first fixing plate 3 and the second fixing plate 4 is adjustable, a fixing cavity 5 for fixing the battery is formed between the first fixing plate 3 and the second fixing plate 4, an air charging pipe 6 is arranged on the fixing device 2, the air charging pipe 6 is used for charging the battery, and a pressure display device 7 is arranged on the air charging pipe 6. The pressure display means 7 may be a pressure gauge.

In more detail, the side surfaces of the first fixing plate 3 and the second fixing plate 4 close to the battery are cambered surfaces. The cambered surface is matched with the cylindrical battery, so that the battery is convenient to clamp.

In more detail, the first fixing plate 3 is fixedly connected with the base 1.

In more detail, the first fixing plate 3 is provided with an inflation hole needle 8, the inflation hole needle 8 is connected with the inflation pipeline 6, and the inflation hole needle 8 is used for being inserted into a battery hole of the battery. In traditional device, aerify and be at the sealing washer trompil, make the hole align battery hole (battery hole fixed diameter 4mm) aerify, long-time sealing washer is with can appearing not hard up, leads to gas leakage, makes the test inaccurate. And the utility model discloses set up and aerify hole needle 8, aerify hole needle 8 and insert the battery hole in, aerify hole needle 8 and inject the battery inside and aerify, guaranteed the accuracy of test.

In further detail, the first fixing plate 3 and the second fixing plate 4 are both provided with a flexible layer 9, the flexible layer 9 is made of rubber, the flexible layer 9 is used for clamping a battery, and the flexible layer 9 is located on one side close to the battery.

First fixed plate 3 and second fixed plate 4 are used for pressing from both sides tight battery, and after first fixed plate 3 and second fixed plate 4 pressed from both sides tight battery, flexible layer 9 and battery hug closely, conveniently press from both sides tight battery, make the battery warp when also preventing first fixed plate 3 and second fixed plate 4 from pressing from both sides tight battery, and aerify the hole needle 8 and insert the battery hole in, press from both sides tight back, flexible layer 9 hugs closely around the battery hole, can play sealed effect, prevent gas leakage.

In more detail, the base 1 is provided with a slide rail 10, two sides of the bottom of the second fixing plate 4 are provided with slide blocks 11, and the slide blocks 11 are used for sliding in the slide rail 10. The distance between the first fixing plate 3 and the second fixing plate 4 is adjusted by moving the second fixing plate 4, and the slider 11 is adapted to slide within the slide rail 10.

In further detail, the second fixing plate 4 is provided with a locking device 12, and the locking device 12 is used for locking the position of the slider 11 in the slide rail 10.

In more detail, the locking device 12 includes a gear 13 and a rack 14 engaged with the gear 13 at upper and lower sides thereof, when the gear 13 rotates, the rack 14 moves in opposite directions, and the gear 13 and the rack 14 are located in the second fixing plate 4. The gear 13 is provided with a rotary push rod 15 for driving the gear 13 to rotate, the rotary push rod 15 is used for enabling a worker to rotate and push by hands, the rotary push rod 15 is used for pushing the second fixing plate 4 to move, the gear 13 is provided with a rotating shaft 16 fixedly connected with the second fixing plate 4, the gear 13 can rotate around the rotating shaft 16, the rotating shaft 16 is sleeved with a torsion spring 17, one torsion arm of the torsion spring 17 is fixedly connected with the gear 13, and the other torsion arm of the torsion spring 17 is fixedly connected with the rotating shaft 16. The sliding block 11 is provided with a locking block 18, the locking block 18 is connected with the rack 14 through a connecting rod 19, and when the rotating push rod 15 drives the gear 13 to rotate, the locking block 18 extends into the sliding block 11, so that the sliding block 11 and the locking block 18 are unlocked; when the rotary push rod 15 does not drive the gear 13 to rotate, one end of the locking block 18 abuts against the side wall of the slide rail 10, so that the slide block 11 and the locking block 18 are locked.

The gear 13 and the rack 14 are located in the second fixing plate 4, when the rotary push rod 15 does not drive the gear 13 to rotate, i.e. the gear 13 is not moved, at this time, one end of the locking block 18 abuts against the side wall of the slide rail 10, and the slide block 11 and the locking block 18 are locked by the action of friction force. I.e., the position of the second fixing plate 4, is fixed so that the battery can be clamped between the first fixing plate 3 and the second fixing plate 4.

When the second fixing plate 4 needs to be moved, the worker can rotate the rotating push rod 15, the gear 13 rotates to drive the rack 14 to move in the opposite direction, the rack 14 is connected with the locking block 18 through the connecting rod 19, so that the locking block 18 is driven to stretch into the sliding block 11, the sliding block 11 and the locking block 18 are unlocked, the worker pushes the rotating push rod 15 again, and the second fixing plate 4 moves. After the position of the second fixing plate 4 is adjusted, a worker can loosen his hand or rotate the rotary push rod 15, if the worker looses his hand, the gear 13 automatically rotates under the resilience force of the torsion spring 17, the rack 14 moves in the opposite direction, one end of the locking block 18 extends out of the sliding block 11 again to abut against the side wall of the sliding rail 10, and the sliding block 11 and the locking block 18 are locked under the action of friction force. When the worker rotates the rotary push rod 15, the gear 13 rotates under the dual action of the rotation force and the resilience force of the torsion spring 17. The movement of the rack 14 may be through a slide in the second fixing plate 4 for movement of the rack 14.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms base 1, fixing device 2, first fixing plate 3, second fixing plate 4, fixing cavity 5, inflation duct 6, pressure display device 7, inflation hole needle 8, flexible layer 9, slide rail 10, slide block 11, locking device 12, gear 13, rack 14, rotary push rod 15, rotary shaft 16, torsion spring 17, lock block 18, connecting rod 19, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a battery gas tightness testing arrangement, a serial communication port, includes base (1), base (1) on be provided with fixing device (2), fixing device (2) including first fixed plate (3) and second fixed plate (4), first fixed plate (3) and second fixed plate (4) between the distance adjustable, first fixed plate (3) and second fixed plate (4) between form fixed chamber (5) that are used for fixed battery, fixing device (2) be provided with gas filled tube (6), gas filled tube (6) be used for toward the battery in aerifing, gas filled tube (6) on be provided with pressure display device (7).

2. The device for testing the airtightness of the battery according to claim 1, wherein one side surfaces of the first fixing plate (3) and the second fixing plate (4) adjacent to the battery are cambered surfaces.

3. The device for testing the airtightness of the battery according to claim 1, wherein the first fixing plate (3) is fixedly connected to the base (1).

4. The device for testing the airtightness of the battery according to claim 1, wherein the first fixing plate (3) is provided with an inflation hole needle (8), the inflation hole needle (8) is connected with the inflation pipe (6), and the inflation hole needle (8) is used for being inserted into a battery hole of the battery.

5. The device for testing the airtightness of the battery according to claim 1, wherein the first fixing plate (3) and the second fixing plate (4) are each provided with a flexible layer (9), the flexible layers (9) are made of rubber, the flexible layers (9) are used for clamping the battery, and the flexible layers (9) are located on the side close to the battery.

6. The battery airtightness testing apparatus according to claim 1, wherein the base (1) is provided with a slide rail (10), and two sides of the bottom of the second fixing plate (4) are provided with slide blocks (11), wherein the slide blocks (11) are used for sliding in the slide rail (10).

7. A device for testing the tightness of a battery according to claim 6, characterized in that the second fixing plate (4) is provided with locking means (12), the locking means (12) being adapted to lock the position of the slide (11) within the slide (10).

8. The device for testing the airtightness of the battery according to claim 7, wherein the locking means (12) comprises a gear (13) and racks (14) engaged with upper and lower sides of the gear (13), when the gear (13) rotates, the racks (14) move in opposite directions, and the gear (13) and the racks (14) are located in the second fixing plate (4).

9. The battery airtightness testing apparatus according to claim 8, wherein the gear (13) is provided with a rotating push rod (15) for driving the gear (13) to rotate, the rotating push rod (15) is used for the worker to rotate and push by hand, the rotating push rod (15) is used for pushing the second fixing plate (4) to move, the gear (13) is provided with a rotating shaft (16) fixedly connected with the second fixing plate (4), the gear (13) can rotate around the rotating shaft (16), the rotating shaft (16) is sleeved with a torsion spring (17), one torsion arm of the torsion spring (17) is fixedly connected with the gear (13), and the other torsion arm of the torsion spring (17) is fixedly connected with the rotating shaft (16).

10. The battery airtightness testing device according to claim 9, wherein the slide block (11) is provided with a lock block (18), the lock block (18) is connected with the rack (14) through a connecting rod (19), and when the rotary push rod drives the gear (13) to rotate, the lock block (18) extends into the slide block (11) to unlock the slide block (11) and the lock block (18); when the rotary push rod does not drive the gear (13) to rotate, one end of the locking block (18) props against the side wall of the sliding rail (10), so that the sliding block (11) and the locking block (18) are locked.