CN219511757U - Equipment for testing tightness of lithium battery cell - Google Patents

Abstract

The utility model discloses equipment for testing tightness of a lithium battery cell, and relates to the technical field of tightness detection of lithium battery cells. Comprises a water tank container for filling water; a nitrogen bottle for filling gas and placed outside the water tank container; the three-way joint is used for transmitting gas, a pipeline group with a switch is arranged between one joint of the three-way joint and the gas outlet end of the nitrogen cylinder, and the buffer rubber table is used for bearing the three-way joint and is fixed at the bottom of the three-way joint, the bottom of the three-way joint is fixed in the water tank container, and the top of the three-way joint is provided with a detachable carrying frame. According to the utility model, the sealed battery cell is arranged in the threaded sleeve in the water tank container and is fixed, and the nitrogen cylinder is used for filling gas into the threaded sleeve, so that the actual tightness of the lithium battery cell is judged by observing the generation condition of bubbles in the water tank container, and the tightness of the lithium battery cell is detected in a relatively visual way.

Description

Equipment for testing tightness of lithium battery cell

Technical Field

The utility model relates to the technical field of lithium battery cell tightness detection, in particular to equipment for testing lithium battery cell tightness.

Background

Lithium batteries are widely applied to electric tools such as notebooks, cameras and the like, and the lithium batteries are usually operated in low-temperature and low-pressure environments, so that the sealing performance of the lithium batteries is particularly important.

Through the search, the Chinese patent application of the publication No. CN113790849B is entitled, and the application provides a technical problem that in the prior art, a sealing performance detection device for a lithium battery is complex in structure and high in cost, and a larger error is easy to occur in the detection of the air tightness and the water tightness of the lithium battery, so that the detection result has deviation, and the sealing performance of the lithium battery cannot be detected efficiently, and provides a sealing performance test device for the lithium battery for the problem.

However, the above device has the problems of complex operation and imperceptible tightness when actually operating, and the applicant proposes a novel device for this purpose.

Disclosure of Invention

The utility model aims to provide equipment for testing the tightness of a lithium battery cell, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an apparatus for testing the sealability of a lithium battery cell comprising:

a water tank container for filling water;

a nitrogen bottle for filling gas and placed outside the water tank container;

a three-way joint for transmitting gas, a pipeline group with a switch installed between one joint of the three-way joint and the gas outlet end of the nitrogen cylinder, and

the buffer rubber table is used for bearing the tee joint, is fixed at the bottom of the tee joint, is fixed in the water tank container at the bottom of the tee joint, is provided with a detachable carrying frame at the top of the tee joint, and does not interfere with the outside of the tee joint;

the top of the carrying frame is fixedly provided with a threaded sleeve for placing the sealed lithium battery cell, the top of the threaded sleeve is provided with a fixing part for limiting the sealed lithium battery cell, the top of the outer part of the threaded sleeve is in threaded connection with a fixing cap with a notch at the top, and the fixing cap compresses the fixing part on the top of the threaded sleeve;

and in the other two joints in the three-way joint, one joint is arranged at the bottom end of the inside of the threaded sleeve after penetrating through the bottom of the carrying frame, and the other joint is fixedly provided with a gas release valve pipe.

Still further, the fixing member includes:

the round formed by the two semicircular plates is matched with the fixing cap;

gaps are respectively arranged on the joint surfaces of the two semicircular plates, and the two gaps clamp the sealed lithium battery cell after the two semicircular plates are combined.

Furthermore, one end of the semicircular plate joint surface is provided with a limiting opening, and the other end of the semicircular plate joint surface is fixedly provided with a limiting pin matched with the limiting opening.

Still further, the pipe group includes:

a pressure valve tube, a connecting tube and an air injection tube,

the pressure valve tube, the connecting tube and the gas injection tube are sequentially communicated, one end of the pressure valve tube is fixed and communicated with the gas outlet end of the nitrogen cylinder, and one end of the gas injection tube is installed at the three-way joint.

Furthermore, the pressure valve tube is formed by combining a pipeline, a valve switch and a pressure gauge, and the cut-off end of the valve switch and the detection end of the pressure gauge are both positioned in the pipeline.

Further, the two ends of the outer part of the fixed cap are respectively fixed with a stressed grab handle;

the outer part of the stressed grab handle is sleeved with a rubber sleeve for increasing friction force.

Compared with the prior art, the utility model has the beneficial effects that:

according to the equipment for testing the tightness of the lithium battery cell, the sealed battery cell is placed in the threaded sleeve in the water tank container and is fixed, and the nitrogen bottle is used for filling gas into the threaded sleeve, so that the actual tightness of the lithium battery cell is judged by observing the generation condition of bubbles in the water tank container, and the tightness of the lithium battery cell is detected in a relatively visual mode.

Drawings

FIG. 1 is an isometric view of the present utility model;

FIG. 2 is a structural diagram of the present utility model;

FIG. 3 is a structural view of the fixing member of the present utility model;

fig. 4 is a diagram illustrating the operation of the present utility model.

In the figure: 1. fixing the cap; 2. a fixing member; 201. a semicircular plate; 202. a limit opening; 203. a notch; 204. a limiting pin; 3. a threaded sleeve; 4. a carrying frame; 5. a three-way joint; 6. a buffer glue table; 7. a release valve tube; 8. an air injection pipe; 9. a sink container; 10. a connecting pipe; 11. a nitrogen cylinder; 12. a pressure valve tube.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The lithium battery is widely applied to electric tools such as notebooks, cameras and the like, and is usually operated in low-temperature and low-pressure environments, so that the sealing performance of the lithium battery is particularly important, and the applicant provides equipment capable of quickly and intuitively detecting the electrical sealing performance of the lithium battery.

Referring to fig. 1 to 4, the apparatus includes:

a water tank container 9 for filling water;

a nitrogen bottle 11 for filling gas and placed outside the water tank container 9;

a three-way joint 5 for transmitting gas, a pipe group with a switch being installed between one joint of the three-way joint 5 and the gas outlet end of the nitrogen cylinder 11, and

the buffer rubber table 6 is used for bearing the three-way joint 5, is fixed at the bottom of the three-way joint 5 and inside the water tank container 9, and is provided with a detachable carrying frame 4 at the top, and the carrying frame 4 and the outside of the three-way joint 5 do not interfere with each other;

the top of the carrying frame 4 is fixedly provided with a threaded sleeve 3 for placing the sealed lithium battery cell, the top of the threaded sleeve is provided with a fixing part 2 for limiting the sealed lithium battery cell, the top of the outside of the threaded sleeve is in threaded connection with a fixing cap 1 with a notch 203 at the top, and the fixing cap 1 compresses the fixing part 2 on the top of the threaded sleeve 3;

among the other two joints in the three-way joint 5, one joint is placed at the bottom end inside the threaded sleeve 3 after penetrating the bottom of the carrying frame 4, and the other joint is fixedly provided with a gas release valve pipe 7.

It is emphasized that the sealed battery cell is placed in the threaded sleeve 3 in the water tank container 9 and is fixed, and then the nitrogen bottle 11 is used for filling gas into the threaded sleeve 3, so that the actual tightness of the lithium battery cell is judged by observing the generation condition of bubbles in the water tank container 9, and the tightness of the lithium battery cell is detected in a relatively visual mode.

Embodiment 1,

Referring to fig. 3, in the present utility model,

the fixing member 2 includes:

the two semicircular plates 201 are matched with the circular and fixed cap 1 formed by the two semicircular plates 201;

the two semicircular plates 201 are respectively provided with a notch 203 on the joint surface, the two notches 203 clamp the sealed lithium battery cell after the two semicircular plates 201 are combined, and the limit opening 202 is arranged at one end of the joint surface of the semicircular plates 201, and the limit pin 204 matched with the limit opening 202 is fixed at the other end of the joint surface of the semicircular plates 201.

Embodiment II,

As can be seen with reference to fig. 4, in the present application,

the pipe group includes:

a pressure valve tube 12, a connecting tube 10 and an air injection tube 8,

the pressure valve tube 12, the connecting tube 10 and the gas injection tube 8 are sequentially communicated, one end of the pressure valve tube 12 is fixed and communicated with the gas outlet end of the nitrogen bottle 11, and one end of the gas injection tube 8 is arranged at the three-way joint 5.

It should be noted that, in the present utility model,

the pressure valve tube 12 is composed of a pipeline, a valve switch and a pressure gauge, wherein a valve switch stopping end and a pressure gauge detecting end are both positioned in the pipeline.

Third embodiment,

Referring to fig. 1, in the present utility model,

the two ends of the outer part of the fixed cap 1 are respectively fixed with a stressed grab handle;

the outer part of the stressed grab handle is sleeved with a rubber sleeve for increasing friction force.

In addition, it should be noted that, because the electric core is a chemical reaction device, there is a complex chemical reaction mode in it, and a certain internal pressure will be generated in the use process of the electric core, so the sealing performance requirement is stricter, the sealing test needs to be performed under a certain pressure state, so that the sealing effect can be effectively evaluated;

meanwhile, because the outside of the battery cell is of a hard metal steel shell structure, the test is not easy, the battery cell steel shell needs to be punched before the test, and then the inside of the battery cell can be pressurized (the internal pressure in the use process of the battery cell is simulated) so as to ensure the effectiveness of sealing-!

The specific steps are as follows:

step one, sealing, fixing, adding water and pressurizing;

step two, a battery cell testing flow: sealing, punching and fixing the battery cell;

wherein the punching process is as follows: and the steel nails are adopted to punch the cell steel shell through a small hole, so that test air pressure can smoothly enter the cell from the small hole.

When the device is used, the canned nitrogen is utilized to pressurize the inside of the battery cell through a special pipeline, a certain pressure value is required to be reached, and a certain test time is kept; observing the air leakage phenomenon: observing the water surface of the sealing area, and confirming whether bubbles are extruded out of the sealing area so as to judge the sealing effect; repeated stool tests were performed by pressure release using the air release valve tube 7.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the utility model as defined by the appended embodiments and equivalents thereof.

Claims (6)

1. An apparatus for testing the sealability of a lithium battery cell, comprising:

a water tank container for filling water;

a nitrogen bottle for filling gas and placed outside the water tank container;

a three-way joint for transmitting gas, a pipeline group with a switch installed between one joint of the three-way joint and the gas outlet end of the nitrogen cylinder, and

the buffer rubber table is used for bearing the tee joint, is fixed at the bottom of the tee joint, is fixed in the water tank container at the bottom of the tee joint, is provided with a detachable carrying frame at the top of the tee joint, and does not interfere with the outside of the tee joint;

the top of the carrying frame is fixedly provided with a threaded sleeve for placing the sealed lithium battery cell, the top of the threaded sleeve is provided with a fixing part for limiting the sealed lithium battery cell, the top of the outer part of the threaded sleeve is in threaded connection with a fixing cap with a notch at the top, and the fixing cap compresses the fixing part on the top of the threaded sleeve;

and in the other two joints in the three-way joint, one joint is arranged at the bottom end of the inside of the threaded sleeve after penetrating through the bottom of the carrying frame, and the other joint is fixedly provided with a gas release valve pipe.

2. The apparatus for testing the sealability of a lithium battery cell according to claim 1, wherein:

the fixing member includes:

the round formed by the two semicircular plates is matched with the fixing cap;

gaps are respectively arranged on the joint surfaces of the two semicircular plates, and the two gaps clamp the sealed lithium battery cell after the two semicircular plates are combined.

3. The apparatus for testing the sealability of a lithium battery cell according to claim 2, wherein:

one end of the semicircular plate joint surface is provided with a limiting opening, and the other end of the semicircular plate joint surface is fixedly provided with a limiting pin matched with the limiting opening.

4. The apparatus for testing the sealability of a lithium battery cell according to claim 1, wherein:

the pipe set includes:

a pressure valve tube, a connecting tube and an air injection tube,

the pressure valve tube, the connecting tube and the gas injection tube are sequentially communicated, one end of the pressure valve tube is fixed and communicated with the gas outlet end of the nitrogen cylinder, and one end of the gas injection tube is installed at the three-way joint.

5. The apparatus for testing the sealability of a lithium battery cell as set forth in claim 4, wherein:

the pressure valve tube is formed by combining a pipeline, a valve switch and a pressure gauge, and the valve switch stopping end and the pressure gauge detecting end are both positioned in the pipeline.

6. The apparatus for testing the sealability of a lithium battery cell according to claim 1, wherein:

the two ends of the outer part of the fixed cap are respectively fixed with a stressed grab handle;

the outer part of the stressed grab handle is sleeved with a rubber sleeve for increasing friction force.