CN217483791U

CN217483791U - Lithium battery shell gas tightness testing arrangement

Info

Publication number: CN217483791U
Application number: CN202220736131.6U
Authority: CN
Inventors: 张樽民; 张小锋; 张青琴
Original assignee: Fuzhou Shidai Rongyuan Technology Co ltd
Current assignee: Fuzhou Shidai Rongyuan Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-23
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a lithium battery shell air tightness testing device in the lithium battery detection field, its structure includes fixed sealing plate, the new trend module, a housing, detection module, lithium battery shell, the electromagnetism fixer, the guide bar, the new trend module rigid coupling is in the casing top, detection module installs on the casing right side, the electromagnetism fixer is installed in the casing upper end, lithium battery shell installs on fixed sealing plate right side, guide bar installation fixed sealing plate right side lower extreme, the inside atmospheric pressure of lithium battery shell can be controlled in inflation valve and relief valve cooperation, adopt the positive pressure method can detect lithium battery shell fast, utilize the poor cooperation detection module of atmospheric pressure to accurately detect the gas tightness defect that lithium battery shell exists, make lithium battery shell gas tightness detection precision improve by a wide margin, reduce and detect the error rate, the efficiency of the test of lithium battery shell gas tightness is improved.

Description

Lithium battery shell gas tightness testing arrangement

Technical Field

The utility model relates to a lithium cell detection area specifically relates to a lithium cell casing gas tightness testing arrangement.

Background

The lithium battery is a battery which uses lithium metal or lithium alloy as a positive/negative electrode material and uses a non-aqueous electrolyte solution, and the lithium metal has very active chemical characteristics, so that the processing, storage and use of the lithium metal have very high requirements on the environment.

Aiming at the air tightness testing device of the current lithium battery shell, a relative scheme is made aiming at the following problems:

at present, lithium battery shell gas tightness testing device adopts the positive pressure method to carry out gas tightness test to lithium battery shell usually, and traditional detection mode needs the manual work to carry out the gas tightness to lithium battery shell and judges, and it is lower to detect the precision, produces detection error easily, causes final testing result inaccurate, influences lithium battery shell qualification rate, and it is comparatively loaded down with trivial details to detect the process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at overcomes prior art not enough, provides a lithium cell casing gas tightness testing arrangement.

The utility model discloses a following technical scheme realizes: a lithium battery shell air tightness testing device structurally comprises a sealing fixing plate, a fresh air module, a shell, a detection module, a lithium battery shell, an electromagnetic fixer and a guide rod, wherein the fresh air module is fixedly connected above the shell, the detection module is installed on the right side of the shell, the electromagnetic fixer is installed at the upper end of the shell, the lithium battery shell is installed on the right side of the sealing fixing plate, the guide rod is installed at the lower end of the right side of the sealing fixing plate, the sealing fixing plate comprises a fixing plate, a magnetic suction block, a sealing ring, a transmission motor, a transmission rod, a clamping block, an inflation inlet, an inflation valve and a pressure release valve, the magnetic suction block is fixedly connected in a groove formed in the right side of the fixing plate, the sealing ring is installed on the right side of the fixing plate, the transmission motor is fixedly connected in a step formed in the right side of the fixing plate, the transmission rod is installed on an output shaft at the lower end of the transmission motor, the clamping block is installed above the transmission rod, the inflation inlet is fixedly connected in a through hole formed in the middle of the fixing plate, the inflation valve is fixedly connected on the left side of the inflation inlet, the relief valve is fixedly connected below the inflation valve, and the inflation valve and the relief valve are matched to control the air pressure inside the lithium battery shell.

Further, the sealing washer is installed in magnetism and is inhaled piece below, the sealing washer is squarely installed in the fixed plate right side recess.

Furthermore, the left end of the lithium battery shell is connected with the liquid injection port in a clamping connection position arranged at the right end of the inflation port, and the inflation port is communicated with the inside of the lithium battery shell.

Furthermore, a cavity capable of accommodating the lithium battery shell is arranged in the shell.

Furthermore, the transmission motor, the transmission rod and the clamping block form a group of transmission mechanisms, and two groups of transmission mechanisms are arranged on the right side of the sealing fixing plate.

Furthermore, a control panel is arranged on the outer surface of the left side of the fixing plate and electrically connected with the transmission motor.

Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses be equipped with the lithium battery case that fixed sealing plate can adapt to different specifications, adopt the positive pressure method can carry out detection achievement to lithium battery case fast, utilize the air pressure difference cooperation detection module can accurately detect out the gas tightness defect that lithium battery case exists, make lithium battery case gas tightness detection precision improve by a wide margin, reduce and detect the error rate to concentrate on the operation design of one side, make the detection procedure operation degree of difficulty reduce, improved the efficiency of software testing of lithium battery case gas tightness.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is the overall structure diagram of the present invention.

Fig. 2 is a schematic view of the internal structure of the sealing and fixing plate of the present invention.

In the figure: the device comprises a sealing fixing plate 1, a fresh air module 2, a shell 3, a detection module 4, a lithium battery shell 5, an electromagnetic fixer 6, a guide rod 7, a fixing plate 11, a magnetic suction block 12, a sealing ring 13, a transmission motor 14, a transmission rod 15, a clamping block 16, an inflation inlet 17, an inflation valve 18 and a pressure release valve 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-2, the utility model provides a lithium battery case airtightness testing device technical scheme: its structure includes seal fixing plate 1, new trend module 2, casing 3, detection module 4, lithium cell outer shell 5, electromagnetism fixer 6, guide bar 7, new trend module 2 rigid coupling in casing 3 top, new trend module 2 can blow the inside cavity of casing 3, blows off casing 3 with the inside remaining helium of casing 3, renews the inside air of casing 3, detection module 4 installs on casing 3 right side, detection module 4 tests the contact and extends to inside the casing 3, the test contact can be to the helium content in the air measure, electromagnetism fixer 6 is installed in casing 3 upper end, lithium cell outer shell 5 installs on seal fixing plate 1 right side, guide bar 7 installation seal fixing plate 1 right side lower extreme, seal fixing plate 1 can carry out parallel translation in casing 3 one side through guide bar 7, seal fixing plate 1 includes fixed plate 11, the fixed plate, Magnetic suction block 12, sealing ring 13, transmission motor 14, transmission rod 15, clamping block 16, inflation inlet 17, inflation valve 18, relief valve 19, magnetic suction block 12 rigid coupling is in including the recess that fixed plate 11 right side was established, magnetic suction block 12 that fixed plate 11 right side was equipped with can produce the cooperation with electromagnetism fixer 6, is fixed in fixed plate 11 at the casing 3 left end, magnetic suction block 12 can produce powerful magnetic attraction with electromagnetism fixer 6's cooperation in-process, hugs closely sealed fixed plate 1 at lithium cell housing 5 left end, sealing ring 13 is installed on fixed plate 11 right side, transmission motor 14 rigid coupling is in the step that fixed plate 11 right side was established, transmission rod 15 installs on transmission motor 14 lower extreme output shaft, clamping block 16 installs in transmission rod 15 top, clamping block 16 is the L form, clamping block 16 is the lead screw drive mechanism with transmission rod 15, the inflation inlet 17 is fixedly connected in a through hole arranged in the middle of the fixing plate 11, the inflation valve 18 is fixedly connected on the left side of the inflation inlet 17, the relief valve 19 is fixedly connected below the inflation valve 18, the right side of the inflation inlet 17 is provided with an inflation inlet and a relief outlet, both the inflation inlet and the relief outlet are in a normally closed state, both the inflation valve 18 and the relief valve 19 are connected with an external air source, the relief valve 19 can balance the internal air pressure of the lithium battery shell 5, when the internal air pressure of the lithium battery shell 5 needs to be relieved, the relief valve 19 can be opened to perform pressure relief operation, so that the internal air pressure of the lithium battery shell 5 is consistent with the external pressure, the inflation valve 18 and the relief valve 19 are matched to control the internal air pressure of the lithium battery shell 5, the sealing ring 13 is arranged below the magnetic suction block 12, the sealing ring 13 is arranged in a groove on the right side of the fixing plate 11 in a square shape, and the sealing surface of the sealing ring 13 plays a sealing role when clinging to the left end of the lithium battery shell 5, the joint is connected with the joint position that is equipped with at the right end of an inflation inlet (17) at the left end of the lithium battery shell 5, the joint position that is equipped with at the right end of the inflation inlet (17) can be matched with the liquid injection position at the left end of the lithium battery shell 5, and the effect of a sealing interface is achieved, the inflation inlet 17 can be communicated with the inside of the lithium battery shell 5, the lithium battery shell 5 can be fixed at the right side of the inflation inlet 17 through an air nozzle that is equipped at the right side of the inflation inlet 17, the inflation inlet 17 can charge high-pressure high-concentration helium gas into the inside of the lithium battery shell 5, the testing method is a positive pressure testing method, helium gas higher than atmospheric pressure needs to be charged into the inner cavity of the lithium battery shell 5, when the lithium battery shell 5 has an air tightness defect, the helium gas enters the surrounding atmosphere environment on the outer surface of the lithium battery shell 5 through the air tightness defect, and passes through the testing contact arranged on the detection module 4, the helium concentration value change in the shell 5 can be detected, whether the air tightness of the lithium battery shell 5 is complete or not is judged according to the change, if the helium concentration value change in the shell 5 is stable, the air tightness of the lithium battery shell 5 is complete, if the helium concentration value change in the shell 5 presents an ascending trend, the air tightness of the lithium battery shell 5 is judged to be incomplete, the lithium battery shell 5 has an air tightness defect, the inflation valve 18 arranged at the inflation port 17 is a pressurization valve, the relief valve 19 arranged at the inflation port 17 is a relief valve, a cavity capable of accommodating the lithium battery shell 5 is arranged in the shell 3, the lithium battery shell 5 is provided with a cavity which is in a closed state when the sealing fixing plate 1 is completely matched with the shell 3, the transmission motor 14 drives the transmission rod 15 to drive the clamping block 16 to move, and the transmission motor 14, the transmission rod 15 and the clamping block 16 are a group of transmission mechanisms, as shown in the accompanying drawing 2, 1 right side of seal fixing plate is equipped with two sets of drive mechanism, two sets of drive mechanism are the longitudinal symmetry formula and distribute, two sets of drive mechanism mutually support and can carry out clamping work to lithium battery case 5, two sets of drive mechanism can restrict lithium battery case 5 and carry out displacement from top to bottom to play the supporting role, 11 left side surfaces of fixed plate are equipped with control panel, control panel and 14 electricity of driving motor are connected together, control panel can control driving motor 14 and drive transfer line 15 and grip block 16 and carry out the centre gripping and loosen.

The utility model relates to a lithium battery case gas tightness testing arrangement's theory of operation:

when the air tightness testing device of the lithium battery shell is used, one side of a liquid injection port of the lithium battery shell is aligned to an inflation port arranged on the right side of a sealing fixed plate and clamped and installed together, as shown in figure 2, a control panel controls a transmission mechanism consisting of a transmission motor, a transmission rod and a clamping block which are symmetrically distributed on the upper side and the lower side of the right side of the sealing fixed plate to clamp the lithium battery shell and play a role of supporting, after the clamping work of the lithium battery shell is completed, a fresh air module is started to blow air inside the shell to make air inside the shell flow, so that the influence of air deposition on detection precision is avoided, then the fresh air module can be closed to push the sealing fixed plate to move along a guide rod from left to right to make a sealing surface of a sealing ring contact with a left end surface plane of the lithium battery shell, an electromagnetic fixer is started at the moment, and the electromagnetic fixer generates magnetic force to attract each other with a magnetic attraction block, the magnetic force generated by the electromagnetic fixer makes the magnetic attraction block drive the sealing fixing plate to cling to the left end face of the shell, at the moment, the sealing surface of the sealing ring is tightly pasted to the left end face of the lithium battery shell to form a sealing surface, the sealing fixing plate and the inner cavity of the lithium battery shell form a closed space, at the moment, helium with high pressure and high concentration is filled into the lithium battery shell at atmospheric pressure higher than a standard through an inflation valve arranged at an inflation port through an external air source, so that the interior of the lithium battery shell presents a high-pressure environment, at the moment, a test contact arranged on the detection module can detect the content change of helium in the cavity inside the shell, after the pressure of the lithium battery shell is maintained for a certain time, whether the helium concentration content detected by the detection module presents an ascending trend is observed, so as to judge whether the lithium battery shell has an air tightness defect, after the air tightness test work is finished, a relief valve arranged at the inflation port is opened, the inside high-pressure helium that is filled with of lithium cell casing releases, make the inside atmospheric pressure of lithium cell casing unanimous with external environment atmospheric pressure, close the electromagnetism fixer, the electromagnetism fixer can with inhale and lose magnetism between the piece, sealed fixed plate is opened from the right side to the left, control the grip block by control panel and loosen lithium cell casing, can take off lithium cell casing this moment, and start the new trend module and blow to the casing is inside, blow off inside the casing remaining helium, lithium cell casing gas tightness test work accomplishes so far.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a lithium battery case gas tightness testing arrangement, its structure includes sealed fixed plate (1), new trend module (2), casing (3), detection module (4), lithium battery case (5), electromagnetism fixer (6), guide bar (7), its characterized in that:

the fresh air module (2) is fixedly connected above the shell (3), the detection module (4) is arranged on the right side of the shell (3), the electromagnetic fixer (6) is arranged on the upper end of the shell (3), the lithium battery shell (5) is arranged on the right side of the sealing fixing plate (1), the guide rod (7) is arranged at the lower end of the right side of the sealing fixing plate (1), the sealing fixing plate (1) comprises a fixing plate (11), a magnetic suction block (12), a sealing ring (13), a transmission motor (14), a transmission rod (15), a clamping block (16), an inflation inlet (17), an inflation valve (18) and a pressure relief valve (19), the magnetic suction block (12) is fixedly connected in a groove arranged on the right side of the fixing plate (11), the sealing ring (13) is arranged on the right side of the fixing plate (11), the transmission motor (14) is fixedly connected in a step arranged on the right side of the fixing plate (11), the utility model discloses a lithium battery pack, including transmission motor (14), grip block (16), relief valve (19), transfer line (15) are installed on transmission motor (14) lower extreme output shaft, grip block (16) are installed in transfer line (15) top, inflation inlet (17) rigid coupling is in the through-hole that establishes in fixed plate (11) middle part, inflation valve (18) rigid coupling is in inflation inlet (17) left side, relief valve (19) rigid coupling is in inflation valve (18) below, inflation valve (18) and relief valve (19) cooperation can control the inside atmospheric pressure of lithium cell shell (5).

2. The lithium battery case airtightness testing apparatus according to claim 1, wherein: the sealing ring (13) is arranged below the magnetic suction block (12), and the sealing ring (13) is arranged in a groove on the right side of the fixing plate (11) in a square shape.

3. The lithium battery case airtightness testing apparatus according to claim 1, wherein: lithium cell shell (5) left end is annotated liquid mouthful joint and is equipped with in inflation inlet (17) right-hand member card kneck, inflation inlet (17) and the inside intercommunication of lithium cell shell (5).

4. The lithium battery case airtightness testing apparatus according to claim 1, wherein: the shell (3) is internally provided with a cavity capable of accommodating a lithium battery shell (5).

5. The lithium battery case airtightness testing apparatus according to claim 1, wherein: the transmission motor (14), the transmission rod (15) and the clamping block (16) form a group of transmission mechanisms, and two groups of transmission mechanisms are arranged on the right side of the sealing fixing plate (1).

6. The lithium battery case airtightness testing apparatus according to claim 1, wherein: the outer surface of the left side of the fixing plate (11) is provided with a control panel, and the control panel is electrically connected with a transmission motor (14).