CN217560885U

CN217560885U - Square lithium cell weeping detection device

Info

Publication number: CN217560885U
Application number: CN202221313709.3U
Authority: CN
Inventors: 徐强; 矫贺东; 钟祥龙
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-10-11
Anticipated expiration: 2032-05-30

Abstract

The utility model provides a square lithium cell weeping detection device, include: the extrusion mechanism comprises an installation frame and a clamping device, and the clamping device is arranged at the top of the installation frame and is used for clamping and extruding the square lithium battery; detection mechanism, including collecting bucket, electrically conductive device and feedback device, collecting bucket is fixed to be set up on the mounting bracket under clamping device for collect the electrolyte that square lithium cell was revealed by the extrusion, and collecting bucket's top opening size is greater than bottom opening size, and collecting bucket's top opening just to clamping device, and electrically conductive device sets up collecting bucket's bottom, is used for carrying out the electric conductance after receiving electrolyte and leads to, and feedback device is connected with electrically conductive device for the feedback electrically conductive device condition of switching on. This device simple structure can detect square lithium cell weeping fast, and can avoid artifical hourglass to examine the phenomenon and take place.

Description

Square lithium cell weeping detection device

Technical Field

The utility model relates to a lithium battery detection technical field especially relates to a square lithium cell weeping detection device.

Background

With the rapid development of modern society, the appearance of new energy industry has very important meaning. The lithium ion battery has the advantages of high energy density, no memory effect, small environmental pollution and the like, and is widely applied to a plurality of fields at present. At present, the square aluminum shell lithium battery is lack of judgment basis of sealing quality after sealing, and the battery cell directly flows to the next procedure after appearance detection or helium detection qualification after sealing, so that an abnormal battery cell easily flows into a client.

At the present stage, square aluminum hull lithium cell seals the back, mainly relies on the manual work to detect its leakproofness, and whether main observation lithium cell has the crack, and then judges whether the lithium cell has the risk of revealing electrolyte. This kind of mode is only to the more obvious crack in lithium cell surface, when there is tiny crack on lithium cell surface, the manual work is difficult to in time discover, probably need detect through dedicated detecting instrument, because electrolyte fills in electric core, under quiescent condition, electrolyte can not reveal from tiny crack, nevertheless if these bad lithium cells flow to the customer end after, because the lithium cell when using, just can leak out from the tiny crack on battery surface slowly after the electrolyte takes place chemical reaction, lead to the lithium cell to break down. Therefore, the current problem of missed detection still exists through artifical mode detection square lithium cell whether weeping.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a square lithium cell weeping detection device solves artifical to square lithium cell weeping and detects time measuring, has the problem of lou examining.

The technical scheme of the utility model is realized like this:

the utility model provides a square lithium cell weeping detection device, include:

the extrusion mechanism comprises an installation frame and a clamping device, and the clamping device is arranged at the top of the installation frame and is used for clamping and extruding the square lithium battery;

detection mechanism, including collecting bucket, electrically conductive device and feedback device, collecting bucket is fixed to be set up on the mounting bracket under clamping device for collect the electrolyte that square lithium cell was revealed by the extrusion, and collecting bucket's top opening size is greater than bottom opening size, and collecting bucket's top opening just to clamping device, and electrically conductive device sets up collecting bucket's bottom, is used for carrying out the electric conductance after receiving electrolyte and leads to, and feedback device is connected with electrically conductive device for the feedback electrically conductive device condition of switching on.

On the basis of the technical scheme, preferably, the mounting bracket comprises a base, a first mounting plate and a second mounting plate, wherein the first mounting plate and the second mounting plate are vertically arranged on the base, the first mounting plate and the second mounting plate are parallel to each other and are arranged at intervals, and the clamping device is horizontally arranged between the first mounting plate and the second mounting plate.

Further, it is preferred, clamping device includes cylinder, first splint and second splint, the vertical setting of first splint is at first mounting panel inside wall, and the vertical setting of second splint is at second mounting panel inside wall, the stiff end and the first mounting panel lateral wall fixed connection of cylinder, and the flexible end of cylinder passes first mounting panel and first splint fixed connection.

On above-mentioned technical scheme's basis, it is preferred, still include rotary device, rotary device includes rotating electrical machines, reduction gear, first bearing and second bearing, reduction gear fixed mounting is at second splint lateral wall, and the second splint pass through the second bearing and rotate with the second mounting panel and be connected, the input shaft of reduction gear and rotating electrical machines's output shaft fixed connection, the output shaft of reduction gear pass second splint and second bearing and with second splint fixed connection, first bearing fixed mounting is in the one side that first splint are close to first mounting panel, the flexible end of cylinder passes first mounting panel and rotates with first bearing and be connected.

On above-mentioned technical scheme's basis, it is preferred, still include the buffering subassembly, the buffering subassembly includes fixed plate and two at least buffer, the vertical setting of fixed plate is between second splint and second mounting panel, and the fixed plate passes through the second bearing to be connected with the second mounting panel rotation, and two at least buffer levels set up between second splint and fixed plate, and two at least buffer are equidistant around the rotating electrical machines output shaft and arrange, and buffer includes barrel casing, slide bar, limiting plate and first spring, the barrel casing level is fixed to be set up at the fixed plate lateral wall, has the installation cavity in the barrel casing, and the barrel casing has the installing port that is linked together with the installation cavity towards the one end of second splint, and the bore of installing port is less than the installation cavity internal diameter, the one end and the horizontal fixed connection of second splint of slide bar, the other end pass the installing port stretch into the installation cavity and with limiting plate fixed connection, first spring setting is in the installation cavity, and its one end supports with the limiting plate and holds, and the other end supports with the fixed plate lateral wall and holds.

Further, it is preferred, the buffering subassembly still includes the arc elastic component, the arc elastic component is located in the middle of two at least buffer, two free ends of arc elastic component respectively with fixed plate lateral wall fixed connection, the arc bellying and the second splint lateral wall fixed connection of arc elastic component, horizontally connect has the second spring between arc elastic component middle part and the fixed plate.

And a clamping groove for mounting a battery is arranged on one surface of the first clamping plate opposite to the second clamping plate.

On the basis of the above technical scheme, preferably, the conductive device includes a positive conductive rod and a negative conductive rod, the positive conductive rod and the negative conductive rod are arranged at the bottom end of the liquid collecting hopper side by side, a gap is arranged between the positive conductive rod and the negative conductive rod, and the positive conductive rod and the negative conductive rod are respectively connected with the feedback device.

Further, preferably, the feedback device comprises a controller and a warning light, an input end of the controller is connected with the conducting device, and an output end of the controller is connected with the warning light.

Further, preferably, the detection mechanism further comprises a waste liquid box, and the waste liquid box is located below the liquid collecting hopper base.

The utility model discloses following beneficial effect has for prior art:

(1) The utility model discloses a square lithium cell weeping detection device, through setting up clamping device to square lithium cell centre gripping and exert certain extrusion force, when there is the crack on square lithium cell surface, the inside electric liquid of battery can pass through crack leakage department under the extrusion force effect, the electrolyte of revealing flows into in the collecting bucket downwards, after the electric installation touches the electrolyte in the collecting bucket, the electric installation switches on, and feed back through feedback device, and then judge whether the battery has the leakproofness bad, and have the weeping risk; the device is simple in structure, can quickly detect leakage of the square lithium battery, and can avoid the occurrence of manual leakage detection;

(2) By arranging the liquid collecting hopper, leaked electrolyte drops can quickly flow to the bottom end of the liquid collecting hopper after falling into the liquid collecting hopper, and whether the electrolyte leaks or not is quickly detected through the conducting device and the feedback device;

(3) By arranging the rotating device, on one hand, the problem that electrolyte leaked from the surface of the battery adheres to the surface of the battery and cannot enter the liquid collecting hopper to cause detection leakage when the lithium battery is in a static extrusion state can be avoided; on the other hand, the rotating device drives the square lithium battery to rotate, so that the battery is in a non-static state, the movement of the electrolyte in the battery is accelerated, and the leakage condition of the electrolyte under the working condition of the battery can be simulated, so that the leakage of the battery can be accurately and effectively detected;

(4) The buffering assembly is arranged, so that flexible floating clamping can be performed on the battery, gradual pressure application on the battery is realized, and the battery can be prevented from deforming in the extrusion process;

(5) Through design controller and warning light on feedback device, the input of controller is connected with electric installation, and the output of controller is connected with the warning light, can make anodal conducting rod and negative pole conducting rod switch on when contacting electrolyte, and the controller receives behind the level signal control warning light work, and then judges out the battery weeping.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a front view of a square lithium battery leakage detection device disclosed by the utility model;

fig. 2 is a top view of the leakage detecting device for a square lithium battery disclosed by the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is a schematic plan structure view of the detecting mechanism disclosed in the present invention;

the attached drawings are as follows:

1. an extrusion mechanism; 2. a detection mechanism; 10. a mounting frame; 11. a clamping device; 21. a liquid collecting hopper; 22. a conductive device; 23. a feedback device; 101. a first mounting plate; 102. a second mounting plate; 103. a base; 111. a cylinder; 112. a first splint; 113. a second splint; 12. a rotating device; 121. a rotating electric machine; 122. a speed reducer; 123. a first bearing; 124. a second bearing; 13. a buffer assembly; 130. a fixing plate; 131. a buffer device; 1311. a barrel sleeve; 1312. a slide bar; 1313. a limiting plate; 1314. a first spring; 132. an arc-shaped elastic member; 133. a second spring; 1110. a card slot; 221. a positive electrode conductive rod; 222. A negative electrode conductive rod; 231. a controller; 232. a warning light; 24. a waste liquid box.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to 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 work all belong to the protection scope of the present invention.

As shown in figure 1, with reference to figures 2-4, the embodiment of the present invention discloses a square lithium battery leakage detection device, which comprises an extrusion mechanism 1 and a detection mechanism 2.

Wherein, extrusion mechanism 1 is used for carrying out the extrusion operation to square lithium cell to can realize detecting the electrolyte that reveals among the lithium cell extrusion process through detection mechanism 2.

The extrusion mechanism 1 comprises an installation frame 10 and a clamping device 11, wherein the clamping device 11 is arranged at the top of the installation frame 10 and used for clamping and extruding the square lithium battery. Specifically, the mounting frame 10 includes a base 103, and a first mounting plate 101 and a second mounting plate 102 vertically disposed on the base 103, where the first mounting plate 101 and the second mounting plate 102 are parallel to each other and spaced apart from each other, and the clamping device 11 is horizontally disposed between the first mounting plate 101 and the second mounting plate 102, so that the first mounting plate 101 and the second mounting plate 102 are spaced apart from each other, and provide a space for mounting the lithium battery and an operation space for applying the pressing force to the clamping device 11 in the horizontal direction. Through giving the certain extrusion force of lithium cell, when there is certain crack or existence sealed clearance on lithium cell surface, the lithium cell is receiving the extrusion back, and the inside electrolyte of lithium cell can leak out through crack or sealed clearance, and then can judge that lithium cell leakproofness is bad.

For the convenience quick detection that the leakproofness is bad in the lithium cell, receive the extrusion back at the lithium cell, electrolyte can be revealed to the bad battery of leakproofness, because artifical observation electrolyte reveals consuming time, also leaks easily and examines, for this reason, through setting up detection mechanism 2, can receive electrolyte through detection mechanism 2, whether the leakproofness of coming the quick judgement lithium cell is bad, and has the weeping risk.

Specifically, detection mechanism 2, including collecting bucket 21, electrically conductive device 22 and feedback device 23, collecting bucket 21 is fixed to be set up on mounting bracket 10 under clamping device 11 for collect the electrolyte that square lithium cell was revealed by the extrusion, and electrically conductive device 22 sets up the bottom of collecting bucket 21, is used for carrying out the electric conductance after receiving electrolyte and leads to, and feedback device 23 is connected with electrically conductive device 22, is used for feeding back the condition that electrically conductive device 22 switches on.

Therefore, when cracks exist on the surface of the square lithium battery, electrolyte in the battery can leak through the cracks under the action of extrusion force, the leaked electrolyte flows downwards into the liquid collecting hopper 21, and after the conducting device 22 contacts the electrolyte in the liquid collecting hopper 21, the conducting device 22 is conducted and fed back through the feedback device 23, so that whether the battery is poor in sealing performance and has a liquid leakage risk is judged; this device simple structure can detect square lithium cell weeping fast, and can avoid artifical hourglass to examine the phenomenon and take place.

In the above embodiment, the size of the top opening of the liquid collecting bucket 21 is larger than that of the bottom opening, the top opening of the liquid collecting bucket 21 faces the holding device 11, and the conducting device 22 is disposed at the bottom end of the liquid collecting bucket 21. Because the inclination of the inner wall of the liquid collecting bucket 21 is large, after the electrolyte leaked from the surface of the battery drops on the inner wall of the liquid collecting bucket 21, the electrolyte can rapidly flow to the bottom end of the liquid collecting bucket 21, and whether the electrolyte leaks or not is rapidly detected through the conducting device 22 and the feedback device 23. When the electrolyte on the surface of the battery just drops to the bottom end of the liquid collecting hopper 21, the electrolyte can be directly contacted with the conducting device 22, and the detection efficiency is higher.

As some embodiments, the clamping device 11 includes an air cylinder 111, a first clamping plate 112 and a second clamping plate 113, the first clamping plate 112 is vertically disposed on the inner side wall of the first mounting plate 101, the second clamping plate 113 is vertically disposed on the inner side wall of the second mounting plate 102, the fixed end of the air cylinder 111 is fixedly connected with the outer side wall of the first mounting plate 101, and the telescopic end of the air cylinder 111 passes through the first mounting plate 101 and is fixedly connected with the first clamping plate 112. From this setting, place the lithium cell that awaits measuring between first splint 112 and second splint 113, be close to second splint 113 through the first splint 112 of cylinder 111 drive to the realization extrudees the lithium cell.

Because the lithium cell is pressing from both sides by clamping device 11 and is pressing from both sides the in-process of exerting pressure, the crack on lithium cell surface is not necessarily all present in lithium cell lower surface, also can be present in lithium cell upper surface or other positions, from this one, the lithium cell can flow along lithium cell surface after electrolyte is revealed when the extrusion to adhere to on lithium cell surface, when revealing the volume less, electrolyte can't be collected by collecting hopper 21, and then can take place to leak and examine the problem.

Therefore, this embodiment passes through rotary device 12, rotates the lithium cell, and when being worth noting, rotary device 12 can control the rotation speed of lithium cell, keeps the lithium cell rotatory at a slow speed, and then can make the electrolyte that lithium cell surface optional position was revealed flow into the collecting hopper 21 downwards to quick being detected by electrically conductive device 22.

In this embodiment, the rotating device 12 includes a rotating electrical machine 121, a speed reducer 122, a first bearing 123 and a second bearing 124, the speed reducer 122 is fixedly installed on the outer side wall of the second clamp plate 113, the second clamp plate 113 is rotatably connected with the second mounting plate 102 through the second bearing 124, an input shaft of the speed reducer 122 is fixedly connected with an output shaft of the rotating electrical machine 121, an output shaft of the speed reducer 122 passes through the second clamp plate 113 and the second bearing 124 and is fixedly connected with the second clamp plate 113, the first bearing 123 is fixedly installed on one surface of the first clamp plate 112 close to the first mounting plate 101, and a telescopic end of the air cylinder 111 passes through the first mounting plate 101 and is rotatably connected with the first bearing 123. From this setting, first splint 112 and second splint 113 mutually support and carry out the centre gripping to the lithium cell, first splint 112 rotates through the flexible end of first bearing 123 with cylinder 111 to be connected, second splint 113 rotates through second bearing 124 and second mounting panel 102 to be connected, reduction gear 122 reduces the rotatory rotational speed of motor, output low-speed high torque, thereby drive second splint 113 and rotate, second splint 113 is rotatory for second mounting panel 102 through second bearing 124, at rotatory in-process, it rotates for the flexible end of cylinder 111 through first bearing 123 to drive lithium cell and first splint 112, through the low-speed rotation, can avoid the high-speed rotation of lithium cell, the electrolyte that lithium cell surface revealed splashes away. When the pressing operation is performed, the second clamping plate 113, the speed reducer 122 and the second mounting plate 102 are fixed to each other, and the cylinder 111 pushes the first clamping plate 112 to move closer to the second clamping plate 113 by pushing the first bearing 123, so as to press the lithium battery.

In the above embodiment, the opposite surfaces of the first clamping plate 112 and the second clamping plate 113 are provided with the clamping grooves 1110 for mounting the batteries. The lithium battery is conveniently positioned, and the lithium battery is prevented from slipping in the extrusion or rotation process.

Because first splint 112 and second splint 113 belong to the rigidity material, order about at cylinder 111 and extrude the lithium cell, easily take place to transship, cause lithium cell extrusion deformation, lead to follow-up unable use.

Therefore, the scheme adopted by the embodiment is as follows: in this embodiment, the buffering assembly 13 is further disposed on the pressing mechanism 1, the buffering assembly 13 includes a fixing plate 130 and at least two buffering devices 131, the fixing plate 130 is vertically disposed between the second clamping plate 113 and the second mounting plate 102, the fixing plate 130 is rotatably connected to the second mounting plate 102 through the second bearing 124, the at least two buffering devices 131 are horizontally disposed between the second clamping plate 113 and the fixing plate 130, and the at least two buffering devices 131 are arranged at equal intervals around the output shaft of the rotating electrical machine 121, so that the buffering force balance can be realized. Buffer 131 includes barrel casing 1311, slide bar 1312, limiting plate 1313 and first spring 1314, barrel casing 1311 horizontal fixation sets up at fixed plate 130 lateral wall, has the installation cavity in barrel casing 1311, and barrel casing 1311 has the installing port that is linked together with the installation cavity towards the one end of second splint 113, and the bore of installing port is less than the installation cavity internal diameter, and the one end and the horizontal fixed connection of second splint 113 of slide bar 1312, the other end pass the installing port and stretch into the installing cavity and with limiting plate 1313 fixed connection, first spring 1314 sets up in the installing cavity, and its one end supports with limiting plate 1313 and holds, and the other end supports with fixed plate 130 lateral wall.

Adopt above-mentioned technical scheme, when first splint 112 is close to second splint 113, under the effect of translation thrust, second splint 113 compresses the spring in barrel casing 1311 through limiting plate 1313 of slide bar 1312 tip, is compressed through the spring, can make the battery when receiving the extrusion, carries out the buffering release of extrusion force through the spring, realizes carrying out flexible unsteady centre gripping to the battery, exerts pressure gradually and then avoids the battery to warp at the extrusion in-process to the battery.

After the pressing operation is completed, the spring returns to push the stop plate 1313 to move the sliding rod 1312 toward the first clamp 112, so that the second clamp 113 is returned, and the stop plate 1313 is confined in the installation cavity.

In order to further improve the battery extrusion buffering effect, the buffering assembly 13 of this embodiment further includes an arc-shaped elastic member 132, the arc-shaped elastic member 132 is located between the at least two buffering devices 131, two free ends of the arc-shaped elastic member 132 are respectively fixedly connected to the side walls of the fixing plate 130, the arc-shaped protruding portion of the arc-shaped elastic member 132 is fixedly connected to the side wall of the second clamping plate 113, and a second spring 133 is horizontally connected between the middle portion of the arc-shaped elastic member 132 and the fixing plate 130. From this setting, second splint 113 carries out the extrusion force buffering through a plurality of buffer 131 on the one hand when receiving horizontal extrusion force, and on the other hand, through compressing arc elastic component 132, also realizes carrying out the atress buffering to second splint 113 through the deformation of arc elastic component 132, and second spring 133 also can provide the cushion force simultaneously.

In some preferred embodiments, the conducting device 22 includes a positive conducting rod 221 and a negative conducting rod 222, the positive conducting rod 221 and the negative conducting rod 222 are arranged side by side at the bottom end of the liquid collecting bucket 21, a gap is arranged between the positive conducting rod 221 and the negative conducting rod 222, and the positive conducting rod 221 and the negative conducting rod 222 are respectively connected with the feedback device 23. With this arrangement, after the liquid collecting bucket 21 receives the electrolyte, the electrode liquid flows to the bottommost end along the inclined liquid collecting bucket 21 and falls between the positive electrode conductive rod 221 and the negative electrode conductive rod 222, the positive electrode conductive rod 221 and the negative electrode conductive rod 222 are conducted by the electrolyte conductive medium, and then the feedback device 23 feeds back a level signal.

The feedback device 23 includes a controller 231 and a warning light 232, an input end of the controller 231 is connected to the conducting device 22, and an output end of the controller 231 is connected to the warning light 232. When the positive conductive rod 221 and the negative conductive rod 222 are conducted when contacting the electrolyte, the controller 231 controls the warning lamp 232 to work after receiving the level signal, and further determines that the battery leaks. In this embodiment, the controller 231 can be a control circuit board, and when the conductive device 22 is turned on, the control circuit board controls the warning light 232 to light up, so that it can be determined that the lithium battery to be detected is a poor battery with sealing property, and a leakage exists, and the repair or the scrapping treatment is required.

Preferably, the detection mechanism 2 further comprises a waste liquid box 24, and the waste liquid box 24 is positioned below the base 103 of the liquid collecting bucket 21. With this arrangement, the electrolyte in the collecting hopper 21 can be directly introduced into the waste liquid tank 24 and collected after being detected by the conductive device 22.

The utility model discloses a theory of operation is:

placing a square lithium battery to be tested between a first clamping plate 112 and a second clamping plate 113, firstly carrying out side clamping, then driving the first clamping plate 112 to move towards the second clamping plate 113 through an air cylinder 111 to apply a certain extrusion force to the lithium battery, and driving the lithium battery to rotate through a rotating device 12, when a crack exists on the surface of the square lithium battery, electrolyte inside the battery can leak through the crack under the action of the extrusion force, the electrolyte leaked from any position on the surface of the battery downwards flows into a liquid collecting hopper 21, when a conductive device 22 contacts the electrolyte in the liquid collecting hopper 21, the conductive device 22 is conducted, a controller 231 controls a warning lamp 232 to work after receiving a level signal, and then the leakage of the battery is judged; when the battery needs to be taken out, the cylinder 111 is operated in the reverse direction.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a square lithium cell weeping detection device which characterized in that includes:

the extrusion mechanism (1) comprises an installation frame (10) and a clamping device (11), wherein the clamping device (11) is arranged at the top of the installation frame (10) and is used for clamping and extruding the square lithium battery;

the detection mechanism (2) comprises a liquid collecting bucket (21), a conductive device (22) and a feedback device (23), wherein,

the liquid collecting hopper (21) is fixedly arranged on the mounting frame (10) right below the clamping device (11) and used for collecting electrolyte leaked by extrusion of the square lithium battery, the size of the top opening of the liquid collecting hopper (21) is larger than that of the bottom opening, and the top opening of the liquid collecting hopper (21) is opposite to the clamping device (11);

the conducting device (22) is arranged at the bottom end of the liquid collecting hopper (21) and is used for conducting electricity after receiving the electrolyte; the feedback device (23) is connected with the conducting device (22) and is used for feeding back the conducting condition of the conducting device (22).

2. The device for detecting leakage of lithium prismatic battery as claimed in claim 1, wherein: mounting bracket (10) include base (103) and vertical first mounting panel (101) and the second mounting panel (102) of setting on base (103), and first mounting panel (101) and second mounting panel (102) are parallel to each other and the interval sets up, and clamping device (11) level sets up between first mounting panel (101) and second mounting panel (102).

3. The device for detecting leakage of lithium prismatic battery as claimed in claim 2, wherein: clamping device (11) are including cylinder (111), first splint (112) and second splint (113), first splint (112) vertical setting is at first mounting panel (101) inside wall, and the vertical setting of second splint (113) is at second mounting panel (102) inside wall, the stiff end and first mounting panel (101) lateral wall fixed connection of cylinder (111), and first mounting panel (101) and first splint (112) fixed connection are passed to the flexible end of cylinder (111).

4. The device for detecting leakage of lithium prismatic battery as claimed in claim 3, wherein: still include rotary device (12), rotary device (12) include rotating electrical machines (121), reduction gear (122), first bearing (123) and second bearing (124), reduction gear (122) fixed mounting is in second splint (113) lateral wall, second splint (113) rotate with second mounting panel (102) through second bearing (124) and are connected, the input shaft of reduction gear (122) and the output shaft fixed connection of rotating electrical machines (121), the output shaft of reduction gear (122) passes second splint (113) and second bearing (124) and with second splint (113) fixed connection, first bearing (123) fixed mounting is in the one side that first splint (112) are close to first mounting panel (101), the flexible end of cylinder (111) passes first mounting panel (101) and rotates with first bearing (123) and is connected.

5. The device for detecting leakage of lithium prismatic battery according to claim 4, wherein: the buffer component (13) comprises a fixing plate (130) and at least two buffer devices (131), the fixing plate (130) is vertically arranged between the second clamping plate (113) and the second mounting plate (102), the fixing plate (130) is rotatably connected with the second mounting plate (102) through a second bearing (124), the at least two buffer devices (131) are horizontally arranged between the second clamping plate (113) and the fixing plate (130), the at least two buffer devices (131) are arranged around an output shaft of the rotating motor (121) at equal intervals, each buffer device (131) comprises a barrel sleeve (1311), a sliding rod (1312), a limiting plate (1313) and a first spring (1314), the barrel sleeve (1311) is horizontally and fixedly arranged on the side wall of the fixing plate (130), an installation cavity is arranged in the barrel sleeve (1311), an installation port communicated with the installation cavity is arranged at one end, facing the second clamping plate (113), of the barrel sleeve (1311), the caliber of the installation port is smaller than the inner diameter of the installation cavity, one end of the sliding rod (113) is fixedly connected with the second clamping plate (113), the other end of the installation port penetrates through the installation port and is connected with the fixing plate (1313) and is abutted against the fixing plate (130).

6. The device for detecting leakage of lithium prismatic battery as claimed in claim 5, wherein: buffer unit (13) still includes arc elastic component (132), arc elastic component (132) are located in the middle of two at least buffer (131), two free ends of arc elastic component (132) respectively with fixed plate (130) lateral wall fixed connection, the arc bellying and second splint (113) lateral wall fixed connection of arc elastic component (132), horizontally connect has second spring (133) between arc elastic component (132) middle part and fixed plate (130).

7. The device for detecting leakage of lithium prismatic battery as claimed in claim 3, wherein: and a clamping groove (1110) for mounting a battery is formed in the opposite surface of the first clamping plate (112) and the second clamping plate (113).

8. The device for detecting leakage of lithium prismatic battery as claimed in claim 1, wherein: the conducting device (22) comprises a positive conducting rod (221) and a negative conducting rod (222), the positive conducting rod (221) and the negative conducting rod (222) are arranged at the bottom end of the liquid collecting bucket (21) side by side, a gap is formed between the positive conducting rod (221) and the negative conducting rod (222), and the positive conducting rod (221) and the negative conducting rod (222) are connected with the feedback device (23) respectively.

9. The device for detecting leakage of lithium prismatic battery as claimed in claim 8, wherein: the feedback device (23) comprises a controller (231) and a warning lamp (232), the input end of the controller (231) is connected with the conducting device (22), and the output end of the controller (231) is connected with the warning lamp (232).

10. The device for detecting leakage of lithium prismatic battery as claimed in claim 1, wherein: the detection mechanism (2) further comprises a waste liquid box (24), and the waste liquid box (24) is located below the base (103) of the liquid collecting hopper (21).