CN112729689A

CN112729689A - Liquid leakage detection device

Info

Publication number: CN112729689A
Application number: CN202011388805.XA
Authority: CN
Inventors: 陈锋
Original assignee: Shanghai Cenat New Energy Co Ltd
Current assignee: Shanghai Cenat New Energy Co Ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-04-30

Abstract

The invention relates to the field of battery module detection, and provides a leakage detection device which comprises a cavity, a sealing cover, a vacuumizing pipeline and a detection assembly, wherein the cavity is provided with a test cavity for accommodating a battery module; the sealing cover is used for sealing and covering the cavity opening of the testing cavity; one end of the vacuumizing pipeline is hermetically connected with the cavity and communicated with the testing cavity; the detection assembly is connected to the vacuumizing pipeline, and the detection assembly can extract gas in the testing cavity through the vacuumizing pipeline and detect the leakage degree of the electrolyte of the battery module. The leakage detection device arranges the battery module in the relatively sealed test cavity firstly, and the gas in the test cavity is extracted from the vacuumizing pipeline through the detection assembly, and the leakage and volatilization degree of the electrolyte of the battery module are judged based on the extracted gas parameters, so that whether the leakage phenomenon exists in the battery module in the test cavity is reliably and effectively judged, the judgment is accurate, the detection accuracy is high, and the defective products of the battery module can be effectively prevented from flowing into the post-process or even flowing into the market.

Description

Liquid leakage detection device

Technical Field

The invention belongs to the technical field of battery module detection, and particularly relates to a leakage detection device.

Background

The outside of the battery core is usually coated by an aluminum-plastic film, and in the production process of the battery, the aluminum-plastic film is easily scratched or punctured by sharp foreign matters, so that the leakage of the battery core is caused. However, after the battery modules are formed by the plurality of battery cells in an array mode along the thickness direction of the battery cells, the leakage of the battery cells is difficult to identify through sense organs.

In the related art, it is generally determined whether there is a leakage phenomenon by testing whether the battery module is insulated. However, it needs to be revealed more, the insulating layer of battery module is corroded based on electrolyte to and when electrolyte constitutes shell and electric core these three conditions of return circuit and satisfies simultaneously, just can test out the insulating resistance of battery module and be lower, and the warning battery module has the weeping phenomenon. Therefore, the problem of low detection accuracy is inevitable in the conventional mode for detecting whether the battery module has a liquid leakage phenomenon, so that defective products easily flow into a post-process and even into the market, and a large potential safety hazard exists.

Disclosure of Invention

The embodiment of the invention aims to provide a leakage detection device, which is used for solving the technical problem of low detection accuracy in the existing mode of detecting whether a battery module has a leakage phenomenon.

In order to achieve the purpose, the invention adopts the technical scheme that: a liquid leakage detection apparatus comprising:

the battery module testing device comprises a cavity body and a testing device, wherein the cavity body is provided with a testing cavity for accommodating the battery module;

the sealing cover is used for sealing and covering the cavity opening of the testing cavity;

one end of the vacuumizing pipeline is hermetically connected with the cavity and communicated with the testing cavity;

the detection assembly is connected to the vacuumizing pipeline, and the detection assembly can extract gas in the testing cavity through the vacuumizing pipeline and detect the leakage degree of the electrolyte of the battery module.

Through adopting above-mentioned scheme, can arrange the battery module that awaits measuring in a relatively sealed test cavity earlier, rethread determine module follows the gas of evacuation pipeline extraction test cavity, and judge revealing of the electrolyte of battery module based on the gaseous relevant parameter of extraction, the degree of volatilizing, and then can be reliable, judge effectively whether there is the weeping phenomenon in the battery module of test cavity, judge accurately, detection accuracy is high, can effectively avoid the defective products of battery module to flow into back process and even flow into market, thereby the potential safety hazard has been reduced, the guarantee has improved the security of the product that flows into market.

In one embodiment, the detection assembly comprises a vacuum pump, a first electromagnetic valve, a VOC detector, a first stop valve and a signal processor, wherein the vacuum pump is connected to the vacuumizing pipeline and is used for vacuumizing the test cavity through the vacuumizing pipeline; the first electromagnetic valve, the VOC detector and the first stop valve are sequentially connected to the vacuum-pumping pipeline along the gas flow direction; the signal processor is electrically connected with the VOC detector.

Through adopting above-mentioned scheme, can judge whether there is electrolyte phenomenon of volatilizing in the test cavity based on the air VOC content value change condition around the evacuation, and then can reliably, judge effectively whether there is the weeping phenomenon in the battery module of test cavity, judge accurately, detection accuracy is high, can effectively avoid the defective products of battery module to flow into back process and flow into market even to the potential safety hazard has been reduced, the guarantee has improved the security of the product that flows into market.

In one embodiment, the detection assembly further comprises a regulating valve connected to a side of the evacuated tube proximate to the test chamber.

Through adopting above-mentioned scheme, can further carry out basic accurate regulation to the gas flow in the evacuation pipeline to can effectively avoid taking place because of the too big condition that leads to the detection precision variation of VOC detector of gas flow, can further ensure promptly and improve weeping detection device's detection precision, detection accuracy.

In one embodiment, the detection assembly further comprises a first muffler connected to an end of the evacuated tube proximate the first shut-off valve.

Through adopting above-mentioned scheme, can follow gas flow direction and further arrange first muffler on the evacuation pipeline, so, gas can be through first muffler and discharge again behind first stop valve to can effectively noise abatement pollution, improve weeping detection device's performance.

In one embodiment, the detection assembly further comprises a shunt pipeline, one end of which is communicated with the vacuumizing pipeline, and a second electromagnetic valve and a second stop valve which are sequentially connected to the shunt pipeline along the gas flowing direction, wherein the end of the shunt pipeline communicated with the vacuumizing pipeline is positioned between the vacuum pump and the VOC detector.

Through adopting above-mentioned scheme, can all open when first solenoid valve, first stop valve, second solenoid valve and second stop valve, shunt gas through the reposition of redundant personnel pipeline before gaseous process VOC detector to can further avoid taking place because of the too big condition that leads to the detection precision variation of VOC detector of airflow, can further ensure and improve weeping detection device's detection precision, detection accuracy.

In addition, by adopting the above scheme, the first electromagnetic valve can be closed and the first stop valve, the second electromagnetic valve and the second stop valve can be kept opened during non-detection, so that air can flow along the direction of the first stop valve, the second electromagnetic valve and the second stop valve or along the direction of the second stop valve, the second electromagnetic valve and the first stop valve, so as to blow off residual gas in the vacuumizing pipeline and the shunt pipeline, and therefore, the interference of the detection result of the previous battery module on the detection result of the next battery module can be effectively avoided, and the detection precision and the detection accuracy of the liquid leakage detection device can be further ensured and improved.

In one embodiment, the detection assembly further comprises a second muffler connected to an end of the diversion conduit proximate the second shut-off valve.

Through adopting above-mentioned scheme, can follow the gas flow direction and further arrange the second muffler on the reposition of redundant personnel pipeline, so, gaseous behind the second stop valve, can discharge again through the second muffler again to noise abatement pollution can further improve weeping detection device's performance.

In one embodiment, the detection assembly further comprises:

the first pressure gauge is connected between the end part of the flow dividing pipeline communicated with the vacuumizing pipeline and the first electromagnetic valve;

and the second pressure gauge is connected between the second electromagnetic valve and the second stop valve.

Through adopting above-mentioned scheme, the gaseous pressure before the reposition of redundant personnel of first manometer real time monitoring of accessible to through the gaseous pressure in the second manometer real time monitoring reposition of redundant personnel pipeline, thereby can be based on pressure monitoring, further avoid taking place because of the too big condition that leads to the detection precision variation of VOC detector of airflow, can further ensure and improve weeping detection device's detection precision, detection accuracy.

In one embodiment, the detection assembly further comprises a display electrically connected to the signal processor.

Through adopting above-mentioned scheme, control system can show the judged result whether there is the weeping phenomenon with the battery module directly perceivedly on the display to whether operating personnel direct observation arrives the battery module of current detection and is the defective products, thereby can further improve weeping detection device's performance.

In one embodiment, the inner surface of the cavity is provided with an insulating coating.

Through adopting above-mentioned scheme, can effectively avoid battery module and cavity generating circuit conduction phenomenon after being put into the test chamber, avoid battery module short circuit promptly to can ensure battery module performance around the test, avoid the yields to be damaged.

In one embodiment, the cavity is provided with a sealing ring at the edge of the cavity opening.

By adopting the above scheme, accessible sealing ring further ensures the closing cap when supporting the pressure cavity with the cavity be connected the leakproofness, can effectively avoid appearing leaking gas the phenomenon between closing cap and the cavity, can improve weeping detection device's test operation efficiency to a certain extent.

In one embodiment, the leakage detection device further comprises a pressing driver connected with the cover and used for driving the cover to lift, and a supporting structure used for supporting the pressing driver.

By adopting the scheme, the pressing driver can be supported by the supporting structure, then the sealing cover can be driven to lift relative to the cavity by the pressing driver, and when the sealing cover covers the cavity, the sealing cover continuously applies balanced and stable abutting force to the sealing cover, so that the sealing cover stably, reliably and continuously seals and covers the cavity, the service performance of the leakage detection device can be improved, and the automation degree of the leakage detection device can be improved.

In one embodiment, the leakage detection device further comprises at least one guide post connected with the cover, and at least one guide sleeve connected with the support structure and in sleeve fit with the guide post.

Through adopting above-mentioned scheme, can be when compressing tightly driver drive closing cap and go up and down, through the cooperation of cup jointing of guide pillar and a plurality of guide pin bushings, lead to the lifting movement of closing cap to can do benefit to the removal stationarity that improves the closing cap, and do benefit to the utility of closing cap and guarantee.

In one embodiment, the leakage detection device further comprises a pressure sensor connected to the pressing actuator and adapted to detect a pressure between the cover and the cavity.

By adopting the above scheme, accessible pressure sensor supports the pressure value that presses the cavity to the closing cap when the closing cap lid closes the cavity and detects to based on the pressure value, whether the closing cap is sealed to close the cavity is judged to accurate, accuracy, thereby does benefit to guarantee that subsequent operation can go on smoothly, does benefit to the guarantee and improves weeping detection device's measuring accuracy, and does benefit to the test operation efficiency that further improves weeping detection device.

In one embodiment, the leakage detection device further comprises a position adjustment assembly connected to the pressing driver for adjusting the planar position of the cover.

By adopting the scheme, the plane position of the sealing cover can be accurately and automatically adjusted through the position adjusting assembly, so that the sealing cover can be accurately aligned with the cavity, the use performance of the leakage detection device can be further improved, the detection efficiency of the leakage detection device can be further improved, and the automation degree of the leakage detection device can be further improved.

In one embodiment, the leakage detection device further comprises a grabbing mechanism connected with the position adjusting assembly, wherein the grabbing mechanism is used for grabbing the battery module from the loading station to the testing chamber or grabbing the battery module from the testing chamber to the discharging station.

Through adopting above-mentioned scheme, can snatch the plane position of mechanism through the adjustment of position adjustment subassembly earlier, the rethread snatchs the mechanism and will wait that the battery module that detects snatchs to the test chamber from the material loading station, or will detect the battery module that accomplishes and snatch to ejection of compact station from the test chamber, based on this, can further improve weeping detection device's degree of automation, further improve weeping detection device's performance, further improve weeping detection device's detection efficiency.

In one embodiment, the leakage detection device further comprises a conveying mechanism for conveying the battery module, and the conveying mechanism passes through the feeding station and the discharging station.

Through adopting above-mentioned scheme, transport mechanism can convey the battery module that awaits measuring to the material loading station to wait to snatch the mechanism and take the battery module and go to detect, and can wait to bear the battery module that detects the completion at the material unloading station, get into next process with the battery module that the conveying detected the completion. Based on this, can further improve the degree of automation of weeping detection device, further improve the performance of weeping detection device, further improve the whole operating efficiency of weeping detection device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a leakage detection apparatus according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of the leakage detection device shown in fig. 1;

FIG. 3 is a schematic diagram of the chamber and evacuation line provided in FIG. 1;

FIG. 4 is a schematic view of a portion of the leakage detection apparatus provided in FIG. 1;

fig. 5 is a schematic diagram of a detection assembly according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1' -a battery module; 1-cavity, 101-test cavity, 110-sealing ring; 2-sealing the cover; 3-vacuum pumping pipeline; 4-a vacuum pump; 5-a first solenoid valve; 6-VOC detector; 7-a first stop valve; 8-a signal processor; 9-adjusting valve; 10-a first muffler; 11-a shunt conduit; 12-a second solenoid valve; 13-a second stop valve; 14-a second muffler; 15-a first pressure gauge; 16-a second pressure gauge; 17-a display; 18-a compression drive; 19-a support structure; 20-guide column; 21-guide sleeve; 22-a pressure sensor; 23-position adjustment assembly, 2310-support beam, 2320-slider, 2330-slide rail; 24-a grasping mechanism, 2410-a grasping assembly, 2420-a lift driver; 25-transport mechanism, 2510-tray; 26-a jacking mechanism.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes a specific implementation of the present invention in more detail with reference to specific embodiments:

referring to fig. 1, fig. 2, fig. 3, and fig. 5, an embodiment of the invention provides a liquid leakage detection device, which includes a chamber 1, a sealing cover 2, a vacuum pipe 3, and a detection assembly, wherein the chamber 1 has a test cavity 101 for accommodating a battery module 1'; the sealing cover 2 is used for sealing and covering the cavity opening of the testing cavity 101; one end of the vacuumizing pipeline 3 is hermetically connected with the cavity 1 and communicated with the testing cavity 101; the detection assembly is connected to the vacuumizing pipeline 3, and the detection assembly can extract gas in the test cavity 101 through the vacuumizing pipeline 3 and detect the leakage degree of the electrolyte of the battery module 1'.

It should be noted that there is a control system electrically connected to the liquid leakage detection device and controlling part or all of the structure of the liquid leakage detection device. The control system may be, but is not limited to, a PLC (Programmable Logic Controller) control system.

It should be noted here that four sides of the chamber 1 are substantially closed, only one side is left with a port, and one side is connected and communicated with the vacuum-pumping duct 3. Based on the cavity opening, it is convenient to manually or mechanically put the battery module 1' into the test cavity 101 from the cavity opening. After the battery module 1' to be tested is placed into the testing chamber 101, the opening of the testing chamber 101 can be hermetically covered by the sealing cover 2, and at the moment, the sealing cover 2 is hermetically connected with the chamber 1. Optionally, the area of the sealing connection side of the sealing cover 2 can be larger than the area of the sealing connection side of the cavity 1, so that the alignment difficulty of the sealing cover 2 and the cavity 1 is reduced, and the sealing performance of the sealing cover 2 and the cavity 1 before connection is guaranteed and improved.

Subsequently, the detection component extracts the gas in the sealed test cavity 101, if the battery module 1 'has a liquid leakage phenomenon, the leaked electrolyte can volatilize into the air in the test cavity 101, and at the moment, relevant parameters such as humidity of the gas extracted by the detection component are different from parameters of the air which does not contain the volatilized electrolyte, so that the battery module 1' in the current test cavity 101 can be judged to have the liquid leakage phenomenon and be a defective product.

Therefore, by adopting the above scheme, can arrange the battery module 1 ' that awaits measuring in a relatively sealed test cavity 101 earlier, rethread determine module draws the gas in test cavity 101 from evacuation pipeline 3, and judge revealing, the degree of volatilizing of the electrolyte of battery module 1 ' based on the relevant parameter of the gas that extracts, and then can be reliable, judge effectively whether there is the weeping phenomenon in the battery module in test cavity 101, judge accurately, detection accuracy is high, can effectively avoid the defective products of battery module 1 ' to flow into back process and even flow into market, thereby the potential safety hazard has been reduced, the guarantee has improved the security of the product that flows into market.

Referring to fig. 1, 3 and 5, the detecting assembly includes a vacuum pump 4, a first solenoid valve 5, a VOC (volatile organic compound) detector 6, a first cut-off valve 7 and a signal processor 8, wherein the vacuum pump 4 is connected to the vacuuming pipe 3 and is used for vacuuming the test chamber 101 through the vacuuming pipe 3; the first electromagnetic valve 5, the VOC detector 6 and the first stop valve 7 are sequentially connected to the vacuum-pumping pipeline 3 along the gas flow direction; the signal processor 8 is electrically connected to the VOC detector 6.

It should be noted here that before the gas in the test chamber 101 is extracted, the detection module reads the current air VOC content value through the VOC detector 6 and feeds the value back to the control system through the signal processor 8, and the control system records the value as an initial value.

Then, on the premise that the sealing cover 2 is sealed to cover the cavity 1, the first electromagnetic valve 5 and the first stop valve 7 which are connected to the vacuumizing pipeline 3 can be opened firstly, wherein the first electromagnetic valve 5 has the functions of controlling on-off and controlling gas flow direction, and the first stop valve 7 has the functions of controlling on-off, adjusting and throttling. At this time, the vacuuming pipe 3 forms a passage along the arrangement path of the first solenoid valve 5, the VOC detector 6, and the first shut-off valve 7.

Then, the vacuum pump 4 is started, the vacuum pump 4 vacuumizes the test cavity 101 for a plurality of seconds, under the negative pressure of the vacuum pump 4, gas in the test cavity 101 flows from the first electromagnetic valve 5 to the first stop valve 7 along the vacuumizing pipeline 3 and is discharged through the first stop valve 7, the VOC detector 6 continuously collects the content value of air VOC and feeds the maximum value back to the control system through the signal processor 8, and the control system records the value as a result value. If there is the weeping phenomenon in battery module 1', the electrolyte that leaks out can volatilize to the air in, and at this moment, the air VOC content value that VOC detector 6 gathered, the result value that control system received and recorded will be greater than the initial value certainly. That is, when the result value is greater than the initial value, it can be determined that the battery module 1' in the test chamber 101 has a leakage phenomenon, and is a defective product.

Therefore, through adopting above-mentioned scheme, can judge whether there is electrolyte volatilization phenomenon in the test chamber 101 based on the change condition of air VOC content value before and after the evacuation, and then can reliably, judge effectively whether there is the weeping phenomenon in the battery module 1 'in the test chamber 101, judge accurately, detection accuracy is high, can effectively avoid the defective products of battery module 1' to flow into back process and even flow into market to the potential safety hazard has been reduced, the guarantee has improved the security of the product that flows into market.

Referring to fig. 5, in the present embodiment, the detecting assembly further includes a regulating valve 9 connected to a side of the vacuuming pipe 3 close to the testing chamber 101. Wherein the regulating valve 9 is used for regulating the gas flow.

Through adopting above-mentioned scheme, can further carry out basic accurate regulation to the gas flow in the evacuation pipeline 3 to can effectively avoid leading to the condition emergence of VOC detector 6's the detection precision variation because of the gas flow is too big, can further ensure promptly and improve weeping detection device's detection precision, detection accuracy.

Referring to fig. 5, in the present embodiment, the detecting assembly further includes a first silencer 10 connected to an end of the vacuuming pipe 3 near the first cut-off valve 7.

Here, the gas is discharged through the first shut-off valve 7 by the vacuum pump 4. Through adopting above-mentioned scheme, can follow gas flow direction and further arrange first muffler 10 on evacuation pipeline 3, so, gas can be through first muffler 10 and discharge again after through first stop valve 7 to can effective noise abatement pollution, improve weeping detection device's performance.

Referring to fig. 5, in the present embodiment, the detection assembly further includes a diversion pipeline 11 having one end communicating with the vacuuming pipeline 3, and a second electromagnetic valve 12 and a second stop valve 13 sequentially connected to the diversion pipeline 11 along the gas flowing direction, wherein the end of the diversion pipeline 11 communicating with the vacuuming pipeline 3 is located between the vacuum pump 4 and the VOC detector 6.

It should be noted that, according to the structure of the present embodiment, during the detection, after passing through the vacuum pump 4, the gas is branched, wherein a part of the gas is continuously discharged through the VOC detector 6 and the first stop valve 7, and another part of the gas is discharged through the second electromagnetic valve 12 and the second stop valve 13 which are opened, that is, through the branched pipe 11. The second electromagnetic valve 12 also has the functions of controlling the on-off of the shunt pipe 11 and controlling the flow direction of the gas along the shunt pipe 11, and the first stop valve 7 has the functions of controlling the on-off, adjusting and throttling of the shunt pipe 11.

Therefore, through adopting above-mentioned scheme, can all open when first solenoid valve 5, first check valve 7, second solenoid valve 12 and second check valve 13, shunt the gas through reposition of redundant personnel pipeline 11 before gas process VOC detector 6 to can further avoid taking place because of the too big condition that leads to VOC detector 6's detection precision variation of airflow, can further ensure and improve weeping detection device's detection precision, detection accuracy.

In addition, by adopting the above scheme, during the non-detection period, the first electromagnetic valve 5 is closed, and the opening of the first stop valve 7, the second electromagnetic valve 12 and the second stop valve 13 is maintained, so that the air can flow in the direction of the first stop valve 7, the second electromagnetic valve 12 and the second stop valve 13, or in the direction of the second stop valve 13, the second electromagnetic valve 12 and the first stop valve 7, so as to completely blow the residual gas in the vacuumizing pipeline 3 and the shunting pipeline 11, thereby effectively avoiding the interference of the detection result of the previous battery module 1 'on the detection result of the next battery module 1', and further ensuring and improving the detection precision and the detection accuracy of the liquid leakage detection device.

Referring to fig. 5, in the present embodiment, the detecting assembly further includes a second muffler 14 connected to an end of the diversion pipe 11 close to the second stop valve 13.

Here, the gas flowing into the diversion duct 11 is discharged through the second shutoff valve 13. Through adopting above-mentioned scheme, can follow gas flow direction and further arrange second muffler 14 on reposition of redundant personnel pipeline 11, so, gaseous behind second stop valve 13, can discharge again through second muffler 14 again to can further noise abatement pollution, further improve weeping detection device's performance.

Referring to fig. 5, in the present embodiment, the detection assembly further includes a first pressure gauge 15 and a second pressure gauge 16, wherein the first pressure gauge 15 is connected between the end of the diversion pipe 11, which is communicated with the vacuuming pipe 3, and the first electromagnetic valve 5; a second pressure gauge 16 is connected between the second solenoid valve 12 and the second shut-off valve 13.

Through adopting above-mentioned scheme, the gaseous pressure before the reposition of redundant personnel of 15 real time monitoring of accessible first manometer to through the gaseous pressure in the 16 real time monitoring of second manometer reposition of redundant personnel pipeline 11, thereby can be based on pressure monitoring, further avoid leading to the condition emergence of VOC detector 6's the detection precision variation because of the airflow is too big, can further ensure and improve weeping detection device's detection precision, detection accuracy.

Referring to fig. 1, fig. 2 and fig. 5, in the present embodiment, the detecting assembly further includes a display 17 electrically connected to the signal processor 8.

By adopting the above scheme, the control system can visually display the judgment result of whether the battery module 1 'has the liquid leakage phenomenon on the display 17, so that an operator can directly observe whether the currently detected battery module 1' is a defective product, and the service performance of the liquid leakage detection device can be further improved.

Referring to fig. 3, in the present embodiment, an insulating coating is disposed on an inner surface of the cavity 1.

Through adopting above-mentioned scheme, can effectively avoid battery module 1 ' to take place the circuit with cavity 1 behind being put into test chamber 101 and switch on the phenomenon, avoid battery module 1 ' short circuit promptly to can guarantee the performance of battery module 1 ' before the test, avoid the yields to be damaged.

Alternatively, the above-described insulating coating may be formed by, but not limited to, spraying insulating varnish on the inner surface of the cavity 1.

Referring to fig. 3, in the present embodiment, the cavity 1 is provided with a sealing ring 110 at the edge of the cavity opening.

It should be noted that, the cavity 1 is connected to a sealing strip at any edge of the cavity opening, and the sealing strips are sequentially connected end to form the sealing ring 110. Therefore, by adopting the above scheme, the sealing ring 110 can further ensure the sealing performance of the sealing cover 2 in connection with the cavity 1 when the sealing cover is pressed against the cavity 1, so that the air leakage phenomenon between the sealing cover 2 and the cavity 1 can be effectively avoided, and the test operation efficiency of the leakage detection device can be improved to a certain extent.

Referring to fig. 1 and 4, in the present embodiment, the liquid leakage detecting device further includes a pressing driver 18 connected to the cover 2 and configured to drive the cover 2 to move up and down, and a supporting structure 19 configured to support the pressing driver 18. Wherein the drive rod of the pressure drive 18 is connected to the cover 2.

By adopting the above scheme, the pressing driver 18 can be supported by the supporting structure 19, then the sealing cover 2 can be driven by the pressing driver 18 to lift relative to the cavity 1, and when the sealing cover 2 covers the cavity 1, the sealing cover 2 is continuously applied with balanced and stable abutting force, so that the sealing cover 2 stably, reliably and continuously seals and covers the cavity 1, the service performance of the leakage detection device can be improved, and the automation degree of the leakage detection device can be improved.

Referring to fig. 1 and 4, in the present embodiment, the supporting structure 19 is disposed between the pressing driver 18 and the cover 2, and the liquid leakage detecting device further includes at least one guide post 20 connected to the cover 2, and at least one guide sleeve 21 connected to the supporting structure 19 and in sleeve fit with the guide post 20.

Through adopting above-mentioned scheme, can be when compressing tightly driver 18 drive closing cap 2 and go up and down, through guide pillar 20 and a plurality of guide pin bushing 21 cup joint the cooperation relation, lead to the lift removal of closing cap 2 to can do benefit to the mobility stationarity that improves closing cap 2, and do benefit to the utility to closing cap 2 and guarantee.

Referring to fig. 1 and 4, in the present embodiment, the liquid leakage detecting device further includes a pressure sensor 22 connected to the pressing driver 18 and used for detecting the pressure between the cover 2 and the chamber 1.

Through adopting above-mentioned scheme, accessible pressure sensor 22 supports the pressure value that presses cavity 1 to closing cap 2 when closing cavity 1 at closing cap 2 lid and detects to based on the pressure value, whether accurate, the accurate judgement closing cap 2 seals the lid and closes cavity 1, thereby do benefit to guarantee that subsequent operation can go on smoothly, do benefit to the guarantee and improve weeping detection device's measuring accuracy, and do benefit to the test operation efficiency that further improves weeping detection device.

Alternatively, when the pressure value detected by the pressure sensor 22 is not within the set range, the liquid leakage detection device may send an early warning to the operator in an alarm manner.

When the pressure value detected by the pressure sensor 22 is within the set range, it is determined that the sealing cover 2 has been sealed to cover the cavity 1, and subsequent operations such as vacuum pumping and detection can be performed.

Referring to fig. 1 and 2, in the present embodiment, the liquid leakage detecting apparatus further includes a position adjusting assembly 23 connected to the pressing driver 18 for adjusting the plane position of the cover 2.

It should be noted here that the position adjustment assembly 23 is connected to the pressing drive 18 and can move the pressing drive 18 and the cover 2 in a plane. Alternatively, as shown in fig. 1, the position adjustment assembly 23 includes a supporting beam 2310 connected to the pressing driver 18, two sliders 2320 supported at two ends of the supporting beam 2310, and two slide rails 2330 slidably connected to the sliders 2320, respectively.

Therefore, by adopting the above scheme, the planar position of the sealing cover 2 can be accurately and automatically adjusted through the position adjusting assembly 23, so as to ensure that the sealing cover 2 can be accurately aligned with the cavity 1, thereby further improving the service performance of the leakage detection device, further improving the detection efficiency of the leakage detection device, and further improving the automation degree of the leakage detection device.

Referring to fig. 1 and 2, in the present embodiment, the leakage detecting apparatus further includes a grabbing mechanism 24 connected to the position adjusting assembly 23, and the grabbing mechanism 24 is used for grabbing the battery module 1 'from the feeding station to the testing chamber 101, or is used for grabbing the battery module 1' from the testing chamber 101 to the discharging station.

Through adopting above-mentioned scheme, can snatch the plane position of mechanism 24 through position adjustment subassembly 23 adjustment earlier, rethread snatchs mechanism 24 and will wait that the battery module 1 ' that detects snatchs to test chamber 101 from the material loading station, or will detect the battery module 1 ' that accomplishes and snatch to ejection of compact station from test chamber 101, on this basis, can further improve weeping detection device's degree of automation, further improve weeping detection device's performance, further improve weeping detection device's detection efficiency.

It should be further noted that the grabbing mechanism 24 includes a grabbing component 2410 and a lifting driver 2420 connected to the grabbing component 2410 and used for driving the grabbing component 2410 to lift and lower. At the loading station, the position corresponding to the test cavity 101 and the discharging station, the lifting driver 2420 can drive the grabbing component 2410 to lift so as to lightly take and put the battery module 1 ', thereby further ensuring the quality of the battery module 1' before and after testing.

Referring to fig. 1 and 2, in the present embodiment, the leakage detecting device further includes a conveying mechanism 25 for conveying the battery module 1', and the conveying mechanism 25 passes through the feeding station and the discharging station.

Through adopting above-mentioned scheme, transport mechanism 25 can convey the battery module 1 'that awaits measuring to the material loading station to wait to snatch mechanism 24 and take battery module 1' and go to detect, and can wait to bear the weight of the battery module 1 'that detects the completion at the material unloading station, with the battery module 1' that the transmission detected the completion and get into next process. Based on this, can further improve the degree of automation of weeping detection device, further improve the performance of weeping detection device, further improve the whole operating efficiency of weeping detection device.

It should be further noted that, a jacking mechanism 26 is further provided below the tray 2510 of the conveying mechanism 25 for carrying the battery module 1 ', and the jacking mechanism 26 can jack the tray 2510 at the feeding station and the discharging station to cooperate with the grabbing mechanism 24 to pick and place the battery module 1' on the tray 2510, so that the automation degree of the leakage detection device can be further improved, and the overall operation efficiency of the leakage detection device can be further improved.

To sum up, from battery module 1's transport, closing cavity 1, evacuation, detection etc. is closed to closing lid 2, weeping detection device full automatization operation, detection efficiency is high, and detection precision is high, and detection accuracy is high, can accurately judge whether battery module 1 ' has the weeping phenomenon, can effectively avoid battery module 1 ' defective products to flow into back process and even flow into market, do benefit to the security performance that improves relevant product.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A liquid leakage detection device, comprising:

the detection assembly is connected with the vacuumizing pipeline, and can extract gas in the test cavity through the vacuumizing pipeline and detect the leakage degree of the electrolyte of the battery module.

2. The leak detection apparatus as defined in claim 1, wherein the detection assembly includes a vacuum pump, a first solenoid valve, a VOC detector, a first shut-off valve, and a signal processor, wherein the vacuum pump is connected to the evacuated tube and is adapted to evacuate the test chamber through the evacuated tube; the first electromagnetic valve, the VOC detector and the first stop valve are sequentially connected to the vacuumizing pipeline along the gas flow direction; the signal processor is electrically connected with the VOC detector.

3. The leak detection apparatus as defined in claim 2, wherein said detection assembly further comprises a regulator valve connected to a side of said evacuated tube adjacent said test chamber, a first acoustic damper connected to an end of said evacuated tube adjacent said first shut-off valve.

4. The leak detection apparatus according to claim 2, wherein the detection module further comprises a bypass line having one end communicating with the evacuation line, and a second solenoid valve and a second shut-off valve connected to the bypass line in this order in a gas flow direction, wherein an end of the bypass line communicating with the evacuation line is located between the vacuum pump and the VOC detector.

5. The leak detection apparatus as defined in claim 4, wherein said detection assembly further comprises a second muffler connected to an end of said diversion conduit proximate said second shut-off valve.

6. The leak detection apparatus as defined in claim 4, wherein the detection assembly further comprises:

the first pressure gauge is connected between the end part of the flow distribution pipeline communicated with the vacuumizing pipeline and the first electromagnetic valve;

7. The leak detection apparatus as defined in claim 1, wherein an inner surface of the chamber is provided with an insulating coating, and the chamber is provided with a sealing ring at an edge of the opening thereof.

8. The leak detection apparatus as defined in claim 1, further comprising a pressing actuator connected to the cover for driving the cover to be raised and lowered, and a support structure for supporting the pressing actuator.

9. The leak detection device as defined in claim 8, further comprising at least one guide post coupled to the cover, and at least one guide sleeve coupled to the support structure and engaging the guide post.

10. The leak detection apparatus as defined in claim 9, further comprising a pressure sensor coupled to the compression actuator for detecting a pressure between the cover and the chamber, and a position adjustment assembly coupled to the compression actuator for adjusting a planar position of the cover.

11. The apparatus according to claim 10, further comprising a gripping mechanism connected to the position adjustment assembly, wherein the gripping mechanism is used for gripping the battery module from a loading station to the test chamber or gripping the battery module from the test chamber to an unloading station.

12. The apparatus according to claim 11, further comprising a transfer mechanism for transferring the battery module, wherein the transfer mechanism passes through the feeding station and the discharging station.