Battery liquid leakage detection device and equipment thereof

Abstract

The utility model provides a battery liquid leakage detection device and equipment thereof. The battery liquid leakage detection device comprises a rack, a lifting driving piece and a detection assembly. The lifting driving piece is arranged on the rack; the detection assembly comprises an upper cavity template, a lower cavity template and a negative pressure pipe fitting; the power output end of the lifting driving part is connected with the upper cavity template to drive the upper cavity template to move towards the lower cavity template, so that the upper cavity template and the lower cavity template jointly define a detection cavity, and the detection cavity is used for placing a to-be-detected soft package battery; the upper cavity template is respectively provided with a detection extraction opening, an active pressure reduction opening and a natural pressure relief opening, and the detection extraction opening, the active pressure reduction opening and the natural pressure relief opening are all communicated with the detection cavity; and one end, deviating from the detection cavity, of the detection extraction opening is communicated with the detection end of the VOC detector. According to the battery liquid leakage detection device disclosed by the utility model, the liquid leakage detection accuracy of the soft package battery can be effectively improved, and meanwhile, the influence of other gases on the liquid leakage detection accuracy is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery leakage detection technical field, in particular to a kind of battery leakage detection device and its equipment. BACKGROUND

[0002] Soft package battery is the third generation lithium battery developed on the basis of original steel shell, aluminum shell, plastic shell battery, is widely favored by domestic and foreign users with its light, safe performance is good, energy density is high and so on, make soft package battery be widely used in mobile power, digital product and intelligent wear product and many other fields.

[0003] Now, in the actual production process of soft package battery, soft package battery after completing injection liquid packaging often needs to carry out leakage detection, to prevent soft package battery with leakage problem from entering next process, to ensure the sealing property and reliability of soft package battery.In prior art, common leakage detection methods include visual detection method, weight detection method, electrochemical detection method and vacuum detection method etc.;Among them, vacuum detection method is a method based on air tightness detection principle, specifically, battery is placed in vacuum chamber, and pressure change is used to judge whether battery leaks.If battery exists leakage, then in pressure maintaining stage, electrolyte in battery interior will escape and volatilize, to cause the change of pressure in vacuum environment, so as to be detected by pressure sensor.

[0004] However, the above-mentioned vacuum detection method needs to maintain the pressure of battery to be detected in pressure maintaining stage for a long time, and the situation of pressure leakage and gas mixing is easy to occur, which reduces the detection accuracy of leakage. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the deficiencies in prior art, and provides a battery leakage detection device and its equipment, which can simultaneously consider the high leakage detection efficiency and the leakage detection accuracy of soft package battery.

[0006] The utility model aims at overcoming the deficiencies in prior art, and provides a battery leakage detection device and its equipment, which can simultaneously consider the high leakage detection efficiency and the leakage detection accuracy of soft package battery.

[0007] A kind of battery leakage detection device, comprising:

[0008] Frame;

[0009] Lifting driving part, is located on the frame;

[0010] The detection assembly comprises an upper cavity template, a lower cavity template and a negative pressure pipe; a power output end of the lifting drive element is connected with the upper cavity template to drive the upper cavity template to move towards the lower cavity template, so that the upper cavity template and the lower cavity template jointly enclose a detection chamber for placing a soft-pack battery to be detected; the upper cavity template is respectively provided with a detection air outlet, a positive pressure reduction outlet and a natural pressure reduction outlet, which are all in communication with the detection chamber; the detection air outlet is used to be in communication with a detection end of a VOC detector, the positive pressure reduction outlet is used to be in communication with a gas supply end of a dry gas supply machine, and the natural pressure reduction outlet is used to be in communication with external atmospheric pressure.

[0011] One end of the negative pressure pipe is in communication with the detection chamber, and the other end of the negative pressure pipe is used to be in communication with a suction nozzle of a vacuum pump.

[0012] In one of the embodiments, the lower cavity template is provided with a profiled sealing element.

[0013] In one of the embodiments, the negative pressure pipe comprises a gas path adapter and a telescopic air pipe; one end of the gas path adapter is arranged on the upper cavity template and is in communication with the detection chamber, and the other end of the gas path adapter is in communication with one end of the telescopic air pipe, and the other end of the telescopic air pipe is used to be in communication with the suction nozzle of the vacuum pump.

[0014] In one of the embodiments, the upper cavity template is further provided with a cleaning port in communication with the detection chamber, and the cleaning port is used to be in communication with a gas supply end of an air compressor.

[0015] In one of the embodiments, the battery liquid leakage detection device further comprises a transportation platform, the transportation platform is located below the upper cavity template, the lower cavity template is arranged on the transportation platform, and the transportation platform is used to transport the lower cavity template.

[0016] In one of the embodiments, the battery liquid leakage detection device further comprises an elastic assembly, the elastic assembly comprises a connecting plate and an elastic connecting element; a power output end of the lifting drive element is fixedly connected with the connecting plate, one end of the elastic connecting element is connected with the connecting plate, and the other end of the elastic connecting element is connected with the upper cavity template.

[0017] In one of the embodiments, the elastic connecting element comprises a screw fastener and an elastic element; the screw fastener is in sliding connection with the connecting plate, and the screw fastener is fixedly connected with the upper cavity template; the elastic element is elastically sleeved on the screw fastener, and the elastic element is located between the connecting plate and the upper cavity template.

[0018] In one of the embodiments, the battery liquid leakage detection device further comprises a guide assembly, the guide assembly comprises a plurality of guide columns and a plurality of guide sleeves; each of the guide sleeves is fixedly installed on the top of the rack, and each of the guide sleeves is slidingly sleeved on one end of the corresponding guide column, and the other end of each of the guide columns is slidingly connected with the connecting plate.

[0019] In one of the embodiments, the connecting plate is provided with a sliding hole, the screw fastener is penetratingly arranged in the sliding hole and is slidingly connected with the connecting plate; the end of the screw fastener, which is away from the upper cavity template, is provided with a limiting portion, and the limiting portion is used for abutting and limiting the side of the connecting plate, which is away from the upper cavity template.

[0020] A battery liquid leakage detection device comprises a VOC detector, a blister tray, an automatic feeding machine and the battery liquid leakage detection device of any one of the above embodiments, the blister tray is used for placing a plurality of the soft battery to be detected at the same time, and the automatic feeding machine places the soft battery to be detected of the blister tray on the lower cavity template.

[0021] Compared with the prior art, the battery liquid leakage detection device has at least the following advantages:

[0022] In the liquid leakage detection, since the other end of the negative pressure pipe is connected with the air suction nozzle of the vacuum pump, the vacuum pump performs negative pressure suction on the gas in the detection chamber, so that the detection chamber forms a vacuum negative pressure state; then the dry gas supply machine rapidly supplies dry gas to the detection chamber through the active pressure reduction port and maintains the pressure, and then a small amount of gas in the detection chamber is sucked to the detection end of the VOC detector through the detection air suction port for accurate detection, so that the liquid leakage detection accuracy of the soft battery is effectively improved, and the influence of other gases on the liquid leakage detection accuracy is avoided; finally, the natural pressure relief port is opened, so that the detection chamber returns to the room pressure, and the soft battery after detection is taken out. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment, should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0024] Figure 1 It is a structural schematic view of the battery liquid leakage detection device in an embodiment;

[0025] Figure 2 It is a structural schematic view of the battery liquid leakage detection device in an embodiment; Figure 1 It is a front view of the battery liquid leakage detection device shown in the figure;

[0026] Figure 3 for Figure 2 A partial enlarged view of point A on the battery leakage detection device shown;

[0027] Figure 4 for Figure 1 A partial structural schematic diagram of the battery leakage detection device shown.

[0028] Figure 5 for Figure 1 Cross-sectional view of the upper and lower cavity templates of the battery leakage detection device shown;

[0029] Reference numerals: Battery leakage detection device 10; Frame 100; Lifting drive component 200; Detection component 300; Upper cavity template 310; Detection air extraction port 3101; Active pressure reduction port 3102; Natural pressure relief port 3103; Cleaning port 3104; Detection chamber 301; Lower cavity template 320; Contouring seal 3210; Negative pressure fitting 330; Air circuit adapter 3310; Telescopic air pipe 3320; Transport platform 400; Elastic component 500; Connecting plate 510; Sliding hole 5101; Elastic connector 520; Screw fastener 5210; Limiting part 5212; Elastic component 5220; Guide component 600; Guide column 610; Guide sleeve 620. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] The battery liquid leakage detection device provided by the present disclosure comprises a rack, a lifting driving element and a detection assembly. The lifting driving element is arranged on the rack. The detection assembly comprises an upper cavity template, a lower cavity template and a negative pressure pipe element. The power output end of the lifting driving element is connected with the upper cavity template to drive the upper cavity template to move towards the lower cavity template, so that the upper cavity template and the lower cavity template jointly enclose a detection chamber for placing a soft-pack battery to be detected. The upper cavity template is respectively provided with a detection air suction port, a positive pressure reduction port and a natural pressure relief port, which are all in communication with the detection chamber. The detection air suction port is connected with the detection end of a VOC detector, the positive pressure reduction port is connected with the gas supply end of a dry gas supply machine, and the natural pressure relief port is connected with the external atmospheric pressure. One end of the negative pressure pipe element is connected with the detection chamber, and the other end of the negative pressure pipe element is connected with the air suction nozzle of a vacuum pump.

[0034] For better understanding of the battery liquid leakage detection device 10 of the present disclosure, the battery liquid leakage detection device 10 is further explained as follows: Figures 1 to 5

[0035] The battery liquid leakage detection device 10 of one embodiment comprises a rack 100, a lifting driving element 200 and a detection assembly 300. The lifting driving element 200 is arranged on the rack 100. The detection assembly 300 comprises an upper cavity template 310, a lower cavity template 320 and a negative pressure pipe element 330. The power output end of the lifting driving element 200 is connected with the upper cavity template 310 to drive the upper cavity template 310 to move towards the lower cavity template 320, so that the upper cavity template 310 and the lower cavity template 320 jointly enclose a detection chamber 301 for placing a soft-pack battery to be detected. The upper cavity template 310 is respectively provided with a detection air suction port 3101, a positive pressure reduction port 3102 and a natural pressure relief port 3103, which are all in communication with the detection chamber 301. The detection air suction port 3101 is connected with the detection end of a VOC detector, the positive pressure reduction port 3102 is connected with the gas supply end of a dry gas supply machine, and the natural pressure relief port 3103 is connected with the external atmospheric pressure. One end of the negative pressure pipe element 330 is connected with the detection chamber 301, and the other end of the negative pressure pipe element 330 is connected with the air suction nozzle of a vacuum pump.

[0036] ​In the embodiment, when liquid leakage is detected, the other end of the negative pressure pipe 330 is connected to the suction nozzle of the vacuum pump, the vacuum pump performs negative pressure suction on the gas in the detection chamber 301, so that the detection chamber 301 forms a vacuum negative pressure state; then the dry gas supply machine quickly supplies dry gas to the detection chamber 301 through the active pressure reduction port 3102 and maintains the pressure, and then a small amount of gas in the detection chamber 301 is sucked to the detection end of the VOC detector for accurate detection, so as to effectively improve the liquid leakage detection accuracy of the soft pack battery and avoid the influence of other gases on the liquid leakage detection accuracy; finally, the natural pressure relief port 3103 is opened, so that the detection chamber 301 returns to the room pressure, and the soft pack battery after detection is taken out.

[0037] It should be noted that in the embodiment, the upper cavity template 310 is designed as a groove, that is, when the power output end of the lifting driving part 200 drives the upper cavity template 310 to move towards the lower cavity template 320, the upper cavity template 310 and the lower cavity template 320 abut each other to form a sealed detection chamber 301. In other embodiments, the lower cavity template 320 is designed as a groove, or both the upper cavity template 310 and the lower cavity template 320 are designed as grooves, which can also make the upper cavity template 310 and the lower cavity template 320 abut each other to form a sealed detection chamber 301.

[0038] As shown in Figure 1 , Figure 4 and Figure 5 , in one of the embodiments, the lower cavity template 320 is provided with a profiled sealing element 3210. In this way, when the power output end of the lifting driving part 200 drives the upper cavity template 310 to move towards the lower cavity template 320, the upper cavity template 310 and the lower cavity template 320 abut each other and press the profiled sealing element 3210, which can effectively improve the air tightness of the detection chamber 301 and avoid the situation of air pressure leakage, thereby effectively improving the liquid leakage detection accuracy and liquid leakage detection rate of the soft pack battery.

[0039] As shown in Figure 1 and Figure 4 , in one of the embodiments, the negative pressure pipe 330 includes a gas path adapter 3310 and a telescopic air pipe 3320; one end of the gas path adapter 3310 is arranged on the upper cavity template 310 and is connected to the detection chamber 301, the other end of the gas path adapter 3310 is connected to one end of the telescopic air pipe 3320, and the other end of the telescopic air pipe 3320 is used to be connected to the suction nozzle of the vacuum pump.

[0040] It can be understood that, in the embodiment, since one end of the air path adapter 3310 is arranged on the upper cavity template 310, and the upper cavity template 310 is driven to move towards or away from the lower cavity template 320 by the power output end of the lifting driving member 200, the one end of the air path adapter 3310 and the telescopic air pipe 3320 will move up and down with the upper cavity template 310. Therefore, by adopting the mode that the telescopic air pipe 3320 is connected with the air path adapter 3310, the stability of the air path connection between the two can be better ensured, and the situation that the connection is loose or falls off can be avoided.

[0041] As shown in Figure 4 and Figure 5 In one of the embodiments, the upper cavity template 310 is also provided with a cleaning port 3104 which is in communication with the detection chamber 301, and the cleaning port 3104 is used to communicate with the air supply end of the air compressor.

[0042] It can be understood that, after the VOC detector detects that the soft package battery of the previous batch has a liquid leakage problem, the soft package battery of the next batch can be cleaned by the cleaning port 3104 before entering the detection chamber 301, so as to effectively clean the gas volatilized by the liquid leakage of the soft package battery of the previous batch, thereby avoiding the interference of the above-mentioned volatilized gas on the detection accuracy of the soft package battery of the next batch, and further improving the detection accuracy.

[0043] It should be further pointed out that, in the embodiment, the detection air outlet 3101, the active pressure reduction port 3102, the natural pressure relief port 3103 and the cleaning port 3104 are all fixedly installed with elbow adapters, the corresponding air pipes are connected through the elbow adapters, and the corresponding working components are connected through the air pipes; wherein, the electromagnetic valve for controlling the on-off of the air path is arranged between each air pipe and the corresponding working component, and is connected to the PLC control system, so as to realize the cooperative work between the detection air outlet 3101, the active pressure reduction port 3102, the natural pressure relief port 3103 and the cleaning port 3104.

[0044] In addition, the working principle of the VOC detector belongs to the prior art, and will not be described here.

[0045] As shown in Figure 2 and Figure 4 In one of the embodiments, the battery liquid leakage detection device 10 further comprises a transportation platform 400, the transportation platform 400 is located below the upper cavity template 310, the lower cavity template 320 is arranged on the transportation platform 400, and the transportation platform 400 is used to transport the lower cavity template 320.

[0046] It can be understood that the reciprocating movement of the lower cavity template 320 is realized by the transportation platform 400, that is, the soft package battery to be detected is placed on the lower cavity template 320, the lower cavity template 320 is driven by the transportation platform 400 to move to the lower side of the upper cavity template 310, and the upper cavity template 310 and the lower cavity template 320 are abutted and closed, and the liquid leakage detection is performed. When the liquid leakage detection is completed, the upper cavity template 310 and the lower cavity template 320 are in an open state, the lower cavity template 320 is driven by the transportation platform 400 to move away from the lower side of the upper cavity template 310, so as to unload the soft package battery of the previous batch and load the soft package battery to be detected of the next batch, so that the battery liquid leakage detection device 10 can better realize the automatic liquid leakage detection application, and the liquid leakage detection efficiency of the soft package battery is effectively improved.

[0047] It should be noted that the transportation platform 400 is a prior art, and in the embodiment, the transportation platform 400 can be a transportation sliding rail structure, which will not be described here.

[0048] As shown in Figures 2 to 5 In one embodiment, the battery liquid leakage detection device 10 further comprises an elastic assembly 500, the elastic assembly 500 comprises a connecting plate 510 and an elastic connecting piece 520; the power output end of the lifting driving part 200 is fixedly connected with the connecting plate 510, one end of the elastic connecting piece 520 is connected with the connecting plate 510, and the other end of the elastic connecting piece 520 is connected with the upper cavity template 310.

[0049] It can be understood that the upper cavity template 310 and the connecting plate 510 are connected through the elastic connecting piece 520, so that when the power output end of the lifting driving part 200 drives the connecting plate 510 to move towards the lower cavity template 320, the upper cavity template 310 can also be driven to move towards the lower cavity template 320, so as to achieve elastic abutment, thereby facilitating to improve the position accuracy of the abutment between the upper cavity template 310 and the lower cavity template 320. In the embodiment, the number of the elastic connecting pieces 520 is multiple, and the multiple elastic connecting pieces 520 are uniformly distributed between the upper cavity template 310 and the connecting plate 510.

[0050] As shown in Figures 3 to 5As shown in the drawings, in one of the embodiments, the elastic connecting piece 520 comprises a screw fastener 5210 and an elastic piece 5220; the screw fastener 5210 is in sliding connection with the connecting plate 510, and the other end of the screw fastener 5210 is in fixed connection with the upper cavity template 310; the elastic piece 5220 is elastically sleeved on the screw fastener 5210, and the elastic piece 5220 is located between the connecting plate 510 and the upper cavity template 310. In one of the embodiments, the battery liquid leakage detection device 10 further comprises a guide assembly 600, and the guide assembly 600 comprises a plurality of guide columns 610 and a plurality of guide sleeves 620; each guide sleeve 620 is fixedly installed on the top of the rack 100, and each guide sleeve 620 is slidingly sleeved on one end of the corresponding guide column 610; the other end of each guide column 610 is in sliding connection with the connecting plate 510.

[0051] It can be understood that, in the embodiment, the elastic piece 5220 is elastically sleeved on the screw fastener 5210, so that the screw fastener 5210 is arranged to limit the elastic piece 5220, thereby realizing the elastic connection between the connecting plate 510 and the upper cavity template 310, so that the upper cavity template 310 and the lower cavity template 320 have the function of automatic deviation correction when abutting against each other; further, the plurality of guide columns 610 and the corresponding guide sleeves 620 are slidingly matched, and the other end of the guide column 610 is in sliding connection with the connecting plate 510, thereby effectively improving the stability of the lifting movement of the connecting plate 510, so as to improve the positional accuracy of the abutment between the upper cavity template 310 and the lower cavity template 320, and ensure the air tightness of the detection chamber 301.

[0052] As shown in the drawings, Figure 3 and Figure 4 As shown in the drawings, in one of the embodiments, the connecting plate 510 is provided with a sliding hole 5101, the screw fastener 5210 is arranged in the sliding hole 5101 and in sliding connection with the connecting plate 510; the end of the screw fastener 5210 away from the upper cavity template 310 is provided with a limiting portion 5212, and the limiting portion 5212 is used to abuttingly limit the side of the connecting plate 510 away from the upper cavity template 210.

[0053] It can be understood that, in the embodiment, the limiting portion 5212 abuttingly limits the side of the connecting plate 510 away from the upper cavity template 210, and the elastic piece 5220 is limited between the connecting plate 510 and the upper cavity template 310, so that the connecting plate 510 and the upper cavity template 310 are elastically connected, thereby making the upper cavity template 310 and the lower cavity template 320 have the function of automatic deviation correction when abutting against each other, so as to improve the positional accuracy of the abutment between the upper cavity template 310 and the lower cavity template 320, and ensure the air tightness of the detection chamber 301.

[0054] It should be further noted that in the present embodiment, the battery liquid leakage detection device 10 adopts a double-station structure design, that is, the number of detection assemblies 300 is two, and the liquid leakage detection is performed simultaneously by the two detection assemblies 300, thereby significantly improving the liquid leakage detection efficiency of the soft package battery.

[0055] A battery liquid leakage detection device, comprising a VOC detector, a blister tray, an automatic feeding machine, and the battery liquid leakage detection device 10 of any one of the above embodiments, wherein the blister tray is used to simultaneously place a plurality of soft package batteries to be detected, and the automatic feeding machine is used to place the soft package batteries to be detected on the lower cavity template 320.

[0056] In the present embodiment, by simultaneously placing a plurality of soft package batteries to be detected on the blister tray, and then using the automatic feeding machine to position and place the blister tray on the lower cavity template 320, batch liquid leakage detection of the soft package batteries to be detected can be performed, thereby better improving the liquid leakage detection efficiency of the soft package battery, and at the same time, the battery liquid leakage detection device can better adapt to the automatic liquid leakage detection application.

[0057] The working principle of the battery liquid leakage detection equipment is as follows: the automatic feeding machine positions the suction disc on which a plurality of soft package batteries to be detected are placed on the lower cavity template 320, and moves the lower cavity template 320 to the lower side of the upper cavity template 310 through the conveying platform 400; the lifting driving part 200 drives the upper cavity template 310 to move downward and abut against the lower cavity template 320, so that the plurality of soft package batteries to be detected are placed in the detection chamber 301; the vacuum pump is started to perform negative pressure suction on the detection chamber 301 until a target negative pressure value, and then the vacuum pump stops suction; the dry gas supply machine is started to supply dry gas into the detection chamber 301 until a target positive pressure value, and then the dry gas supply machine stops working, and then the detection chamber 301 is pressure maintained for 3-5 seconds; after the pressure maintaining is completed, the detection exhaust port 3101 is opened to suck a small amount of gas in the detection chamber 301 to the detection end of the VOC detector for accurate detection, if there is a liquid leakage problem of the soft package battery in the detection chamber 301, the soft package battery leakage detection result of this batch is unqualified, then the natural pressure relief port 3103 is opened to restore the chamber pressure of the detection chamber 301, the lifting driving part 200 drives the upper cavity template 310 to move upward to open the detection chamber 301, the conveying platform 400 moves the lower cavity template 320 away from the lower side of the upper cavity template 310, and the unqualified soft package battery of this batch is taken out, then the lower cavity template 320 is reset, the lifting driving part 200 drives the upper cavity template 310 to abut against and close the lower cavity template 320 again to form the detection chamber 301, the air compressor is started, and the natural pressure relief port 3103 is opened, and the cleaning gas is supplied into the empty detection chamber 301 through the cleaning port 3104 to perform cleaning operation; after the cleaning operation is completed, the lifting driving part 200 drives the upper cavity template 310 to move to open the detection chamber 301. It should be noted that if there is no liquid leakage problem of the soft package battery in the detection chamber 301, the detection chamber 301 does not need to be cleaned, and the qualified soft package battery is directly taken out after the lower cavity template 320 is removed.

[0058] Compared with the prior art, the utility model has at least the following advantages:

[0059] In the liquid leakage detection, the other end of the negative pressure pipe is connected with the air suction nozzle of the vacuum pump, the vacuum pump performs negative pressure suction on the gas in the detection chamber, so that the detection chamber forms a vacuum negative pressure state; then the dry gas supply machine rapidly supplies dry gas into the detection chamber through the active pressure relief port and maintains the pressure, and then a small amount of gas in the detection chamber is sucked to the detection end of the VOC detector through the detection exhaust port for accurate detection, so as to effectively improve the liquid leakage detection accuracy of the soft package battery and avoid the influence of other gases on the liquid leakage detection accuracy; finally, the natural pressure relief port is opened to restore the chamber pressure of the detection chamber, and the soft package battery after detection is taken out.

[0060] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A battery liquid leakage detection device characterized by comprising: The battery liquid leakage detection device comprises a rack, a lifting driving element arranged on the rack, a detection assembly comprising an upper cavity template, a lower cavity template and a negative pressure pipe element, a power output end of the lifting driving element being connected with the upper cavity template to drive the upper cavity template to move towards the lower cavity template, so that the upper cavity template and the lower cavity template jointly enclose a detection chamber for placing a soft-pack battery to be detected, the upper cavity template being provided with a detection air outlet, a positive pressure reduction outlet and a natural pressure reduction outlet, the detection air outlet, the positive pressure reduction outlet and the natural pressure reduction outlet being in communication with the detection chamber, the detection air outlet being in communication with a detection end of a VOC detector, the positive pressure reduction outlet being in communication with a gas supply end of a dry gas supply machine, and the natural pressure reduction outlet being in communication with external atmospheric pressure, one end of the negative pressure pipe element being in communication with the detection chamber, and the other end of the negative pressure pipe element being in communication with a suction nozzle of a vacuum pump. The lower cavity template is provided with a profiled sealing element. The negative pressure pipe element comprises an air path adapter and an extendable air pipe, one end of the air path adapter being arranged on the upper cavity template and being in communication with the detection chamber, the other end of the air path adapter being in communication with one end of the extendable air pipe, and the other end of the extendable air pipe being in communication with the suction nozzle of the vacuum pump. The upper cavity template is further provided with a cleaning port in communication with the detection chamber, the cleaning port being in communication with a gas supply end of an air compressor. The battery liquid leakage detection device further comprises a transportation platform, the transportation platform being located below the upper cavity template, the lower cavity template being arranged on the transportation platform, and the transportation platform being used for transporting the lower cavity template. The battery liquid leakage detection device further comprises an elastic assembly, the elastic assembly comprising a connecting plate and an elastic connecting element, a power output end of the lifting driving element being fixedly connected with the connecting plate, one end of the elastic connecting element being connected with the connecting plate, and the other end of the elastic connecting element being connected with the upper cavity template.

2. The battery liquid leakage detection device according to claim 1, characterized by The elastic connecting element comprises a screw fastener and an elastic element, the screw fastener being slidingly connected with the connecting plate and being fixedly connected with the upper cavity template, and the elastic element being elastically sleeved on the screw fastener and being located between the connecting plate and the upper cavity template.

3. The battery liquid leakage detection device according to claim 1, characterized by The battery liquid leakage detection device further comprises a guide assembly, the guide assembly comprising a plurality of guide columns and a plurality of guide sleeves, each guide sleeve being fixedly installed on the top of the rack and being slidingly sleeved on one end of a corresponding guide column, and the other end of each guide column being slidingly connected with the connecting plate.

4. The battery liquid leakage detection device according to claim 1, characterized by The connecting plate is provided with a sliding hole, the screw fastener being arranged in the sliding hole and being slidingly connected with the connecting plate, and the end of the screw fastener away from the upper cavity template being provided with a limiting portion for abutting and limiting the side of the connecting plate away from the upper cavity template.

5. The battery liquid leakage detection device according to claim 1, characterized by ​ 6. The battery liquid leakage detection device according to claim 1, characterized by ​ 7. The battery liquid leakage detection device according to claim 6, characterized by ​ 8. The battery liquid leakage detection device according to claim 6, characterized by ​ 9. The battery leakage detection apparatus of claim 7, wherein ​ 10. A battery liquid leakage detection apparatus characterized by comprising: The battery liquid leakage detection device comprises a VOC detector, a blister tray, an automatic feeding machine, and the battery liquid leakage detection device according to any one of claims 1-9, wherein the blister tray is used for placing a plurality of the soft battery to be detected, and the automatic feeding machine is used for placing the soft battery to be detected of the blister tray on the lower cavity template.

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