Device for detecting full welding sealing performance of blade battery top cover

Abstract

The utility model provides a device for detecting blade battery top cover full welding sealing performance, comprising a plurality of detection box bodies, the detection box bodies are provided with a plurality of sealed sealing cavities used for independently accommodating batteries to be detected, each sealed sealing cavity is correspondingly provided with a helium detection module, and the helium detection modules are connected with the detection box bodies. The helium detection module can vacuumize the corresponding sealed cavity and inject helium into the corresponding to-be-detected battery; the vacuumizing assembly comprises a plurality of vacuumizing mechanisms used for vacuumizing the sealed cavity; the helium detection assembly comprises a plurality of helium detectors used for carrying out leak detection on the to-be-detected battery; and each sealed cavity is connected with each vacuumizing mechanism and each helium detector. According to the utility model, vacuumizing detection and helium detection are carried out, unqualified cells can be rapidly identified, the stability of product quality is ensured, the detection process is fast, and the overall detection efficiency of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a device for detecting the full welding sealing performance of a blade battery top cover. Background Art

[0002] Blade batteries, as a lithium-ion battery made of lithium iron phosphate material, have their own unique shape and design features, such as being directly embedded in the battery pack, eliminating the traditional battery module, and improving the energy density and structural strength of the battery pack. However, for any battery, ensuring its good sealing is crucial because it is directly related to the safety and performance of the battery. However, the existing blade battery sealing detection equipment has the following problems:

[0003] 1. After the problem battery is found, the equipment needs to be purged with helium, which has a great impact on the equipment detection efficiency, making the overall sealing detection work line inefficient.

[0004] 2. Multiple batteries are sealed together, and re-inspection requires the batteries to be placed in a temporary storage location and then inspected one by one, which is a cumbersome procedure. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a device for detecting the full welding sealing of the top cover of the blade battery, including vacuum detection and helium test detection, so as to quickly identify unqualified batteries, ensure the stability of product quality, speed up the detection process, and improve the overall detection efficiency of the equipment.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] A device for detecting the full welding sealing of a blade battery top cover, comprising:

[0008] A plurality of test boxes, each of which is provided with a plurality of sealed cavities for individually accommodating the test battery, each of which is provided with a corresponding helium detection module, which can evacuate the test battery in the corresponding sealed cavity and inject helium;

[0009] A vacuum pumping assembly, comprising a plurality of vacuum pumping mechanisms for vacuuming the sealed cavity;

[0010] A helium testing component, comprising a plurality of helium detectors for leak testing the battery to be tested;

[0011] Each of the sealed cavities is connected to each of the vacuum pumping mechanisms and each of the helium detectors.

[0012] Furthermore, the vacuum pumping assembly includes two vacuum pumping mechanisms, each of which is connected to all the sealed cavities of each detection box;

[0013] The helium testing assembly comprises two helium detectors, and each of the helium detectors is communicated with all the sealed cavities of each of the testing boxes.

[0014] Furthermore, each of the helium detectors is connected to a plurality of the sealed cavities via a first conduit, and each of the sealed cavities is correspondingly provided with a first switch valve to control the opening and closing of the first conduit;

[0015] Each of the vacuum pumping mechanisms is connected to a plurality of the sealed cavities via a second conduit, and each of the sealed cavities is correspondingly provided with a second switch valve to control the opening and closing of the second conduit.

[0016] Furthermore, the detection box comprises an upper cavity module and a lower cavity module, and the lower cavity module cooperates closely with the upper cavity module to form a plurality of sealed cavities for individually accommodating the batteries to be tested.

[0017] Further, a plurality of the lower chamber modules are arranged on a longitudinal conveying assembly, a plurality of the upper chamber modules are fixed on a bracket, and the longitudinal conveying assembly is arranged below the bracket;

[0018] The longitudinal conveying assembly drives the lower chamber module to move forward and backward to correspond to the position of the upper chamber module, wherein a lifting mechanism is provided at the bottom of the lower chamber module, and the lifting mechanism is used to lift the lower chamber module so that it cooperates with the upper chamber module to seal.

[0019] A method for detecting full welding seal of a blade battery top cover, the method comprising the following steps:

[0020] Step S1: placing the battery to be tested in a test box, and evacuating several sealed cavities in the test box to a specified pressure through a vacuum assembly;

[0021] Step S2: judging whether there are any batteries that fail the first round according to the vacuum pumping component, if yes, executing step S3, if no, executing step S4;

[0022] Step S3: vacuumizing each sealed cavity one by one to a specified pressure through the vacuuming assembly, screening out the first round of unqualified batteries, and obtaining the first round of qualified batteries;

[0023] Step S4: The corresponding first round qualified batteries are evacuated to a specified pressure through each helium detection module and then helium is injected, and each of the sealed cavities is connected to the helium detection assembly through the first pipeline for detection;

[0024] Step S5: judging whether there are any unqualified batteries in the second round according to the helium testing component, if yes, executing step S6, if no, outputting the final qualified batteries;

[0025] Step S6: exhaust each of the first-round qualified batteries in the test box one by one through the helium detection module, evacuate the vacuum to the specified pressure, and then inject helium. The helium detection component re-checks the helium in each of the sealed cavities one by one to screen out the second-round unqualified batteries and obtain the final qualified batteries.

[0026] Furthermore, in step S2, if it is determined that there are batteries that failed the first round, step S3 is executed, and at the same time, another vacuum pumping component, another helium testing component and the helium testing module of the next testing box judge the next testing box with the battery to be tested according to steps S1-S6.

[0027] Furthermore, in step S5, if it is determined that there are batteries that fail the second round, step S6 is executed. At the same time, another vacuum pumping component, another helium testing component and the helium testing module of the next testing box judge the next testing box with the battery to be tested according to steps S1-S6.

[0028] Furthermore, in step S2, the vacuum pumping component determines whether there are any batteries that fail the first round according to the pressure difference between the inside and outside of the battery to be tested.

[0029] Furthermore, in step S5, the helium testing component determines whether there are any failed batteries in the second round according to whether there is helium leakage outside the battery to be tested.

[0030] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0031] The utility model is provided with a vacuum pumping component and a helium testing component to perform batch sealing testing on a plurality of batteries accommodated in a testing box. If unqualified batteries exist, they can be re-tested one by one. Meanwhile, another vacuum pumping component and a helium testing component can be started to perform batch sealing testing on the next batch of batteries accommodated in the testing box.

[0032] The sealing test includes vacuum test and helium test, which can quickly identify unqualified batteries, ensure the stability of product quality, speed up the testing process, and improve the overall testing efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic top view of the structure of a device for detecting the full welding sealing of a blade battery top cover provided in Example 1 of the utility model;

[0035] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0036] Figure 3 for Figure 2 A local enlarged structural diagram of the part;

[0037] Figure 4 It is a three-dimensional structural schematic diagram of the detection box in the utility model;

[0038] Figure 5 This is a schematic diagram of the exploded structure of the detection box in the utility model;

[0039] Figure 6 It is a structural schematic diagram of the detection box in the utility model.

[0040] Icons: 1. Detection box; 2. Vacuum extraction component; 3. Helium detection component; 4. Helium detection module; 5. Bracket; 6. Longitudinal conveying component; 7. Lifting mechanism; 8. Sealing cavity position; 9. Second conduit; 10. First placement rack; 11. Upper cavity module; 12. Lower cavity module; 13. Second placement rack; 14. Clamping fixture; 15. First conduit. DETAILED DESCRIPTION

[0041] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0044] Example 1

[0045] Please refer to Figures 1 to 6 , a device for detecting the full welding sealing of the top cover of a blade battery, comprising:

[0046] A plurality of test boxes 1, each of which is provided with a plurality of sealed cavities for individually accommodating the test battery, each of which is provided with a corresponding helium detection module 4, which can evacuate the test battery in the corresponding sealed cavity and inject helium;

[0047] The vacuum pumping assembly 2 includes a plurality of vacuum pumping mechanisms for vacuuming the sealed cavity;

[0048] The helium testing component 3 includes a plurality of helium detectors for leak testing the battery to be tested;

[0049] Each sealed cavity is connected to each vacuum pumping mechanism and each helium detector.

[0050] Furthermore, the vacuum pumping assembly 2 includes two vacuum pumping mechanisms, each of which is connected to all the sealed cavities of each detection box 1;

[0051] The helium testing assembly comprises two helium detectors, each of which is connected to all the sealed cavities of each testing box 1.

[0052] Furthermore, each helium detector is connected to a plurality of sealed cavities through a first conduit 15, and each sealed cavity is correspondingly provided with a first switch valve to control the opening and closing of the first conduit 15;

[0053] Each vacuum pumping mechanism is connected to a plurality of sealed cavities via a second conduit 9 , and each sealed cavity is correspondingly provided with a second switch valve to control the opening and closing of the second conduit 9 .

[0054] Furthermore, the detection box 1 comprises an upper cavity module 11 and a lower cavity module 12 , and the lower cavity module 12 and the upper cavity module 11 cooperate closely to form a plurality of sealed cavities for individually accommodating batteries to be tested.

[0055] Further, a plurality of lower chamber modules 12 are disposed on the longitudinal conveying assembly 6, a plurality of upper chamber modules 11 are fixed on the bracket 5, and the longitudinal conveying assembly 6 is disposed below the bracket 5;

[0056] The longitudinal conveying assembly 6 drives the lower chamber module 12 to move forward and backward to correspond to the position of the upper chamber module 11, wherein a lifting mechanism 7 is provided at the bottom of the lower chamber module 12, and the lifting mechanism 7 is used to lift the lower chamber module 12 so that it cooperates with the upper chamber module 11 to seal.

[0057] like Figure 1 As shown, a first placement rack 10 is provided on the left side of the longitudinal conveying assembly 6, i.e., near the vacuum assembly 2, for placing unqualified batteries grasped by the robot, and a second placement rack 13 is provided on the right side of the longitudinal conveying assembly 6, for placing qualified batteries grasped by the robot, so as to facilitate the next process. Figure 3As shown, the lower chamber module 12 is provided with a plurality of clamping fixtures 14, which are used to fix the battery to be tested to prevent the battery to be tested from being deflected or damaged by collision. Accordingly, each sealed cavity corresponds to a clamping fixture 14.

[0058] A method for detecting the full welding seal of a blade battery top cover, the method comprising the following steps:

[0059] Step S1: placing the battery to be tested in the testing box 1, and evacuating several sealed cavities in the testing box 1 to a specified pressure through the vacuum assembly 2;

[0060] Step S2: judging whether there are any batteries that fail the first round according to the vacuum pumping component 2, if yes, executing step S3, if no, executing step S4;

[0061] Step S3: vacuumizing each sealed cavity one by one to a specified pressure through the vacuuming component 2, screening out the first round of unqualified batteries, and obtaining the first round of qualified batteries;

[0062] Step S4: The corresponding first round qualified batteries are evacuated to a specified pressure through each helium detection module 4 and then helium is injected, and each sealed cavity is connected to the helium detection component 3 through the first pipeline for detection;

[0063] Step S5: judging whether there are any unqualified batteries in the second round according to the helium testing component 3, if yes, executing step S6, if no, outputting the final qualified batteries;

[0064] Step S6: Each first-round qualified battery in the test box 1 is exhausted one by one by the helium test module 4 and evacuated to a specified pressure and then helium is injected. The helium test component 3 re-tests the helium in each sealed cavity one by one to screen out the second-round unqualified batteries and obtain the final qualified batteries.

[0065] Furthermore, in step S2, if it is determined that there are batteries that failed the first round, step S3 is executed, and at the same time, another vacuum pumping component 2, another helium testing component 3, and the helium testing module 4 of the next testing box 1 make a judgment according to steps S1-S6 on the next testing box 1 with the battery to be tested. Preferably, each sealed cavity can be vacuumed before executing step S6.

[0066] Furthermore, in step S5, if it is determined that there are batteries that fail the second round, step S6 is executed. At the same time, another vacuum pumping component 2, another helium testing component 3 and the helium testing module 4 of the next testing box 1 judge the next testing box 1 with the battery to be tested according to steps S1-S6.

[0067] Furthermore, in step S2, the vacuum assembly 2 determines whether there are any batteries that fail the first round according to the pressure difference between the inside and outside of the battery to be tested.

[0068] Furthermore, in step S5, the helium testing component 3 determines whether there are any failed batteries in the second round according to whether there is helium leakage outside the battery to be tested.

[0069] The vacuum pumping mechanism of the utility model can be selected as a vacuum pump. Specifically, in the present embodiment, each vacuum pumping mechanism can be selected to be composed of a large vacuum pump and a small vacuum pump. The large vacuum pump is used to evacuate the sealed cavity, and the small vacuum pump can be used to evacuate the battery. Among them, through the pipeline arrangement, all the second switch valves can be opened, and multiple sealed cavities are connected to the second conduit 9. The vacuum pumping mechanism can evacuate multiple sealed cavities in a single detection box 1 to a specified pressure (such as any value selected from 30 to 100 Pa) at the same time in step S1. That is, in the present embodiment, the second switch valve on the second conduit 9 controls the opening and closing of a single sealed cavity, and can also check a single sealed cavity one by one. The pumping speed of the large vacuum pump is ≥60m 3 / h, ultimate vacuum degree ≤5Pa; small vacuum pump is used for battery vacuuming, pumping speed ≥15m 3 / h, the ultimate vacuum degree ≤5Pa; the above data is for reference only. The helium detection module 4 can select a helium injection cylinder, and each helium detection module 4 can simultaneously evacuate the corresponding battery to be tested in the opened sealed cavity to a specified pressure, and the relative pressure can be selected as -80Kpa. Specifically, the helium detection module 4 can also be provided with a corresponding solenoid valve to control its opening and closing. The helium detection module 4 can also inject helium into the corresponding battery to be tested. The helium detector can detect whether there is helium leakage in the multiple sealed cavities in a single detection box 1 through the first conduit 15, so as to determine whether there are unqualified battery products. Similarly, that is, in this embodiment, the opening and closing of a single sealed cavity is controlled by the first switch valve on the first conduit 15, and a single sealed cavity can be inspected one by one, which is similar to the above-mentioned vacuuming. All the first switch valves can also be opened, and multiple sealed cavities are connected to the first conduit 15. Due to the attachment of the first conduit 15 in the device Figure 1 On the inside, so Figure 2 One end of the first conduit 15 can be shown, as Figure 4 The hole on the top of the middle detection box 1 is a connection hole for connecting the first conduit 15, and the first conduit 15 is connected to the connection hole to communicate with the sealing cavity. Figure 6 The dotted line frame is the sealing cavity position 8. The helium detection module 4 may include a helium injection cylinder, a helium injection nozzle, an M5 connector, and the like.

[0070] The longitudinal conveying component can be a linear motor module, etc. The sliding end of the linear motor module moves back and forth in the direction of the bracket, driving the lower chamber module 12 to seal with the upper chamber module 11 to meet the horizontal position adjustment requirements. The lifting mechanism 7 can be a cylinder, and the telescopic end of the cylinder drives the lower chamber module 12 up and down to meet the vertical height position adjustment requirements.

[0071] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A device for detecting the full welding sealing of the top cover of a blade battery, characterized in that: include: A plurality of test boxes, each of which is provided with a plurality of sealed cavities for individually accommodating the test battery, each of which is provided with a corresponding helium detection module, which can evacuate the test battery in the corresponding sealed cavity and inject helium; A vacuum pumping assembly, comprising a plurality of vacuum pumping mechanisms for vacuuming the sealed cavity; A helium testing component, comprising a plurality of helium detectors for leak testing the battery to be tested; Each of the sealed cavities is connected to each of the vacuum pumping mechanisms and each of the helium detectors.

2. The device for detecting the full welding sealing of the blade battery top cover according to claim 1 is characterized in that: The vacuum pumping assembly includes two vacuum pumping mechanisms, each of which is connected to all the sealed cavities of each detection box; The helium testing assembly comprises two helium detectors, and each of the helium detectors is communicated with all the sealed cavities of each of the testing boxes.

3. The device for detecting the full welding sealing of the blade battery top cover according to claim 1 is characterized in that: Each of the helium detectors is connected to a plurality of the sealed cavities via a first conduit, and each of the sealed cavities is correspondingly provided with a first switch valve to control the opening and closing of the first conduit; Each of the vacuum pumping mechanisms is connected to a plurality of the sealed cavities via a second conduit, and each of the sealed cavities is correspondingly provided with a second switch valve to control the opening and closing of the second conduit.

4. The device for detecting the full welding sealing of the blade battery top cover according to claim 1 is characterized in that: The detection box comprises an upper cavity module and a lower cavity module, wherein the lower cavity module and the upper cavity module cooperate closely to form a plurality of sealed cavities for individually accommodating the batteries to be tested.

5. The device for detecting the full welding sealing of the blade battery top cover according to claim 4 is characterized in that: A plurality of the lower chamber modules are arranged on a longitudinal conveying assembly, a plurality of the upper chamber modules are fixed on a bracket, and the longitudinal conveying assembly is arranged below the bracket; The longitudinal conveying assembly drives the lower chamber module to move forward and backward to correspond to the position of the upper chamber module, wherein a lifting mechanism is provided at the bottom of the lower chamber module, and the lifting mechanism is used to lift the lower chamber module so that it cooperates with the upper chamber module to seal.

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