An automatic detection device and method for a power battery cover plate

Abstract

The present invention discloses an automatic detection device and method for a power battery cover plate, which includes a first detection device for detecting whether the explosion-proof valve of the power battery cover plate meets the design requirements of the blasting value. The first detection device has one or more first detection units, and each first detection unit includes: a first gantry bracket; a first upper fixture; a first lower fixture; a first detection gas interface; a pressure sensor; wherein, the first detection unit has a loading state and a detection state. When the first detection unit is in the detection state, the first lower fixture is located directly below the first upper fixture, and the first upper fixture and the first lower fixture are clamped together to clamp the power battery cover plate between the two. The first upper detection cavity and the first lower detection cavity are separated by the power battery cover plate and sealed into independent cavities. The automatic detection device of the present invention can automatically detect whether the explosion-proof valve of the power battery cover plate meets the design requirements of the blasting value and improve the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery manufacturing, and particularly relates to an automatic detection device and method for a power battery cover plate. Background Art

[0002] The continuous progress of science and technology has a great impact on the battery production and manufacturing industry. The batteries that provide power for equipment play an increasingly important role, and the market demand is also increasing. The components of the power battery cover plate include a top cover sheet, a pole column, and an explosion-proof valve, and the pole column and the explosion-proof valve are usually welded and assembled to the top cover sheet. After the pole column and the explosion-proof valve are welded to the top cover sheet, currently, the airtightness of the power battery is detected to judge the welding quality of the pole column and the explosion-proof valve, that is, whether there is a lack of welding, and to judge whether the power battery cover plate meets the designed airtightness requirements. However, for a qualified power battery cover plate, in addition to meeting the airtightness requirements, it is also necessary to detect whether the explosion-proof valve can meet the designed burst value requirements, and there is currently no solution for burst value detection. Summary of the Invention

[0003] Aiming at the above problems, the purpose of the present invention is to provide an automatic detection device and method for a power battery cover plate, which can automatically detect whether the explosion-proof valve of the power battery cover plate meets the designed burst value requirements, improve the detection efficiency, and reduce the occupied space.

[0004] According to one aspect of the present invention, an automatic detection device for a power battery cover plate includes a first detection device for detecting whether the explosion-proof valve of the power battery cover plate meets the designed burst value requirements. The first detection device has one or more first detection units, and each first detection unit includes:

[0005] A first gantry bracket;

[0006] A first upper jig, which is movably arranged on the first gantry bracket along the z-axis, and a first upper detection cavity is provided on the first upper jig;

[0007] A first lower jig, which is used to carry the power battery cover plate and move along the y-axis, and a first lower detection cavity is provided on the first lower jig;

[0008] A first detection gas interface, which is communicated with the first upper detection cavity or the first lower detection cavity to inject a first detection gas;

[0009] A pressure sensor, which is arranged in the first upper detection cavity or the first lower detection cavity to detect whether the air pressure changes;

[0010] Among them, the first detection unit has a loading state and a detection state. When the first detection unit is in the loading state, the first lower fixture deviates from directly below the first upper fixture to allow the power battery cover plate to be placed on the first lower fixture; when the first detection unit is in the detection state, the first lower fixture is located directly below the first upper fixture, and the first upper fixture and the first lower fixture are closed to clamp the power battery cover plate therebetween, and the first upper detection cavity and the first lower detection cavity are separated by the power battery cover plate and sealed into independent cavities.

[0011] In a preferred embodiment, an upper sealing member for contact and cooperation with the power battery cover plate is provided on the first upper fixture, and a lower sealing member for contact and cooperation with the power battery cover plate is provided on the first lower fixture.

[0012] In a more preferred embodiment, the first detection gas interface is communicated with the first upper detection cavity, and the air pressure sensor is arranged in the first upper detection cavity; a plurality of positioning pins are provided on one of the first upper fixture and the first lower fixture, and a plurality of positioning grooves are provided on the other, and the positioning pins and / or the positioning grooves have inclined positioning guiding slopes. When the first detection unit is in the detection state, the positioning pins are inserted into the positioning grooves.

[0013] Furthermore, the first detection unit further includes a first downward pressing cylinder for driving the first upper fixture to move along the z-axis; the first detection unit further includes a first material transfer driving mechanism for driving the first lower fixture to move along the y-axis. The first lower fixture is arranged on a first sliding seat, and the first sliding seat is movably arranged along the y-axis on a first y-direction guide rail.

[0014] In a preferred embodiment, the automatic detection device further includes a second detection device for detecting the air tightness of the power battery cover plate. The first detection device and the second detection device are arranged in sequence along the x-axis. The second detection device includes a second gantry bracket and one or more second detection units. Each second detection unit includes:

[0015] A second upper fixture, which is movably arranged along the z-axis on the second gantry bracket, and a second upper detection cavity is provided on the second upper fixture;

[0016] A second lower fixture, which is used to carry the power battery cover plate to move along the y-axis, and a second lower detection cavity is provided on the second lower fixture;

[0017] A second detection gas interface;

[0018] A mass spectrometer interface, which is used to connect with a mass spectrometer;

[0019] Wherein, one of the second detection gas interface and the mass spectrometer interface is in communication with the second upper detection cavity, and the other is in communication with the second lower detection cavity;

[0020] The second detection unit has a loading state and a detection state. When the second detection unit is in the loading state, the second lower fixture deviates from directly below the second lower fixture to allow the power battery cover plate to be placed on the second lower fixture; when the second detection unit is in the detection state, the second lower fixture is located directly below the second upper fixture, and the second upper fixture and the second lower fixture are clamped together to clamp the power battery cover plate therebetween. The second upper detection cavity and the second lower detection cavity are separated by the power battery cover plate and sealed into independent cavities.

[0021] In a preferred embodiment, the second detection gas interface is in communication with the second upper detection cavity, and the mass spectrometer interface is in communication with the second lower detection cavity when the second detection unit is in the detection state; the second detection unit further includes a second sliding seat, the second sliding seat is movably arranged along the y-axis on a second y-direction guide rail, the second lower fixture is arranged on the second sliding seat, a second detection gas outlet is provided on the second sliding seat, a second detection gas inlet communicating with the second lower detection cavity is opened on the second lower fixture, the second detection gas outlet is communicated to the second detection gas outlet through a pipeline or a gas passage opened on the second sliding seat, the mass spectrometer interface is in butt joint communication with the second detection gas outlet when the second detection unit is in the detection state, and a sealing ring is provided at the mass spectrometer interface and / or the second detection gas outlet.

[0022] In a preferred embodiment, at least one of the second detection units includes a plurality of the second upper fixtures arranged in sequence along the x-axis and a plurality of the second lower fixtures arranged in sequence along the x-axis. The plurality of second lower fixtures are arranged on the second sliding seat, a plurality of second detection gas outlets are provided on the second sliding seat at intervals along the x-axis, a second detection gas inlet communicating with the second lower detection cavity is opened on each second lower fixture, and each second detection gas inlet is communicated to a corresponding second detection gas outlet through a pipeline or a gas passage opened on the second sliding seat.

[0023] In a preferred embodiment, the mass spectrometer interface is movably arranged along the z-axis, and the mass spectrometer interface is in tight contact with the second sliding seat when the second detection unit is in the detection state; the mass spectrometer interface is lower than the second sliding seat when the second detection unit is in the loading state.

[0024] In a preferred embodiment, the automatic detection device further includes a transfer positioning disk disposed between the first detection device and the second detection device. The transfer positioning disk is provided with a plurality of positioning grooves for placing the power battery cover plates, and the positioning grooves have positioning inclined surfaces. The automatic detection device further includes a first transfer arm for moving the power battery cover plate detected by the first detection device to the positioning groove and a second transfer arm for moving the power battery cover plate in the positioning groove to the second lower fixture. The first detection device includes two first detection units spaced along the y-axis. Each first detection unit includes a plurality of first upper fixtures and a plurality of first lower fixtures arranged in sequence along the x-axis. A pneumatic pressure sensor is provided on each first upper fixture. The two first detection units share a first y-direction guide rail, and the first lower fixtures of the two first detection units are movably arranged along the first y-direction guide rail. The second detection device includes a plurality of second detection units spaced along the x-axis. Each second detection unit includes a plurality of second upper fixtures and a plurality of second lower fixtures arranged in sequence along the x-axis. The second lower detection cavities of the plurality of second lower fixtures of each second detection unit are respectively communicated with the same mass spectrometer interface.

[0025] According to another aspect of the present invention, an automatic detection method for a power battery cover plate uses the above automatic detection device. The automatic detection method includes a detection step of whether the explosion-proof valve meets the design requirements of the blasting value, and this detection step includes:

[0026] S101. Move the first lower fixture to the loading position and place the power battery cover plate on the first lower fixture.

[0027] S102. Move the first lower fixture to directly below the first upper fixture.

[0028] S103. Lower the first upper fixture to close the first upper fixture and the first lower fixture, so that the first upper detection cavity forms a sealed cavity and the second lower detection cavity forms a sealed cavity.

[0029] S104. Spray a set amount of the first detection gas into the first upper detection cavity or the first lower detection cavity and maintain the pressure for a period of time. Detect the pressure change value in the cavity during this period through the pneumatic pressure sensor. If the pressure change value is greater than or equal to the set threshold, it is determined that the product is unqualified; if the pressure change value is less than the set threshold, it is determined that the blasting value of the product meets the design requirements.

[0030] The present invention adopts the above solutions and has the following advantages compared with the prior art:

[0031] The automatic detection equipment and method for the power battery cover plate of the present invention place the power battery cover plate on the first lower fixture. In the detection state, the first upper fixture and the first lower fixture are closed, and the power battery cover plate is located between the first upper fixture and the first lower fixture. The first upper detection cavity and the first lower detection cavity form a sealed cavity. Then, a set amount of the first detection gas is sprayed into the first upper detection cavity, and the air pressure change value in the first upper detection cavity is detected by a pressure sensor to determine whether the explosion-proof valve meets the blasting value. It can automatically detect whether the explosion-proof valve of the power battery cover plate meets the design requirements of the blasting value. If the blasting value is not met, other detections such as airtightness detection will not be carried out, and the defective products will be screened out in advance. The defective products do not need to be subjected to the next detection, improving the detection work efficiency and reducing the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 Structural schematic diagram of the automatic detection equipment according to an embodiment of the present invention;

[0034] Figure 2 Stereogram of two first detection units according to an embodiment of the present invention, where one first detection unit is in the material loading state and the other first detection unit is about to switch to the detection state;

[0035] Figure 3 is Figure 2 front view of the structure shown;

[0036] Figure 4 Structural schematic diagram of one of the first detection units in the detection state according to an embodiment of the present invention;

[0037] Figure 5 Partial structural schematic diagram of the first detection unit;

[0038] Figure 6 Another partial structural schematic diagram of the first detection unit;

[0039] Figure 7 Flowchart of the blasting value detection steps according to an embodiment of the present invention;

[0040] Figure 8 Stereogram of the second detection unit in the feeding state;

[0041] Figure 9 is Figure 8 front view of the structure shown;

[0042] Figure 10 Is a perspective view of the second detection unit in the detection state;

[0043] Figure 11 Is Figure 10 The front view of the structure shown;

[0044] Figure 12a Is a partial structural schematic diagram of one of the second detection units;

[0045] Figure 12b Is a partial structural schematic diagram of the third detection unit;

[0046] Figure 13 Is another partial structural schematic diagram of one of the second detection units;

[0047] Figure 14 Is a perspective view of the transfer positioning disk;

[0048] Figure 15 Is Figure 14 The partial enlarged view at A in

[0049] Figure 16 Is a structural schematic diagram of the first transfer arm and the picking arm;

[0050] Figure 17 Is a structural schematic diagram of the second transfer arm and the discharging arm;

[0051] Figure 18 Is a structural schematic diagram of the second lower jig;

[0052] Figure 19 Is Figure 18 The front view of the second lower jig shown;

[0053] Figure 20 Is a structural schematic diagram of the upper jig.

[0054] Among them,

[0055] 100. Feeding belt; 101. Feeding arm; 102. Rotary jig; 103. Scanning device;

[0056] 200. Power battery cover plate; 201. Sealing ring; 202. Sealing gasket;

[0057] 1. First detection unit; 11. First gantry bracket; 12. First upper fixture; 121. First upper detection cavity; 122. Positioning pin; 123. Upper seal; 13. First lower fixture; 131. First lower detection cavity; 132. Lower seal; 15. First lower pressing cylinder; 16. First material transfer driving mechanism; 161. Motor; 162. First lead screw; 17. Guide post; 2. Positioning pin; 3. Positioning hole; 31. Guiding inclined surface; 4. First sliding seat; 5. First Y-direction guide rail

[0058] 6. Second detection device; 61. Second gantry device; 62. Second detection unit; 621. Second upper fixture; 6211. Second upper detection cavity; 622. Second lower fixture; 6221. Second lower detection cavity; 6222. Second detection gas inlet; 624. Mass spectrometer interface; 625. Second sliding seat; 626. Lifting cylinder; 63. Second lower pressing cylinder; 64. Third detection unit; 641. Misalignment cylinder: 642. First mass spectrometer interface; 643. Second mass spectrometer interface; 7. Second Y-direction guide rail; 71. Y-direction motor; 72. Second lead screw; 8. Transfer positioning disk; 81. Positioning groove; 811. Positioning inclined surface; 9. First material transfer arm; 91. Second material transfer arm; 92. Material picking arm; 10. Detection gas inlet Detailed implementation manners

[0059] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention

[0060] Refer to Figures 1 to 6 As shown, the automatic detection equipment for the power battery cover plate provided in this embodiment includes a first detection device for detecting whether the explosion-proof valve of the power battery cover plate meets the design requirements of the bursting value. The first detection device has one or more first detection units 1, and each first detection unit 1 includes: a first gantry bracket 11; a first upper fixture 12; a first lower fixture 13; a first detection gas interface; a pressure sensor; a first lower pressing cylinder 15; a first material transfer driving mechanism 16; a guide post 17

[0061] Further, the first upper fixture 12 is movably arranged on the first gantry support 11 along the z-axis. A first upper detection cavity 121 is provided on the first upper fixture 12, and the first downward pressing cylinder 15 drives the first upper fixture 12 to move up and down. The first material transfer driving mechanism 16 includes a motor 161 and a first lead screw 162. The first slide seat 4 is movably arranged on the first y-direction guide rail 5 along the y-axis and is driven to move by the motor 161 through the first lead screw 162. The first lower fixture 12 is arranged on the first slide seat 4. Therefore, the motor 161 drives the first lower fixture 13 to move along the y-axis through the first lead screw 162. The first lower fixture 13 is used to carry the power battery cover and move along the y-axis. A first lower detection cavity 131 is provided on the first lower fixture 13. The first detection gas interface is communicated with the first upper detection cavity 121 or the first lower detection cavity 131 to inject the first detection gas; the air pressure sensor is arranged in the first upper detection cavity 121 or the first lower detection cavity 131 to detect whether the air pressure changes; specifically in this embodiment, the first upper detection cavity 121 is provided with Figure 20 a plurality of detection gas inlets 10 as shown, the first detection gas interface is communicated with the detection gas inlets 10 of the first upper detection cavity 121, and the air pressure sensor (not shown in the figure) is arranged in the first upper detection cavity 121; guide holes are provided on the first gantry support 11, and a plurality of guide posts 17 pass through the guide holes on the first gantry support 11 and are fixedly connected with the first upper fixture 12 to play a guiding role.

[0062] Furthermore, in combination with Figure 5 and Figure 6 as shown, the first detection device includes two first detection units 1 arranged at intervals along the y-axis. Each first detection unit 1 includes a plurality of first upper fixtures 12 and a plurality of first lower fixtures 13 arranged in sequence along the x-axis. An air pressure sensor is arranged on each first upper fixture 12. The two first detection units 1 share the first y-direction guide rail 5. The first lower fixtures 13 of the two first detection units 1 are movably arranged along the first y-direction guide rail 5. Only the first lower fixture 13 of one first detection unit 1 moves to the blanking position at the same time.

[0063] Referring to Figures 2 to 4 as shown, the first detection unit 1 has a loading state and a detection state. When the first detection unit 1 is in the loading state, the first lower fixture 13 deviates from directly below the first upper fixture 12 to allow the power battery cover 200 to be placed on the first lower fixture 13; when the first detection unit 1 is in the detection state, the first lower fixture 13 is located directly below the first upper fixture 12, and the first upper fixture 12 and the first lower fixture 13 are closed to clamp the power battery cover 200 between them. The first upper detection cavity 121 and the first lower detection cavity 131 are separated by the power battery cover 200 and sealed into independent cavities. Further, an upper seal 123 is provided on the first upper fixture 12, and a lower seal 132 is provided on the first lower fixture 13 (the lower seal 132 specifically refers to Figure 18As shown by the sealing ring 201 and the sealing gasket 202, the first upper detection cavity 121 is sealed by the upper seal 123, and the first lower detection cavity 131 is sealed by the lower seal 132. The upper seal 123 and the lower seal 132 are used to contact and cooperate with the power battery cover plate 200 to ensure that the first upper detection cavity 121 and the second lower detection cavity 131 are sealed cavities during detection.

[0064] Among the first upper fixture 12 and the first lower fixture 13, one is provided with a plurality of positioning pins 122, and the other is provided with a plurality of positioning holes 3. The positioning pins 122 and the positioning holes 3 have inclined positioning guiding slopes 31. Specifically in this embodiment, the first upper fixture 12 is provided with Figure 5 two positioning pins 122 as shown, and the first lower fixture 13 is provided with Figure 6 two positioning holes 3 as shown. The two positioning pins 122 are located at the diagonal positions of the first upper fixture 12, and the two positioning holes 3 are located at the diagonal positions of the first lower fixture 13. When the first detection unit 1 is in the detection state, the positioning pins 122 are inserted into the positioning holes 3 under the action of the guiding slopes 31.

[0065] Referring to Figure 7 As shown, this embodiment also provides an automatic detection method for a power battery cover plate. Using the above automatic detection equipment, the automatic detection method includes a detection step of whether the explosion-proof valve meets the design requirements of the blasting value. The blasting value detection step includes:

[0066] S101. Move the first lower fixture 13 to the loading position and place the power battery cover plate 200 on the first lower fixture 13;

[0067] S102. Move the first lower fixture 13 to directly below the first upper fixture 12;

[0068] S103. Lower the first upper fixture 12 to make the first upper fixture 12 and the first lower fixture 13 close the mold. The first upper detection cavity 121 forms a sealed cavity, and the first lower detection cavity 131 forms a sealed cavity;

[0069] S104. Spray a set amount of the first detection gas into the first upper detection cavity 121 or the first lower detection cavity 131 and keep the pressure for a period of time. Detect the pressure change value in the cavity during this period through a pressure sensor. If the pressure change value is greater than or equal to the set threshold, it is determined that the product is unqualified; if the pressure change value is less than the set threshold, it is determined that the blasting value of the product meets the design requirements.

[0070] Further, in step S101, the first lower fixture 13 moves to the material waiting position, places a plurality of power battery covers into the plurality of first lower fixtures 13, the plurality of first lower fixtures 13 synchronously move to the corresponding detection positions (idle detection positions), the first lower fixture 13 and the first upper fixture 12 are closed to detect whether the bursting value of the product meets the design requirements. After the detection is completed, the first upper fixture 12 is lifted, and the first lower fixture 13 moves to the material waiting position to unload the product.

[0071] Each first detection unit 1 of this embodiment detects four power battery covers 200 at a time, with high working efficiency. After the power battery cover 200 is placed on the first lower fixture 13, the first upper fixture 12 and the first lower fixture 13 are closed to clamp the power battery cover 200 between them. The power battery cover 200 separates the first upper detection cavity 121 and the first lower detection cavity 131. Then, air is sprayed into the first upper detection cavity 121 and pressurized. The air pressure change value during this period can be obtained through the air pressure sensor to determine whether the product is qualified. After the detection is completed, the first upper fixture 12 moves upward along the z-axis, and the product is unloaded for the next detection.

[0072] Further, the airtightness of the power battery cover 200 directly affects the performance and use of the finished product. Referring to Figure 1 、 Figures 8 to 16 As shown, the automatic detection device further includes a second detection device 6 for detecting the airtightness of the power battery cover. The first detection device and the second detection device 6 are arranged in sequence along the x-axis. The second detection device 6 includes a second gantry bracket 61 and a plurality of second detection units 62. Each second detection unit 62 includes: a plurality of second upper fixtures 621 arranged in sequence along the x-axis; a plurality of second lower fixtures 622 arranged in sequence along the x-axis; a second detection gas interface; a mass spectrometer interface 624; a lifting cylinder 626; and a second downward pressing cylinder 63.

[0073] Further, the second upper fixture 621 is movably arranged on the second gantry bracket 61 along the z-axis by the drive of the second downward pressing cylinder 63. The second upper fixture 621 is provided with a second upper detection cavity 6211 and an upper seal 123 in contact with the power battery cover. The second lower fixture 622 is used to carry the power battery cover 200 and move along the y-axis. The second lower fixture 622 is provided with a second lower detection cavity 6221 and a lower seal 132 in contact with the power battery cover. The mass spectrometer interface 624 is used to connect to a mass spectrometer. Among them, one of the second detection gas interface and the mass spectrometer interface 624 is communicated with the second upper detection cavity 6211, and the other is communicated with the second lower detection cavity 6221. Specifically, in this embodiment, the second detection gas interface is arranged on each second upper fixture 621 and is communicated with the second upper detection cavity 6211, and the mass spectrometer interface 624 is communicated with the second lower detection cavity 6221.

[0074] Further, the second detection device 6 includes a plurality of second detection units 62 arranged at intervals along the x-axis and a third detection unit 64. The third detection unit 64 includes a plurality of second upper jigs 621 and a plurality of second lower jigs 622 arranged in sequence along the x-axis. Each second detection unit 62 includes a plurality of second upper jigs 621 and a plurality of second lower jigs 622 arranged in sequence along the x-axis. The second lower detection cavities 6221 of the plurality of second lower jigs 622 of each second detection unit 62 are respectively communicated with the same mass spectrometer interface 624.

[0075] Referring to Figures 8 to 11 As shown, the second detection unit 62 has a loading state and a detection state. When the second detection unit 62 is in the loading state, the second lower jig 622 deviates from directly below the second upper jig 621 to allow the power battery cover plate 200 to be placed on the second lower jig 622. When the second detection unit 62 is in the detection state, the second lower jig 622 is located directly below the second upper jig 621, the mass spectrometer interface 624 is communicated with the second lower detection cavity 6221, the second upper jig 621 and the second lower jig 622 are clamped to hold the power battery cover plate 200 therebetween, and the second upper detection cavity 6211 and the second lower detection cavity 6221 are separated and sealed as independent cavities by the power battery cover plate 200.

[0076] Further, the second detection unit 6 further includes a second slide 625. The second slide 625 is movably arranged along the y-axis on the second y-direction guide rail 7 and is driven to move by a y-direction motor 71 through a second lead screw 72. The second lower jig 622 is arranged on the second slide 625. A plurality of second detection gas outlets are arranged at intervals along the x-axis on the second slide 625. A second detection gas inlet 6222 communicating with the second lower detection cavity 6221 is opened on each second lower jig 622 (referring to Figure 18 and Figure 19 as shown). Each second detection gas inlet 6222 is communicated to a corresponding second detection gas outlet through a pipeline or a gas channel opened on the second slide 625.

[0077] Similarly, each lower fixture of the third detection unit 64 is provided with a detection gas inlet communicating with the lower detection chamber. The difference is only that the sliding seat of the third detection unit 64 is provided with a plurality of detection gas outlets arranged at intervals along the x-axis, and each detection gas inlet corresponds to and communicates with a detection gas outlet. The third detection unit 64 is provided with a first mass spectrometer interface 642 and a second mass spectrometer interface 643. When the third detection unit 64 is in the detection state, the two detection gas outlets are in butt joint communication with the first mass spectrometer interface 642 and the second mass spectrometer interface 643 in a one-to-one correspondence. Specifically, each second detection unit 62 detects multiple (such as 4) products at a time. If the mass spectrometer connected to each second detection unit 62 does not detect air leakage, the multiple products of the second detection unit 62 are all determined to be qualified; if the mass spectrometer connected to the second detection unit 62 detects air leakage, it is determined that at least one of the multiple products of the second detection unit 62 is unqualified, and the multiple products are sent to the third detection unit 64 for further re-inspection to accurately locate which product is unqualified. Considering the detection efficiency, accuracy and equipment cost, while improving the detection efficiency, accurate detection can be achieved with fewer mass spectrometers, and the number of air valves and helium valves is greatly reduced.

[0078] Furthermore, when the second detection unit 62 is in the detection state, the mass spectrometer interface 624 is in butt joint communication with the second detection gas outlet, and a sealing ring is provided at the mass spectrometer interface 624 and the second detection gas outlet to achieve sealing. The mass spectrometer interface 624 is movably arranged along the z-axis through a lifting cylinder 626. When the second detection unit 62 is in the detection state, the mass spectrometer interface 624 is in tight contact with the second sliding seat 625 to facilitate the butt joint communication between the mass spectrometer interface 624 and the second detection gas outlet; when the second detection unit 62 is in the feeding state, the mass spectrometer interface 624 is lower than the second sliding seat 625, which is convenient for feeding.

[0079] Refer to Figure 1 、 Figures 14 to 17 As shown in the figure, the automatic detection device further includes a transfer positioning disk 8; a first transfer arm 9; a second transfer arm 91; a picking arm 92; a rotating fixture 102.

[0080] Furthermore, since the incoming material direction of the product is perpendicular to the detection direction, the transfer positioning disk 8 is required as a transfer station to change the orientation of the product. The transfer positioning disk 8 is arranged between the first detection device and the second detection device 6. The products that pass the first detection device are transferred by the transfer positioning disk 8 and repositioned, which facilitates the next material taking. More specifically, a plurality of positioning grooves 81 are provided on the transfer positioning disk 8. The positioning grooves 81 have positioning inclined surfaces 811. The power battery cover plate 200 is placed in the positioning grooves 81 through the positioning inclined surfaces 811 to achieve precise positioning. The material taking arm 92 adsorbs a plurality of power battery cover plates 200 from the rotary jig 102 and places the plurality of power battery cover plates 200 on the first lower jig 13 to detect whether the explosion-proof valve meets the design requirements of the bursting value. After the detection is completed, the first transfer arm 9 moves the power battery cover plate that has been detected by the first detection device into the positioning groove 81. The second transfer arm 10 is used to move the power battery cover plate in the positioning groove 81 to the second lower jig 622. After the second lead screw 72 drives the second lower jig 13 to move to the detection position (to detect the air tightness of the power battery cover plate), the second upper jig 621 and the second lower jig 622 are closed. The lifting cylinder 626 drives the mass spectrometer interface 624 to rise for air tightness detection. The mass spectrometer interface 624 and the second sliding seat 625 are in tight contact. After the detection is completed, the second upper jig 621 moves upward along the z-axis, and the lead screw 72 drives the second lower jig 622 to move to the material discharging position.

[0081] The automatic detection device further includes a feeding belt 100, a feeding arm 101, and a code scanning device 103. After the product is placed on the feeding belt 100, the feeding arm 101 picks up the product and passes through the code scanning device 103 for code scanning and recording. After passing the code scanning, the product is placed on the rotary jig 102. The picking arm 92 adsorbs the product from the rotary jig 102 and places it into the first detection module. When the first detection device is in the detection state, the first upper jig 12 and the first lower jig 13 are closed. A set amount of air is sprayed into the first upper detection cavity 121 and pressurized for a period of time. The air pressure change value during this period is detected by the air pressure sensor in the first upper detection cavity 121 to determine whether the bursting value of the product meets the design requirements. If the product does not meet the design requirements, it is discharged. If the product meets the design requirements, the power battery cover 200 is moved to the positioning groove 81 in the transfer positioning disk 8 by the first transfer arm 9, and then the power battery cover 200 in the positioning groove 81 is moved to the second lower jig 622 by the second transfer arm 10 to detect the airtightness of the power battery cover. When in the detection state, the second lower jig 622 and the second upper jig 621 are closed to clamp the power battery cover 200 therebetween. Helium is sprayed into the second upper detection cavity 121. A mass spectrometer detects four products at a time, with higher working efficiency and reduced number of mass spectrometers used. The baffle valve is cancelled, saving costs. If the mass spectrometer detects that gas leaks into the lower detection cavity 131, there are defective products in the power battery plate. If the mass spectrometer detects that gas does not leak into the lower detection cavity 131, the power battery cover is qualified.

[0082] For the automatic detection device of the power battery cover in this embodiment, before detecting the airtightness of the power battery cover, the first detection device is used to detect whether the explosion-proof valve of the power battery cover meets the bursting value design requirements, and defective products are screened out in advance. Only products whose explosion-proof valves meet the bursting value design requirements can undergo the next airtightness detection, improving the working efficiency.

[0083] As shown in this specification and the claims, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The term "and / or" used herein includes any combination of one or more of the related listed items.

[0084] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the drawings. Reference can be made to the attached Figure 1 。

[0085] It can be further understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0086] It can be further understood that terms such as "first" and "second" are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other and do not represent a specific order or degree of importance. In fact, expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0087] The above embodiments are only for illustrating the technical concept and features of the present invention and are a preferred embodiment. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it should not be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic detection device for a power battery cover plate, characterized in that, it includes a first detection device for detecting whether the explosion-proof valve of the power battery cover plate meets the design requirements of the blasting value. The first detection device has one or more first detection units, and each first detection unit includes: A first gantry bracket; A first upper fixture, which is movably arranged on the first gantry bracket along the z-axis, and a first upper detection cavity is provided on the first upper fixture; A first lower fixture, which is used to carry the power battery cover plate and move along the y-axis, and a first lower detection cavity is provided on the first lower fixture; A first detection gas interface, which is communicated with the first upper detection cavity or the first lower detection cavity to inject the first detection gas; A pressure sensor, which is arranged in the first upper detection cavity or the first lower detection cavity to detect whether the air pressure changes; Wherein, the first detection unit has a loading state and a detection state. When the first detection unit is in the loading state, the first lower fixture deviates from directly below the first upper fixture to allow the power battery cover plate to be placed on the first lower fixture; when the first detection unit is in the detection state, the first lower fixture is located directly below the first upper fixture, and the first upper fixture and the first lower fixture are closed to clamp the power battery cover plate between the two. The first upper detection cavity and the first lower detection cavity are separated by the power battery cover plate and sealed into independent cavities; the automatic detection device further includes a second detection device for detecting the airtightness of the power battery cover plate. The second detection device includes a plurality of second detection units arranged at intervals along the x-axis and a third detection unit. Each second detection unit includes a second gantry bracket and one or more second detection units. Each second detection unit includes: a second upper fixture, which is movably arranged on the second gantry bracket along the z-axis, and a second upper detection cavity is provided on the second upper fixture; a second lower fixture, which is used to carry the power battery cover plate and move along the y-axis, and a second lower detection cavity is provided on the second lower fixture; a second detection gas interface; a mass spectrometer interface, which is used to connect with a mass spectrometer; the second detection gas interface is arranged on each second upper fixture and is communicated with the second upper detection cavity. The second lower detection cavities of the plurality of lower fixtures of each second detection unit are respectively communicated with the same mass spectrometer interface; the third detection unit includes a plurality of second upper fixtures and a plurality of second lower fixtures arranged in sequence along the x-axis. A detection gas inlet communicated with the second lower detection cavity of the second lower fixture is opened on the second lower fixture of the third detection unit. A plurality of detection gas outlets arranged at intervals along the x-axis are provided on the slide of the third detection unit. Each detection gas inlet corresponds to and is communicated with a detection gas outlet; the third detection unit further has a first mass spectrometer interface and a second mass spectrometer interface. When the third detection unit is in the detection state, the two detection gas outlets are in one-to-one docking communication with the first mass spectrometer interface and the second mass spectrometer interface.

2. The automatic detection device according to claim 1, characterized in that, The first upper jig is provided with an upper seal for contact and cooperation with the power battery cover plate, and the first lower jig is provided with a lower seal for contact and cooperation with the power battery cover plate.

3. The automatic detection device according to claim 2, characterized in that the first detection gas interface is communicated with the first upper detection cavity, and the air pressure sensor is arranged in the first upper detection cavity; a plurality of positioning pins are arranged on one of the first upper jig and the first lower jig, and a plurality of positioning grooves are arranged on the other one, and the positioning pins and / or the positioning grooves have inclined positioning guiding slopes. When the first detection unit is in the detection state, the positioning pins are inserted into the positioning grooves.

4. The automatic detection device according to claim 1, characterized in that the first detection unit further includes a first pressing cylinder for driving the first upper jig to move along the z-axis; the first detection unit further includes a first material transfer driving mechanism for driving the first lower jig to move along the y-axis. The first lower jig is arranged on a first sliding seat, and the first sliding seat is movably arranged along the y-axis on a first y-direction guide rail.

5. The automatic detection device according to claim 1, characterized in that the second detection unit has a loading state and a detection state. When the second detection unit is in the loading state, the second lower jig deviates from directly below the second upper jig to allow the power battery cover plate to be placed on the second lower jig; when the second detection unit is in the detection state, the second lower jig is located directly below the second upper jig, and the second upper jig and the second lower jig are closed to clamp the power battery cover plate therebetween. The second upper detection cavity and the second lower detection cavity are separated by the power battery cover plate and sealed into independent cavities.

6. The automatic detection device according to claim 5, characterized in that the second detection unit further includes a second sliding seat, the second sliding seat is movably arranged along the y-axis on a second y-direction guide rail, the second lower jig is arranged on the second sliding seat, the second sliding seat is provided with a second detection gas outlet, the second lower jig is provided with a second detection gas inlet communicated with the second lower detection cavity, and the second detection gas inlet is communicated with the second detection gas outlet through a pipeline or a gas channel opened on the second sliding seat. When the second detection unit is in the detection state, the mass spectrometer interface is docked and communicated with the second detection gas outlet, and sealing rings are arranged at the mass spectrometer interface and / or the second detection gas outlet.

7. The automatic detection device according to claim 6, characterized in that At least one of the second detection units includes a plurality of the second upper jigs arranged in sequence along the x-axis and a plurality of the second lower jigs arranged in sequence along the x-axis. The plurality of the second lower jigs are arranged on the second slide, and a plurality of second detection gas outlets spaced along the x-axis are provided on the second slide. A second detection gas inlet communicating with the second lower detection cavity is formed on each of the second lower jigs, and each second detection gas inlet is communicated to a corresponding second detection gas outlet through a pipeline or a gas passage formed on the second slide.

8. The automatic detection device according to claim 6, wherein, the mass spectrometer interface is movably arranged along the z-axis, and the mass spectrometer interface is in tight contact with the second slide when the second detection unit is in the detection state; the mass spectrometer interface is lower than the second slide when the second detection unit is in the loading state.

9. The automatic detection device according to claim 5, wherein, the automatic detection device further includes a transfer positioning disk arranged between the first detection device and the second detection device. A plurality of positioning grooves for placing the power battery cover plate are provided on the transfer positioning disk, and the positioning grooves have positioning inclined surfaces; the automatic detection device further includes a first transfer arm for moving the power battery cover plate detected by the first detection device to the positioning groove and a second transfer arm for moving the power battery cover plate in the positioning groove to the second lower jig; the first detection device includes two first detection units spaced along the y-axis, each first detection unit includes a plurality of the first upper jigs and a plurality of the first lower jigs arranged in sequence along the x-axis, a pressure sensor is arranged on each of the first upper jigs, the two first detection units share a first y-direction guide rail, and the first lower jigs of the two first detection units are movably arranged along the first y-direction guide rail; the second detection device includes a plurality of second detection units spaced along the x-axis, each second detection unit includes a plurality of the second upper jigs and a plurality of the second lower jigs arranged in sequence along the x-axis, and the second lower detection cavities of the plurality of second lower jigs of each second detection unit are respectively communicated with the same mass spectrometer interface.

10. An automatic detection method for a power battery cover plate, wherein, the automatic detection device as claimed in claim 1 is adopted, and the automatic detection method includes a detection step of whether the explosion-proof valve meets the design requirements of the blasting value, and this detection step includes: S101. Move the first lower jig to the loading position and place the power battery cover plate on the first lower jig; S102. Move the first lower jig to directly below the first upper jig; S103. Lower the first upper jig to make the first upper jig and the first lower jig close the mold, the first upper detection cavity forms a sealed cavity, and the second lower detection cavity forms a sealed cavity; S104. Inject a set amount of the first detection gas into the first upper detection chamber or the first lower detection chamber and maintain the pressure for a period of time. Detect the change value of the air pressure in the chamber during this period through a pressure sensor. If the change value of the air pressure is greater than or equal to the set threshold, it is determined that the product is unqualified; if the change value of the air pressure is less than the set threshold, it is determined that the bursting value of the product meets the design requirements. The automatic detection method further includes a detection step for whether the airtightness of the power battery cover meets the requirements. This detection step includes first detecting whether the mass spectrometer connected to the second detection unit leaks air. If no air leakage is detected by this mass spectrometer, all the power battery covers of this second detection unit are determined to be qualified; if the mass spectrometer connected to this second detection unit detects air leakage, it is determined that at least one of the multiple power battery covers of this second detection unit is unqualified, and these multiple power battery covers are sent to the third detection unit for further re-inspection to accurately locate which product is unqualified.

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