Soft package battery detection equipment

Abstract

A soft package battery detection device relates to the technical field of soft package battery detection, and comprises a transmission mechanism arranged on a rack and used for transmitting a soft package battery, and a first detection mechanism and a second detection mechanism are sequentially arranged on the rack along the transmission direction of the soft package battery. The first detection mechanism comprises two cameras which are symmetrically arranged on the rack and are used for collecting soft package battery tab images, and the collected images are transmitted to the control unit; the second detection mechanism comprises a detector, a pressure difference detection assembly used for carrying out pressure difference detection on the soft package battery and a DCIR detection assembly used for carrying out DCIR detection on the soft package battery, and the pressure difference detection assembly comprises two groups of pressure difference detection units which are oppositely arranged. Tab welding detection, differential pressure detection and DCIR detection are carried out on the soft package battery in sequence, so that the whole-process online detection of the soft package battery is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack battery detection, and specifically relates to a soft-pack battery detection device. Background Art

[0002] In the continuous development process of the new energy field, soft-pack batteries, due to their significant advantages over traditional liquid batteries in terms of energy density and safety, have gradually become a key direction in battery technology research and application. Their electrolyte system is between liquid and all-solid-state, retaining both the high ionic conductivity of liquid electrolytes and enhancing mechanical stability and thermal safety through the introduction of solid components. However, in the large-scale production process of soft-pack batteries, tab welding, the consistency of battery cell voltage differences, and the stability of DC internal resistance play a decisive role in battery performance and yield. Therefore, after the soft-pack battery is processed, it is necessary to perform tab welding detection, voltage difference detection, and DCIR detection on it.

[0003] In the prior art, off-line sampling is mostly relied on to perform tab welding detection, voltage difference detection, and DCIR detection on soft-pack batteries, making it difficult to achieve full-process on-line monitoring. Summary of the Invention

[0004] In order to solve the problem that soft-pack batteries cannot be on-line detected in the prior art, the present invention provides a soft-pack battery detection device. After the soft-pack battery is processed, tab welding detection, voltage difference detection, and DCIR detection are successively performed on it to achieve full-process on-line detection of the soft-pack battery.

[0005] To achieve the above object, the specific solution adopted by the present invention is as follows: A soft-pack battery detection device, the soft-pack battery includes a plurality of sheet-shaped battery cells, the detection device includes a transmission mechanism arranged on a frame and used for transmitting the soft-pack battery, and a first detection mechanism and a second detection mechanism are successively arranged on the frame along the transmission direction of the soft-pack battery. The first detection mechanism includes two cameras symmetrically arranged on the frame and used for collecting tab images of the soft-pack battery, and transmits the collected images to a control unit; the second detection mechanism includes a detector, a voltage difference detection component used for performing voltage difference detection on the soft-pack battery, and a DCIR detection component used for performing DCIR detection on the soft-pack battery. The voltage difference detection component includes two sets of relatively arranged voltage difference detection units, and each voltage difference detection unit includes a plurality of detection rods corresponding to the tabs of the sheet-shaped battery cells. One end of the detection rod can be in contact with the corresponding tab, and the other end is electrically connected to the detector; the DCIR detection component includes two sets of DCIR detection units respectively corresponding to the two electrodes of the soft-pack battery, and each DCIR detection unit includes a detection head used for connecting to the electrode of the soft-pack battery, and both detection heads are electrically connected to the detector.

[0006] An optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: A first support frame is fixedly connected to the frame, and a first mounting plate for installing a camera is provided on the first support frame.

[0007] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: Mounting brackets are provided at both ends of the first mounting plate. The mounting brackets can slide in a direction perpendicular to the sliding direction of the soft-pack battery and can be fixed. The camera is fixedly arranged on the mounting brackets.

[0008] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: A second support frame is fixedly connected to the frame, and two differential pressure detection units and two DCIR detection units are both arranged on the second support frame.

[0009] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: The differential pressure detection unit further includes a first sliding plate slidably arranged on the second support frame, and the first sliding plate is driven by a first air cylinder. The detection rods of this differential pressure detection unit are all fixedly installed on the first sliding plate.

[0010] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: A first fixing plate is fixedly connected to the second support frame. The first air cylinder is fixedly installed on the first fixing plate, and the first sliding plate is slidably connected to the first fixing plate.

[0011] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: The DCIR detection unit further includes a second fixing plate for installing a detection head. The second fixing plate can move up and down driven by a second air cylinder. The detection head moves up and down with the second fixing plate and can be connected to or separated from the electrode of the soft-pack battery.

[0012] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: A connecting plate fixedly connected to the piston of the second air cylinder is arranged above the second fixing plate, and several springs are arranged between the connecting plate and the second fixing plate. One end of the spring is fixedly connected to the connecting plate, and the other end of the spring is connected to the second fixing plate.

[0013] Another optimized solution for a soft-pack battery detection device, which is one of the above-mentioned soft-pack battery detection devices: A third air cylinder installed on the frame is arranged between the two DCIR detection units. A top plate is arranged above the third air cylinder. The third air cylinder pushes the top plate to move upward, thereby driving the soft-pack battery located above it to move upward.

[0014] As another optimization solution for the soft-pack battery detection device described above: several fourth cylinders for pushing the soft-pack battery away from the top plate are provided on the top plate, a water tank is provided on one side of the frame, and a second cylinder for pushing the soft-pack battery away from the top plate into the water tank is provided on the other side of the frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a soft-pack battery detection device. The soft-pack battery slides along the extension direction of the transmission mechanism. When the soft-pack battery slides to the position of the first detection mechanism, the camera takes pictures of the tabs on both sides of the soft-pack battery, that is, collects the images of the tabs and transmits them to the control unit for post-welding detection of the tabs. After the post-welding detection of the tabs is completed, the soft-pack battery continues to slide along the transmission mechanism to the second detection mechanism. The detection rod contacts the corresponding tab, and the detector collects the voltage of each sheet-shaped battery cell. At the same time, the two detection heads are electrically connected to the two electrodes of the soft-pack battery respectively to perform DCIR detection on the soft-pack battery, realizing full-process online detection and improving the consistency and reliability of the soft-pack battery products.

[0017] 2. In the present invention, the third cylinder pushes the top plate upward, and then drives the soft-pack battery upward to the detection position.

[0018] 3. In the present invention, during the differential pressure detection and DCIR detection of the soft-pack battery, sparks are generated at the contact part between the detection rod and the tab. Therefore, when sparks appear in the soft-pack battery, the fourth cylinder jacks up the soft-pack battery, and the second cylinder pushes the soft-pack battery into the water tank. Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the present invention;

[0020] Figure 2 is the structural schematic diagram of the first detection mechanism;

[0021] Figure 3 is the structural schematic diagram of the transmission mechanism;

[0022] Figure 4 is the structural schematic diagram of the second detection mechanism;

[0023] Figure 5 is the structural schematic diagram of the positioning component;

[0024] Figure 6 is Figure 4 the partial enlarged view of;

[0025] Figure 7 is the front view of the frame;

[0026] Reference numerals: 1, frame; 101, first support frame; 102, second support frame; 103, transmission mechanism; 2, first detection mechanism; 201, camera; 202, first mounting plate; 203, mounting bracket; 204, first slider; 3, shadowless plate; 4, soft-pack battery; 401, bottom plate; 402, cover plate; 403, moving clamping plate; 404, lead screw; 405, horizontal slide rail; 406, static clamping plate; 407, side plate; 408, vertical slide rail; 409, horizontal slider; 5, differential pressure detection unit; 501, detection rod; 502, first slide plate; 503, first cylinder; 504, second mounting plate; 505, first fixing plate; 6, DCIR detection unit; 601, second fixing plate; 602, connecting plate; 603, spring; 604, second cylinder; 7, water tank; 8, positioning scanner; 9, top plate; 901, roller; 902, fourth cylinder; 10, inclined hole; 1001, wear-resistant wheel; 1002, linkage rod; 1003, locking knob; 11, electrode; 12, detection head; 13, fifth cylinder; 1301, first sleeve; 1302, jacking plate; 14, third cylinder; 1401, second sleeve; 1402, second guide rod; 15, positioning assembly; 1501, first swing wheel; 1502, vertical plate; 1503, second swing wheel; 1504, horizontal plate; 1505, base; 1506, fixed seat; 1507, positioning cylinder. Detailed implementation mode

[0027] The technical solutions of the present invention will be further elaborated in detail below in conjunction with specific embodiments. For the parts that are not detailedly recorded and disclosed in the following embodiments of the present invention, they should all be understood as the prior art known or should be known to those skilled in the art, such as the connection method of the control unit, how the control unit identifies the ear images, the structure of the detector, and how the detector detects the internal resistance and sheet-shaped battery cores of soft-pack batteries.

[0028] Embodiment

[0029] A soft-pack battery detection device includes a frame 1, and the soft-pack battery 4 slides along a transmission mechanism 103 arranged on the frame 1. In this embodiment, the transmission mechanism 103 is a double-speed line. A first detection mechanism 2 and a second detection mechanism are sequentially arranged along the transmission direction of the soft-pack battery 4. In this embodiment, a first detection station and a second detection station are respectively arranged along the extension direction of the double-speed line. The first detection mechanism 2 is located at the first detection station, and the second detection mechanism is located at the second detection station; the first detection mechanism 2 is used for post-welding detection of the ears of the soft-pack battery 4, and the second detection mechanism is used for differential pressure detection and DCIR detection of the soft-pack battery 4. As Figure 1As shown, the processed soft-pack battery 4 enters the detection device from right to left, and the soft-pack battery 4 is driven by the double-speed line to sequentially pass through the first detection station and the second detection station, so that the first detection mechanism 2 performs post-welding detection of the tabs, and the second detection mechanism performs differential pressure detection and DCIR detection, improving the consistency and reliability of the soft-pack battery 4 products.

[0030] In this embodiment, during the processing of the soft-pack battery 4, multiple sheet-shaped battery cores need to be orderly placed together and reliably clamped by the clamping unit, and then the tabs are welded. At the same time, the tabs of the sheet-shaped battery cores are connected to the return board so that the multiple sheet-shaped battery cores form two electrodes 11 of the soft-pack battery 4, namely the positive electrode and the negative electrode. The clamping unit includes a bottom plate 401 with rollers 901 at all four corners. The axis of the roller 901 is perpendicular to the bottom plate 401, that is, the roller 901 rotates along the side wall of the double-speed line. A static clamping plate 406 and a moving clamping plate 403 parallel to the static clamping plate 406 are arranged on the bottom plate 401. An elastic clamping area is formed between the static clamping plate 406 and the moving clamping plate 403. Among them, the static clamping plate 406 is fixedly connected to the bottom plate 401 by bolts; the connection mode of the moving clamping plate 403 and the bottom plate 401 is that two parallel horizontal slide rails 405 are fixed on the bottom plate 401. The extending direction of the horizontal slide rails 405 is perpendicular to the moving clamping plate 403. Two horizontal sliders 409 corresponding to the horizontal slide rails 405 are fixedly connected to the lower surface of the moving clamping plate 403. The horizontal sliders 409 can slide along the horizontal slide rails 405; a lead screw 404 is rotatably arranged on the bottom plate 401. Both ends of the lead screw 404 are connected to the bottom plate 401 through bearing seats; a connecting block with a threaded hole is fixedly arranged on the moving clamping plate 403. The connection mode of the connecting block and the moving clamping plate 403 is bolt connection. The threaded hole is matched with the lead screw 404. The lead screw 404 passes through the threaded hole and the rotation of the lead screw 404 drives the moving clamping plate 403 to reciprocate.

[0031] A bearing plate for carrying the sheet-shaped battery core is arranged between the static clamping plate 406 and the moving clamping plate 403. A plurality of uniformly distributed cushion blocks are arranged between the bearing plate and the bottom plate 401. The connection mode between the cushion blocks and the bottom plate 401 is bolt connection; elastic protection pads are fixedly arranged on the sides of the static clamping plate 406 and the moving clamping plate 403 close to the elastic clamping area. The protection pads are made of elastic rubber material to protect the surface of the sheet-shaped battery core.

[0032] Both ends of the static clamping plate 406 are provided with side plates 407. The side plates 407 are vertically slidably arranged on the bottom plate 401. Specifically, the side plates 407 are connected to the bottom plate 401 through two vertical sliding rails 408 and sliding grooves opened at the edges of the side plates 407, that is, the connection mode of the two vertical sliding rails 408 and the bottom plate 401 is bolt connection; an inclined hole 10 is opened on the side plate 407, a power column is slidably arranged in the inclined hole 10, a wear-resistant wheel 1001 is rotatably sleeved on the power column, and the diameter of the wear-resistant wheel 1001 is equal to the width of the inclined hole 10; the power column is fixedly connected with a linkage rod 1002 slidably arranged on the bottom plate 401. Specifically, one end of the linkage rod 1002 is fixedly connected with the power column, and a locking knob 1003 capable of fixing it is arranged at the other end of the linkage rod 1002. When fixing a plurality of sheet-shaped battery cells, the staff pushes the linkage plate to drive the power column to slide along the inclined hole 10, and then drives the side plate 407 to vertically move to the required position, and tightens the locking knob 1003 to fix the side plate 407.

[0033] In this embodiment, a cover plate 402 capable of being fixedly connected to the static clamping plate 406 and the moving clamping plate 403 is arranged at the top of the elastic clamping area.

[0034] The first detection mechanism 2 includes two cameras 201 symmetrically arranged on the frame 1 and used for collecting images of the tabs of the soft-pack battery 4, and transmits the collected images to the control unit. The control unit identifies the received images, and a collection area is formed between the two cameras 201. As Figure 2 shown, a first support frame 101 is fixedly connected to the frame 1. The first support frame 101 includes two vertical support rods located on both sides of the first detection station and a horizontal support rod. The two ends of the horizontal support rod are connected to the ends of the two vertical support rods by bolts. A first mounting plate 202 for mounting the camera 201 is arranged on the first support frame 101. A first sliding rail is fixedly connected to the first support frame 101. A first sliding block 204 is fixed on the first mounting plate 202. The first sliding block 204 slides along the first sliding rail and can be fixed, and the extending direction of the first sliding rail is parallel to the sliding direction of the soft-pack battery 4. In this embodiment, the connection mode of the first sliding rail and the first support frame 101 and the connection mode of the first sliding block 204 and the first mounting plate 202 are both bolt connections. The settings of the first sliding rail and the first sliding block 204 can adjust the position of the camera 201 to adapt to different soft-pack batteries 4, improving the application range of the present invention.

[0035] Mounting brackets 203 are provided at both ends of the first mounting plate 202. The mounting brackets 203 can slide along a direction perpendicular to the sliding direction of the soft-pack battery 4 and can be fixed. The connection between the mounting brackets 203 and the first mounting plate 202 is a bolt connection; the camera 201 is fixedly arranged on the mounting brackets 203, and the connection between the camera 201 and the mounting brackets 203 is a bolt connection, so as to adapt to soft-pack batteries 4 of different sizes and improve the applicable range of the present invention.

[0036] During the actual detection process, due to the illumination of the lights in the workshop and the influence of the environment, there is a deviation between the image collected by the camera 201 and the actual image. Therefore, a shadowless plate 3 is provided on one side of the camera 201 close to another camera 201. The top end of the shadowless plate 3 is fixedly connected to the first mounting plate 202. Correspondingly, a plurality of fixing holes distributed along the length direction of the first mounting plate 202 are formed on the first mounting plate 202. The shadowless plate 3 and the fixing holes are connected by bolts. According to the required position of the shadowless plate, the fixing holes at different positions are corresponded to realize the function of adjusting the position of the shadowless plate, improve the applicable range of the present invention, and at the same time improve the quality of the image of the tab collected by the camera 201. A glass area for the camera 201 to collect the image of the tab is provided on the shadowless plate 3. Specifically, a square hole is formed on the shadowless plate 3, and a glass sheet is fixed in the square hole to form the glass area; a light source distributed around the glass area is provided on the side of the shadowless plate 3 facing away from the camera 201 to improve the quality of the image of the tab collected by the camera 201.

[0037] In this embodiment, a fifth air cylinder 13 for jacking up the soft-pack battery 4 and entering the collection area is provided below the collection area. The lower surface of the installation track of the speed-up line is fixedly connected with a third mounting plate. The connection between the third mounting plate and the track is a bolt connection. The fifth air cylinder 13 is fixed on the third mounting plate. A first jacking plate 1302 parallel to it is provided above the third mounting plate. A plurality of first sleeves 1301 are fixedly connected to the third mounting plate. In this embodiment, the number of the first sleeves 1301 is 4 and they are evenly distributed on the third mounting plate. A plurality of first guide rods corresponding to the first sleeves 1301 one by one are fixedly arranged on the first jacking plate 1302. The top end of the first guide rod is fixedly connected to the first jacking plate 1302, and the bottom end of the first guide rod passes through the first sleeve 1301 and extends below the third mounting plate. After the bottom plate 401 enters the first detection station, the piston of the fifth air cylinder 13 pushes the first jacking plate 1302 to move upward, and the first jacking plate 1302 pushes the bottom plate 401 to move upward, so that the soft-pack battery 4 enters the collection area, and the camera 201 collects images of the tabs on both sides of the soft-pack battery 4 and transmits them to the control unit for identification and detection.

[0038] In this embodiment, a first limit plate is fixedly connected to the end of the first guide rod extending below the third mounting plate to limit the extreme displacement of the semi-solid battery in the vertical direction.

[0039] As shown in Figure 4 the figure, the second detection mechanism includes a detector (not shown in the figure), a differential pressure detection component for detecting the differential pressure of the soft-pack battery 4, and a DCIR detection component for detecting the DCIR of the soft-pack battery 4. A second support frame 102 is fixedly connected to the rack 1, and both the differential pressure detection component and the DCIR detection component are arranged on the second support frame 102. It should be noted that in the present invention, the DCIR detection and the differential pressure detection of the soft-pack battery 4 are carried out simultaneously. The detector is a commercially available product and will not be elaborated here.

[0040] The differential pressure detection component includes two groups of relatively arranged differential pressure detection units 5. The differential pressure detection unit 5 includes a plurality of detection rods 501 corresponding to one side of the tabs in the soft-pack battery 4, and one end of the detection rod 501 can be in contact with the corresponding tab. The other end of the detection rod 501 is electrically connected to the detector. When the end of the detection rod 501 contacts the corresponding tab, the detector detects the voltage of each sheet-shaped battery cell. The detection rods 501 of each differential pressure detection unit 5 are divided into upper and lower groups, and the detection rods 501 within each group are spaced apart along the extending direction of the double-speed line to ensure that each tab is contacted by a detection rod 501. The differential pressure detection unit 5 further includes a first sliding plate 502 slidably arranged on the second support frame 102, and the first sliding plate 502 is driven by a first air cylinder 503. The detection rods 501 of this differential pressure detection unit 5 are all fixedly installed on the first sliding plate 502; a first fixing plate 505 is fixedly connected to the second support frame 102, the first air cylinder 503 is fixedly installed on the first fixing plate 505, and the first sliding plate 502 is slidably connected to the first fixing plate 505. Specifically, as shown in Figure 4 the figure, the first fixing plate 505 of the right differential pressure detection unit 5 is fixed at the upper-middle position of the second support frame 102. The first air cylinder 503 of this differential pressure detection unit 5 is installed on the first fixing plate 505 through bolts. The first sliding plate 502 is fixedly connected to the piston extending end of the first air cylinder 503, that is, the first sliding plate 502 is a vertical plate. A second mounting plate 504 is fixedly connected to the bottom of the first sliding plate 502. A plurality of connecting rods distributed along the extending direction of the double-speed line are fixedly connected to the second mounting plate 504. The detection rods 501 are fixed on the connecting rods, and there are two detection rods 501 on one connecting rod. When the right differential pressure detection unit 5 contacts the right tabs of the soft-pack battery 4, the first air cylinder 503 drives the first sliding plate 502 to slide towards the soft-pack battery 4, and then drives the detection rods 501 to slide towards the soft-pack battery 4 until the detection rods 501 are in contact with the corresponding tabs. The detector measures the voltage of each sheet-shaped battery cell; after the detection is completed, the first air cylinder 503 drives the first sliding plate 502 to slide away from the soft-pack battery 4, and then drives the detection rods 501 to separate from the corresponding tabs. The detected soft-pack battery 4 enters the next processing step.

[0041] As shown in Figure 4As shown in the figure, the specific structure of the left differential pressure detection unit 5 is that the first fixing plate 505 of the left differential pressure detection unit 5 is fixed to the top of the second support frame 102. A sliding seat driven by the first cylinder 503 is slidably arranged on the first fixing plate 505. The first sliding plate 502 is slidably connected to the sliding seat and is driven by the sixth cylinder to move the first sliding plate 502 up and down. A second mounting plate 504 is fixedly connected to the bottom of the first sliding plate 502. A plurality of connecting rods distributed along the extending direction of the double-speed line are fixedly connected to the second mounting plate 504. The detection rod 501 is fixed to the connecting rod, and there are two detection rods 501 on one connecting rod. When the left differential pressure detection unit 5 contacts the left tab of the soft-pack battery 4, the sixth cylinder drives the first sliding plate 502 to slide down to the required position. At the same time, the first cylinder 503 drives the sliding seat to slide towards the soft-pack battery 4, thereby driving the first sliding plate 502 to slide towards the semi-fixed battery until the detection rod 501 contacts the left tab of the soft-pack battery 4 correspondingly. After both detection rods 501 on both sides contact the tabs on both sides of the soft-pack battery 4 correspondingly, detection is carried out. After the detection is completed, the first cylinder 503 drives the sliding seat to slide away from the soft-pack battery 4, separating the detection rod 501 from the corresponding tab.

[0042] The DCIR detection assembly includes two groups of DCIR detection units 6 corresponding to the two electrodes 11 (positive electrode and negative electrode) of the soft-pack battery 4 respectively. The DCIR detection unit 6 includes a detection head 12 for connecting to the positive or negative electrode of the soft-pack battery 4. The two detection heads 12 are electrically connected to the detector. After the detection head 12 contacts the corresponding electrode 11, the detector performs DCIR detection on the soft-pack battery 4. The DCIR detection unit 6 further includes a second fixing plate 601 for mounting the detection head 12. The second fixing plate 601 can be driven by the second cylinder 604 to move up and down, and when the detection head 12 moves up and down with the second fixing plate 601, it can be connected to or separated from the positive or negative electrode of the soft-pack battery 4. A third fixing plate is fixedly connected in parallel below the second fixing plate 601. The detection head 12 is fixed to the third fixing plate, and the top end of the detection head 12 is located between the third fixing plate and the second fixing plate 601 for electrical connection with the transmission line. The bottom end of the detection head 12 passes through the second fixing plate 601 and is located below it for contacting the electrode 11 of the soft-pack battery 4.

[0043] To avoid the detection head 12 from crushing the semi-fixed battery electrode 11, a connecting plate 602 fixedly connected to the piston of the second cylinder 604 is provided above the second fixing plate 601, and a plurality of springs 603 are arranged between the connecting plate 602 and the second fixing plate 601. One end of the spring 603 is fixedly connected to the connecting plate 602, and the other end of the spring 603 is connected to the second fixing plate 601. Specifically, two slide bars perpendicular to the second fixing plate 601 are fixedly connected to both ends of the second fixing plate 601. Slide holes are formed in the connecting plate 602. The top ends of the slide bars extend into the slide holes and the slide bars can slide along the slide holes. The spring 603 is sleeved on the part of the slide bar located between the second fixing plate 601 and the connecting plate 602. After the soft-pack battery 4 is in the detection position, the second cylinder 604 drives the connecting plate 602 to move downward, thereby driving the second fixing plate 601 and the detection head 12 to move downward. When the bottom end of the detection head 12 contacts the electrode 11 of the soft-pack battery 4, the second cylinder 604 continues to move downward. At this time, the spring 603 is compressed, and the restoring elastic force of the spring 603 will push the detection head 12 into close contact with the electrode 11 of the soft-pack battery 4, improving the detection accuracy. At the same time, it avoids the situation that the detection head 12 fails to move into place for detection and moves over-position to damage the electrode 11.

[0044] In this embodiment, a support plate is fixedly connected to the first slide plate 502. When the first slide plate 502 moves to the position where the detection rod 501 contacts the corresponding tab, the support plate is located below the electrode 11 of the soft-pack battery 4 and contacts the lower surface of the electrode 11, playing a role in supporting the electrode 11 and avoiding damage to the electrode 11 caused by excessive pressure of the detection head 12 on the electrode 11, that is, playing a role in protecting the electrode 11.

[0045] There is a third cylinder 14 installed on the rack 1 between the two DCIR detection units 6. Above the third cylinder 14, there is a top plate 9. In this embodiment, a fourth mounting plate is fixedly connected to the lower part of the double-speed line mounting track of the rack 1, and the third cylinder 14 is fixedly installed on the fourth mounting plate; the top plate 9 is located above the fourth mounting plate and perpendicular to the piston axis of the third cylinder 14. A second sleeve 1401 is fixedly connected to the fourth fixing plate, and a second guide rod 1402 is slidably arranged in the second sleeve 1401. The top end of the second guide rod 1402 extends out of the second sleeve 1401 and is fixedly connected to the top plate 9. The third cylinder 14 pushes the top plate 9 upward, thereby driving the soft-pack battery 4 located above it upward. In this embodiment, the bottom end of the second guide rod 1402 passes through the second sleeve 1401 and extends out and is fixedly connected to a limiting plate for limiting the extreme displacement of the soft-pack battery 4. After the soft-pack battery 4 moves to the second detection station, the third cylinder 14 pushes the top plate 9 upward, thereby driving the soft-pack battery 4 upward to the detection position. The differential pressure detection component and the DCIR detection component detect the soft-pack battery 4. After the detection is completed, the piston of the third cylinder 14 retracts, and the soft-pack battery 4 descends to the initial position and is transmitted to the next processing station through the transmission mechanism for processing.

[0046] During the differential pressure detection and DCIR detection of the soft-pack battery 4, sparks are likely to be generated at the contact part between the detection rod 501 and the tab. Therefore, several fourth cylinders 902 for pushing the soft-pack battery 4 away from the top plate 9 are arranged on the top plate 9, and several rollers 901 are rotatably arranged on the top plate 9. The axis of the roller 901 is parallel to the extension direction of the double-speed line. In this embodiment, the number of the fourth cylinders 902 is two. A water tank 7 is arranged on one side of the rack 1, and a second cylinder 604 for pushing the soft-pack battery 4 away from the top plate 9 into the water tank 7 is arranged on the other side of the rack 1. As Figure 4 shown, when a spark appears in the soft-pack battery 4, the second cylinder 604 drives the detection head 12 upward, and the first cylinder 503 located on the left side of the soft-pack battery 4 drives the first slide plate 502 away from the soft-pack battery 4. At the same time, the sixth cylinder drives the second slide plate upward to avoid the soft-pack battery 4 so that it can smoothly enter the water tank 7; then, the fourth cylinder 902 jacks up the soft-pack battery 4, and the second cylinder 604 located on the right side of the soft-pack battery 4 pushes the soft-pack battery 4 into the water tank 7, improving the safety of the detection equipment.

[0047] In the present invention, a positioning scanner 8 is provided in front of the first detection station. A scan code is provided on the bottom plate 401 for positioning the soft-pack battery 4 on the transmission mechanism 103. Meanwhile, a positioning assembly 15 distributed along the extension direction of the double-speed line is provided on the frame 1. The positioning assembly 15 includes a positioning cylinder 1507 fixedly installed on the frame 1. A fixed seat 1506 is fixedly connected below the installation track of the double-speed line. The positioning cylinder 1507 is fixedly installed on the fixed seat 1506. The top end of the piston of the positioning cylinder 1507 is fixedly connected with a base 1505. A first swing wheel 1501 and a second swing wheel 1503 are rotatably arranged on the base 1505. A vertical plate 1502 is provided on the first swing wheel 1501, and the vertical plate 1502 is fixedly connected with the outer side wall of the first swing wheel 1501. A horizontal plate 1504 is provided on the second swing wheel 1503, and the horizontal plate 1504 is fixedly connected with the outer side wall of the second swing wheel 1503. A receiving groove for receiving the vertical plate 1502 is formed on the bottom plate 401. When the soft-pack battery 4 is being conveyed, the positioning assembly 15 is located below the bottom plate 401 to ensure the smooth passage of the soft-pack battery 4. When the positioning scanner scans that the bottom plate 401 enters the first detection station, the transmission mechanism pauses working. The positioning cylinder 1507 pushes the base 1505 to move upward. The vertical plate 1502 enters the receiving groove, and the horizontal plate 1504 contacts the lower surface of the bottom plate 401. At this time, the third cylinder 14 and the fifth cylinder 13 lift the corresponding soft-pack battery 4 into the detection position. In the present invention, when the bottom plate 401 is misaligned due to inertia, during the upward movement of the base 1505, the vertical plate 1502 will deflect and enter the receiving groove. And as the vertical plate 1502 enters the receiving groove, the first swing wheel 1501 will push the bottom plate 401 to correct its position, thereby ensuring the accuracy of the detection.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A soft-pack battery detection device, the soft-pack battery (4) comprising a plurality of sheet-shaped battery cells, characterized in that: The detection device includes a transmission mechanism (103) disposed on a frame (1) and used for transmitting soft-pack batteries (4). Along the transmission direction of the soft-pack batteries (4) on the frame (1), a first detection mechanism (2) and a second detection mechanism are sequentially arranged. The first detection mechanism (2) includes two cameras (201) symmetrically disposed on the frame (1) and used for collecting images of the tabs of the soft-pack batteries (4), and transmits the collected images to a control unit. The second detection mechanism includes a detector, a differential pressure detection component for performing differential pressure detection on the soft-pack batteries (4), and a DCIR detection component for performing DCIR detection on the soft-pack batteries (4). The differential pressure detection component includes two groups of oppositely arranged differential pressure detection units (5). The differential pressure detection unit (5) includes a plurality of detection rods (501) corresponding to the tabs of the sheet-shaped battery cells. One end of the detection rod (501) can contact the corresponding tab, and the other end is electrically connected to the detector. The DCIR detection component includes two groups of DCIR detection units (6) respectively corresponding to the two electrodes (11) of the soft-pack battery (4). The DCIR detection unit (6) includes a detection head (12) for connecting to the electrode (11) of the soft-pack battery (4). Both detection heads (12) are electrically connected to the detector.

2. The soft-pack battery detection device according to claim 1, wherein: A first support frame (101) is fixedly connected to the frame (1), and a first mounting plate (202) for mounting the camera (201) is disposed on the first support frame (101).

3. The soft-pack battery detection device according to claim 2, wherein: Mounting frames (203) are disposed at both ends of the first mounting plate (202). The mounting frames (203) can slide along a direction perpendicular to the sliding direction of the soft-pack battery (4) and can be fixed. The camera (201) is fixedly disposed on the mounting frame (203).

4. The soft-pack battery detection device according to claim 1, wherein: A second support frame (102) is fixedly connected to the frame (1). Both two differential pressure detection units (5) and two DCIR detection units (6) are disposed on the second support frame (102).

5. The soft-pack battery detection device according to claim 4, wherein: The differential pressure detection unit (5) further includes a first slide plate (502) slidably disposed on the second support frame (102), and the first slide plate (502) is driven by a first cylinder (503). The detection rods (501) of this differential pressure detection unit (5) are all fixedly installed on the first slide plate (502).

6. The soft-pack battery detection device according to claim 5, characterized in that: A first fixing plate (505) is fixedly connected to the second support frame (102). The first cylinder (503) is fixedly installed on the first fixing plate (505), and the first slide plate (502) is slidably connected to the first fixing plate (505).

7. The soft-pack battery detection device according to claim 4, wherein: The DCIR detection unit (6) further includes a second fixing plate (601) for mounting the detection head (12). The second fixing plate (601) can move up and down driven by a second cylinder (604). The detection head (12) moves up and down with the second fixing plate (601) and can connect to or disconnect from the electrode (11) of the soft-pack battery (4).

8. The soft-pack battery detection device according to claim 7, wherein: Above the second fixing plate (601), there is a connecting plate (602) fixedly connected to the piston of the second cylinder (604), and several springs (603) are arranged between the connecting plate (602) and the second fixing plate (601). One end of the spring (603) is fixedly connected to the connecting plate (602), and the other end of the spring (603) is connected to the second fixing plate (601).

9. A soft-pack battery detection device according to claim 1, characterized in that: A third cylinder (14) mounted on the frame (1) is arranged between the two DCIR detection units (6). Above the third cylinder (14), there is a top plate (9). The third cylinder (14) pushes the top plate (9) to move upward, thereby driving the soft-pack battery (4) located above it to move upward.

10. A soft-pack battery detection device according to claim 9, characterized in that: Several fourth cylinders (902) for pushing the soft-pack battery (4) away from the top plate (9) are arranged on the top plate (9). A water tank (7) is arranged on one side of the frame (1), and a second cylinder (604) for pushing the soft-pack battery (4) away from the top plate (9) into the water tank (7) is arranged on the other side of the frame (1).

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