Shadowless shooting mechanism for soft package battery appearance detection

Abstract

The utility model relates to a soft -packaged battery appearance detection is with shadowless shooting mechanism relates to soft -packaged battery detection technical field, including detection platform, be provided with the transmission assembly and two symmetrical distribution's camera for conveying soft -packaged battery on detection platform, form the collection area between two cameras, and the camera is used for gathering the tab image of soft -packaged battery and will it be transmitted to control unit, two cameras are close to the side of collection area all are provided with shadowless board, the glass area that is provided with for the camera gathering tab image on shadowless board, and the side that shadowless board is away from the camera is provided with the light source that surrounds the glass area distribution, transmission assembly includes two mutually parallel speed lines and is used for holding the clamping unit of soft -packaged battery, and clamping unit can slide to the collection area below along the speed line direction, and through the first cylinder below the collection area is promoted to enter the collection area, after soft -packaged battery processing is completed, the invention is in line and carries out the post -welding detection of tab.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soft package battery detection, in particular to a shadowless shooting mechanism for soft package battery shape detection. BACKGROUND

[0002] In the process of continuous development in the field of new energy, soft package batteries gradually become the focus of battery technology research and application due to their significant advantages in energy density and safety compared to traditional liquid batteries. The electrolyte system of soft package batteries is between liquid and full solid, retaining the high ionic conductivity of liquid electrolyte and improving mechanical stability and thermal safety through the introduction of solid components. As a key component for connecting the internal cell and external circuit of the battery, the welding quality of the tab directly affects the conductivity, thermal management reliability and long-term safety of the battery. However, the unique high-viscosity electrolyte and heterogeneous interface characteristics of soft package batteries make it prone to false welding and overwelding during tab welding, so it is necessary to detect the welding quality of the tab of soft package batteries.

[0003] In the prior art, off-line sampling is often used for post-welding detection of the tab of soft package batteries, which is time-consuming and labor-intensive, and cannot match the production speed of soft package batteries, which may cause defective batteries to flow into subsequent processes. SUMMARY

[0004] To solve the problem that the tab of soft package batteries cannot be detected online in the prior art, the present application provides a shadowless shooting mechanism for soft package battery shape detection, which can detect the post-welding of the tab of soft package batteries online after processing, match the production speed of soft package batteries, improve the production efficiency of soft package batteries, and avoid defective batteries flowing into subsequent processes.

[0005] To achieve the above purpose, the specific scheme adopted by the present application is as follows: a shadowless shooting mechanism for soft package battery shape detection, comprising a detection table, a conveying assembly for conveying soft package batteries and two symmetrically distributed cameras are arranged on the detection table, a collection area is formed between the two cameras, the cameras are used to collect the tab image of the soft package battery and transmit it to the control unit; each of the two cameras is provided with a shadowless plate on the side close to the collection area, the shadowless plate is provided with a glass area for the camera to collect the tab image, and the side of the shadowless plate away from the camera is provided with a light source distributed around the glass area; the conveying assembly comprises two parallel speed lines and a clamping unit for clamping the soft package battery, the clamping unit can slide to the lower side of the collection area along the direction of the speed line, and enter the collection area by being pushed by the first cylinder located below the collection area, so that the soft package battery is located between the two shadowless plates.

[0006] As an optimized solution for the above-mentioned shadowless imaging mechanism for inspecting the shape of soft-pack batteries: the inspection table is fixedly equipped with a support frame, the support frame is equipped with a mounting plate, and the camera is installed at both ends of the mounting plate.

[0007] As an alternative optimization of the above-mentioned shadowless imaging mechanism for inspecting the shape of a soft-pack battery: the support frame is provided with a first slide rail extending along the conveying direction of the soft-pack battery, and the mounting plate is provided with a first slider that can slide along the first slide rail and can be fixed.

[0008] As another optimized solution for the above-mentioned shadowless shooting mechanism for soft-pack battery shape inspection: both ends of the mounting plate are provided with connecting plates, and the camera is fixed on the connecting plates.

[0009] As another optimized solution of the above-mentioned shadowless imaging mechanism for the shape inspection of soft-pack batteries: the clamping unit includes a base plate, a fixed clamping plate fixedly connected to the base plate, and a movable clamping plate slidably connected to the base plate, and the movable clamping plate is driven to reciprocate by a lead screw.

[0010] As another optimized solution of the above-mentioned shadowless imaging mechanism for inspecting the shape of soft-pack batteries: the clamping unit also includes side plates located at both ends of the fixed clamping plate and perpendicular to the base plate, and the side plates are provided with multiple clamping grooves for positioning the soft-pack battery return plate.

[0011] As another optimized solution for the above-mentioned shadowless imaging mechanism for inspecting the shape of a soft-pack battery: the side plate can slide vertically, an inclined hole is provided on the side plate, and a sliding shaft is slidably provided on the bottom plate. The end of the sliding shaft extends into the inclined hole, and the sliding shaft drives the side plate to slide vertically during the sliding process.

[0012] As an alternative optimization of the above-mentioned shadowless imaging mechanism for inspecting the shape of a soft-pack battery: a fixed plate is fixedly installed on the inspection platform, and the first cylinder is installed on the fixed plate.

[0013] As another optimized solution for the above-mentioned shadowless imaging mechanism for inspecting the shape of a soft-pack battery: a push plate is arranged parallel above the fixed plate, and multiple guide rods are vertically fixedly connected below the push plate. Multiple sleeves corresponding to the guide rods are fixedly arranged on the fixed plate, and the bottom ends of the guide rods extend into the sleeves.

[0014] As another optimized solution for the above-mentioned shadowless imaging mechanism for inspecting the shape of a soft-pack battery: the bottom end of the guide rod passes through the sleeve and extends out, and the bottom end of the guide rod is fixedly connected to a limiting plate.

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

[0016] 1. This invention provides a shadowless imaging mechanism for the shape inspection of pouch batteries. The pouch battery is fixed by a clamping unit and conveyed to the area below the acquisition zone via a high-speed cable. A first cylinder pushes the clamping unit to position the pouch battery between two shadowless plates. A camera captures images of both ends of the pouch battery and transmits the images to a control unit for identification. This mechanism can perform online post-weld inspection of the pouch battery tabs, improve the production efficiency of pouch batteries, and prevent defective batteries from entering subsequent processes. A light source is provided on the shadowless plates to improve image quality.

[0017] 2. In this invention, during the vertical movement of the side plate, the top plate and the soft-pack battery sheet are pressed, so that the soft-pack battery sheet passes through the gap on the return plate, and at the same time, the bent tab can be stably contacted with the return plate; and the bottom end of the return plate is inserted into the clamping groove to further stabilize the position of the return plate, the soft-pack battery sheet and the tab, and avoid the image being unclear due to the shaking of the return plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is the front view of the present invention;

[0020] Figure 3 This is a three-dimensional view of the present invention;

[0021] Figure 4 A schematic diagram of the transmission component;

[0022] Figure 5 This is a cross-sectional view of the present invention;

[0023] Figure 6 This is a structural diagram of the positioning component;

[0024] Reference numerals: 1. Support frame; 101. First slide rail; 2. Mounting plate; 201. First slider; 202. Connecting plate; 3. Camera; 4. Shadowless plate; 401. Bending part; 5. Speed ​​increase line; 6. First cylinder; 601. Piston; 602. Fixing plate; 603. Guide rod; 604. Sleeve; 605. Limiting plate; 606. Push plate; 7. Soft-pack battery; 8. Clamping unit; 801. Moving clamping plate; 802. Fixing Clamping plate, 803, second slider, 804, cover plate, 805, locking knob, 806, side plate, 9, base plate, 901, second slide rail, 902, lead screw, 903, positioning groove, 10, positioning assembly, 11, sliding shaft, 1101, linkage rod, 12, inclined hole, 14, second cylinder, 15, base, 1501, first roller, 1502, second roller, 1503, first positioning plate, 1504, second positioning plate. Detailed Implementation

[0025] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of the present invention should be understood as prior art known or should be known by those skilled in the art, such as the structure of the control unit and how the control unit recognizes images.

[0026] Example

[0027] A shadowless imaging mechanism for inspecting the shape of a pouch battery 7 is disclosed. The pouch battery 7 includes multiple sheet-like cells. The shadowless imaging mechanism includes an inspection platform, on which a conveying component for transporting the pouch battery 7 and two symmetrically distributed cameras 3 are mounted. A capture area is formed between the two cameras 3. The cameras 3 are used to capture images of the tabs of the pouch battery 7 and transmit them to a control unit. The cameras 3 are configured such that a support frame 1 is fixedly mounted on the inspection platform. The support frame 1 includes two vertical rods located on both sides of the conveying component and a horizontal rod for connecting the two vertical rods. The two ends of the horizontal rod are fixedly connected to the ends of the vertical rods by bolts. The bottom end of the vertical rod is fixedly connected to the inspection platform by bolts. A mounting plate 2 is provided on the support frame 1, and a camera 3 is mounted at both ends of the mounting plate 2. In this embodiment, in order to adjust the position of the camera 3 to accommodate pouch batteries 7 of different sizes, a first slide rail 101 extending along the conveying direction of the pouch battery 7 is provided on the support frame 1. The upper surface of the first slide rail 101 is fixedly connected to the lower surface of the horizontal rod by bolts. A reinforcing plate is fixedly connected between the first slide rail 101 and the horizontal rod to improve the connection stability between the first slide rail 101 and the horizontal rod. A first slider 201 that can slide along the first slide rail 101 and can be fixed is provided on the mounting plate 2. The lower surface of the first slider 201 is fixedly connected to the upper surface of the mounting plate 2 by bolts. The first slider 201 is located at the center of the mounting plate 2. The position of the camera 3 in the conveying direction of the pouch battery 7 is adjusted by the position of the first slider 201 on the first slide rail 101 to accommodate different pouch batteries 7 and improve the applicability of the invention. Both ends of the mounting plate 2 are provided with connecting plates 202. The camera 3 is fixed on the connecting plates 202. Specifically, the connecting plate 202 includes two vertical plates and one horizontal plate. The bottom ends of the two vertical plates are fixedly connected to the mounting plate 2 by bolts. The bottom ends of the two vertical plates are fixedly connected to the horizontal plate by bolts. The camera 3 is fixed on the horizontal plate.

[0028] Two cameras 3 each have a shadowless plate 4 mounted on the side closest to the acquisition area. The shadowless plate 4 is vertically mounted and fixed to the mounting plate 2. Specifically, the top of the shadowless plate 4 is bent at 90° to form a bent portion 401, which is fixedly connected to the mounting plate 2 by bolts. In this embodiment, the mounting plate 2 has mounting holes for the bent portion 401, which are distributed along the length of the mounting plate 2. The bent portion 401 is mounted on different mounting holes to adjust the distance between the shadowless plate 4, the camera 3, and the soft-pack battery 7 to achieve the best image acquisition effect. The shadowless plate 4 has a glass area for the camera 3 to acquire tab images. Specifically, the shadowless plate 4 has a square hole, and a glass piece is fixed in the square hole to form the glass area. A light source is arranged around the glass area on the side of the shadowless plate 4 away from the camera 3. The light source is a planar light source to improve the quality of the tab images acquired by the camera 3.

[0029] The transmission assembly includes two parallel speed-multiplying lines 5 and a clamping unit 8 for holding the soft-pack battery 7. The clamping unit 8 can slide along the speed-multiplying line 5 to below the acquisition area and be pushed into the acquisition area by the first cylinder 6 located below the acquisition area, so that the soft-pack battery 7 is located between the two shadowless plates 4.

[0030] The clamping unit 8 includes a base plate 9, a fixed clamping plate 802 fixedly connected to the base plate 9, and a movable clamping plate 801 slidably connected to the base plate 9. The base plate 9 is a rectangular plate structure, and its lower surface contacts the conveyor belt, causing the conveyor belt to drive the clamping unit 8 to move as a whole. Each of the four corners of the base plate 9 is rotatably connected to a traveling wheel, the axis of which is perpendicular to the base plate 9. When the clamping unit 8 moves, the traveling wheel rotates along the side wall of the mounting track of the speed-multiplying line. The movable clamping plate 801 is driven to reciprocate by a lead screw 902, forming an elastic clamping area between the fixed clamping plate 802 and the movable clamping plate 801. The fixed clamping plate 802 is connected to the base plate 9 by bolts. The movable clamping plate 801 is connected to the base plate 9 by two parallel second slide rails 901 fixedly connected to the base plate 9, with the extension direction of the second slide rails 901 perpendicular to the movable clamping plate 801. Two rails connected to the second slide rails are fixedly connected to the lower part of the movable clamping plate 801. The second slider 803 corresponds to 901 and can slide along the second slide rail 901. The two ends of the lead screw 902 are rotatably connected to the base plate 9 through bearing seats. A connecting block is fixedly connected below the movable clamping plate 801. The connecting block is provided with a threaded hole that cooperates with the lead screw 902. The lead screw 902 passes through the threaded hole and rotates to drive the second slider 803 to reciprocate along the second slide rail 901, thereby driving the movable clamping plate 801 to slide toward or away from the fixed clamping plate 802.

[0031] A support plate for supporting all sheet-like battery cells is provided between the fixed clamping plate 802 and the movable clamping plate 801. Multiple evenly distributed pads are provided between the support plate and the base plate 9. The pads are connected to the base plate 9 by bolts. In this embodiment, protective pads are fixedly provided on the sides of the movable clamping plate 801 and the fixed clamping plate 802 near the elastic clamping area. The protective pads are made of elastic rubber to protect the surface of the sheet-like battery cells.

[0032] The clamping unit 8 also includes side plates 806 located at both ends of the fixed clamping plate 802 and perpendicular to the base plate 9. The side plates 806 have multiple clamping slots for positioning the return plate of the soft-pack battery 7. Specifically, the side plates 806 are connected to the base plate 9 by two vertical slide rails and sliding grooves on the edge of the side plates 806. That is, the two vertical slide rails are connected to the base plate 9 by bolts. The side plates 806 have inclined holes 12. A sliding shaft 11 is slidably installed in the inclined holes 12. A wear-resistant wheel is rotatably fitted on the sliding shaft 11, and the diameter of the wear-resistant wheel is equal to the width of the inclined holes 12. The sliding shaft 11 is fixedly connected to a linkage rod 1101 that is slidably installed on the base plate 9. Specifically, one end of the linkage rod 1101 is fixedly connected to the sliding shaft 11, and the other end of the linkage rod 1101 is provided with a locking knob 805 that can fix it. When fixing multiple sheet-shaped battery cells, the staff pushes the linkage plate to drive the sliding shaft 11 to slide along the inclined hole 12, thereby driving the side plate 806 to move vertically to the required position, and tightens the locking knob 805 to fix the side plate 806.

[0033] In this embodiment, a cover plate 804 is provided at the top of the elastic clamping area, which can be fixedly connected to the fixed clamping plate 802 and the movable clamping plate 801.

[0034] A fixing plate 602 is fixedly installed on the testing platform. The fixing plate 602 is fixedly connected to the lower surface of the mounting rail of the speed-increasing line 5. The connection between the two is by bolts. The first cylinder 6 is installed on the fixing plate 602. A push plate 606 is arranged parallel above the fixed plate 602. Multiple guide rods 603 are vertically fixedly connected to the lower part of the push plate 606. Multiple sleeves 604 corresponding to the guide rods 603 are fixedly arranged on the fixed plate 602. The bottom end of the guide rod 603 extends into the sleeve 604. In this embodiment, there are four guide rods 603, which are evenly distributed on the push plate 606. The guide rods 603 are connected to the push plate 606 by bolts. The sleeves 604 are connected to the fixed plate 602 by interference fit. The top end of the sleeve 604 is located above the fixed plate 602, and the bottom end of the sleeve 604 is located below the fixed plate 602. When acquiring the image of the tab of the soft-pack battery 7, the piston 601 of the first cylinder 6 slides upward to push the push plate 606 upward. The push plate 606 contacts the bottom plate 9 and pushes the bottom plate 9 upward, thus driving the soft-pack battery 7 into the acquisition area.

[0035] The bottom end of the guide rod 603 passes through the sleeve 604 and extends out. A limiting plate 605 is fixedly connected to this end. The limiting plate 605 is connected to the end of the guide rod 603 by bolts to limit the extreme displacement of the guide rod 603.

[0036] A positioning component 10 is installed on the testing platform. The positioning component 10 is positioned as follows: Figure 5 As shown, the pouch battery 7 is conveyed from right to left to the area below the collection zone. The positioning component 10 is located on the left side of the collection zone and between the two speed-increasing lines 5. The positioning component 10 includes a second cylinder 14, with a base 15 fixedly connected to the top of the piston rod of the second cylinder 14. A first roller 1501 and a second roller 1502 are rotatably connected to the base 15. A first positioning plate 1503 is fixedly connected to the outer wall of the first roller 1501, and a second positioning plate 1504 is fixedly connected to the outer wall of the second roller 1502. A positioning groove 903 for accommodating the first positioning plate 1503 is provided on the base plate 9. When the base plate 9 is misaligned due to inertia, the first positioning plate 1503 will deflect and enter the positioning groove 903 as the base 15 rises. As the first positioning plate 1503 enters the positioning groove 903, the first roller 1501 will push the base plate 9 backward, thereby correcting its position and ensuring that the pouch battery 7 smoothly enters the collection zone.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shadowless imaging mechanism for inspecting the shape of a soft-pack battery, characterized in that: The system includes a testing platform, on which a transmission assembly for transmitting the soft-pack battery (7) and two symmetrically distributed cameras (3) are provided. A collection area is formed between the two cameras (3). The cameras (3) are used to collect images of the tabs of the soft-pack battery (7) and transmit them to the control unit. A shadowless plate (4) is provided on the side of each camera (3) near the collection area. A glass area is provided on the shadowless plate (4) for the camera (3) to collect images of the tabs. A light source is provided on the side of the shadowless plate (4) away from the camera (3) and distributed around the glass area. The transmission assembly includes two parallel speed-multiplying lines (5) and a clamping unit (8) for clamping the soft-pack battery (7). The clamping unit (8) can slide along the speed-multiplying line (5) to the bottom of the collection area and be pushed into the collection area by a first cylinder (6) located below the collection area, so that the soft-pack battery (7) is located between the two shadowless plates (4). The testing platform is fixedly equipped with a support frame (1), and a mounting plate (2) is installed on the support frame (1). The camera (3) is installed at both ends of the mounting plate (2), and the shadowless plate (4) is vertically installed and fixed on the mounting plate (2). The clamping unit (8) includes a base plate (9), a fixed clamping plate (802) fixedly connected to the base plate (9), and a movable clamping plate (801) slidably connected to the base plate (9). The movable clamping plate (801) is driven to reciprocate by a lead screw (902). A positioning assembly (10) is provided on the testing platform. The positioning assembly (10) includes a second cylinder (14). The piston rod of the second cylinder (14) is fixedly connected to a base (15). A first roller (1501) and a second roller (1502) are rotatably connected on the base (15). A first positioning plate (1503) is fixedly connected to the outer wall of the first roller (1501). A second positioning plate (1504) is fixedly connected to the outer wall of the second roller (1502). A positioning groove (903) for accommodating the first positioning plate (1503) is provided on the base plate (9). A first slide rail (101) extending along the conveying direction of the soft-pack battery (7) is provided on the support frame (1). A first slider (201) that can slide along the first slide rail (101) and can be fixed is provided on the mounting plate (2). Both ends of the mounting plate (2) are provided with connecting plates (202), and the camera (3) is fixed on the connecting plates (202).

2. The shadowless imaging mechanism for inspecting the shape of a soft-pack battery as described in claim 1, characterized in that: The clamping unit (8) also includes side plates (806) located at both ends of the fixed clamping plate (802) and perpendicular to the base plate (9). The side plates (806) are provided with multiple clamping slots for positioning the return plate of the soft pack battery (7).

3. The shadowless imaging mechanism for inspecting the shape of a soft-pack battery as described in claim 2, characterized in that: The side plate (806) can slide vertically. An inclined hole (12) is provided on the side plate (806). A sliding shaft (11) is slidably provided on the bottom plate (9). The end of the sliding shaft (11) extends into the inclined hole (12). During the sliding process, the sliding shaft (11) drives the side plate (806) to slide vertically. A linkage rod (1101) is fixedly connected to the sliding shaft (11) and is slidably provided on the bottom plate (9). One end of the linkage rod (1101) is fixedly connected to the sliding shaft (11), and the other end of the linkage rod (1101) is provided with a locking knob (805) that can fix it.

4. The shadowless imaging mechanism for inspecting the shape of a soft-pack battery as described in claim 1, characterized in that: A fixing plate (602) is fixedly installed on the testing platform, and the first cylinder (6) is installed on the fixing plate (602).

5. The shadowless imaging mechanism for inspecting the shape of a soft-pack battery as described in claim 4, characterized in that: A push plate (606) is arranged parallel above the fixed plate (602), and multiple guide rods (603) are vertically fixedly connected below the push plate (606). Multiple sleeves (604) corresponding to the guide rods (603) are fixedly arranged on the fixed plate (602), and the bottom end of the guide rod (603) extends into the sleeve (604).

6. The shadowless imaging mechanism for inspecting the shape of a soft-pack battery as described in claim 5, characterized in that: The bottom end of the guide rod (603) passes through the sleeve (604) and extends out, and the bottom end of the guide rod (603) is fixedly connected to the limiting plate (605).

Images