Blanking and rechecking method and mechanism for battery OCV test

Abstract

The invention provides a battery OCV test blanking and reinspection mechanism, relates to the technical field of battery detection, and solves the problems of yield loss, low manual reinspection efficiency and insufficient automation degree caused by mistaken elimination of a traditional battery detection line. A mechanical gripper on the carrying truss is integrated with a reinspection probe and is used for simultaneously carrying out battery carrying and OCV reinspection operation, and the mechanical gripper horizontally moves through a moving track and drives a gripper body to ascend and descend through a lifting air cylinder; the first discharging and conveying equipment is positioned below the carrying truss and is used for receiving and conveying the batteries which are qualified after reinspection; and the second discharging conveying equipment is in butt joint with the output end of the feeding belt conveyor, is obliquely arranged and is used for conveying the batteries which are unqualified after being rechecked. According to the invention, full-process automation of blanking and reinspection after the OCV test of the battery is realized, the detection efficiency and the automation level of a production line are remarkably improved, and the labor cost and the production loss are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery detection, in particular to a battery OCV test discharging and rechecking method and mechanism. BACKGROUND

[0002] At present, in the field of battery manufacturing and battery detection, the detection mechanism in the production line directly removes the defective products out of the production line without taking any compensation measures. When a batch of defective products is produced, it will have a huge impact on the yield. Batch misremoval leads to yield reduction and increases production cost. Manual rechecking of misremoved batteries is inefficient and increases labor cost. Traditional equipment cannot realize automatic rechecking, affecting the degree of automation of the production line. SUMMARY

[0003] Therefore, the present application provides a battery OCV test discharging and rechecking mechanism to solve the problem of no rechecking of batteries.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme: a battery OCV test discharging and rechecking mechanism, comprising:

[0005] A feeding belt conveyor is used for placing and transporting batteries.

[0006] A carrying truss is arranged above the feeding belt conveyor, and a mechanical gripper is arranged on the carrying truss, the mechanical gripper is provided with a rechecking probe, and the mechanical gripper is used for carrying and rechecking the batteries.

[0007] A first discharging conveying device is arranged on one side of the feeding belt conveyor and below the carrying truss, and is used for placing and transporting qualified batteries.

[0008] A second discharging conveying device is arranged in the output direction of the feeding belt conveyor and is arranged in butt joint with the feeding belt conveyor.

[0009] Preferably, the carrying truss is further provided with a stand, a cross beam and a moving track, the stand is provided with two groups of stand arranged symmetrically on opposite sides of the feeding belt conveyor, the cross beam is fixed at the top of the stand at both ends, the mechanical gripper is slidably connected with the moving track, and the moving track is used for horizontal movement of the mechanical gripper.

[0010] Preferably, the mechanical gripper is provided with a lifting cylinder and a gripper body, and the gripper body is arranged at the output end of the lifting cylinder.

[0011] Preferably, the mechanical gripper is provided with two groups.

[0012] Preferably, the feeding belt frame is provided with no less than 16 battery placing bins, and each of the battery placing bins is horizontally symmetrically arranged.

[0013] Preferably, the input end of the feeding belt is provided with a blocking device.

[0014] Preferably, the blocking device is provided with a top plate, a bottom plate, a blocking rod and a cylinder, the top plate and the bottom plate are arranged in parallel, the output end of the cylinder is connected through the bottom plate and the top plate, and the blocking rod is arranged on both sides of the cylinder and connected through the bottom plate and the top plate.

[0015] Preferably, the second blanking conveying device is arranged to be inclined at an angle with the ground.

[0016] The above technical solutions are adopted in the present application, and the present application has at least the following beneficial effects:

[0017] The present application realizes synchronous operation of battery carrying and re-inspection by integrating the mechanical gripper of the re-inspection probe, solves the yield loss problem of the traditional production line caused by mis-rejection by combining with the double-channel blanking design, realizes full-process automation, significantly reduces the artificial re-inspection cost, improves the detection precision and production line efficiency, and finally achieves the core target of cost reduction and efficiency improvement.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 is a structural schematic diagram provided by the embodiment of the present application;

[0021] Figure 2 is a structural schematic diagram of a feeding belt machine provided by the embodiment of the present application;

[0022] Figure 3 is a flowchart provided by the embodiment of the present application;

[0023] As shown in the figure, 1, feeding belt conveyor; 11, battery placing bin; 12, blocking device; 121, top plate; 122, blocking rod; 123, bottom plate; 124, air cylinder; 2, carrying truss; 21, mechanical gripper; 22, vertical column; 23, cross beam; 24, moving track; 211, re-inspection probe; 212, lifting air cylinder; 213, gripper body; 3, first discharging conveying device; 4, second discharging conveying device. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] The specific embodiments of the present application provide a battery OCV test discharging and re-inspection mechanism, combined with the accompanying drawings Figures 1-2 As shown in the figure, mainly including feeding belt conveyor 1, carrying truss 2, first discharging conveying device 3 and second discharging conveying device 4, wherein,

[0026] The side of the feeding belt conveyor 1 is provided with the first discharging conveying device 3, the carrying truss 2 is arranged above the feeding belt conveyor 1 and the first discharging conveying device 3, the output end of the feeding belt conveyor 1 is provided with the second discharging conveying device 4, and the second discharging conveying device 4 is arranged in butt joint with the feeding belt conveyor 1; after the OCV detection of the battery is completed, the feeding belt conveyor 1 discharges a group of batteries to the discharging position, in this embodiment, the group of batteries is set to 16 batteries, the discharging position is arranged below the carrying truss 2, the carrying truss 2 is provided with the mechanical gripper 21, the mechanical gripper 21 is provided with the re-inspection probe 211, the group of batteries is re-inspected through the re-inspection probe 211, and the re-inspection result is transmitted to the system for executing the next operation; if the battery is a good product after re-inspection, the battery is carried to the first discharging conveying device 3 through the mechanical gripper 21, if the battery is a defective product after re-inspection, the mechanical gripper 21 does not carry; after the re-inspection of all the batteries is completed, the feeding belt conveyor 1 pushes the defective battery to the second discharging conveying device 4 to complete the discharging of the defective battery.

[0027] Further, the carrying truss 2 is provided with a stand column 22 and a cross beam 23. In the embodiment, the stand column 22 is provided with two symmetrical stand columns arranged at two ends of the feeding belt conveyor 1 and fixed to the ground to support. The two ends of the cross beam 23 are fixedly arranged at the top ends of the two stand columns 22, so that the cross beam 23 is arranged in parallel with the ground. A horizontal moving track 24 is arranged on the cross beam 23. In the embodiment, the mechanical gripper 21 is provided with a moving base. A long straight rack is fixedly arranged on one side of the cross beam 23 of the moving track 24. One or more driving gears are arranged on the moving base of the mechanical gripper 21 and driven by a motor. The motor rotates the driving gear. The gear is engaged with the fixed rack. When the gear rotates, the gear will “roll” along the rack because the rack is fixed, thereby driving the moving base of the whole mechanical gripper 21 to move along the track direction.

[0028] Further, the mechanical gripper 21 is further provided with a lifting cylinder 212 and a gripper body 213. The lifting cylinder 212 is fixedly arranged on the moving base. The output end of the lifting cylinder 212 is provided with the gripper body 213. The output direction of the lifting cylinder 212 is a vertical direction, which is used to drive the gripper body 213 to move in the vertical direction, so that the gripper body 213 can grasp the battery.

[0029] Further, in the embodiment, the mechanical gripper 21 is provided with two groups. The linkage of the two groups of mechanical grippers 21 can improve the re-inspection efficiency.

[0030] Further, the re-inspection probe 211 is arranged on the side of the gripper body 213 and does not affect the opening and closing of the gripper body 213. The re-inspection probe 211 is arranged in two vertical downward directions. The distance between the two re-inspection probes 211 is consistent with the distance between the positive and negative poles of the battery. The mechanical gripper 21 moves horizontally along the moving track 24 to above the battery to be re-inspected. The lifting cylinder 212 is lowered to make the re-inspection probe 211 contact the positive and negative poles of the battery to be re-inspected for re-inspection, and upload the detection result to the system.

[0031] Further, the feeding belt machine 1 is provided with a battery placing bin 11 and a blocking device 12, wherein 16 battery placing bin positions are arranged, and in this embodiment, the number of batteries to be re-inspected is 16 for a group, and each position is arranged in parallel and symmetrically; the blocking device 12 is arranged at the outer front end of the battery placing bin 11, and is used to separate the front and rear groups of batteries to be re-inspected; the blocking device 12 is provided with a top plate 121, a blocking rod 122, a bottom plate 123 and a pneumatic cylinder 124, wherein the length of the top plate 121 and the bottom plate 123 is consistent with the transverse length of the 16 battery placing bins 11, the bottom plate 123 is slightly lower than the bottom end of the battery placing bin 11, and the bottom plate 123 is fixed in the feeding belt machine 1, the top plate 121 is arranged in parallel and symmetrically above the bottom plate 123, the pneumatic cylinder 124 is arranged below the bottom plate 123, and the output end of the pneumatic cylinder 124 is connected and fixed through the bottom plate 123 and below the top plate 121, and the blocking rod 122 is arranged on both sides of the pneumatic cylinder 124 in a symmetrical manner, and is fixedly connected through the bottom plate 123 and below the top plate 121; when the pneumatic cylinder 124 is contracted to the lowest position, the blocking rod 122 and the top plate 121 are moved downward, the bottom surface of the top plate 121 is in contact with the top surface of the bottom plate 123, at this time, the top surface of the top plate 121 and the bottom surface of the battery placing bin 1 are in the same plane, so that the rear group of batteries to be re-inspected can be transported to the battery placing bin 11 without obstruction; when the pneumatic cylinder 124 rises to the highest position, the blocking rod 122 and the top plate 121 are moved upward, and the top plate 121 and the plurality of blocking rods 122 can block the transportation of the rear group of batteries to be re-inspected into the battery placing bin 11.

[0032] Further, the second discharging conveying device 4 is arranged at an angle with the ground, and the high-end of the second discharging conveying device 4 is arranged in abutment with the output end of the feeding belt machine 1, and the defective batteries output from the feeding belt machine 1 are conveyed to the input end of the second discharging conveying device 4, and since the second discharging conveying device 4 is arranged at an angle, the defective batteries can be quickly transported by gravity.

[0033] As shown in Figure 3 A method for discharging and re-inspecting battery OCV, specifically as follows:

[0034] The re-inspection algorithm is as follows:

[0035] The standard open circuit voltage of the battery and the factory time and test time of the battery have the following functional relationship, which is different according to the characteristics of the battery, and is usually fitted by the battery manufacturer through test data:

[0036]

[0037] The factory time t0 of the battery can be obtained by reading the battery two-dimensional code, and the test time t1 can be obtained by reading the time of the control system.

[0038] The actual voltage of the battery at the standard temperature needs to be obtained by temperature compensation of the measured voltage, and the compensation calculation method is as follows:

[0039]

[0040] Wherein, is the standard temperature voltage value of the battery; is the measured voltage value; : ambient temperature at the time of measurement; : standard temperature; : temperature coefficient at the standard temperature (the temperature coefficient is an inherent characteristic parameter of the measuring instrument).

[0041] The open circuit voltage detection of the battery is realized by judging the error value of the actual voltage of the battery at the standard temperature and the standard open circuit voltage of the battery

[0042]

[0043] Wherein, the initial detection error value is , and the re-detection error value is When the initial detection error value and the re-detection error value are different, the control system determines that the OCV detection of the battery is abnormal, and the driving system eliminates the battery, and when a certain number of batteries appear continuously, the maintenance personnel is informed to check whether the measurement equipment and the line are abnormal, so as to avoid batch mis-detection caused by abnormal measurement equipment and line.

[0044] The working principle of the embodiment is as follows:

[0045] The cylinder 124 of the blocking device 12 of the feeding belt conveyor 1 is lowered, so that the top plate 121 and the blocking rod 122 of the blocking device 12 are lowered, and the first group of batteries to be re-detected enter the battery placing bin 11, and then the cylinder 124 is raised to drive the top plate 121 and the blocking rod 122 of the blocking device 12 to rise, so that the re-detected batteries are blocked and enter the battery placing bin 11;

[0046] The mechanical gripper 21 of the carrying truss 2 moves to the upper part of the battery to be re-detected through the moving track 24, and the re-detection probe 211 and the gripper main body 213 are lowered through the lifting cylinder 212. The re-detection probe 211 contacts the positive and negative electrodes of the battery to be re-detected to perform re-detection and upload the detection result to the control system. The control system analyzes the detection result to determine whether the battery is a good product. If it is a good product, the gripper main body 213 grasps the good battery and transports the good battery to the first discharging conveying device 3. If it is a defective product, the mechanical gripper 21 does not perform further operation, and only performs the re-detection battery and the transportation of the good product;

[0047] ​When all the batteries to be rechecked are checked, only the defective batteries are left in the battery placing bin 11 of the feeding belt conveyor 1, and the feeding belt conveyor 1 outputs the defective batteries to the second discharging conveying device 4, and the defective batteries are uniformly received by gravity at the second discharging conveying device 4.

[0048] After the overall rechecking, classification and transportation of the first group of batteries are completed, the rechecking of the next group of batteries is performed.

[0049] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions described in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A mechanism for battery OCV testing, blanking and rechecking, characterized in that, The utility model relates to a kind of battery OCV test unloading and rechecking mechanism, including: Feeding belt conveyor (1) for the placement and transportation of battery; Carrying truss (2) is arranged above the feeding belt conveyor (1), and mechanical gripper (21) is arranged on the carrying truss (2), the mechanical gripper (21) is provided with rechecking probe (211), and the mechanical gripper (21) is used for carrying and rechecking of the battery; First unloading conveying equipment (3) is arranged on the side of the feeding belt conveyor (1), below the carrying truss (2), for the placement and transportation of qualified battery; Second unloading conveying equipment (4) is arranged in the output end direction of the feeding belt conveyor (1), and is arranged in butt joint with the feeding belt conveyor (1).

2. The battery OCV test unloading and rechecking mechanism according to claim 1, wherein: The carrying truss (2) is further provided with a stand (22), a cross beam (23) and a moving track (24), the stand (22) is provided with two groups and is symmetrically arranged on the opposite sides of the feeding belt conveyor (1), the two ends of the cross beam (23) are respectively fixed on the top of the stand (22), and the mechanical gripper (21) is slidably connected with the moving track (24).

3. The battery OCV test unloading and rechecking mechanism according to claim 2, wherein: The mechanical gripper (21) is provided with a lifting cylinder (212) and a gripper body (213), the gripper body (213) is arranged on the output end of the lifting cylinder (212), and the mechanical gripper (21) is provided with a moving base, which is used for connecting the lifting cylinder (212) and the moving track (24).

4. The battery OCV test unloading and rechecking mechanism according to claim 3, wherein: The mechanical gripper (21) is provided with two groups.

5. The battery OCV test unloading and rechecking mechanism according to claim 1, wherein: The feeding belt conveyor (1) is provided with not less than 16 battery placement cavities (11), and each battery placement cavity (11) is horizontally symmetrically arranged.

6. The battery OCV test unloading and rechecking mechanism according to claim 5, wherein: The input end of the feeding belt (1) is provided with a blocking device (12).

7. The battery OCV test unloading and rechecking mechanism according to claim 6, wherein: The blocking device (12) is provided with a top plate (121), a blocking rod (122), a bottom plate (123) and a cylinder (124), the top plate (121) and the bottom plate (123) are arranged in parallel, the output end of the cylinder (124) is connected through the bottom plate (123) and the top plate (121), and the blocking rod (122) is arranged on the two sides of the cylinder (124) and is connected through the bottom plate (123) and the top plate (121).

8. The battery OCV test unloading and rechecking mechanism according to claim 1, wherein: The second blank conveying device (4) is arranged to be inclined at an angle with the ground.

9. The method of battery OCV testing, trimming and retesting of claim 1, wherein, The steps of the method include: The feeding belt conveyor (1) receives the batteries after OCV testing for re-inspection; The mechanical gripper (21) arranged on the carrying truss (2) is adjusted and moved to above the battery to be re-inspected, the re-inspection probe (211) of the mechanical gripper (21) is connected to the positive and negative electrodes of the battery to be re-inspected for detection, the detection result is transmitted to the control system, the control system judges the detection result and determines whether the battery to be re-inspected is a good product or a defective product; If it is a good product, the mechanical gripper (21) transports the battery to the first blank conveying device (3); If it is a defective product, the mechanical gripper (21) does not transport the battery, and after all the batteries are re-inspected, the feeding belt conveyor (1) transports the defective battery to the second blank conveying device (4).

10. The method of claim 9, wherein the battery OCV test is a battery OCV test for a battery having a battery capacity of 1000 mAh or more. The re-inspection judgment needs to judge the error value of the actual voltage of the battery at the standard temperature and the standard open circuit voltage of the battery , the The calculation formula is: wherein is an error value, is a standard open circuit voltage of the battery, is an actual voltage of the battery at a standard temperature.

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