Lithium ion battery detection module and automatic testing machine

Abstract

The application discloses a lithium ion battery detection module and an automatic testing machine, and relates to the technical field of detection equipment, wherein the lithium ion battery detection module comprises a fixing seat, a testing mechanism, a visual detection mechanism and a positioning mechanism, a placing plate is arranged on the fixing seat, and a plurality of placing grooves for placing lithium ion batteries are formed in the placing plate; the testing mechanism comprises first and second testing assemblies which are oppositely arranged on the fixing seat and are respectively provided with first and second testing pieces, the first testing piece is retractable relative to the second testing piece; the visual detection mechanism is arranged at the upper end of the fixing seat; the positioning mechanism is arranged at the lower end of the fixing seat and penetrates through the fixing seat to be arranged in the placing groove; the positioning mechanism is provided with a plurality of groups corresponding to the plurality of placing grooves; and the first and second testing pieces form two independent electrical testing channels. The first and second testing pieces are arranged to detect the probe in a double-channel mode, so that the precision of the lithium ion battery during testing is effectively improved, and the replacement of the probe is reduced.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery testing technology, and in particular to a lithium-ion battery testing module and an automatic testing machine. Background Technology

[0002] Lithium-ion batteries have highly concentrated energy; internal short circuits, overcharging, over-discharging, or damage can lead to thermal runaway, causing fires or even explosions. Testing can identify fatal defects such as internal micro-short circuits, poor electrode welding, and insulation failure, eliminating safety hazards at the source and protecting consumers' lives and property. Therefore, testing lithium-ion batteries is essential.

[0003] In existing technologies, a detector with two contact probes is typically used to test lithium-ion batteries. During testing, only one side of the positive and negative electrode tabs can be detected. If the lithium-ion battery electrode tabs are not positioned correctly, the detection results of the two probes will be unstable. At the same time, the probes are prone to wear during use, resulting in inaccurate test results.

[0004] Therefore, there is an urgent need for a lithium-ion battery testing device with stable detection performance. Summary of the Invention

[0005] The main objective of this invention is to provide a lithium-ion battery testing module and an automated testing machine, which addresses the problem of unstable testing results in existing technologies.

[0006] To achieve the above objectives, the present invention proposes a lithium-ion battery testing module, including a fixing base, a placement plate on the fixing base, and a placement slot for placing lithium-ion batteries on the placement plate.

[0007] The testing mechanism includes a first testing component and a second testing component fixed on a fixed base and arranged facing each other, with the placement plate disposed between the first testing component and the second testing component.

[0008] The first test component is provided with multiple sets of retractable first test pieces, and the second test component is provided with multiple sets of retractable second test pieces accordingly; the first test component and the second test component are arranged opposite to each other, and can drive the first test piece and the second test piece to perform retractable movements in opposite directions or in opposite directions, so as to contact and electrically connect to the opposite sides of the electrode tab respectively.

[0009] A visual inspection mechanism is installed on the upper end of the fixed base and is used to photograph and determine the state of the lithium-ion battery;

[0010] A positioning mechanism is provided at the lower end of the fixed base, and its top end passes through the fixed base and is placed in the placement slot, for adjusting the placement angle of the lithium-ion battery; multiple sets of the positioning mechanism are provided corresponding to multiple placement slots;

[0011] The first test piece and the second test piece are respectively connected to two independent electrical test channels for independent testing of the opposite sides of the electrode. The first test piece and the second test piece respectively contact the electrode and generate test current, and feed back the measured signal data to the external test instrument.

[0012] In one embodiment, the first test component includes a first driving member, which is fixedly mounted on the fixed base; the output end of the first driving member is connected to a first connecting plate and is driven by the first driving member to perform linear reciprocating motion; the first test piece corresponding to the number of lithium-ion battery tabs is a group, and multiple groups of the first test pieces are fixedly installed on the side of the first connecting plate facing the placement slot; the first driving member synchronously drives the first connecting plate and all the first test pieces to move toward or away from the placement slot.

[0013] The second test component includes a second driving component, which is fixedly mounted on the fixed base. The output end of the driving component is connected to a second connecting plate and is driven by the second driving component to perform linear reciprocating motion. The second test pieces corresponding to the number of lithium-ion battery tabs are grouped together, and multiple groups of the second test pieces are fixedly installed on the side of the second connecting plate facing the placement slot. The second driving component synchronously drives the second connecting plate and all the second test pieces to move toward or away from the placement slot.

[0014] In one embodiment, the tail of the first test piece is electrically connected to an external tester via a wire, and the tail of the second test piece is also electrically connected to an external tester via a wire.

[0015] In one embodiment, the positioning mechanism includes a drive motor, a support base, a first rotating wheel, a second rotating wheel, a timing belt, and a positioning rod. The drive motor is fixed to one side of the support base, and its output shaft is drivenly connected to the first rotating wheel. The second rotating wheel is coaxially fixedly connected to the positioning rod. The first rotating wheel and the second rotating wheel are connected by a timing belt. The drive motor drives the first rotating wheel to rotate, and then drives the second rotating wheel and the positioning rod to rotate synchronously through the timing belt.

[0016] In one embodiment, the top end of the positioning rod is provided with a suction nozzle for adsorbing lithium-ion batteries; the positioning rod is a hollow rod body with a vacuum passage formed inside, the lower end of the positioning rod passes through the support base and is equipped with a rotary joint, and the lower end of the positioning rod is connected to the pipeline of the vacuum generating device through the rotary joint, and the vacuum generating device provides negative pressure to the suction nozzle through the vacuum passage.

[0017] In one embodiment, the visual inspection mechanism includes a fixed bracket, an image acquisition device, and a connecting cable. The fixed bracket is fixed to the upper end of a fixed base, and the image acquisition device is fixed to the inner side of the fixed bracket, with its acquisition direction facing one side of the placement slot. The image acquisition device is equipped with a connecting cable, which is communicatively connected to the controller of an external machine. The image acquisition device acquires images of the lithium-ion battery tabs located below it and sends the acquired position signals to the controller, which then controls the positioning mechanism to adjust the rotation angle of the lithium-ion battery.

[0018] In one embodiment, the fixed bracket is a ring bracket, which is composed of two symmetrically arranged arc-shaped bracket units. The two arc-shaped bracket units together enclose and form a mounting groove. The image acquisition device is fixed in the mounting groove, and one of the arc-shaped bracket units is fixed to the fixed base by two support legs.

[0019] In one embodiment, the second test piece is a plate-shaped contact piece, one end of which is fixed to a second connecting plate. A set of two plate-shaped contact pieces is provided, each corresponding to one of the two tabs of the lithium-ion battery. The orientation of their contact surfaces matches the side of the tabs facing the battery axis.

[0020] In one embodiment, the plate-shaped contact piece is made of copper.

[0021] This application also proposes an automatic lithium-ion battery testing machine, including the lithium-ion battery testing module as described above, as well as a machine base, a testing instrument, a transport mechanism, a handling mechanism, and a placement mechanism. The machine base is respectively provided with a placement mechanism, a handling mechanism, a transport mechanism, a testing module, and a testing instrument.

[0022] The beneficial effects of this invention are as follows: By setting up a first test piece and a second test piece to simultaneously detect the probe, and by having the first and second test pieces respectively contact the opposite sides of the positive and negative electrodes of the tab, a dual-channel, multi-contact-surface detection is formed, effectively improving the accuracy and stability of lithium-ion batteries during testing and reducing the need for probe replacement. By setting up a second test piece whose contact surface shape matches the tab, the contact area with the tab is greatly increased during testing, reducing detection errors and improving detection stability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is an overall structural diagram of the detection module provided by the present invention;

[0025] Figure 2 for Figure 1 A magnified view of local area A;

[0026] Figure 3 An exploded view of the detection module structure provided by this invention;

[0027] Figure 4 for Figure 3 A magnified view of local area B;

[0028] Figure 5 This is a schematic diagram of the overall structure of the automatic testing machine provided by the present invention;

[0029] Figure 6 for Figure 5 A magnified view of local area C.

[0030] Explanation of icon numbers:

[0031] 1000, Detection module; 100, Fixing base; 101, Placement plate; 102, Placement slot; 110, Lithium-ion battery; 111, Tab; 200, Testing mechanism; 210, First testing component; 211, First driving component; 212, First connecting plate; 213, First test piece; 220, Second testing component; 221, Second driving component; 222, Second connecting plate; 223, Second test piece; 300, Positioning Mechanism; 310, Support base; 320, Drive motor; 321, First rotating wheel; 322, Synchronous belt; 323, Second rotating wheel; 330, Positioning rod; 331, Suction nozzle; 332, Rotary joint; 400, Vision inspection mechanism; 410, Ring bracket; 420, Image acquisition device; 430, Connecting line; 2000, Machine base; 3000, Handling mechanism; 4000, Area to be inspected; 5000, Good product placement area.

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] This invention proposes a lithium-ion battery detection module.

[0037] Please see Figures 1 to 4In one embodiment of the present invention, the lithium-ion battery testing module of the present invention includes: a fixing base 100, a testing mechanism 200, a visual inspection mechanism 400, and a positioning mechanism 300. The fixing base 100 is provided with a placement plate 101, and the placement plate 101 has a placement slot 102 for placing a lithium-ion battery 110. The testing mechanism 200 includes a first testing component 210 and a second testing component 220 fixed to the fixing base 100 and arranged facing each other. The placement plate 101 is disposed between the first testing component 210 and the second testing component 220. The first testing component 210 is provided with multiple sets of retractable first testing elements 213, and the second testing component 220 is correspondingly provided with multiple sets of retractable second testing elements 223. The first testing component 210 and the second testing component 220 are opposite to each other. The device is configured to drive the first test piece 213 and the second test piece 223 to extend or retract in opposite directions, so as to contact and electrically connect to the opposite sides of the tab 111 respectively; the visual inspection mechanism 400 is set at the upper end of the fixed base 100 for image detection of the state of the lithium-ion battery 110; the positioning mechanism 300 is set at the lower end of the fixed base 100, and its top end passes through the fixed base 100 and is placed in the placement slot 102 for adjusting the placement angle of the lithium-ion battery; the first test piece 213 and the second test piece 223 are respectively connected to two independent electrical test channels for independent detection of the opposite sides of the tab 111. The first test piece 213 and the second test piece 223 contact the tab 111 respectively and emit test current, and feed back the measured signal data to the external test instrument respectively.

[0038] In this embodiment, the fixing base 100 is a horizontally placed fixing plate, which is fixed by fixing legs on both sides of the lower end to form a complete fixing base 100; the positioning mechanism 300 is disposed below the fixing plate, and a groove is provided in the fixing plate. When the placement plate 101 is placed on the fixing plate of the fixing base 100, the placement groove 102 corresponds to the groove on the fixing plate. The upper end of the positioning mechanism 300 is placed in the placement groove 102 through the groove and is adsorbed and connected to the lithium-ion battery 110 in the placement groove 102.

[0039] like Figures 1 to 4As shown, the lithium-ion battery 110 is placed in the placement slot 102 on the placement plate 101. The upper vision detection mechanism 400 acquires images of the current placement state of the lithium-ion battery 110 and determines whether the position of the electrode 111 is in the detection position. If not, a signal is uploaded to the positioning mechanism 300, which adsorbs the lithium-ion battery 110 and rotates until the vision detection mechanism 400 detects that the electrode 111 of the lithium-ion battery 110 is in the detection area 4000 and stops rotating. When all the tabs 111 of the lithium-ion batteries 110 in the placement slot 102 are within the testing area 4000, the testing mechanism 200 is activated. At this time, the first testing component 210 and the second testing component 220 are activated simultaneously. The first testing component 210 controls the extension of the first testing element 213, and the second testing component 220 controls the extension of the second testing element 223. At this time, the first testing component 210 and the second testing component 220 extend towards each other until they abut against the tabs 111 of the lithium-ion batteries 110, at which point they stop extending. At this time, the second testing element 223 abuts against the side of the lithium-ion battery 110 with tabs 111 facing the axis of the lithium-ion battery 110, and the first testing element 213 abuts against the side of the lithium-ion battery 110 with tabs 111 away from the axis of the lithium-ion battery 110, and the testing begins. At this time, the dual-channel testing of the first testing component 210 and the second testing component 220 can be completed.

[0040] Furthermore, since there are multiple placement slots 102, multiple sets of the first test piece 213 and the second test piece 223 are provided corresponding to the placement slots 102, and multiple sets of positioning mechanisms 300 are also provided accordingly. When the lithium-ion battery 110 is placed, the positioning mechanism 300 can rotate and position the lithium-ion battery 110 in each placement slot 102 respectively. After positioning is completed, the testing mechanism 200 can simultaneously perform synchronous dual-channel detection on the lithium-ion battery 110 in each placement slot 102.

[0041] Furthermore, the first test component 210 includes a first drive component 211, which is fixedly mounted on the fixed base 100. The output end of the first drive component 211 is connected to a first connecting plate 212, and is driven by the first drive component 211 to perform linear reciprocating motion. The first test components 213 corresponding to the number of tabs 111 of the lithium-ion battery 110 are grouped together, and multiple groups of first test components 213 are fixedly installed on the side of the first connecting plate 212 facing the placement slot 102. The first drive component 211 synchronously drives the first connecting plate 212 and all the first test components 213 to move toward or away from the placement slot 102.

[0042] The second test component 220 includes a second drive component 221, which is fixedly mounted on the fixed base 100. The output end of the drive component is connected to a second connecting plate 222, which is driven by the second drive component 221 to perform linear reciprocating motion. The number of second test components 223 corresponding to the number of tabs 111 of the lithium-ion battery 110 is a group, and multiple groups of second test components 223 are fixedly installed on the side of the second connecting plate 222 facing the placement slot 102. The second drive component 221 synchronously drives the second connecting plate 222 and all the second test components 223 to move toward or away from the placement slot 102.

[0043] When the tab 111 of the lithium-ion battery 110 is in the test position, the first test component 210 and the second test component 220 are activated synchronously. At this time, the output end of the first drive component 211 extends towards the placement slot 102. Since the first connecting plate 212 is connected to the output end of the first drive component 211, the first test component 213 is fixedly installed on the first connecting plate 212 towards the placement slot 102. Therefore, when the output end of the first drive component 211 moves towards the placement slot 102, the first connecting plate 212 and the first test component 213 also move towards the placement slot 102 synchronously.

[0044] When the second test component 220 is activated, the output end of the first drive component 211 extends towards the placement slot 102. Since the first connecting plate 212 is connected to the output end of the first drive component 211, the first test component 213 is fixedly mounted on the first connecting plate 212 towards the placement slot 102. Therefore, when the output end of the first drive component 211 moves towards the placement slot 102, the first connecting plate 212 and the first test component 213 also move towards the placement slot 102 synchronously.

[0045] Furthermore, the tail of the first test piece 213 is electrically connected to an external tester via a wire, and the tail of the second test piece 223 is also electrically connected to an external tester via a wire. When the first test piece 213 and the second test piece 223 are in contact with the tab 111, the test signal is transmitted to the tester via the wires at the tails of the first test piece 213 and the second test piece 223. The tester then detects the signal of the lithium battery, completing the dual-channel detection.

[0046] Furthermore, the positioning mechanism 300 includes a drive motor 320, a support base 310, a first rotating wheel 321, a second rotating wheel 323, a timing belt 322, and a positioning rod 330. Optionally, the drive motor 320 is fixed on one side of the support base 310, and its output shaft is drivenly connected to the first rotating wheel 321. The second rotating wheel 323 is coaxially fixedly connected to the positioning rod 330. The first rotating wheel 321 and the second rotating wheel 323 are rotatably connected through the timing belt 322. The drive motor 320 drives the first rotating wheel 321 to rotate, and then drives the second rotating wheel 323 and the positioning rod 330 to rotate synchronously through the timing belt 322. When the lithium-ion battery 110 is placed in each of the placement slots 102 of the placement plate 101, the visual inspection mechanism 400 detects that the tab 111 is not in the position to be inspected and transmits the signal to the positioning mechanism 300. At this time, the drive motor 320 starts and its output drives the first rotating wheel 321 to rotate. The first rotating wheel 321 drives the second rotating wheel 323 to rotate through the synchronous belt 322. Since the second rotating wheel 323 is coaxially fixedly connected to the positioning rod 330, when the second rotating wheel 323 rotates, the positioning rod 330 also rotates to control the rotation of the lithium-ion battery 110 at the top of the positioning rod 330 until the tab 111 of the lithium-ion battery 110 is in the position to be inspected, and then stops rotating to complete the positioning of the lithium-ion battery 110.

[0047] In one embodiment, the top of the positioning rod 330 is provided with a suction nozzle 331 for adsorbing the lithium-ion battery 110. Optionally, the positioning rod 330 is a hollow rod body with a vacuum passage formed inside. The lower end of the positioning rod 330 passes through the support base 310 and is equipped with a rotary joint 332. The lower end of the positioning rod 330 is connected to the pipeline of the vacuum generating device through the rotary joint 332. The vacuum generating device provides negative pressure to the suction nozzle 331 through the vacuum passage. In use, when the positioning device is activated, the external vacuum generating device provides negative pressure to the suction nozzle 331 through the vacuum passage, forming a tight connection with the lithium-ion battery 110 at the upper end of the suction nozzle 331, so as to accurately rotate and position the lithium-ion battery 110 when the positioning rod 330 rotates.

[0048] Furthermore, the visual inspection mechanism 400 includes a fixed bracket, an image acquisition device 420, and a connecting cable 430. Optionally, the fixed bracket is fixed to the upper end of the fixed base 100, the image acquisition device 420 is fixed to the inner side of the fixed bracket, and its acquisition direction is towards one side of the placement slot 102. The image acquisition device 420 is provided with a connecting cable 430, which is communicatively connected to the controller of the external machine tool 2000. The image acquisition device 420 acquires images of the electrode 111 of the lithium-ion battery 110 located below it and sends the acquired position signal to the controller, which controls the positioning mechanism 300 to adjust the rotation angle of the lithium-ion battery 110.

[0049] In this application, when installing the visual inspection mechanism 400, the fixing bracket is first fixed to the upper end of the fixing base 100. After fixing the fixing bracket, the image acquisition device 420 is set inside the fixing bracket, with the acquisition direction of the image fixing device corresponding to the placement slot 102. After installation, the connecting cable 430 is connected to the external controller for communication. The visual inspection mechanism 400 collects the placement status of the tabs 111 of the lithium-ion battery 110 in the placement slot 102 by looking downwards, and sends the collected information to the controller. The controller determines whether the position of the lithium-ion battery needs to be adjusted. When adjustment is needed, a signal is sent to the positioning mechanism 300. The positioning mechanism 300 adjusts the rotation position of the lithium-ion battery 110 until the visual inspection mechanism 400 collects the current position of the tabs 111 of the lithium-ion battery 110 in the test area, and then sends a signal to the controller. The controller controls the positioning mechanism 300 to stop rotating.

[0050] In one embodiment, the image acquisition device 420 is configured as a ring-shaped image acquisition device 420, and the fixed bracket is a ring-shaped bracket 410. The ring-shaped bracket 410 consists of two symmetrically arranged arc-shaped bracket units, which together enclose a mounting groove. The image acquisition device 420 is fixed in the mounting groove, and one arc-shaped bracket unit is fixed to the fixed base 100 by two support legs. Since the electrode 111 of the lithium battery may stop at any angle on the circumference when it rotates on the positioning rod 330, using a single ordinary camera has a limited field of view and may result in blind spots. If the initial position of the electrode 111 is exactly outside the camera's field of view, the system cannot identify it. By configuring the image acquisition device 420 as a ring, its lens focuses inward on a common central area, ensuring that the electrode 111 on its side is always within the field of view of the ring camera, regardless of how the lithium battery rotates. This facilitates full-circumference, uninterrupted real-time monitoring, effectively improving positioning speed and efficiency.

[0051] In one embodiment, the second test piece 223 is a plate-shaped contact piece. Optionally, the plate-shaped contact piece is fixed to the first connecting plate 212 by bolts. Two plate-shaped contact pieces are provided, corresponding to the two tabs 111 of the lithium-ion battery 110, respectively, with their contact surfaces facing the side of the tab 111 facing the battery axis. The plate-shaped contact piece forms a large contact area with the inner side of the tab 111, significantly increasing the conductive area and resulting in extremely low and very stable contact resistance. This ensures smooth flow of the test current, reduces heat generation, and improves the accuracy and repeatability of the test data. Furthermore, since the surface of the tab 111 may have tiny bumps, scratches, or oxide layers, if the probe tip touches a pit or oxide point, it can lead to contact failure or inaccurate test results. The plate-shaped contact piece, with its contact surface area much larger than these defects, can easily cover these uneven areas, ensuring a good conductive path at all times and greatly improving the reliability of the test.

[0052] In one embodiment, the plate-shaped contact piece of the second test piece 223 is made of copper. Preferably, the copper is pure copper. Because pure copper has extremely high electrical and thermal conductivity, it ensures low-loss transmission of the test signal and effectively suppresses temperature rise during the test process; at the same time, its excellent flexibility allows the contact piece to fit more tightly with the surface of the lithium battery tab 111, increasing the effective contact area and enabling stable resistance detection; the dense oxide film formed on the surface of pure copper effectively prevents further corrosion, thereby ensuring the long-term stability and service life of the testing device.

[0053] The lithium-ion battery detection module proposed in this application operates as follows: A lithium-ion battery 110 is placed in the placement slot 102 of the placement plate 101. The battery 110 is then held in place by the suction nozzle 331. The image acquisition device 420 at its upper end captures the current placement status of the battery. The image acquisition device 420 transmits the placement status of each lithium-ion battery 110 in the battery slot to the controller, which determines whether its position needs adjustment. When adjustment is required, the controller sends a signal to the positioning mechanism 300, which drives the first rotating wheel 321 to rotate via the drive motor 320. Wheel 321 drives the second rotating wheel 323 to rotate via synchronous belt 322. The rotation of the second rotating wheel 323 causes the positioning shaft to rotate as well. Since the lower end of the lithium-ion battery 110 is in an adsorption connection and fixed state with the suction nozzle 331 at the upper end of the positioning rod 330, the lithium-ion battery 110 also rotates with the positioning rod 330 until the tab 111 of the lithium-ion battery 110 is in the part to be detected. At this point, the upper image acquisition device 420 sends a signal to the controller, and the controller sends a stop signal to the corresponding positioning mechanism 300 to stop the rotation, thus completing the positioning of the lithium-ion battery 110. When all the tabs 111 of the lithium-ion battery 110 are in the test position, the testing mechanism 200 starts testing. At this time, the first driving member 211 synchronously drives the first connecting plate 212 and all test probe groups to move toward the placement slot 102, and the second driving member 221 synchronously drives the second connecting plate 222 and all test probe groups to move toward the placement slot 102. At this time, the first test piece 213 and the second test piece 223 respectively contact the two sides of the tabs 111. The external tester emits a test current to test the lithium-ion battery 110. The first test piece 213 and the second test piece 223 transmit the test signal to the tester through the wire at the tail, so as to know whether the lithium-ion battery 110 in each placement slot 102 is good.

[0054] See Figure 5 and Figure 6This application also proposes an automatic lithium-ion battery testing machine, including the lithium-ion battery 110 testing module 1000 of the above embodiment, as well as a machine base 2000, a testing instrument, a conveying mechanism 3000, a testing area 4000, and a good product placement area 5000. The machine base 2000 is respectively equipped with a testing instrument, a conveying mechanism 3000, a testing area 4000, a good product placement area 5000, and a battery testing module 1000. In use, the lithium-ion battery 110 is placed in the testing area 4000, and the conveying mechanism 3000 transports the lithium-ion battery 110 in the placement mechanism to the lithium-ion battery 110 testing module 1000. The lithium-ion battery 110 testing module 1000 tests the battery, and the tester determines its status. The conveying mechanism removes the defective products, and the tested good products are placed in the good product placement area 5000, completing the testing and placement process.

[0055] The specific structure of the detection module 1000 is as described in the above embodiments. Since the detection module 1000 of this automatic testing machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0056] The automatic lithium-ion battery testing machine in this embodiment automatically loads and unloads materials through the conveying mechanism 3000, and performs automatic testing of lithium-ion batteries 110 by combining the lithium-ion battery 110 testing module 1000 and the tester. During the testing process, no manual intervention is required to automatically transport and test the materials. After the testing is completed, the tested lithium-ion batteries 110 are taken out through the good product placement area 5000, thus achieving the effect of automatic testing.

[0057] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A lithium-ion battery detection module, characterized in that, include: A fixing base (100) is provided with a placement plate (101), and the placement plate (101) is provided with a plurality of placement slots (102) for placing lithium-ion batteries (110). The testing mechanism (200) includes a first testing component (210) and a second testing component (220) fixed on a fixed base (100) and arranged opposite to each other, and the placement plate (101) is disposed between the first testing component (210) and the second testing component (220); The first test component (210) is provided with multiple sets of retractable first test pieces (213), and the second test component (220) is provided with multiple sets of retractable second test pieces (223). The first test component (210) and the second test component (220) are arranged opposite to each other and can drive the first test piece (213) and the second test piece (223) to perform retractable movements in opposite directions or in opposite directions, so as to contact and electrically connect to the opposite sides of the tab (111) respectively. The second test piece (223) is a plate-shaped contact piece, one end of which is fixed on the second connecting plate (222). The second test pieces (223) corresponding to the number of tabs (111) of the lithium-ion battery (110) are in a set. There are two plate-shaped contact pieces in a set, which correspond to the two tabs (111) of the lithium-ion battery (110) respectively. The orientation of their contact surfaces is consistent with the side of the tab (111) facing the battery axis. A visual inspection mechanism (400) is disposed on the upper end of the fixed base (100) for performing image inspection on the lithium-ion battery (110) in the placement slot (102); A positioning mechanism (300) is provided at the lower end of the fixed base (100), and its top end passes through the fixed base (100) and is placed in the placement slot (102) for adjusting the placement angle of the lithium-ion battery; the positioning mechanism (300) is provided in multiple sets corresponding to multiple placement slots (102); The positioning mechanism (300) includes a drive motor (320), a support base (310), a first rotating wheel (321), a second rotating wheel (323), a timing belt (322), and a positioning rod (330). The drive motor (320) is fixed to one side of the support base (310), and its output shaft is drivenly connected to the first rotating wheel (321). The second rotating wheel (323) is coaxially fixedly connected to the positioning rod (330). The first rotating wheel (321) and the second rotating wheel (323) are rotatably connected through the timing belt (322). The drive motor (320) drives the first rotating wheel (321) to rotate, thereby... The second rotating wheel (323) and the positioning rod (330) are driven to rotate synchronously by the synchronous belt (322); the top of the positioning rod (330) is provided with a suction nozzle (331) for adsorbing lithium-ion batteries (110); the positioning rod (330) is a hollow rod body, and a vacuum passage is formed inside it. The lower end of the positioning rod (330) passes through the support base (310) and is equipped with a rotary joint (332). The lower end of the positioning rod (330) is connected to the pipeline of the vacuum generating device through the rotary joint (332). The vacuum generating device provides negative pressure to the suction nozzle (331) through the vacuum passage. The first test piece (213) and the second test piece (223) are respectively connected to two independent electrical test channels for independent testing of the opposite sides of the tab (111). The first test piece (213) and the second test piece (223) respectively contact the tab (111) and emit test current, and feed back the measured signal data to the external test instrument.

2. The lithium-ion battery testing module as described in claim 1, characterized in that, The first test component (210) includes a first drive member (211), which is fixedly mounted on the fixed base (100). The output end of the first drive member (211) is connected to a first connecting plate (212), which is driven by the first drive member (211) to perform linear reciprocating motion. The first test pieces (213) corresponding to the number of tabs (111) of the lithium-ion battery (110) are grouped together, and multiple groups of the first test pieces (213) are fixedly mounted on the side of the first connecting plate (212) facing the placement slot (102). The first drive member (211) synchronously drives the first connecting plate (212) and all the first test pieces (213) to move toward or away from the placement slot (102). The second test component (220) includes a second drive member (221), which is fixedly mounted on the fixed base (100). The output end of the drive member is connected to a second connecting plate (222), which is driven by the second drive member (221) to perform linear reciprocating motion. Multiple sets of the second test pieces (223) are fixedly mounted on the side of the second connecting plate (222) facing the placement slot (102). The second drive member (221) synchronously drives the second connecting plate (222) and all the second test pieces (223) to move toward or away from the placement slot (102).

3. The lithium-ion battery testing module as described in claim 2, characterized in that, The tail of the first test piece (213) is electrically connected to an external tester via a wire, and the tail of the second test piece (223) is electrically connected to an external tester via a wire.

4. The lithium-ion battery testing module as described in claim 1, characterized in that, The visual inspection mechanism (400) includes a fixed bracket, an image acquisition device (420), and a connecting line (430). The fixed bracket is fixed to the upper end of the fixed base (100). The image acquisition device (420) is fixed to the inner side of the fixed bracket, and its acquisition direction is towards one side of the placement slot (102). The image acquisition device (420) is provided with a connecting line (430), and the connecting line (430) is communicatively connected to the controller of the external machine (2000). The image acquisition device (420) acquires images of the electrode (111) of the lithium-ion battery (110) located below it and sends the acquired position signal to the controller. The controller controls the positioning mechanism (300) to adjust the rotation angle of the lithium-ion battery (110).

5. The lithium-ion battery testing module as described in claim 4, characterized in that, The fixed bracket is a ring bracket (410), which is composed of two symmetrically arranged arc-shaped bracket units. The two arc-shaped bracket units together enclose and form an installation groove. The image acquisition device (420) is fixed in the installation groove. One of the arc-shaped bracket units is fixed to the fixed base (100) by two support legs.

6. The lithium-ion battery testing module as described in claim 1, characterized in that, The plate-shaped contact piece is made of copper.

7. An automatic testing machine for lithium-ion batteries, characterized in that, The system includes a lithium-ion battery testing module (1000) as described in any one of claims 1 to 6, as well as a machine (2000), a tester, a conveying mechanism (3000), a testing area (4000), and a good product placement area (5000), wherein the machine (2000) is respectively provided with a tester, a conveying mechanism (3000), a testing area (4000), a good product placement area (5000), and a testing module (1000).

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