Ternary lithium battery production quality detection method and device

Abstract

The invention relates to the technical field of battery production, in particular to a ternary lithium battery production quality detection method and device.The ternary lithium battery production quality detection device comprises a temperature control box, a fixing rod is fixedly connected to the inner side of the temperature control box, a detection mechanism used for battery current detection is installed on the outer side of the fixing rod, and the detection mechanism comprises a second C-shaped installation plate; the inner wall of the second C-shaped mounting plate is provided with a maintenance mechanism used for preventing spontaneous combustion of a battery, the inner wall of the second C-shaped mounting plate is fixedly connected with a first mounting plate, the front end of the first mounting plate is provided with two sets of symmetrical CCD cameras, and a servo motor drives a fixed rotating shaft and a gear transmission system; a second C-shaped mounting plate drives a direct-current clamp meter to rotate, meanwhile, a battery body rotates reversely through a synchronous belt and a gear structure, 360-degree surrounding scanning of the detection ring on the outer side of the battery is achieved, a second electric telescopic rod drives an arc-shaped cleaning plate to be attached to a pole, an oxide layer is automatically removed, and contact resistance increase caused by impurities is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production devices, and particularly to a method and device for detecting the production quality of ternary lithium batteries. Background Art

[0002] As a core component in the new energy field, ternary lithium batteries are widely used in scenarios such as electric vehicles and energy storage systems due to their high energy density, long cycle life, etc. However, their production process has extremely high requirements for the reliability of electrode contact, the integrity and safety of the outer shell, and traditional methods have significant deficiencies.

[0003] Traditional detection equipment mostly adopts static single-point detection, which is difficult to perform full-surface dynamic scanning on the current distribution outside the battery, and it is difficult to control the contact gap of the detection ring due to the size difference of the batteries, easily causing deviation in the detection of contact resistance. In addition, impurities such as oxide layers and oil stains attached to the surface of the battery poles will directly affect the authenticity of the electrical performance detection data, and manual cleaning has low efficiency and poor consistency. Moreover, the application of conductive coating liquid relies on manual spraying, resulting in problems such as uneven coating and precipitation blockage, and it is difficult to meet the requirements of large-scale production. Existing equipment lacks a real-time temperature monitoring and fire warning linkage mechanism, has a slow response speed to safety hazards such as battery swelling and spontaneous combustion, and the spraying range of the fire extinguishing agent is fixed, unable to adaptively cover different-sized batteries comprehensively, resulting in safety blind spots. Therefore, we propose a method and device for detecting the production quality of ternary lithium batteries. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art, the present invention proposes a method and device for detecting the production quality of ternary lithium batteries.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A device for detecting the production quality of ternary lithium batteries, including a temperature control box, a fixed rod is fixedly connected to the inner side of the temperature control box, a detection mechanism for detecting the current of the battery is installed on the outer side of the fixed rod, the detection mechanism includes a second C-shaped mounting plate, a maintenance mechanism for preventing the battery from spontaneous combustion is installed on the inner wall of the second C-shaped mounting plate, a first mounting plate is fixedly connected to the inner wall of the second C-shaped mounting plate, two groups of symmetrically arranged CCD cameras are installed at the front end of the first mounting plate, an annular searchlight is installed at the front end of the CCD camera, two groups of symmetrically arranged circuit rods are rotatably connected to the inner wall of the temperature control box, fixing sleeves are rotatably connected to the ends of the two groups of circuit rods close to each other, a sealing ring is fixedly connected to the inner wall of the fixing sleeve, and a battery body is jointly arranged inside the two groups of fixing sleeves.

[0006] Preferably, five first gears are meshed and connected to the outer side of the second C-shaped mounting plate. A fixed rotating shaft is fixedly connected to the inner side of the first gear. Both ends of the fixed rotating shaft are rotatably connected to a first C-shaped mounting plate. The inner sides of the two first C-shaped mounting plates are fixedly connected to a fixed rod. A servo motor is installed on one side of one of the two first C-shaped mounting plates. The output shaft of the servo motor is fixedly connected to a fixed rotating shaft near the middle of one of the five fixed rotating shafts.

[0007] Preferably, a DC clamp meter is installed at the front end of the first mounting plate. Two symmetrically arranged detection rings are rotatably connected to the front end of the DC clamp meter. Two symmetrically arranged second brackets are fixedly connected to the outer wall of the DC clamp meter. A connecting rod is rotatably connected to the inner side of the second bracket through a rotating shaft. The other end of the connecting rod is rotatably connected to a first bracket through a rotating shaft. The output shafts of two first electric telescopic rods are fixedly connected to the far ends of the two first brackets. The two first electric telescopic rods are both installed on the inner side of the second C-shaped mounting plate.

[0008] Preferably, a permalloy thin strip is fixedly connected to the inner wall of the detection ring of the DC clamp meter.

[0009] Preferably, one end of a fixed rotating shaft near the middle of one of the five fixed rotating shafts is fixedly connected to a second gear. A synchronous belt is rotatably connected to the outer side of the second gear. A third gear is rotatably connected to the inner side of the synchronous belt. The inner side of the third gear is fixedly connected to one of the two fixed sleeves.

[0010] Preferably, a second electric telescopic rod is installed on the inner wall of the first C-shaped mounting plate. The output shaft of the second electric telescopic rod is fixedly connected to a first connecting plate. A coating plate is fixedly connected to the front end of the first connecting plate. Arc-shaped cleaning plates are fixedly connected to the far sides of the two coating plates. Temperature probes are installed on the near sides of the two coating plates. A soft brush is fixedly connected to the inner wall of the coating plate.

[0011] Preferably, a second mounting plate is fixedly connected to the outer side of the housing of the second electric telescopic rod. A coating liquid tank is fixedly connected to the front end of the second mounting plate. A sealing ring is arranged at the output port of the coating liquid tank. A discharge pipe is slidably connected to the inner side of the coating liquid tank. The discharge pipe penetrates through the first connecting plate on the outer side. An atomizing spray head is installed at one end of the discharge pipe. The atomizing spray head is installed on the inner side of the coating plate. A feed hole is opened in the inner part of the coating liquid tank on the outer side of the discharge pipe. The other end of the discharge pipe is rotatably connected to a fourth gear through a bracket. The fourth gear is meshed and connected to a rack. One end of the rack is fixedly connected to the coating liquid tank. Two symmetrically arranged blades are fixedly connected to both ends of the fourth gear through rotating shafts.

[0012] Preferably, the maintenance mechanism includes a third mounting plate fixedly connected to the second C-shaped mounting plate. An air pump is installed at the rear end of the third mounting plate. The input port of the air pump penetrates through the third mounting plate. The input port of the air pump is fixedly connected to an air suction pipe. The other end of the air suction pipe is fixedly connected to an adsorption box. An activated carbon coating is provided on the inner wall of the adsorption box. A stirring shaft is rotatably connected to the inside of the adsorption box.

[0013] Preferably, the output port of the air pump is fixedly connected to two symmetrically arranged exhaust pipes. The other end of the exhaust pipe is fixedly connected to a high-pressure storage tank. A fire extinguishing agent is provided inside the high-pressure storage tank. The upper end of the high-pressure storage tank is fixedly connected to a solenoid valve through a telescopic pipe. The outer sides of the two solenoid valves are jointly fixedly connected to a second connecting plate. One end of the second connecting plate is fixedly connected to the output shaft of a third electric telescopic rod. The lower end of the third electric telescopic rod is fixedly connected to the third mounting plate.

[0014] A method for using a ternary lithium battery production quality detection device, applicable to a ternary lithium battery production quality detection device in the above, includes the following steps: S1. Install the battery body between two fixed sleeves. Start the first electric telescopic rod. Drive the detection ring of the DC clamp meter to clamp the outside of the battery body through the connecting rod. Then adjust the temperature inside the temperature control box to reach the set condition. S2. Start the servo motor. The output shaft of the servo motor drives the first gear to rotate through the fixed rotating shaft, thereby driving the second C-shaped mounting plate to rotate, enabling the DC clamp meter to detect the current output situation of the battery body, and start the CCD camera to detect whether the outside of the battery body deforms under a specific environment. S3. When the battery body catches fire due to quality problems, turn off the power of the circuit rod. Start the air pump and adsorb the generated harmful gases into the adsorption box through the air suction pipe. The output airflow sprays the fire extinguishing agent in the high-pressure storage tank onto the surface of the battery body through the exhaust pipe by using the solenoid valve.

[0015] Compared with the prior art, the present invention provides a method and device for detecting the production quality of ternary lithium batteries, having the following beneficial effects: 1. The fixed rotating shaft and the gear transmission system are driven by a servo motor, enabling the second C-shaped mounting plate to drive the DC clamp meter to rotate self - adaptively. Meanwhile, the battery body rotates in the opposite direction through a synchronous belt and a gear structure, achieving a 360° circumferential scan of the outer side of the battery by the detection ring. Combining with the permalloy ribbon to enhance the magnetic field induction sensitivity, ensuring no dead angle in the current distribution detection, and improving the accuracy compared with traditional static detection. The detection ring of the DC clamp meter is driven to close by the first electric telescopic rod through a linkage mechanism, which can adaptively detect different - sized batteries tightly, avoiding detection errors caused by contact gaps. The CCD camera is equipped with a ring - shaped searchlight, and during the opposite rotation of the battery body and the detection component, it realizes the dynamic high - definition image acquisition of defects such as outer wall bulges and fissions. The mechanical transmission system ensures the uniform relative movement speed between the detection component and the battery, avoiding image blurring and improving the defect recognition accuracy rate.

[0016] 2. The second electric telescopic rod drives the arc - shaped cleaning plate to fit the pole post, automatically removing the oxide layer, oil stains and metal debris, avoiding the increase of contact resistance caused by impurities. The soft brush and the atomizing spray head are used to evenly apply the conductive coating liquid, improving the electrode conductivity and antioxidant ability, ensuring the authenticity of subsequent electrical performance test data. The coating liquid tank is equipped with a blade stirring mechanism, which automatically stirs when moving through the discharge pipe, preventing the coating liquid from precipitating and ensuring the spraying uniformity. The fixed sleeve and the sealing ring achieve non - wobbling clamping of the battery body, avoiding the misalignment of the detection ring or image acquisition deviation caused by battery displacement. The rigid transmission structure with multiple sets of gears meshing ensures the stability of the detection component during rotation.

[0017] 3. The air pump adsorbs the harmful gases generated by battery spontaneous combustion in real - time. The activated carbon coating in the adsorption box and the centrifugal force of the stirring shaft cooperate to avoid the diffusion of toxic gases. The fire extinguishing agent stored in the high - pressure storage tank, under the control of the solenoid valve, adjusts the spraying distance through the third electric telescopic rod to achieve full coverage of the battery outer wall, controlling the fire risk at the budding stage and ensuring production safety and equipment stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic cross - sectional view of the overall structure of the present invention; Figure 3 is a schematic diagram of the overall internal structure of the present invention; Figure 4 is a schematic diagram of a partial structure of the detection mechanism of the present invention Figure 1 ; Figure 5 is of the present invention Figure 4 is an enlarged schematic diagram of the structure of part A in the present invention; Figure 6 is a schematic diagram of a partial structure of the detection mechanism of the present invention Figure 2 ; Figure 7 Schematic diagram of partial structure of the detection mechanism of the present invention Figure 3 ; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure of part B in the present invention; Figure 9 Schematic diagram of partial sectional structure of the detection mechanism of the present invention Figure 1 ; Figure 10 For the present invention Figure 8 Enlarged schematic diagram of the structure of part C in the present invention; Figure 11 Schematic diagram of partial sectional structure of the detection mechanism of the present invention Figure 2 ; Figure 12 Schematic diagram of the overall structure of the maintenance mechanism of the present invention; Figure 13 Schematic diagram of the overall sectional structure of the maintenance mechanism of the present invention; Figure 14 Schematic diagram of partial structure of the maintenance mechanism of the present invention.

[0019] In the figure: 1. Temperature control box; 2. Fixed rod; 3. Detection mechanism; 31. First C-shaped mounting plate; 32. Fixed rotating shaft; 33. First gear; 34. Second C-shaped mounting plate; 35. Servo motor; 36. First mounting plate; 37. DC clamp meter; 38. Permalloy thin strip; 39. CCD camera; 310. First electric telescopic rod; 311. First bracket; 312. Connecting rod; 313. Second bracket; 314. Second gear; 315. Timing belt; 316. Third gear; 317. Second electric telescopic rod; 318. Arc-shaped cleaning plate; 319. Second mounting plate; 320. Coating liquid tank; 321. Discharge pipe; 322. Atomizing spray head; 323. Fourth gear; 324. Blade; 325. Rack; 326. First connecting plate; 327. Coating plate; 328. Soft brush; 329. Temperature probe; 4. Maintenance mechanism; 41. Third mounting plate; 42. Air pump; 43. Suction pipe; 44. Adsorption box; 45. Stirring shaft; 46. Exhaust pipe; 47. High-pressure storage tank; 48. Solenoid valve; 49. Third electric telescopic rod; 410. Second connecting plate; 5. Circuit rod; 6. Fixed sleeve; 7. Battery body; 8. Sealing ring. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Embodiment 1:

[0021] Please refer to Figure 1 - Figure 14, A quality inspection device for the production of ternary lithium batteries, including a temperature control box 1. A fixed rod 2 is fixedly connected to the inner side of the temperature control box 1. A detection mechanism 3 for detecting the current of the battery is installed on the outer side of the fixed rod 2. The detection mechanism 3 includes a second C-shaped mounting plate 34. A maintenance mechanism 4 for preventing the battery from spontaneous combustion is installed on the inner wall of the second C-shaped mounting plate 34. A first mounting plate 36 is fixedly connected to the inner wall of the second C-shaped mounting plate 34. Two groups of symmetrically arranged CCD cameras 39 are installed at the front end of the first mounting plate 36. An annular searchlight is installed at the front end of the CCD camera 39. Two groups of symmetrically arranged circuit rods 5 are rotatably connected to the inner wall of the temperature control box 1. Fixing sleeves 6 are rotatably connected to the ends of the two circuit rods 5 close to each other. A sealing ring 8 is fixedly connected to the inner wall of the fixing sleeve 6. A battery body 7 is jointly arranged inside the two fixing sleeves 6.

[0022] In this embodiment, five first gears 33 are meshed and connected to the outer side of the second C-shaped mounting plate 34. A fixed rotating shaft 32 is fixedly connected to the inner side of the first gear 33. The two ends of the fixed rotating shaft 32 are rotatably connected to a first C-shaped mounting plate 31. The inner sides of the two first C-shaped mounting plates 31 are both fixedly connected to the fixed rod 2. A servo motor 35 is installed on one side of one of the two first C-shaped mounting plates 31. The output shaft of the servo motor 35 is fixedly connected to a fixed rotating shaft 32 close to the middle among the five fixed rotating shafts 32.

[0023] Specifically, the second C-shaped mounting plate 34 realizes self-rotation through the first gears 33 meshed on the outer side, bears and drives the first mounting plate 36, the DC clamp meter 37, and the CCD camera 39 to rotate, covering the full-range detection of the battery body 7. The two ends of the first C-shaped mounting plate 31 and the fixed rotating shaft 32 of the fixed rod 2 maintain the overall structural stability through the fixed rod 2, support the servo motor 35 and the gear transmission system, and avoid shaking during the detection process. The fixed rotating shaft 32 connects the first gear 33 and the first C-shaped mounting plate 31, transmits the power of the servo motor 35, and ensures the synchronous rotation of multiple groups of gears. The servo motor 35 serves as a power source, and the output shaft drives the middle fixed rotating shaft 32 to rotate. Through the meshing of the five first gears 33 and the outer side of the second C-shaped mounting plate 34, the second C-shaped mounting plate 34 is driven to rotate self, providing rotational power for the DC clamp meter 37 and the CCD camera 39.

[0024] In this embodiment, a DC clamp meter 37 is installed at the front end of the first mounting plate 36. Two symmetrically arranged detection rings are rotatably connected to the front end of the DC clamp meter 37. Two symmetrically arranged second brackets 313 are fixedly connected to the outer wall of the DC clamp meter 37. A connecting rod 312 is rotatably connected to the inner side of the second bracket 313 through a rotating shaft. The other end of the connecting rod 312 is rotatably connected to a first bracket 311 through a rotating shaft. Output shafts of two first electric telescopic rods 310 are fixedly connected to the far ends of the two first brackets 311 away from each other. The two first electric telescopic rods 310 are both installed inside the second C-shaped mounting plate 34. The second C-shaped mounting plate 34 drives the CCD camera 39 to perform a comprehensive visual inspection of the battery outer wall through high-definition image acquisition. Combining with an image processing algorithm, surface defects are identified in real time to ensure the integrity of the battery shell. An annular searchlight is installed at the front end of the CCD camera 39 to provide uniform and shadowless illumination, ensuring sufficient light on the outer wall of the battery body 7 during detection, facilitating the CCD camera 39 to capture subtle appearance defects such as bulges and fissions.

[0025] Specifically, the DC clamp meter 37 and the detection rings are driven by the first electric telescopic rod 310 to drive the first bracket 311. Through the connecting rod 312 and the second bracket 313, the detection rings are driven to close and surround the battery body 7. The first electric telescopic rod 310 provides a linear driving force to control the opening and closing of the detection rings, ensuring that the detection rings closely fit the battery surface, adapting to the clamping and detection of batteries of different sizes. The connecting rod 312 converts the linear motion of the electric telescopic rod into the closing action of the detection rings, ensuring the stability and precision of mechanical transmission.

[0026] In this embodiment, a permalloy thin strip 38 is fixedly connected to the inner wall of the detection ring of the DC clamp meter 37.

[0027] Specifically, by utilizing the high magnetic permeability characteristic of the permalloy thin strip 38, the current distribution outside the battery is accurately detected, improving the detection sensitivity.

[0028] In this embodiment, one of the five fixed rotating shafts 32, near the middle fixed rotating shaft 32, has a second gear 314 fixedly connected to one end. The outside of the second gear 314 is rotatably connected to a timing belt 315. The inside of the timing belt 315 is rotatably connected to a third gear 316. The inside of the third gear 316 is fixedly connected to one of the two fixed sleeves 6.

[0029] Specifically, the second gear 314 and the timing belt 315 are driven by the fixed rotating shaft 32. The power is transmitted to the third gear 316 through the timing belt 315 to form a transmission system, ensuring stable power transmission. The third gear 316 drives the fixed sleeve 6 to rotate, causing the battery body 7 and the second C-shaped mounting plate 34 to rotate towards each other, achieving full coverage of current detection and improving the detection efficiency.

[0030] In this embodiment, a second electric telescopic rod 317 is installed on the inner wall of the first C-shaped mounting plate 31. The output shaft of the second electric telescopic rod 317 is fixedly connected to a first connecting plate 326. The front end of the first connecting plate 326 is fixedly connected to a coating plate 327. Arc-shaped cleaning plates 318 are fixedly connected to the sides of the two coating plates 327 away from each other. Temperature probes 329 are installed on the sides of the two coating plates 327 close to each other. A soft brush 328 is fixedly connected to the inner wall of the coating plate 327.

[0031] Specifically, the second electric telescopic rod 317 drives the first connecting plate 326 to move horizontally, driving the coating plate 327 to approach or move away from the battery body 7, realizing the fitting or separation of the soft brush 328 from the pole. The coating plate 327 and the soft brush 328 are attached to the positive and negative electrodes of the battery, and the coating liquid sprayed by the atomizing spray head 322 is evenly applied to the electrode surface, improving the conductivity and antioxidant ability of the electrode. The arc-shaped cleaning plate 318 is attached to the outside of the battery pole, removing the oxide layer, oil stain or metal debris, ensuring good electrode contact, avoiding excessive contact resistance, and the temperature probe 329 monitors the temperature change of the battery body 7 in real time. When detecting abnormal high temperature or the precursor of bulging and spontaneous combustion, power off is triggered.

[0032] In this embodiment, a second mounting plate 319 is fixedly connected to the outer side of the housing of the second electric telescopic rod 317. The front end of the second mounting plate 319 is fixedly connected to a coating liquid tank 320. A sealing ring is provided at the output port of the coating liquid tank 320. A discharge pipe 321 is slidably connected to the inside of the coating liquid tank 320. The outside of the discharge pipe 321 penetrates through the first connecting plate 326. An atomizing spray head 322 is installed at one end of the discharge pipe 321. The atomizing spray head 322 is installed inside the coating plate 327. A feed hole is provided inside the coating liquid tank 320 on the outside of the discharge pipe 321. The other end of the discharge pipe 321 is rotatably connected to a fourth gear 323 through a bracket. A rack 325 is meshed with the outside of the fourth gear 323. One end of the rack 325 is fixedly connected to the coating liquid tank 320. Two symmetrically arranged blades 324 are fixedly connected to both ends of the fourth gear 323 through a rotating shaft.

[0033] Specifically, the coating liquid tank 320 stores the conductive coating liquid and is fixed to the second electric telescopic rod 317 through the second mounting plate 319, maintaining a horizontal position to ensure stable discharging. When the discharge pipe 321 and the atomizing spray head 322 move with the coating plate 327, the discharge pipe 321 slides inside the coating liquid tank 320, sucks the coating liquid through the feed hole, and evenly sprays it onto the battery electrode surface through the atomizing spray head 322. When the discharge pipe 321 moves, it drives the fourth gear 323 to mesh with the fixed rack 325, causing the blades 324 to rotate, stirring the liquid in the coating liquid tank 320 to prevent precipitation and ensuring the uniformity of the coating liquid. After the liquid in the coating liquid tank 320 is used up, it is replenished through a hose after the machine stops.

[0034] In this embodiment, the maintenance mechanism 4 includes a third mounting plate 41 fixedly connected to the second C-shaped mounting plate 34. An air pump 42 is installed at the rear end of the third mounting plate 41. The input port of the air pump 42 penetrates through the third mounting plate 41. A suction pipe 43 is fixedly connected to the input port of the air pump 42. The other end of the suction pipe 43 is fixedly connected to an adsorption box 44. An activated carbon coating is provided on the inner wall of the adsorption box 44. A stirring shaft 45 is rotatably connected inside the adsorption box 44.

[0035] Specifically, the air pump 42 provides the adsorption and jet power. The input end surrounds and adsorbs the harmful gases generated by the spontaneous combustion of the battery body 7 through the suction pipe 43. The output end discharges the processed air flow into the high-pressure storage tank 47 or releases the fire extinguishing agent through the exhaust pipe 46. The activated carbon coating on the inner wall of the adsorption box 44 adsorbs the impurities in the harmful gases. The air flow drives the stirring shaft 45 to rotate, and the centrifugal force is used to throw the particulate impurities towards the box wall, enhancing the adsorption effect of the activated carbon and purifying the gas. The third mounting plate 41 fixes the air pump 42 and the adsorption box 44, and moves along with the second C-shaped mounting plate 34 to ensure that the maintenance mechanism 4 approaches or moves away from the battery synchronously with the detection component, realizing real-time protection.

[0036] In this embodiment, two groups of symmetric exhaust pipes 46 are fixedly connected to the output port of the air pump 42. The other end of the exhaust pipe 46 is fixedly connected to a high-pressure storage tank 47. A fire extinguishing agent is provided inside the high-pressure storage tank 47. The upper end of the high-pressure storage tank 47 is fixedly connected to a solenoid valve 48 through a telescopic pipe. The outer sides of the two solenoid valves 48 are jointly fixedly connected to a second connecting plate 410. One end of the second connecting plate 410 is fixedly connected to the output shaft of a third electric telescopic rod 49. The lower end of the third electric telescopic rod 49 is fixedly connected to the third mounting plate 41.

[0037] Specifically, the high-pressure storage tank 47 stores the fire extinguishing agent, is connected to the output end of the air pump 42 through the exhaust pipe 46, and sprays the fire extinguishing agent by using the air flow pressure provided by the air pump 42. The solenoid valve 48 is opened after receiving the abnormal signal of the temperature probe 329 to control the spraying timing of the fire extinguishing agent; it is connected to the high-pressure storage tank 47 through the telescopic pipe and can adjust its position along with the third electric telescopic rod 49. The third electric telescopic rod 49 and the second connecting plate 410 adjust the distance between the solenoid valve 48 and the battery body 7 to ensure that the fire extinguishing agent fully covers the outer wall of the battery, inhibits the spread of the fire, and improves the accuracy of safety protection.

[0038] Embodiment 2: A method for using a ternary lithium battery production quality detection device, applicable to a ternary lithium battery production quality detection device as described above, includes the following steps: S1, Install the battery body 7 between two fixed sleeves 6, start the first electric telescopic rod 310, drive the detection ring of the DC clamp meter 37 to clamp the outside of the battery body 7 through the connecting rod 312, and then adjust the temperature inside the temperature control box 1 to reach the set condition; S2. Start the servo motor 35. The output shaft of the servo motor 35 drives the first gear 33 to rotate through the fixed rotating shaft 32, thereby driving the second C-shaped mounting plate 34 to rotate, enabling the DC clamp meter 37 to detect the current output condition of the battery body 7, and starting the CCD camera 39 to detect whether the outer side of the battery body 7 is deformed under specific environments; S3. When the battery body 7 catches fire due to quality problems, turn off the power supply of the circuit rod 5, start the air pump 42, and adsorb the generated harmful gases into the adsorption box 44 through the suction pipe 43. The output airflow sprays the fire extinguishing agent in the high-pressure storage tank 47 onto the surface of the battery body 7 through the exhaust pipe 46 by using the solenoid valve 48.

[0039] Working principle: When in use, install the battery body 7 inside the fixed sleeve 6, and then the fixed sleeve 6 clamps the battery body 7 through the sealing ring 8. Start the first electric telescopic rod 310. The output shaft of the first electric telescopic rod 310 drives the connecting rod 312 to move through the first bracket 311. The connecting rod 312 drives the detection ring of the DC clamp meter 37 to move by driving the second bracket 313, so that the two groups of detection rings close and surround the battery body 7. Then start the second electric telescopic rod 317. The output shaft of the second electric telescopic rod 317 drives the first connecting plate 326 to move. The first connecting plate 326 drives the coating plate 327 to move, so that the soft brush 328 fits the positive and negative poles of the battery body 7. The first connecting plate 326 drives the arc-shaped cleaning plate 318 to fit the pole posts of the battery body 7. When the coating plate 327 moves, it drives the atomizing spray head 322 to move. The atomizing spray head 322 drives the discharge pipe 321 to slide inside the coating liquid tank 320. The discharge pipe 321 drives the fourth gear 323 to move. The fourth gear 323 meshes with the rack 325, so that when the fourth gear 323 moves, it drives the blade 324 to rotate to stir the coating liquid. The coating liquid tank 320 is kept horizontal with the second electric telescopic rod 317 through the second mounting plate 319. Start the servo motor 35. The servo motor 35 drives the fixed rotating shaft 32 to rotate in the first C-shaped mounting plate 31. The first C-shaped mounting plate 31 maintains its own stability through the fixed rod 2. The fixed rotating shaft 32 drives the first gear 33 to rotate. Multiple groups of first gears 33 clamp the second C-shaped mounting plate 34 and mesh with the second C-shaped mounting plate 34, so that the second C-shaped mounting plate 34 rotates. The second C-shaped mounting plate 34 drives the DC clamp meter 37 to rotate through the first mounting plate 36, and comprehensively and accurately detects the current on the outer side of the battery body 7 through the permalloy thin strip 38. The CCD camera 39 comprehensively detects the outer wall of the battery body 7 under the illumination of the annular searchlight to check whether there are phenomena such as bulging and fission on the outer side of the battery body 7. The fixed rotating shaft 32 drives the second gear 314 to rotate. The second gear 314 drives the third gear 316 to rotate through the synchronous belt 315. The third gear 316 drives the battery body 7 to rotate through the fixed sleeve 6. The battery body 7 rotates in the opposite direction to the second C-shaped mounting plate 34, thereby improving the detection efficiency of the DC clamp meter 37 and the CCD camera 39. When the battery body 7 rotates, start the atomizing spray head 322 to spray, and comprehensively apply the coating liquid on the poles of the battery body 7 through the soft brush 328 to improve the conductivity, and clean the oxide layer, oil stain or metal debris on the outside of the pole posts through the arc-shaped cleaning plate 318; When the battery body 7 bulges and catches fire spontaneously, the temperature change of the battery body 7 is detected by the temperature probe 329, the power supplies of the temperature control box 1 and the circuit rod 5 are turned off, and the air pump 42 is started. The second C-shaped mounting plate 34 drives the other components of the maintenance mechanism 4 to move through the third mounting plate 41. The input port of the air pump 42 adsorbs the harmful gases generated by the battery body 7 in a surrounding manner through the suction pipe 43. The air flow drives the stirring shaft 45 to rotate in the adsorption box 44. The centrifugal force generated during rotation moves the particles in the harmful gases in the adsorption box 44 outward, and then they are adsorbed by the activated carbon coating in the adsorption box 44. The output port of the air pump 42 discharges the air flow into the high-pressure storage tank 47 through the exhaust pipe 46. Then, the solenoid valve 48 is opened by the signal of the air flow, and the fire extinguishing agent in the high-pressure storage tank 47 is sprayed on the outer wall of the battery body 7 by using the air flow. The output shaft of the third electric telescopic rod 49 adjusts the distance between the solenoid valve 48 and the battery body 7 through the second connecting plate 410, so that the solenoid valve 48 can spray the outer wall of the battery body 7 comprehensively, avoiding the occurrence of fire.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quality inspection device for the production of ternary lithium batteries, comprising a temperature control box (1), characterized in that: A fixed rod (2) is fixedly connected to the inner side of the temperature control box (1). A detection mechanism (3) for detecting the battery current is installed on the outer side of the fixed rod (2). The detection mechanism (3) includes a second C-shaped mounting plate (34). A maintenance mechanism (4) for preventing the battery from spontaneous combustion is installed on the inner wall of the second C-shaped mounting plate (34). A first mounting plate (36) is fixedly connected to the inner wall of the second C-shaped mounting plate (34). Two groups of symmetrically arranged CCD cameras (39) are installed at the front end of the first mounting plate (36). An annular searchlight is installed at the front end of the CCD camera (39). Two groups of symmetrically arranged fixed sleeves (6) are rotatably connected to the inner side of the temperature control box (1).

2. The quality inspection device for the production of ternary lithium batteries according to claim 1, wherein: Five first gears (33) are meshed and connected to the outer side of the second C-shaped mounting plate (34). A fixed rotating shaft (32) is fixedly connected to the inner side of the first gear (33). Both ends of the fixed rotating shaft (32) are rotatably connected to a first C-shaped mounting plate (31). The inner sides of the two first C-shaped mounting plates (31) are both fixedly connected to the fixed rod (2). A servo motor (35) is installed on one side of one of the two first C-shaped mounting plates (31). The output shaft of the servo motor (35) is fixedly connected to one of the five fixed rotating shafts (32) near the middle.

3. The ternary lithium battery production quality inspection device according to claim 1, characterized in that: A DC clamp meter (37) is installed at the front end of the first mounting plate (36). Two groups of symmetrically arranged detection rings are rotatably connected to the front end of the DC clamp meter (37). Two groups of symmetrically arranged second brackets (313) are fixedly connected to the outer wall of the DC clamp meter (37). A connecting rod (312) is rotatably connected to the inner side of the second bracket (313) through a rotating shaft. The other end of the connecting rod (312) is rotatably connected to a first bracket (311) through a rotating shaft. A first electric telescopic rod (310) corresponding to the positions of the two first brackets (311) is fixedly connected to the inner side of the second C-shaped mounting plate (34). The telescopic end of the first electric telescopic rod (310) is rotatably connected to one end of the corresponding first bracket (311).

4. The quality inspection device for the production of ternary lithium batteries according to claim 3, wherein: A permalloy thin strip (38) is fixedly connected to the inner wall of the detection ring of the DC clamp meter (37).

5. The quality inspection device for the production of ternary lithium batteries according to claim 2, characterized in that: One end of one of the five fixed rotating shafts (32) near the middle is fixedly connected to a second gear (314). A synchronous belt (315) is rotatably connected to the outer side of the second gear (314). A third gear (316) is rotatably connected to the inner side of the synchronous belt (315). The inner side of the third gear (316) is fixedly connected to one of the two fixed sleeves (6).

6. The quality inspection device for the production of ternary lithium batteries according to claim 2, wherein: The inner wall of the first C-shaped mounting plate (31) is provided with a second electric telescopic rod (317). The output shaft of the second electric telescopic rod (317) is fixedly connected with a first connecting plate (326). The front end of the first connecting plate (326) is fixedly connected with a coating plate (327). Arc-shaped cleaning plates (318) are fixedly connected to the outer sides of the two coating plates (327) away from each other. Temperature probes (329) are installed on the inner sides of the two coating plates (327) close to each other. A soft brush (328) is fixedly connected to the inner wall of the coating plate (327).

7. The ternary lithium battery production quality inspection device according to claim 6, characterized in that: A second mounting plate (319) is fixedly connected to the outer side of the housing of the second electric telescopic rod (317). A coating liquid tank (320) is fixedly connected to the front end of the second mounting plate (319). A sealing ring is arranged at the output port of the coating liquid tank (320). A discharge pipe (321) is slidably connected to the inner side of the coating liquid tank (320). The outer side of the discharge pipe (321) penetrates through the first connecting plate (326). An atomizing spray head (322) is installed at one end of the discharge pipe (321). The atomizing spray head (322) is installed on the inner side of the coating plate (327). A feed hole is formed in the inner part of the coating liquid tank (320) on the outer side of the discharge pipe (321). The other end of the discharge pipe (321) is rotatably connected with a fourth gear (323) through a bracket. A rack (325) is meshed with the outer side of the fourth gear (323). One end of the rack (325) is fixedly connected with the coating liquid tank (320). Two symmetrically arranged blades (324) are fixedly connected to the two ends of the fourth gear (323) through a rotating shaft.

8. The quality inspection device for the production of ternary lithium batteries according to claim 1, characterized in that: The maintenance mechanism (4) includes a third mounting plate (41) fixedly connected to the second C-shaped mounting plate (34). An air pump (42) is installed at the rear end of the third mounting plate (41). The input port of the air pump (42) penetrates through the third mounting plate (41). An air suction pipe (43) is fixedly communicated with the input port of the air pump (42). The other end of the air suction pipe (43) is fixedly communicated with an adsorption box (44). An activated carbon coating is arranged on the inner wall of the adsorption box (44). A stirring shaft (45) is rotatably connected to the inner side of the adsorption box (44).

9. The quality inspection device for the production of ternary lithium batteries according to claim 8, wherein: Two symmetrically arranged exhaust pipes (46) are fixedly connected to the output port of the air pump (42). The other ends of the exhaust pipes (46) are fixedly connected with a high-pressure storage tank (47). A fire extinguishing agent is arranged inside the high-pressure storage tank (47). An electromagnetic valve (48) is fixedly connected to the upper end of the high-pressure storage tank (47) through a telescopic pipe. A second connecting plate (410) is fixedly connected to the outer sides of the two electromagnetic valves (48). One end of the second connecting plate (410) is fixedly connected to the output shaft of a third electric telescopic rod (49). The lower end of the third electric telescopic rod (49) is fixedly connected to the third mounting plate (41).

10. A method for using a quality inspection device for the production of ternary lithium batteries, applicable to the quality inspection device for the production of ternary lithium batteries described in any one of claims 1-9, characterized in that: Including the following steps: S1. Install the battery body (7) between two groups of fixed sleeves (6). Start the first electric telescopic rod (310), and drive the detection ring of the DC clamp meter (37) to clamp the outer side of the battery body (7) through the connecting rod (312). Then adjust the temperature inside the temperature control box (1) to reach the set conditions. S2. Start the servo motor (35). The output shaft of the servo motor (35) drives the first gear (33) to rotate through the fixed rotating shaft (32), thereby driving the second C-shaped mounting plate (34) to rotate, enabling the DC clamp meter (37) to detect the current output of the battery body (7), and start the CCD camera (39) to detect whether the outer side of the battery body (7) is deformed under specific environments. S3. When the battery body (7) catches fire due to quality problems, turn off the power of the circuit rod (5). Start the air pump (42) and adsorb the generated harmful gases into the adsorption box (44) through the suction pipe (43). The output airflow sprays the fire extinguishing agent in the high-pressure storage tank (47) onto the surface of the battery body (7) through the exhaust pipe (46) using the solenoid valve (48).

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