Conductive clip copper thorn elimination system and method

Abstract

The invention discloses a conductive clip copper thorn eliminating system and method. And the conductive clamp copper thorn eliminating system is used for eliminating copper thorns on the circularly moving conductive clamp. The conductive clip copper thorn eliminating system comprises a stripping and hanging device. The stripping and hanging device comprises a liquid storage mechanism, an electrolysis assembly and a first control assembly, the liquid storage mechanism comprises a liquid storage tank used for storing stripping and hanging liquid, and a jet device is arranged on the side wall of the liquid storage tank and used for introducing air or oxygen into the surface of the conductive clamp or the stripping and hanging liquid; the electrolysis assembly comprises an anode pole, a cathode pole and a control switch which are connected to the same electric loop; the first control assembly comprises a detection element and a controller, the detection element is used for detecting the concentration of copper ions in the stripping liquid, and the controller is electrically connected with the detection element and the control switch. According to the invention, the problem of low stripping and hanging efficiency of the copper thorns on the conductive clip by the conductive clip copper thorn eliminating system and method in the prior art can be at least solved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical electroplating, and in particular to a system and method for eliminating copper thorns in a conductive clip. Background Art

[0002] The preparation process of the composite current collector involves water electroplating. Common water electroplating devices are divided into conductive clamp type and conductive roller type. In the conductive clamp type water electroplating device, when the conductive clamp is used to clamp the film for electroplating, the conductive clamp will inevitably come into contact with the electroplating solution, which will cause the metal ions in the plating solution to deposit on the surface of the conductive clamp, eventually forming larger protruding particles or copper thorns. Larger protruding particles or copper thorns will scratch, puncture or even break the electroplated film, affecting the final product quality.

[0003] At present, the stripping methods for the raised particles or copper thorns on the surface of the conductive clip in the prior art mainly include electrolytic stripping method and chemical stripping method. However, the electrolytic stripping method in the prior art is complicated to operate and too costly, and the stripping liquid causes serious corrosion to the conductive clip, resulting in the conductive clip being unable to be reused; in addition, some stripping methods will also have an adverse impact on the environment during use. Moreover, after a period of stripping, most of the stripping liquids in the prior art have a high metal ion concentration in the stripping liquid, which affects the stripping efficiency of the metal coating on the conductive clip. When the metal ion concentration is too high, the reaction between the stripping liquid and the metal coating is inhibited. Summary of the invention

[0004] The main purpose of the present invention is to provide a conductive clip copper thorn removal system and method, at least to solve the problem of low efficiency of stripping copper thorns on conductive clips in the conductive clip copper thorn removal system and method in the prior art.

[0005] According to one aspect of the present invention, a conductive clip copper thorn removal system is provided, the conductive clip copper thorn removal system is used to remove copper thorns on a cyclically moving conductive clip, comprising:

[0006] The peeling and hanging device comprises a liquid storage mechanism, an electrolytic component and a first control component, wherein:

[0007] The liquid storage mechanism comprises a liquid storage tank, the liquid storage tank is used to store the stripping liquid, an ejector is arranged on the side wall of the liquid storage tank, and the ejector is used to introduce air or oxygen into the surface of the conductive clip or the stripping liquid;

[0008] The electrolytic assembly comprises an anode pole, a cathode pole and a control switch connected to the same electrical circuit, wherein the anode pole and the cathode pole are at least partially placed in the stripping liquid, and the control switch is used to control the on and off of the electrical circuit;

[0009] The first control component includes a detection element and a controller. The detection element is used to detect the copper ion concentration in the stripping liquid. The controller is electrically connected to the detection element and the control switch respectively. The controller is at least used to control the on and off of the control switch based on the signal transmitted by the detection element.

[0010] Furthermore, the liquid reservoir includes a first liquid reservoir and a second liquid reservoir, the first liquid reservoir is arranged on the moving path of the conductive clip to be used for stripping the copper thorns on the surface of the conductive clip, the electrolytic component is arranged in the second liquid reservoir, the first liquid reservoir and the second liquid reservoir are connected through a conveying component, and the conveying component conveys the stripping liquid in the first liquid reservoir to the second liquid reservoir, or conveys the stripping liquid in the second liquid reservoir to the first liquid reservoir.

[0011] Furthermore, the conveying assembly includes a first conveying component and a second conveying component, wherein:

[0012] The first delivery component includes a first delivery pipe and a first pump body, the first pump body is arranged on the first delivery pipe, the second end of the first delivery pipe is connected to the first liquid storage tank, and the first end of the first delivery pipe is connected to the second liquid storage tank;

[0013] The second delivery component includes a second delivery pipe and a second pump body, the second pump body is arranged on the second delivery pipe, the second end of the second delivery pipe is communicated with the first liquid storage tank, and the first end of the second delivery pipe is communicated with the second liquid storage tank.

[0014] Furthermore, the ejector includes a main body and a nozzle, the main body is provided with a jet channel and an air inlet channel, the jet channel is arranged through along the axial direction of the main body, the air inlet channel is arranged on the side wall of the main body and is connected with the jet channel, and the air inlet channel is located outside the liquid storage tank, and the nozzle is connected to the inlet end of the jet channel and is located outside the liquid storage tank.

[0015] Furthermore, a ball head is provided at one end of the main body away from the nozzle, and the ejector further comprises an injection section, on which a through hole communicating with the jet channel is provided, and the injection section is rotatably connected to the ball head.

[0016] Furthermore, the conductive clip comprises a clamping opening, and the outlet end of the jet channel is arranged toward the clamping opening.

[0017] Further, the detection element includes a first detection element and a second detection element, the first detection element is arranged in the second liquid storage tank, the first detection element, the control switch and the first pump body are electrically connected to the controller respectively, the second detection element is arranged in the first liquid storage tank, and the second detection element and the second pump body are electrically connected to the controller;

[0018] The controller controls the control switch according to the signal transmitted by the first detection element, controls the first pump body according to the signal transmitted by the first detection element, and controls the second pump body according to the signal transmitted by the second detection element.

[0019] Furthermore, the stripping device also includes a second control component, which is arranged in the first liquid storage tank. The second control component includes a temperature sensor and a heating element. The temperature sensor is used to monitor the temperature of the stripping liquid in the first liquid storage tank, and the heating element is used to heat the stripping liquid. The controller is electrically connected to the temperature sensor and the heating element, and the controller controls the heating element according to the signal transmitted by the temperature sensor.

[0020] Furthermore, the conductive clip copper thorn elimination system also includes a cleaning device, and the cleaning device includes a cleaning tank, and the cleaning tank is used to clean the conductive clip before and after peeling.

[0021] On the other hand, the present invention also provides a method for removing copper thorns from a conductive clip. The method for removing copper thorns from a conductive clip adopts the above-mentioned conductive clip copper thorn removal system, and specifically comprises:

[0022] Placing the conductive clip into a first cleaning tank for cleaning, and then drying the cleaned conductive clip;

[0023] The conductive clip is placed in the stripping device and kept in the stripping solution with a predetermined temperature and a predetermined pH value for a predetermined time to remove the copper thorns on the surface of the conductive clip, and the detection element is used to monitor the copper ion concentration in the stripping solution. According to the signal transmitted by the detection element, the controller controls the control switch to start or stop the operation of the electrolytic component;

[0024] The conductive clip is taken out from the peeling and hanging device, and placed in a second cleaning tank for cleaning, and then the cleaned conductive clip is blown dry.

[0025] Furthermore, the stripping liquid is an acidic solution, which includes sodium persulfate, sulfuric acid and urotropine. The mass concentration of the sodium persulfate is [100, 200] g / L, the volume concentration of the sulfuric acid is [50, 100] mL / L, and the mass concentration of the urotropine is [0.1, 0.5] g / L.

[0026] Furthermore, the temperature of the stripping solution is [35, 45]°C; and / or the pH value of the stripping solution is [1, 3].

[0027] In the present invention, a stripping device is provided to strip and remove the copper thorns on the conductive clip. An ejector is provided on the side wall of the liquid storage tank, and the ejector can introduce air or oxygen into the surface of the conductive clip or the stripping liquid to promote the oxidation of the copper thorns on the conductive clip and the reaction with the stripping liquid. At the same time, the ejector can also accelerate the flow rate of the stripping liquid, thereby improving the reaction rate between the stripping liquid and the copper thorns at the conductive clip. The copper ion concentration in the stripping liquid has an effect on the stripping rate of the copper thorns on the conductive clip. When the copper ion concentration is too high, the reaction between the stripping liquid and the copper thorns will be inhibited. A detection element is provided to monitor the copper ion concentration in the stripping liquid in real time. The controller is electrically connected to the electrolytic component and the detection element respectively. According to the signal transmitted by the detection element, the controller controls the control switch to control the electrolytic component to electrolyze or stop the stripping liquid. This arrangement can make the copper ion concentration in the stripping liquid within a suitable range, which is conducive to improving the stripping efficiency of the copper thorns. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 It is a schematic diagram of the overall structure of the conductive clip copper thorn elimination system disclosed in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the installation position of the ejector in the conductive clip copper thorn elimination system disclosed in an embodiment of the present invention;

[0031] Figure 3 A cross-sectional view of a first type of ejector in a conductive clip copper thorn elimination system disclosed in an embodiment of the present invention;

[0032] Figure 4 A cross-sectional view of a second type of ejector in the conductive clip copper thorn elimination system disclosed in an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of a cleaning tank in a conductive clip copper thorn removal system disclosed in an embodiment of the present invention;

[0034] Figure 6 The present invention is a flowchart of a method for eliminating copper thorns in a conductive clip according to an embodiment of the present invention.

[0035] The above drawings include the following reference numerals:

[0036] 10. Liquid storage tank; 101. First liquid storage tank; 102. Second liquid storage tank; 1021. Main body; 10211. Groove; 1022. Cover plate; 10221. Positioning groove; 11. Stripping liquid; 20. Electrolytic assembly; 21. Anode pole; 22. Cathode pole; 23. Positioning block; 24. Control switch; 30. Delivery assembly; 31. First delivery component; 311. First delivery pipe; 3111. First end; 3112. Second end; 312. First pump body; 32. Second delivery component; 321. Second delivery pipe; 3211, first end; 3212, second end; 322, second pump body; 40, conductive clip; 41, clamp; 51, first detection element; 52, second detection element; 53, hollow frame; 54, controller; 60, connector; 70, ejector; 701, injection section; 71, main body; 711, jet channel; 7111, first channel section; 7112, second channel section; 712, air inlet channel; 72, nozzle; 73, ball head; 80, cleaning tank; 81, ultrasonic cleaning nozzle; x, length direction; y, height direction. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] As mentioned in the background technology, there is a problem of low reaction rate in the process of removing copper thorns on the conductive clip. In addition, some stripping liquids have a corrosive effect on the conductive clip, and some stripping liquids even pollute the environment in the process of removing the copper thorns. To this end, the present invention proposes a conductive clip copper thorn removal system and method to solve the above problems. The conductive clip copper thorn removal system improves the efficient stripping of the copper thorns on the conductive clip by the stripping liquid through the joint action of the ejector, the electrolytic component and the first control component, thereby improving the stripping efficiency. In the conductive clip copper thorn removal method, adding urotropine to the stripping liquid can improve the stripping efficiency of the copper thorns on the conductive clip and has a corrosion-inhibiting effect on the conductive clip. The conductive clip copper thorn removal system and method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] See also Figures 1 to 6 As shown, according to an embodiment of the present invention, a conductive clip copper thorn elimination system is provided. The conductive clip copper thorn elimination system is used to eliminate copper thorns on a cyclically moving conductive clip 40, and the conductive clip copper thorn elimination system includes a stripping device.

[0042] In this embodiment, the stripping device includes a liquid storage mechanism, an electrolytic component 20 and a first control component, wherein the liquid storage mechanism includes a liquid storage tank 10, the liquid storage tank 10 is used to store the stripping liquid 11, and an ejector 70 is arranged on the side wall of the liquid storage tank 10, and the ejector 70 is used to introduce air or oxygen into the surface of the conductive clip 40 or the stripping liquid 11; the electrolytic component 20 includes an anode pole 21, a cathode pole 22 and a control switch 24 connected to the same electrical circuit, the anode pole 21 and the cathode pole 22 are at least partially placed in the stripping liquid 11, and the control switch 24 is used to control the on-off of the electrical circuit; the first control component includes a detection element and a controller 54, the detection element is used to detect the copper ion concentration in the stripping liquid 11, the controller 54 is electrically connected to the detection element and the control switch 24 respectively, and the controller 54 is at least used to control the on-off of the control switch 24 according to the signal transmitted by the detection element.

[0043] In this embodiment, a stripping device is provided for stripping and removing the copper thorns on the conductive clip 40. An ejector 70 is provided on the side wall of the liquid storage tank 10, and the ejector 70 can pass air or oxygen into the surface of the conductive clip 40 or the stripping liquid 11, so as to promote the oxidation of the copper thorns on the conductive clip 40 and react with the stripping liquid 11. At the same time, the ejector 70 can also accelerate the flow rate of the stripping liquid 11, thereby increasing the reaction rate between the stripping liquid 11 and the copper thorns at the conductive clip 40. The copper ion concentration in the stripping liquid 11 has an effect on the stripping rate of the copper thorns on the conductive clip 40. When the copper ion concentration is too high, the reaction between the stripping liquid 11 and the copper thorns is inhibited. A detection element is provided to monitor the copper ion concentration in the stripping liquid 11 in real time. The controller 54 is electrically connected to the electrolytic component 20 and the detection element respectively. According to the signal transmitted by the detection element, the controller 54 controls the control switch 24 to control the electrolytic component 20 to electrolyze or stop the stripping liquid 11. This arrangement can make the copper ion concentration in the stripping liquid 11 within a suitable range, which is beneficial to improving the stripping efficiency of the stripping liquid 11 on the copper spikes on the conductive clip 40 .

[0044] That is to say, in this embodiment, by arranging the ejector 70 on the side wall of the liquid storage tank 10, and arranging the electrolytic component 20 and the first control component in the liquid storage tank 10, the oxidation reaction of the copper thorns on the conductive clip 40 is promoted, and the reaction between the stripping liquid 11 and the copper thorns is improved, so as to achieve the effect of removing the copper thorns. In addition, the copper ion concentration in the stripping liquid 11 is monitored in real time. When the copper ion concentration is too high, the electrolytic component 20 is started to electrolyze the copper ions, so that the copper ion concentration in the stripping liquid 11 is within a suitable value, which is conducive to the efficient reaction between the copper thorns on the conductive clip 40 and the stripping liquid 11, thereby removing the copper thorns and reducing the influence of the copper thorns on the quality of the conductive film.

[0045] See also Figure 1As shown, the liquid reservoir 10 includes a first liquid reservoir 101 and a second liquid reservoir 102, the first liquid reservoir 101 is used to peel the copper thorns on the surface of the conductive clip 40, and the electrolysis component 20 is arranged in the second liquid reservoir 102. The peeling process and the electrolysis process are respectively arranged in the corresponding liquid reservoir 10, so as to avoid the conflict between peeling and electrolysis. In this embodiment, the conductive clip 40 itself is charged. If the electrolysis component 20 is also arranged in the first liquid reservoir 101, the anode pole 21 and the cathode pole 22 will occupy the space of the peeling liquid 11 in the first liquid reservoir 101, and will also have an adverse effect on the peeling of the copper thorns on the surface of the conductive clip 40. Therefore, the second liquid reservoir 102 is set for electrolysis, and the first liquid reservoir 101 and the second liquid reservoir 102 are connected through the conveying component 30. That is, the conveying component 30 conveys the stripping liquid 11 in the first liquid storage tank 101 to the second liquid storage tank 102, or conveys the stripping liquid 11 in the second liquid storage tank 102 to the first liquid storage tank 101. The arrangement of the conveying component 30 in this embodiment realizes the communication between the first liquid storage tank 101 and the second liquid storage tank 102, thereby realizing the circulation of the stripping liquid 11 in the two liquid storage tanks 10, ensuring the concentration of the stripping liquid 11 and realizing efficient stripping.

[0046] See again Figure 1 As shown, the conveying assembly 30 includes a first conveying component 31 and a second conveying component 32. Specifically, the first conveying component 31 includes a first conveying pipe 311 and a first pump body 312. The first pump body 312 is arranged on the first conveying pipe 311. When the peeling liquid 11 needs to be conveyed, the first pump body 312 can provide power. In this embodiment, the position of the first liquid reservoir 101 can be set higher than the second liquid reservoir 102, or lower than the second liquid reservoir 102. In the actual working process, it needs to be determined according to the specific position of the site. In this embodiment, it is preferred to set the position of the first liquid reservoir 101 higher than the second liquid reservoir 102; since the position of the second liquid reservoir 102 is lower than the position of the first liquid reservoir 101, liquid conveying cannot be achieved by gravity, and external power is required, so the first pump body 312 is arranged on the first conveying pipe 311. Specifically, the second end 3112 of the first delivery pipe 311 is connected to the first liquid storage tank 101, specifically, it is connected to one end of the nozzle 72 of the ejector 70 on the side wall of the first liquid storage tank 101; the first end 3111 of the first delivery pipe 311 is connected to the second liquid storage tank 102, which is conducive to delivering the stripping liquid 11 in the second liquid storage tank 102 to the first liquid storage tank 101.

[0047] Further, the second conveying member 32 includes a second conveying pipe 321 and a second pump body 322, the second pump body 322 is arranged on the second conveying pipe 321, the second end 3212 of the second conveying pipe 321 is connected to the first liquid storage tank 101, and the first end 3211 of the second conveying pipe 321 is connected to the second liquid storage tank 102. The second pump body 322 is provided to improve the conveying efficiency of the peeling liquid 11. In addition, if the position between the second liquid storage tank 102 and the first liquid storage tank 101 changes, the second pump body 322 is required to realize the conveying of the peeling liquid 11, which is conducive to the normal operation of the peeling device.

[0048] See also Figures 1 to 4 As shown, the ejector 70 includes a main body 71 and a nozzle 72. The ejector 70 has a simple structure and is easy to manufacture. Among them, a jet channel 711 and an air inlet channel 712 are arranged inside the main body 71, and the jet channel 711 is arranged to penetrate along the axial direction of the main body 71, which is conducive to the stripping liquid 11 entering the interior of the ejector 70 and being ejected at high speed. At the same time, an air inlet channel 712 is arranged on the side wall of the main body 71, and the air inlet channel 712 extends to communicate with the jet channel 711, which is conducive to air or oxygen entering the interior of the ejector 70. The increase in oxygen content can increase the reaction rate between the copper thorns on the conductive clip 40 in the liquid storage tank 10 and the stripping liquid 11. The ejector 70 is installed on the side wall of the liquid storage tank 10. It is worth noting that the air inlet channel 712 should be located outside the liquid storage tank 10, and the inlet end of the nozzle 72 connected to the ejector channel 711 is also located outside the liquid storage tank 10. This arrangement is conducive to the ejector 70 to take in liquid and inhale air from the outside, increase the mixing of air or oxygen with the stripping liquid 11, and improve the stripping of the copper thorns on the conductive clip 40.

[0049] Furthermore, if Figure 4 As shown, in some ejectors 70, a ball head 73 is provided at one end of the main body 71 away from the nozzle 72, and the ejector 70 also includes an ejection section 701, on which a through hole communicating with the ejection channel 711 is provided, and the ejection section 701 is rotatably connected to the ball head 73. With such an arrangement, in the actual working process, the ejection section 701 can be rotated to different angles according to relevant needs, so as to realize accurate oxygen supply to the clamping mouth of the conductive clip 40, which is conducive to further improving the stripping efficiency of the copper thorns.

[0050] Furthermore, if Figure 3 to Figure 4As shown, the jet channel 711 includes a first channel section 7111 and a second channel section 7112 that are connected in sequence. The cross-sectional area of ​​the end of the first channel section 7111 close to the second channel section 7112 gradually decreases, and the cross-sectional area of ​​the end of the first channel section 7111 gradually decreases, which is conducive to the peeling liquid 11 ejected from the nozzle 72 to maintain a high-speed state in the first channel section 7111. The cross-sectional area of ​​the second channel section 7112 connected to the end of the first channel section 7111 gradually increases, and the length of the second channel section 7112 is longer. When the flow rate of the peeling liquid 11 ejected from the nozzle 72 and the first channel section 7111 is large, the cross-sectional area of ​​the second channel section 7112 is set to gradually increase and the length of the second channel section 7112 is increased, which is conducive to a buffering effect for the high-speed fluid ejected from the first channel section 7111, avoiding damage to the ejector 70 caused by excessive pressure. The nozzle 72 is connected to the first channel section 7111. Specifically, one end of the nozzle 72 is inserted into the first channel section 7111 to increase the flow rate of the stripping liquid 11. The air inlet channel 712 provided on the first channel section 7111 is connected to the first channel section 7111, which is conducive to air entering the interior of the ejector 70 through the air inlet channel 712, mixing with the stripping liquid 11 in the first channel section 7111, and entering the second channel section 7112 through the end of the first channel section 7111. Through the above arrangement, the flow rate of the stripping liquid 11, as well as the air-water mixing efficiency and quality are increased, which is conducive to increasing the oxygen content in the stripping liquid 11 and improving the stripping efficiency of the copper thorns.

[0051] like Figure 2 As shown, the conductive clip 40 has a clamping opening 41. In this embodiment, the ejector 70 is arranged at the clamping opening 41 of the conductive clip 40. In this arrangement, when the stripping liquid 11 is ejected from the ejector 70, it can not only increase the oxygen content in the entire liquid storage tank 10, but also accelerate the flow rate of the stripping liquid 11 at the clamping opening 41, thereby increasing the reaction rate between the stripping liquid 11 and the copper at the clamping opening 41 of the conductive clip 40. In addition, in the actual working process, accumulated bubbles will be generated at the clamping opening 41 to form a bubble layer. The ejector 70 is arranged to be aligned with the clamping opening 41 of the conductive clip 40, which can disperse the bubbles generated and accumulated by the reaction at the clamping opening 41, thereby improving the stripping efficiency of the stripping liquid 11 on the copper thorns on the conductive clip 40. And due to the impact of the stripping liquid 11, some of the copper thorns on the conductive clip 40 can also fall off, reducing the copper thorns on the conductive clip 40, which is conducive to shortening the stripping time.

[0052] See again Figure 1As shown, the detection element includes a first detection element 51 and a second detection element 52. The first detection element 51 is disposed in the second liquid storage tank 102 and is used to monitor in real time the concentration of copper ions in the peeling liquid 11 in the second liquid storage tank 102. A hollow frame 53 is disposed on the periphery of the first detection element 51 and the second detection element 52 to prevent the detection element from colliding in the liquid storage tank 10 and causing damage to the sensing probe, thereby affecting the normal use of the detection element.

[0053] Specifically, the first detection element 51, the control switch 24 and the first pump body 312 are electrically connected to the controller 54, respectively. The controller 54 controls the control switch 24 according to the signal transmitted by the first detection element 51, and the controller 54 also controls the first pump body 312 according to the signal transmitted by the first detection element 51. Specifically, when the copper ion concentration is higher than the set value, the controller 54 controls the control switch 24 in the electrolysis assembly 20 according to the signal fed back by the first detection element 51, so that the anode pole 21 and the cathode pole 22 are connected, the electrolysis is started, and the copper ion concentration in the stripping liquid 11 is reduced. If the copper ion concentration in the stripping liquid 11 fed back by the first detection element 51 is lower than a certain set value (that is, when the copper ion concentration in the stripping liquid 11 is lower than the set value, the activity of the stripping liquid 11 will be lost, and there will be no stripping effect on the copper thorns), the controller 54 controls the control switch 24 to realize the power-off effect between the anode pole 21 and the cathode pole 22, and the electrolysis of the copper ions in the stripping liquid 11 is stopped. A liquid level meter (not shown in the figure) is provided in the first liquid storage tank 101. When the volume of the stripping liquid 11 in the first liquid storage tank 101 decreases and needs to be replenished, the liquid level meter transmits a signal to the controller 54. The controller 54 controls the first pump body 312 to start and transport the electrolyzed stripping liquid 11 to the first liquid storage tank 101.

[0054] Furthermore, the second liquid storage tank 102 includes a main body 1021 and a cover plate 1022, and a groove 10211 is provided on the main body 1021, and a cover plate 1022 is also provided on the main body 1021, and the cover plate 1022 is covered at the notch of the groove 10211. Such a configuration can not only reduce the influence of other substances in the external environment on the concentration or composition of the stripping liquid 11, but also facilitate the installation of the electrolytic component 20 at the second liquid storage tank 102, avoid the pole falling when the electrolytic component 20 electrolyzes the stripping liquid 11, and reduce the occurrence of reduced work efficiency. Specifically, the anode pole 21 and the cathode pole 22 of the electrolytic component 20 are fixedly mounted on the cover plate 1022, and along the height direction of the second liquid storage tank 102 (i.e. Figure 1 The cover plate 1022 is provided with two positioning grooves 10221, which extend along the length direction of the second liquid storage tank 102 (i.e. Figure 1The positioning groove 10221 is arranged in sequence along the x direction in the middle of the cover plate 1022, and the setting of the positioning groove 10221 is conducive to the two poles passing through the cover plate 1022; corresponding raised positioning blocks 23 are provided on the anode pole 21 and the cathode pole 22. When the anode pole 21 and the cathode pole 22 pass through the cover plate 1022 and enter the second liquid storage tank 102, the positioning blocks 23 are fixed to the positioning groove 10221, so that the anode pole 21 and the cathode pole 22 are detachably fixed to the cover plate 1022, thereby improving the working stability of the electrolytic assembly 20.

[0055] Furthermore, a connector 60 is provided between the cover plate 1022 and the first detection element 51, one end of the connector 60 is fixed to the cover plate 1022, and the other end of the connector 60 is connected to the first detection element 51, and the first detection element 51 is provided in the stripping liquid 11. Optionally, the first detection element 51 can be provided at the bottom of the second liquid reservoir 102, or in the second liquid reservoir 102, without touching the bottom of the second liquid reservoir 102 (i.e., the first detection element 51 is suspended in the stripping liquid 11). In this embodiment, it is preferred that the first detection element 51 is suspended in the stripping liquid 11. In this way, the first detection element 51 can swing in the second liquid reservoir 102 instead of being fixed at a certain place, so that the copper ion concentration in the second liquid reservoir 102 can be more accurately and objectively reflected, thereby facilitating precise control.

[0056] Furthermore, in the present embodiment, the second detection element 52 is disposed in the first liquid reservoir 101, and is used to monitor the copper ion concentration in the first liquid reservoir 101 in real time. Among them, the second detection element 52 and the second pump body 322 are both electrically connected to the controller 54. Specifically, when the second detection element 52 detects that the copper ion concentration in the stripping liquid 11 in the first liquid reservoir 101 reaches a certain set value, the stripping liquid 11 has no stripping effect on the copper thorns on the conductive clip 40. Therefore, the controller 54 controls the second pump body 322 according to the signal fed back by the second detection element 52, so as to transport the stripping liquid 11 from the first liquid reservoir 101 to the second liquid reservoir 102, and electrolyze the copper ions in the stripping liquid 11 to achieve the purpose of reducing the copper ion concentration, thereby facilitating the stripping reaction rate of the copper thorns on the conductive clip 40.

[0057] Furthermore, the stripping device also includes a second control component (not shown in the figure). The temperature of the stripping liquid 11 affects the stripping efficiency of the stripping liquid 11 on the copper thorns on the surface of the conductive clip 40. The second control component is set to monitor the stripping liquid 11 in real time. Specifically, the second control component is arranged in the first liquid storage tank 101, and the second control component includes a temperature sensor (not shown in the figure) and a heating element (not shown in the figure). Among them, the temperature sensor is used to monitor the temperature of the stripping liquid 11 in the first liquid storage tank 101, and the heating element is used to heat the stripping liquid 11. Specifically, the temperature sensor and the heating element are both electrically connected to the controller 54. When the temperature sensor detects that the temperature of the stripping liquid 11 is lower than the set value, the controller 54 controls the heating element according to the signal transmitted by the temperature sensor, starts the heating element to heat the stripping liquid 11, and when the temperature reaches the set value, the controller 54 controls the heating element to stop heating the stripping liquid 11. Monitoring the temperature of the stripping liquid 11 is beneficial to maintaining the temperature of the stripping liquid 11 within an appropriate range, thereby improving the stripping efficiency of the stripping liquid 11 on the copper thorns on the surface of the conductive clip 40 .

[0058] Furthermore, the conductive clip copper thorn elimination system also includes a cleaning device. Specifically, the cleaning device includes a cleaning tank 80, which is used to clean the conductive clip 40 before and after stripping. By placing the conductive clip 40 before and after stripping in the cleaning tank 80 for cleaning and drying, the residual substances on the conductive clip 40 are reduced to have an adverse effect on the water electroplating or stripping process.

[0059] See also Figure 5As shown, in this embodiment, a cleaning tank 80 for cleaning the conductive clip 40 before and after peeling is arranged adjacent to the first liquid storage tank 10. Optionally, the number of cleaning tanks 80 can be 1, 2, 3, etc. In this embodiment, it is preferably set to 2, one is set at one end of the first liquid storage tank 101 as the first cleaning tank, and the other is set at the other end of the first liquid storage tank 101 as the second cleaning tank. The first cleaning tank is used for pre-treatment, and the conductive clip 40 before peeling is cleaned with pure water (that is, water treated by reverse osmosis membrane, RO water) and sulfuric acid solution to prevent the electroplating solution remaining on the conductive clip 40 from contaminating the peeling liquid 11. Specifically, in the sulfuric acid solution in the pre-treatment step, the mass fraction of sulfuric acid in the sulfuric acid solution is [1%, 3%], and the use of sulfuric acid solution with this mass fraction can avoid dilution of sulfuric acid in the peeling liquid 11. The second cleaning tank is used for post-treatment, and the conductive clip 40 after peeling is cleaned. Specifically, the cleaning process includes pure water cleaning, ultrasonic water cleaning and spray rinsing. An ultrasonic cleaning nozzle 81 is provided at the bottom of the cleaning tank 80, and the ultrasonic cleaning nozzle 81 is provided directly below the conductive clip 40, which can largely clean the stripping liquid 11 remaining in the gap at the clamping mouth 41 of the conductive clip 40, and can reduce the pollution of the electroplating solution caused by the conductive clip 40 when entering the electroplating process. In the spray rinsing, a sulfuric acid solution is used for spray rinsing, wherein the mass fraction of sulfuric acid in the sulfuric acid solution is [1%, 3%]. The use of a sulfuric acid solution with this mass fraction can avoid dilution of the sulfuric acid in the electroplating solution.

[0060] It can be known from the above embodiments that the conductive clip copper thorn elimination system of the present invention can at least achieve the following technical effects:

[0061] (1) The present invention provides a cleaning tank to clean the conductive clips before and after stripping, thereby avoiding contamination of the stripping solution and the electroplating solution;

[0062] (2) The present invention sets an electrolytic component and a control component, wherein the first control component includes a controller, a first detection element and a second detection element. The first detection element monitors the copper ion concentration of the stripping liquid in the second liquid storage tank in real time. According to the monitoring feedback signal, the controller controls whether the electrolytic component performs electrolysis; the second detection element monitors the copper ion concentration of the stripping liquid in the first liquid storage tank in real time to ensure the copper ion concentration in the stripping liquid and improve the stripping efficiency; and the controller is also electrically connected to the first pump body and the second pump body to improve the transportation or circulation efficiency of the stripping liquid;

[0063] (3) The present invention provides a second control component in the first liquid storage tank, wherein the second control component includes a temperature sensor and a heating element, so that the temperature of the stripping liquid is kept within an optimal range, which is beneficial to improving the stripping efficiency;

[0064] (4) The present invention increases the oxygen content in the first liquid storage tank by arranging an ejector on the side wall of the first liquid storage tank, and the outlet end of the jet channel of the ejector faces the clamping mouth of the conductive clamp, thereby improving the reaction rate between the stripping liquid and the copper spikes at the clamping mouth of the conductive clamp; the ejector can accelerate the flow speed of the stripping liquid at the clamping mouth of the conductive clamp, thereby improving the reaction rate between the stripping liquid and the copper at the clamping mouth of the conductive clamp; the ejector can also disperse the bubble isolation layer generated and accumulated by the reaction at the clamping mouth, thereby improving the stripping reaction rate.

[0065] Combination Figures 1 to 6 As shown, the present invention also provides a method for removing copper thorns from a conductive clip. The method for removing copper thorns from a conductive clip adopts the above-mentioned conductive clip copper thorn removal system to remove the copper thorns on the conductive clip 40. Specifically, removing the copper thorns on the conductive clip 40 includes the following steps:

[0066] Pre-treatment step: Place the conductive clip 40 in the first cleaning tank for cleaning, and then blow dry the cleaned conductive clip 40. In this step, since the composition of the electroplating solution and the stripping solution 11 is different, in order to prevent the residual electroplating solution on the conductive clip 40 from contaminating the stripping solution 11, the conductive clip 40 taken out from the electroplating solution is first cleaned in the first cleaning tank with pure water, wherein the pure water is RO water (i.e., water treated by a reverse osmosis membrane), and then the conductive clip 40 is cleaned with the first solution. Specifically, the first solution is a sulfuric acid solution, in which the mass fraction of sulfuric acid is [1%, 3%] (i.e., 1% ≤ mass fraction of sulfuric acid ≤ 3%). Exemplarily, the mass fraction of sulfuric acid can be 1%, 2%, 3%, etc. In the present invention, a sulfuric acid solution with a mass fraction of sulfuric acid of 2% is preferably used to clean the electroplating solution attached to the surface of the conductive clip 40. Using a sulfuric acid solution with a mass fraction of 2% sulfuric acid can reduce the influence of the cleaning solution on the concentration of the stripping solution 11. The cleaned conductive clip 40 is then blown dry at room temperature using a pressurized blower (not shown) to reduce the effect of the cleaning solution on the concentration of the stripping solution 11. The conductive clip 40 is cleaned and blown dry before being placed in the stripping solution 11 to prevent the components contained in the electroplating solution from contaminating the stripping solution 11, thereby affecting the stripping effect of the stripping solution 11 on the copper thorns on the conductive clip 40.

[0067] Stripping and copper electrolysis steps: Place the conductive clip 40 into the stripping device and keep it in the stripping liquid 11 with a predetermined temperature and a predetermined pH value for a predetermined time to remove the copper thorns on the surface of the conductive clip 40, and at the same time use a detection element to monitor the copper ion concentration in the stripping liquid 11. According to the signal transmitted by the detection element, the controller 54 controls the control switch 24 to start or stop the operation of the electrolytic component 20.

[0068] Furthermore, the stripping liquid 11 for removing the copper thorns on the conductive clip 40 is an acidic solution, which includes three agents: sodium persulfate, sulfuric acid and urotropine. Sodium persulfate is used as an oxidant to oxidize the copper thorns on the conductive clip 40, which is conducive to the reaction of the oxidized copper thorns with sulfuric acid to generate copper sulfate, thereby achieving the effect of removing the copper thorns. The mass concentration of sodium persulfate is [100,200] g / L. For example, the mass concentration of sodium persulfate can be 100g / L, 110g / L, 150g / L, 160g / L, 180g / L, 200g / L, etc. Sulfuric acid provides an acidic environment, which is conducive to the oxidation reaction. The volume concentration of sulfuric acid is [50,100] mL / L. Optionally, the volume concentration of sulfuric acid can be 50mL / L, 60mL / L, 70mL / L, 90mL / L, 100mL / L, etc. Hexamine is used as a promoter in the stripping liquid 11 to accelerate the reaction between the copper thorns and the stripping liquid 11. In addition, it has a corrosion inhibition effect on the conductive clip 40, reducing the corrosion effect of the stripping liquid 11 on the conductive clip 40. The mass concentration of hexamine is [0.1, 0.5] g / L. For example, the mass concentration of hexamine can be 0.1g / L, 0.2g / L, 0.3g / L, 0.4g / L, 0.5g / L, etc. During the preparation of the stripping liquid 11 and the stripping of the copper thorns on the conductive clip 40, no substances harmful to the environment are generated.

[0069] In the present application, the stripping liquid 11 is a strongly acidic solution with a pH value of (0,3]. Optionally, the pH value can be 1, 2, 3, etc., as long as the pH value of the stripping liquid 11 is less than 3. In the present invention, the pH value affects the stripping efficiency of the stripping liquid 11 on the copper thorns on the conductive clip 40. When the pH value is higher than 3, the reaction between the stripping liquid 11 and the copper thorns on the conductive clip 40 is inhibited, and it may even occur that the stripping liquid 11 and the copper thorns do not react.

[0070] In the present application, the conductive clip 40 is placed in the stripping liquid 11 and maintained for a first predetermined time to remove the copper thorns on the surface of the conductive clip 40. In the present embodiment, the temperature of the stripping liquid 11 is [35,45]°C. For example, the temperature of the stripping liquid 11 can be 35°C, 36°C, 38°C, 40°C, 45°C, etc. When the temperature of the stripping liquid 11 is maintained within this range, the stripping liquid 11 can increase the stripping rate of the copper thorns on the surface of the conductive clip 40. If the temperature of the stripping liquid 11 is lower than 35°C, the activity of the stripping liquid 11 will decrease, and the reaction rate with the copper thorns on the surface of the conductive clip 40 will decrease, thereby increasing the stripping reaction time; if the temperature is higher than 45°C, the stripping liquid 11 may fail and cannot effectively strip the copper thorns on the surface of the conductive clip 40. Therefore, in the actual working process, the temperature of the stripping liquid 11 needs to be controlled within a suitable range, which is conducive to increasing the stripping rate of the copper thorns on the conductive clip 40.

[0071] Furthermore, the conductive clip 40 is placed in the stripping liquid 11 for a first predetermined time. In the present invention, the first predetermined time is [25,120] s. For example, the first predetermined time can be 25s, 30s, 35s, 38s, 40s, 45s, 60s, 120s, etc. In the actual stripping process, if the temperature of the stripping liquid 11 is maintained within a suitable range, and the concentration of each component in the stripping liquid 11 is maintained within a set range, if the conductive clip 40 is placed in the stripping liquid 11 for less than 25s, the stripping liquid 11 may not be able to completely strip the copper thorns on the conductive clip 40; if the conductive clip 40 is placed in the stripping liquid 11 for more than 120s, the copper thorns on the conductive clip 40 have been completely stripped and have been in the first liquid storage tank 101, which will affect the remaining conductive clips 40 to be stripped, increase the time of the entire stripping process, and cause waste of resources.

[0072] In the present application, a detection element is used to monitor the copper ion concentration in the stripping liquid 11 during stripping. When the copper ion concentration is higher than a first set value, the copper ions in the stripping liquid 11 are electrolyzed so that the copper ion concentration in the stripping liquid 11 is less than or equal to the first set value. Exemplarily, the detection element can be a copper ion sensor. Specifically, the first set value is [5,100) g / L. For example, the first set value of the copper ion concentration in the stripping liquid 11 can be 5 g / L, 10 g / L, 50 g / L, 60 g / L, 90 g / L, etc. If the copper ion concentration in the stripping liquid 11 is too high, the stripping effect of the stripping liquid 11 on the copper thorns on the conductive clip 40 will be inhibited; if the copper ion concentration in the stripping liquid 11 is too low, the stripping liquid 11 will lose its activity, and the stripping rate of the copper thorns on the conductive clip 40 will be very low or the copper thorns on the conductive clip 40 cannot be stripped. Specifically, when it is monitored that the copper ion concentration in the stripping liquid 11 is greater than or equal to 100g / L, the copper ion concentration in the stripping liquid 11 is too high, which will inhibit the stripping liquid 11 from continuing to react with the copper thorns on the conductive clip 40, reducing the stripping rate, so it is necessary to electrolyze the copper ions in the stripping liquid 11. The controller 54 electrically connected to the detection element controls the second conveying component 32 to transport the stripping liquid 11 in the first liquid storage tank 101 to the second liquid storage tank 102. The controller 54 controls the control switch 24 to start the electrolysis component 20 to electrolyze the copper ions in the stripping liquid 11. When the detection element monitors that the copper ion concentration in the stripping liquid 11 is lower than 5.0g / L, the controller 54 controls the control switch 24 to stop the electrolysis component 20 from electrolyzing the copper ions according to the signal transmitted by the detection element. When the copper ion concentration is lower than 5.0g / L, the activity of the stripping liquid 11 will be affected, affecting the stripping rate and stripping effect of the stripping liquid 11 on the copper thorns on the surface of the conductive clip 40.

[0073] Post-processing step: taking the conductive clip 40 out of the peeling and hanging device, and placing it in a second cleaning tank for cleaning, and then blowing the cleaned conductive clip 40 dry.

[0074] In the present application, since the composition of the stripping liquid 11 is different from that of the electroplating liquid, the stripping liquid 11 remaining on the conductive clip 40 is avoided from polluting the electroplating liquid, and the conductive clip 40 taken out from the stripping liquid 11 is cleaned with a second solution. The second solution includes pure water and sulfuric acid solution. First, it is washed with pure water, and the pure water is RO water (i.e., water treated with a reverse osmosis membrane), and the stripping liquid 11 remaining on the conductive clip 40 is rinsed off. Then, ultrasonic cleaning is performed, and ultrasonic cleaning is also performed with pure water. An ultrasonic cleaning nozzle 81 is provided at the bottom of the second cleaning tank, and ultrasonic cleaning is performed, which is conducive to further cleaning the stripping liquid 11 between the gaps at the clamping mouth of the conductive clip 40, and avoiding contamination of the electroplating liquid. Finally, it is spray rinsed. It is worth noting that during spray rinsing, a sulfuric acid solution having a mass fraction of sulfuric acid in the sulfuric acid solution of [3%, 7%] is used for cleaning. For example, the mass fraction of sulfuric acid in the sulfuric acid solution can be 3%, 4%, 5%, 6%, 7%, etc. In the present invention, the sulfuric acid solution with a mass fraction of 5% is preferably used to spray and rinse the conductive clip 40. This is because the conductive clip 40 needs to be returned to the electroplating tank after being peeled and hung for water electroplating of the composite current collector. The mass fraction of sulfuric acid in the electroplating solution in the electroplating tank is [3%, 7%]. The use of a sulfuric acid solution with a mass fraction of 5% will not dilute the sulfuric acid in the electroplating solution, and will not affect the electroplating effect of the composite current collector during the water electroplating process.

[0075] Furthermore, the cleaned conductive clip 40 is blown dry with a pressurized fan at a temperature of [30,40]°C. For example, the temperature may be 30°C, 32°C, 34°C, 35°C, 40°C, etc. The use of a pressurized fan can increase the drying speed of the conductive clip 40. If the temperature needs to be controlled at this stage, a heating pack is provided at the air outlet of the pressurized fan to effectively adjust the required temperature so that the temperature of the conductive clip 40 is maintained within the required range. After drying, the liquid in the cleaning step can be reduced from entering the electroplating solution, and the conductive clip 40 can reduce the impact on both ends of the composite current collector. Since the temperature of the electroplating solution is

[0076] [30,40]°C, the conductive clip 40 is blown dry at this temperature to reduce the influence of the conductive clip 40 on the temperature of the electroplating solution when entering the electroplating solution, thereby improving the efficiency of electroplating and ensuring the quality of the conductive film.

[0077] In order to verify the stripping effect of the stripping solution 11 of the present invention on the copper thorns on the conductive clip 40, explore the influence of the copper ion concentration in the stripping solution 11 on the stripping reaction and the influence of the current density between the anode pole 21 and the cathode pole 22 on the electrolysis efficiency of the copper ions, the present invention provides the following specific embodiments and comparative examples:

[0078] Example 1

[0079] The conductive clip 40 taken out from the electroplating solution is first cleaned with pure water, which is RO water (i.e., water treated by a reverse osmosis membrane), and then cleaned with a sulfuric acid solution with a mass fraction of 2%, and finally dried with a pressurized fan at room temperature. The dried conductive clip 40 is placed in a stripping solution 11 for stripping.

[0080] Add pure water accounting for 60% of the volume of the container into a fixed container, add sulfuric acid into the pure water, and reduce the temperature of the sulfuric acid solution in the container to below 30°C; add sodium persulfate into the sulfuric acid solution and stir until it is completely dissolved; then add hexamethylenetetramine and stir until it is completely dissolved; finally, add copper sulfate and stir until it is completely dissolved to obtain a peeling liquid 11.

[0081] In this embodiment, the sulfuric acid is concentrated sulfuric acid with a purity of 98%, the mass concentration of sodium persulfate in the stripping liquid 11 is 100 g / L, the volume concentration of sulfuric acid is 50 mL / L, the mass concentration of hexamethylenetetramine is 0.1 g / L, and the temperature of the stripping liquid 11 is 35°C.

[0082] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 120 seconds.

[0083] The stripped conductive clip 40 is taken out from the stripping liquid 11, and the stripping liquid 11 attached to the conductive clip 40 is first washed off with pure water, and then ultrasonic cleaning is performed, and then the conductive clip 40 is sprayed and rinsed with a sulfuric acid solution with a mass fraction of 5%. The conductive clip 40 after spraying and rinsing is blown dry at [30,40]°C with a pressurized fan. The dried conductive clip 40 enters the electroplating tank.

[0084] Example 2

[0085] The peeling liquid 11 of Example 2 is substantially the same as that of Example 1, except that in this example, the temperature of the peeling liquid 11 is 45°C.

[0086] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 60 seconds.

[0087] Example 3

[0088] The stripping solution 11 of Example 3 is substantially the same as that of Example 2, except that, in this example, the mass concentration of sodium persulfate in the stripping solution 11 is 150 g / L.

[0089] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 55 seconds.

[0090] Example 4

[0091] The stripping solution 11 of Example 4 is substantially the same as that of Example 2, except that, in this example, the mass concentration of sodium persulfate in the stripping solution 11 is 200 g / L.

[0092] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 45 seconds.

[0093] Example 5

[0094] The stripping liquid 11 of Example 5 is substantially the same as that of Example 4, except that, in this example, the volume concentration of sulfuric acid in the stripping liquid 11 is 100 mL / L.

[0095] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 40 seconds.

[0096] Example 6

[0097] The stripping liquid 11 of Example 6 is substantially the same as that of Example 5, except that, in this example, the mass concentration of hexamethylenetetramine in the stripping liquid 11 is 0.2 g / L.

[0098] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 38 seconds.

[0099] Example 7

[0100] The stripping liquid 11 of Example 7 is substantially the same as that of Example 5, except that, in this example, the mass concentration of hexamethylenetetramine in the stripping liquid 11 is 0.3 g / L.

[0101] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 35 seconds.

[0102] Example 8

[0103] The stripping liquid 11 of Example 8 is substantially the same as that of Example 5, except that, in this example, the mass concentration of hexamethylenetetramine in the stripping liquid 11 is 0.4 g / L.

[0104] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 30 seconds.

[0105] Example 9

[0106] The stripping liquid 11 of Example 9 is substantially the same as that of Example 5, except that, in this example, the mass concentration of hexamethylenetetramine in the stripping liquid 11 is 0.5 g / L.

[0107] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0108] Example 10

[0109] The stripping solution 11 of Example 10 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 6 g / L.

[0110] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0111] Embodiment 11

[0112] The stripping solution 11 of Example 11 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 10 g / L.

[0113] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0114] Example 12

[0115] The stripping solution 11 of Example 12 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 20 g / L.

[0116] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0117] Example 13

[0118] The stripping solution 11 of Example 13 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 50 g / L.

[0119] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0120] Embodiment 14

[0121] The stripping solution 11 of Example 14 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 70 g / L.

[0122] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0123] Embodiment 15

[0124] The stripping solution 11 of Example 15 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 80 g / L.

[0125] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0126] Example 16

[0127] The stripping solution 11 of Example 16 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 90 g / L.

[0128] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0129] Embodiment 17

[0130] The stripping liquid 11 of Example 17 is substantially the same as that of Example 11, except that in this example, 0.5 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0131] When using 0.5A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of . After 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 6 g / L, and the efficiency of electrolytic copper is 40%.

[0132] Embodiment 18

[0133] The peeling liquid 11 of Example 18 is substantially the same as that of Example 11, except that in this example, 0.6A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0134] When using 0.6A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of . After 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 5 g / L, and the efficiency of electrolytic copper is 50%.

[0135] Embodiment 19

[0136] The stripping liquid 11 of Example 19 is substantially the same as that of Example 11, except that in this example, 0.7 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0137] When using 0.7A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of . After 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 4 g / L, and the efficiency of electrolytic copper is 60%.

[0138] Embodiment 20

[0139] The peeling liquid 11 of Example 20 is substantially the same as that of Example 11, except that in this example, 0.8 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0140] When using 0.8A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of , and after 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 3g / L, and the efficiency of electrolytic copper is 70%.

[0141] Embodiment 21

[0142] The stripping liquid 11 of Example 21 is substantially the same as that of Example 11, except that in this example, 0.9 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0143] When using 0.9A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of , and after 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 2g / L, and the efficiency of electrolytic copper is 80%.

[0144] Comparative Example 1

[0145] The peeling liquid 11 of Comparative Example 1 is substantially the same as that of Example 1, except that in this example, the temperature of the peeling liquid 11 is 25°C.

[0146] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with 1 μm copper spikes used in the process of preparing the composite current collector, the time taken to strip the 1 μm thick copper spikes is 180 seconds.

[0147] Comparative Example 2

[0148] The peeling liquid 11 of Comparative Example 2 is substantially the same as that of Example 1, except that in this example, the temperature of the peeling liquid 11 is 55°C.

[0149] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 60 seconds.

[0150] Comparative Example 3

[0151] The stripping solution 11 of Comparative Example 3 is substantially the same as that of Example 2, except that, in this example, the mass concentration of sodium persulfate in the stripping solution 11 is 250 g / L.

[0152] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 45 seconds.

[0153] Comparative Example 4

[0154] The stripping solution 11 of Comparative Example 4 is substantially the same as that of Example 4, except that, in this example, the volume concentration of sulfuric acid in the stripping solution 11 is 150 mL / L.

[0155] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 40 seconds.

[0156] Comparative Example 5

[0157] The stripping solution 11 of Comparative Example 5 is substantially the same as that of Example 6, except that, in this example, the mass concentration of hexamethylenetetramine in the stripping solution 11 is 0.6 g / L.

[0158] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 25 seconds.

[0159] Comparative Example 6

[0160] The stripping solution 11 of Comparative Example 6 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 3 g / L.

[0161] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 40 seconds.

[0162] Comparative Example 7

[0163] The stripping solution 11 of Comparative Example 7 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 4 g / L.

[0164] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 35 seconds.

[0165] Comparative Example 8

[0166] The stripping solution 11 of Comparative Example 8 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 100 g / L.

[0167] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 27 seconds.

[0168] Comparative Example 9

[0169] The stripping solution 11 of Comparative Example 9 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 101 g / L.

[0170] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 30 seconds.

[0171] Comparative Example 10

[0172] The stripping solution 11 of Comparative Example 10 is substantially the same as that of Example 9, except that, in this example, the mass concentration of copper ions in the stripping solution 11 is 110 g / L.

[0173] When the stripping liquid 11 in this embodiment is used to strip the conductive clip 40 with a copper spike of 1 μm used in the process of preparing the composite current collector, the time taken to strip the copper spike of 1 μm is 60 seconds.

[0174] Comparative Example 11

[0175] The peeling liquid 11 of comparative example 11 is substantially the same as that of example 11, except that in this example, 0.1 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0176] When using 0.1A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of . After 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 10 g / L, and the efficiency of electrolytic copper is 0.

[0177] Comparative Example 12

[0178] The peeling liquid 11 of comparative example 12 is substantially the same as that of example 11, except that in this example, 0.2 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0179] When using 0.2A / dm 2The copper ion concentration in the stripping solution 11 is electrolyzed with a current of . After 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 9 g / L, and the efficiency of electrolytic copper is 10%.

[0180] Comparative Example 13

[0181] The peeling liquid 11 of comparative example 13 is substantially the same as that of example 11, except that in this example, 0.3A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0182] When using 0.3A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of , and after 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 8 g / L, and the efficiency of electrolytic copper is 20%.

[0183] Comparative Example 14

[0184] The peeling liquid 11 of comparative example 14 is substantially the same as that of example 11, except that in this example, 0.4A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0185] When using 0.4A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of . After 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 7 g / L, and the efficiency of electrolytic copper is 30%.

[0186] Comparative Example 15

[0187] The stripping liquid 11 of comparative example 15 is substantially the same as that of example 11, except that in this example, 1.0 A / dm 2 The copper ions in the stripping solution 11 are electrolyzed with a current of , and the electrolysis time is 10 min.

[0188] When using 1.0A / dm 2 The copper ion concentration in the stripping solution 11 is electrolyzed with a current of , and after 10 minutes of electrolysis, the copper ion concentration in the stripping solution 11 is 2g / L, and the efficiency of electrolytic copper is 80%.

[0189] According to the above examples and comparative examples, Table 1, Table 2 and Table 3 are as follows:

[0190] Table 1:

[0191]

[0192]

[0193] According to Table 1: By comparing Example 1 and Example 2, it can be seen that as the temperature of the stripping liquid 11 increases, the time for the stripping liquid 11 to strip the conductive clip 40 with 1 μm copper spikes used in the process of preparing the composite current collector becomes shorter, thereby increasing the stripping rate of the copper spikes on the conductive clip 40.

[0194] By comparing Examples 2 to 4, it can be seen that the volume concentration of sulfuric acid and the mass concentration of urotropine in the stripping liquid 11 remain unchanged. As the mass concentration of sodium persulfate increases, the time for the stripping liquid 11 to strip the conductive clip 40 with 1 μm copper spikes used in the preparation of the composite current collector becomes shorter, thereby improving the stripping rate of the copper spikes on the conductive clip 40.

[0195] By comparing Example 4 and Example 5, it can be seen that the mass concentrations of sodium persulfate and urotropine in the stripping liquid 11 remain unchanged. As the volume concentration of sulfuric acid increases, the time for the stripping liquid 11 to strip the conductive clip 40 with 1 μm copper spikes used in the preparation of the composite current collector becomes shorter, thereby improving the stripping rate of the copper spikes on the conductive clip 40.

[0196] By comparing Examples 5 to 9, it can be seen that the mass concentration of sodium persulfate and the volume concentration of sulfuric acid in the stripping liquid 11 remain unchanged. As the mass concentration of hexamine increases, the time for the stripping liquid 11 to strip the conductive clip 40 with 1 μm copper spikes used in the preparation of the composite current collector becomes shorter, thereby improving the stripping rate of the copper spikes on the conductive clip 40.

[0197] By comparing Table 1, Example 1, Example 2, Comparative Example 1 and Comparative Example 2, it can be found that when the temperature of the stripping liquid 11 increases (that is, when the temperature of the stripping liquid 11 reaches 55° C.), the stripping time of the 1 μm copper spikes on the conductive clip 40 by the stripping liquid 11 first decreases and then remains unchanged.

[0198] By comparing Table 1, Examples 2 to 4, and Comparative Example 3, it can be found that when the mass concentration of sodium persulfate in the stripping liquid 11 is too large (i.e., the mass concentration of sodium persulfate is greater than 250 g / L), and the concentrations of other substances remain unchanged, the stripping time of the 1 μm copper thorns on the conductive clip 40 by the stripping liquid 11 first decreases and then remains unchanged.

[0199] By comparing Table 1, Example 4, Example 5 and Comparative Example 4, it is found that when the mass concentrations of sodium persulfate and hexamethylenetetramine in the stripping liquid 11 remain unchanged, the volume concentration of sulfuric acid is increased (that is, the volume concentration of sulfuric acid is increased to 150 mL / L), the time for the stripping liquid 11 to completely strip the copper thorns on the conductive clip 40 first decreases and then remains unchanged.

[0200] By comparing Table 1, Examples 5 to 9 and Comparative Example 5, it is found that when the concentrations of sodium persulfate and sulfuric acid in the stripping solution 11 remain unchanged, the concentration of urotropine is too high (i.e., the mass concentration of urotropine reaches 0.6 g / L), and the time for the stripping solution 11 to completely strip the 1 μm thick copper thorns on the conductive clip 40 first decreases and then remains unchanged.

[0201] Specifically, the temperature of the stripping liquid 11 affects the activity of the stripping liquid 11. When the temperature of the stripping liquid 11 is low, the stripping time of the stripping liquid 11 on the copper thorns on the conductive clip 40 is long, which affects the stripping process. When the temperature of the stripping liquid 11 increases, the activity of the stripping liquid 11 is increased, and the stripping of the copper thorns on the conductive clip 40 by the stripping liquid 11 is accelerated. However, it is worth noting that the temperature of the stripping liquid 11 affects the material components in the stripping liquid 11. When the temperature of the stripping liquid 11 is too high, the sodium persulfate in the stripping liquid 11 will be decomposed, thereby inactivating the stripping liquid 11 and failing to oxidize the copper thorns.

[0202] Furthermore, when the amount of the substance components added to the stripping solution 11 is too large, the stripping rate of the copper thorns first increases and then remains unchanged. This is mainly because the solute has a fixed solubility in the solution at a certain temperature. The present application selects the most suitable temperature to prevent the decomposition of sodium persulfate and the inactivation of the stripping solution 11. At this temperature, the solubility of sodium persulfate, sulfuric acid and hexamethylenetetramine in the stripping solution 11 reaches a saturated state. If these substances are continued to be added, the mass concentration of the solution will not change, so there is no promoting effect on the reaction.

[0203] Table 2:

[0204]

[0205] By comparing Table 2 and Examples 9 to 16, it can be seen that, when the concentration of the components in the stripping solution 11 is kept unchanged and the temperature is kept constant, as the copper ion concentration in the stripping solution 11 increases, when it is between 5 g / L and 100 g / L (excluding 100 g / L), the copper ion concentration has no inhibitory effect on the stripping reaction. However, it is worth noting that when the copper ion concentration in the stripping solution 11 reaches 100 g / L, the copper ion concentration in the stripping solution 11 has an inhibitory effect on the stripping reaction between the stripping solution 11 and the copper thorns on the conductive clip 40.

[0206] By comparing Table 2, Examples 9 to 16, and Comparative Examples 6 to 10, it can be seen that when the copper ion concentration in the stripping solution 11 is lower than 5 g / L, the stripping reaction is limited by the low copper ion concentration, and the rate of the stripping reaction is low. Specifically, the time for the stripping solution 11 to completely strip the 1 μm thick copper thorns on the conductive clip 40 tends to gradually decrease; when the copper ion concentration in the stripping solution 11 is higher than 100 g / L, the time for the stripping solution 11 to completely strip the 1 μm thick copper thorns on the conductive clip 40 tends to gradually increase. This shows that when the copper ion concentration in the stripping solution 11 is too high, the stripping reaction is inhibited.

[0207] Specifically, the copper ion concentration in the stripping liquid 11 affects the stripping rate of the copper thorns on the conductive clip 40 by the stripping liquid 11. When the copper ion concentration in the stripping liquid 11 is lower than 5g / L, the stripping rate of the copper thorns on the conductive clip 40 by the stripping liquid 11 is low, and it takes a long time to completely strip the copper thorns. When the copper ion concentration in the stripping liquid 11 is greater than or equal to 100g / L, the stripping rate of the copper thorns on the conductive clip 40 by the stripping liquid 11 also inhibits it. As the copper ion concentration gradually increases, it takes longer and longer to completely strip the copper thorns on the conductive clip 40, which is not conducive to the stripping reaction. Therefore, it is necessary to electrolyze the stripping liquid 11, but during the electrolysis process, it is also necessary to monitor the copper ion concentration in the stripping liquid 11 in real time. When the copper ion concentration is lower than 5g / L, it is necessary to stop the electrolysis immediately to avoid the copper ion concentration in the stripping liquid 11 being too low, which affects the rate of the stripping reaction.

[0208] Table 3:

[0209]

[0210]

[0211] By comparing Table 3, Examples 17 to 21, and Comparative Examples 11 to 15, it can be seen that as the current density increases, the electrolytic copper efficiency gradually increases. However, when the current density increases to 1.0 A / dm 2 When the efficiency of electrolytic copper is 0.9A / dm 2 The electrolytic copper efficiency remains unchanged. However, when the current density is 0.1A / dm 2 When the current density is too small, the copper ions in the stripping solution 11 cannot be electrolyzed. Therefore, in the actual electrolysis process, the current density in the electrolysis step needs to be reasonably controlled to ensure the electrolysis step.

[0212] In summary, the stripping liquid 11 made of sodium persulfate, sulfuric acid and urotropine of the present invention, the concentration of each material component in the stripping liquid 11 is maintained within a certain range, the activity of the stripping liquid 11 is improved, and the copper thorns on the conductive clip 40 can be efficiently stripped. Among them, sulfuric acid provides an acidic environment, sodium persulfate is used as an oxidant in the solution, and after being dissolved in water, the persulfate ion exists in the form of ions. When it contacts the copper thorns on the conductive clip 40, the copper thorns can be oxidized so that the copper thorns exist in the stripping liquid 11 in the form of ions, achieving the effect of removing the copper thorns. And urotropine is both a promoter and a corrosion inhibitor in the stripping liquid 11. Hexamine can promote the stripping liquid 11 to quickly strip the copper thorns on the conductive clip 40, improve the stripping efficiency, and ensure that the conductive clip 40 is basically not corroded by the stripping liquid 11. In addition, copper sulfate is added to the stripping liquid 11 so that the stripping liquid 11 can be used to strip the copper thorns on the conductive clip 40 immediately after preparation, thereby improving the stripping effect of the stripping liquid 11 on the copper thorns on the conductive clip 40 .

[0213] The present invention experiments on the stripping efficiency of the copper thorns on the conductive clip 40 by preparing stripping liquids 11 of different concentrations. The analysis of the experimental data shows that: in the stripping liquid 11 prepared by sodium persulfate, sulfuric acid and urotropine, when the temperature of the stripping liquid 11 is kept within a suitable range, the stripping liquid 11 is continuously provided with air or oxygen by the ejector 70, and the stripping liquid 11 can realize the efficient stripping of the copper thorns on the workpiece such as the conductive clip 40. If the temperature of the stripping liquid 11 is too high, the stripping liquid 11 will be inactivated, and the stripping of the copper thorns on the conductive clip 40 cannot be realized. At the same time, in the stripping liquid 11, the addition amount of sodium persulfate, sulfuric acid and urotropine has an influence on the stripping efficiency. Specifically, when the concentration of the added substance exceeds the maximum value of the suitable range, the solubility of various substance components in the stripping liquid 11 reaches the maximum value, so that the stripping of the copper thorns is not promoted. Therefore, in the actual production process, while maintaining a suitable temperature, the concentration of various substances needs to be maintained within a suitable range of values, so that the copper spikes on the conductive clip 40 can be stripped efficiently without wasting resources.

[0214] The present invention verifies the influence of copper ion concentration on the stripping reaction by changing the concentration of copper ions in the stripping liquid 11 in the stripping liquid 11 with the same concentration of material components. Through the analysis of experimental data, the results show that when the copper ion concentration in the stripping liquid 11 is less than 5g / L, the stripping rate of the copper thorns on the conductive clip 40 by the stripping liquid 11 is low, and the time required for the reaction is long. When the copper ion concentration is between 5g / L and 100g / L (excluding 100g / L), the influence of the copper ion concentration on the stripping reaction does not change significantly. However, when the copper ion concentration is greater than or equal to 100g / L, the copper ion concentration increases, inhibiting the stripping reaction, and the time required for the reaction is getting longer and longer. Therefore, it is necessary to monitor the copper ion concentration in the stripping liquid 11 in real time, and when the copper ion concentration is greater than or equal to 100g / L, immediately start the conveying component 30 to transport the stripping liquid 11 to the second liquid storage tank 102 for electrolysis.

[0215] The present invention also verifies the influence of current density on electrolytic copper by setting up experiments. The experimental data show that when the current density is less than or equal to 0.1A / dm 2 When the current density is greater than 0.9A / dm 2 When the electrolytic copper efficiency reaches the maximum value, the copper ions in the stripping solution 11 cannot be further electrolyzed if the current density is further increased. It is worth noting that when the current density is less than 0.5A / dm 2 When the current density is greater than 0.9A / dm 2 When the current density is too high, the copper electrolyzed will become powder, which is not conducive to collection.

[0216] It can be known from the above embodiments and comparative examples that in the present application, the conductive clip 40 taken out from the electroplating solution is first cleaned with a sulfuric acid solution having a mass fraction of sulfuric acid of [1%, 3%], and then the conductive clip 40 is blown dry with a pressurized blower. This pre-treatment can effectively clean the electroplating solution remaining on the conductive clip 40, prevent contamination of the stripping solution 11, and the conductive clip 40 is cleaned with a sulfuric acid solution having a mass fraction of sulfuric acid of [1%, 3%], ensuring that the sulfuric acid in the stripping solution 11 will not be diluted.

[0217] Then, the pre-treated conductive clip 40 is placed in the first liquid storage tank 101. The mass concentration of sodium persulfate in the stripping liquid 11 in the first liquid storage tank 101 is [100, 200] g / L, the volume concentration of sulfuric acid is [50, 100] mL / L, and the mass concentration of hexamine is [0.1, 0.5] g / L. The temperature is maintained at [35, 45] ° C, which can ensure the activity of the stripping liquid 11, which is conducive to stripping the copper thorns on the conductive clip 40. And the ejector 70 is used to pass air or oxygen to the surface of the conductive clip 40 or the stripping liquid 11. It is conducive to efficiently stripping the copper thorns on the conductive clip 40, thereby improving the stripping efficiency. The copper ion concentration in the stripping liquid 11 is monitored in real time by the second detection element 52. When the copper ion concentration of the stripping liquid 11 in the first liquid storage tank 101 is greater than or equal to 100 g / L, the conveying component 30 is started to convey the stripping liquid 11 to the second liquid storage tank 102. The detection element 52 is used to monitor the copper ion concentration in real time. When the copper ion concentration of the stripping liquid 11 in the first liquid storage tank 101 is greater than or equal to 100 g / L, the conveying component 30 is started to convey the stripping liquid 11 to the second liquid storage tank 102. 2 The copper ion concentration in the stripping solution 11 is electrolyzed at a current density of 100000, and the copper ion concentration in the second liquid storage tank 102 is monitored in real time by using the first detection element 51. When the copper ion concentration is about 5 g / L, the electrolysis is stopped to prevent the stripping solution 11 from stripping the copper thorns on the conductive clip 40, thereby affecting the stripping rate. In the above manner, the copper thorns on the conductive clip 40 can be completely stripped off, thereby preventing the copper thorns on the conductive clip 40 from scratching, puncturing or even breaking the electroplated film, thereby improving the quality of the final product.

[0218] Finally, the stripped conductive clip 40 is post-processed to effectively avoid contamination of the electroplating solution. The conductive clip 40 is first cleaned with pure water, then ultrasonically cleaned, and finally sprayed with a sulfuric acid solution with a mass fraction of [3%, 7%] of sulfuric acid to clean the conductive clip 40. In this way, the stripping liquid 11 remaining on the conductive clip 40 can be cleaned. The cleaned conductive clip 40 is blown dry at [30, 40]°C using a pressurized fan and a heating pack to reduce the impact on the temperature of the electroplating solution and improve the efficiency of the electroplating process.

[0219] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0220] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0221] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A conductive clip copper thorn removal system, the conductive clip copper thorn removal system is used to remove copper thorns on a cyclically moving conductive clip (40), characterized in that: include: A peeling and hanging device, comprising a liquid storage mechanism, an electrolytic component (20) and a first control component, wherein: The liquid storage mechanism comprises a liquid storage tank (10), the liquid storage tank (10) is used to store the stripping liquid (11), an ejector (70) is arranged on the side wall of the liquid storage tank (10), and the ejector (70) is used to introduce air or oxygen into the surface of the conductive clip (40) or the stripping liquid (11); The electrolytic assembly (20) comprises an anode pole (21), a cathode pole (22) and a control switch (24) connected to the same electrical circuit, wherein the anode pole (21) and the cathode pole (22) are at least partially placed in the stripping liquid (11), and the control switch (24) is used to control the on and off of the electrical circuit; The first control component comprises a detection element and a controller (54), wherein the detection element is used to detect the copper ion concentration in the peeling liquid (11), and the controller (54) is electrically connected to the detection element and the control switch (24) respectively, and the controller (54) is at least used to control the on and off of the control switch (24) according to the signal transmitted by the detection element.

2. The conductive clip copper thorn elimination system according to claim 1, characterized in that: The liquid storage tank (10) comprises a first liquid storage tank (101) and a second liquid storage tank (102); the first liquid storage tank (101) is arranged on the moving path of the conductive clip (40) for stripping the copper thorns on the surface of the conductive clip (40); the electrolytic component (20) is arranged in the second liquid storage tank (102); the first liquid storage tank (101) and the second liquid storage tank (102) are connected via a conveying component (30); the conveying component (30) conveys the stripping liquid (11) in the first liquid storage tank (101) to the second liquid storage tank (102), or conveys the stripping liquid (11) in the second liquid storage tank (102) to the first liquid storage tank (101).

3. The conductive clip copper thorn elimination system according to claim 2, characterized in that: The conveying assembly (30) comprises a first conveying component (31) and a second conveying component (32), wherein: The first conveying component (31) comprises a first conveying pipe (311) and a first pump body (312); the first pump body (312) is arranged on the first conveying pipe (311); the second end (3112) of the first conveying pipe (311) is in communication with the first liquid storage tank (101); and the first end (3111) of the first conveying pipe (311) is in communication with the second liquid storage tank (102); The second conveying component (32) comprises a second conveying pipe (321) and a second pump body (322); the second pump body (322) is arranged on the second conveying pipe (321); the second end (3212) of the second conveying pipe (321) is connected to the first liquid storage tank (101); and the first end (3211) of the second conveying pipe (321) is connected to the second liquid storage tank (102).

4. The conductive clip copper thorn elimination system according to any one of claims 1 to 3, characterized in that: The ejector (70) comprises a main body (71) and a nozzle (72); the main body (71) is provided with a jet channel (711) and an air inlet channel (712); the jet channel (711) is arranged to penetrate along the axial direction of the main body (71); the air inlet channel (712) is arranged on the side wall of the main body (71) and is connected to the jet channel (711); the air inlet channel (712) is located outside the liquid storage tank (10); and the nozzle (72) is connected to the inlet end of the jet channel (711) and is located outside the liquid storage tank (10).

5. The conductive clip copper thorn elimination system according to claim 4, characterized in that: A ball head (73) is provided at one end of the main body (71) facing away from the nozzle (72), and the ejector (70) further comprises an ejection section (701), wherein the ejection section (701) is provided with a through hole communicating with the ejection channel (711), and the ejection section (701) is rotatably connected to the ball head (73).

6. The conductive clip copper thorn elimination system according to claim 4, characterized in that: The conductive clamp (40) comprises a clamp opening (41), and the outlet end of the jet channel (711) is arranged toward the clamp opening (41).

7. The conductive clip copper thorn elimination system according to claim 3, characterized in that: The detection element comprises a first detection element (51) and a second detection element (52); the first detection element (51) is arranged in the second liquid storage tank (102); the first detection element (51), the control switch (24) and the first pump body (312) are respectively electrically connected to the controller (54); the second detection element (52) is arranged in the first liquid storage tank (101); the second detection element (52) and the second pump body (322) are both electrically connected to the controller (54); The controller (54) controls the control switch (24) according to the signal transmitted by the first detection element (51), the controller (54) also controls the first pump body (312) according to the signal transmitted by the first detection element (51), and the controller (54) also controls the second pump body (322) according to the signal transmitted by the second detection element (52).

8. The conductive clip copper thorn elimination system according to any one of claims 2, 3 and 7, characterized in that: The stripping device also includes a second control component, which is arranged in the first liquid storage tank (101). The second control component includes a temperature sensor and a heating element. The temperature sensor is used to monitor the temperature of the stripping liquid (11) in the first liquid storage tank (101), and the heating element is used to heat the stripping liquid (11). The controller (54) is electrically connected to the temperature sensor and the heating element, and the controller (54) controls the heating element according to the signal transmitted by the temperature sensor.

9. The conductive clip copper thorn elimination system according to any one of claims 2, 3, 5, 6 and 7, characterized in that: The conductive clip copper thorn elimination system further comprises a cleaning device, wherein the cleaning device comprises a cleaning tank (80), and the cleaning tank (80) is used to clean the conductive clip (40) before and after peeling.

10. A method for removing copper thorns from a conductive clip, characterized in that: The conductive clip copper thorn elimination system according to any one of claims 1 to 9 specifically comprises: Placing the conductive clip (40) in a first cleaning tank for cleaning, and then drying the cleaned conductive clip (40); The conductive clip (40) is placed in the stripping device and kept in the stripping liquid (11) with a predetermined temperature and a predetermined pH value for a predetermined time to remove the copper thorns on the surface of the conductive clip (40), and the detection element is used to monitor the copper ion concentration in the stripping liquid (11). According to the signal transmitted by the detection element, the controller (54) controls the control switch (24) to start or stop the operation of the electrolytic component (20); The conductive clip (40) is taken out from the peeling and hanging device and placed in a second cleaning tank for cleaning, and then the cleaned conductive clip (40) is blown dry.

11. The method for removing copper thorns of a conductive clip according to claim 10, characterized in that: The stripping liquid (11) is an acidic solution, which includes sodium persulfate, sulfuric acid and urotropine. The mass concentration of the sodium persulfate is [100, 200] g / L, the volume concentration of the sulfuric acid is [50, 100] mL / L, and the mass concentration of the urotropine is [0.1, 0.5] g / L.

12. The method for removing copper thorns of a conductive clip according to claim 10 or 11, characterized in that: The temperature of the stripping liquid (11) is [35, 45]°C; and / or the pH value of the stripping liquid (11) is [1, 3].

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