Soldering flux tank and series welding machine

Abstract

The utility model provides a soldering flux tank and a series welding machine. The soldering flux tank comprises an inner tank, an outer tank and a crystallization suppressor, the interior of the inner groove is used for containing scaling powder; the interior of the outer tank is used for containing liquid, an opening is formed in the top of the outer tank, and the inner tank can be contained in the outer tank through the opening and immersed in the liquid; the crystallization suppressor is used for applying operation to the liquid so as to suppress crystallization of the soldering flux and effectively reduce the possibility of crystal formation, so that crystals left in the soldering flux are as few as possible, impurities in the soldering flux are correspondingly less, the adverse effect of concentration reduction of the soldering flux due to the impurities on the welding process quality is weakened, and the welding quality is improved. The welding process quality is ensured.

Description

Technical Field

[0001] The utility model relates to the field of battery manufacturing, in particular to a flux tank and a string welding machine. Background Art

[0002] With the rapid development of the photovoltaic industry, solar cells are widely used due to their advantages of being green, environmentally friendly and energy-saving. Since solar cells cannot be used directly as a power source, a welding ribbon is required to connect a number of solar cells in series or in parallel to form a battery string. The welding ribbon is connected to the solar cell by welding. In order to ensure the reliability of the connection between the welding ribbon and the solar cell, flux needs to be applied on the surface of the welding ribbon before welding.

[0003] In the related art, the flux coating method commonly used by the string soldering machine is the dipping method. Specifically, the string soldering machine is provided with a flux tank, and the soldering ribbon can be extended into the flux tank, soaked in the flux, and then passed out of the flux tank. However, in this method, a lot of impurities will remain in the flux tank (such as oxides on the surface of the soldering ribbon and crystals formed by the reaction of the soldering ribbon and the flux, etc.). When there are more impurities accumulated in the flux tank, it will affect the concentration of the flux, and thus affect the quality of the welding process. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art, and proposes a soldering flux tank and a string soldering machine.

[0005] In the first aspect, the utility model provides a flux tank, comprising: an inner tank, an outer tank and a crystallization inhibitor; the interior of the inner tank is used to hold flux; the interior of the outer tank is used to hold liquid, and the top of the outer tank has an opening, and the inner tank can be placed in the outer tank through the opening and immersed in the liquid; the crystallization inhibitor is used to apply an operation to the liquid to inhibit crystallization of the flux.

[0006] In some possible embodiments, the crystallization inhibitor includes an ultrasonic generator arranged on the outer groove, which can emit ultrasonic waves, and the ultrasonic waves are used to induce liquid vibration to drive the flux to vibrate; and / or, the crystallization inhibitor includes a heater, a temperature detection device and a controller, the heater can heat the liquid, the temperature detection device is used to detect the temperature of the liquid, the controller is electrically connected to the heater and the temperature detection device, and the controller controls the heater according to the temperature detected by the temperature detection device, so that the liquid is heated to a preset temperature.

[0007] In some possible embodiments, when the crystallization inhibitor includes a heater, a temperature detection device and a controller, the flux tank also includes a display component arranged on the outer surface of the outer tank, the display component is electrically connected to the controller, and the controller controls the display state of the display component according to the temperature of the liquid.

[0008] In some possible embodiments, the inner groove is provided with an insertion port and a projection port, the outer groove is provided with a first through hole and a second through hole, the first through hole, the insertion port, the interior of the inner groove, the projection port and the second through hole are connected in sequence to form a channel for the soldering ribbon to pass through, and the soldering ribbon passing through the channel is immersed in flux.

[0009] In some possible embodiments, the flux tank further includes a cover body, and the cover body can move relative to the outer tank to open and close the opening.

[0010] In some possible embodiments, an operable handle is provided on the cover body; and / or the cover body is movably connected to the outer groove.

[0011] In some possible embodiments, the cover body is provided with an exhaust hole, and when the cover body covers the opening, the gas in the inner tank can be discharged to the outside of the outer tank through the exhaust hole.

[0012] In some possible embodiments, the inner groove has an upward opening; the flux groove also includes a screen, which can be placed in the inner groove or taken out from the inner groove through the opening; when the screen is placed in the inner groove, the screen is used to filter impurities in the flux; and / or, the flux groove also includes a switch component arranged on the outer surface of the outer groove, the switch component has an on state and an off state, when in the on state, the crystallization inhibitor is running; when in the off state, the crystallization inhibitor is shut down.

[0013] In some possible embodiments, the flux tank also includes a flux storage container, a supply pipeline and a first driver, the flux storage container is connected to the inner tank through the supply pipeline, and the first driver is used to drive the flux in the flux storage container to be transported to the inner tank via the supply pipeline; and / or, the flux tank also includes a flux recovery container, a recovery pipeline and a second driver, the flux recovery container is connected to the inner tank through the recovery pipeline, and the second driver is used to drive the flux in the inner tank to be transported to the flux recovery container via the recovery pipeline.

[0014] In a second aspect, the utility model provides a string welding machine, comprising: a welding device and any one of the flux tanks provided in the first aspect of the utility model, wherein the welding device is located downstream of the flux tank.

[0015] The utility model has the following beneficial effects:

[0016] The flux tank provided by the utility model is designed with an inner tank and an outer tank. The inner tank is used to hold the flux, and the outer tank is used to hold the liquid. The inner tank can be accommodated in the outer tank and immersed in the liquid. The crystallization inhibitor is applied to the liquid to inhibit the flux from agglomerating and crystallizing, thereby effectively reducing the possibility of crystal formation, so that the crystals retained in the flux are as small as possible, and the impurities in the flux are correspondingly small, which is beneficial to weakening the adverse effect of the flux concentration reduction due to impurities on the welding process quality, thereby ensuring the welding process quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a welding ribbon feeding device in a string welding machine provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of a flux tank provided in an embodiment of the present application;

[0019] Figure 3 for Figure 2 A cross-sectional view of the flux tank is shown;

[0020] Figure 4 for Figure 2 A top view of the flux tank is shown;

[0021] Figure 5 A side view of a flux tank provided in one embodiment of the present application;

[0022] Figure 6 for Figure 2 The schematic diagram of the structure of the flux tank shown omits the outer tank.

[0023] Description of reference numerals:

[0024] 10- flux tank; 11- outer tank; 111- first through hole; 112- second through hole; 12- cover body;

[0025] 121-handle; 122-exhaust hole; 13-switch assembly; 14-controller; 15-indicator light; 16-liquid; 17-inner tank; 171-inlet; 172-outlet; 18-soldering flux;

[0026] 20-welding strip winding device;

[0027] 30-traction device;

[0028] 40-screen;

[0029] 50-welding strip;

[0030] 60- flux storage container; 61- supply pipeline; 62- first driver;

[0031] 70 - flux recovery container; 71 - recovery pipeline; 72 - second driver. DETAILED DESCRIPTION

[0032] At present, the flux tank is usually cleaned manually on a regular basis. During the manual cleaning process, the soldering tape needs to stop running, which causes the stringer to shut down. Therefore, the welding efficiency will be affected, which in turn affects the battery production efficiency. In particular, in order to reduce the difficulty of cleaning and ensure a better cleaning effect, the flux tank is cleaned frequently. At this time, the stringer shuts down more frequently, which greatly reduces the welding efficiency and production efficiency. When the cleaning frequency is low, the cleaning difficulty is high.

[0033] In addition, the manual cleaning method inevitably has the following problems.

[0034] Firstly, the labor cost is high, the labor intensity is great, and the volatile substances of the flux can easily cause harm to the human body.

[0035] Secondly, due to the complex reasons for crystal formation, the crystallization speed and degree of crystallization in the flux tank are not fixed values, so the manual timed cleaning method may result in untimely cleaning.

[0036] In view of this, the embodiment of the present application provides a flux tank and a string soldering machine, wherein the flux tank is designed with an inner tank and an outer tank, wherein the inner tank is used to hold the flux, and the outer tank is used to hold the liquid, the inner tank can be placed in the outer tank, and an operation is applied to the liquid through a crystallization inhibitor to inhibit the crystallization of the flux. In order to enable those skilled in the art to better understand the technical solution of the utility model, the flux tank and the string soldering machine provided by the utility model are described in detail below in conjunction with the accompanying drawings.

[0037] The string welding machine provided in the embodiment of the present application can be specifically applied to realize the welding process of solar cell and welding strip. Specifically, the string welding machine includes a cell feeding device, a welding strip feeding device and a welding device, the welding device is located downstream of the cell feeding device and the welding strip feeding device, the cell feeding device is used to convey the cell to the welding device, the welding strip feeding device is used to convey the welding strip to the welding device, and the welding device is used to weld the cell to the welding strip.

[0038] The soldering strip feeding device is used to apply soldering flux on the surface of the soldering strip before soldering, and to convey the soldering strip pre-coated with soldering flux to the soldering device. Figure 1 This is a schematic diagram of a solder ribbon feeding device in a string soldering machine provided in an embodiment of the present application. Figure 1The solder tape feeding device includes a solder tape winding device 20, a traction device 30 and a flux groove. The solder tape 50 is wound on the solder tape winding device 20. The traction device 30 is used to fix the free end of the solder tape 50, and the traction device 30 can drive the solder tape 50 to be released from the solder tape winding device 20. The flux groove is arranged between the solder tape winding device 20 and the traction device 30.

[0039] Figure 2 A schematic diagram of a flux tank provided in an embodiment of the present application, Figure 3 for Figure 2 The cross-section of the flux tank is shown in Figure 4 for Figure 2 The top view of the flux tank is shown. Figures 1 to 4 The flux tank 10 includes an inner tank 17 and an outer tank 11. The inner tank 17 is used to hold the flux 18. The concentration and composition of the flux 18 are not limited and can be specifically designed according to the needs and actual working conditions. The outer tank 11 is used to hold the liquid 16. The liquid 16 can be a water-based liquid 16 (for example, pure water, deionized water), or an oil-based liquid 16 or a synthetic liquid 16. The top of the outer tank 11 has an opening for the inner tank 17 to pass through, so that the inner tank 17 can be placed in the outer tank 11 through the opening and immersed in the liquid 16. The cross-sectional shapes of the inner tank 17 and the outer tank 11 are not limited to Figure 2 The rectangle shown may also be other shapes such as a circle, an ellipse, etc., and this embodiment does not impose any specific limitation on this.

[0040] The soldering flux tank 10 further includes a crystallization inhibitor, which is used to apply an operation to the liquid 16 to inhibit the soldering flux 18 contained in the inner tank 17 from crystallizing.

[0041] The working principle of the string welding machine of this embodiment is roughly as follows: the traction device 30 applies traction force to the welding tape 50 to pull the welding tape 50 to extend into the inner groove 17 and soak in the flux 18, and then pulls the welding tape 50 dipped in the flux 18 to extend to the outside of the inner groove 17 to transport it to the next process; at the same time, the crystallization inhibitor applies operation to the liquid 16 to prevent the flux 18 from agglomerating and crystallizing, thereby effectively reducing the possibility of crystal formation, so that the crystals retained in the flux 18 are as few as possible, and the impurities in the flux 18 are correspondingly less, which is conducive to weakening the adverse effects of the concentration of the flux 18 reduced due to impurities on the quality of the welding process, thereby ensuring the quality of the welding process.

[0042] In one example, the crystallization inhibitor includes an ultrasonic generator (not shown) disposed on the outer tank 11, which can emit ultrasonic waves, which can cause the liquid 16 to vibrate, thereby driving the solder flux 18 in the inner tank 17 to vibrate. Exemplarily, the ultrasonic generator may specifically include a power supply, a generator, and a transducer, the power supply loads power to the generator, the generator generates a high-frequency electrical signal and transmits it to the transducer, and the transducer converts the high-frequency electrical signal into a mechanical vibration and derives it, so that the liquid 16 vibrates, and the solder flux 18 contained in the inner tank 17 vibrates accordingly. Among them, the generator and the transducer may be specifically disposed on the bottom wall of the outer tank 11, or on the side wall of the outer tank 11.

[0043] In this embodiment, the ultrasonic generator applies vibration to the liquid 16 to drive the soldering flux 18 to vibrate, thereby effectively suppressing the soldering flux 18 from crystallizing.

[0044] In addition, the vibration of the flux 18 can also destroy the combination of the crystal and the inner surface of the inner groove 17, so that the crystal is peeled off from the inner surface of the inner groove 17. That is to say, in this method, the inner surface of the inner groove 17 can be automatically cleaned without manual cleaning of the inner surface of the inner groove 17, and the labor intensity of the manual labor is reduced, which can effectively reduce the labor input to save labor costs and reduce the harm to the human body. Compared with the manual cleaning method, in this method, the welding belt 50 does not need to stop running when the ultrasonic generator is running, that is, the cleaning work of the inner surface of the inner groove 17 and the work of coating the welding belt 50 with the flux 18 are carried out simultaneously, and the string welding machine does not need to be stopped, so the process of cleaning the inner surface of the inner groove 17 will not affect the welding efficiency, so as to ensure the welding efficiency of the string welding machine, and then the production efficiency of the solar cell can be guaranteed. It is particularly important to point out that since the cleaning work of the inner surface of the inner groove 17 and the work of coating the welding belt 50 with the flux 18 are carried out simultaneously, compared with regular cleaning, it is also conducive to reducing the phenomenon of untimely cleaning.

[0045] In addition, the vibration of the flux 18 can also cause the oxide on the surface of the soldering strip 50 to fall off, thereby facilitating the removal of the oxide on the surface of the soldering strip 50 and achieving the cleaning of the soldering strip 50 soaked in the flux 18, thereby ensuring the quality of the soldering process.

[0046] Figure 5 A side view of a flux tank provided in one embodiment of the present application. In another example, Figure 5 As shown, the crystallization inhibitor includes a temperature control device, which is used to control the temperature of the liquid 16. Exemplarily, the temperature control device may specifically include a heater, a temperature detection device and a controller 14, the heater can heat the liquid 16, the temperature detection device is used to detect the temperature of the liquid 16, the controller 14 is electrically connected to the heater and the temperature detection device, and the controller 14 controls the heater according to the temperature detected by the temperature detection device, so that the liquid 16 is heated to a preset temperature.

[0047] The heater may be, for example, a heating wire or an electromagnetic heating element. The temperature detection device may be disposed on the bottom wall of the outer tank 11 , or on the side wall of the outer tank 11 or on the outer surface of the inner tank 17 .

[0048] In this embodiment, the temperature control device can maintain the flux 18 at a preset temperature by applying a temperature control operation to the liquid 16, that is, the liquid 16 and the flux 18 can achieve a constant temperature, thereby ensuring the stability of the temperature of the flux 18. This can reduce the crystallization of the flux 18 due to temperature reasons and play a role in inhibiting the crystallization of the flux 18.

[0049] It is worth noting that, during the operation of the stringer of this embodiment, the liquid 16 is heated by the heater, and the inner tank 17 immersed in the liquid 16 is heated accordingly, thereby indirectly heating the flux 18. In other words, the flux 18 is heated by water bath heating, so that the flux 18 can be heated evenly and steadily, which is conducive to ensuring the stability of the temperature and concentration of the flux 18, and has a favorable effect on the subsequent welding process.

[0050] Of course, in other examples of the present application, the above-mentioned crystallization inhibitor may include an ultrasonic generating device and a temperature control device at the same time, and in this case, the soldering flux 18 is subjected to a dual inhibition effect.

[0051] Based on the embodiment in which the crystallization inhibitor includes a temperature control device, the soldering flux tank 10 may further include a display component disposed on the outer surface of the outer tank 11, the display component being electrically connected to the controller 14, and the controller 14 controlling the display state of the display component according to the temperature of the liquid 16. Exemplarily, the display component may be Figure 5 For example, when the temperature of the liquid 16 reaches a preset temperature, the indicator light 15 can be controlled to emit a green light. When the temperature of the liquid 16 does not reach the preset temperature, the indicator light 15 can be controlled to emit a red light. Alternatively, the display component can also be a display screen, and the controller 14 can control the display screen to display the temperature value of the liquid 16.

[0052] Through such an arrangement, the staff can easily learn the temperature of the liquid 16 according to the display status of the display component.

[0053] In some embodiments, please refer to Figure 5 The flux tank 10 further includes a switch assembly 13 disposed on the outer surface of the outer tank 11, and the switch assembly 13 has an on state and an off state. In the on state, the crystallization inhibitor operates. In the off state, the crystallization inhibitor stops. In this way, the staff can switch between the on state and the off state by manipulating the switch assembly 13 to conveniently control the operation or shutdown of the crystallization inhibitor.

[0054] In the flux tank 10 disclosed herein, there are many possible implementations for the pulling device 30 to pull the solder ribbon 50 to extend into the inner tank 17 , and to pull the solder ribbon 50 dipped with the solder flux 18 to extend out of the inner tank 17 .

[0055] For example, in one possible manner, the soldering ribbon 50 extends from above the inner groove 17 into the inner groove 17 , and the soldering ribbon 50 coated with the solder flux 18 extends upward to pass through the outside of the inner groove 17 .

[0056] For example, in another possible approach, please combine Figure 1 and Figure 2 As shown, the inner groove 17 is provided with an insertion port 171 and an extension port 172, and the outer groove 11 is provided with a first through hole 111 and a second through hole 112. The first through hole 111, the insertion port 171, the interior of the inner groove 17, the extension port 172 and the second through hole 112 are sequentially connected to form a channel for the soldering ribbon 50 to pass through. The traction device 30 applies a traction force to the soldering ribbon 50 to pull the soldering ribbon 50 from the first through hole 111 to the insertion port 171, so that the soldering ribbon 50 extends into the inner groove 17 and is immersed in the soldering flux 18, and pulls the soldering ribbon 50 dipped in the soldering flux 18 to be transported from the extension port 172 to the second through hole 112, and then the soldering ribbon 50 dipped in the soldering flux 18 is transported from the second through hole 112 to the outside of the outer groove 11. In this embodiment, the soldering ribbon 50 passes through the inner groove 17 and the outer groove 11.

[0057] Among them, the height of the first through hole 111 can be equal to the height of the extension port 171, and the first through hole 111 is opposite to and connected to the extension port 171, so that the welding strip 50 can be passed from the first through hole 111 to the extension port 171 in the horizontal direction, so as not to increase the yield strength of the welding strip 50, which is conducive to preventing the solar cell from being bent by the welding strip 50. Similarly, the height of the second through hole 112 can be equal to the height of the extension port 172, and the second through hole 112 is opposite to and connected to the extension port 172, so that the welding strip 50 can be extended from the extension port 172 to the second through hole 112 in the horizontal direction, so as not to increase the yield strength of the welding strip 50, which is conducive to preventing the solar cell from being bent by the welding strip 50.

[0058] For example, see Figure 1, the inlet 171 and the extension port 172 can be arranged on the side wall of the inner groove 17, and the minimum distance h between the inlet 171 and the extension port 172 and the top surface of the inner groove 17 in the vertical direction is greater than 0 mm. In this example, the liquid level of the soldering flux 18 can be lower than the inlet 171 and the extension port 172 to prevent the soldering flux 18 from overflowing out of the inner groove 17; or, a sealing ring is arranged in the inlet 171 and the extension port 172, the sealing ring in the inlet 171 is used to seal the gap between the soldering strip 50 and the hole wall of the inlet 171, and the sealing ring in the extension port 172 is used to seal the gap between the soldering strip 50 and the hole wall of the extension port 172, at this time, the liquid level of the soldering flux 18 can be higher than the inlet 171 and the extension port 172 and lower than the top surface of the inner groove 17.

[0059] For example, see Figure 2 The inlet 171 and the extension port 172 may be disposed on the side wall of the inner tank 17, and the inlet 171 and the extension port 172 are located at the top edge of the inner tank 17. In this example, the liquid level of the soldering flux 18 may be lower than the inlet 171 and the extension port 172.

[0060] Similarly, see Figure 1 , the first through hole 111 and the second through hole 112 can be arranged on the side wall of the outer groove 11, and the minimum distance H between the first through hole 111 and the second through hole 112 and the top surface of the outer groove 11 in the vertical direction is greater than 0mm. In this example, the liquid level of the liquid 16 can be lower than the first through hole 111 and the second through hole 112 to prevent the liquid 16 from moving out of the outer groove 11; or, a sealing ring is arranged in the first through hole 111 and the second through hole 112, and the sealing ring in the first through hole 111 is used to seal the gap between the welding strip 50 and the hole wall of the first through hole 111, and the sealing ring in the second through hole 112 is used to seal the gap between the welding strip 50 and the hole wall of the second through hole 112. At this time, the liquid level of the liquid 16 can be higher than the first through hole 111 and the second through hole 112 and lower than the top surface of the outer groove 11 and the inner groove 17.

[0061] Please continue reading Figures 2 to 4 In some embodiments, the flux tank 10 further includes a cover 12, which can move relative to the outer tank 11 to open and close the opening. During the operation of the stringer, the cover 12 can cover the opening, which can help prevent water vapor and impurities in the external environment from entering the inner tank 17, and further help prevent the concentration of the flux 18 from being affected by the humidity and impurities in the external environment, so as to ensure the quality of the welding process.

[0062] The cover 12 may be, for example, Figure 2 Alternatively, the cover body 12 may also be a cover body structure with an open bottom.

[0063] In some embodiments, the cover 12 can be overlapped on the outer tank 11 or can be separated from the outer tank 11. In this example, when the opening needs to be switched from a closed state to an open state, the staff can move the cover 12 upward in the vertical direction or translate it in the horizontal direction.

[0064] In other embodiments, Figures 2 to 4 As shown, the cover 12 is rotatably connected to the outer groove 11 via a rotating shaft (not shown), the rotating shaft extends in the horizontal direction, and the cover 12 can rotate around the rotating shaft relative to the outer groove 11. Compared with the embodiment in which the cover 12 can be separated from the outer groove 11, in this embodiment, when the opening is opened, the cover 12 is still connected to the outer groove 11, so there is no need to keep the cover 12 specially. Of course, in other feasible embodiments of the present application, the cover 12 can also be slidably connected to the outer groove 11, and the cover 12 can slide in the horizontal direction relative to the outer groove 11 to open and close the opening.

[0065] Based on the embodiment in which the flux tank 10 is provided with the cover 12, Figures 2 to 4 , the cover body 12 may further be provided with an operable handle 121. In this way, the staff can conveniently apply a force to the cover body 12 through the handle 121 to operate the cover body 12 to open and close the opening.

[0066] Based on the embodiment in which the flux tank 10 is provided with the cover 12, Figures 2 to 4 Furthermore, the cover body 12 may be provided with an exhaust hole 122. The shape of the exhaust hole 122 is not restrictive, for example, Figure 2 The number of the exhaust holes 122 is not limited to: Figure 2 The 5 shown can be designed according to needs and actual working conditions.

[0067] The soldering flux 18 is volatile. By designing the exhaust hole 122 , when the string soldering machine is in operation, the cover body 12 covers the opening, and the gas generated by the volatilization of the soldering flux 18 can be discharged to the outside of the outer tank 11 through the exhaust hole 122 .

[0068] Here, "the gas can be discharged to the outside of the outer tank 11 through the exhaust hole 122" should be understood in a broad sense. For example, when the height of the inner tank 17 is less than the height of the outer tank 11, the inner tank 17 is configured to communicate with the inner part of the outer tank 11, and the gas generated by the volatilization of the flux 18 flows from the inner tank 17 into the outer tank 11, and then is discharged to the outside of the outer tank 11 through the exhaust hole 122. For another example, when the top of the inner tank 17 has an opening, the inner tank 17 can be configured so that its top surface fits the cover 12, and the opening is connected to the exhaust hole 122, and the gas generated by the volatilization of the flux 18 can be directly discharged from the opening to the exhaust hole 122, and then discharged to the outside of the outer tank 11 through the exhaust hole 122. It should be noted that if the cover body 12 is a plate structure, then when the top surface of the inner groove 17 is flush with the top surface of the outer groove 11, the top surface of the inner groove 17 can fit with the cover body 12; if the cover body 12 is a cover structure with an open bottom, then when the top surface of the inner groove 17 is higher than the top surface of the outer groove 11, the top surface of the inner groove 17 can fit with the cover body 12.

[0069] Figure 6 for Figure 2 The schematic diagram of the structure of the flux tank without the outer tank is shown. In some embodiments, Figure 2 and Figure 6 As shown, the inner tank 17 has an opening facing upward, and the flux tank 10 further includes a screen 40 . The screen 40 is configured to pass through the opening and the opening, and the screen 40 can be placed in the inner tank 17 or taken out from the inner tank 17 .

[0070] When the stringer of this embodiment is used for welding, the screen 40 can be placed in the inner tank 17 from the open opening before welding. After the stringer has been running for a period of time, when there are many impurities accumulated in the inner tank 17, the staff can take out the screen 40 from the inner tank 17, and the impurities accumulated in the inner tank 17 cannot be filtered out by the screen 40, and then a new screen 40 is placed in the inner tank 17 again.

[0071] With this design, by replacing the screen 40, it is helpful to filter impurities in the soldering flux 18, so as to ensure the stability of the concentration of the soldering flux 18, and further ensure the quality of the welding process. Moreover, when the screen 40 is replaced, the soldering ribbon 50 can still be carried normally, and the stringer does not need to be shut down, so the process of replacing the screen 40 will not affect the welding efficiency, so as to ensure the welding efficiency of the stringer, and further ensure the production efficiency of the solar cell.

[0072] The shape and size of the screen 40 can be respectively matched with the shape and size of the inner groove 17, so that the screen 40 accommodated in the inner groove 17 can fit the inner surface of the inner groove 17. The mesh number of the screen 40 is not specifically limited in this embodiment.

[0073] In some embodiments, please refer to Figure 6, the flux tank 10 may further include a feeding device. The feeding device specifically includes a flux storage container 60, a supply pipeline 61 and a first driver 62. The flux storage container 60 is connected to the inner tank 17 through the supply pipeline 61. The first driver 62 is used to drive the flux 18 in the flux storage container 60 to be transported to the inner tank 17 through the supply pipeline 61. During the operation of the stringer, driven by the first driver 62, the flux storage container 60 can transport the flux 18 to the inner tank 17. With such a configuration, there is no need for manual feeding, and the automation degree of the stringer is improved, which can effectively reduce labor input to save labor costs.

[0074] In some embodiments, please refer to Figure 6 , the flux tank 10 may also include a feeding device. The feeding device specifically includes a flux recovery container 70, a recovery pipeline 71 and a second driver 72. The flux recovery container 70 is connected to the inner tank 17 through the recovery pipeline 71, and the second driver 72 is used to drive the flux 18 in the inner tank 17 to be transported to the flux recovery container 70 through the recovery pipeline 71. After the welding process is completed, the flux 18 in the inner tank 17 can be recovered into the flux recovery container 70 under the drive of the second driver 72. With such a design, the operation of recovering the flux 18 does not need to be completed manually, and the automation degree of the string welding machine is improved, which can effectively reduce the labor input to save labor costs.

[0075] The first driver 62 and the second driver 72 may specifically be water pumps.

[0076] Of course, if Figure 6 As shown, the flux tank 10 can be provided with a loading device and a unloading device at the same time, so the flux tank 10 can realize automatic loading and recovery of the flux 18 at the same time, and the degree of automation is high.

[0077] The outflow end of the supply pipeline 61 and the inflow end of the recovery pipeline 71 may extend from above the inner tank 17 and the outer tank 11 to the inner tank 17 to communicate with the inner tank 17. Alternatively, the outflow end of the supply pipeline 61 and the inflow end of the recovery pipeline 71 may also extend from above the outer tank 11 to the outer tank 11 to communicate with the inner tank 17. Alternatively, Figure 6 As shown, the outflow end of the supply pipeline 61 and the inflow end of the recovery pipeline 71 can also pass through the outer tank 11 and extend into the interior of the outer tank 11 to communicate with the interior of the inner tank 17 .

[0078] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A flux tank, characterized in that: include: Inner tank, the interior is used to hold flux; An outer tank, the interior of which is used to contain liquid, the top of the outer tank has an opening, and the inner tank can be accommodated in the outer tank through the opening and immersed in the liquid; as well as a crystallization inhibitor for applying an operation to the liquid to inhibit crystallization of the soldering flux; Wherein, the crystallization inhibitor comprises an ultrasonic generator arranged on the outer tank, the ultrasonic generator can emit ultrasonic waves, and the ultrasonic waves are used to induce the liquid to vibrate, so as to drive the soldering flux to vibrate; And / or, the crystallization inhibitor includes a heater, a temperature detection device and a controller, the heater can heat the liquid, the temperature detection device is used to detect the temperature of the liquid, the controller is electrically connected to the heater and the temperature detection device, and the controller controls the heater according to the temperature detected by the temperature detection device, so that the liquid is heated to a preset temperature.

2. The flux tank according to claim 1, characterized in that: When the crystallization inhibitor includes a heater, a temperature detection device and a controller, the flux tank also includes a display component arranged on the outer surface of the outer tank, the display component is electrically connected to the controller, and the controller controls the display state of the display component according to the temperature of the liquid.

3. The flux tank according to claim 1, characterized in that: The inner groove is provided with an insertion entrance and a projection entrance, and the outer groove is provided with a first through hole and a second through hole. The first through hole, the insertion entrance, the interior of the inner groove, the projection entrance and the second through hole are connected in sequence to form a channel for the soldering strip to pass through, and the soldering strip passing through the channel is immersed in the flux.

4. The flux tank according to claim 1, characterized in that: A cover body is also included, and the cover body can move relative to the outer groove to open and close the opening.

5. The flux tank according to claim 4, characterized in that: The cover body is provided with an operable handle; And / or, the cover body is movably connected to the outer tank.

6. The flux tank according to claim 4, characterized in that: The cover body is provided with an exhaust hole, and when the cover body covers the opening, the gas in the inner tank can be discharged to the outside of the outer tank through the exhaust hole.

7. The flux tank according to claim 1, characterized in that: The inner tank has an upward opening; the soldering flux tank further comprises a screen, which can be placed in the inner tank or taken out from the inner tank through the opening; when the screen is placed in the inner tank, the screen is used to filter impurities in the soldering flux; And / or, the flux tank further comprises a switch assembly arranged on the outer surface of the outer tank, the switch assembly having an on state and an off state, in which the crystallization inhibitor operates in the on state and stops in the off state.

8. The flux tank according to claim 1, characterized in that: It also includes a flux storage container, a supply pipeline and a first driver, wherein the flux storage container is connected to the inner tank through the supply pipeline, and the first driver is used to drive the flux in the flux storage container to be transported to the inner tank through the supply pipeline; And / or, it also includes a flux recovery container, a recovery pipeline and a second driver, the flux recovery container is connected to the inner tank through the recovery pipeline, and the second driver is used to drive the flux in the inner tank to be transported to the flux recovery container via the recovery pipeline.

9. A string welding machine, characterized in that: include: The flux tank according to any one of claims 1 to 8; as well as The soldering device is located downstream of the soldering flux tank.

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